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wxWidgets/samples/drawing/drawing.cpp
Maarten Bent 1d6c366f14 Make all pages in the drawing sample DPI aware
2022-05-03 22:56:07 +02:00

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/////////////////////////////////////////////////////////////////////////////
// Name: samples/drawing/drawing.cpp
// Purpose: shows and tests wxDC features
// Author: Robert Roebling
// Modified by:
// Created: 04/01/98
// Copyright: (c) Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWidgets headers
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/colordlg.h"
#include "wx/image.h"
#include "wx/artprov.h"
#include "wx/dcbuffer.h"
#include "wx/dcgraph.h"
#include "wx/overlay.h"
#include "wx/graphics.h"
#include "wx/filename.h"
#include "wx/metafile.h"
#include "wx/settings.h"
#if wxUSE_SVG
#include "wx/dcsvg.h"
#endif
#if wxUSE_POSTSCRIPT
#include "wx/dcps.h"
#endif
// ----------------------------------------------------------------------------
// resources
// ----------------------------------------------------------------------------
// the application icon
#ifndef wxHAS_IMAGES_IN_RESOURCES
#include "../sample.xpm"
#endif
// Standard DC supports drawing with alpha on OSX and GTK3.
#if defined(__WXOSX__) || defined(__WXGTK3__)
#define wxDRAWING_DC_SUPPORTS_ALPHA 1
#else
#define wxDRAWING_DC_SUPPORTS_ALPHA 0
#endif // __WXOSX__ || __WXGTK3__
// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------
static wxBitmap *gs_bmpNoMask = NULL,
*gs_bmpWithColMask = NULL,
*gs_bmpMask = NULL,
*gs_bmpWithMask = NULL,
*gs_bmp4 = NULL,
*gs_bmp4_mono = NULL,
*gs_bmp36 = NULL;
// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------
// Define a new application type, each program should derive a class from wxApp
class MyApp : public wxApp
{
public:
// override base class virtuals
// ----------------------------
// this one is called on application startup and is a good place for the app
// initialization (doing it here and not in the ctor allows to have an error
// return: if OnInit() returns false, the application terminates)
virtual bool OnInit() wxOVERRIDE;
virtual int OnExit() wxOVERRIDE { DeleteBitmaps(); return 0; }
protected:
void DeleteBitmaps();
bool LoadImages();
};
class MyFrame;
// define a scrollable canvas for drawing onto
class MyCanvas: public wxScrolledWindow
{
public:
MyCanvas( MyFrame *parent );
void OnPaint(wxPaintEvent &event);
void OnMouseMove(wxMouseEvent &event);
void OnMouseDown(wxMouseEvent &event);
void OnMouseUp(wxMouseEvent &event);
void ToShow(int show) { m_show = show; Refresh(); }
int GetPage() { return m_show; }
// set or remove the clipping region
void Clip(bool clip) { m_clip = clip; Refresh(); }
#if wxUSE_GRAPHICS_CONTEXT
bool HasRenderer() const { return m_renderer != NULL; }
void UseGraphicRenderer(wxGraphicsRenderer* renderer);
bool IsDefaultRenderer() const
{ if ( !m_renderer ) return false;
return m_renderer == wxGraphicsRenderer::GetDefaultRenderer();
}
wxGraphicsRenderer* GetRenderer() const { return m_renderer; }
void EnableAntiAliasing(bool use) { m_useAntiAliasing = use; Refresh(); }
#endif // wxUSE_GRAPHICS_CONTEXT
void UseBuffer(bool use) { m_useBuffer = use; Refresh(); }
void ShowBoundingBox(bool show) { m_showBBox = show; Refresh(); }
wxSize GetDIPDrawingSize() const;
void Draw(wxDC& dc);
protected:
enum DrawMode
{
Draw_Normal,
Draw_Stretch
};
void DrawTestLines( int x, int y, int width, wxDC &dc );
void DrawCrossHair(int x, int y, int width, int heigth, wxDC &dc);
void DrawTestPoly(wxDC& dc);
void DrawTestBrushes(wxDC& dc);
void DrawText(wxDC& dc);
void DrawImages(wxDC& dc, DrawMode mode);
void DrawWithLogicalOps(wxDC& dc);
#if wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
void DrawAlpha(wxDC& dc);
#endif
#if wxUSE_GRAPHICS_CONTEXT
void DrawGraphics(wxGraphicsContext* gc);
#endif
void DrawRegions(wxDC& dc);
void DrawCircles(wxDC& dc);
void DrawSplines(wxDC& dc);
void DrawDefault(wxDC& dc);
void DrawGradients(wxDC& dc);
void DrawSystemColours(wxDC& dc);
void DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime);
private:
MyFrame *m_owner;
int m_show;
wxBitmap m_smile_bmp;
wxIcon m_std_icon;
bool m_clip;
wxOverlay m_overlay;
bool m_rubberBand;
wxPoint m_anchorpoint;
wxPoint m_currentpoint;
#if wxUSE_GRAPHICS_CONTEXT
wxGraphicsRenderer* m_renderer;
bool m_useAntiAliasing;
#endif
bool m_useBuffer;
bool m_showBBox;
wxSize m_sizeDIP;
wxDECLARE_EVENT_TABLE();
};
// Define a new frame type: this is going to be our main frame
class MyFrame : public wxFrame
{
public:
// ctor(s)
MyFrame(const wxString& title);
// event handlers (these functions should _not_ be virtual)
void OnQuit(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
void OnClip(wxCommandEvent& event);
#if wxUSE_GRAPHICS_CONTEXT
void OnGraphicContextNone(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(NULL);
}
void OnGraphicContextDefault(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetDefaultRenderer());
}
#if wxUSE_CAIRO
void OnGraphicContextCairo(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetCairoRenderer());
}
#endif // wxUSE_CAIRO
#ifdef __WXMSW__
#if wxUSE_GRAPHICS_GDIPLUS
void OnGraphicContextGDIPlus(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetGDIPlusRenderer());
}
#endif
#if wxUSE_GRAPHICS_DIRECT2D
void OnGraphicContextDirect2D(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetDirect2DRenderer());
}
#endif
#endif // __WXMSW__
void OnAntiAliasing(wxCommandEvent& event)
{
m_canvas->EnableAntiAliasing(event.IsChecked());
}
void OnAntiAliasingUpdateUI(wxUpdateUIEvent& event)
{
event.Enable(m_canvas->GetRenderer() != NULL);
}
#endif // wxUSE_GRAPHICS_CONTEXT
void OnBuffer(wxCommandEvent& event);
void OnCopy(wxCommandEvent& event);
void OnSave(wxCommandEvent& event);
void OnShow(wxCommandEvent &event);
void OnOption(wxCommandEvent &event);
void OnBoundingBox(wxCommandEvent& evt);
void OnBoundingBoxUpdateUI(wxUpdateUIEvent& evt);
#if wxUSE_COLOURDLG
wxColour SelectColour();
#endif // wxUSE_COLOURDLG
void PrepareDC(wxDC& dc) wxOVERRIDE;
int m_backgroundMode;
int m_textureBackground;
wxMappingMode m_mapMode;
double m_xUserScale;
double m_yUserScale;
int m_xLogicalOrigin;
int m_yLogicalOrigin;
bool m_xAxisReversed,
m_yAxisReversed;
#if wxUSE_DC_TRANSFORM_MATRIX
wxDouble m_transform_dx;
wxDouble m_transform_dy;
wxDouble m_transform_scx;
wxDouble m_transform_scy;
wxDouble m_transform_rot;
#endif // wxUSE_DC_TRANSFORM_MATRIX
wxColour m_colourForeground, // these are _text_ colours
m_colourBackground;
wxBrush m_backgroundBrush;
MyCanvas *m_canvas;
wxMenuItem *m_menuItemUseDC;
private:
// any class wishing to process wxWidgets events must use this macro
wxDECLARE_EVENT_TABLE();
};
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// IDs for the controls and the menu commands
enum
{
// menu items
File_Quit = wxID_EXIT,
File_About = wxID_ABOUT,
MenuShow_First = wxID_HIGHEST,
File_ShowDefault = MenuShow_First,
File_ShowText,
File_ShowLines,
File_ShowBrushes,
File_ShowPolygons,
File_ShowMask,
File_ShowMaskStretch,
File_ShowOps,
File_ShowRegions,
File_ShowCircles,
File_ShowSplines,
#if wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
File_ShowAlpha,
#endif // wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
#if wxUSE_GRAPHICS_CONTEXT
File_ShowGraphics,
#endif
File_ShowSystemColours,
File_ShowGradients,
MenuShow_Last = File_ShowGradients,
#if wxUSE_GRAPHICS_CONTEXT
File_DC,
File_GC_Default,
#if wxUSE_CAIRO
File_GC_Cairo,
#endif // wxUSE_CAIRO
#ifdef __WXMSW__
#if wxUSE_GRAPHICS_GDIPLUS
File_GC_GDIPlus,
#endif
#if wxUSE_GRAPHICS_DIRECT2D
File_GC_Direct2D,
#endif
#endif // __WXMSW__
#endif // wxUSE_GRAPHICS_CONTEXT
File_BBox,
File_Clip,
File_Buffer,
#if wxUSE_GRAPHICS_CONTEXT
File_AntiAliasing,
#endif
File_Copy,
File_Save,
MenuOption_First,
MapMode_Text = MenuOption_First,
MapMode_Lometric,
MapMode_Twips,
MapMode_Points,
MapMode_Metric,
UserScale_StretchHoriz,
UserScale_ShrinkHoriz,
UserScale_StretchVertic,
UserScale_ShrinkVertic,
UserScale_Restore,
AxisMirror_Horiz,
AxisMirror_Vertic,
LogicalOrigin_MoveDown,
LogicalOrigin_MoveUp,
LogicalOrigin_MoveLeft,
LogicalOrigin_MoveRight,
LogicalOrigin_Set,
LogicalOrigin_Restore,
#if wxUSE_DC_TRANSFORM_MATRIX
TransformMatrix_Set,
TransformMatrix_Reset,
#endif // wxUSE_DC_TRANSFORM_MATRIX
#if wxUSE_COLOURDLG
Colour_TextForeground,
Colour_TextBackground,
Colour_Background,
#endif // wxUSE_COLOURDLG
Colour_BackgroundMode,
Colour_TextureBackgound,
MenuOption_Last = Colour_TextureBackgound
};
// ----------------------------------------------------------------------------
// event tables and other macros for wxWidgets
// ----------------------------------------------------------------------------
// Create a new application object: this macro will allow wxWidgets to create
// the application object during program execution (it's better than using a
// static object for many reasons) and also declares the accessor function
// wxGetApp() which will return the reference of the right type (i.e. MyApp and
// not wxApp)
wxIMPLEMENT_APP(MyApp);
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// the application class
// ----------------------------------------------------------------------------
bool MyApp::LoadImages()
{
gs_bmpNoMask = new wxBitmap;
gs_bmpWithColMask = new wxBitmap;
gs_bmpMask = new wxBitmap;
gs_bmpWithMask = new wxBitmap;
gs_bmp4 = new wxBitmap;
gs_bmp4_mono = new wxBitmap;
gs_bmp36 = new wxBitmap;
wxPathList pathList;
// special hack for Unix in-tree sample build, don't do this in real
// programs, use wxStandardPaths instead
pathList.Add(wxFileName(argv[0]).GetPath());
pathList.Add(".");
pathList.Add("..");
pathList.Add("../drawing");
pathList.Add("../../../samples/drawing");
wxString path = pathList.FindValidPath("pat4.bmp");
if ( !path )
return false;
/* 4 colour bitmap */
gs_bmp4->LoadFile(path, wxBITMAP_TYPE_BMP);
/* turn into mono-bitmap */
gs_bmp4_mono->LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask* mask4 = new wxMask(*gs_bmp4_mono, *wxBLACK);
gs_bmp4_mono->SetMask(mask4);
path = pathList.FindValidPath("pat36.bmp");
if ( !path )
return false;
gs_bmp36->LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask* mask36 = new wxMask(*gs_bmp36, *wxBLACK);
gs_bmp36->SetMask(mask36);
path = pathList.FindValidPath("image.bmp");
if ( !path )
return false;
gs_bmpNoMask->LoadFile(path, wxBITMAP_TYPE_BMP);
gs_bmpWithMask->LoadFile(path, wxBITMAP_TYPE_BMP);
gs_bmpWithColMask->LoadFile(path, wxBITMAP_TYPE_BMP);
path = pathList.FindValidPath("mask.bmp");
if ( !path )
return false;
gs_bmpMask->LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask *mask = new wxMask(*gs_bmpMask, *wxBLACK);
gs_bmpWithMask->SetMask(mask);
mask = new wxMask(*gs_bmpWithColMask, *wxWHITE);
gs_bmpWithColMask->SetMask(mask);
return true;
}
// `Main program' equivalent: the program execution "starts" here
bool MyApp::OnInit()
{
if ( !wxApp::OnInit() )
return false;
#if wxUSE_LIBPNG
wxImage::AddHandler( new wxPNGHandler );
#endif
// Create the main application window
MyFrame *frame = new MyFrame("Drawing sample");
// Show it
frame->Show(true);
if ( !LoadImages() )
{
wxLogError("Can't load one of the bitmap files needed "
"for this sample from the current or parent "
"directory, please copy them there.");
// still continue, the sample can be used without images too if they're
// missing for whatever reason
}
return true;
}
void MyApp::DeleteBitmaps()
{
wxDELETE(gs_bmpNoMask);
wxDELETE(gs_bmpWithColMask);
wxDELETE(gs_bmpMask);
wxDELETE(gs_bmpWithMask);
wxDELETE(gs_bmp4);
wxDELETE(gs_bmp4_mono);
wxDELETE(gs_bmp36);
}
// ----------------------------------------------------------------------------
// MyCanvas
// ----------------------------------------------------------------------------
// the event tables connect the wxWidgets events with the functions (event
// handlers) which process them.
wxBEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
EVT_PAINT (MyCanvas::OnPaint)
EVT_MOTION (MyCanvas::OnMouseMove)
EVT_LEFT_DOWN (MyCanvas::OnMouseDown)
EVT_LEFT_UP (MyCanvas::OnMouseUp)
wxEND_EVENT_TABLE()
#include "smile.xpm"
MyCanvas::MyCanvas(MyFrame *parent)
: wxScrolledWindow(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
wxHSCROLL | wxVSCROLL)
{
m_owner = parent;
m_show = File_ShowDefault;
m_smile_bmp = wxBitmap(smile_xpm);
m_std_icon = wxArtProvider::GetIcon(wxART_INFORMATION);
m_clip = false;
m_rubberBand = false;
#if wxUSE_GRAPHICS_CONTEXT
m_renderer = NULL;
m_useAntiAliasing = true;
#endif
m_useBuffer = false;
m_showBBox = false;
m_sizeDIP = wxSize(0, 0);
}
void MyCanvas::DrawTestBrushes(wxDC& dc)
{
const wxCoord WIDTH = dc.FromDIP(200);
const wxCoord HEIGHT = dc.FromDIP(80);
wxCoord x = dc.FromDIP(10),
y = dc.FromDIP(10),
o = dc.FromDIP(10);
dc.SetBrush(*wxGREEN_BRUSH);
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Solid green", x + o, y + o);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxRED, wxBRUSHSTYLE_CROSSDIAG_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Diagonally hatched red", x + o, y + o);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxBLUE, wxBRUSHSTYLE_CROSS_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Cross hatched blue", x + o, y + o);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxCYAN, wxBRUSHSTYLE_VERTICAL_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Vertically hatched cyan", x + o, y + o);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxBLACK, wxBRUSHSTYLE_HORIZONTAL_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Horizontally hatched black", x + o, y + o);
y += HEIGHT;
dc.SetBrush(wxBrush(*gs_bmpMask));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Stipple mono", x + o, y + o);
y += HEIGHT;
dc.SetBrush(wxBrush(*gs_bmpNoMask));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Stipple colour", x + o, y + o);
}
void MyCanvas::DrawTestPoly(wxDC& dc)
{
wxBrush brushHatch(*wxRED, wxBRUSHSTYLE_FDIAGONAL_HATCH);
dc.SetBrush(brushHatch);
wxPoint star[5];
star[0] = dc.FromDIP(wxPoint(100, 60));
star[1] = dc.FromDIP(wxPoint(60, 150));
star[2] = dc.FromDIP(wxPoint(160, 100));
star[3] = dc.FromDIP(wxPoint(40, 100));
star[4] = dc.FromDIP(wxPoint(140, 150));
dc.DrawText("You should see two (irregular) stars below, the left one "
"hatched", dc.FromDIP(10), dc.FromDIP(10));
dc.DrawText("except for the central region and the right "
"one entirely hatched", dc.FromDIP(10), dc.FromDIP(30));
dc.DrawText("The third star only has a hatched outline", dc.FromDIP(10), dc.FromDIP(50));
dc.DrawPolygon(WXSIZEOF(star), star, 0, dc.FromDIP(30));
dc.DrawPolygon(WXSIZEOF(star), star, dc.FromDIP(160), dc.FromDIP(30), wxWINDING_RULE);
wxBrush brushHatchGreen(*wxGREEN, wxBRUSHSTYLE_FDIAGONAL_HATCH);
dc.SetBrush(brushHatchGreen);
wxPoint star2[10];
star2[0] = dc.FromDIP(wxPoint(0, 100));
star2[1] = dc.FromDIP(wxPoint(-59, -81));
star2[2] = dc.FromDIP(wxPoint(95, 31));
star2[3] = dc.FromDIP(wxPoint(-95, 31));
star2[4] = dc.FromDIP(wxPoint(59, -81));
star2[5] = dc.FromDIP(wxPoint(0, 80));
star2[6] = dc.FromDIP(wxPoint(-47, -64));
star2[7] = dc.FromDIP(wxPoint(76, 24));
star2[8] = dc.FromDIP(wxPoint(-76, 24));
star2[9] = dc.FromDIP(wxPoint(47, -64));
int count[2] = {5, 5};
dc.DrawPolyPolygon(WXSIZEOF(count), count, star2, dc.FromDIP(450), dc.FromDIP(150));
}
void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc )
{
dc.SetPen( wxPen( *wxBLACK, width ) );
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawText(wxString::Format("Testing lines of width %d", width), dc.FromDIP(x + 10), dc.FromDIP(y - 10));
dc.DrawRectangle(dc.FromDIP(x + 10), dc.FromDIP(y + 10), dc.FromDIP(100), dc.FromDIP(190));
dc.DrawText("Solid/dot/short dash/long dash/dot dash", dc.FromDIP(x + 150), dc.FromDIP(y + 10));
dc.SetPen( wxPen( *wxBLACK, width ) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 20), dc.FromDIP(100), dc.FromDIP(y + 20));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_DOT) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 30), dc.FromDIP(100), dc.FromDIP(y + 30));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_SHORT_DASH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 40), dc.FromDIP(100), dc.FromDIP(y + 40));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_LONG_DASH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 50), dc.FromDIP(100), dc.FromDIP(y + 50));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_DOT_DASH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 60), dc.FromDIP(100), dc.FromDIP(y + 60));
dc.DrawText("Hatches", dc.FromDIP(x + 150), dc.FromDIP(y + 70));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_BDIAGONAL_HATCH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 70), dc.FromDIP(100), dc.FromDIP(y + 70));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_CROSSDIAG_HATCH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 80), dc.FromDIP(100), dc.FromDIP(y + 80));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_FDIAGONAL_HATCH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 90), dc.FromDIP(100), dc.FromDIP(y + 90));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_CROSS_HATCH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 100), dc.FromDIP(100), dc.FromDIP(y + 100));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_HORIZONTAL_HATCH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 110), dc.FromDIP(100), dc.FromDIP(y + 110));
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_VERTICAL_HATCH) );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 120), dc.FromDIP(100), dc.FromDIP(y + 120));
dc.DrawText("User dash", dc.FromDIP(x + 150), dc.FromDIP(y + 140));
wxPen ud( *wxBLACK, width, wxPENSTYLE_USER_DASH );
wxDash dash1[6];
dash1[0] = 8; // Long dash <---------+
dash1[1] = 2; // Short gap |
dash1[2] = 3; // Short dash |
dash1[3] = 2; // Short gap |
dash1[4] = 3; // Short dash |
dash1[5] = 2; // Short gap and repeat +
ud.SetDashes( 6, dash1 );
dc.SetPen( ud );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 140), dc.FromDIP(100), dc.FromDIP(y + 140));
dash1[0] = 5; // Make first dash shorter
ud.SetDashes( 6, dash1 );
dc.SetPen( ud );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 150), dc.FromDIP(100), dc.FromDIP(y + 150));
dash1[2] = 5; // Make second dash longer
ud.SetDashes( 6, dash1 );
dc.SetPen( ud );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 160), dc.FromDIP(100), dc.FromDIP(y + 160));
dash1[4] = 5; // Make third dash longer
ud.SetDashes( 6, dash1 );
dc.SetPen( ud );
dc.DrawLine(dc.FromDIP(x + 20), dc.FromDIP(y + 170), dc.FromDIP(100), dc.FromDIP(y + 170));
wxPen penWithCap(*wxBLACK, width);
dc.SetPen(penWithCap);
dc.DrawText("Default cap", dc.FromDIP(x + 270), dc.FromDIP(y + 40));
dc.DrawLine(dc.FromDIP(x + 200), dc.FromDIP(y + 50), dc.FromDIP(x + 250), dc.FromDIP(y + 50));
penWithCap.SetCap(wxCAP_BUTT);
dc.SetPen(penWithCap);
dc.DrawText("Butt ", dc.FromDIP(x + 270), dc.FromDIP(y + 60));
dc.DrawLine(dc.FromDIP(x + 200), dc.FromDIP(y + 70), dc.FromDIP(x + 250), dc.FromDIP(y + 70));
penWithCap.SetCap(wxCAP_ROUND);
dc.SetPen(penWithCap);
dc.DrawText("Round cap", dc.FromDIP(x + 270), dc.FromDIP(y + 80));
dc.DrawLine(dc.FromDIP(x + 200), dc.FromDIP(y + 90), dc.FromDIP(x + 250), dc.FromDIP(y + 90));
penWithCap.SetCap(wxCAP_PROJECTING);
dc.SetPen(penWithCap);
dc.DrawText("Projecting cap", dc.FromDIP(x + 270), dc.FromDIP(y + 100));
dc.DrawLine(dc.FromDIP(x + 200), dc.FromDIP(y + 110), dc.FromDIP(x + 250), dc.FromDIP(y + 110));
}
void MyCanvas::DrawCrossHair(int x, int y, int width, int heigth, wxDC &dc)
{
dc.DrawText("Cross hair", dc.FromDIP(x + 10), dc.FromDIP(y + 10));
dc.SetClippingRegion(dc.FromDIP(x), dc.FromDIP(y), dc.FromDIP(width), dc.FromDIP(heigth));
dc.SetPen(wxPen(*wxBLUE, 2));
dc.CrossHair(dc.FromDIP(x + width / 2), dc.FromDIP(y + heigth / 2));
dc.DestroyClippingRegion();
}
void MyCanvas::DrawDefault(wxDC& dc)
{
// Draw circle centered at the origin, then flood fill it with a different
// color. Done with a wxMemoryDC because Blit (used by generic
// wxDoFloodFill) from a window that is being painted gives unpredictable
// results on wxGTK
{
wxImage img(dc.FromDIP(21), dc.FromDIP(21), false);
img.Clear(1);
wxBitmap bmp(img);
{
wxMemoryDC mdc(bmp);
mdc.SetBrush(dc.GetBrush());
mdc.SetPen(dc.GetPen());
mdc.DrawCircle(dc.FromDIP(10), dc.FromDIP(10), dc.FromDIP(10));
wxColour c;
if (mdc.GetPixel(dc.FromDIP(11), dc.FromDIP(11), &c))
{
mdc.SetBrush(wxColour(128, 128, 0));
mdc.FloodFill(dc.FromDIP(11), dc.FromDIP(11), c, wxFLOOD_SURFACE);
}
}
bmp.SetMask(new wxMask(bmp, wxColour(1, 1, 1)));
dc.DrawBitmap(bmp, dc.FromDIP(-10), dc.FromDIP(-10), true);
}
dc.DrawCheckMark(dc.FromDIP(5), dc.FromDIP(80), dc.FromDIP(15), dc.FromDIP(15));
dc.DrawCheckMark(dc.FromDIP(25), dc.FromDIP(80), dc.FromDIP(30), dc.FromDIP(30));
dc.DrawCheckMark(dc.FromDIP(60), dc.FromDIP(80), dc.FromDIP(60), dc.FromDIP(60));
// this is the test for "blitting bitmap into DC damages selected brush" bug
wxCoord rectSize = m_std_icon.GetWidth() + dc.FromDIP(10);
wxCoord x = dc.FromDIP(100);
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxGREEN_BRUSH );
dc.DrawRectangle(x, dc.FromDIP(10), rectSize, rectSize);
dc.DrawBitmap(m_std_icon, x + dc.FromDIP(5), dc.FromDIP(15), true);
x += rectSize + dc.FromDIP(10);
dc.DrawRectangle(x, dc.FromDIP(10), rectSize, rectSize);
dc.DrawIcon(m_std_icon, x + dc.FromDIP(5), dc.FromDIP(15));
x += rectSize + dc.FromDIP(10);
dc.DrawRectangle(x, dc.FromDIP(10), rectSize, rectSize);
// test for "transparent" bitmap drawing (it intersects with the last
// rectangle above)
//dc.SetBrush( *wxTRANSPARENT_BRUSH );
if (m_smile_bmp.IsOk())
dc.DrawBitmap(m_smile_bmp, x + rectSize - dc.FromDIP(20), rectSize - dc.FromDIP(10), true);
dc.SetBrush( *wxBLACK_BRUSH );
dc.DrawRectangle( 0, dc.FromDIP(160), dc.FromDIP(1000), dc.FromDIP(300) );
// draw lines
