/////////////////////////////////////////////////////////////////////////////
-// Name: dcmemory.cpp
+// Name: src/msw/dcmemory.cpp
// Purpose: wxMemoryDC class
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart and Markus Holzem
+// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
- #pragma implementation "dcmemory.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#pragma hdrstop
#endif
+#include "wx/dcmemory.h"
+
#ifndef WX_PRECOMP
#include "wx/utils.h"
#include "wx/log.h"
#include "wx/msw/private.h"
-#include "wx/dcmemory.h"
-
// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------
- IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
+IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
// ============================================================================
// implementation
wxMemoryDC::wxMemoryDC()
{
- m_hDC = (WXHDC) ::CreateCompatibleDC((HDC) NULL);
- m_ok = (m_hDC != 0);
- m_bOwnsDC = TRUE;
-
- SetBrush(*wxWHITE_BRUSH);
- SetPen(*wxBLACK_PEN);
+ CreateCompatible(NULL);
- // the background mode is only used for text background and is set in
- // DrawText() to OPAQUE as required, otherwise always TRANSPARENT
- ::SetBkMode( GetHdc(), TRANSPARENT );
+ Init();
}
-wxMemoryDC::wxMemoryDC(wxDC *old_dc)
+wxMemoryDC::wxMemoryDC(wxDC *dc)
{
- old_dc->BeginDrawing();
+ wxCHECK_RET( dc, _T("NULL dc in wxMemoryDC ctor") );
- m_hDC = (WXHDC) ::CreateCompatibleDC(GetHdcOf(*old_dc));
- m_ok = (m_hDC != 0);
+ CreateCompatible(dc);
- old_dc->EndDrawing();
+ Init();
+}
- SetBrush(*wxWHITE_BRUSH);
- SetPen(*wxBLACK_PEN);
+void wxMemoryDC::Init()
+{
+ if ( m_ok )
+ {
+ SetBrush(*wxWHITE_BRUSH);
+ SetPen(*wxBLACK_PEN);
- // the background mode is only used for text background and is set in
- // DrawText() to OPAQUE as required, otherwise always TRANSPARENT
- ::SetBkMode( GetHdc(), TRANSPARENT );
+ // the background mode is only used for text background and is set in
+ // DrawText() to OPAQUE as required, otherwise always TRANSPARENT
+ ::SetBkMode( GetHdc(), TRANSPARENT );
+ }
}
-wxMemoryDC::~wxMemoryDC()
+bool wxMemoryDC::CreateCompatible(wxDC *dc)
{
+ m_hDC = (WXHDC)::CreateCompatibleDC(dc ? GetHdcOf(*dc) : NULL);
+
+ // as we created the DC, we must delete it in the dtor
+ m_bOwnsDC = true;
+
+ m_ok = m_hDC != 0;
+
+ return m_ok;
}
void wxMemoryDC::SelectObject(const wxBitmap& bitmap)
::SelectObject(GetHdc(), (HBITMAP) m_oldBitmap);
if ( m_selectedBitmap.Ok() )
{
+#ifdef __WXDEBUG__
m_selectedBitmap.SetSelectedInto(NULL);
+#endif
m_selectedBitmap = wxNullBitmap;
}
}
// check for whether the bitmap is already selected into a device context
- wxCHECK_RET( !bitmap.GetSelectedInto() ||
- (bitmap.GetSelectedInto() == this),
- wxT("Bitmap is selected in another wxMemoryDC, delete the "
- "first wxMemoryDC or use SelectObject(NULL)") );
+ wxASSERT_MSG( !bitmap.GetSelectedInto() ||
+ (bitmap.GetSelectedInto() == this),
+ wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );
m_selectedBitmap = bitmap;
WXHBITMAP hBmp = m_selectedBitmap.GetHBITMAP();
if ( !hBmp )
return;
+#ifdef __WXDEBUG__
m_selectedBitmap.SetSelectedInto(this);
+#endif
hBmp = (WXHBITMAP)::SelectObject(GetHdc(), (HBITMAP)hBmp);
if ( !hBmp )
{
- wxLogLastError("SelectObject(memDC, bitmap)");
+ wxLogLastError(wxT("SelectObject(memDC, bitmap)"));
wxFAIL_MSG(wxT("Couldn't select a bitmap into wxMemoryDC"));
}
}
}
+// the rest of this file deals with drawing rectangles workaround, disabled by
+// default
+
+#define wxUSE_MEMORY_DC_DRAW_RECTANGLE 0
+
+#if wxUSE_MEMORY_DC_DRAW_RECTANGLE
+
+// For some reason, drawing a rectangle on a memory DC has problems.
+// Use this substitute if we can.
+static void wxDrawRectangle(wxDC& dc, wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+{
+ wxBrush brush(dc.GetBrush());
+ wxPen pen(dc.GetPen());
+ if (brush.Ok() && brush.GetStyle() != wxTRANSPARENT)
+ {
+ HBRUSH hBrush = (HBRUSH) brush.GetResourceHandle() ;
+ if (hBrush)
+ {
+ RECT rect;
+ rect.left = x; rect.top = y;
+ rect.right = x + width - 1;
+ rect.bottom = y + height - 1;
+ ::FillRect((HDC) dc.GetHDC(), &rect, hBrush);
+ }
+ }
+ width --; height --;
+ if (pen.Ok() && pen.GetStyle() != wxTRANSPARENT)
+ {
+ dc.DrawLine(x, y, x + width, y);
+ dc.DrawLine(x, y, x, y + height);
+ dc.DrawLine(x, y+height, x+width, y + height);
+ dc.DrawLine(x+width, y+height, x+width, y);
+ }
+}
+
+#endif // wxUSE_MEMORY_DC_DRAW_RECTANGLE
+
+void wxMemoryDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+{
+ // Set this to 1 to work around an apparent video driver bug
+ // (visible with e.g. 70x70 rectangle on a memory DC; see Drawing sample)
+#if wxUSE_MEMORY_DC_DRAW_RECTANGLE
+ if (m_brush.Ok() && m_pen.Ok() &&
+ (m_brush.GetStyle() == wxSOLID || m_brush.GetStyle() == wxTRANSPARENT) &&
+ (m_pen.GetStyle() == wxSOLID || m_pen.GetStyle() == wxTRANSPARENT) &&
+ (GetLogicalFunction() == wxCOPY))
+ {
+ wxDrawRectangle(* this, x, y, width, height);
+ }
+ else
+#endif // wxUSE_MEMORY_DC_DRAW_RECTANGLE
+ {
+ wxDC::DoDrawRectangle(x, y, width, height);
+ }
+}
projects / wxWidgets.git / blobdiff