/////////////////////////////////////////////////////////////////////////////
-// Name: dcclient.cpp
+// Name: src/palmos/dcclient.cpp
// Purpose: wxClientDC class
-// Author: William Osborne
+// Author: William Osborne - minimal working wxPalmOS port
// Modified by:
// Created: 10/13/04
-// RCS-ID: $Id:
+// RCS-ID: $Id$
// Copyright: (c) William Osborne
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// headers
// ----------------------------------------------------------------------------
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
- #pragma implementation "dcclient.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#pragma hdrstop
#endif
-#include "wx/string.h"
-#include "wx/log.h"
-#include "wx/window.h"
-
#include "wx/dcclient.h"
+#include "wx/palmos/dcclient.h"
+
+#ifndef WX_PRECOMP
+ #include "wx/string.h"
+ #include "wx/log.h"
+ #include "wx/window.h"
+#endif
// ----------------------------------------------------------------------------
// array/list types
struct WXDLLEXPORT wxPaintDCInfo
{
- wxPaintDCInfo(wxWindow *win, wxDC *dc)
+ wxPaintDCInfo(wxWindow *win, wxPaintDCImpl *dc)
{
hwnd = win->GetHWND();
hdc = dc->GetHDC();
#include "wx/arrimpl.cpp"
-WX_DEFINE_OBJARRAY(wxArrayDCInfo);
+WX_DEFINE_OBJARRAY(wxArrayDCInfo)
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
-IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
-IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
-IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxClientDC)
-IMPLEMENT_CLASS(wxPaintDCEx, wxPaintDC)
-
// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------
#ifdef __WXDEBUG__
+ // a global variable which we check to verify that wxPaintDC are only
+ // created in response to WM_PAINT message - doing this from elsewhere is a
+ // common programming error among wxWidgets programmers and might lead to
+ // very subtle and difficult to debug refresh/repaint bugs.
int g_isPainting = 0;
#endif // __WXDEBUG__
// ===========================================================================
// ----------------------------------------------------------------------------
-// wxWindowDC
+// wxWindowDCImpl
// ----------------------------------------------------------------------------
-wxWindowDC::wxWindowDC()
+IMPLEMENT_ABSTRACT_CLASS(wxWindowDCImpl, wxPalmDCImpl)
+
+wxWindowDCImpl::wxWindowDCImpl( wxDC *owner ) :
+ wxPalmDCImpl( owner )
{
}
-wxWindowDC::wxWindowDC(wxWindow *canvas)
+wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window ) :
+ wxPalmDCImpl( owner )
{
+ wxCHECK_RET( window, _T("invalid window in wxWindowDCImpl") );
}
-void wxWindowDC::InitDC()
+void wxWindowDCImpl::InitDC()
{
+
+ // since we are a window dc we need to grab the palette from the window
+#if wxUSE_PALETTE
+ InitializePalette();
+#endif
}
-void wxWindowDC::DoGetSize(int *width, int *height) const
+void wxWindowDCImpl::DoGetSize(int *width, int *height) const
{
+ wxCHECK_RET( m_window, _T("wxWindowDCImpl without a window?") );
+
+ m_window->GetSize(width, height);
}
// ----------------------------------------------------------------------------
-// wxClientDC
+// wxClientDCImpl
// ----------------------------------------------------------------------------
-wxClientDC::wxClientDC()
+IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
+
+wxClientDCImpl::wxClientDCImpl( wxDC *owner ) :
+ wxWindowDCImpl( owner )
{
}
-wxClientDC::wxClientDC(wxWindow *canvas)
+wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
+ wxWindowDCImpl( owner )
{
}
-void wxClientDC::InitDC()
+void wxClientDCImpl::InitDC()
{
+ wxWindowDCImpl::InitDC();
+
+ // in wxUniv build we must manually do some DC adjustments usually
+ // performed by Windows for us
+ //
+ // we also need to take the menu/toolbar manually into account under
+ // Windows CE because they're just another control there, not anything
+ // special as usually under Windows
+#if defined(__WXUNIVERSAL__) || defined(__WXWINCE__)
+ wxPoint ptOrigin = m_window->GetClientAreaOrigin();
+ if ( ptOrigin.x || ptOrigin.y )
+ {
+ // no need to shift DC origin if shift is null
+ SetDeviceOrigin(ptOrigin.x, ptOrigin.y);
+ }
+
+ // clip the DC to avoid overwriting the non client area
+ SetClippingRegion(wxPoint(0,0), m_window->GetClientSize());
+#endif // __WXUNIVERSAL__ || __WXWINCE__
}
-wxClientDC::~wxClientDC()
+wxClientDCImpl::~wxClientDCImpl()
{
}
-void wxClientDC::DoGetSize(int *width, int *height) const
+void wxClientDCImpl::DoGetSize(int *width, int *height) const
{
+ wxCHECK_RET( m_window, _T("wxClientDCImpl without a window?") );
+
+ m_window->GetClientSize(width, height);
}
// ----------------------------------------------------------------------------
-// wxPaintDC
+// wxPaintDCImpl
// ----------------------------------------------------------------------------
-wxArrayDCInfo wxPaintDC::ms_cache;
-
-wxPaintDC::wxPaintDC()
+// VZ: initial implementation (by JACS) only remembered the last wxPaintDC
+// created and tried to reuse it - this was supposed to take care of a
+// situation when a derived class OnPaint() calls base class OnPaint()
+// because in this case ::BeginPaint() shouldn't be called second time.