wxBitmap bitmap(dc.FromDIP(wxSize(20,70)));
wxMemoryDC memdc;
memdc.SelectObject( bitmap );
memdc.SetBrush( *wxBLACK_BRUSH );
memdc.SetPen( *wxWHITE_PEN );
memdc.DrawRectangle(0, 0, dc.FromDIP(20), dc.FromDIP(70));
memdc.DrawLine( dc.FromDIP(10), 0, dc.FromDIP(10), dc.FromDIP(70) );
// to the right
wxPen pen = *wxRED_PEN;
memdc.SetPen(pen);
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(5), dc.FromDIP(10), dc.FromDIP(5) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(10), dc.FromDIP(11), dc.FromDIP(10) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(15), dc.FromDIP(12), dc.FromDIP(15) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(20), dc.FromDIP(13), dc.FromDIP(20) );
/*
memdc.SetPen(*wxRED_PEN);
memdc.DrawLine( dc.FromDIP(12),dc.FromDIP( 5),dc.FromDIP(12),dc.FromDIP( 5) );
memdc.DrawLine( dc.FromDIP(12),dc.FromDIP(10),dc.FromDIP(13),dc.FromDIP(10) );
memdc.DrawLine( dc.FromDIP(12),dc.FromDIP(15),dc.FromDIP(14),dc.FromDIP(15) );
memdc.DrawLine( dc.FromDIP(12),dc.FromDIP(20),dc.FromDIP(15),dc.FromDIP(20) );
*/
// same to the left
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(25), dc.FromDIP(10), dc.FromDIP(25) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(30), dc.FromDIP(9), dc.FromDIP(30) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(35), dc.FromDIP(8), dc.FromDIP(35) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(40), dc.FromDIP(7), dc.FromDIP(40) );
// XOR draw lines
dc.SetPen(*wxWHITE_PEN);
memdc.SetLogicalFunction( wxINVERT );
memdc.SetPen( *wxWHITE_PEN );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(50), dc.FromDIP(10), dc.FromDIP(50) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(55), dc.FromDIP(11), dc.FromDIP(55) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(60), dc.FromDIP(12), dc.FromDIP(60) );
memdc.DrawLine( dc.FromDIP(10), dc.FromDIP(65), dc.FromDIP(13), dc.FromDIP(65) );
memdc.DrawLine( dc.FromDIP(12), dc.FromDIP(50), dc.FromDIP(12), dc.FromDIP(50) );
memdc.DrawLine( dc.FromDIP(12), dc.FromDIP(55), dc.FromDIP(13), dc.FromDIP(55) );
memdc.DrawLine( dc.FromDIP(12), dc.FromDIP(60), dc.FromDIP(14), dc.FromDIP(60) );
memdc.DrawLine( dc.FromDIP(12), dc.FromDIP(65), dc.FromDIP(15), dc.FromDIP(65) );
memdc.SelectObject( wxNullBitmap );
dc.DrawBitmap( bitmap, dc.FromDIP(10), dc.FromDIP(170) );
wxImage image = bitmap.ConvertToImage();
image.Rescale( dc.FromDIP(60), dc.FromDIP(210) );
bitmap = wxBitmap(image);
dc.DrawBitmap( bitmap, dc.FromDIP(50), dc.FromDIP(170) );
// test the rectangle outline drawing - there should be one pixel between
// the rect and the lines
dc.SetPen(*wxWHITE_PEN);
dc.SetBrush( *wxTRANSPARENT_BRUSH );
dc.DrawRectangle(dc.FromDIP(150), dc.FromDIP(170), dc.FromDIP(49), dc.FromDIP(29));
dc.DrawRectangle(dc.FromDIP(200), dc.FromDIP(170), dc.FromDIP(49), dc.FromDIP(29));
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(dc.FromDIP(250), dc.FromDIP(210), dc.FromDIP(250), dc.FromDIP(170));
dc.DrawLine(dc.FromDIP(260), dc.FromDIP(200), dc.FromDIP(150), dc.FromDIP(200));
// test the rectangle filled drawing - there should be one pixel between
// the rect and the lines
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(dc.FromDIP(300), dc.FromDIP(170), dc.FromDIP(49), dc.FromDIP(29));
dc.DrawRectangle(dc.FromDIP(350), dc.FromDIP(170), dc.FromDIP(49), dc.FromDIP(29));
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(dc.FromDIP(400), dc.FromDIP(170), dc.FromDIP(400), dc.FromDIP(210));
dc.DrawLine(dc.FromDIP(300), dc.FromDIP(200), dc.FromDIP(410), dc.FromDIP(200));
// a few more tests of this kind
dc.SetPen(*wxRED_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(dc.FromDIP(300), dc.FromDIP(220), dc.FromDIP(1), dc.FromDIP(1));
dc.DrawRectangle(dc.FromDIP(310), dc.FromDIP(220), dc.FromDIP(2), dc.FromDIP(2));
dc.DrawRectangle(dc.FromDIP(320), dc.FromDIP(220), dc.FromDIP(3), dc.FromDIP(3));
dc.DrawRectangle(dc.FromDIP(330), dc.FromDIP(220), dc.FromDIP(4), dc.FromDIP(4));
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(dc.FromDIP(300), dc.FromDIP(230), dc.FromDIP(1), dc.FromDIP(1));
dc.DrawRectangle(dc.FromDIP(310), dc.FromDIP(230), dc.FromDIP(2), dc.FromDIP(2));
dc.DrawRectangle(dc.FromDIP(320), dc.FromDIP(230), dc.FromDIP(3), dc.FromDIP(3));
dc.DrawRectangle(dc.FromDIP(330), dc.FromDIP(230), dc.FromDIP(4), dc.FromDIP(4));
// and now for filled rect with outline
dc.SetPen(*wxRED_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(dc.FromDIP(500), dc.FromDIP(170), dc.FromDIP(49), dc.FromDIP(29));
dc.DrawRectangle(dc.FromDIP(550), dc.FromDIP(170), dc.FromDIP(49), dc.FromDIP(29));
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(dc.FromDIP(600), dc.FromDIP(170), dc.FromDIP(600), dc.FromDIP(210));
dc.DrawLine(dc.FromDIP(500), dc.FromDIP(200), dc.FromDIP(610), dc.FromDIP(200));
// test the rectangle outline drawing - there should be one pixel between
// the rect and the lines
dc.SetPen(*wxWHITE_PEN);
dc.SetBrush( *wxTRANSPARENT_BRUSH );
dc.DrawRoundedRectangle(dc.FromDIP(150), dc.FromDIP(270), dc.FromDIP(49), dc.FromDIP(29), dc.FromDIP(6));
dc.DrawRoundedRectangle(dc.FromDIP(200), dc.FromDIP(270), dc.FromDIP(49), dc.FromDIP(29), dc.FromDIP(6));
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(dc.FromDIP(250), dc.FromDIP(270), dc.FromDIP(250), dc.FromDIP(310));
dc.DrawLine(dc.FromDIP(150), dc.FromDIP(300), dc.FromDIP(260), dc.FromDIP(300));
// test the rectangle filled drawing - there should be one pixel between
// the rect and the lines
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRoundedRectangle(dc.FromDIP(300), dc.FromDIP(270), dc.FromDIP(49), dc.FromDIP(29), dc.FromDIP(6));
dc.DrawRoundedRectangle(dc.FromDIP(350), dc.FromDIP(270), dc.FromDIP(49), dc.FromDIP(29), dc.FromDIP(6));
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(dc.FromDIP(400), dc.FromDIP(270), dc.FromDIP(400), dc.FromDIP(310));
dc.DrawLine(dc.FromDIP(300), dc.FromDIP(300), dc.FromDIP(410), dc.FromDIP(300));
// Added by JACS to demonstrate bizarre behaviour.
// With a size of 70, we get a missing red RHS,
// and the height is too small, so we get yellow
// showing. With a size of 40, it draws as expected:
// it just shows a white rectangle with red outline.
int totalWidth = dc.FromDIP(70);
int totalHeight = dc.FromDIP(70);
wxBitmap bitmap2(totalWidth, totalHeight);
wxMemoryDC memdc2;
memdc2.SelectObject(bitmap2);
memdc2.SetBackground(*wxYELLOW_BRUSH);
memdc2.Clear();
// Now draw a white rectangle with red outline. It should
// entirely eclipse the yellow background.
memdc2.SetPen(*wxRED_PEN);
memdc2.SetBrush(*wxWHITE_BRUSH);
memdc2.DrawRectangle(0, 0, totalWidth, totalHeight);
memdc2.SetPen(wxNullPen);
memdc2.SetBrush(wxNullBrush);
memdc2.SelectObject(wxNullBitmap);
dc.DrawBitmap(bitmap2, dc.FromDIP(500), dc.FromDIP(270));
// Repeat, but draw directly on dc
// Draw a yellow rectangle filling the bitmap
x = dc.FromDIP(600); int y = dc.FromDIP(270);
dc.SetPen(*wxYELLOW_PEN);
dc.SetBrush(*wxYELLOW_BRUSH);
dc.DrawRectangle(x, y, totalWidth, totalHeight);
// Now draw a white rectangle with red outline. It should
// entirely eclipse the yellow background.
dc.SetPen(*wxRED_PEN);
dc.SetBrush(*wxWHITE_BRUSH);
dc.DrawRectangle(x, y, totalWidth, totalHeight);
}
void MyCanvas::DrawText(wxDC& dc)
{
// set underlined font for testing
dc.SetFont( wxFontInfo(12).Family(wxFONTFAMILY_MODERN).Underlined() );
dc.DrawText( "This is text", dc.FromDIP(110), dc.FromDIP(10) );
dc.DrawRotatedText( "That is text", dc.FromDIP(20), dc.FromDIP(10), -45 );
// use wxSWISS_FONT and not wxNORMAL_FONT as the latter can't be rotated
// under MSW (it is not TrueType)
dc.SetFont( *wxSWISS_FONT );
wxString text;
dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
for ( int n = -180; n < 180; n += 30 )
{
text.Printf(" %d rotated text", n);
dc.DrawRotatedText(text , dc.FromDIP(400), dc.FromDIP(400), n);
}
dc.SetFont( wxFontInfo(18).Family(wxFONTFAMILY_SWISS) );
dc.DrawText( "This is Swiss 18pt text.", dc.FromDIP(110), dc.FromDIP(40) );
wxCoord length;
wxCoord height;
wxCoord descent;
dc.GetTextExtent( "This is Swiss 18pt text.", &length, &height, &descent );
text.Printf( "Dimensions are length %d, height %d, descent %d", length, height, descent );
dc.DrawText( text, dc.FromDIP(110), dc.FromDIP(80) );
text.Printf( "CharHeight() returns: %d", dc.GetCharHeight() );
dc.DrawText( text, dc.FromDIP(110), dc.FromDIP(120) );
dc.DrawRectangle( dc.FromDIP(100), dc.FromDIP(40), dc.FromDIP(4), dc.FromDIP(height) );
// test the logical function effect
wxCoord y = dc.FromDIP(150);
dc.SetLogicalFunction(wxINVERT);
// text drawing should ignore logical function
dc.DrawText( "There should be a text below", dc.FromDIP(110), y );
dc.DrawRectangle( dc.FromDIP(110), y, dc.FromDIP(100), height );
y += height;
dc.DrawText( "Visible text", dc.FromDIP(110), y );
dc.DrawRectangle( dc.FromDIP(110), y, dc.FromDIP(100), height );
dc.DrawText( "Visible text", dc.FromDIP(110), y );
dc.DrawRectangle( dc.FromDIP(110), y, dc.FromDIP(100), height );
dc.SetLogicalFunction(wxCOPY);
y += height;
dc.DrawRectangle( dc.FromDIP(110), y, dc.FromDIP(100), height );
dc.DrawText( "Another visible text", dc.FromDIP(110), y );
y += height;
dc.DrawText("And\nmore\ntext on\nmultiple\nlines", dc.FromDIP(110), y);
y += 5*height;
dc.SetTextForeground(*wxBLUE);
dc.DrawRotatedText("Rotated text\ncan have\nmultiple lines\nas well", dc.FromDIP(110), y, 15);
y += 7*height;
dc.SetFont(wxFontInfo(12).Family(wxFONTFAMILY_TELETYPE));
dc.SetTextForeground(wxColour(150, 75, 0));
dc.DrawText("And some text with tab characters:\n123456789012345678901234567890\n\taa\tbbb\tcccc", dc.FromDIP(10), y);
}
static const struct
{
wxString name;
wxRasterOperationMode rop;
} rasterOperations[] =
{
{ "wxAND", wxAND },
{ "wxAND_INVERT", wxAND_INVERT },
{ "wxAND_REVERSE", wxAND_REVERSE },
{ "wxCLEAR", wxCLEAR },
{ "wxCOPY", wxCOPY },
{ "wxEQUIV", wxEQUIV },
{ "wxINVERT", wxINVERT },
{ "wxNAND", wxNAND },
{ "wxNO_OP", wxNO_OP },
{ "wxOR", wxOR },
{ "wxOR_INVERT", wxOR_INVERT },
