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wxWidgets/samples/drawing/drawing.cpp
Robert Roebling a11672a469 wxX11: 
Lots of wxBitmap et al work.
     Adapted wxIcon, wxCursor to this.
     Split wxApp init things up so that the
       X11 display is available sooner.
     Changed initial display code accordingly.
     Corrected wxDC::DrawBitmap.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14170 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2002-02-13 08:38:54 +00:00

1232 lines
37 KiB
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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__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__)
#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_Brushes,
Show_Polygons,
Show_Mask,
Show_Ops,
Show_Regions,
Show_Circles
};
// ----------------------------------------------------------------------------
// 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();
virtual int OnExit() { DeleteBitmaps(); return 0; }
protected:
void DeleteBitmaps();
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 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);
void DrawWithLogicalOps(wxDC& dc);
void DrawRegions(wxDC& dc);
void DrawCircles(wxDC& dc);
void DrawDefault(wxDC& dc);
void DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime);
private:
MyFrame *m_owner;
ScreenToShow m_show;
wxBitmap m_smile_bmp;
wxIcon m_std_icon;
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_ShowBrushes,
File_ShowPolygons,
File_ShowMask,
File_ShowOps,
File_ShowRegions,
File_ShowCircles,
MenuShow_Last = File_ShowCircles,
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,
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()
{
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;
pathList.Add(".");
pathList.Add("..");
wxString path = pathList.FindValidPath("pat4.bmp");
if ( !path )
return FALSE;
/* 4 colour bitmap */
gs_bmp4->LoadFile(path, wxBITMAP_TYPE_BMP);
/* turn into mono-bitmap */
gs_bmp4_mono->LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask* mask4 = new wxMask(*gs_bmp4_mono, *wxBLACK);
gs_bmp4_mono->SetMask(mask4);
path = pathList.FindValidPath("pat36.bmp");
if ( !path )
return FALSE;
gs_bmp36->LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask* mask36 = new wxMask(*gs_bmp36, *wxBLACK);
gs_bmp36->SetMask(mask36);
path = pathList.FindValidPath("image.bmp");
if ( !path )
return FALSE;
gs_bmpNoMask->LoadFile(path, wxBITMAP_TYPE_BMP);
gs_bmpWithMask->LoadFile(path, wxBITMAP_TYPE_BMP);
gs_bmpWithColMask->LoadFile(path, wxBITMAP_TYPE_BMP);
path = pathList.FindValidPath("mask.bmp");
if ( !path )
return FALSE;
gs_bmpMask->LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask *mask = new wxMask(*gs_bmpMask, *wxBLACK);
gs_bmpWithMask->SetMask(mask);
mask = new wxMask(*gs_bmpWithColMask, *wxWHITE);
gs_bmpWithColMask->SetMask(mask);
return TRUE;
}
// `Main program' equivalent: the program execution "starts" here
bool MyApp::OnInit()
{
// 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(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."));
// stop here
DeleteBitmaps();
return FALSE;
}
// ok, continue
return TRUE;
}
void MyApp::DeleteBitmaps()
{
delete gs_bmpNoMask;
delete gs_bmpWithColMask;
delete gs_bmpMask;
delete gs_bmpWithMask;
delete gs_bmp4;
delete gs_bmp4_mono;
delete gs_bmp36;
gs_bmpNoMask = NULL;
gs_bmpWithColMask = NULL;
gs_bmpMask = NULL;
gs_bmpWithMask = NULL;
gs_bmp4 = NULL;
gs_bmp4_mono = NULL;
gs_bmp36 = NULL;
}
// ----------------------------------------------------------------------------
// 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()
#include "smile.xpm"
MyCanvas::MyCanvas(MyFrame *parent)
: wxScrolledWindow(parent, -1, wxDefaultPosition, wxDefaultSize,
wxHSCROLL | wxVSCROLL | wxNO_FULL_REPAINT_ON_RESIZE)
{
m_owner = parent;
m_show = Show_Default;
m_smile_bmp = wxBitmap(smile_xpm);
m_std_icon = wxTheApp->GetStdIcon(wxICON_INFORMATION);
}
void MyCanvas::DrawTestBrushes(wxDC& dc)
{
static const wxCoord WIDTH = 200;
static const wxCoord HEIGHT = 80;
wxCoord x = 10,
y = 10;
