3c4f71cc3d
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52634 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
68 lines
2.3 KiB
Objective-C
68 lines
2.3 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: dcscreen.h
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// Purpose: interface of wxScreenDC
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// Author: wxWidgets team
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// RCS-ID: $Id$
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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/**
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@class wxScreenDC
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@wxheader{dcscreen.h}
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A wxScreenDC can be used to paint on the screen.
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This should normally be constructed as a temporary stack object; don't store
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a wxScreenDC object.
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@library{wxcore}
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@category{dc}
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@see wxDC, wxMemoryDC, wxPaintDC, wxClientDC, wxWindowDC
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*/
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class wxScreenDC : public wxDC
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{
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public:
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/**
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Constructor.
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*/
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wxScreenDC();
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/**
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Use this in conjunction with StartDrawingOnTop().
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This function destroys the temporary window created to implement on-top drawing
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(X only).
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*/
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bool EndDrawingOnTop();
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//@{
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/**
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Use this in conjunction with EndDrawingOnTop() to
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ensure that drawing to the screen occurs on top of existing windows. Without
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this,
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some window systems (such as X) only allow drawing to take place underneath
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other windows.
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By using the first form of this function, an application is specifying that
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the area that will be drawn on coincides with the given window.
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By using the second form, an application can specify an area of the screen
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which is to be drawn on. If @NULL is passed, the whole screen is available.
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It is recommended that an area of the screen is specified because with large
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regions,
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flickering effects are noticeable when destroying the temporary transparent
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window used
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to implement this feature.
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You might use this pair of functions when implementing a drag feature, for
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example
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as in the wxSplitterWindow implementation.
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@remarks This function is probably obsolete since the X implementations
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allow drawing directly on the screen now. However, the
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fact that this function allows the screen to be
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refreshed afterwards, may be useful to some
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applications.
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*/
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bool StartDrawingOnTop(wxWindow* window);
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bool StartDrawingOnTop(wxRect* rect = NULL);
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//@}
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};
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