{ "wxOR_REVERSE", wxOR_REVERSE },
{ "wxSET", wxSET },
{ "wxSRC_INVERT", wxSRC_INVERT },
{ "wxXOR", wxXOR },
};
void MyCanvas::DrawImages(wxDC& dc, DrawMode mode)
{
dc.DrawText("original image", 0, 0);
dc.DrawBitmap(*gs_bmpNoMask, 0, dc.FromDIP(20), false);
dc.DrawText("with colour mask", 0, dc.FromDIP(100));
dc.DrawBitmap(*gs_bmpWithColMask, 0, dc.FromDIP(120), true);
dc.DrawText("the mask image", 0, dc.FromDIP(200));
dc.DrawBitmap(*gs_bmpMask, 0, dc.FromDIP(220), false);
dc.DrawText("masked image", 0, dc.FromDIP(300));
dc.DrawBitmap(*gs_bmpWithMask, 0, dc.FromDIP(320), true);
int cx = gs_bmpWithColMask->GetWidth(),
cy = gs_bmpWithColMask->GetHeight();
wxMemoryDC memDC;
for ( size_t n = 0; n < WXSIZEOF(rasterOperations); n++ )
{
wxCoord x = dc.FromDIP(120) + dc.FromDIP(150)*(n%4),
y = dc.FromDIP(20) + dc.FromDIP(100)*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - dc.FromDIP(20));
memDC.SelectObject(*gs_bmpWithColMask);
if ( mode == Draw_Stretch )
{
dc.StretchBlit(x, y, cx, cy, &memDC, 0, 0, cx/2, cy/2,
rasterOperations[n].rop, true);
}
else
{
dc.Blit(x, y, cx, cy, &memDC, 0, 0, rasterOperations[n].rop, true);
}
}
}
void MyCanvas::DrawWithLogicalOps(wxDC& dc)
{
static const wxCoord w = dc.FromDIP(60);
static const wxCoord h = dc.FromDIP(60);
// reuse the text colour here
dc.SetPen(wxPen(m_owner->m_colourForeground));
dc.SetBrush(*wxTRANSPARENT_BRUSH);
size_t n;
for ( n = 0; n < WXSIZEOF(rasterOperations); n++ )
{
wxCoord x = dc.FromDIP(20) + dc.FromDIP(150)*(n%4),
y = dc.FromDIP(20) + dc.FromDIP(100)*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - dc.FromDIP(20));
dc.SetLogicalFunction(rasterOperations[n].rop);
dc.DrawRectangle(x, y, w, h);
dc.DrawLine(x, y, x + w, y + h);
dc.DrawLine(x + w, y, x, y + h);
}
// now some filled rectangles
dc.SetBrush(wxBrush(m_owner->m_colourForeground));
for ( n = 0; n < WXSIZEOF(rasterOperations); n++ )
{
wxCoord x = dc.FromDIP(20) + dc.FromDIP(150)*(n%4),
y = dc.FromDIP(500) + dc.FromDIP(100)*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - dc.FromDIP(20));
dc.SetLogicalFunction(rasterOperations[n].rop);
dc.DrawRectangle(x, y, w, h);
}
}
#if wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
void MyCanvas::DrawAlpha(wxDC& dc)
{
const int margin = dc.FromDIP(20);
const int width = dc.FromDIP(180);
wxDouble radius = dc.FromDIP(30);
dc.SetPen( wxPen( wxColour( 128, 0, 0 ), 12 ));
dc.SetBrush(*wxRED_BRUSH);
wxRect r(margin, margin + width * 2 / 3, width, width);
dc.DrawRoundedRectangle( r.x, r.y, r.width, r.width, radius ) ;
dc.SetPen( wxPen( wxColour( 0, 0, 128 ), 12));
dc.SetBrush( wxColour(0, 0, 255, 192) );
r.Offset(width * 4 / 5, -width * 2 / 3);
dc.DrawRoundedRectangle( r.x, r.y, r.width, r.width, radius ) ;
dc.SetPen( wxPen( wxColour( 128, 128, 0 ), 12));
dc.SetBrush( wxBrush( wxColour( 192, 192, 0, 192)));
r.Offset(width * 4 / 5, width / 2);
dc.DrawRoundedRectangle( r.x, r.y, r.width, r.width, radius ) ;
dc.SetPen( *wxTRANSPARENT_PEN ) ;
dc.SetBrush( wxBrush( wxColour(255,255,128,128) ) );
dc.DrawRoundedRectangle( 0 , margin + width / 2 , width * 3 , dc.FromDIP(100) , radius) ;
dc.SetTextBackground( wxColour(160, 192, 160, 160) );
dc.SetTextForeground( wxColour(255, 128, 128, 128) );
dc.SetFont( wxFontInfo(40).Family(wxFONTFAMILY_SWISS).Italic() );
dc.DrawText( "Hello!", dc.FromDIP(120), dc.FromDIP(80) );
}
#endif // wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
#if wxUSE_GRAPHICS_CONTEXT
// modeled along Robin Dunn's GraphicsContext.py sample
void MyCanvas::DrawGraphics(wxGraphicsContext* gc)
{
const int BASE = gc->FromDIP(80.0);
const int BASE2 = BASE / 2;
const int BASE4 = BASE / 4;
wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
gc->SetFont(font,*wxBLACK);
// make a path that contains a circle and some lines, centered at 0,0
wxGraphicsPath path = gc->CreatePath() ;
path.AddCircle( 0, 0, BASE2 );
path.MoveToPoint(0, -BASE2);
path.AddLineToPoint(0, BASE2);
path.MoveToPoint(-BASE2, 0);
path.AddLineToPoint(BASE2, 0);
path.CloseSubpath();
path.AddRectangle(-BASE4, -BASE4/2, BASE2, BASE4);
// Now use that path to demonstrate various capabilities of the graphics context
gc->PushState(); // save current translation/scale/other state
gc->Translate(gc->FromDIP(60), gc->FromDIP(75)); // reposition the context origin
gc->SetPen(wxPen("navy"));
gc->SetBrush(wxBrush("pink"));
for( int i = 0 ; i < 3 ; ++i )
{
wxString label;
switch( i )
{
case 0 :
label = "StrokePath";
break;
case 1 :
label = "FillPath";
break;
case 2 :
label = "DrawPath";
break;
}
wxDouble w, h;
gc->GetTextExtent(label, &w, &h, NULL, NULL);
gc->DrawText(label, -w/2, -BASE2 - h - gc->FromDIP(4));
switch( i )
{
case 0 :
gc->StrokePath(path);
break;
case 1 :
gc->FillPath(path);
break;
case 2 :
gc->DrawPath(path);
break;
}
gc->Translate(2*BASE, 0);
}
gc->PopState(); // restore saved state
gc->PushState(); // save it again
gc->Translate(gc->FromDIP(60), gc->FromDIP(200)); // offset to the lower part of the window
gc->DrawText("Scale", 0, -BASE2);
gc->Translate(0, gc->FromDIP(20));
gc->SetBrush(wxBrush(wxColour(178, 34, 34, 128)));// 128 == half transparent
for( int i = 0 ; i < 8 ; ++i )
{
gc->Scale(1.08, 1.08); // increase scale by 8%
gc->Translate(gc->FromDIP(5), gc->FromDIP(5));
gc->DrawPath(path);
}
gc->PopState(); // restore saved state
gc->PushState(); // save it again
gc->Translate(gc->FromDIP(400), gc->FromDIP(200));
gc->DrawText("Rotate", 0, -BASE2);
// Move the origin over to the next location
gc->Translate(0, gc->FromDIP(75));
// draw our path again, rotating it about the central point,
// and changing colors as we go
for ( int angle = 0 ; angle < 360 ; angle += 30 )
{
gc->PushState(); // save this new current state so we can
// pop back to it at the end of the loop
wxImage::RGBValue val = wxImage::HSVtoRGB(wxImage::HSVValue(angle / 360.0, 1, 1));
gc->SetBrush(wxBrush(wxColour(val.red, val.green, val.blue, 64)));
gc->SetPen(wxPen(wxColour(val.red, val.green, val.blue, 128)));
// use translate to artfully reposition each drawn path
gc->Translate(1.5 * BASE2 * cos(wxDegToRad(angle)),
1.5 * BASE2 * sin(wxDegToRad(angle)));
// use Rotate to rotate the path
gc->Rotate(wxDegToRad(angle));
// now draw it
gc->DrawPath(path);
gc->PopState();
}
gc->PopState();
gc->PushState();
gc->Translate(gc->FromDIP(60), gc->FromDIP(400));
const wxString labelText("Scaled smiley inside a square");
gc->DrawText(labelText, 0, 0);
// Center a bitmap horizontally
wxDouble textWidth;
gc->GetTextExtent(labelText, &textWidth, NULL);
const wxDouble rectSize = gc->FromDIP(100);
wxDouble x0 = (textWidth - rectSize) / 2;
gc->DrawRectangle(x0, BASE2, rectSize, rectSize);
gc->DrawBitmap(m_smile_bmp, x0, BASE2, rectSize, rectSize);
gc->PopState();
// Draw graphics bitmap and its subbitmap
gc->PushState();
gc->Translate(gc->FromDIP(300), gc->FromDIP(400));
gc->DrawText("Smiley as a graphics bitmap", 0, 0);
wxGraphicsBitmap gbmp1 = gc->CreateBitmap(m_smile_bmp);
gc->DrawBitmap(gbmp1, 0, BASE2, gc->FromDIP(50), gc->FromDIP(50));
int bmpw = m_smile_bmp.GetWidth();
int bmph = m_smile_bmp.GetHeight();
wxGraphicsBitmap gbmp2 = gc->CreateSubBitmap(gbmp1, 0, bmph/5, bmpw/2, bmph/2);
gc->DrawBitmap(gbmp2, gc->FromDIP(80), BASE2, gc->FromDIP(50), gc->FromDIP(50)*(bmph/2)/(bmpw/2));
gc->PopState();
}
#endif // wxUSE_GRAPHICS_CONTEXT
void MyCanvas::DrawCircles(wxDC& dc)
{
int x = dc.FromDIP(100),
y = dc.FromDIP(100),
r = dc.FromDIP(20);
dc.SetPen( *wxRED_PEN );
dc.SetBrush( *wxGREEN_BRUSH );
dc.DrawText("Some circles", 0, y);
dc.DrawCircle(x, y, r);
dc.DrawCircle(x + 2*r, y, r);
dc.DrawCircle(x + 4*r, y, r);
y += 2*r;
dc.DrawText("And ellipses", 0, y);
dc.DrawEllipse(x - r, y, 2*r, r);
dc.DrawEllipse(x + r, y, 2*r, r);
dc.DrawEllipse(x + 3*r, y, 2*r, r);
y += 2*r;
dc.DrawText("And arcs", 0, y);
dc.DrawArc(x - r, y, x + r, y, x, y);
dc.DrawArc(x + 4*r, y, x + 2*r, y, x + 3*r, y);
dc.DrawArc(x + 5*r, y, x + 5*r, y, x + 6*r, y);
y += 2*r;
dc.DrawEllipticArc(x - r, y, 2*r, r, 0, 90);
dc.DrawEllipticArc(x + r, y, 2*r, r, 90, 180);
dc.DrawEllipticArc(x + 3*r, y, 2*r, r, 180, 270);
dc.DrawEllipticArc(x + 5*r, y, 2*r, r, 270, 360);
// same as above, just transparent brush
dc.SetPen( *wxRED_PEN );
dc.SetBrush( *wxTRANSPARENT_BRUSH );
y += 2*r;
dc.DrawText("Some circles", 0, y);
dc.DrawCircle(x, y, r);
dc.DrawCircle(x + 2*r, y, r);
dc.DrawCircle(x + 4*r, y, r);
y += 2*r;
dc.DrawText("And ellipses", 0, y);
dc.DrawEllipse(x - r, y, 2*r, r);
dc.DrawEllipse(x + r, y, 2*r, r);
dc.DrawEllipse(x + 3*r, y, 2*r, r);
y += 2*r;
dc.DrawText("And arcs", 0, y);
dc.DrawArc(x - r, y, x + r, y, x, y);
dc.DrawArc(x + 4*r, y, x + 2*r, y, x + 3*r, y);
dc.DrawArc(x + 5*r, y, x + 5*r, y, x + 6*r, y);
y += 2*r;
dc.DrawEllipticArc(x - r, y, 2*r, r, 0, 90);
dc.DrawEllipticArc(x + r, y, 2*r, r, 90, 180);
dc.DrawEllipticArc(x + 3*r, y, 2*r, r, 180, 270);
dc.DrawEllipticArc(x + 5*r, y, 2*r, r, 270, 360);
}
void MyCanvas::DrawSplines(wxDC& dc)
{
#if wxUSE_SPLINES
dc.DrawText("Some splines", dc.FromDIP(10), dc.FromDIP(5));
// values are hardcoded rather than randomly generated
// so the output can be compared between native
// implementations on platforms with different random
// generators
const int R = dc.FromDIP(300);
const wxPoint center( R + dc.FromDIP(20), R + dc.FromDIP(20) );
const int angles[7] = { 0, 10, 33, 77, 13, 145, 90 };
const int radii[5] = { 100 , 59, 85, 33, 90 };
const int numPoints = 200;
wxPoint pts[numPoints];
// background spline calculation
unsigned int radius_pos = 0;
unsigned int angle_pos = 0;
int angle = 0;
for ( int i = 0; i < numPoints; i++ )
{
angle += angles[ angle_pos ];
int r = R * radii[ radius_pos ] / 100;
pts[ i ].x = center.x + (wxCoord)( r * cos(wxDegToRad(angle)) );
pts[ i ].y = center.y + (wxCoord)( r * sin(wxDegToRad(angle)) );
angle_pos++;
if ( angle_pos >= WXSIZEOF(angles) ) angle_pos = 0;
radius_pos++;
if ( radius_pos >= WXSIZEOF(radii) ) radius_pos = 0;
}
// background spline drawing
dc.SetPen(*wxRED_PEN);
dc.DrawSpline(WXSIZEOF(pts), pts);
// less detailed spline calculation
