a23fd0e1d1
2. wxDC split into wxDC and wxDCBase 3. Several minor bug fixes, many major new bugs git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2455 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
291 lines
6.9 KiB
C++
291 lines
6.9 KiB
C++
/*
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* Program: image
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*
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* Author: Robert Roebling
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*
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* Copyright: (C) 1998, Robert Roebling
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*
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*/
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// For compilers that support precompilation, includes "wx/wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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#include "wx/image.h"
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#include "wx/file.h"
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// derived classes
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class MyFrame;
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class MyApp;
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// MyCanvas
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class MyCanvas: public wxScrolledWindow
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{
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public:
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MyCanvas() {};
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MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
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~MyCanvas();
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void OnPaint( wxPaintEvent &event );
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void CreateAntiAliasedBitmap();
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wxBitmap *my_horse_png;
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wxBitmap *my_horse_jpeg;
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wxBitmap *my_horse_gif;
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wxBitmap *my_square;
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wxBitmap *my_anti;
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DECLARE_DYNAMIC_CLASS(MyCanvas)
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DECLARE_EVENT_TABLE()
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};
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// MyFrame
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class MyFrame: public wxFrame
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{
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public:
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MyFrame();
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void OnAbout( wxCommandEvent &event );
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void OnQuit( wxCommandEvent &event );
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MyCanvas *m_canvas;
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DECLARE_DYNAMIC_CLASS(MyFrame)
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DECLARE_EVENT_TABLE()
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};
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// MyApp
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class MyApp: public wxApp
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{
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public:
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virtual bool OnInit();
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};
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// main program
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IMPLEMENT_APP(MyApp)
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// MyCanvas
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IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
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BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
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EVT_PAINT(MyCanvas::OnPaint)
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END_EVENT_TABLE()
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MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
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const wxPoint &pos, const wxSize &size )
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: wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
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{
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my_horse_png = (wxBitmap*) NULL;
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my_horse_jpeg = (wxBitmap*) NULL;
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my_horse_gif = (wxBitmap*) NULL;
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my_square = (wxBitmap*) NULL;
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my_anti = (wxBitmap*) NULL;
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SetBackgroundColour(* wxWHITE);
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wxBitmap bitmap( 100, 100 );
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wxMemoryDC dc;
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dc.SelectObject( bitmap );
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dc.SetBrush( wxBrush( "orange", wxSOLID ) );
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dc.SetPen( *wxWHITE_PEN );
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dc.DrawRectangle( 0, 0, 100, 100 );
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dc.SelectObject( wxNullBitmap );
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// try to find the directory with our images
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wxString dir;
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if ( wxFile::Exists("./horse.png") )
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dir = "./";
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else if ( wxFile::Exists("../horse.png") )
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dir = "../";
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else
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wxLogWarning("Can't find image files in either '.' or '..'!");
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wxImage image( bitmap );
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if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ) )
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wxLogError("Can't save file");
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if ( !image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG ) )
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wxLogError("Can't load PNG image");
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else
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my_horse_png = new wxBitmap( image.ConvertToBitmap() );
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if ( !image.LoadFile( dir + wxString("horse.jpg"), wxBITMAP_TYPE_JPEG ) )
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wxLogError("Can't load JPG image");
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else
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my_horse_jpeg = new wxBitmap( image.ConvertToBitmap() );
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if ( !image.LoadFile( dir + wxString("horse.gif"), wxBITMAP_TYPE_GIF ) )
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wxLogError("Can't load GIF image");
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else
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my_horse_gif = new wxBitmap( image.ConvertToBitmap() );
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image.LoadFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
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my_square = new wxBitmap( image.ConvertToBitmap() );
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CreateAntiAliasedBitmap();
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}
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MyCanvas::~MyCanvas()
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{
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delete my_horse_png;
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delete my_horse_jpeg;
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delete my_horse_gif;
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delete my_square;
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delete my_anti;
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}
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void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
