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wxWidgets/samples/drawing/drawing.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: drawing.cpp
// Purpose: shows and tests wxDC features
// Author: Robert Roebling
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "drawing.cpp"
#pragma interface "drawing.cpp"
#endif
// 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" wxWindows headers
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/colordlg.h"
#include "wx/image.h"
// ----------------------------------------------------------------------------
// ressources
// ----------------------------------------------------------------------------
// the application icon
#if defined(__WXGTK__) || defined(__WXMOTIF__)
#include "mondrian.xpm"
#endif
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// what do we show on screen (there are too many shapes to put them all on
// screen simultaneously)
enum ScreenToShow
{
Show_Default,
Show_Text,
Show_Lines,
Show_Polygons,
Show_Mask,
Show_Ops
};
// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------
static wxBitmap gs_bmpNoMask,
gs_bmpWithColMask,
gs_bmpMask,
gs_bmpWithMask,
gs_bmp4,
gs_bmp36;
// ----------------------------------------------------------------------------
// 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();
protected:
bool LoadImages();
};
class MyCanvas;
// 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 OnShow(wxCommandEvent &event);
void OnOption(wxCommandEvent &event);
wxColour SelectColour();
void PrepareDC(wxDC& dc);
int m_backgroundMode;
int m_textureBackground;
int 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;
private:
// any class wishing to process wxWindows events must use this macro
DECLARE_EVENT_TABLE()
};
// define a scrollable canvas for drawing onto
class MyCanvas: public wxScrolledWindow
{
public:
MyCanvas( MyFrame *parent );
void OnPaint(wxPaintEvent &event);
void OnMouseMove(wxMouseEvent &event);
void Show(ScreenToShow show) { m_show = show; Refresh(); }
protected:
void DrawTestPoly( int x, int y, wxDC &dc ,int transparent );
void DrawTestLines( int x, int y, int width, wxDC &dc );
void DrawText(wxDC& dc);
void DrawImages(wxDC& dc);
void DrawWithLogicalOps(wxDC& dc);
void DrawDefault(wxDC& dc);
private:
MyFrame *m_owner;
ScreenToShow m_show;
DECLARE_EVENT_TABLE()
};
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// IDs for the controls and the menu commands
enum
{
// menu items
File_Quit = 1,
File_About,
MenuShow_First,
File_ShowDefault = MenuShow_First,
File_ShowText,
File_ShowLines,
File_ShowPolygons,
File_ShowMask,
File_ShowOps,
MenuShow_Last = File_ShowOps,
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,
Colour_TextForeground,
Colour_TextBackground,
Colour_Background,
Colour_BackgroundMode,
Colour_TextureBackgound,
MenuOption_Last = Colour_TextureBackgound
};
// ----------------------------------------------------------------------------
// event tables and other macros for wxWindows
// ----------------------------------------------------------------------------
// Create a new application object: this macro will allow wxWindows 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)
IMPLEMENT_APP(MyApp)
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// the application class
// ----------------------------------------------------------------------------
bool MyApp::LoadImages()
{
wxPathList pathList;
pathList.Add(".");
pathList.Add("..");
wxString path = pathList.FindValidPath("pat4.bmp");
if ( !path )
return FALSE;
gs_bmp4.LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask* mask4 = new wxMask(gs_bmp4, *wxBLACK);
gs_bmp4.SetMask(mask4);
path = pathList.FindValidPath("pat36.bmp");
if ( !path )
return FALSE;
gs_bmp36.LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask* mask36 = new wxMask(gs_bmp36, *wxBLACK);
gs_bmp36.SetMask(mask36);
path = pathList.FindValidPath("image.bmp");
if ( !path )
return FALSE;
gs_bmpNoMask.LoadFile(path, wxBITMAP_TYPE_BMP);
gs_bmpWithMask.LoadFile(path, wxBITMAP_TYPE_BMP);
gs_bmpWithColMask.LoadFile(path, wxBITMAP_TYPE_BMP);
path = pathList.FindValidPath("mask.bmp");
if ( !path )
return FALSE;
gs_bmpMask.LoadFile(path, wxBITMAP_TYPE_BMP);
// This is so wrong, it hurts.
