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[wxWidgets.git] / src / dfb / overlay.cpp
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1/////////////////////////////////////////////////////////////////////////////
2// Name: src/dfb/overlay.cpp
3// Purpose: wxOverlay implementation for wxDFB
4// Author: Vaclav Slavik
5// Created: 2006-10-20
6// RCS-ID: $Id$
7// Copyright: (c) wxWidgets team
8// Licence: wxWindows licence
9/////////////////////////////////////////////////////////////////////////////
10
11// ============================================================================
12// declarations
13// ============================================================================
14
15// ----------------------------------------------------------------------------
16// headers
17// ----------------------------------------------------------------------------
18
19// For compilers that support precompilation, includes "wx.h".
20#include "wx/wxprec.h"
21
22#ifdef __BORLANDC__
23 #pragma hdrstop
24#endif
25
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26#ifndef WX_PRECOMP
27 #include "wx/window.h"
28 #include "wx/dcclient.h"
29#endif
30
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31#include "wx/private/overlay.h"
32#include "wx/dfb/private.h"
33
34// ============================================================================
35// implementation
36// ============================================================================
37
38// ----------------------------------------------------------------------------
39// wxOverlay
40// ----------------------------------------------------------------------------
41
42wxOverlayImpl::wxOverlayImpl()
43{
44 m_window = NULL;
45 m_isEmpty = true;
46}
47
48wxOverlayImpl::~wxOverlayImpl()
49{
50 Reset();
51}
52
53bool wxOverlayImpl::IsOk()
54{
55 return m_window != NULL;
56}
57
58void wxOverlayImpl::Init(wxWindowDC *dc, int x, int y, int width, int height)
59{
60 wxASSERT_MSG( !IsOk() , _("You cannot Init an overlay twice") );
61
62 m_window = dc->GetWindow();
63
64 m_rect = wxRect(x, y, width, height);
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65 if ( wxDynamicCast(dc, wxClientDC) )
66 m_rect.Offset(m_window->GetClientAreaOrigin());
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67
68 // FIXME: create surface with transparency or key color (?)
69 m_surface =
70 dc->GetDirectFBSurface()->CreateCompatible
71 (
72 m_rect.GetSize(),
73 wxIDirectFBSurface::CreateCompatible_NoBackBuffer
74 );
75
76 m_window->AddOverlay(this);
77}
78
79void wxOverlayImpl::BeginDrawing(wxWindowDC *dc)
80{
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81 wxPoint origin(m_rect.GetPosition());
82 if ( wxDynamicCast(dc, wxClientDC) )
83 origin -= m_window->GetClientAreaOrigin();
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84
85 // drawing on overlay "hijacks" existing wxWindowDC rather then using
86 // another DC, so we have to change the DC to draw on the overlay's surface.
87 // Setting m_shouldFlip is done to avoid flipping and drawing of overlays
88 // in ~wxWindowDC (we do it EndDrawing).
c16db850 89 dc->DFBInit(m_surface);
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90 dc->SetDeviceOrigin(-origin.x, -origin.y);
91 dc->m_shouldFlip = false;
92
93 m_isEmpty = false;
94}
95
96void wxOverlayImpl::EndDrawing(wxWindowDC *dc)
97{
98 m_window->RefreshWindowRect(m_rect);
99}
100
101void wxOverlayImpl::Clear(wxWindowDC *dc)
102{
103 wxASSERT_MSG( IsOk(),
104 _T("You cannot Clear an overlay that is not initialized") );
105
106 m_isEmpty = true;
107}
108
109void wxOverlayImpl::Reset()
110{
111 if ( m_window )
112 {
113 m_window->RemoveOverlay(this);
114 m_window = NULL;
115 m_surface.Reset();
116 }
117}