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Check for null return value in wxClientDC constructor
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1/////////////////////////////////////////////////////////////////////////////
2// Name: dcclient.cpp
3// Purpose: wxClientDC class
4// Author: AUTHOR
5// Modified by:
6// Created: 01/02/97
7// RCS-ID: $Id$
8// Copyright: (c) AUTHOR
9// Licence: wxWindows licence
10/////////////////////////////////////////////////////////////////////////////
11
12#ifdef __GNUG__
13#pragma implementation "dcclient.h"
14#endif
15
16#include "wx/dcclient.h"
17#include "wx/dcmemory.h"
18#include "wx/region.h"
19#include "wx/window.h"
20#include "wx/toplevel.h"
21#include <math.h>
22#include "wx/mac/private.h"
23
24//-----------------------------------------------------------------------------
25// constants
26//-----------------------------------------------------------------------------
27
28#define RAD2DEG 57.2957795131
29
30//-----------------------------------------------------------------------------
31// wxPaintDC
32//-----------------------------------------------------------------------------
33
34#if !USE_SHARED_LIBRARY
35IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
36IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
37IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
38#endif
39
40/*
41 * wxWindowDC
42 */
43
44#include "wx/mac/uma.h"
45
46wxWindowDC::wxWindowDC()
47{
48}
49
50wxWindowDC::wxWindowDC(wxWindow *the_canvas)
51{
52 wxTopLevelWindowMac* rootwindow = the_canvas->MacGetTopLevelWindow() ;
53 WindowRef windowref = (WindowRef) rootwindow->MacGetWindowRef() ;
54
55 int x , y ;
56 x = y = 0 ;
57 the_canvas->MacWindowToRootWindow( &x , &y ) ;
58 m_macLocalOrigin.x = x ;
59 m_macLocalOrigin.y = y ;
60 CopyRgn( (RgnHandle) the_canvas->MacGetVisibleRegion().GetWXHRGN() , (RgnHandle) m_macBoundaryClipRgn ) ;
61 OffsetRgn( (RgnHandle) m_macBoundaryClipRgn , m_macLocalOrigin.x , m_macLocalOrigin.y ) ;
62 CopyRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn ) ;
63 m_macPort = UMAGetWindowPort( windowref ) ;
64 m_minY = m_minX = 0;
65 wxSize size = the_canvas->GetSize() ;
66 m_maxX = size.x ;
67 m_maxY = size.y ;
68
69 m_ok = TRUE ;
70 SetBackground(the_canvas->MacGetBackgroundBrush());
71}
72
73wxWindowDC::~wxWindowDC()
74{
75}
76
77/*
78 * wxClientDC
79 */
80
81wxClientDC::wxClientDC()
82{
83}
84
85wxClientDC::wxClientDC(wxWindow *window)
86{
87 wxTopLevelWindowMac* rootwindow = window->MacGetTopLevelWindow() ;
88 if (!rootwindow)
89 return;
90 WindowRef windowref = (WindowRef) rootwindow->MacGetWindowRef() ;
91 wxPoint origin = window->GetClientAreaOrigin() ;
92 wxSize size = window->GetClientSize() ;
93 int x , y ;
94 x = origin.x ;
95 y = origin.y ;
96 window->MacWindowToRootWindow( &x , &y ) ;
97 m_macLocalOrigin.x = x ;
98 m_macLocalOrigin.y = y ;
99 SetRectRgn( (RgnHandle) m_macBoundaryClipRgn , origin.x , origin.y , origin.x + size.x , origin.y + size.y ) ;
100 SectRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) window->MacGetVisibleRegion().GetWXHRGN() , (RgnHandle) m_macBoundaryClipRgn ) ;
101 OffsetRgn( (RgnHandle) m_macBoundaryClipRgn , -origin.x , -origin.y ) ;
102 OffsetRgn( (RgnHandle) m_macBoundaryClipRgn , m_macLocalOrigin.x , m_macLocalOrigin.y ) ;
103 CopyRgn( (RgnHandle) m_macBoundaryClipRgn ,(RgnHandle) m_macCurrentClipRgn ) ;
104 m_macPort = UMAGetWindowPort( windowref ) ;
105 m_minY = m_minX = 0;
106 m_maxX = size.x ;
107 m_maxY = size.y ;
108 m_ok = TRUE ;
109 SetBackground(window->MacGetBackgroundBrush());
110 SetFont( window->GetFont() ) ;
111}
112
113wxClientDC::~wxClientDC()
114{
115}
116
117/*
118 * wxPaintDC
119 */
120
121wxPaintDC::wxPaintDC()
122{
123}
124
125wxPaintDC::wxPaintDC(wxWindow *window)
126{
127 wxTopLevelWindowMac* rootwindow = window->MacGetTopLevelWindow() ;
128 WindowRef windowref = (WindowRef) rootwindow->MacGetWindowRef() ;
129 wxPoint origin = window->GetClientAreaOrigin() ;
130 wxSize size = window->GetClientSize() ;
131 int x , y ;
132 x = origin.x ;
133 y = origin.y ;
134 window->MacWindowToRootWindow( &x , &y ) ;
135 m_macLocalOrigin.x = x ;
136 m_macLocalOrigin.y = y ;
137 SetRectRgn( (RgnHandle) m_macBoundaryClipRgn , origin.x , origin.y , origin.x + size.x , origin.y + size.y ) ;
138 SectRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) window->MacGetVisibleRegion().GetWXHRGN() , (RgnHandle) m_macBoundaryClipRgn ) ;
139 OffsetRgn( (RgnHandle) m_macBoundaryClipRgn , -origin.x , -origin.y ) ;
140 SectRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) window->GetUpdateRegion().GetWXHRGN() , (RgnHandle) m_macBoundaryClipRgn ) ;
141 OffsetRgn( (RgnHandle) m_macBoundaryClipRgn , m_macLocalOrigin.x , m_macLocalOrigin.y ) ;
142 CopyRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn ) ;
143 m_macPort = UMAGetWindowPort( windowref ) ;
144 m_minY = m_minX = 0;
145 m_maxX = size.x ;
146 m_maxY = size.y ;
147 m_ok = TRUE ;
148 SetBackground(window->MacGetBackgroundBrush());
149 SetFont( window->GetFont() ) ;
150}
151
152wxPaintDC::~wxPaintDC()
153{
154}