wxPoint letters[4][5];
// w
letters[0][0] = wxPoint( 0,1); // O O
letters[0][1] = wxPoint( 1,3); // * *
letters[0][2] = wxPoint( 2,2); // * O *
letters[0][3] = wxPoint( 3,3); // * * * *
letters[0][4] = wxPoint( 4,1); // O O
// x1
letters[1][0] = wxPoint( 5,1); // O*O
letters[1][1] = wxPoint( 6,1); // *
letters[1][2] = wxPoint( 7,2); // O
letters[1][3] = wxPoint( 8,3); // *
letters[1][4] = wxPoint( 9,3); // O*O
// x2
letters[2][0] = wxPoint( 5,3); // O*O
letters[2][1] = wxPoint( 6,3); // *
letters[2][2] = wxPoint( 7,2); // O
letters[2][3] = wxPoint( 8,1); // *
letters[2][4] = wxPoint( 9,1); // O*O
// W
letters[3][0] = wxPoint(10,0); // O O
letters[3][1] = wxPoint(11,3); // * *
letters[3][2] = wxPoint(12,1); // * O *
letters[3][3] = wxPoint(13,3); // * * * *
letters[3][4] = wxPoint(14,0); // O O
const int dx = 2 * R / letters[3][4].x;
const int h[4] = { -R/2, 0, R/4, R/2 };
for ( int m = 0; m < 4; m++ )
{
for ( int n = 0; n < 5; n++ )
{
letters[m][n].x = center.x - R + letters[m][n].x * dx;
letters[m][n].y = center.y + h[ letters[m][n].y ];
}
dc.SetPen( wxPen( *wxBLUE, 1, wxPENSTYLE_DOT) );
dc.DrawLines(5, letters[m]);
dc.SetPen( wxPen( *wxBLACK, 4) );
dc.DrawSpline(5, letters[m]);
}
#else
dc.DrawText("Splines not supported.", 10, 5);
#endif
}
void MyCanvas::DrawGradients(wxDC& dc)
{
static const int TEXT_HEIGHT = dc.GetCharHeight();
// LHS: linear
wxRect r(dc.FromDIP(10), dc.FromDIP(10), dc.FromDIP(50), dc.FromDIP(50));
dc.DrawText("wxRIGHT", r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxRIGHT);
r.Offset(0, r.height + dc.FromDIP(10));
dc.DrawText("wxLEFT", r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxLEFT);
r.Offset(0, r.height + dc.FromDIP(10));
dc.DrawText("wxDOWN", r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxDOWN);
r.Offset(0, r.height + dc.FromDIP(10));
dc.DrawText("wxUP", r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxUP);
wxRect gfr = wxRect(r);
// RHS: concentric
r = wxRect(dc.FromDIP(200), dc.FromDIP(10), dc.FromDIP(50), dc.FromDIP(50));
dc.DrawText("Blue inside", r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillConcentric(r, *wxBLUE, *wxWHITE);
r.Offset(0, r.height + dc.FromDIP(10));
dc.DrawText("White inside", r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillConcentric(r, *wxWHITE, *wxBLUE);
r.Offset(0, r.height + dc.FromDIP(10));
dc.DrawText("Blue in top left corner", r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillConcentric(r, *wxBLUE, *wxWHITE, wxPoint(0, 0));
r.Offset(0, r.height + dc.FromDIP(10));
dc.DrawText("Blue in bottom right corner", r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillConcentric(r, *wxBLUE, *wxWHITE, wxPoint(r.width, r.height));
// check that the area filled by the gradient is exactly the interior of
// the rectangle
r.x = dc.FromDIP(350);
r.y = dc.FromDIP(30);
dc.DrawText("The interior should be filled but", r.x, r.y);
r.y += TEXT_HEIGHT;
dc.DrawText(" the red border should remain visible:", r.x, r.y);
r.y += TEXT_HEIGHT;
r.width =
r.height = dc.FromDIP(50);
wxRect r2 = r;
r2.x += dc.FromDIP(60);
wxRect r3 = r;
r3.y += dc.FromDIP(60);
wxRect r4 = r2;
r4.y += dc.FromDIP(60);
dc.SetPen(*wxRED_PEN);
dc.DrawRectangle(r);
r.Deflate(1);
dc.GradientFillLinear(r, *wxGREEN, *wxBLACK, wxNORTH);
dc.DrawRectangle(r2);
r2.Deflate(1);
dc.GradientFillLinear(r2, *wxBLACK, *wxGREEN, wxSOUTH);
dc.DrawRectangle(r3);
r3.Deflate(1);
dc.GradientFillLinear(r3, *wxGREEN, *wxBLACK, wxEAST);
dc.DrawRectangle(r4);
r4.Deflate(1);
dc.GradientFillLinear(r4, *wxBLACK, *wxGREEN, wxWEST);
#if wxUSE_GRAPHICS_CONTEXT
if (m_renderer)
{
wxGraphicsContext *gc = dc.GetGraphicsContext();
wxGraphicsPath pth;
wxGraphicsGradientStops stops;
double boxX, boxY, boxWidth, boxHeight;
gfr.Offset(0, gfr.height + gc->FromDIP(10));
dc.DrawText("Linear Gradient with Stops", gfr.x, gfr.y);
gfr.Offset(0, TEXT_HEIGHT);
stops = wxGraphicsGradientStops(*wxRED, *wxBLUE);
stops.Add(wxColour(255,255,0), 0.33f);
stops.Add(*wxGREEN, 0.67f);
gc->SetBrush(gc->CreateLinearGradientBrush(gfr.x, gfr.y,
gfr.x + gfr.width, gfr.y + gfr.height,
stops));
pth = gc->CreatePath();
pth.MoveToPoint(gfr.x,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y+gfr.height);
pth.AddLineToPoint(gfr.x,gfr.y+gfr.height);
pth.CloseSubpath();
gc->FillPath(pth);
pth.GetBox(&boxX, &boxY, &boxWidth, &boxHeight);
dc.CalcBoundingBox(wxRound(boxX), wxRound(boxY));
dc.CalcBoundingBox(wxRound(boxX+boxWidth), wxRound(boxY+boxHeight));
wxGraphicsGradientStops simpleStops(*wxRED, *wxBLUE);
gfr.Offset(0, gfr.height + gc->FromDIP(10));
dc.DrawText("Radial Gradient from Red to Blue without intermediary Stops",
gfr.x, gfr.y);
gfr.Offset(0, TEXT_HEIGHT);
gc->SetBrush(gc->CreateRadialGradientBrush(gfr.x + gfr.width / 2,
gfr.y + gfr.height / 2,
gfr.x + gfr.width / 2,
gfr.y + gfr.height / 2,
gfr.width / 2,
simpleStops));
pth = gc->CreatePath();
pth.MoveToPoint(gfr.x,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y+gfr.height);
pth.AddLineToPoint(gfr.x,gfr.y+gfr.height);
pth.CloseSubpath();
gc->FillPath(pth);
pth.GetBox(&boxX, &boxY, &boxWidth, &boxHeight);
dc.CalcBoundingBox(wxRound(boxX), wxRound(boxY));
dc.CalcBoundingBox(wxRound(boxX+boxWidth), wxRound(boxY+boxHeight));
gfr.Offset(0, gfr.height + gc->FromDIP(10));
dc.DrawText("Radial Gradient from Red to Blue with Yellow and Green Stops",
gfr.x, gfr.y);
gfr.Offset(0, TEXT_HEIGHT);
gc->SetBrush(gc->CreateRadialGradientBrush(gfr.x + gfr.width / 2,
gfr.y + gfr.height / 2,
gfr.x + gfr.width / 2,
gfr.y + gfr.height / 2,
gfr.width / 2,
stops));
pth = gc->CreatePath();
pth.MoveToPoint(gfr.x,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y+gfr.height);
pth.AddLineToPoint(gfr.x,gfr.y+gfr.height);
pth.CloseSubpath();
gc->FillPath(pth);
pth.GetBox(&boxX, &boxY, &boxWidth, &boxHeight);
dc.CalcBoundingBox(wxRound(boxX), wxRound(boxY));
dc.CalcBoundingBox(wxRound(boxX+boxWidth), wxRound(boxY+boxHeight));
gfr.Offset(0, gfr.height + gc->FromDIP(10));
dc.DrawText("Linear Gradient with Stops and Gaps", gfr.x, gfr.y);
gfr.Offset(0, TEXT_HEIGHT);
stops = wxGraphicsGradientStops(*wxRED, *wxBLUE);
stops.Add(wxColour(255,255,0), 0.33f);
stops.Add(wxTransparentColour, 0.33f);
stops.Add(wxTransparentColour, 0.67f);
stops.Add(*wxGREEN, 0.67f);
gc->SetBrush(gc->CreateLinearGradientBrush(gfr.x, gfr.y + gfr.height,
gfr.x + gfr.width, gfr.y,
stops));
pth = gc->CreatePath();
pth.MoveToPoint(gfr.x,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y+gfr.height);
pth.AddLineToPoint(gfr.x,gfr.y+gfr.height);
pth.CloseSubpath();
gc->FillPath(pth);
pth.GetBox(&boxX, &boxY, &boxWidth, &boxHeight);
dc.CalcBoundingBox(wxRound(boxX), wxRound(boxY));
dc.CalcBoundingBox(wxRound(boxX+boxWidth), wxRound(boxY+boxHeight));
gfr.Offset(0, gfr.height + gc->FromDIP(10));
dc.DrawText("Radial Gradient with Stops and Gaps", gfr.x, gfr.y);
gfr.Offset(0, TEXT_HEIGHT);
gc->SetBrush(gc->CreateRadialGradientBrush(gfr.x + gfr.width / 2,
gfr.y + gfr.height / 2,
gfr.x + gfr.width / 2,
gfr.y + gfr.height / 2,
gfr.width / 2,
stops));
pth = gc->CreatePath();
pth.MoveToPoint(gfr.x,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y+gfr.height);
pth.AddLineToPoint(gfr.x,gfr.y+gfr.height);
pth.CloseSubpath();
gc->FillPath(pth);
pth.GetBox(&boxX, &boxY, &boxWidth, &boxHeight);
dc.CalcBoundingBox(wxRound(boxX), wxRound(boxY));
dc.CalcBoundingBox(wxRound(boxX+boxWidth), wxRound(boxY+boxHeight));
gfr.Offset(0, gfr.height + gc->FromDIP(10));
dc.DrawText("Gradients with Stops and Transparency", gfr.x, gfr.y);
gfr.Offset(0, TEXT_HEIGHT);
stops = wxGraphicsGradientStops(*wxRED, wxTransparentColour);
stops.Add(*wxRED, 0.33f);
stops.Add(wxTransparentColour, 0.33f);
stops.Add(wxTransparentColour, 0.67f);
stops.Add(*wxBLUE, 0.67f);
stops.Add(*wxBLUE, 1.0f);
pth = gc->CreatePath();
pth.MoveToPoint(gfr.x,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width,gfr.y+gfr.height);
pth.AddLineToPoint(gfr.x,gfr.y+gfr.height);
pth.CloseSubpath();
gc->SetBrush(gc->CreateRadialGradientBrush(gfr.x + gfr.width / 2,
gfr.y + gfr.height / 2,
gfr.x + gfr.width / 2,
gfr.y + gfr.height / 2,
gfr.width / 2,
stops));
gc->FillPath(pth);
stops = wxGraphicsGradientStops(wxColour(255,0,0, 128), wxColour(0,0,255, 128));
stops.Add(wxColour(255,255,0,128), 0.33f);
stops.Add(wxColour(0,255,0,128), 0.67f);
gc->SetBrush(gc->CreateLinearGradientBrush(gfr.x, gfr.y,
gfr.x + gfr.width, gfr.y,
stops));
gc->FillPath(pth);
pth.GetBox(&boxX, &boxY, &boxWidth, &boxHeight);
dc.CalcBoundingBox(wxRound(boxX), wxRound(boxY));
dc.CalcBoundingBox(wxRound(boxX+boxWidth), wxRound(boxY+boxHeight));
gfr.Offset(0, gfr.height + gc->FromDIP(10));
dc.DrawText("Stroked path with a gradient pen", gfr.x, gfr.y);
gfr.Offset(0, TEXT_HEIGHT);
pth = gc->CreatePath();
pth.MoveToPoint(gfr.x + gfr.width/2, gfr.y);
pth.AddLineToPoint(gfr.x + gfr.width, gfr.y + gfr.height/2);
pth.AddLineToPoint(gfr.x + gfr.width/2, gfr.y + gfr.height);
pth.AddLineToPoint(gfr.x, gfr.y + gfr.height/2);
pth.CloseSubpath();
stops = wxGraphicsGradientStops(*wxRED, *wxBLUE);
stops.Add(wxColour(255,255,0), 0.33f);
stops.Add(*wxGREEN, 0.67f);
wxGraphicsPen pen = gc->CreatePen(
wxGraphicsPenInfo(wxColour(0,0,0)).Width(6).Join(wxJOIN_BEVEL).LinearGradient(
gfr.x + gfr.width/2, gfr.y,
gfr.x + gfr.width/2, gfr.y + gfr.height,
stops));
gc->SetPen(pen);
gc->StrokePath(pth);
}
#endif // wxUSE_GRAPHICS_CONTEXT
}
void MyCanvas::DrawSystemColours(wxDC& dc)
{
wxFont mono(wxFontInfo().Family(wxFONTFAMILY_TELETYPE));
wxSize textSize;
{
wxDCFontChanger setMono(dc, mono);
textSize = dc.GetTextExtent("#01234567");
}
int lineHeight = textSize.GetHeight();
wxCoord x(FromDIP(10));
wxRect r(textSize.GetWidth() + x, x, dc.FromDIP(100), lineHeight);
wxString title = "System colours";
const wxSystemAppearance appearance = wxSystemSettings::GetAppearance();
const wxString appearanceName = appearance.GetName();
if ( !appearanceName.empty() )
title += wxString::Format(" for \"%s\"", appearanceName);
if ( appearance.IsDark() )
title += " (using dark system theme)";
