wxWidgets/samples/svg/svgtest.cpp

// biol75@york.ac.uk (Chris Elliott) March 2000

#ifdef __BIDE__
#define _NO_VCL
#include "condefs.h"
USERC("svg.rc");
//---------------------------------------------------------------------------
#define WinMain WinMain
#endif
/////////////////////////////////////////////////////////////////////////////
// Name:        svgtest.cpp
// Purpose:     SVG sample
// Author:      Chris Elliott
// Modified by:
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

// ===========================================================================
// declarations
// ===========================================================================

// ---------------------------------------------------------------------------
// headers
// ---------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/wx.h"
#include "wx/mdi.h"
#endif

#include <wx/toolbar.h>
#include <wx/svg/dcsvg.h>

#ifndef __WXMSW__
#include "mondrian.xpm"									     
#endif									    
#include "bitmaps/new.xpm"
#include "bitmaps/save.xpm"
#include "bitmaps/help.xpm"
#include "SVGlogo24.xpm"
									     
class MyChild;

// Define a new application
class MyApp : public wxApp
{
    public:
        bool OnInit();
};

// Define a new frame
class MyFrame : public wxMDIParentFrame
{
    public:
        int nWinCreated;

        wxList m_children;

        MyFrame(wxWindow *parent, const wxWindowID id, const wxString& title,
            const wxPoint& pos, const wxSize& size, const long style);

        void InitToolBar(wxToolBar* toolBar);

        void OnSize(wxSizeEvent& event);
        void OnAbout(wxCommandEvent& event);
        void OnNewWindow(wxCommandEvent& event);
        void OnQuit(wxCommandEvent& event);
        void OnClose(wxCloseEvent& event);
        void FileSavePicture (wxCommandEvent & WXUNUSED(event) ) ;

        DECLARE_EVENT_TABLE()
};


class MyCanvas : public wxScrolledWindow
{
    public:
        int m_index ;
   
        MyChild * m_child ;
        MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size);
        virtual void OnDraw(wxDC& dc);

        DECLARE_EVENT_TABLE()
};

class MyChild: public wxMDIChildFrame
{
    public:
        MyCanvas *m_canvas;
        MyFrame  *m_frame ;

        //////////////////// Methods

        MyChild(wxMDIParentFrame *parent, const wxString& title, const wxPoint& pos, const wxSize& size, const long style);
        ~MyChild();

        void OnActivate(wxActivateEvent& event);
        void OnQuit(wxCommandEvent& event);
        void OnClose(wxCloseEvent& event);
        bool OnSave(wxString filename) ;

        DECLARE_EVENT_TABLE()
};

// menu items ids
enum
{
    MDI_QUIT = 100,
    MDI_NEW_WINDOW,
    MDI_SAVE,
    MDI_REFRESH,
    MDI_CHILD_QUIT,
    MDI_ABOUT
};


IMPLEMENT_APP(MyApp)

// ---------------------------------------------------------------------------
// global variables
// ---------------------------------------------------------------------------

MyFrame *frame = (MyFrame *) NULL;

// ---------------------------------------------------------------------------
// event tables
// ---------------------------------------------------------------------------

BEGIN_EVENT_TABLE(MyFrame, wxMDIParentFrame)
EVT_MENU(MDI_ABOUT, MyFrame::OnAbout)
EVT_MENU(MDI_NEW_WINDOW, MyFrame::OnNewWindow)
EVT_MENU(MDI_QUIT, MyFrame::OnQuit)
EVT_MENU (MDI_SAVE, MyFrame::FileSavePicture)
EVT_CLOSE(MyFrame::OnClose)

EVT_SIZE(MyFrame::OnSize)
END_EVENT_TABLE()

// ===========================================================================
// implementation
// ===========================================================================

// ---------------------------------------------------------------------------
// MyApp
// ---------------------------------------------------------------------------