// gs_bmpMask.SetDepth(1);
// wxMask *mask = new wxMask(gs_bmpMask);
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()
{
// Create the main application window
MyFrame *frame = new MyFrame("Drawing sample",
wxPoint(50, 50), wxSize(550, 340));
// Show it and tell the application that it's our main window
frame->Show(TRUE);
SetTopWindow(frame);
if ( !LoadImages() )
{
wxLogError("Can't load one of the bitmap files needed for this sample "
"from the current or parent directory, please copy them "
"there.");
// stop here
return FALSE;
}
// ok, continue
return TRUE;
}
// ----------------------------------------------------------------------------
// MyCanvas
// ----------------------------------------------------------------------------
// the event tables connect the wxWindows events with the functions (event
// handlers) which process them.
BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
EVT_PAINT (MyCanvas::OnPaint)
EVT_MOTION (MyCanvas::OnMouseMove)
END_EVENT_TABLE()
MyCanvas::MyCanvas( MyFrame *parent ) : wxScrolledWindow( parent )
{
m_owner = parent;
m_show = Show_Default;
}
//draw a polygon and an overlapping rectangle
//is transparent is 1, the fill pattern are made transparent
//is transparent is 2, the fill pattern are made transparent but inversed
//is transparent is 0 the text for and background color will be used to represent/map
//the colors of the monochrome bitmap pixels to the fillpattern
//
//i miss_used the the menu items for setting so called back and fore ground color
//just to show how the those colors do influence the fillpatterns
//just play with those,
//and with the code
//variations are endless using other logical functions
void MyCanvas::DrawTestPoly( int x, int y,wxDC &dc,int transparent )
{
wxBrush* brush4 = new wxBrush(gs_bmp4);
wxBrush* brush36 = new wxBrush(gs_bmp36);
wxPoint todraw[5];
todraw[0].x=(long)x+100;
todraw[0].y=(long)y+100;
todraw[1].x=(long)x+300;
todraw[1].y=(long)y+100;
todraw[2].x=(long)x+300;
todraw[2].y=(long)y+300;
todraw[3].x=(long)x+150;
todraw[3].y=(long)y+350;
todraw[4].x=(long)x+100;
todraw[4].y=(long)y+300;
wxPoint todraw2[5];
todraw2[0].x=100;
todraw2[0].y=100;
todraw2[1].x=300;
todraw2[1].y=100;
todraw2[2].x=300;
todraw2[2].y=300;
todraw2[3].x=150;
todraw2[3].y=350;
todraw2[4].x=100;
todraw2[4].y=300;
switch (transparent)
{
case 0:
{
dc.SetPen( wxPen( "black", 4, wxSOLID) );
dc.SetBrush( *brush4 );
dc.SetTextForeground(*wxGREEN);
dc.SetTextBackground(m_owner->m_colourForeground);
dc.SetLogicalFunction(wxCOPY);
dc.DrawPolygon(5,todraw,0,0,wxWINDING_RULE);
//don't understand hwo but the outline is also depending on logicalfunction
dc.SetPen( wxPen( "red", 4, wxSOLID) );
dc.SetBrush( *brush36 );
dc.SetTextForeground(*wxCYAN);
dc.SetTextBackground(m_owner->m_colourBackground);
dc.SetLogicalFunction(wxCOPY);
dc.DrawRectangle( x+10, y+10, 200, 200 );
dc.SetBrush(wxNullBrush);
dc.SetPen(wxNullPen);
break;
}
case 1: //now with transparent fillpatterns
{
wxBitmap* bmpBlit = new wxBitmap(600,400);
wxMemoryDC* memDC= new wxMemoryDC();
// wxBrush _clearbrush(*wxGREEN,wxSOLID);
wxBrush _clearbrush(*wxBLACK,wxSOLID);
memDC->SelectObject(*bmpBlit);
memDC->BeginDrawing();
memDC->SetBackground(_clearbrush);
memDC->Clear();
memDC->SetBackground(wxNullBrush);
memDC->SetPen( wxPen( "black", 4, wxSOLID) );
memDC->SetBrush( wxNullBrush);
memDC->SetBrush( *brush4 );
memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
memDC->SetTextBackground(*wxWHITE); // 1s --> 0xFFFFFF (white)
memDC->SetLogicalFunction(wxAND_INVERT);
// BLACK OUT the opaque pixels and leave the rest as is
memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
// Set background and foreground colors for fill pattern
//the previous blacked out pixels are now merged with the layer color
//while the non blacked out pixels stay as they are.
memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
//now define what will be the color of the fillpattern parts that are not transparent
// memDC->SetTextBackground(*wxBLUE);
memDC->SetTextBackground(m_owner->m_colourForeground);
memDC->SetLogicalFunction(wxOR);
//don't understand how but the outline is also depending on logicalfunction
memDC->SetPen( wxPen( "red", 4, wxSOLID) );
memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
memDC->SetLogicalFunction(wxCOPY);
memDC->SetPen( wxPen( "black", 4, wxSOLID) );
memDC->SetBrush( wxNullBrush);
memDC->SetBrush( *brush36 );
memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
memDC->SetTextBackground(*wxWHITE); // 1s --> 0xFFFFFF (white)
memDC->SetLogicalFunction(wxAND_INVERT);
memDC->DrawRectangle( 10, 10, 200, 200 );
// Set background and foreground colors for fill pattern
//the previous blacked out pixels are now merged with the layer color
//while the non blacked out pixels stay as they are.
memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
//now define what will be the color of the fillpattern parts that are not transparent
// memDC->SetTextBackground(*wxRED);
memDC->SetTextBackground(m_owner->m_colourBackground);
memDC->SetLogicalFunction(wxOR);
//don't understand how but the outline is also depending on logicalfunction
memDC->SetPen( wxPen( "yellow", 4, wxSOLID) );
memDC->DrawRectangle( 10, 10, 200, 200 );
memDC->SetBrush(wxNullBrush);
memDC->SetPen(wxNullPen);
memDC->EndDrawing();
dc.Blit(x,y,600,400,memDC,0,0,wxCOPY);
delete bmpBlit;
delete memDC;
break;
}
case 2: //now with transparent inversed fillpatterns
{
wxBitmap* bmpBlit = new wxBitmap(600,400);
wxMemoryDC* memDC= new wxMemoryDC();
wxBrush _clearbrush(*wxWHITE,wxSOLID);
memDC->SelectObject(*bmpBlit);
memDC->BeginDrawing();
memDC->SetBackground(_clearbrush);
memDC->Clear();
memDC->SetBackground(wxNullBrush);
memDC->SetPen( wxPen( "black", 4, wxSOLID) );
memDC->SetBrush( *brush4 );
memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
memDC->SetTextForeground(*wxWHITE); // 1s --> 0xFFFFFF (white)
memDC->SetLogicalFunction(wxAND_INVERT);
// BLACK OUT the opaque pixels and leave the rest as is
memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
// Set background and foreground colors for fill pattern
//the previous blacked out pixels are now merged with the layer color
//while the non blacked out pixels stay as they are.
memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
//now define what will be the color of the fillpattern parts that are not transparent
memDC->SetTextForeground(m_owner->m_colourForeground);
memDC->SetLogicalFunction(wxOR);
//don't understand how but the outline is also depending on logicalfunction
memDC->SetPen( wxPen( "red", 4, wxSOLID) );
memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
memDC->SetLogicalFunction(wxCOPY);
memDC->SetPen( wxPen( "black", 4, wxSOLID) );
memDC->SetBrush( *brush36 );
memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
memDC->SetTextForeground(*wxWHITE); // 1s --> 0xFFFFFF (white)
memDC->SetLogicalFunction(wxAND_INVERT);
memDC->DrawRectangle( 10,10, 200, 200 );
// Set background and foreground colors for fill pattern
//the previous blacked out pixels are now merged with the layer color
//while the non blacked out pixels stay as they are.
memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
//now define what will be the color of the fillpattern parts that are not transparent
memDC->SetTextForeground(m_owner->m_colourBackground);
memDC->SetLogicalFunction(wxOR);
//don't understand how but the outline is also depending on logicalfunction
memDC->SetPen( wxPen( "yellow", 4, wxSOLID) );
memDC->DrawRectangle( 10, 10, 200, 200 );
memDC->SetBrush(wxNullBrush);
memDC->SetPen(wxNullPen);
dc.Blit(x,y,600,400,memDC,0,0,wxCOPY);
delete bmpBlit;
delete memDC;
}
}
delete brush4;
delete brush36;
}
void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc )
{
dc.SetPen( wxPen( "black", width, wxSOLID) );
dc.SetBrush( *wxRED_BRUSH );
dc.DrawRectangle( x+10, y+10, 100, 190 );
dc.SetPen( wxPen( "black", width, wxSOLID) );
dc.DrawLine( x+20, y+20, 100, y+20 );
dc.SetPen( wxPen( "black", width, wxDOT) );
dc.DrawLine( x+20, y+30, 100, y+30 );
dc.SetPen( wxPen( "black", width, wxSHORT_DASH) );
dc.DrawLine( x+20, y+40, 100, y+40 );
dc.SetPen( wxPen( "black", width, wxLONG_DASH) );
dc.DrawLine( x+20, y+50, 100, y+50 );
dc.SetPen( wxPen( "black", width, wxDOT_DASH) );
dc.DrawLine( x+20, y+60, 100, y+60 );
dc.SetPen( wxPen( "black", width, wxBDIAGONAL_HATCH) );
dc.DrawLine( x+20, y+70, 100, y+70 );
dc.SetPen( wxPen( "black", width, wxCROSSDIAG_HATCH) );
dc.DrawLine( x+20, y+80, 100, y+80 );
dc.SetPen( wxPen( "black", width, wxFDIAGONAL_HATCH) );
dc.DrawLine( x+20, y+90, 100, y+90 );
dc.SetPen( wxPen( "black", width, wxCROSS_HATCH) );
dc.DrawLine( x+20, y+100, 100, y+100 );
dc.SetPen( wxPen( "black", width, wxHORIZONTAL_HATCH) );
dc.DrawLine( x+20, y+110, 100, y+110 );
dc.SetPen( wxPen( "black", width, wxVERTICAL_HATCH) );
dc.DrawLine( x+20, y+120, 100, y+120 );
wxPen ud( "black", width, wxUSER_DASH );
wxDash dash1[1];
dash1[0] = 0;
ud.SetDashes( 1, dash1 );
dc.DrawLine( x+20, y+140, 100, y+140 );
dash1[0] = 1;
ud.SetDashes( 1, dash1 );
dc.DrawLine( x+20, y+150, 100, y+150 );
dash1[0] = 2;
ud.SetDashes( 1, dash1 );
dc.DrawLine( x+20, y+160, 100, y+160 );
dash1[0] = 0xFF;
ud.SetDashes( 1, dash1 );
dc.DrawLine( x+20, y+170, 100, y+170 );
}
void MyCanvas::DrawDefault(wxDC& dc)
{
// mark the origin
dc.DrawCircle(0, 0, 10);
#if !(defined __WXGTK__) && !(defined __WXMOTIF__)
// not implemented in wxGTK or wxMOTIF :-(
dc.FloodFill(0, 0, wxColour(255, 0, 0));
#endif //
dc.DrawIcon( wxICON(mondrian), 40, 40 );
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
wxIcon icon = wxTheApp->GetStdIcon(wxICON_INFORMATION);
wxCoord rectSize = icon.GetWidth() + 10;
wxCoord x = 100;
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxGREEN_BRUSH );
dc.DrawRectangle(x, 10, rectSize, rectSize);
dc.DrawBitmap(icon, x + 5, 15, TRUE);
x += rectSize + 10;
dc.DrawRectangle(x, 10, rectSize, rectSize);
dc.DrawIcon(wxTheApp->GetStdIcon(wxICON_INFORMATION), 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 );
#include "../image/smile.xpm"
wxBitmap bmp(smile_xpm);
if (bmp.Ok())
dc.DrawBitmap(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;
pen.SetWidth(2);
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 );
image.Rescale( 60,210 );
bitmap = image.ConvertToBitmap();
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);
// 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 hight 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);
wxBrush yellowBrush(wxColour(255, 255, 0), wxSOLID);
memdc2.SetBackground(yellowBrush);
memdc2.Clear();
wxPen yellowPen(wxColour(255, 255, 0), 1, wxSOLID);
