src/osx/carbon/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/carbon/dcclient.cpp
   3 // Purpose:     wxClientDCImpl class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/dcclient.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/log.h"
  18     #include "wx/window.h"
  19     #include "wx/dcmemory.h"
  20     #include "wx/settings.h"
  21     #include "wx/toplevel.h"
  22     #include "wx/math.h"
  23     #include "wx/region.h"
  24 #endif
  25
  26 #include "wx/graphics.h"
  27 #include "wx/rawbmp.h"
  28 #include "wx/osx/private.h"
  29 #include "wx/osx/dcclient.h"
  30
  31 //-----------------------------------------------------------------------------
  32 // wxWindowDCImpl
  33 //-----------------------------------------------------------------------------
  34
  35 IMPLEMENT_ABSTRACT_CLASS(wxWindowDCImpl, wxGCDCImpl)
  36
  37 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner )
  38    : wxGCDCImpl( owner )
  39 {
  40     m_release = false;
  41 }
  42
  43
  44 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window )
  45    : wxGCDCImpl( owner )
  46 {
  47     m_window = window;
  48
  49     m_ok = true ;
  50
  51     m_window->GetSize( &m_width , &m_height);
  52     if ( !m_window->IsShownOnScreen() )
  53         m_width = m_height = 0;
  54
  55     CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
  56
  57     m_release = false;
  58     if ( cg == NULL )
  59     {
  60         SetGraphicsContext( wxGraphicsContext::Create( window ) ) ;
  61     }
  62     else
  63     {
  64         CGContextSaveGState( cg );
  65         m_release = true ;
  66         // make sure the context is having its origin at the wx-window coordinates of the
  67         // view (read at the top of window.cpp about the differences)
  68         if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
  69             CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
  70
  71         SetGraphicsContext( wxGraphicsContext::CreateFromNative( cg ) );
  72     }
  73     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
  74
  75     SetBackground(wxBrush(window->GetBackgroundColour(),wxSOLID));
  76
  77     SetFont( window->GetFont() ) ;
  78 }
  79
  80 wxWindowDCImpl::~wxWindowDCImpl()
  81 {
  82     if ( m_release )
  83     {
  84         // this must not necessarily be the current context, we must restore the state of the
  85         // cg we started with above (before the CGContextTranslateCTM call)
  86         CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
  87         CGContextRestoreGState(cg);
  88     }
  89 }
  90
  91 void wxWindowDCImpl::DoGetSize( int* width, int* height ) const
  92 {
  93     if ( width )
  94         *width = m_width;
  95     if ( height )
  96         *height = m_height;
  97 }
  98
  99 #if wxOSX_USE_CARBON
 100 wxBitmap wxWindowDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 101 {
 102     // wxScreenDC is derived from wxWindowDC, so a screen dc will
 103     // call this method when a Blit is performed with it as a source.
 104     if (!m_window)
 105         return wxNullBitmap;
 106
 107     ControlRef handle = (ControlRef) m_window->GetHandle();
 108     if ( !handle )
 109         return wxNullBitmap;
 110
 111     HIRect rect;
 112     CGImageRef image;
 113     CGContextRef context;
 114
 115     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 116
 117
 118     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 119     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 120
 121     wxBitmap bmp = wxBitmap(width, height, 32);
 122
 123     context = (CGContextRef)bmp.GetHBITMAP();
 124
 125     CGContextSaveGState(context);
 126
 127     CGContextTranslateCTM( context, 0,  height );
 128     CGContextScaleCTM( context, 1, -1 );
 129
 130     if ( subrect )
 131         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 132     CGContextDrawImage( context, rect, image );
 133
 134     CGContextRestoreGState(context);
 135     return bmp;
 136 }
 137 #endif
 138
 139 /*
 140  * wxClientDCImpl
 141  */
 142
 143 IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
 144
 145 wxClientDCImpl::wxClientDCImpl( wxDC *owner )
 146  : wxWindowDCImpl( owner )
 147 {
 148 }
 149
 150 wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
 151     wxWindowDCImpl( owner, window )
 152 {
 153     wxCHECK_RET( window, wxT("invalid window in wxClientDCImpl") );
 154     wxPoint origin = window->GetClientAreaOrigin() ;
 155     m_window->GetClientSize( &m_width , &m_height);
 156     if ( !m_window->IsShownOnScreen() )
 157         m_width = m_height = 0;
 158     SetDeviceOrigin( origin.x, origin.y );
 159     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 160 }
 161
 162 wxClientDCImpl::~wxClientDCImpl()
 163 {
 164     if( GetGraphicsContext() && GetGraphicsContext()->GetNativeContext() )
 165         Flush();
 166 }
 167
 168 /*
 169  * wxPaintDCImpl
 170  */
 171
 172 IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxWindowDCImpl)
 173
 174 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner )
 175  : wxWindowDCImpl( owner )
 176 {
 177 }
 178
 179 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner, wxWindow *window ) :
 180     wxWindowDCImpl( owner, window )
 181 {
 182     wxASSERT_MSG( window->MacGetCGContextRef() != NULL, wxT("using wxPaintDC without being in a native paint event") );
 183     wxPoint origin = window->GetClientAreaOrigin() ;
 184     m_window->GetClientSize( &m_width , &m_height);
 185     SetDeviceOrigin( origin.x, origin.y );
 186     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 187 }
 188
 189 wxPaintDCImpl::~wxPaintDCImpl()
 190 {
 191 }