// Initialise this in OnInit, not statically
bool MyApp::OnInit()
{
    // Create the main frame window

    frame = new MyFrame((wxFrame *)NULL, -1, wxT("SVG Demo"),
        wxPoint(-1, -1), wxSize(500, 400),
        wxDEFAULT_FRAME_STYLE | wxHSCROLL | wxVSCROLL);
        

    // Make a menubar
    wxMenu *file_menu = new wxMenu;

    file_menu->Append(MDI_NEW_WINDOW, wxT("&New test\tCtrl+N"));
    file_menu->Append(MDI_QUIT, wxT("&Exit\tAlt+X"));

    wxMenu *help_menu = new wxMenu;
    help_menu->Append(MDI_ABOUT, wxT("&About"));

    wxMenuBar *menu_bar = new wxMenuBar;

    menu_bar->Append(file_menu, wxT("&File"));
    menu_bar->Append(help_menu, wxT("&Help"));

    // Associate the menu bar with the frame
    frame->SetMenuBar(menu_bar);

    frame->CreateStatusBar();

    frame->Show(TRUE);

    SetTopWindow(frame);

    return TRUE;
}


// ---------------------------------------------------------------------------
// MyFrame
// ---------------------------------------------------------------------------

// Define my frame constructor
MyFrame::MyFrame(wxWindow *parent, const wxWindowID id, const wxString& title,
    const wxPoint& pos, const wxSize& size, const long style)
        : wxMDIParentFrame(parent, id, title, pos, size, style)
{
    nWinCreated = 0 ;

    // Give it an icon
    SetIcon(wxICON(mondrian));

    CreateToolBar(wxNO_BORDER | wxTB_FLAT | wxTB_HORIZONTAL);
    InitToolBar(GetToolBar());

}


void MyFrame::OnClose(wxCloseEvent& event)
{
    if ( !event.CanVeto() )
    {
        event.Skip();
        return ;
    }
    if ( m_children.Number () < 1 )
    {
        event.Skip();
        return ;
    }
    // now try the children
    wxNode * pNode = m_children.GetFirst ();
    wxNode * pNext ;
    MyChild * pChild ;
    while ( pNode )
    {
        pNext = pNode -> GetNext ();
        pChild = (MyChild*) pNode -> Data ();
        if (pChild -> Close ())
        {
            delete pNode ;
        }
        else
        {
            event.Veto();
            return;
        }
        pNode = pNext ;
    }
    event.Skip();
}


void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
    Close();
}


void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
{
    (void)wxMessageBox(wxT("wxWindows 2.0 SVG 1.0 Test\n"
        "Author: Chris Elliott (c) 2002\n"
        "Usage: svg.exe \nClick File | New to show tests\n\n"), wxT("About SVG Test"));
}


void MyFrame::OnNewWindow(wxCommandEvent& WXUNUSED(event) )
{
    // Make another frame, containing a canvas
    MyChild *subframe ;

    m_children.Append (new MyChild(frame, wxT("SVG Frame"),
        wxPoint(-1, -1), wxSize(-1, -1),
        wxDEFAULT_FRAME_STYLE )   ) ;

    subframe = (MyChild *) m_children.GetLast() -> Data ();
    wxString title;
    title.Printf(wxT("SVG Test Window %d"), nWinCreated );
    // counts number of children previously, even if now closed
    nWinCreated ++ ;

    // Give it a title and icon
    subframe->SetTitle(title);
    subframe->SetIcon(wxICON(mondrian));

    // Make a menubar
    wxMenu *file_menu = new wxMenu;

    file_menu->Append(MDI_NEW_WINDOW, wxT("&Another test\tCtrl+N"));
    file_menu->Append(MDI_SAVE, wxT("&Save\tCtrl+S"), wxT("Save in SVG format"));
    file_menu->Append(MDI_CHILD_QUIT, wxT("&Close child\tCtrl+F4"));
    file_menu->Append(MDI_QUIT, wxT("&Exit\tAlt+X"));

    wxMenu *help_menu = new wxMenu;
    help_menu->Append(MDI_ABOUT, wxT("&About"));

    wxMenuBar *menu_bar = new wxMenuBar;

    menu_bar->Append(file_menu, wxT("&File"));
    menu_bar->Append(help_menu, wxT("&Help"));

