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wxWidgets/samples/drawing/drawing.cpp
Stefan Csomor a6ba2245ef Redo Use implicit wxColour to wxBrush conversion
2017-06-28 07:22:54 +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"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
// 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();
}
bool IsRendererName(const wxString& name) const
{ if ( !m_renderer ) return name.empty();
return m_renderer->GetName() == name;
}
wxGraphicsRenderer* GetRenderer() const { return m_renderer; }
#endif // wxUSE_GRAPHICS_CONTEXT
void UseBuffer(bool use) { m_useBuffer = use; Refresh(); }
void ShowBoundingBox(bool show) { m_showBBox = show; Refresh(); }
void GetDrawingSize(int* width, int* height) const;
void Draw(wxDC& dc);
protected:
enum DrawMode
{
Draw_Normal,
Draw_Stretch
};
void DrawTestLines( int x, int y, int width, 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;
#endif
bool m_useBuffer;
bool m_showBBox;
wxCoord m_sizeX;
wxCoord m_sizeY;
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, const wxPoint& pos, const wxSize& size);
// 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 OnGraphicContextNoneUpdateUI(wxUpdateUIEvent& event)
{
event.Check(m_canvas->IsRendererName(wxEmptyString));
}
void OnGraphicContextDefault(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetDefaultRenderer());
}
void OnGraphicContextDefaultUpdateUI(wxUpdateUIEvent& event)
{
event.Check(m_canvas->IsDefaultRenderer());
}
#if wxUSE_CAIRO
void OnGraphicContextCairo(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetCairoRenderer());
}
void OnGraphicContextCairoUpdateUI(wxUpdateUIEvent& event)
{
event.Check(m_canvas->IsRendererName(wxS("cairo")));
}
#endif // wxUSE_CAIRO
#ifdef __WXMSW__
#if wxUSE_GRAPHICS_GDIPLUS
void OnGraphicContextGDIPlus(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetGDIPlusRenderer());
}
void OnGraphicContextGDIPlusUpdateUI(wxUpdateUIEvent& event)
{
event.Check(m_canvas->IsRendererName(wxS("gdiplus")));
}
#endif
#if wxUSE_GRAPHICS_DIRECT2D
void OnGraphicContextDirect2D(wxCommandEvent& WXUNUSED(event))
{
m_canvas->UseGraphicRenderer(wxGraphicsRenderer::GetDirect2DRenderer());
}
void OnGraphicContextDirect2DUpdateUI(wxUpdateUIEvent& event)
{
event.Check(m_canvas->IsRendererName(wxS("direct2d")));
}
#endif
#endif // __WXMSW__
#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;
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,
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_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(wxT("."));
pathList.Add(wxT(".."));
pathList.Add(wxT("../.."));
wxString path = pathList.FindValidPath(wxT("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(wxT("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(wxT("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(wxT("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;
// Create the main application window
MyFrame *frame = new MyFrame(wxT("Drawing sample"),
wxDefaultPosition, wxSize(550, 840));
// Show it
frame->Show(true);
if ( !LoadImages() )
{
wxLogError(wxT("Can't load one of the bitmap files needed ")
wxT("for this sample from the current or parent ")
wxT("directory, please copy them there."));
// still continue, the sample can be used without images too if they're
// missing for whatever reason
}
#if wxUSE_LIBPNG
wxImage::AddHandler( new wxPNGHandler );
#endif
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 | wxNO_FULL_REPAINT_ON_RESIZE)
{
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;
#endif
m_useBuffer = false;
m_showBBox = false;
m_sizeX = 0;
m_sizeY = 0;
}
void MyCanvas::DrawTestBrushes(wxDC& dc)
{
static const wxCoord WIDTH = 200;
static const wxCoord HEIGHT = 80;
wxCoord x = 10,
y = 10;
dc.SetBrush(*wxGREEN_BRUSH);