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{
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wxPaintDC dc( this );
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PrepareDC( dc );
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dc.DrawText( "Loaded image", 30, 10 );
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if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
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dc.DrawText( "Drawn directly", 150, 10 );
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dc.SetBrush( wxBrush( "orange", wxSOLID ) );
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dc.SetPen( *wxWHITE_PEN );
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dc.DrawRectangle( 150, 30, 100, 100 );
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if (my_anti && my_anti->Ok()) dc.DrawBitmap( *my_anti, 250, 140 );
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dc.DrawText( "PNG handler", 30, 135 );
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if (my_horse_png && my_horse_png->Ok()) dc.DrawBitmap( *my_horse_png, 30, 150 );
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dc.DrawText( "JPEG handler", 30, 365 );
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if (my_horse_jpeg && my_horse_jpeg->Ok()) dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
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dc.DrawText( "GIF handler", 30, 595 );
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if (my_horse_gif && my_horse_gif->Ok()) dc.DrawBitmap( *my_horse_gif, 30, 610 );
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}
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void MyCanvas::CreateAntiAliasedBitmap()
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{
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wxBitmap bitmap( 300, 300 );
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wxMemoryDC dc;
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dc.SelectObject( bitmap );
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dc.Clear();
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dc.SetFont( wxFont( 24, wxDECORATIVE, wxDEFAULT, wxDEFAULT ) );
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dc.SetTextForeground( "RED" );
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dc.DrawText( "This is anti-aliased Text.", 20, 20 );
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dc.DrawText( "And a Rectangle.", 20, 60 );
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dc.SetBrush( *wxRED_BRUSH );
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dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
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wxImage original( bitmap );
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wxImage anti( 150, 150 );
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/* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
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for (int y = 1; y < 149; y++)
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for (int x = 1; x < 149; x++)
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{
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int red = original.GetRed( x*2, y*2 ) +
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original.GetRed( x*2-1, y*2 ) +
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original.GetRed( x*2, y*2+1 ) +
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original.GetRed( x*2+1, y*2+1 );
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red = red/4;
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int green = original.GetGreen( x*2, y*2 ) +
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original.GetGreen( x*2-1, y*2 ) +
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original.GetGreen( x*2, y*2+1 ) +
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original.GetGreen( x*2+1, y*2+1 );
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green = green/4;
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int blue = original.GetBlue( x*2, y*2 ) +
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original.GetBlue( x*2-1, y*2 ) +
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original.GetBlue( x*2, y*2+1 ) +
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original.GetBlue( x*2+1, y*2+1 );
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blue = blue/4;
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anti.SetRGB( x, y, red, green, blue );
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}
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my_anti = new wxBitmap( anti.ConvertToBitmap() );
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}
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// MyFrame
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const int ID_QUIT = 108;
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const int ID_ABOUT = 109;
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IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
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BEGIN_EVENT_TABLE(MyFrame,wxFrame)
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EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
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EVT_MENU (ID_QUIT, MyFrame::OnQuit)
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END_EVENT_TABLE()
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MyFrame::MyFrame()
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: wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
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wxPoint(20,20), wxSize(470,360) )
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{
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wxMenu *file_menu = new wxMenu();
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file_menu->Append( ID_ABOUT, "&About..");
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file_menu->Append( ID_QUIT, "E&xit");
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wxMenuBar *menu_bar = new wxMenuBar();
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menu_bar->Append(file_menu, "&File");
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SetMenuBar( menu_bar );
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CreateStatusBar(2);
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int widths[] = { -1, 100 };
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SetStatusWidths( 2, widths );
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m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
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m_canvas->SetScrollbars( 10, 10, 50, 100 );
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}
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void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
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{
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Close( TRUE );
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}
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void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
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{
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(void)wxMessageBox( "wxImage demo\n"
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"Robert Roebling (c) 1998",
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"About wxImage Demo", wxICON_INFORMATION | wxOK );
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}
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//-----------------------------------------------------------------------------
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// MyApp
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//-----------------------------------------------------------------------------
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bool MyApp::OnInit()
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{
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#if wxUSE_LIBPNG
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wxImage::AddHandler( new wxPNGHandler );
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#endif
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#if wxUSE_LIBJPEG
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wxImage::AddHandler( new wxJPEGHandler );
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#endif
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wxImage::AddHandler( new wxGIFHandler );
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wxFrame *frame = new MyFrame();
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frame->Show( TRUE );
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return TRUE;
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}
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