dc.DrawText(title, x, r.y);
r.y += 2*lineHeight;
dc.DrawText(wxString::Format("Window background is %s",
appearance.IsUsingDarkBackground() ? "dark"
: "light"),
x, r.y);
r.y += 3*lineHeight;
dc.SetPen(*wxTRANSPARENT_PEN);
static const struct {
wxSystemColour index;
const char* name;
} sysColours[] =
{
{ wxSYS_COLOUR_3DDKSHADOW, "wxSYS_COLOUR_3DDKSHADOW" },
{ wxSYS_COLOUR_3DLIGHT, "wxSYS_COLOUR_3DLIGHT" },
{ wxSYS_COLOUR_ACTIVEBORDER, "wxSYS_COLOUR_ACTIVEBORDER" },
{ wxSYS_COLOUR_ACTIVECAPTION, "wxSYS_COLOUR_ACTIVECAPTION" },
{ wxSYS_COLOUR_APPWORKSPACE, "wxSYS_COLOUR_APPWORKSPACE" },
{ wxSYS_COLOUR_BTNFACE, "wxSYS_COLOUR_BTNFACE" },
{ wxSYS_COLOUR_BTNHIGHLIGHT, "wxSYS_COLOUR_BTNHIGHLIGHT" },
{ wxSYS_COLOUR_BTNSHADOW, "wxSYS_COLOUR_BTNSHADOW" },
{ wxSYS_COLOUR_BTNTEXT, "wxSYS_COLOUR_BTNTEXT" },
{ wxSYS_COLOUR_CAPTIONTEXT, "wxSYS_COLOUR_CAPTIONTEXT" },
{ wxSYS_COLOUR_DESKTOP, "wxSYS_COLOUR_DESKTOP" },
{ wxSYS_COLOUR_GRADIENTACTIVECAPTION, "wxSYS_COLOUR_GRADIENTACTIVECAPTION" },
{ wxSYS_COLOUR_GRADIENTINACTIVECAPTION, "wxSYS_COLOUR_GRADIENTINACTIVECAPTION" },
{ wxSYS_COLOUR_GRAYTEXT, "wxSYS_COLOUR_GRAYTEXT" },
{ wxSYS_COLOUR_HIGHLIGHTTEXT, "wxSYS_COLOUR_HIGHLIGHTTEXT" },
{ wxSYS_COLOUR_HIGHLIGHT, "wxSYS_COLOUR_HIGHLIGHT" },
{ wxSYS_COLOUR_HOTLIGHT, "wxSYS_COLOUR_HOTLIGHT" },
{ wxSYS_COLOUR_INACTIVEBORDER, "wxSYS_COLOUR_INACTIVEBORDER" },
{ wxSYS_COLOUR_INACTIVECAPTIONTEXT, "wxSYS_COLOUR_INACTIVECAPTIONTEXT" },
{ wxSYS_COLOUR_INACTIVECAPTION, "wxSYS_COLOUR_INACTIVECAPTION" },
{ wxSYS_COLOUR_INFOBK, "wxSYS_COLOUR_INFOBK" },
{ wxSYS_COLOUR_INFOTEXT, "wxSYS_COLOUR_INFOTEXT" },
{ wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT, "wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT" },
{ wxSYS_COLOUR_LISTBOXTEXT, "wxSYS_COLOUR_LISTBOXTEXT" },
{ wxSYS_COLOUR_LISTBOX, "wxSYS_COLOUR_LISTBOX" },
{ wxSYS_COLOUR_MENUBAR, "wxSYS_COLOUR_MENUBAR" },
{ wxSYS_COLOUR_MENUHILIGHT, "wxSYS_COLOUR_MENUHILIGHT" },
{ wxSYS_COLOUR_MENUTEXT, "wxSYS_COLOUR_MENUTEXT" },
{ wxSYS_COLOUR_MENU, "wxSYS_COLOUR_MENU" },
{ wxSYS_COLOUR_SCROLLBAR, "wxSYS_COLOUR_SCROLLBAR" },
{ wxSYS_COLOUR_WINDOWFRAME, "wxSYS_COLOUR_WINDOWFRAME" },
{ wxSYS_COLOUR_WINDOWTEXT, "wxSYS_COLOUR_WINDOWTEXT" },
{ wxSYS_COLOUR_WINDOW, "wxSYS_COLOUR_WINDOW" }
};
for (int i = 0; i < wxSYS_COLOUR_MAX; i++)
{
wxString colourName(sysColours[i].name);
wxColour c(wxSystemSettings::GetColour(sysColours[i].index));
{
wxDCFontChanger setMono(dc, mono);
dc.DrawText(c.GetAsString(wxC2S_HTML_SYNTAX), x, r.y);
}
dc.SetBrush(wxBrush(c));
dc.DrawRectangle(r);
dc.DrawText(colourName, r.GetRight() + x, r.y);
r.y += lineHeight;
}
}
void MyCanvas::DrawRegions(wxDC& dc)
{
dc.DrawText("You should see a red rect partly covered by a cyan one "
"on the left", dc.FromDIP(10), dc.FromDIP(5));
dc.DrawText("and 5 smileys from which 4 are partially clipped on the right",
dc.FromDIP(10), dc.FromDIP(5) + dc.GetCharHeight());
dc.DrawText("The second copy should be identical but right part of it "
"should be offset by 10 pixels.",
dc.FromDIP(10), dc.FromDIP(5) + 2*dc.GetCharHeight());
DrawRegionsHelper(dc, dc.FromDIP(10), true);
DrawRegionsHelper(dc, dc.FromDIP(350), false);
}
void MyCanvas::DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime)
{
wxCoord y = dc.FromDIP(100);
dc.DestroyClippingRegion();
dc.SetBrush( *wxWHITE_BRUSH );
dc.SetPen( *wxTRANSPARENT_PEN );
dc.DrawRectangle( x, y, dc.FromDIP(310), dc.FromDIP(310) );
dc.SetClippingRegion( x + dc.FromDIP(10), y + dc.FromDIP(10), dc.FromDIP(100), dc.FromDIP(270) );
dc.SetBrush( *wxRED_BRUSH );
dc.DrawRectangle( x, y, dc.FromDIP(310), dc.FromDIP(310) );
dc.SetClippingRegion( x + dc.FromDIP(10), y + dc.FromDIP(10), dc.FromDIP(100), dc.FromDIP(100) );
dc.SetBrush( *wxCYAN_BRUSH );
dc.DrawRectangle( x, y, dc.FromDIP(310), dc.FromDIP(310) );
dc.DestroyClippingRegion();
wxRegion region(x + dc.FromDIP(110), y + dc.FromDIP(20), dc.FromDIP(100), dc.FromDIP(270));
#if !defined(__WXMOTIF__)
if ( !firstTime )
region.Offset(dc.FromDIP(10), dc.FromDIP(10));
#endif
dc.SetDeviceClippingRegion(region);
dc.SetBrush( *wxGREY_BRUSH );
dc.DrawRectangle( x, y, dc.FromDIP(310), dc.FromDIP(310) );
if (m_smile_bmp.IsOk())
{
dc.DrawBitmap( m_smile_bmp, x + dc.FromDIP(150), y + dc.FromDIP(150), true );
dc.DrawBitmap( m_smile_bmp, x + dc.FromDIP(130), y + dc.FromDIP(10), true );
dc.DrawBitmap( m_smile_bmp, x + dc.FromDIP(130), y + dc.FromDIP(280), true );
dc.DrawBitmap( m_smile_bmp, x + dc.FromDIP(100), y + dc.FromDIP(70), true );
dc.DrawBitmap( m_smile_bmp, x + dc.FromDIP(200), y + dc.FromDIP(70), true );
}
}
wxSize MyCanvas::GetDIPDrawingSize() const
{
return m_sizeDIP;
}
void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event))
{
if ( m_useBuffer )
{
wxBufferedPaintDC bpdc(this);
Draw(bpdc);
}
else
{
wxPaintDC pdc(this);
Draw(pdc);
}
}
void MyCanvas::Draw(wxDC& pdc)
{
#if wxUSE_GRAPHICS_CONTEXT
wxGCDC gdc;
if ( m_renderer )
{
wxGraphicsContext* context;
if ( wxPaintDC *paintdc = wxDynamicCast(&pdc, wxPaintDC) )
{
context = m_renderer->CreateContext(*paintdc);
}
else if ( wxMemoryDC *memdc = wxDynamicCast(&pdc, wxMemoryDC) )
{
context = m_renderer->CreateContext(*memdc);
}
#if wxUSE_METAFILE && defined(wxMETAFILE_IS_ENH)
else if ( wxMetafileDC *metadc = wxDynamicCast(&pdc, wxMetafileDC) )
{
context = m_renderer->CreateContext(*metadc);
}
#endif
else
{
wxFAIL_MSG( "Unknown wxDC kind" );
return;
}
context->SetAntialiasMode(m_useAntiAliasing ? wxANTIALIAS_DEFAULT : wxANTIALIAS_NONE);
gdc.SetBackground(GetBackgroundColour());
gdc.SetGraphicsContext(context);
}
wxDC &dc = m_renderer ? static_cast<wxDC&>(gdc) : pdc;
#else
wxDC &dc = pdc ;
#endif
// Adjust scrolled contents for screen drawing operations only.
if ( wxDynamicCast(&pdc, wxBufferedPaintDC) ||
wxDynamicCast(&pdc, wxPaintDC) )
{
PrepareDC(dc);
}
m_owner->PrepareDC(dc);
dc.SetBackgroundMode( m_owner->m_backgroundMode );
if ( m_owner->m_backgroundBrush.IsOk() )
dc.SetBackground( m_owner->m_backgroundBrush );
if ( m_owner->m_colourForeground.IsOk() )
dc.SetTextForeground( m_owner->m_colourForeground );
if ( m_owner->m_colourBackground.IsOk() )
dc.SetTextBackground( m_owner->m_colourBackground );
if ( m_owner->m_textureBackground) {
if ( ! m_owner->m_backgroundBrush.IsOk() ) {
dc.SetBackground(wxBrush(wxColour(0, 128, 0)));
}
}
if ( m_clip )
{
dc.SetClippingRegion(wxPoint(dc.FromDIP(100), dc.FromDIP(100)),
wxSize(dc.FromDIP(100), dc.FromDIP(100)));
}
dc.Clear();
if ( m_owner->m_textureBackground )
{
dc.SetPen(*wxMEDIUM_GREY_PEN);
for ( int i = 0; i < 200; i++ )
dc.DrawLine(0, dc.FromDIP(i*10), dc.FromDIP(i*10), 0);
}
switch ( m_show )
{
case File_ShowDefault:
DrawDefault(dc);
break;
case File_ShowCircles:
DrawCircles(dc);
break;
case File_ShowSplines:
DrawSplines(dc);
break;
case File_ShowRegions:
DrawRegions(dc);
break;
case File_ShowText:
DrawText(dc);
break;
case File_ShowLines:
DrawTestLines( 0, 100, 0, dc );
DrawTestLines( 0, 320, 1, dc );
DrawTestLines( 0, 540, 2, dc );
DrawTestLines( 0, 760, 6, dc );
DrawCrossHair( 0, 0, 400, 90, dc);
break;
case File_ShowBrushes:
DrawTestBrushes(dc);
break;
case File_ShowPolygons:
DrawTestPoly(dc);
break;
case File_ShowMask:
DrawImages(dc, Draw_Normal);
break;
case File_ShowMaskStretch:
DrawImages(dc, Draw_Stretch);
break;
case File_ShowOps:
DrawWithLogicalOps(dc);
break;
#if wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
case File_ShowAlpha:
DrawAlpha(dc);
break;
#endif // wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
#if wxUSE_GRAPHICS_CONTEXT
case File_ShowGraphics:
DrawGraphics(gdc.GetGraphicsContext());
break;
#endif
case File_ShowGradients:
DrawGradients(dc);
break;
case File_ShowSystemColours:
DrawSystemColours(dc);
break;
default:
break;
}
// For drawing with raw wxGraphicsContext
// there is no bounding box to obtain.
if ( m_showBBox
#if wxUSE_GRAPHICS_CONTEXT
&& m_show != File_ShowGraphics
#endif // wxUSE_GRAPHICS_CONTEXT
)
{
dc.SetPen(wxPen(wxColor(0, 128, 0), 1, wxPENSTYLE_DOT));
dc.SetBrush(*wxTRANSPARENT_BRUSH);
dc.DrawRectangle(dc.MinX(), dc.MinY(), dc.MaxX()-dc.MinX()+1, dc.MaxY()-dc.MinY()+1);
}
// Adjust drawing area dimensions only if screen drawing is invoked.
if ( wxDynamicCast(&pdc, wxBufferedPaintDC) ||
wxDynamicCast(&pdc, wxPaintDC) )
{
wxCoord x0, y0;
dc.GetDeviceOrigin(&x0, &y0);
m_sizeDIP.x = dc.ToDIP(dc.LogicalToDeviceX(dc.MaxX()) - x0) + 1;
m_sizeDIP.y = dc.ToDIP(dc.LogicalToDeviceY(dc.MaxY()) - y0) + 1;
}
}
void MyCanvas::OnMouseMove(wxMouseEvent &event)
{
#if wxUSE_STATUSBAR
{
wxClientDC dc(this);
PrepareDC(dc);
m_owner->PrepareDC(dc);
wxPoint pos = dc.DeviceToLogical(event.GetPosition());
wxPoint dipPos = dc.ToDIP(pos);
wxString str;
str.Printf( "Mouse position: %d,%d", pos.x, pos.y );
if ( pos != dipPos )
str += wxString::Format("; DIP position: %d,%d", dipPos.x, dipPos.y);
m_owner->SetStatusText( str );
}
if ( m_rubberBand )
{
int x,y, xx, yy ;
event.GetPosition(&x,&y);
CalcUnscrolledPosition( x, y, &xx, &yy );
m_currentpoint = wxPoint( xx , yy ) ;
wxRect newrect ( m_anchorpoint , m_currentpoint ) ;
wxClientDC dc( this ) ;
PrepareDC( dc ) ;
wxDCOverlay overlaydc( m_overlay, &dc );
overlaydc.Clear();
#ifdef __WXMAC__
dc.SetPen( *wxGREY_PEN );
dc.SetBrush( wxColour( 192,192,192,64 ) );
#else
dc.SetPen( wxPen( *wxLIGHT_GREY, 2 ) );
dc.SetBrush( *wxTRANSPARENT_BRUSH );
#endif
dc.DrawRectangle( newrect );
}
#else
wxUnusedVar(event);
#endif // wxUSE_STATUSBAR
}
void MyCanvas::OnMouseDown(wxMouseEvent &event)
{
int x,y,xx,yy ;
event.GetPosition(&x,&y);
CalcUnscrolledPosition( x, y, &xx, &yy );
m_anchorpoint = wxPoint( xx , yy ) ;
m_currentpoint = m_anchorpoint ;
m_rubberBand = true ;
CaptureMouse() ;
}
void MyCanvas::OnMouseUp(wxMouseEvent &event)
{
if ( m_rubberBand )
{
ReleaseMouse();
{
wxClientDC dc( this );
PrepareDC( dc );
wxDCOverlay overlaydc( m_overlay, &dc );
overlaydc.Clear();
}
m_overlay.Reset();
m_rubberBand = false;
wxPoint endpoint = CalcUnscrolledPosition(event.GetPosition());
// Don't pop up the message box if nothing was actually selected.
