7b46ecac64
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@650 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
129 lines
2.9 KiB
C++
129 lines
2.9 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: dcmemory.cpp
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// Purpose: wxMemoryDC class
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// Author: Julian Smart
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// Modified by:
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// Created: 01/02/97
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// RCS-ID: $Id$
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// Copyright: (c) Julian Smart and Markus Holzem
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma implementation
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#pragma implementation "dcmemory.h"
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#endif
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#include "wx/dcmemory.h"
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#include <windows.h>
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#if !USE_SHARED_LIBRARY
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IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
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#endif
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/*
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* Memory DC
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*
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*/
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wxMemoryDC::wxMemoryDC(void)
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{
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m_hDC = (WXHDC) ::CreateCompatibleDC(NULL);
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m_ok = (m_hDC != 0);
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m_bOwnsDC = TRUE;
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SetBrush(*wxWHITE_BRUSH);
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SetPen(*wxBLACK_PEN);
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}
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wxMemoryDC::wxMemoryDC(wxDC *old_dc)
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{
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old_dc->BeginDrawing();
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m_hDC = (WXHDC) ::CreateCompatibleDC((HDC) old_dc->GetHDC());
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m_ok = (m_hDC != 0);
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old_dc->EndDrawing();
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SetBrush(*wxWHITE_BRUSH);
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SetPen(*wxBLACK_PEN);
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}
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wxMemoryDC::~wxMemoryDC(void)
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{
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}
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void wxMemoryDC::SelectObject(const wxBitmap& bitmap)
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{
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// Select old bitmap out of the device context
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if (m_oldBitmap)
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{
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::SelectObject((HDC) m_hDC, (HBITMAP) m_oldBitmap);
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if (m_selectedBitmap.Ok())
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{
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m_selectedBitmap.SetSelectedInto(NULL);
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m_selectedBitmap = wxNullBitmap;
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}
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}
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// Do own check for whether the bitmap is already selected into
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// a device context
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if (bitmap.GetSelectedInto() && (bitmap.GetSelectedInto() != this))
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{
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wxFatalError("Error in wxMemoryDC::SelectObject\nBitmap is selected in another wxMemoryDC.\nDelete the first wxMemoryDC or use SelectObject(NULL)");
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return;
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}
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// Check if the bitmap has the correct depth for this device context
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if (bitmap.Ok() && (bitmap.GetDepth() != GetDepth()))
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{
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// Make a new bitmap that has the correct depth.
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wxBitmap newBitmap = bitmap.GetBitmapForDC(* this);
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m_selectedBitmap = newBitmap ;
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}
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else
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{
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m_selectedBitmap = bitmap;
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}
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if (!m_selectedBitmap.Ok())
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return;
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m_selectedBitmap.SetSelectedInto(this);
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#if WXDEBUG > 1
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wxDebugMsg("wxMemoryDC::SelectObject: Selecting HBITMAP %X\n", m_selectedBitmap.GetHBITMAP());
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#endif
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HBITMAP bm = (HBITMAP) ::SelectObject((HDC) m_hDC, (HBITMAP) m_selectedBitmap.GetHBITMAP());
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if (bm == ERROR)
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{
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wxFatalError("Error in wxMemoryDC::SelectObject\nBitmap may not be loaded, or may be selected in another wxMemoryDC.\nDelete the first wxMemoryDC to deselect bitmap.");
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}
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else if (!m_oldBitmap)
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m_oldBitmap = (WXHBITMAP) bm;
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}
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void wxMemoryDC::GetSize(int *width, int *height) const
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{
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if (!m_selectedBitmap.Ok())
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{
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*width = 0; *height = 0;
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return;
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}
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*width = m_selectedBitmap.GetWidth();
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*height = m_selectedBitmap.GetHeight();
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}
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