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

added HDCClipper() class which automatically unselects clipping region in its dtor

Browse Source 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33468 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2005-04-10 11:30:37 +00:00
parent c277569a74
commit a1372ae2fa
1 changed files with 22 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
include/wx/msw/private.h
View File

@@ -449,6 +449,28 @@ public:
operator HRGN() const { return (HRGN)GetObject(); } operator HRGN() const { return (HRGN)GetObject(); }
}; };
// class sets the specified clipping region during its life time
class HDCClipper
{
public:
HDCClipper(HDC hdc, HRGN hrgn)
: m_hdc(hdc)
{
if ( !::SelectClipRgn(hdc, hrgn) )
wxLogLastError(_T("SelectClipRgn"));
}
~HDCClipper()
{
::SelectClipRgn(m_hdc, NULL);
}
private:
HDC m_hdc;
DECLARE_NO_COPY_CLASS(HDCClipper)
};
// when working with global pointers (which is unfortunately still necessary // when working with global pointers (which is unfortunately still necessary
// sometimes, e.g. for clipboard) it is important to unlock them exactly as // sometimes, e.g. for clipboard) it is important to unlock them exactly as
// many times as we lock them which just asks for using a "smart lock" class // many times as we lock them which just asks for using a "smart lock" class