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText(wxT("Solid green"), x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxRED, wxBRUSHSTYLE_CROSSDIAG_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText(wxT("Diagonally hatched red"), x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxBLUE, wxBRUSHSTYLE_CROSS_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText(wxT("Cross hatched blue"), x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxCYAN, wxBRUSHSTYLE_VERTICAL_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText(wxT("Vertically hatched cyan"), x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxBLACK, wxBRUSHSTYLE_HORIZONTAL_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText(wxT("Horizontally hatched black"), x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*gs_bmpMask));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText(wxT("Stipple mono"), x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*gs_bmpNoMask));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText(wxT("Stipple colour"), x + 10, y + 10);
}
void MyCanvas::DrawTestPoly(wxDC& dc)
{
wxBrush brushHatch(*wxRED, wxBRUSHSTYLE_FDIAGONAL_HATCH);
dc.SetBrush(brushHatch);
wxPoint star[5];
star[0] = wxPoint(100, 60);
star[1] = wxPoint(60, 150);
star[2] = wxPoint(160, 100);
star[3] = wxPoint(40, 100);
star[4] = wxPoint(140, 150);
dc.DrawText(wxT("You should see two (irregular) stars below, the left one ")
wxT("hatched"), 10, 10);
dc.DrawText(wxT("except for the central region and the right ")
wxT("one entirely hatched"), 10, 30);
dc.DrawText(wxT("The third star only has a hatched outline"), 10, 50);
dc.DrawPolygon(WXSIZEOF(star), star, 0, 30);
dc.DrawPolygon(WXSIZEOF(star), star, 160, 30, wxWINDING_RULE);
wxBrush brushHatchGreen(*wxGREEN, wxBRUSHSTYLE_FDIAGONAL_HATCH);
dc.SetBrush(brushHatchGreen);
wxPoint star2[10];
star2[0] = wxPoint(0, 100);
star2[1] = wxPoint(-59, -81);
star2[2] = wxPoint(95, 31);
star2[3] = wxPoint(-95, 31);
star2[4] = wxPoint(59, -81);
star2[5] = wxPoint(0, 80);
star2[6] = wxPoint(-47, -64);
star2[7] = wxPoint(76, 24);
star2[8] = wxPoint(-76, 24);
star2[9] = wxPoint(47, -64);
int count[2] = {5, 5};
dc.DrawPolyPolygon(WXSIZEOF(count), count, star2, 450, 150);
}
void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc )
{
dc.SetPen( wxPen( *wxBLACK, width ) );
dc.SetBrush( *wxRED_BRUSH );
dc.DrawText(wxString::Format(wxT("Testing lines of width %d"), width), x + 10, y - 10);
dc.DrawRectangle( x+10, y+10, 100, 190 );
dc.DrawText(wxT("Solid/dot/short dash/long dash/dot dash"), x + 150, y + 10);
dc.SetPen( wxPen( *wxBLACK, width ) );
dc.DrawLine( x+20, y+20, 100, y+20 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_DOT) );
dc.DrawLine( x+20, y+30, 100, y+30 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_SHORT_DASH) );
dc.DrawLine( x+20, y+40, 100, y+40 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_LONG_DASH) );
dc.DrawLine( x+20, y+50, 100, y+50 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_DOT_DASH) );
dc.DrawLine( x+20, y+60, 100, y+60 );
dc.DrawText(wxT("Misc hatches"), x + 150, y + 70);
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_BDIAGONAL_HATCH) );
dc.DrawLine( x+20, y+70, 100, y+70 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_CROSSDIAG_HATCH) );
dc.DrawLine( x+20, y+80, 100, y+80 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_FDIAGONAL_HATCH) );
dc.DrawLine( x+20, y+90, 100, y+90 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_CROSS_HATCH) );
dc.DrawLine( x+20, y+100, 100, y+100 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_HORIZONTAL_HATCH) );
dc.DrawLine( x+20, y+110, 100, y+110 );
dc.SetPen( wxPen( *wxBLACK, width, wxPENSTYLE_VERTICAL_HATCH) );
dc.DrawLine( x+20, y+120, 100, y+120 );
dc.DrawText(wxT("User dash"), x + 150, 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( x+20, y+140, 100, y+140 );
dash1[0] = 5; // Make first dash shorter
ud.SetDashes( 6, dash1 );
dc.SetPen( ud );
dc.DrawLine( x+20, y+150, 100, y+150 );
dash1[2] = 5; // Make second dash longer
ud.SetDashes( 6, dash1 );
dc.SetPen( ud );
dc.DrawLine( x+20, y+160, 100, y+160 );
dash1[4] = 5; // Make third dash longer
ud.SetDashes( 6, dash1 );
