src/cocoa/dcclient.mm

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/cocoa/dcclient.mm
   3 // Purpose:     wxWindowDC, wxPaintDC, and wxClientDC classes
   4 // Author:      David Elliott
   5 // Modified by:
   6 // Created:     2003/04/01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 David Elliott
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/dcclient.h"
  13 #include "wx/window.h"
  14
  15 #import <AppKit/NSView.h>
  16 #import <AppKit/NSAffineTransform.h>
  17
  18 /*
  19  * wxWindowDC
  20  */
  21 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  22
  23 wxWindowDC::wxWindowDC(void)
  24 {
  25 };
  26
  27 wxWindowDC::wxWindowDC( wxWindow *window )
  28 {
  29     wxFAIL_MSG("non-client window DC's are not supported");
  30 };
  31
  32 wxWindowDC::~wxWindowDC(void)
  33 {
  34 };
  35
  36 /*
  37  * wxClientDC
  38  */
  39 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
  40
  41 wxClientDC::wxClientDC(void)
  42 {
  43 };
  44
  45 wxClientDC::wxClientDC( wxWindow *window )
  46 {
  47 };
  48
  49 wxClientDC::~wxClientDC(void)
  50 {
  51 };
  52
  53 /*
  54  * wxPaintDC
  55  */
  56 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
  57
  58 wxPaintDC::wxPaintDC(void)
  59 {
  60 };
  61
  62 wxPaintDC::wxPaintDC( wxWindow *window )
  63 {
  64     wxASSERT_MSG(!sm_focusedDC,"Found another wxDC with focus.  Do not use wxPaintDC outside of paint handlers!");
  65     wxASSERT_MSG([NSView focusView]==window->GetNSView(), "PaintDC's NSView does not have focus.  Please use wxPaintDC only as the first DC created in a paint handler");
  66     sm_focusedDC=this;
  67     // This transform flips the graphics since wxDC uses top-left origin
  68     if(![window->GetNSView() isFlipped])
  69     {
  70         // The transform is auto released
  71         NSAffineTransform *transform = [NSAffineTransform transform];
  72         /*  x' = 1x + 0y + 0
  73             y' = 0x + -1y + window's height
  74         */
  75         NSAffineTransformStruct matrix = {
  76             1,  0
  77         ,   0, -1
  78         ,   0, [window->GetNSView() bounds].size.height
  79         };
  80         [transform setTransformStruct: matrix];
  81         // Apply the transform
  82         [transform concat];
  83     }
  84     // TODO: Apply scaling transformation
  85 };
  86
  87 wxPaintDC::~wxPaintDC(void)
  88 {
  89     if(sm_focusedDC==this)
  90         sm_focusedDC=NULL;
  91 };
  92