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         SetDeviceOrigin(-window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize());
  62     }
  63     else
  64     {
  65         CGContextSaveGState( cg );
  66         m_release = true ;
  67         // make sure the context is having its origin at the wx-window coordinates of the
  68         // view (read at the top of window.cpp about the differences)
  69         if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
  70             CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
  71
  72         wxGraphicsContext* context = wxGraphicsContext::CreateFromNative( cg );
  73         context->EnableOffset(true);
  74         SetGraphicsContext( context );
  75     }
  76     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
  77
  78     SetBackground(wxBrush(window->GetBackgroundColour(),wxSOLID));
  79
  80     SetFont( window->GetFont() ) ;
  81 }
  82
  83 wxWindowDCImpl::~wxWindowDCImpl()
  84 {
  85     if ( m_release )
  86     {
  87         // this must not necessarily be the current context, we must restore the state of the
  88         // cg we started with above (before the CGContextTranslateCTM call)
  89         CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
  90         CGContextRestoreGState(cg);
  91     }
  92 }
  93
  94 void wxWindowDCImpl::DoGetSize( int* width, int* height ) const
  95 {
  96     if ( width )
  97         *width = m_width;
  98     if ( height )
  99         *height = m_height;
 100 }
 101
 102 #if wxOSX_USE_CARBON
 103 wxBitmap wxWindowDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 104 {
 105     // wxScreenDC is derived from wxWindowDC, so a screen dc will
 106     // call this method when a Blit is performed with it as a source.
 107     if (!m_window)
 108         return wxNullBitmap;
 109
 110     ControlRef handle = (ControlRef) m_window->GetHandle();
 111     if ( !handle )
 112         return wxNullBitmap;
 113
 114     HIRect rect;
 115     CGImageRef image;
 116     CGContextRef context;
 117
 118     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 119
 120
 121     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 122     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 123
 124     wxBitmap bmp = wxBitmap(width, height, 32);
 125
 126     context = (CGContextRef)bmp.GetHBITMAP();
 127
 128     CGContextSaveGState(context);
 129
 130     CGContextTranslateCTM( context, 0,  height );
 131     CGContextScaleCTM( context, 1, -1 );
 132
 133     if ( subrect )
 134         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 135     CGContextDrawImage( context, rect, image );
 136
 137     CGContextRestoreGState(context);
 138     return bmp;
 139 }
 140 #endif
 141
 142 /*
 143  * wxClientDCImpl
 144  */
 145
 146 IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
 147
 148 wxClientDCImpl::wxClientDCImpl( wxDC *owner )
 149  : wxWindowDCImpl( owner )
 150 {
 151 }
 152
 153 wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
 154     wxWindowDCImpl( owner, window )
 155 {
 156     wxCHECK_RET( window, wxT("invalid window in wxClientDCImpl") );
 157     wxPoint origin = window->GetClientAreaOrigin() ;
 158     m_window->GetClientSize( &m_width , &m_height);
 159     if ( !m_window->IsShownOnScreen() )
 160         m_width = m_height = 0;
 161
 162     int x0,y0;
 163     DoGetDeviceOrigin(&x0,&y0);
 164     SetDeviceOrigin( origin.x + x0, origin.y + y0 );
 165
 166     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 167 }
 168
 169 wxClientDCImpl::~wxClientDCImpl()
 170 {
 171     if( GetGraphicsContext() && GetGraphicsContext()->GetNativeContext() )
 172         Flush();
 173 }
 174
 175 /*
 176  * wxPaintDCImpl
 177  */
 178
 179 IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxWindowDCImpl)
 180
 181 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner )
 182  : wxWindowDCImpl( owner )
 183 {
 184 }
 185
 186 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner, wxWindow *window ) :
 187     wxWindowDCImpl( owner, window )
 188 {
 189     wxASSERT_MSG( window->MacGetCGContextRef() != NULL, wxT("using wxPaintDC without being in a native paint event") );
 190     wxPoint origin = window->GetClientAreaOrigin() ;
 191     m_window->GetClientSize( &m_width , &m_height);
 192     SetDeviceOrigin( origin.x, origin.y );
 193     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 194 }
 195
 196 wxPaintDCImpl::~wxPaintDCImpl()
 197 {
 198 }