dc.SetPen( ud );
dc.DrawLine( x+20, y+170, 100, y+170 );
}
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(21, 21, false);
img.Clear(1);
wxBitmap bmp(img);
{
wxMemoryDC mdc(bmp);
mdc.SetBrush(dc.GetBrush());
mdc.SetPen(dc.GetPen());
mdc.DrawCircle(10, 10, 10);
wxColour c;
if (mdc.GetPixel(11, 11, &c))
{
mdc.SetBrush(wxColour(128, 128, 0));
mdc.FloodFill(11, 11, c, wxFLOOD_SURFACE);
}
}
bmp.SetMask(new wxMask(bmp, wxColour(1, 1, 1)));
dc.DrawBitmap(bmp, -10, -10, true);
}
dc.DrawCheckMark(5, 80, 15, 15);
dc.DrawCheckMark(25, 80, 30, 30);
dc.DrawCheckMark(60, 80, 60, 60);
// this is the test for "blitting bitmap into DC damages selected brush" bug
wxCoord rectSize = m_std_icon.GetWidth() + 10;
wxCoord x = 100;
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxGREEN_BRUSH );
dc.DrawRectangle(x, 10, rectSize, rectSize);
dc.DrawBitmap(m_std_icon, x + 5, 15, true);
x += rectSize + 10;
dc.DrawRectangle(x, 10, rectSize, rectSize);
dc.DrawIcon(m_std_icon, x + 5, 15);
x += rectSize + 10;
dc.DrawRectangle(x, 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 - 20, rectSize - 10, true);
dc.SetBrush( *wxBLACK_BRUSH );
dc.DrawRectangle( 0, 160, 1000, 300 );
// draw lines
wxBitmap bitmap(20,70);
wxMemoryDC memdc;
memdc.SelectObject( bitmap );
memdc.SetBrush( *wxBLACK_BRUSH );
memdc.SetPen( *wxWHITE_PEN );
memdc.DrawRectangle(0,0,20,70);
memdc.DrawLine( 10,0,10,70 );
// to the right
wxPen pen = *wxRED_PEN;
memdc.SetPen(pen);
memdc.DrawLine( 10, 5,10, 5 );
memdc.DrawLine( 10,10,11,10 );
memdc.DrawLine( 10,15,12,15 );
memdc.DrawLine( 10,20,13,20 );
/*
memdc.SetPen(*wxRED_PEN);
memdc.DrawLine( 12, 5,12, 5 );
memdc.DrawLine( 12,10,13,10 );
memdc.DrawLine( 12,15,14,15 );
memdc.DrawLine( 12,20,15,20 );
*/
// same to the left
memdc.DrawLine( 10,25,10,25 );
memdc.DrawLine( 10,30, 9,30 );
memdc.DrawLine( 10,35, 8,35 );
memdc.DrawLine( 10,40, 7,40 );
// XOR draw lines
dc.SetPen(*wxWHITE_PEN);
memdc.SetLogicalFunction( wxINVERT );
memdc.SetPen( *wxWHITE_PEN );
memdc.DrawLine( 10,50,10,50 );
memdc.DrawLine( 10,55,11,55 );
memdc.DrawLine( 10,60,12,60 );
memdc.DrawLine( 10,65,13,65 );
memdc.DrawLine( 12,50,12,50 );
memdc.DrawLine( 12,55,13,55 );
memdc.DrawLine( 12,60,14,60 );
memdc.DrawLine( 12,65,15,65 );
memdc.SelectObject( wxNullBitmap );
dc.DrawBitmap( bitmap, 10, 170 );
wxImage image = bitmap.ConvertToImage();
image.Rescale( 60,210 );
bitmap = wxBitmap(image);
dc.DrawBitmap( bitmap, 50, 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(150, 170, 49, 29);
dc.DrawRectangle(200, 170, 49, 29);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(250, 210, 250, 170);
dc.DrawLine(260, 200, 150, 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(300, 170, 49, 29);
dc.DrawRectangle(350, 170, 49, 29);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(400, 170, 400, 210);
dc.DrawLine(300, 200, 410, 200);
// a few more tests of this kind
dc.SetPen(*wxRED_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(300, 220, 1, 1);
dc.DrawRectangle(310, 220, 2, 2);
dc.DrawRectangle(320, 220, 3, 3);
dc.DrawRectangle(330, 220, 4, 4);
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(300, 230, 1, 1);
dc.DrawRectangle(310, 230, 2, 2);
dc.DrawRectangle(320, 230, 3, 3);
dc.DrawRectangle(330, 230, 4, 4);
// and now for filled rect with outline
dc.SetPen(*wxRED_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(500, 170, 49, 29);
dc.DrawRectangle(550, 170, 49, 29);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(600, 170, 600, 210);
dc.DrawLine(500, 200, 610, 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(150, 270, 49, 29, 6);
dc.DrawRoundedRectangle(200, 270, 49, 29, 6);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(250, 270, 250, 310);
dc.DrawLine(150, 300, 260, 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(300, 270, 49, 29, 6);
dc.DrawRoundedRectangle(350, 270, 49, 29, 6);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(400, 270, 400, 310);
dc.DrawLine(300, 300, 410, 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 = 70;
