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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/osx/cocoa/overlay.mm
3 // Purpose: common wxOverlay code
4 // Author: Stefan Csomor
5 // Modified by:
6 // Created: 2006-10-20
7 // RCS-ID: $Id$
8 // Copyright: (c) wxWidgets team
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 // For compilers that support precompilation, includes "wx.h".
21 #include "wx/wxprec.h"
22
23 #ifdef __BORLANDC__
24 #pragma hdrstop
25 #endif
26
27 #include "wx/overlay.h"
28
29 #ifndef WX_PRECOMP
30 #include "wx/dcclient.h"
31 #endif
32
33 #include "wx/dcgraph.h"
34
35 #include "wx/private/overlay.h"
36
37 #ifdef wxHAS_NATIVE_OVERLAY
38
39 // ============================================================================
40 // implementation
41 // ============================================================================
42
43 wxOverlayImpl::wxOverlayImpl()
44 {
45 m_window = NULL ;
46 m_overlayContext = NULL ;
47 m_overlayWindow = NULL ;
48 }
49
50 wxOverlayImpl::~wxOverlayImpl()
51 {
52 Reset();
53 }
54
55 bool wxOverlayImpl::IsOk()
56 {
57 return m_overlayWindow != NULL ;
58 }
59
60 void wxOverlayImpl::CreateOverlayWindow()
61 {
62 if ( m_window )
63 {
64 m_overlayParentWindow = m_window->MacGetTopLevelWindowRef();
65 [m_overlayParentWindow makeKeyAndOrderFront:nil];
66
67 NSView* view = m_window->GetHandle();
68
69 NSPoint viewOriginBase, viewOriginScreen;
70 viewOriginBase = [view convertPoint:NSMakePoint(0, 0) toView:nil];
71 viewOriginScreen = [m_overlayParentWindow convertBaseToScreen:viewOriginBase];
72
73 NSSize viewSize = [view frame].size;
74 if ( [view isFlipped] )
75 viewOriginScreen.y -= viewSize.height;
76
77 m_overlayWindow=[[NSWindow alloc] initWithContentRect:NSMakeRect(viewOriginScreen.x,viewOriginScreen.y,
78 viewSize.width,
79 viewSize.height)
80 styleMask:NSBorderlessWindowMask
81 backing:NSBackingStoreBuffered
82 defer:YES];
83
84 [m_overlayParentWindow addChildWindow:m_overlayWindow ordered:NSWindowAbove];
85 }
86 else
87 {
88 m_overlayParentWindow = NULL ;
89 CGRect cgbounds ;
90 cgbounds = CGDisplayBounds(CGMainDisplayID());
91
92 m_overlayWindow=[[NSWindow alloc] initWithContentRect:NSMakeRect(cgbounds.origin.x,cgbounds.origin.y,
93 cgbounds.size.width,
94 cgbounds.size.height)
95 styleMask:NSBorderlessWindowMask
96 backing:NSBackingStoreBuffered
97 defer:YES];
98 }
99 [m_overlayWindow setOpaque:NO];
100 [m_overlayWindow setIgnoresMouseEvents:YES];
101 [m_overlayWindow setAlphaValue:1.0];
102
103 [m_overlayWindow orderFront:nil];
104 }
105
106 void wxOverlayImpl::Init( wxDC* dc, int x , int y , int width , int height )
107 {
108 wxASSERT_MSG( !IsOk() , _("You cannot Init an overlay twice") );
109
110 m_window = dc->GetWindow();
111 m_x = x ;
112 m_y = y ;
113 if ( dc->IsKindOf( CLASSINFO( wxClientDC ) ))
114 {
115 wxPoint origin = m_window->GetClientAreaOrigin();
116 m_x += origin.x;
117 m_y += origin.y;
118 }
119 m_width = width ;
120 m_height = height ;
121
122 CreateOverlayWindow();
123 wxASSERT_MSG( m_overlayWindow != NULL , _("Couldn't create the overlay window") );
124 m_overlayContext = (CGContextRef) [[m_overlayWindow graphicsContext] graphicsPort];
125 wxASSERT_MSG( m_overlayContext != NULL , _("Couldn't init the context on the overlay window") );
126
127 int ySize = 0;
128 if ( m_window )
129 {
130 NSView* view = m_window->GetHandle();
131 NSSize viewSize = [view frame].size;
132 ySize = viewSize.height;
133 }
134 else
135 {
136 CGRect cgbounds ;
137 cgbounds = CGDisplayBounds(CGMainDisplayID());
138 ySize = cgbounds.size.height;
139
140
141
142 }
143 CGContextTranslateCTM( m_overlayContext, 0, ySize );
144 CGContextScaleCTM( m_overlayContext, 1, -1 );
145 CGContextTranslateCTM( m_overlayContext, -m_x , -m_y );
146 }
147
148 void wxOverlayImpl::BeginDrawing( wxDC* dc)
149 {
150 wxDCImpl *impl = dc->GetImpl();
151 wxGCDCImpl *win_impl = wxDynamicCast(impl,wxGCDCImpl);
152 if (win_impl)
153 {
154 win_impl->SetGraphicsContext( wxGraphicsContext::CreateFromNative( m_overlayContext ) );
155 dc->SetClippingRegion( m_x , m_y , m_width , m_height ) ;
156 }
157 }
158
159 void wxOverlayImpl::EndDrawing( wxDC* dc)
160 {
161 wxDCImpl *impl = dc->GetImpl();
162 wxGCDCImpl *win_impl = wxDynamicCast(impl,wxGCDCImpl);
163 if (win_impl)
164 win_impl->SetGraphicsContext(NULL);
165
166 CGContextFlush( m_overlayContext );
167 }
168
169 void wxOverlayImpl::Clear(wxDC* WXUNUSED(dc))
170 {
171 wxASSERT_MSG( IsOk() , _("You cannot Clear an overlay that is not inited") );
172 CGRect box = CGRectMake( m_x - 1, m_y - 1 , m_width + 2 , m_height + 2 );
173 CGContextClearRect( m_overlayContext, box );
174 }
175
176 void wxOverlayImpl::Reset()
177 {
178 if ( m_overlayContext )
179 {
180 m_overlayContext = NULL ;
181 }
182
183 // todo : don't dispose, only hide and reposition on next run
184 if (m_overlayWindow)
185 {
186 [m_overlayParentWindow removeChildWindow:m_overlayWindow];
187 [m_overlayWindow release];
188 m_overlayWindow = NULL ;
189 }
190 }
191
192 #endif // wxHAS_NATIVE_OVERLAY