    // Associate the menu bar with the frame
    subframe->SetMenuBar(menu_bar);

    subframe->Show(TRUE);
}


void MyFrame::OnSize(wxSizeEvent& WXUNUSED(event))
{
    int w, h;
    GetClientSize(&w, &h);

    GetClientWindow()->SetSize(0, 0, w, h);
}


void MyFrame::InitToolBar(wxToolBar* toolBar)
{
    const int maxBitmaps = 3 ;
    wxBitmap* bitmaps[maxBitmaps];

    bitmaps[0] = new wxBitmap( new_xpm );
    bitmaps[1] = new wxBitmap( save_xpm );
    bitmaps[2] = new wxBitmap( help_xpm );

    int width = 16;
    int currentX = 5;

    toolBar->AddTool( MDI_NEW_WINDOW, *(bitmaps[0]), wxNullBitmap, FALSE, currentX, -1, (wxObject *) NULL, wxT("New SVG test window"));
    currentX += width + 5;
    toolBar->AddTool( MDI_SAVE, *bitmaps[1], wxNullBitmap, FALSE, currentX, -1, (wxObject *) NULL, wxT("Save test in SVG format"));
    currentX += width + 5;
    toolBar->AddSeparator();      
    toolBar->AddTool(MDI_ABOUT, *bitmaps[2], wxNullBitmap, TRUE, currentX, -1, (wxObject *) NULL, wxT("Help"));

    toolBar->Realize();

    int i;
    for (i = 0; i < maxBitmaps; i++)
        delete bitmaps[i];
}


void MyFrame::FileSavePicture (wxCommandEvent & WXUNUSED(event) )
{
    MyChild * pChild = (MyChild *)GetActiveChild ();
    if (pChild == NULL) 
    {
        return ;
    }

    wxFileDialog dialog(this, wxT("Save Picture as"), wxEmptyString, pChild->GetTitle(),
        wxT("SVG vector picture files (*.svg)|*.svg"),
        wxSAVE|wxOVERWRITE_PROMPT);

    if (dialog.ShowModal() == wxID_OK)
    {
        if (!pChild -> OnSave ( dialog.GetPath() ))
        {
            return ;
        }
    }
    return ;
}


// Note that MDI_NEW_WINDOW and MDI_ABOUT commands get passed
// to the parent window for processing, so no need to
// duplicate event handlers here.
BEGIN_EVENT_TABLE(MyChild, wxMDIChildFrame)
    EVT_MENU(MDI_CHILD_QUIT, MyChild::OnQuit)
    EVT_CLOSE(MyChild::OnClose)
END_EVENT_TABLE()

BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)

END_EVENT_TABLE()

// ---------------------------------------------------------------------------
// MyCanvas
// ---------------------------------------------------------------------------

// Define a constructor for my canvas
MyCanvas::MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size)
: wxScrolledWindow(parent, -1, pos, size,
wxSUNKEN_BORDER|wxVSCROLL|wxHSCROLL)
{
    m_child = (MyChild *) parent ;
    SetBackgroundColour(wxColour("WHITE"));
    m_index = m_child->m_frame->nWinCreated % 7 ;
}