int totalHeight = 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, 500, 270);
// Repeat, but draw directly on dc
// Draw a yellow rectangle filling the bitmap
x = 600; int y = 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( wxT("This is text"), 110, 10 );
dc.DrawRotatedText( wxT("That is text"), 20, 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(wxTRANSPARENT);
for ( int n = -180; n < 180; n += 30 )
{
text.Printf(wxT(" %d rotated text"), n);
dc.DrawRotatedText(text , 400, 400, n);
}
dc.SetFont( wxFontInfo(18).Family(wxFONTFAMILY_SWISS) );
dc.DrawText( wxT("This is Swiss 18pt text."), 110, 40 );
wxCoord length;
wxCoord height;
wxCoord descent;
dc.GetTextExtent( wxT("This is Swiss 18pt text."), &length, &height, &descent );
text.Printf( wxT("Dimensions are length %d, height %d, descent %d"), length, height, descent );
dc.DrawText( text, 110, 80 );
text.Printf( wxT("CharHeight() returns: %d"), dc.GetCharHeight() );
dc.DrawText( text, 110, 120 );
dc.DrawRectangle( 100, 40, 4, height );
// test the logical function effect
wxCoord y = 150;
dc.SetLogicalFunction(wxINVERT);
// text drawing should ignore logical function
dc.DrawText( wxT("There should be a text below"), 110, y );
dc.DrawRectangle( 110, y, 100, height );
y += height;
dc.DrawText( wxT("Visible text"), 110, y );
dc.DrawRectangle( 110, y, 100, height );
dc.DrawText( wxT("Visible text"), 110, y );
dc.DrawRectangle( 110, y, 100, height );
dc.SetLogicalFunction(wxCOPY);
y += height;
dc.DrawRectangle( 110, y, 100, height );
dc.DrawText( wxT("Another visible text"), 110, y );
y += height;
dc.DrawText("And\nmore\ntext on\nmultiple\nlines", 110, y);
y += 5*height;
dc.SetTextForeground(*wxBLUE);
dc.DrawRotatedText("Rotated text\ncan have\nmultiple lines\nas well", 110, y, 15);
}
static const struct
{
const wxChar *name;
wxRasterOperationMode rop;
} rasterOperations[] =
{
{ wxT("wxAND"), wxAND },
{ wxT("wxAND_INVERT"), wxAND_INVERT },
{ wxT("wxAND_REVERSE"), wxAND_REVERSE },
{ wxT("wxCLEAR"), wxCLEAR },
{ wxT("wxCOPY"), wxCOPY },
{ wxT("wxEQUIV"), wxEQUIV },
{ wxT("wxINVERT"), wxINVERT },
{ wxT("wxNAND"), wxNAND },
{ wxT("wxNO_OP"), wxNO_OP },
{ wxT("wxOR"), wxOR },
{ wxT("wxOR_INVERT"), wxOR_INVERT },
{ wxT("wxOR_REVERSE"), wxOR_REVERSE },
{ wxT("wxSET"), wxSET },
{ wxT("wxSRC_INVERT"), wxSRC_INVERT },
{ wxT("wxXOR"), wxXOR },
};
void MyCanvas::DrawImages(wxDC& dc, DrawMode mode)
{
dc.DrawText(wxT("original image"), 0, 0);
dc.DrawBitmap(*gs_bmpNoMask, 0, 20, 0);
dc.DrawText(wxT("with colour mask"), 0, 100);
dc.DrawBitmap(*gs_bmpWithColMask, 0, 120, true);
dc.DrawText(wxT("the mask image"), 0, 200);
dc.DrawBitmap(*gs_bmpMask, 0, 220, 0);
dc.DrawText(wxT("masked image"), 0, 300);
dc.DrawBitmap(*gs_bmpWithMask, 0, 320, true);
int cx = gs_bmpWithColMask->GetWidth(),
cy = gs_bmpWithColMask->GetHeight();
wxMemoryDC memDC;
for ( size_t n = 0; n < WXSIZEOF(rasterOperations); n++ )
{
wxCoord x = 120 + 150*(n%4),
y = 20 + 100*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - 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 = 60;
static const wxCoord h = 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 = 20 + 150*(n%4),
y = 20 + 100*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - 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 = 20 + 150*(n%4),
y = 500 + 100*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - 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)
{
wxDouble margin = 20 ;
wxDouble width = 180 ;
wxDouble radius = 30 ;
dc.SetPen( wxPen( wxColour( 128, 0, 0 ), 12 ));
dc.SetBrush(*wxRED_BRUSH);
wxRect r(margin,margin+width*0.66,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 * 0.8 , - width * 0.66 ) ;
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 * 0.8 , width *0.5 ) ;
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 , 100 , radius) ;
dc.SetTextBackground( wxColour(160, 192, 160, 160) );
dc.SetTextForeground( wxColour(255, 128, 128, 128) );