// 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(yellowPen);
dc.SetBrush(yellowBrush);
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( wxFont(12, wxMODERN, wxNORMAL, wxNORMAL, TRUE) );
dc.DrawText( "This is text", 110, 10 );
dc.DrawRotatedText( "That is text", 20, 10, -45 );
dc.SetFont( *wxNORMAL_FONT );
wxString text;
dc. SetBackgroundMode(wxTRANSPARENT);
for ( int n = -180; n < 180; n += 30 )
{
text.Printf(" %d rotated text", n);
dc.DrawRotatedText(text , 400, 400, n);
}
dc.SetFont( wxFont( 18, wxSWISS, wxNORMAL, wxNORMAL ) );
dc.DrawText( "This is Swiss 18pt text.", 110, 40 );
long length;
long height;
long descent;
dc.GetTextExtent( "This is Swiss 18pt text.", &length, &height, &descent );
text.Printf( "Dimensions are length %ld, height %ld, descent %ld", length, height, descent );
dc.DrawText( text, 110, 80 );
text.Printf( "CharHeight() returns: %d", dc.GetCharHeight() );
dc.DrawText( text, 110, 120 );
dc.DrawRectangle( 100, 40, 4, height );
}
static const struct
{
const wxChar *name;
int rop;
} rasterOperations[] =
{
{ "wxAND", wxAND },
{ "wxAND_INVERT", wxAND_INVERT },
{ "wxAND_REVERSE", wxAND_REVERSE },
{ "wxCLEAR", wxCLEAR },
{ "wxCOPY", wxCOPY },
{ "wxEQUIV", wxEQUIV },
{ "wxINVERT", wxINVERT },
{ "wxNAND", wxNAND },
{ "wxNO_OP", wxNO_OP },
{ "wxOR", wxOR },
{ "wxOR_INVERT", wxOR_INVERT },
{ "wxOR_REVERSE", wxOR_REVERSE },
{ "wxSET", wxSET },
{ "wxSRC_INVERT", wxSRC_INVERT },
{ "wxXOR", wxXOR },
};
void MyCanvas::DrawImages(wxDC& dc)
{
dc.DrawText("original image", 0, 0);
dc.DrawBitmap(gs_bmpNoMask, 0, 20, 0);
dc.DrawText("with colour mask", 0, 100);
dc.DrawBitmap(gs_bmpWithColMask, 0, 120, TRUE);
dc.DrawText("the mask image", 0, 200);
dc.DrawBitmap(gs_bmpMask, 0, 220, 0);
dc.DrawText("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);
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, 1, wxSOLID));
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, wxSOLID));
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);
}
}
void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event))
{
wxPaintDC dc(this);
PrepareDC(dc);
m_owner->PrepareDC(dc);
dc.SetBackgroundMode( m_owner->m_backgroundMode );
if ( m_owner->m_backgroundBrush.Ok() )
dc.SetBackground( m_owner->m_backgroundBrush );
if ( m_owner->m_colourForeground.Ok() )
dc.SetTextForeground( m_owner->m_colourForeground );
if ( m_owner->m_colourBackground.Ok() )
dc.SetTextBackground( m_owner->m_colourBackground );
if ( m_owner->m_textureBackground) {
if ( ! m_owner->m_backgroundBrush.Ok() ) {
wxBrush b(wxColour(0,128,0), wxSOLID);
dc.SetBackground(b);
}
}
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 Show_Default:
DrawDefault(dc);
break;
case Show_Text:
DrawText(dc);
break;
case Show_Lines:
DrawTestLines( 0, 100, 0, dc );
DrawTestLines( 0, 300, 1, dc );
DrawTestLines( 0, 500, 2, dc );
DrawTestLines( 0, 700, 6, dc );
break;
case Show_Polygons:
DrawTestPoly( 0, 100, dc, 0 );
DrawTestPoly( 33, 500, dc, 1 );
DrawTestPoly( 43, 1000, dc, 2 );
break;
case Show_Mask:
DrawImages(dc);
break;
case Show_Ops:
DrawWithLogicalOps(dc);
break;
}
}
void MyCanvas::OnMouseMove(wxMouseEvent &event)
{
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( "Current mouse position: %d,%d", (int)x, (int)y );
m_owner->SetStatusText( str );
}
// ----------------------------------------------------------------------------
// MyFrame
// ----------------------------------------------------------------------------
// the event tables connect the wxWindows 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.
