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59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/msw/private/customdraw.h
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// Purpose: Helper for implementing custom drawing support in wxMSW
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// Author: Vadim Zeitlin
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// Created: 2016-04-16
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// Copyright: (c) 2016 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_MSW_CUSTOMDRAW_H_
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#define _WX_MSW_CUSTOMDRAW_H_
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#include "wx/itemattr.h"
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#include "wx/msw/wrapcctl.h"
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namespace wxMSWImpl
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{
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// ----------------------------------------------------------------------------
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// CustomDraw: inherit from this class and forward NM_CUSTOMDRAW to it
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// ----------------------------------------------------------------------------
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class CustomDraw
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{
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public:
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// Trivial default ctor needed for non-copyable class.
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CustomDraw()
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{
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}
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// Virtual dtor for the base class.
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virtual ~CustomDraw()
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{
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}
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// Implementation of NM_CUSTOMDRAW handler, returns one of CDRF_XXX
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// constants, possibly CDRF_DODEFAULT if custom drawing is not necessary.
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LPARAM HandleCustomDraw(LPARAM lParam);
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private:
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// Return true if we need custom drawing at all.
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virtual bool HasCustomDrawnItems() const = 0;
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// Return the attribute to use for the given item, can return NULL if this
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// item doesn't need to be custom-drawn.
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virtual const wxItemAttr* GetItemAttr(DWORD_PTR dwItemSpec) const = 0;
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// Set the colours and font for the specified HDC, return CDRF_NEWFONT if
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// the font was changed.
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LPARAM HandleItemPrepaint(const wxItemAttr& attr, HDC hdc);
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wxDECLARE_NO_COPY_CLASS(CustomDraw);
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};
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} // namespace wxMSWImpl
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#endif // _WX_MSW_CUSTOMDRAW_H_
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