+//
+// I'm not sure how useful this is, however we must remember the HWND
+// associated with the last HDC as well - otherwise we may (and will!) try
+// to reuse the HDC for another HWND which is a nice recipe for disaster.
+//
+// So we store a list of windows for which we already have the DC and not
+// just one single hDC. This seems to work, but I'm really not sure about
+// the usefullness of the whole idea - IMHO it's much better to not call
+// base class OnPaint() at all, or, if we really want to allow it, add a
+// "wxPaintDC *" parameter to wxPaintEvent which should be used if it's
+// !NULL instead of creating a new DC.
+
+IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxClientDCImpl)
+
+wxArrayDCInfo wxPaintDCImpl::ms_cache;
+
+wxPaintDCImpl::wxPaintDCImpl( wxDC *owner ) :
+ wxClientDCImpl( owner )
{
}
-wxPaintDC::wxPaintDC(wxWindow *canvas)
+wxPaintDCImpl::wxPaintDCImpl( wxDC *owner, wxWindow *window ) :
+ wxClientDCImpl( owner )
{
-}
+ wxCHECK_RET( window, wxT("NULL canvas in wxPaintDCImpl ctor") );
-wxPaintDC::~wxPaintDC()
-{
-}
+#ifdef __WXDEBUG__
+ if ( g_isPainting <= 0 )
+ {
+ wxFAIL_MSG( wxT("wxPaintDCImpl may be created only in EVT_PAINT handler!") );
-wxPaintDCInfo *wxPaintDC::FindInCache(size_t *index) const
-{
- return NULL;
+ return;
+ }
+#endif // __WXDEBUG__
+
+ m_window = window;
+
+ // do we have a DC for this window in the cache?
+ wxPaintDCInfo *info = FindInCache();
+ if ( info )
+ {
+ m_hDC = info->hdc;
+ info->count++;
+ }
+ else // not in cache, create a new one
+ {
+ //m_hDC = (WXHDC)::BeginPaint(GetHwndOf(m_window), &g_paintStruct);
+ if (m_hDC)
+ ms_cache.Add(new wxPaintDCInfo(m_window, this));
+ }
+
+ // Note: at this point m_hDC can be NULL under MicroWindows, when dragging.
+ if (!GetHDC())
+ return;
+
+ // (re)set the DC parameters.
+ InitDC();
+
+ // the HDC can have a clipping box (which we didn't set), make sure our
+ // DoGetClippingBox() checks for it
+ m_clipping = true;
}
-WXHDC wxPaintDC::FindDCInCache(wxWindow* win)
+wxPaintDCImpl::~wxPaintDCImpl()
{
- return 0;
+ if ( m_hDC )
+ {
+ SelectOldObjects(m_hDC);
+
+ size_t index;
+ wxPaintDCInfo *info = FindInCache(&index);
+
+ wxCHECK_RET( info, wxT("existing DC should have a cache entry") );
+
+ if ( --info->count == 0 )
+ {
+ //::EndPaint(GetHwndOf(m_window), &g_paintStruct);
+
+ ms_cache.RemoveAt(index);
+
+ // Reduce the number of bogus reports of non-freed memory
+ // at app exit
+ if (ms_cache.IsEmpty())
+ ms_cache.Clear();
+ }
+ //else: cached DC entry is still in use
+
+ // prevent the base class dtor from ReleaseDC()ing it again
+ m_hDC = 0;
+ }
}
-/*
- * wxPaintDCEx
- */
-
-wxPaintDCEx::wxPaintDCEx(wxWindow *canvas, WXHDC dc) : saveState(0)
+wxPaintDCInfo *wxPaintDCImpl::FindInCache(size_t *index) const
{
+ wxPaintDCInfo *info = NULL;
+ size_t nCache = ms_cache.GetCount();
+ for ( size_t n = 0; n < nCache; n++ )
+ {
+ wxPaintDCInfo *info1 = &ms_cache[n];
+ if ( info1->hwnd == m_window->GetHWND() )
+ {
+ info = info1;
+ if ( index )
+ *index = n;
+ break;
+ }
+ }
+
+ return info;
}
-wxPaintDCEx::~wxPaintDCEx()
+// find the entry for this DC in the cache (keyed by the window)
+WXHDC wxPaintDCImpl::FindDCInCache(wxWindow* win)
{
+ size_t nCache = ms_cache.GetCount();
+ for ( size_t n = 0; n < nCache; n++ )
+ {
+ wxPaintDCInfo *info = &ms_cache[n];
+ if ( info->hwnd == win->GetHWND() )
+ {
+ return info->hdc;
+ }
+ }
+ return 0;
}
-
projects / wxWidgets.git / blobdiff