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         CocoaApplyTransformations();
  55         m_lockedNSView = nsview;
  56         return true;
  57     }
  58     wxLogDebug(wxT("focus lock failed!"));
  59     return false;
  60 }
  61
  62 bool wxWindowDC::CocoaUnlockFocusOnNSView()
  63 {
  64     [[m_lockedNSView window] flushWindow];
  65     [m_lockedNSView unlockFocus];
  66     m_lockedNSView = NULL;
  67     return true;
  68 }
  69
  70 bool wxWindowDC::CocoaLockFocus()
  71 {
  72     wxLogTrace(wxTRACE_COCOA,wxT("Locking focus on wxWindowDC=%p, NSView=%p"),this, m_window->GetNonClientNSView());
  73     NSAffineTransform *newTransform = CocoaGetWxToBoundsTransform([m_window->GetNonClientNSView() isFlipped], [m_window->GetNonClientNSView() bounds].size.height);
  74     [newTransform retain];
  75     [m_cocoaWxToBoundsTransform release];
  76     m_cocoaWxToBoundsTransform = newTransform;
  77     return CocoaLockFocusOnNSView(m_window->GetNonClientNSView());
  78 }
  79
  80 bool wxWindowDC::CocoaUnlockFocus()
  81 {
  82     wxLogTrace(wxTRACE_COCOA,wxT("Unlocking focus on wxWindowDC=%p, NSView=%p"),this, m_window->GetNonClientNSView());
  83     return CocoaUnlockFocusOnNSView();
  84 }
  85
  86 bool wxWindowDC::CocoaGetBounds(void *rectData)
  87 {
  88     if(!rectData)
  89         return false;
  90     if(!m_lockedNSView)
  91         return false;
  92     NSRect *pRect = (NSRect*)rectData;
  93     *pRect = [m_lockedNSView bounds];
  94     return true;
  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     NSAffineTransform *newTransform = m_window->CocoaGetWxToBoundsTransform();
 120     [newTransform retain];
 121     [m_cocoaWxToBoundsTransform release];
 122     m_cocoaWxToBoundsTransform = newTransform;
 123     return CocoaLockFocusOnNSView(m_window->GetNSView());
 124 }
 125
 126 bool wxClientDC::CocoaUnlockFocus()
 127 {
 128     wxLogTrace(wxTRACE_COCOA,wxT("Unlocking focus on wxClientDC=%p, NSView=%p"),this, m_window->GetNSView());
 129     return CocoaUnlockFocusOnNSView();
 130 }
 131
 132 /*
 133  * wxPaintDC
 134  */
 135 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
 136
 137 wxPaintDC::wxPaintDC(void)
 138 {
 139 };
 140
 141 wxPaintDC::wxPaintDC( wxWindow *window )
 142 {
 143     m_window = window;
 144     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"));
 145     sm_cocoaDCStack.Insert(this);
 146     m_lockedNSView = window->GetNSView();
 147     NSAffineTransform *newTransform = window->CocoaGetWxToBoundsTransform();
 148     [newTransform retain];
 149     [m_cocoaWxToBoundsTransform release];
 150     m_cocoaWxToBoundsTransform = newTransform;
 151     CocoaApplyTransformations();
 152 };
 153
 154 wxPaintDC::~wxPaintDC(void)
 155 {
 156     CocoaUnwindStackAndLoseFocus();
 157 };
 158
 159 bool wxPaintDC::CocoaLockFocus()
 160 {
 161     wxFAIL_MSG(wxT("wxPaintDC cannot be asked to lock focus!"));
 162     return false;
 163 }
 164
 165 bool wxPaintDC::CocoaUnlockFocus()
 166 {
 167     // wxPaintDC focus can never be unlocked.
 168     return false;
 169 }
 170