dc.SetBrush(wxBrush(*wxGREEN, wxSOLID));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Solid green", x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*wxRED, wxCROSSDIAG_HATCH));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Hatched red", x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*gs_bmpMask));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Stipple mono", x + 10, y + 10);
y += HEIGHT;
dc.SetBrush(wxBrush(*gs_bmpNoMask));
dc.DrawRectangle(x, y, WIDTH, HEIGHT);
dc.DrawText("Stipple colour", x + 10, y + 10);
}
void MyCanvas::DrawTestPoly(wxDC& dc)
{
wxBrush brushHatch(*wxRED, wxFDIAGONAL_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("You should see two (irregular) stars below, the left one "
"hatched", 10, 10);
dc.DrawText("except for the central region and the right "
"one entirely hatched", 10, 30);
dc.DrawPolygon(WXSIZEOF(star), star);
dc.DrawPolygon(WXSIZEOF(star), star, 160, 0, wxWINDING_RULE);
}
void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc )
{
dc.SetPen( wxPen( wxT("black"), width, wxSOLID) );
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("Solid/dot/short dash/long dash/dot dash", x + 150, y + 10);
dc.SetPen( wxPen( wxT("black"), width, wxSOLID) );
dc.DrawLine( x+20, y+20, 100, y+20 );
dc.SetPen( wxPen( wxT("black"), width, wxDOT) );
dc.DrawLine( x+20, y+30, 100, y+30 );
dc.SetPen( wxPen( wxT("black"), width, wxSHORT_DASH) );
dc.DrawLine( x+20, y+40, 100, y+40 );
dc.SetPen( wxPen( wxT("black"), width, wxLONG_DASH) );
dc.DrawLine( x+20, y+50, 100, y+50 );
dc.SetPen( wxPen( wxT("black"), width, wxDOT_DASH) );
dc.DrawLine( x+20, y+60, 100, y+60 );
dc.DrawText("Misc hatches", x + 150, y + 70);
dc.SetPen( wxPen( wxT("black"), width, wxBDIAGONAL_HATCH) );
dc.DrawLine( x+20, y+70, 100, y+70 );
dc.SetPen( wxPen( wxT("black"), width, wxCROSSDIAG_HATCH) );
dc.DrawLine( x+20, y+80, 100, y+80 );
dc.SetPen( wxPen( wxT("black"), width, wxFDIAGONAL_HATCH) );
dc.DrawLine( x+20, y+90, 100, y+90 );
dc.SetPen( wxPen( wxT("black"), width, wxCROSS_HATCH) );
dc.DrawLine( x+20, y+100, 100, y+100 );
dc.SetPen( wxPen( wxT("black"), width, wxHORIZONTAL_HATCH) );
dc.DrawLine( x+20, y+110, 100, y+110 );
dc.SetPen( wxPen( wxT("black"), width, wxVERTICAL_HATCH) );
dc.DrawLine( x+20, y+120, 100, y+120 );
dc.DrawText("User dash", x + 150, y + 140);
wxPen ud( wxT("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] = 0x7F;
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__) && !(defined __WXMGL__)
// not implemented in wxGTK or wxMOTIF :-(
dc.FloodFill(0, 0, wxColour(255, 0, 0));
#endif //
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.Ok())
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 );
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);
// 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 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 );
// use wxSWISS_FONT and not wxNORMAL_FONT as the latter can't be rotated
// under Win9x (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( 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( wxT("Dimensions are length %ld, height %ld, descent %ld"), 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);
dc.DrawText( "There should be no text below", 110, 150 );
dc.DrawRectangle( 110, y, 100, height );
// twice drawn inverted should result in invisible
y += height;
dc.DrawText( "Invisible text", 110, y );
dc.DrawRectangle( 110, y, 100, height );
dc.DrawText( "Invisible text", 110, y );
dc.DrawRectangle( 110, y, 100, height );
dc.SetLogicalFunction(wxCOPY);
y += height;
dc.DrawRectangle( 110, y, 100, height );
dc.DrawText( "Visible text", 110, y );
}
static const struct
{
const wxChar *name;
int 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)
{
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::DrawCircles(wxDC& dc)
{
int x = 100,
y = 100,
r = 20;
dc.DrawText("Some circles", 0, y);
dc.DrawCircle(x, y, r);
dc.DrawCircle(x + 2*r, y, r);
dc.DrawCircle(x + 4*r, y, r);
y += 2*r;
dc.DrawText("And ellipses", 0, y);
dc.DrawEllipse(x - r, y, 2*r, r);
dc.DrawEllipse(x + r, y, 2*r, r);
dc.DrawEllipse(x + 3*r, y, 2*r, r);
y += 2*r;
dc.DrawText("And arcs", 0, y);
dc.DrawArc(x - r, y, x + r, y, x, y);
dc.DrawArc(x + 4*r, y, x + 2*r, y, x + 3*r, y);
