Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

wxDC::SetClippingRegion() in wxMSW works like in wxGTK, i.e. combines the given region with the old one (also documented this behaviour as the correct one)

Browse Source 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13967 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2002-02-02 00:40:45 +00:00
parent 8cb490124b
commit 5230934a95
4 changed files with 67 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

77
src/msw/dc.cpp
View File

@@ -279,7 +279,7 @@ void wxDC::UpdateClipBox()
#endif
RECT rect;
GetClipBox(GetHdc(), &rect);
::GetClipBox(GetHdc(), &rect);
m_clipX1 = (wxCoord) XDEV2LOG(rect.left);
m_clipY1 = (wxCoord) YDEV2LOG(rect.top);
@@ -287,14 +287,50 @@ void wxDC::UpdateClipBox()
m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
}
void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
// common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
void wxDC::SetClippingHrgn(WXHRGN hrgn)
{
wxCHECK_RET( hrgn, wxT("invalid clipping region") );
#ifdef __WXMICROWIN__
if (!GetHDC()) return;
#endif
if (!GetHdc()) return;
#endif // __WXMICROWIN__
// note that we combine the new clipping region with the existing one: this
// is compatible with what the other ports do and is the documented
// behaviour now (starting with 2.3.3)
#ifdef __WIN16__
RECT rectClip;
if ( !::GetClipBox(GetHdc(), &rectClip) )
return;
HRGN hrgnDest = ::CreateRectRgn(0, 0, 0, 0);
HRGN hrgnClipOld = ::CreateRectRgn(rectClip.left, rectClip.top,
rectClip.right, rectClip.bottom);
if ( ::CombineRgn(hrgnDest, hrgnClipOld, (HRGN)hrgn, RGN_AND) != ERROR )
{
::SelectClipRgn(GetHdc(), hrgnDest);
}
::DeleteObject(hrgnClipOld);
::DeleteObject(hrgnDest);
#else // Win32
if ( ::ExtSelectClipRgn(GetHdc(), (HRGN)hrgn, RGN_AND) == ERROR )
{
wxLogLastError(_T("ExtSelectClipRgn"));
return;
}
#endif // Win16/32
m_clipping = TRUE;
UpdateClipBox();
}
void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
{
// the region coords are always the device ones, so do the translation
// manually
//
@@ -309,33 +345,15 @@ void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
}
else
{
if ( ::SelectClipRgn(GetHdc(), hrgn) == ERROR )
{
wxLogLastError(_T("SelectClipRgn"));
}
DeleteObject(hrgn);
SetClippingHrgn((WXHRGN)hrgn);
UpdateClipBox();
::DeleteObject(hrgn);
}
}
void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
{
#ifdef __WXMICROWIN__
if (!GetHDC()) return;
#endif
wxCHECK_RET( GetHrgnOf(region), wxT("invalid clipping region") );
m_clipping = TRUE;
#ifdef __WIN16__
SelectClipRgn(GetHdc(), GetHrgnOf(region));
#else // Win32
ExtSelectClipRgn(GetHdc(), GetHrgnOf(region), RGN_AND);
#endif // Win16/32
UpdateClipBox();
SetClippingHrgn(region.GetHRGN());
}
void wxDC::DestroyClippingRegion()
@@ -347,11 +365,12 @@ void wxDC::DestroyClippingRegion()
if (m_clipping && m_hDC)
{
// TODO: this should restore the previous clipping region,
// so that OnPaint processing works correctly, and the update clipping region
// doesn't get destroyed after the first DestroyClippingRegion.
// so that OnPaint processing works correctly, and the update
// clipping region doesn't get destroyed after the first
// DestroyClippingRegion.
HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
SelectClipRgn(GetHdc(), rgn);
DeleteObject(rgn);
::SelectClipRgn(GetHdc(), rgn);
::DeleteObject(rgn);
}
m_clipping = FALSE;