dc.SetFont( wxFont( 40, wxFONTFAMILY_SWISS, wxFONTSTYLE_ITALIC, wxFONTWEIGHT_NORMAL ) );
dc.DrawText( wxT("Hello!"), 120, 80 );
}
#endif // wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
#if wxUSE_GRAPHICS_CONTEXT
const int BASE = 80.0;
const int BASE2 = BASE/2;
const int BASE4 = BASE/4;
// modeled along Robin Dunn's GraphicsContext.py sample
void MyCanvas::DrawGraphics(wxGraphicsContext* gc)
{
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(60, 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-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(60, 200); // offset to the lower part of the window
gc->DrawText("Scale", 0, -BASE2);
gc->Translate(0, 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(5,5);
gc->DrawPath(path);
}
gc->PopState(); // restore saved state
gc->PushState(); // save it again
gc->Translate(400, 200);
gc->DrawText("Rotate", 0, -BASE2);
// Move the origin over to the next location
gc->Translate(0, 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(float(angle)/360, 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(60, 400);
const wxString labelText(wxS("Scaled smiley inside a square"));
gc->DrawText(labelText, 0, 0);
// Center a bitmap horizontally
wxDouble textWidth;
gc->GetTextExtent(labelText, &textWidth, NULL);
const wxDouble rectWidth = 100;
wxDouble x0 = (textWidth - rectWidth) / 2;
gc->DrawRectangle(x0, BASE2, rectWidth, 100);
gc->DrawBitmap(m_smile_bmp, x0, BASE2, rectWidth, 100);
gc->PopState();
// Draw graphics bitmap and its subbitmap
gc->PushState();
gc->Translate(300, 400);
gc->DrawText(wxS("Smiley as a graphics bitmap"), 0, 0);
wxGraphicsBitmap gbmp1 = gc->CreateBitmap(m_smile_bmp);
gc->DrawBitmap(gbmp1, 0, BASE2, 50, 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, 80, BASE2, 50, 50*(bmph/2)/(bmpw/2));
gc->PopState();
}
#endif // wxUSE_GRAPHICS_CONTEXT
void MyCanvas::DrawCircles(wxDC& dc)
{
int x = 100,
y = 100,
r = 20;
dc.SetPen( *wxRED_PEN );
dc.SetBrush( *wxGREEN_BRUSH );
dc.DrawText(wxT("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(wxT("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(wxT("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(wxT("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(wxT("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(wxT("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(wxT("Some splines"), 10, 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 = 300;
const wxPoint center( R + 20, R + 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( M_PI * angle / 180.0) );
pts[ i ].y = center.y + (wxCoord)( r * sin( M_PI * angle / 180.0) );
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(wxT("Splines not supported."), 10, 5);
#endif
}
void MyCanvas::DrawGradients(wxDC& dc)
{
static const int TEXT_HEIGHT = 15;
// LHS: linear
wxRect r(10, 10, 50, 50);
dc.DrawText(wxT("wxRIGHT"), r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxRIGHT);
r.Offset(0, r.height + 10);
dc.DrawText(wxT("wxLEFT"), r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxLEFT);
r.Offset(0, r.height + 10);
dc.DrawText(wxT("wxDOWN"), r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxDOWN);
r.Offset(0, r.height + 10);
dc.DrawText(wxT("wxUP"), r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxUP);
wxRect gfr = wxRect(r);
// RHS: concentric
r = wxRect(200, 10, 50, 50);
dc.DrawText(wxT("Blue inside"), r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillConcentric(r, *wxBLUE, *wxWHITE);
r.Offset(0, r.height + 10);
dc.DrawText(wxT("White inside"), r.x, r.y);
r.Offset(0, TEXT_HEIGHT);
dc.GradientFillConcentric(r, *wxWHITE, *wxBLUE);
r.Offset(0, r.height + 10);
dc.DrawText(wxT("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 + 10);
dc.DrawText(wxT("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 = 350;
r.y = 30;
dc.DrawText("The interior should be filled but", r.x, r.y);
r.y += 15;
dc.DrawText(" the red border should remain visible:", r.x, r.y);
r.y += 15;
r.width =
r.height = 50;
wxRect r2 = r;
r2.x += 60;
