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:     wxWidgets licence
  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 ,   m_lockedNSView(NULL)
  34 {
  35 };
  36
  37 wxWindowDC::wxWindowDC( wxWindow *window )
  38 :   m_window(window)
  39 ,   m_lockedNSView(NULL)
  40 {
  41     wxLogDebug(wxT("non-client window DC's are not supported, oh well"));
  42 };
  43
  44 wxWindowDC::~wxWindowDC(void)
  45 {
  46     CocoaUnwindStackAndLoseFocus();
  47 };
  48
  49 bool wxWindowDC::CocoaLockFocusOnNSView(WX_NSView nsview)
  50 {
  51     if([nsview lockFocusIfCanDraw])
  52     {
  53         sm_cocoaDCStack.Insert(this);
  54         m_cocoaFlipped = [nsview isFlipped];
  55         m_cocoaHeight = [nsview bounds].size.height;
  56         CocoaApplyTransformations();
  57         m_lockedNSView = nsview;
  58         return true;
  59     }
  60     wxLogDebug(wxT("focus lock failed!"));
  61     return false;
  62 }
  63
  64 bool wxWindowDC::CocoaUnlockFocusOnNSView()
  65 {
  66     [[m_lockedNSView window] flushWindow];
  67     [m_lockedNSView unlockFocus];
  68     m_lockedNSView = NULL;
  69     return true;
  70 }
  71
  72 bool wxWindowDC::CocoaLockFocus()
  73 {
  74     wxLogTrace(wxTRACE_COCOA,wxT("Locking focus on wxWindowDC=%p, NSView=%p"),this, m_window->GetNonClientNSView());
  75     return CocoaLockFocusOnNSView(m_window->GetNonClientNSView());
  76 }
  77
  78 bool wxWindowDC::CocoaUnlockFocus()
  79 {
  80     wxLogTrace(wxTRACE_COCOA,wxT("Unlocking focus on wxWindowDC=%p, NSView=%p"),this, m_window->GetNonClientNSView());
  81     return CocoaUnlockFocusOnNSView();
  82 }
  83
  84 void wxWindowDC::Clear()
  85 {
  86     if(!CocoaTakeFocus()) return;
  87
  88     NSGraphicsContext *context = [NSGraphicsContext currentContext];
  89     [context saveGraphicsState];
  90
  91     [m_backgroundBrush.GetNSColor() set];
  92     [NSBezierPath fillRect:[m_lockedNSView bounds]];
  93
  94     [context restoreGraphicsState];
  95 }
  96
  97 /*
  98  * wxClientDC
  99  */
 100 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
 101
 102 wxClientDC::wxClientDC(void)
 103 {
 104 };
 105
 106 wxClientDC::wxClientDC( wxWindow *window )
 107 {
 108     m_window = window;
 109 };
 110
 111 wxClientDC::~wxClientDC(void)
 112 {
 113     CocoaUnwindStackAndLoseFocus();
 114 };
 115
 116 bool wxClientDC::CocoaLockFocus()
 117 {
 118     wxLogTrace(wxTRACE_COCOA,wxT("Locking focus on wxClientDC=%p, NSView=%p"),this, m_window->GetNSView());
 119     return CocoaLockFocusOnNSView(m_window->GetNSView());
 120 }
 121
 122 bool wxClientDC::CocoaUnlockFocus()
 123 {
 124     wxLogTrace(wxTRACE_COCOA,wxT("Unlocking focus on wxClientDC=%p, NSView=%p"),this, m_window->GetNSView());
 125     return CocoaUnlockFocusOnNSView();
 126 }
 127
 128 /*
 129  * wxPaintDC
 130  */
 131 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
 132
 133 wxPaintDC::wxPaintDC(void)
 134 {
 135 };
 136
 137 wxPaintDC::wxPaintDC( wxWindow *window )
 138 {
 139     m_window = window;
 140     wxASSERT_MSG([NSView focusView]==window->GetNSView(), wxT("PaintDC's NSView does not have focus.  Please use wxPaintDC only as the first DC created in a paint handler"));
 141     sm_cocoaDCStack.Insert(this);
 142     m_lockedNSView = window->GetNSView();
 143     m_cocoaFlipped = [window->GetNSView() isFlipped];
 144     m_cocoaHeight = [window->GetNSView() bounds].size.height;
 145     CocoaApplyTransformations();
 146 };
 147
 148 wxPaintDC::~wxPaintDC(void)
 149 {
 150     CocoaUnwindStackAndLoseFocus();
 151 };
 152
 153 bool wxPaintDC::CocoaLockFocus()
 154 {
 155     wxFAIL_MSG(wxT("wxPaintDC cannot be asked to lock focus!"));
 156     return false;
 157 }
 158
 159 bool wxPaintDC::CocoaUnlockFocus()
 160 {
 161     // wxPaintDC focus can never be unlocked.
 162     return false;
 163 }
 164