// Define the repainting behaviour
void MyCanvas::OnDraw(wxDC& dc)
{
    // vars to use ...
    wxString s ;
    wxPen wP ;
    wxBrush wB ;
    wxPoint points[6];
    wxColour wC;
    wxFont wF ;

    dc.SetFont(*wxSWISS_FONT);
    dc.SetPen(*wxGREEN_PEN);

    
    switch (m_index)
    {
        default:
        case 0:
            // draw lines to make a cross
            dc.DrawLine(0, 0, 200, 200);
            dc.DrawLine(200, 0, 0, 200);
            // draw point colored line and spline
            wP = *wxCYAN_PEN ;
            wP.SetWidth(3);
            dc.SetPen(wP);

            dc.DrawPoint (25,15) ;
            dc.DrawLine(50, 30, 200, 30);
            dc.DrawSpline(50, 200, 50, 100, 200, 10);
            s = wxT("Green Cross, Cyan Line and spline");
            break ;

        case 1:
            // draw standard shapes
            dc.SetBrush(*wxCYAN_BRUSH);
            dc.SetPen(*wxRED_PEN);
            dc.DrawRectangle(10, 10, 100, 70);
            wB = wxBrush ("DARK ORCHID", wxTRANSPARENT);
            dc.SetBrush (wB);
            dc.DrawRoundedRectangle(50, 50, 100, 70, 20);
            dc.SetBrush (wxBrush("GOLDENROD", wxSOLID) );
            dc.DrawEllipse(100, 100, 100, 50);

            points[0].x = 100; points[0].y = 200;
            points[1].x = 70; points[1].y = 260;
            points[2].x = 160; points[2].y = 230;
            points[3].x = 40; points[3].y = 230;
            points[4].x = 130; points[4].y = 260;
            points[5].x = 100; points[5].y = 200;

            dc.DrawPolygon(5, points);
            dc.DrawLines (6, points, 160);
            s = wxT("Blue rectangle, red edge, clear rounded rectangle, gold ellipse, gold and clear stars");
            break ;

        case 2:
            // draw text in Arial or similar font
            dc.DrawLine(50,25,50,35);
            dc.DrawLine(45,30,55,30);
            dc.DrawText(wxT("This is a Swiss-style string"), 50, 30);
            wC = dc.GetTextForeground() ;
            dc.SetTextForeground ("FIREBRICK");
                                 
            // no effect in msw ??
            dc.SetTextBackground ("WHEAT");
            dc.DrawText(wxT("This is a Red string"), 50, 200);
            dc.DrawRotatedText(wxT("This is a 45 deg string"), 50, 200, 45);
            dc.DrawRotatedText(wxT("This is a 90 deg string"), 50, 200, 90);
            wF = wxFont ( 18, wxROMAN, wxITALIC, wxBOLD, FALSE, wxT("Times New Roman"));
            dc.SetFont(wF);
            dc.SetTextForeground (wC) ;
            dc.DrawText(wxT("This is a Times-style string"), 50, 60);
            s = wxT("Swiss, Times text; red text, rotated and colored orange");
            break ;

        case 3 :
            // four arcs start and end points, center
            dc.SetBrush(*wxGREEN_BRUSH);
            dc.DrawArc ( 200,300, 370,230, 300.0,300.0 );
            dc.SetBrush(*wxBLUE_BRUSH);
            dc.DrawArc ( 270-50, 270-86, 270-86, 270-50, 270.0,270.0 );
            dc.SetDeviceOrigin(-10,-10);
            dc.DrawArc ( 270-50, 270-86, 270-86, 270-50, 270.0,270.0 );
            dc.SetDeviceOrigin(0,0);

            wP.SetColour ("CADET BLUE");
            dc.SetPen(wP);
            dc.DrawArc ( 75,125, 110, 40, 75.0, 75.0 );

            wP.SetColour ("SALMON");
            dc.SetPen(wP);
            dc.SetBrush(*wxRED_BRUSH);
            //top left corner, width and height, start and end angle
                                 // 315 same center and x-radius as last pie-arc, half Y radius
            dc.DrawEllipticArc(25,50,100,50,180.0,45.0) ;