dc.DrawArc(x + 5*r, y, x + 5*r, y, x + 6*r, y);
y += 2*r;
dc.DrawEllipticArc(x - r, y, 2*r, r, 0, 90);
dc.DrawEllipticArc(x + r, y, 2*r, r, 90, 180);
dc.DrawEllipticArc(x + 3*r, y, 2*r, r, 180, 270);
dc.DrawEllipticArc(x + 5*r, y, 2*r, r, 270, 360);
}
void MyCanvas::DrawRegions(wxDC& dc)
{
dc.DrawText("You should see a red rect partly covered by a cyan one "
"on the left", 10, 5);
dc.DrawText("and 5 smileys from which 4 are partially clipped on the right",
10, 5 + dc.GetCharHeight());
dc.DrawText("The second copy should be identical but right part of it "
"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 ( !firstTime )
region.Offset(10, 10);
dc.SetClippingRegion(region);
dc.SetBrush( *wxGREY_BRUSH );
dc.DrawRectangle( x, y, 310, 310 );
if (m_smile_bmp.Ok())
{
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::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_Circles:
DrawCircles(dc);
break;
case Show_Regions:
DrawRegions(dc);
break;
case Show_Text:
DrawText(dc);
break;
case Show_Lines:
DrawTestLines( 0, 100, 0, dc );
DrawTestLines( 0, 320, 1, dc );
DrawTestLines( 0, 540, 2, dc );
DrawTestLines( 0, 760, 6, dc );
break;
case Show_Brushes:
DrawTestBrushes(dc);
break;
case Show_Polygons:
DrawTestPoly(dc);
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( wxT("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,
wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE)
{
// 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_ShowBrushes, "&Brushes screen\tF4");
menuFile->Append(File_ShowPolygons, "&Polygons screen\tF5");
menuFile->Append(File_ShowMask, "&Mask screen\tF6");
menuFile->Append(File_ShowOps, "&ROP screen\tF7");
menuFile->Append(File_ShowRegions, "Re&gions screen\tF8");
menuFile->Append(File_ShowCircles, "&Circles screen\tF9");
menuFile->AppendSeparator();
menuFile->Append(File_About, "&About...\tCtrl-A", "Show about dialog");
menuFile->AppendSeparator();
menuFile->Append(File_Quit, "E&xit\tAlt-X", "Quit this program");
wxMenu *menuMapMode = new wxMenu;
menuMapMode->Append( MapMode_Text, "&TEXT map mode" );
menuMapMode->Append( MapMode_Lometric, "&LOMETRIC map mode" );
menuMapMode->Append( MapMode_Twips, "T&WIPS map mode" );
menuMapMode->Append( MapMode_Points, "&POINTS map mode" );
menuMapMode->Append( MapMode_Metric, "&METRIC map mode" );
wxMenu *menuUserScale = new wxMenu;
menuUserScale->Append( UserScale_StretchHoriz, "Stretch &horizontally\tCtrl-H" );
menuUserScale->Append( UserScale_ShrinkHoriz, "Shrin&k horizontally\tCtrl-G" );
menuUserScale->Append( UserScale_StretchVertic, "Stretch &vertically\tCtrl-V" );
menuUserScale->Append( UserScale_ShrinkVertic, "&Shrink vertically\tCtrl-W" );
menuUserScale->AppendSeparator();
menuUserScale->Append( UserScale_Restore, "&Restore to normal\tCtrl-0" );
wxMenu *menuAxis = new wxMenu;
menuAxis->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" );
menuLogical->AppendSeparator();
menuLogical->Append( LogicalOrigin_Set, "Set to (&100, 100)\tShift-Ctrl-1" );
menuLogical->Append( LogicalOrigin_Restore, "&Restore to normal\tShift-Ctrl-0" );
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 back&ground\tCtrl-T", "", TRUE);
// now append the freshly created menu to the menu bar...
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append(menuFile, "&File");
menuBar->Append(menuMapMode, "&Mode");
menuBar->Append(menuUserScale, "&Scale");
menuBar->Append(menuAxis, "&Axis");
menuBar->Append(menuLogical, "&Origin");
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( 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, "About Drawing", wxOK | wxICON_INFORMATION, this);
}
void MyFrame::OnShow(wxCommandEvent& event)
{
m_canvas->Show((ScreenToShow)(event.GetId() - MenuShow_First));
}
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;
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.SetLogicalOrigin( m_xLogicalOrigin, m_yLogicalOrigin );
dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed );
dc.SetUserScale( m_xUserScale, m_yUserScale );
dc.SetMapMode( m_mapMode );
}
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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