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wxWidgets/samples/drawing/drawing.cpp
Vadim Zeitlin 9a8c762076 1. many DrawRotatedText() corrections (gtk) 
2. compilation fix for window.cpp (!HAVE_XIM)
3. mentioned wxGTK slider limitations in the docs


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4866 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-12-08 08:19:45 +00:00

547 lines
17 KiB
C++
Raw Blame History

/////////////////////////////////////////////////////////////////////////////
// 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"
// ----------------------------------------------------------------------------
// ressources
// ----------------------------------------------------------------------------
// the application icon
#if defined(__WXGTK__) || defined(__WXMOTIF__)
#include "mondrian.xpm"
#endif
// ----------------------------------------------------------------------------
// 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();
};
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 OnOption(wxCommandEvent &event);
wxColour SelectColour();
void PrepareDC(wxDC& dc);
int m_backgroundMode;
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 DrawTestLines( int x, int y, int width, wxDC &dc );
void OnPaint(wxPaintEvent &event);
void OnMouseMove(wxMouseEvent &event);
protected:
MyFrame *m_owner;
private:
DECLARE_EVENT_TABLE()
};
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// IDs for the controls and the menu commands
enum
{
// menu items
Minimal_Quit = 1,
Minimal_About,
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,
MenuOption_Last = Colour_BackgroundMode
};
// ----------------------------------------------------------------------------
// 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
// ----------------------------------------------------------------------------
// `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);
// success: wxApp::OnRun() will be called which will enter the main message
// loop and the application will run. If we returned FALSE here, the
// application would exit immediately.
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;
}
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::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 );
// 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 //
// 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", 60, 30, -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 );
dc.DrawRectangle( 100, 40, 4, height );
text.Printf( "CharHeight() returns: %d", dc.GetCharHeight() );
dc.DrawText( text, 110, 120 );
dc.DrawIcon( wxICON(mondrian), 310, 40 );
DrawTestLines( 0, 200, 0, dc );
DrawTestLines( 0, 400, 1, dc );
DrawTestLines( 0, 600, 2, dc );
DrawTestLines( 0, 800, 6, dc );
}
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 (Minimal_Quit, MyFrame::OnQuit)
EVT_MENU (Minimal_About, MyFrame::OnAbout)
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(Minimal_About, "&About...\tCtrl-A", "Show about dialog");
menuFile->AppendSeparator();
menuFile->Append(Minimal_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 );
// 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_canvas = new MyCanvas( this );
m_canvas->SetScrollbars( 10, 10, 100, 200 );
}
// 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::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;
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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