wxRect r3 = r;
r3.y += 60;
wxRect r4 = r2;
r4.y += 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)
{
wxGCDC &gdc = (wxGCDC&)dc;
wxGraphicsContext *gc = gdc.GetGraphicsContext();
wxGraphicsPath pth;
wxGraphicsGradientStops stops;
double boxX, boxY, boxWidth, boxHeight;
gfr.Offset(0, gfr.height + 10);
dc.DrawText(wxT("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 + 10);
dc.DrawText(wxT("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 + 10);
dc.DrawText(wxT("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 + 10);
dc.DrawText(wxT("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 + 10);
dc.DrawText(wxT("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 + 10);
dc.DrawText(wxT("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));
}
#endif // wxUSE_GRAPHICS_CONTEXT
}
void MyCanvas::DrawSystemColours(wxDC& dc)
{
wxFont mono(wxFontInfo().Family(wxFONTFAMILY_TELETYPE));
wxSize textSize;
{
wxDCFontChanger setMono(dc, mono);
textSize = dc.GetTextExtent(wxS("#01234567"));
}
int lineHeight = textSize.GetHeight();
wxRect r(textSize.GetWidth() + 10, 10, 100, 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), 10, r.y);
}
dc.SetBrush(wxBrush(c));
dc.DrawRectangle(r);
dc.DrawText(colourName, r.GetRight() + 10, r.y);
r.y += lineHeight;
}
}
void MyCanvas::DrawRegions(wxDC& dc)
{
dc.DrawText(wxT("You should see a red rect partly covered by a cyan one ")
wxT("on the left"), 10, 5);
dc.DrawText(wxT("and 5 smileys from which 4 are partially clipped on the right"),
10, 5 + dc.GetCharHeight());
dc.DrawText(wxT("The second copy should be identical but right part of it ")
wxT("should be offset by 10 pixels."),
10, 5 + 2*dc.GetCharHeight());
DrawRegionsHelper(dc, 10, true);
DrawRegionsHelper(dc, 350, false);
}
void MyCanvas::DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime)
{
wxCoord y = 100;
dc.DestroyClippingRegion();
dc.SetBrush( *wxWHITE_BRUSH );
dc.SetPen( *wxTRANSPARENT_PEN );
dc.DrawRectangle( x, y, 310, 310 );
dc.SetClippingRegion( x + 10, y + 10, 100, 270 );
dc.SetBrush( *wxRED_BRUSH );
dc.DrawRectangle( x, y, 310, 310 );
dc.SetClippingRegion( x + 10, y + 10, 100, 100 );
dc.SetBrush( *wxCYAN_BRUSH );
dc.DrawRectangle( x, y, 310, 310 );
dc.DestroyClippingRegion();
wxRegion region(x + 110, y + 20, 100, 270);
#if !defined(__WXMOTIF__)
if ( !firstTime )
region.Offset(10, 10);
#endif
dc.SetDeviceClippingRegion(region);
dc.SetBrush( *wxGREY_BRUSH );
dc.DrawRectangle( x, y, 310, 310 );
if (m_smile_bmp.IsOk())
{
dc.DrawBitmap( m_smile_bmp, x + 150, y + 150, true );
dc.DrawBitmap( m_smile_bmp, x + 130, y + 10, true );
dc.DrawBitmap( m_smile_bmp, x + 130, y + 280, true );
dc.DrawBitmap( m_smile_bmp, x + 100, y + 70, true );
dc.DrawBitmap( m_smile_bmp, x + 200, y + 70, true );
}
}
void MyCanvas::GetDrawingSize(int* width, int* height) const
{
if ( width )
*width = m_sizeX;
if ( height )
*height = m_sizeY;
}
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;
}
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(100, 100, 100, 100);
dc.Clear();
if ( m_owner->m_textureBackground )
{
dc.SetPen(*wxMEDIUM_GREY_PEN);
for ( int i = 0; i < 200; i++ )
dc.DrawLine(0, i*10, 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 );
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_sizeX = dc.LogicalToDeviceX(dc.MaxX()) - x0 + 1;
m_sizeY = 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 = event.GetPosition();
long x = dc.DeviceToLogicalX( pos.x );
long y = dc.DeviceToLogicalY( pos.y );
wxString str;
str.Printf( wxT("Current mouse position: %d,%d"), (int)x, (int)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().c_str(), major, minor, micro);
m_owner->SetStatusText(str, 1);
}
else
{
m_owner->SetStatusText(wxEmptyString, 1);
}
Refresh();
}
#endif // wxUSE_GRAPHICS_CONTEXT
// ----------------------------------------------------------------------------
// 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_UPDATE_UI (File_GC_Default, MyFrame::OnGraphicContextDefaultUpdateUI)
