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 #import <AppKit/NSColor.h>
  18 #import <AppKit/NSGraphicsContext.h>
  19 #import <AppKit/NSBezierPath.h>
  20
  21 /*
  22  * wxWindowDC
  23  */
  24 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  25
  26 wxWindowDC::wxWindowDC(void)
  27 :   m_window(NULL)
  28 {
  29 };
  30
  31 wxWindowDC::wxWindowDC( wxWindow *window )
  32 :   m_window(window)
  33 {
  34     wxFAIL_MSG("non-client window DC's are not supported");
  35 };
  36
  37 wxWindowDC::~wxWindowDC(void)
  38 {
  39 };
  40
  41 void wxWindowDC::Clear()
  42 {
  43     wxASSERT(m_window);
  44
  45     NSGraphicsContext *context = [NSGraphicsContext currentContext];
  46     [context saveGraphicsState];
  47
  48     [m_backgroundBrush.GetNSColor() set];
  49     [NSBezierPath fillRect:[m_window->GetNSView() bounds]];
  50
  51     [context restoreGraphicsState];
  52 }
  53
  54 /*
  55  * wxClientDC
  56  */
  57 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
  58
  59 wxClientDC::wxClientDC(void)
  60 {
  61 };
  62
  63 wxClientDC::wxClientDC( wxWindow *window )
  64 {
  65     m_window = window;
  66 };
  67
  68 wxClientDC::~wxClientDC(void)
  69 {
  70 };
  71
  72 /*
  73  * wxPaintDC
  74  */
  75 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
  76
  77 wxPaintDC::wxPaintDC(void)
  78 {
  79 };
  80
  81 wxPaintDC::wxPaintDC( wxWindow *window )
  82 {
  83     m_window = window;
  84     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");
  85     // This transform flips the graphics since wxDC uses top-left origin
  86     if(![window->GetNSView() isFlipped])
  87     {
  88         // The transform is auto released
  89         NSAffineTransform *transform = [NSAffineTransform transform];
  90         /*  x' = 1x + 0y + 0
  91             y' = 0x + -1y + window's height
  92         */
  93         NSAffineTransformStruct matrix = {
  94             1,  0
  95         ,   0, -1
  96         ,   0, [window->GetNSView() bounds].size.height
  97         };
  98         [transform setTransformStruct: matrix];
  99         // Apply the transform
 100         [transform concat];
 101     }
 102     // TODO: Apply scaling transformation
 103 };
 104
 105 wxPaintDC::~wxPaintDC(void)
 106 {
 107 };
 108