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