EVT_MENU (File_DC, MyFrame::OnGraphicContextNone)
EVT_UPDATE_UI (File_DC, MyFrame::OnGraphicContextNoneUpdateUI)
#if wxUSE_CAIRO
EVT_MENU (File_GC_Cairo, MyFrame::OnGraphicContextCairo)
EVT_UPDATE_UI (File_GC_Cairo, MyFrame::OnGraphicContextCairoUpdateUI)
#endif // wxUSE_CAIRO
#ifdef __WXMSW__
#if wxUSE_GRAPHICS_GDIPLUS
EVT_MENU (File_GC_GDIPlus, MyFrame::OnGraphicContextGDIPlus)
EVT_UPDATE_UI (File_GC_GDIPlus, MyFrame::OnGraphicContextGDIPlusUpdateUI)
#endif
#if wxUSE_GRAPHICS_DIRECT2D
EVT_MENU (File_GC_Direct2D, MyFrame::OnGraphicContextDirect2D)
EVT_UPDATE_UI (File_GC_Direct2D, MyFrame::OnGraphicContextDirect2DUpdateUI)
#endif
#endif // __WXMSW__
#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, const wxPoint& pos, const wxSize& size)
: wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size,
wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE)
{
// set the frame icon
SetIcon(wxICON(sample));
wxMenu *menuScreen = new wxMenu;
menuScreen->Append(File_ShowDefault, wxT("&Default screen\tF1"));
menuScreen->Append(File_ShowText, wxT("&Text screen\tF2"));
menuScreen->Append(File_ShowLines, wxT("&Lines screen\tF3"));
menuScreen->Append(File_ShowBrushes, wxT("&Brushes screen\tF4"));
menuScreen->Append(File_ShowPolygons, wxT("&Polygons screen\tF5"));
menuScreen->Append(File_ShowMask, wxT("&Mask screen\tF6"));
menuScreen->Append(File_ShowMaskStretch, wxT("1/&2 scaled mask\tShift-F6"));
menuScreen->Append(File_ShowOps, wxT("&Raster operations screen\tF7"));
menuScreen->Append(File_ShowRegions, wxT("Re&gions screen\tF8"));
menuScreen->Append(File_ShowCircles, wxT("&Circles screen\tF9"));
#if wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
menuScreen->Append(File_ShowAlpha, wxT("&Alpha screen\tF10"));
#endif // wxDRAWING_DC_SUPPORTS_ALPHA || wxUSE_GRAPHICS_CONTEXT
menuScreen->Append(File_ShowSplines, wxT("Spl&ines screen\tF11"));
menuScreen->Append(File_ShowGradients, wxT("&Gradients screen\tF12"));
#if wxUSE_GRAPHICS_CONTEXT
menuScreen->Append(File_ShowGraphics, wxT("&Graphics screen"));
#endif
menuScreen->Append(File_ShowSystemColours, wxT("System &colours"));
wxMenu *menuFile = new wxMenu;
#if wxUSE_GRAPHICS_CONTEXT
menuFile->AppendCheckItem(File_GC_Default, "Use default wx&GraphicContext\tCtrl-Y");
m_menuItemUseDC = menuFile->AppendRadioItem(File_DC, "Use wx&DC\tShift-Ctrl-Y");
#if wxUSE_CAIRO
menuFile->AppendRadioItem(File_GC_Cairo, "Use &Cairo\tCtrl-O");
#endif // wxUSE_CAIRO
#ifdef __WXMSW__
#if wxUSE_GRAPHICS_GDIPLUS
menuFile->AppendRadioItem(File_GC_GDIPlus, "Use &GDI+\tCtrl-+");
#endif
#if wxUSE_GRAPHICS_DIRECT2D
menuFile->AppendRadioItem(File_GC_Direct2D, "Use &Direct2D\tCtrl-2");
#endif
#endif // __WXMSW__
#endif // wxUSE_GRAPHICS_CONTEXT
menuFile->AppendSeparator();
menuFile->AppendCheckItem(File_BBox, wxS("Show bounding box\tCtrl-E"),
wxS("Show extents used in drawing operations"));
menuFile->AppendCheckItem(File_Clip, wxT("&Clip\tCtrl-C"), wxT("Clip/unclip drawing"));
menuFile->AppendCheckItem(File_Buffer, wxT("&Use wx&BufferedPaintDC\tCtrl-Z"), wxT("Buffer painting"));
menuFile->AppendSeparator();
#if wxUSE_METAFILE && defined(wxMETAFILE_IS_ENH)
menuFile->Append(File_Copy, wxT("Copy to clipboard"));
#endif
menuFile->Append(File_Save, wxT("&Save...\tCtrl-S"), wxT("Save drawing to file"));
menuFile->AppendSeparator();
menuFile->Append(File_About, wxT("&About\tCtrl-A"), wxT("Show about dialog"));
menuFile->AppendSeparator();
menuFile->Append(File_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
wxMenu *menuMapMode = new wxMenu;
menuMapMode->Append( MapMode_Text, wxT("&TEXT map mode") );
menuMapMode->Append( MapMode_Lometric, wxT("&LOMETRIC map mode") );
menuMapMode->Append( MapMode_Twips, wxT("T&WIPS map mode") );
menuMapMode->Append( MapMode_Points, wxT("&POINTS map mode") );
menuMapMode->Append( MapMode_Metric, wxT("&METRIC map mode") );
wxMenu *menuUserScale = new wxMenu;
menuUserScale->Append( UserScale_StretchHoriz, wxT("Stretch &horizontally\tCtrl-H") );
menuUserScale->Append( UserScale_ShrinkHoriz, wxT("Shrin&k horizontally\tCtrl-G") );
