projects / wxWidgets.git / blame
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|---|---|---|
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1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: dcmemory.cpp | |
| 3 | // Purpose: wxMemoryDC class | |
| 4 | // Author: Julian Smart | |
| 5 | // Modified by: | |
| 6 | // Created: 01/02/97 | |
| 7 | // RCS-ID: $Id$ | |
| 8 | // Copyright: (c) Julian Smart and Markus Holzem | |
| 9 | // Licence: wxWindows licence | |
| 10 | ///////////////////////////////////////////////////////////////////////////// | |
| 11 | ||
| 12 | #ifdef __GNUG__ | |
| 13 | #pragma implementation | |
| 14 | #pragma implementation "dcmemory.h" | |
| 15 | #endif | |
| 16 | ||
| 17 | // For compilers that support precompilation, includes "wx.h". | |
| 18 | #include "wx/wxprec.h" | |
| 19 | ||
| 20 | #ifdef __BORLANDC__ | |
| 21 | #pragma hdrstop | |
| 22 | #endif | |
| 23 | ||
| 24 | #ifndef WX_PRECOMP | |
| 25 | #endif | |
| 26 | ||
| 27 | #include "wx/dcmemory.h" | |
| 28 | ||
| 29 | #include <windows.h> | |
| 30 | ||
| 31 | #if !USE_SHARED_LIBRARY | |
| 32 | IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC) | |
| 33 | #endif | |
| 34 | ||
| 35 | /* | |
| 36 | * Memory DC | |
| 37 | * | |
| 38 | */ | |
| 39 | ||
| 40 | wxMemoryDC::wxMemoryDC(void) | |
| 41 | { | |
| 42 | m_hDC = (WXHDC) ::CreateCompatibleDC(NULL); | |
| 43 | m_ok = (m_hDC != 0); | |
| 1c089c47 | 44 | m_bOwnsDC = TRUE; |
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45 | |
| 46 | SetBrush(*wxWHITE_BRUSH); | |
| 47 | SetPen(*wxBLACK_PEN); | |
| 48 | } | |
| 49 | ||
| 50 | wxMemoryDC::wxMemoryDC(wxDC *old_dc) | |
| 51 | { | |
| 52 | old_dc->BeginDrawing(); | |
| 53 | ||
| 54 | m_hDC = (WXHDC) ::CreateCompatibleDC((HDC) old_dc->GetHDC()); | |
| 55 | m_ok = (m_hDC != 0); | |
| 56 | ||
| 57 | old_dc->EndDrawing(); | |
| 58 | ||
| 59 | SetBrush(*wxWHITE_BRUSH); | |
| 60 | SetPen(*wxBLACK_PEN); | |
| 61 | } | |
| 62 | ||
| 63 | wxMemoryDC::~wxMemoryDC(void) | |
| 64 | { | |
| 65 | } | |
| 66 | ||
| 67 | void wxMemoryDC::SelectObject(const wxBitmap& bitmap) | |
| 68 | { | |
| 69 | // Select old bitmap out of the device context | |
| 70 | if (m_oldBitmap) | |
| 71 | { | |
| 72 | ::SelectObject((HDC) m_hDC, (HBITMAP) m_oldBitmap); | |
| 73 | if (m_selectedBitmap.Ok()) | |
| 74 | { | |
| 75 | m_selectedBitmap.SetSelectedInto(NULL); | |
| 76 | m_selectedBitmap = wxNullBitmap; | |
| 77 | } | |
| 78 | } | |
| 79 | ||
| 80 | // Do own check for whether the bitmap is already selected into | |
| 81 | // a device context | |
| 82 | if (bitmap.GetSelectedInto() && (bitmap.GetSelectedInto() != this)) | |
| 83 | { | |
| 84 | wxFatalError("Error in wxMemoryDC::SelectObject\nBitmap is selected in another wxMemoryDC.\nDelete the first wxMemoryDC or use SelectObject(NULL)"); | |
| 85 | return; | |
| 86 | } | |
| 87 | ||
| 88 | m_selectedBitmap = bitmap; | |
| 89 | ||
| 90 | if (!m_selectedBitmap.Ok()) | |
| 91 | return; | |
| 92 | ||
| 93 | m_selectedBitmap.SetSelectedInto(this); | |
| b2aef89b | 94 | #if WXDEBUG > 1 |
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95 | wxDebugMsg("wxMemoryDC::SelectObject: Selecting HBITMAP %X\n", m_selectedBitmap.GetHBITMAP()); |
| 96 | #endif | |
| c4e7c2aa | 97 | HBITMAP bm = (HBITMAP) ::SelectObject((HDC) m_hDC, (HBITMAP) m_selectedBitmap.GetHBITMAP()); |
| 2bda0e17 KB |
98 | |
| 99 | if (bm == ERROR) | |
| 100 | { | |
| 101 | wxFatalError("Error in wxMemoryDC::SelectObject\nBitmap may not be loaded, or may be selected in another wxMemoryDC.\nDelete the first wxMemoryDC to deselect bitmap."); | |
| 102 | } | |
| 103 | else if (!m_oldBitmap) | |
| 104 | m_oldBitmap = (WXHBITMAP) bm; | |
| 105 | } | |
| 106 | ||
| 107 | void wxMemoryDC::GetSize(int *width, int *height) const | |
| 108 | { | |
| 109 | if (!m_selectedBitmap.Ok()) | |
| 110 | { | |
| 111 | *width = 0; *height = 0; | |
| 112 | return; | |
| 113 | } | |
| 114 | *width = m_selectedBitmap.GetWidth(); | |
| 115 | *height = m_selectedBitmap.GetHeight(); | |
| 116 | } | |
| 117 |