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/wxprec.h"
  13 #ifndef WX_PRECOMP
  14     #include "wx/log.h"
  15     #include "wx/window.h"
  16     #include "wx/dcclient.h"
  17 #endif //WX_PRECOMP
  18
  19 #import <AppKit/NSView.h>
  20 #import <AppKit/NSAffineTransform.h>
  21 #import <AppKit/NSColor.h>
  22 #import <AppKit/NSGraphicsContext.h>
  23 #import <AppKit/NSBezierPath.h>
  24 #import <AppKit/NSWindow.h>
  25
  26 /*
  27  * wxWindowDC
  28  */
  29 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  30
  31 wxWindowDC::wxWindowDC(void)
  32 :   m_window(NULL)
  33 {
  34 };
  35
  36 wxWindowDC::wxWindowDC( wxWindow *window )
  37 :   m_window(window)
  38 {
  39     wxFAIL_MSG("non-client window DC's are not supported");
  40 };
  41
  42 wxWindowDC::~wxWindowDC(void)
  43 {
  44 };
  45
  46 void wxWindowDC::Clear()
  47 {
  48     wxASSERT(m_window);
  49
  50     NSGraphicsContext *context = [NSGraphicsContext currentContext];
  51     [context saveGraphicsState];
  52
  53     [m_backgroundBrush.GetNSColor() set];
  54     [NSBezierPath fillRect:[m_window->GetNSView() bounds]];
  55
  56     [context restoreGraphicsState];
  57 }
  58
  59 /*
  60  * wxClientDC
  61  */
  62 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
  63
  64 wxClientDC::wxClientDC(void)
  65 {
  66 };
  67
  68 wxClientDC::wxClientDC( wxWindow *window )
  69 {
  70     m_window = window;
  71 };
  72
  73 wxClientDC::~wxClientDC(void)
  74 {
  75     CocoaUnwindStackAndLoseFocus();
  76 };
  77
  78 bool wxClientDC::CocoaLockFocus()
  79 {
  80     wxLogDebug("Locking focus on wxClientDC=%p, NSView=%p",this, m_window->GetNSView());
  81     if([m_window->GetNSView() lockFocusIfCanDraw])
  82     {
  83         sm_cocoaDCStack.Insert(this);
  84         m_cocoaFlipped = [m_window->GetNSView() isFlipped];
  85         m_cocoaHeight = [m_window->GetNSView() bounds].size.height;
  86         CocoaApplyTransformations();
  87         return true;
  88     }
  89     wxLogDebug("focus lock failed!");
  90     return false;
  91 }
  92
  93 bool wxClientDC::CocoaUnlockFocus()
  94 {
  95     wxLogDebug("Unlocking focus on wxClientDC=%p, NSView=%p",this, m_window->GetNSView());
  96     [[m_window->GetNSView() window] flushWindow];
  97     [m_window->GetNSView() unlockFocus];
  98     return true;
  99 }
 100
 101 /*
 102  * wxPaintDC
 103  */
 104 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
 105
 106 wxPaintDC::wxPaintDC(void)
 107 {
 108 };
 109
 110 wxPaintDC::wxPaintDC( wxWindow *window )
 111 {
 112     m_window = window;
 113     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");
 114     sm_cocoaDCStack.Insert(this);
 115     m_cocoaFlipped = [window->GetNSView() isFlipped];
 116     m_cocoaHeight = [window->GetNSView() bounds].size.height;
 117     CocoaApplyTransformations();
 118 };
 119
 120 wxPaintDC::~wxPaintDC(void)
 121 {
 122     CocoaUnwindStackAndLoseFocus();
 123 };
 124
 125 bool wxPaintDC::CocoaLockFocus()
 126 {
 127     wxFAIL_MSG("wxPaintDC cannot be asked to lock focus!");
 128     return false;
 129 }
 130
 131 bool wxPaintDC::CocoaUnlockFocus()
 132 {
 133     // wxPaintDC focus can never be unlocked.
 134     return false;
 135 }
 136