menuUserScale->Append( UserScale_StretchVertic, wxT("Stretch &vertically\tCtrl-V") );
menuUserScale->Append( UserScale_ShrinkVertic, wxT("&Shrink vertically\tCtrl-W") );
menuUserScale->AppendSeparator();
menuUserScale->Append( UserScale_Restore, wxT("&Restore to normal\tCtrl-0") );
wxMenu *menuAxis = new wxMenu;
menuAxis->AppendCheckItem( AxisMirror_Horiz, wxT("Mirror horizontally\tCtrl-M") );
menuAxis->AppendCheckItem( AxisMirror_Vertic, wxT("Mirror vertically\tCtrl-N") );
wxMenu *menuLogical = new wxMenu;
menuLogical->Append( LogicalOrigin_MoveDown, wxT("Move &down\tCtrl-D") );
menuLogical->Append( LogicalOrigin_MoveUp, wxT("Move &up\tCtrl-U") );
menuLogical->Append( LogicalOrigin_MoveLeft, wxT("Move &right\tCtrl-L") );
menuLogical->Append( LogicalOrigin_MoveRight, wxT("Move &left\tCtrl-R") );
menuLogical->AppendSeparator();
menuLogical->Append( LogicalOrigin_Set, wxT("Set to (&100, 100)\tShift-Ctrl-1") );
menuLogical->Append( LogicalOrigin_Restore, wxT("&Restore to normal\tShift-Ctrl-0") );
wxMenu *menuColour = new wxMenu;
#if wxUSE_COLOURDLG
menuColour->Append( Colour_TextForeground, wxT("Text &foreground...") );
menuColour->Append( Colour_TextBackground, wxT("Text &background...") );
menuColour->Append( Colour_Background, wxT("Background &colour...") );
#endif // wxUSE_COLOURDLG
menuColour->AppendCheckItem( Colour_BackgroundMode, wxT("&Opaque/transparent\tCtrl-B") );
menuColour->AppendCheckItem( Colour_TextureBackgound, wxT("Draw textured back&ground\tCtrl-T") );
// now append the freshly created menu to the menu bar...
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append(menuFile, wxT("&Drawing"));
menuBar->Append(menuScreen, wxT("Scree&n"));
menuBar->Append(menuMapMode, wxT("&Mode"));
menuBar->Append(menuUserScale, wxT("&Scale"));
menuBar->Append(menuAxis, wxT("&Axis"));
menuBar->Append(menuLogical, wxT("&Origin"));
menuBar->Append(menuColour, wxT("&Colours"));
// ... and attach this menu bar to the frame
SetMenuBar(menuBar);
#if wxUSE_STATUSBAR
CreateStatusBar(2);
SetStatusText(wxT("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;
m_backgroundMode = wxSOLID;
m_colourForeground = *wxBLACK;
m_colourBackground = *wxLIGHT_GREY;
m_textureBackground = false;
m_canvas = new MyCanvas( this );
m_canvas->SetScrollbars( 10, 10, 100, 240 );
}
// 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( wxT("This is the about dialog of the drawing sample.\n")
wxT("This sample tests various primitive drawing functions\n")
wxT("(without any attempts to prevent flicker).\n")
wxT("Copyright (c) Robert Roebling 1999")
);
wxMessageBox(msg, wxT("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 = wxS("Bitmap image (*.bmp)|*.bmp;*.BMP");
#if wxUSE_LIBPNG
wildCard.Append(wxS("|PNG image (*.png)|*.png;*.PNG"));
#endif
#if wxUSE_SVG
wildCard.Append(wxS("|SVG image (*.svg)|*.svg;*.SVG"));
#endif
#if wxUSE_POSTSCRIPT
wildCard.Append(wxS("|PostScript file (*.ps)|*.ps;*.PS"));
#endif
wxFileDialog dlg(this, wxT("Save as bitmap"), wxEmptyString, wxEmptyString,
wildCard,
wxFD_SAVE | wxFD_OVERWRITE_PROMPT);
if (dlg.ShowModal() == wxID_OK)
{
int width, height;
m_canvas->GetDrawingSize(&width, &height);
wxFileName fn(dlg.GetPath());
wxString ext = fn.GetExt().Lower();
#if wxUSE_SVG
if (ext == wxT("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(), width, height, 72, wxT("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 == wxS("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 / width, (double)h / height);
m_xUserScale *= sc;
m_yUserScale *= sc;
psdc.StartDoc(wxS("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(width, height);
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_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 == wxSOLID ? wxTRANSPARENT
: wxSOLID;
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)
{
dc.SetLogicalOrigin( m_xLogicalOrigin, 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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