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU (File_Quit, MyFrame::OnQuit)
EVT_MENU (File_About, MyFrame::OnAbout)
EVT_MENU_RANGE(MenuShow_First, MenuShow_Last, MyFrame::OnShow)
EVT_MENU_RANGE(MenuOption_First, MenuOption_Last, MyFrame::OnOption)
END_EVENT_TABLE()
// frame constructor
MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
: wxFrame((wxFrame *)NULL, -1, title, pos, size)
{
// set the frame icon
SetIcon(wxICON(mondrian));
wxMenu *menuFile = new wxMenu;
menuFile->Append(File_ShowDefault, "&Default screen\tF1");
menuFile->Append(File_ShowText, "&Text screen\tF2");
menuFile->Append(File_ShowLines, "&Lines screen\tF3");
menuFile->Append(File_ShowPolygons, "&Polygons screen\tF4");
menuFile->Append(File_ShowMask, "wx&Mask screen\tF5");
menuFile->Append(File_ShowOps, "&ROP screen\tF6");
menuFile->AppendSeparator();
menuFile->Append(File_About, "&About...\tCtrl-A", "Show about dialog");
menuFile->AppendSeparator();
menuFile->Append(File_Quit, "E&xit\tAlt-X", "Quit this program");
wxMenu *menuMapMode = new wxMenu;
menuMapMode->Append( MapMode_Text, "&TEXT map mode" );
menuMapMode->Append( MapMode_Lometric, "&LOMETRIC map mode" );
menuMapMode->Append( MapMode_Twips, "T&WIPS map mode" );
menuMapMode->Append( MapMode_Points, "&POINTS map mode" );
menuMapMode->Append( MapMode_Metric, "&METRIC map mode" );
wxMenu *menuUserScale = new wxMenu;
menuUserScale->Append( UserScale_StretchHoriz, "Stretch horizontally\tCtrl-H" );
menuUserScale->Append( UserScale_ShrinkHoriz, "Shrink horizontally\tCtrl-G" );
menuUserScale->Append( UserScale_StretchVertic, "Stretch vertically\tCtrl-V" );
menuUserScale->Append( UserScale_ShrinkVertic, "Shrink vertically\tCtrl-W" );
menuUserScale->AppendSeparator();
menuUserScale->Append( UserScale_Restore, "Restore to normal\tCtrl-0" );
wxMenu *menuAxis = new wxMenu;
menuAxis->Append( AxisMirror_Horiz, "Mirror horizontally\tCtrl-M", "", TRUE );
menuAxis->Append( AxisMirror_Vertic, "Mirror vertically\tCtrl-N", "", TRUE );
wxMenu *menuLogical = new wxMenu;
menuLogical->Append( LogicalOrigin_MoveDown, "Move &down\tCtrl-D" );
menuLogical->Append( LogicalOrigin_MoveUp, "Move &up\tCtrl-U" );
menuLogical->Append( LogicalOrigin_MoveLeft, "Move &right\tCtrl-L" );
menuLogical->Append( LogicalOrigin_MoveRight, "Move &left\tCtrl-R" );
wxMenu *menuColour = new wxMenu;
menuColour->Append( Colour_TextForeground, "Text foreground..." );
menuColour->Append( Colour_TextBackground, "Text background..." );
menuColour->Append( Colour_Background, "Background colour..." );
menuColour->Append( Colour_BackgroundMode, "Opaque/transparent\tCtrl-B", "", TRUE );
menuColour->Append( Colour_TextureBackgound, "Draw textured background\tCtrl-T", "", TRUE);
// now append the freshly created menu to the menu bar...
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append(menuFile, "&File");
menuBar->Append(menuMapMode, "&MapMode");
menuBar->Append(menuUserScale, "&UserScale");
menuBar->Append(menuAxis, "&Axis");
menuBar->Append(menuLogical, "&LogicalOrigin");
menuBar->Append(menuColour, "&Colours");
// ... and attach this menu bar to the frame
SetMenuBar(menuBar);
// create a status bar just for fun (by default with 1 pane only)
CreateStatusBar(2);
SetStatusText("Welcome to wxWindows!");
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 = *wxRED;
m_colourBackground = *wxBLUE;
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( _T("This is the about dialog of the drawing sample.\n")
_T("Copyright (c) Robert Roebling 1999")
);
wxMessageBox(msg, "About Drawing", wxOK | wxICON_INFORMATION, this);
}
void MyFrame::OnShow(wxCommandEvent& event)
{
m_canvas->Show((ScreenToShow)(event.GetInt() - MenuShow_First));
}
void MyFrame::OnOption(wxCommandEvent& event)
{
switch (event.GetInt())
{
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 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;
case Colour_TextForeground:
m_colourForeground = SelectColour();
break;
case Colour_TextBackground:
m_colourBackground = SelectColour();
break;
case Colour_Background:
{
wxColour col = SelectColour();
if ( col.Ok() )
{
m_backgroundBrush.SetColour(col);
}
}
break;
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::PrepareDC(wxDC& dc)
{
dc.SetMapMode( m_mapMode );
dc.SetUserScale( m_xUserScale, m_yUserScale );
dc.SetLogicalOrigin( m_xLogicalOrigin, m_yLogicalOrigin );
dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed );
}
wxColour MyFrame::SelectColour()
{
wxColour col;
wxColourData data;
wxColourDialog dialog(this, &data);
if ( dialog.ShowModal() == wxID_OK )
{
col = dialog.GetColourData().GetColour();
}
return col;
}
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