            wP = *wxCYAN_PEN ;
            wP.SetWidth(3);
            dc.SetPen(wP);
                                 //wxTRANSPARENT));
            dc.SetBrush (wxBrush ("SALMON",wxSOLID)) ;
            dc.DrawEllipticArc(300,  0,200,100, 0.0,145.0) ;
                                 //same end point
            dc.DrawEllipticArc(300, 50,200,100,90.0,145.0) ;
            dc.DrawEllipticArc(300,100,200,100,90.0,345.0) ;

            s = wxT("This is an arc test page");
            break ;

        case 4:
            dc.DrawCheckMark ( 30,30,25,25);
            dc.SetBrush (wxBrush ("SALMON",wxTRANSPARENT));
            dc.DrawCheckMark ( 80,50,75,75);
            dc.DrawRectangle ( 80,50,75,75);
            s = wxT("Two check marks");
            break ;

        case 5:
            wF = wxFont ( 18, wxROMAN, wxITALIC, wxBOLD, FALSE, wxT("Times New Roman"));
            dc.SetFont(wF);
            dc.DrawLine(0, 0, 200, 200);
            dc.DrawLine(200, 0, 0, 200);
            dc.DrawText(wxT("This is an 18pt string"), 50, 60);

            // rescale and draw in blue
            wP = *wxCYAN_PEN ;
            dc.SetPen(wP);
            dc.SetUserScale (2.0,0.5);
            dc.SetDeviceOrigin(200,0);
            dc.DrawLine(0, 0, 200, 200);
            dc.DrawLine(200, 0, 0, 200);
            dc.DrawText(wxT("This is an 18pt string 2 x 0.5 UserScaled"), 50, 60);
            dc.SetUserScale (2.0,2.0);
            dc.SetDeviceOrigin(200,200);
            dc.DrawText(wxT("This is an 18pt string 2 x 2 UserScaled"), 50, 60);

            wP = *wxRED_PEN ;
            dc.SetPen(wP);
            dc.SetUserScale (1.0,1.0);
            dc.SetDeviceOrigin(0,10);
            dc.SetMapMode (wxMM_METRIC) ; //svg ignores this
            dc.DrawLine(0, 0, 200, 200);
            dc.DrawLine(200, 0, 0, 200);
            dc.DrawText(wxT("This is an 18pt string in MapMode"), 50, 60); 
            s = wxT("Scaling test page");
            break ;

        case 6:
            dc.DrawIcon( wxICON(mondrian), 10, 10 );
            dc.DrawBitmap ( wxBITMAP (svgbitmap), 50,15);
            s = wxT("Icon and Bitmap ");
            break ;

    }
    m_child->SetStatusText(s);
}




// ---------------------------------------------------------------------------
// MyChild
// ---------------------------------------------------------------------------

MyChild::MyChild(wxMDIParentFrame *parent, const wxString& title,
const wxPoint& pos, const wxSize& size,
const long style)
: wxMDIChildFrame(parent, -1, title, pos, size, style)
{

    m_frame = (MyFrame *) parent ;
    CreateStatusBar();
    SetStatusText(title);    

    int w, h ;
    GetClientSize ( &w, &h );
    m_canvas = new MyCanvas(this, wxPoint(0, 0),  wxSize (w,h)  );
    // Give it scrollbars
    m_canvas->SetScrollbars(20, 20, 50, 50);

}


MyChild::~MyChild()
{
    m_frame->m_children.DeleteObject(this);
}


void MyChild::OnQuit(wxCommandEvent& WXUNUSED(event))
{
    Close(TRUE);
}


bool MyChild::OnSave(wxString filename)
{
    wxSVGFileDC svgDC (filename, 600, 650) ;
    m_canvas->OnDraw (svgDC);
    return svgDC.Ok();
}



void MyChild::OnActivate(wxActivateEvent& event)
{
    if ( event.GetActive() && m_canvas )
        m_canvas->SetFocus();
}


void MyChild::OnClose(wxCloseEvent& event)
{
    event.Skip();
}