if ( endpoint != m_anchorpoint )
{
wxLogMessage("Selected rectangle from (%d, %d) to (%d, %d)",
m_anchorpoint.x, m_anchorpoint.y,
endpoint.x, endpoint.y);
}
}
}
#if wxUSE_GRAPHICS_CONTEXT
void MyCanvas::UseGraphicRenderer(wxGraphicsRenderer* renderer)
{
m_renderer = renderer;
if (renderer)
{
int major, minor, micro;
renderer->GetVersion(&major, &minor, &micro);
wxString str = wxString::Format("Graphics renderer: %s %i.%i.%i",
renderer->GetName(), major, minor, micro);
m_owner->SetStatusText(str, 1);
}
else
{
m_owner->SetStatusText(wxEmptyString, 1);
}
Refresh();
}
#endif // wxUSE_GRAPHICS_CONTEXT
#if wxUSE_DC_TRANSFORM_MATRIX
#include "wx/valnum.h"
class TransformDataDialog : public wxDialog
{
public:
TransformDataDialog(wxWindow* parent, wxDouble dx, wxDouble dy, wxDouble scx, wxDouble scy, wxDouble rotAngle)
: wxDialog(parent, wxID_ANY, "Affine transformation parameters")
, m_dx(dx)
, m_dy(dy)
, m_scx(scx)
, m_scy(scy)
, m_rotAngle(rotAngle)
{
wxBoxSizer* sizer = new wxBoxSizer(wxVERTICAL);
const int border = wxSizerFlags::GetDefaultBorder();
wxFlexGridSizer* paramSizer = new wxFlexGridSizer(2, wxSize(border, border));
paramSizer->Add(new wxStaticText(this, wxID_ANY, "Translation X:"), wxSizerFlags().CentreVertical());
wxFloatingPointValidator<wxDouble> val_dx(1, &m_dx, wxNUM_VAL_NO_TRAILING_ZEROES);
paramSizer->Add(new wxTextCtrl(this, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, 0, val_dx), wxSizerFlags().CentreVertical());
paramSizer->Add(new wxStaticText(this, wxID_ANY, "Translation Y:"), wxSizerFlags().CentreVertical());
wxFloatingPointValidator<wxDouble> val_dy(1, &m_dy, wxNUM_VAL_NO_TRAILING_ZEROES);
paramSizer->Add(new wxTextCtrl(this, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, 0, val_dy), wxSizerFlags().CentreVertical());
paramSizer->Add(new wxStaticText(this, wxID_ANY, "Scale X (0.2 - 5):"), wxSizerFlags().CentreVertical());
wxFloatingPointValidator<wxDouble> val_scx(2, &m_scx, wxNUM_VAL_NO_TRAILING_ZEROES);
paramSizer->Add(new wxTextCtrl(this, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, 0, val_scx), wxSizerFlags().CentreVertical());
paramSizer->Add(new wxStaticText(this, wxID_ANY, "Scale Y (0.2 - 5):"), wxSizerFlags().CentreVertical());
wxFloatingPointValidator<wxDouble> val_scy(2, &m_scy, wxNUM_VAL_NO_TRAILING_ZEROES);
paramSizer->Add(new wxTextCtrl(this, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, 0, val_scy), wxSizerFlags().CentreVertical());
paramSizer->Add(new wxStaticText(this, wxID_ANY, "Rotation angle (deg):"), wxSizerFlags().CentreVertical());
wxFloatingPointValidator<wxDouble> val_rot(1, &m_rotAngle, wxNUM_VAL_NO_TRAILING_ZEROES);
paramSizer->Add(new wxTextCtrl(this, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, 0, val_rot), wxSizerFlags().CentreVertical());
sizer->Add(paramSizer, wxSizerFlags().DoubleBorder());
wxSizer *btnSizer = CreateSeparatedButtonSizer(wxOK | wxCANCEL);
sizer->Add(btnSizer, wxSizerFlags().Expand().Border());
SetSizerAndFit(sizer);
}
virtual bool TransferDataFromWindow() wxOVERRIDE
{
if ( !wxDialog::TransferDataFromWindow() )
return false;
if ( m_scx < 0.2 || m_scx > 5.0 || m_scy < 0.2 || m_scy > 5.0 )
{
if ( !wxValidator::IsSilent() )
wxBell();
return false;
}
return true;
}
void GetTransformationData(wxDouble* dx, wxDouble* dy, wxDouble* scx, wxDouble* scy, wxDouble* rotAngle) const
{
if ( dx )
*dx = m_dx;
if ( dy )
*dy = m_dy;
if ( scx )
*scx = m_scx;
if ( scy )
*scy = m_scy;
if ( rotAngle )
*rotAngle = m_rotAngle;
}
private:
wxDouble m_dx;
wxDouble m_dy;
wxDouble m_scx;
wxDouble m_scy;
wxDouble m_rotAngle;
};
#endif // wxUSE_DC_TRANSFORM_MATRIX
// ----------------------------------------------------------------------------
// MyFrame
// ----------------------------------------------------------------------------
// the event tables connect the wxWidgets events with the functions (event
// handlers) which process them. It can be also done at run-time, but for the
// simple menu events like this the static method is much simpler.
wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU (File_Quit, MyFrame::OnQuit)
EVT_MENU (File_About, MyFrame::OnAbout)
EVT_MENU (File_Clip, MyFrame::OnClip)
#if wxUSE_GRAPHICS_CONTEXT
EVT_MENU (File_GC_Default, MyFrame::OnGraphicContextDefault)
EVT_MENU (File_DC, MyFrame::OnGraphicContextNone)
#if wxUSE_CAIRO
EVT_MENU (File_GC_Cairo, MyFrame::OnGraphicContextCairo)
#endif // wxUSE_CAIRO
#ifdef __WXMSW__
#if wxUSE_GRAPHICS_GDIPLUS
EVT_MENU (File_GC_GDIPlus, MyFrame::OnGraphicContextGDIPlus)
#endif
#if wxUSE_GRAPHICS_DIRECT2D
EVT_MENU (File_GC_Direct2D, MyFrame::OnGraphicContextDirect2D)
#endif
#endif // __WXMSW__
EVT_MENU (File_AntiAliasing, MyFrame::OnAntiAliasing)
EVT_UPDATE_UI (File_AntiAliasing, MyFrame::OnAntiAliasingUpdateUI)
#endif // wxUSE_GRAPHICS_CONTEXT
EVT_MENU (File_Buffer, MyFrame::OnBuffer)
EVT_MENU (File_Copy, MyFrame::OnCopy)
EVT_MENU (File_Save, MyFrame::OnSave)
EVT_MENU (File_BBox, MyFrame::OnBoundingBox)
EVT_UPDATE_UI (File_BBox, MyFrame::OnBoundingBoxUpdateUI)
EVT_MENU_RANGE(MenuShow_First, MenuShow_Last, MyFrame::OnShow)
EVT_MENU_RANGE(MenuOption_First, MenuOption_Last, MyFrame::OnOption)
wxEND_EVENT_TABLE()
// frame constructor
MyFrame::MyFrame(const wxString& title)
: wxFrame(NULL, wxID_ANY, title)
{
// set the frame icon
SetIcon(wxICON(sample));
wxMenu *menuScreen = new wxMenu;
menuScreen->Append(File_ShowDefault, "&Default screen\tF1");
menuScreen->Append(File_ShowText, "&Text screen\tF2");
menuScreen->Append(File_ShowLines, "&Lines screen\tF3");
menuScreen->Append(File_ShowBrushes, "&Brushes screen\tF4");
menuScreen->Append(File_ShowPolygons, "&Polygons screen\tF5");
menuScreen->Append(File_ShowMask, "&Mask screen\tF6");
menuScreen->Append(File_ShowMaskStretch, "1/&2 scaled mask\tShift-F6");
menuScreen->Append(File_ShowOps, "&Raster operations screen\tF7");
menuScreen->Append(File_ShowRegions, "Re&gions screen\tF8");
menuScreen->Append(File_ShowCircles, "&Circles screen\tF9");
#if wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
menuScreen->Append(File_ShowAlpha, "&Alpha screen\tF10");
#endif // wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
menuScreen->Append(File_ShowSplines, "Spl&ines screen\tF11");
menuScreen->Append(File_ShowGradients, "&Gradients screen\tF12");
#if wxUSE_GRAPHICS_CONTEXT
menuScreen->Append(File_ShowGraphics, "&Graphics screen");
#endif
menuScreen->Append(File_ShowSystemColours, "System &colours");
wxMenu *menuFile = new wxMenu;
#if wxUSE_GRAPHICS_CONTEXT
// Number the different renderer choices consecutively, starting from 0.
int accel = 0;
m_menuItemUseDC = menuFile->AppendRadioItem
(
File_DC,
wxString::Format("Use wx&DC\t%d", accel++)
);
menuFile->AppendRadioItem
(
File_GC_Default,
wxString::Format("Use default wx&GraphicContext\t%d", accel++)
);
#if wxUSE_CAIRO
menuFile->AppendRadioItem
(
File_GC_Cairo,
wxString::Format("Use &Cairo\t%d", accel++)
);
#endif // wxUSE_CAIRO
#ifdef __WXMSW__
#if wxUSE_GRAPHICS_GDIPLUS
menuFile->AppendRadioItem
(
File_GC_GDIPlus,
wxString::Format("Use &GDI+\t%d", accel++)
);
#endif
#if wxUSE_GRAPHICS_DIRECT2D
menuFile->AppendRadioItem
(
File_GC_Direct2D,
wxString::Format("Use &Direct2D\t%d", accel++)
);
#endif
#endif // __WXMSW__
#endif // wxUSE_GRAPHICS_CONTEXT
menuFile->AppendSeparator();
menuFile->AppendCheckItem(File_BBox, "Show bounding box\tCtrl-E",
"Show extents used in drawing operations");
menuFile->AppendCheckItem(File_Clip, "&Clip\tCtrl-C", "Clip/unclip drawing");
menuFile->AppendCheckItem(File_Buffer, "&Use wx&BufferedPaintDC\tCtrl-Z", "Buffer painting");
#if wxUSE_GRAPHICS_CONTEXT
menuFile->AppendCheckItem(File_AntiAliasing,
"&Anti-Aliasing in wxGraphicContext\tCtrl-Shift-A",
"Enable Anti-Aliasing in wxGraphicContext")
->Check();
#endif
menuFile->AppendSeparator();
#if wxUSE_METAFILE && defined(wxMETAFILE_IS_ENH)
menuFile->Append(File_Copy, "Copy to clipboard");
#endif
menuFile->Append(File_Save, "&Save...\tCtrl-S", "Save drawing to file");
menuFile->AppendSeparator();
menuFile->Append(File_About, "&About\tCtrl-A", "Show about dialog");
menuFile->AppendSeparator();
menuFile->Append(File_Quit, "E&xit\tAlt-X", "Quit this program");
wxMenu *menuMapMode = new wxMenu;
menuMapMode->Append( MapMode_Text, "&TEXT map mode" );
menuMapMode->Append( MapMode_Lometric, "&LOMETRIC map mode" );
menuMapMode->Append( MapMode_Twips, "T&WIPS map mode" );
menuMapMode->Append( MapMode_Points, "&POINTS map mode" );
menuMapMode->Append( MapMode_Metric, "&METRIC map mode" );
wxMenu *menuUserScale = new wxMenu;
menuUserScale->Append( UserScale_StretchHoriz, "Stretch &horizontally\tCtrl-H" );
menuUserScale->Append( UserScale_ShrinkHoriz, "Shrin&k horizontally\tCtrl-G" );
menuUserScale->Append( UserScale_StretchVertic, "Stretch &vertically\tCtrl-V" );
menuUserScale->Append( UserScale_ShrinkVertic, "&Shrink vertically\tCtrl-W" );
menuUserScale->AppendSeparator();
menuUserScale->Append( UserScale_Restore, "&Restore to normal\tCtrl-0" );
wxMenu *menuAxis = new wxMenu;
menuAxis->AppendCheckItem( AxisMirror_Horiz, "Mirror horizontally\tCtrl-M" );
menuAxis->AppendCheckItem( AxisMirror_Vertic, "Mirror vertically\tCtrl-N" );
wxMenu *menuLogical = new wxMenu;
menuLogical->Append( LogicalOrigin_MoveDown, "Move &down\tCtrl-D" );
menuLogical->Append( LogicalOrigin_MoveUp, "Move &up\tCtrl-U" );
menuLogical->Append( LogicalOrigin_MoveLeft, "Move &right\tCtrl-L" );
menuLogical->Append( LogicalOrigin_MoveRight, "Move &left\tCtrl-R" );
menuLogical->AppendSeparator();
menuLogical->Append( LogicalOrigin_Set, "Set to (&100, 100)\tShift-Ctrl-1" );
menuLogical->Append( LogicalOrigin_Restore, "&Restore to normal\tShift-Ctrl-0" );
#if wxUSE_DC_TRANSFORM_MATRIX
wxMenu *menuTransformMatrix = new wxMenu;
menuTransformMatrix->Append(TransformMatrix_Set, "Set &transformation matrix");
menuTransformMatrix->AppendSeparator();
menuTransformMatrix->Append(TransformMatrix_Reset, "Restore to &normal");
#endif // wxUSE_DC_TRANSFORM_MATRIX
wxMenu *menuColour = new wxMenu;
#if wxUSE_COLOURDLG
menuColour->Append( Colour_TextForeground, "Text &foreground..." );
menuColour->Append( Colour_TextBackground, "Text &background..." );
menuColour->Append( Colour_Background, "Background &colour..." );
#endif // wxUSE_COLOURDLG
menuColour->AppendCheckItem( Colour_BackgroundMode, "&Opaque/transparent\tCtrl-B" );
menuColour->AppendCheckItem( Colour_TextureBackgound, "Draw textured back&ground\tCtrl-T" );
// now append the freshly created menu to the menu bar...
