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98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/overlay.h
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// Purpose: wxOverlay class
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// Author: Stefan Csomor
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// Modified by:
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// Created: 2006-10-20
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// RCS-ID: $Id: overlay.h 53135 2008-04-12 02:31:04Z VZ $
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// Copyright: (c) wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_OVERLAY_H_
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#define _WX_OVERLAY_H_
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#include "wx/defs.h"
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#if defined(wxMAC_USE_CORE_GRAPHICS) && wxMAC_USE_CORE_GRAPHICS
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#define wxHAS_NATIVE_OVERLAY 1
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#elif defined(__WXDFB__)
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#define wxHAS_NATIVE_OVERLAY 1
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#else
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// don't define wxHAS_NATIVE_OVERLAY
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#endif
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// ----------------------------------------------------------------------------
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// creates an overlay over an existing window, allowing for manipulations like
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// rubberbanding etc. This API is not stable yet, not to be used outside wx
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// internal code
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_FWD_CORE wxOverlayImpl;
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class WXDLLIMPEXP_FWD_CORE wxWindowDC;
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class WXDLLEXPORT wxOverlay
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{
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public:
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wxOverlay();
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~wxOverlay();
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// clears the overlay without restoring the former state
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// to be done eg when the window content has been changed and repainted
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void Reset();
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// returns (port-specific) implementation of the overlay
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wxOverlayImpl *GetImpl() { return m_impl; }
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private:
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friend class WXDLLIMPEXP_FWD_CORE wxDCOverlay;
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// returns true if it has been setup
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bool IsOk();
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void Init(wxWindowDC* dc, int x , int y , int width , int height);
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void BeginDrawing(wxWindowDC* dc);
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void EndDrawing(wxWindowDC* dc);
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void Clear(wxWindowDC* dc);
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wxOverlayImpl* m_impl;
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bool m_inDrawing;
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DECLARE_NO_COPY_CLASS(wxOverlay)
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};
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class WXDLLEXPORT wxDCOverlay
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{
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public:
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// connects this overlay to the corresponding drawing dc, if the overlay is
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// not initialized yet this call will do so
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wxDCOverlay(wxOverlay &overlay, wxWindowDC *dc, int x , int y , int width , int height);
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// convenience wrapper that behaves the same using the entire area of the dc
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wxDCOverlay(wxOverlay &overlay, wxWindowDC *dc);
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// removes the connection between the overlay and the dc
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virtual ~wxDCOverlay();
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// clears the layer, restoring the state at the last init
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void Clear();
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private:
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void Init(wxWindowDC *dc, int x , int y , int width , int height);
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wxOverlay& m_overlay;
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wxWindowDC* m_dc;
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DECLARE_NO_COPY_CLASS(wxDCOverlay)
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};
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#endif // _WX_OVERLAY_H_
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