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append(menuFile, "&Drawing");
menuBar->Append(menuScreen, "Scree&n");
menuBar->Append(menuMapMode, "&Mode");
menuBar->Append(menuUserScale, "&Scale");
menuBar->Append(menuAxis, "&Axis");
menuBar->Append(menuLogical, "&Origin");
#if wxUSE_DC_TRANSFORM_MATRIX
menuBar->Append(menuTransformMatrix, "&Transformation");
#endif // wxUSE_DC_TRANSFORM_MATRIX
menuBar->Append(menuColour, "&Colours");
// ... and attach this menu bar to the frame
SetMenuBar(menuBar);
#if wxUSE_STATUSBAR
CreateStatusBar(2);
SetStatusText("Welcome to wxWidgets!");
#endif // wxUSE_STATUSBAR
m_mapMode = wxMM_TEXT;
m_xUserScale = 1.0;
m_yUserScale = 1.0;
m_xLogicalOrigin = 0;
m_yLogicalOrigin = 0;
m_xAxisReversed =
m_yAxisReversed = false;
#if wxUSE_DC_TRANSFORM_MATRIX
m_transform_dx = 0.0;
m_transform_dy = 0.0;
m_transform_scx = 1.0;
m_transform_scy = 1.0;
m_transform_rot = 0.0;
#endif // wxUSE_DC_TRANSFORM_MATRIX
m_backgroundMode = wxBRUSHSTYLE_SOLID;
m_colourForeground = *wxBLACK;
m_colourBackground = *wxLIGHT_GREY;
m_textureBackground = false;
m_canvas = new MyCanvas( this );
m_canvas->SetScrollbars( 10, 10, 100, 240 );
SetSize(FromDIP(wxSize(800, 700)));
Center(wxBOTH);
}
// event handlers
void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
// true is to force the frame to close
Close(true);
}
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
wxString msg;
msg.Printf( "This is the about dialog of the drawing sample.\n"
"This sample tests various primitive drawing functions\n"
"(without any attempts to prevent flicker).\n"
"Copyright (c) Robert Roebling 1999"
);
wxMessageBox(msg, "About Drawing", wxOK | wxICON_INFORMATION, this);
}
void MyFrame::OnClip(wxCommandEvent& event)
{
m_canvas->Clip(event.IsChecked());
}
void MyFrame::OnBuffer(wxCommandEvent& event)
{
m_canvas->UseBuffer(event.IsChecked());
}
void MyFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
{
#if wxUSE_METAFILE && defined(wxMETAFILE_IS_ENH)
wxMetafileDC dc;
if (!dc.IsOk())
return;
m_canvas->Draw(dc);
wxMetafile *mf = dc.Close();
if (!mf)
return;
mf->SetClipboard();
delete mf;
#endif
}
void MyFrame::OnSave(wxCommandEvent& WXUNUSED(event))
{
wxString wildCard = "Bitmap image (*.bmp)|*.bmp;*.BMP";
#if wxUSE_LIBPNG
wildCard.Append("|PNG image (*.png)|*.png;*.PNG");
#endif
#if wxUSE_SVG
wildCard.Append("|SVG image (*.svg)|*.svg;*.SVG");
#endif
#if wxUSE_POSTSCRIPT
wildCard.Append("|PostScript file (*.ps)|*.ps;*.PS");
#endif
wxFileDialog dlg(this, "Save as bitmap", wxEmptyString, wxEmptyString,
wildCard,
wxFD_SAVE | wxFD_OVERWRITE_PROMPT);
if (dlg.ShowModal() == wxID_OK)
{
wxSize canvasSize = m_canvas->GetDIPDrawingSize();
wxFileName fn(dlg.GetPath());
wxString ext = fn.GetExt().Lower();
#if wxUSE_SVG
if (ext == "svg")
{
#if wxUSE_GRAPHICS_CONTEXT
// Graphics screen can only be drawn using GraphicsContext
if (m_canvas->GetPage() == File_ShowGraphics) {
wxLogMessage("Graphics screen can not be saved as SVG.");
return;
}
wxGraphicsRenderer* tempRenderer = m_canvas->GetRenderer();
m_canvas->UseGraphicRenderer(NULL);
#endif
wxSVGFileDC svgdc(dlg.GetPath(),
canvasSize.GetWidth(),
canvasSize.GetHeight(),
72,
"Drawing sample");
svgdc.SetBitmapHandler(new wxSVGBitmapEmbedHandler());
m_canvas->Draw(svgdc);
#if wxUSE_GRAPHICS_CONTEXT
m_canvas->UseGraphicRenderer(tempRenderer);
#endif
}
else
#endif
#if wxUSE_POSTSCRIPT
if ( ext == "ps" )
{
#if wxUSE_GRAPHICS_CONTEXT
// Graphics screen can only be drawn using wxGraphicsContext
if (m_canvas->GetPage() == File_ShowGraphics)
{
wxLogMessage("Graphics screen can not be saved as PostScript file.");
return;
}
wxGraphicsRenderer* curRenderer = m_canvas->GetRenderer();
m_canvas->UseGraphicRenderer(NULL);
#endif // wxUSE_GRAPHICS_CONTEXT
wxPrintData printData;
printData.SetPrintMode(wxPRINT_MODE_FILE);
printData.SetFilename(dlg.GetPath());
printData.SetOrientation(wxPORTRAIT);
printData.SetPaperId(wxPAPER_A4);
wxPostScriptDC psdc(printData);
// Save current scale factor
const double curUserScaleX = m_xUserScale;
const double curUserScaleY = m_yUserScale;
// Change the scale temporarily to fit the drawing into the page.
int w, h;
psdc.GetSize(&w, &h);
double sc = wxMin((double)w / canvasSize.GetWidth(), (double)h / canvasSize.GetHeight());
m_xUserScale *= sc;
m_yUserScale *= sc;
psdc.StartDoc("Drawing sample");
// Define default font.
psdc.SetFont( wxFontInfo(10).Family(wxFONTFAMILY_MODERN) );
psdc.StartPage();
m_canvas->Draw(psdc);
psdc.EndPage();
psdc.EndDoc();
// Restore original scale facor
m_xUserScale = curUserScaleX;
m_yUserScale = curUserScaleY;
#if wxUSE_GRAPHICS_CONTEXT
m_canvas->UseGraphicRenderer(curRenderer);
#endif // wxUSE_GRAPHICS_CONTEXT
}
else
#endif // wxUSE_POSTSCRIPT
{
wxBitmap bmp;
bmp.CreateWithDIPSize(canvasSize, GetDPIScaleFactor());
wxMemoryDC mdc(bmp);
mdc.SetBackground(*wxWHITE_BRUSH);
mdc.Clear();
m_canvas->Draw(mdc);
bmp.ConvertToImage().SaveFile(dlg.GetPath());
}
}
}
void MyFrame::OnShow(wxCommandEvent& event)
{
const int show = event.GetId();
#if wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
// Make sure we do use a graphics context when selecting one of the screens
// requiring it.
#if wxDRAWING_DC_SUPPORTS_ALPHA
// If DC supports drawing with alpha
// then GC is necessary only for graphics screen.
if ( show == File_ShowGraphics )
#else // wxUSE_GRAPHICS_CONTEXT
// DC doesn't support drawing with alpha
// so GC is necessary both for alpha and graphics screen.
if ( show == File_ShowAlpha || show == File_ShowGraphics )
#endif // wxDRAWING_DC_SUPPORTS_ALPHA, wxUSE_GRAPHICS_CONTEXT
{
if ( !m_canvas->HasRenderer() )
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetDefaultRenderer());
// Disable selecting wxDC, if necessary.
m_menuItemUseDC->Enable(!m_canvas->HasRenderer());
}
else
{
m_menuItemUseDC->Enable(true);
}
#endif // wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
m_canvas->ToShow(show);
}
void MyFrame::OnOption(wxCommandEvent& event)
{
switch (event.GetId())
{
case MapMode_Text:
m_mapMode = wxMM_TEXT;
break;
case MapMode_Lometric:
m_mapMode = wxMM_LOMETRIC;
break;
case MapMode_Twips:
m_mapMode = wxMM_TWIPS;
break;
case MapMode_Points:
m_mapMode = wxMM_POINTS;
break;
case MapMode_Metric:
m_mapMode = wxMM_METRIC;
break;
case LogicalOrigin_MoveDown:
m_yLogicalOrigin += 10;
break;
case LogicalOrigin_MoveUp:
m_yLogicalOrigin -= 10;
break;
case LogicalOrigin_MoveLeft:
m_xLogicalOrigin += 10;
break;
case LogicalOrigin_MoveRight:
m_xLogicalOrigin -= 10;
break;
case LogicalOrigin_Set:
m_xLogicalOrigin =
m_yLogicalOrigin = -100;
break;
case LogicalOrigin_Restore:
m_xLogicalOrigin =
m_yLogicalOrigin = 0;
break;
case UserScale_StretchHoriz:
m_xUserScale *= 1.10;
break;
case UserScale_ShrinkHoriz:
m_xUserScale /= 1.10;
break;
case UserScale_StretchVertic:
m_yUserScale *= 1.10;
break;
case UserScale_ShrinkVertic:
m_yUserScale /= 1.10;
break;
case UserScale_Restore:
m_xUserScale =
m_yUserScale = 1.0;
break;
case AxisMirror_Vertic:
m_yAxisReversed = !m_yAxisReversed;
break;
case AxisMirror_Horiz:
m_xAxisReversed = !m_xAxisReversed;
break;
#if wxUSE_DC_TRANSFORM_MATRIX
case TransformMatrix_Set:
{
TransformDataDialog dlg(this, m_transform_dx, m_transform_dy,
m_transform_scx, m_transform_scy, m_transform_rot);
if ( dlg.ShowModal() == wxID_OK )
{
dlg.GetTransformationData(&m_transform_dx, &m_transform_dy,
&m_transform_scx, &m_transform_scy, &m_transform_rot);
}
}
break;
case TransformMatrix_Reset:
m_transform_dx = 0.0;
m_transform_dy = 0.0;
m_transform_scx = 1.0;
m_transform_scy = 1.0;
m_transform_rot = 0.0;
break;
#endif // wxUSE_DC_TRANSFORM_MATRIX
#if wxUSE_COLOURDLG
case Colour_TextForeground:
m_colourForeground = SelectColour();
break;
case Colour_TextBackground:
m_colourBackground = SelectColour();
break;
case Colour_Background:
{
wxColour col = SelectColour();
if ( col.IsOk() )
{
m_backgroundBrush.SetColour(col);
}
}
break;
#endif // wxUSE_COLOURDLG
case Colour_BackgroundMode:
m_backgroundMode = m_backgroundMode == wxBRUSHSTYLE_SOLID
? wxBRUSHSTYLE_TRANSPARENT
: wxBRUSHSTYLE_SOLID;
break;
case Colour_TextureBackgound:
m_textureBackground = ! m_textureBackground;
break;
default:
// skip Refresh()
return;
}
m_canvas->Refresh();
}
void MyFrame::OnBoundingBox(wxCommandEvent& evt)
{
m_canvas->ShowBoundingBox(evt.IsChecked());
}
void MyFrame::OnBoundingBoxUpdateUI(wxUpdateUIEvent& evt)
{
#if wxUSE_GRAPHICS_CONTEXT
evt.Enable(m_canvas->GetPage() != File_ShowGraphics);
#else
wxUnusedVar(evt);
#endif // wxUSE_GRAPHICS_CONTEXT / !wxUSE_GRAPHICS_CONTEXT
}
void MyFrame::PrepareDC(wxDC& dc)
{
#if wxUSE_DC_TRANSFORM_MATRIX
if ( dc.CanUseTransformMatrix() )
{
wxAffineMatrix2D mtx;
mtx.Translate(m_transform_dx, m_transform_dy);
mtx.Rotate(wxDegToRad(m_transform_rot));
mtx.Scale(m_transform_scx, m_transform_scy);
dc.SetTransformMatrix(mtx);
}
#endif // wxUSE_DC_TRANSFORM_MATRIX
dc.SetLogicalOrigin( dc.FromDIP(m_xLogicalOrigin), dc.FromDIP(m_yLogicalOrigin) );
dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed );
dc.SetUserScale( m_xUserScale, m_yUserScale );
dc.SetMapMode( m_mapMode );
}
#if wxUSE_COLOURDLG
wxColour MyFrame::SelectColour()
{
wxColour col;
wxColourData data;
wxColourDialog dialog(this, &data);
if ( dialog.ShowModal() == wxID_OK )
{
col = dialog.GetColourData().GetColour();
}
return col;
}
#endif // wxUSE_COLOURDLG
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