bbcf2821a1
wxCustomBackgroundWindow is a new class allowing to set a custom bitmap for the background of any window. The relevant code was mostly moved from wxPanel to which it was added only recently (before 2.9.2) making it unnecessary to preserve compatibility. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69378 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/generic/custombgwin.h
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// Purpose: Generic implementation of wxCustomBackgroundWindow.
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// Author: Vadim Zeitlin
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// Created: 2011-10-10
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// RCS-ID: $Id: wxhead.h,v 1.12 2010-04-22 12:44:51 zeitlin Exp $
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// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_GENERIC_CUSTOMBGWIN_H_
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#define _WX_GENERIC_CUSTOMBGWIN_H_
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#include "wx/bitmap.h"
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// A helper to avoid template bloat: this class contains all type-independent
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// code of wxCustomBackgroundWindow<> below.
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class wxCustomBackgroundWindowGenericBase : public wxCustomBackgroundWindowBase
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{
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public:
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wxCustomBackgroundWindowGenericBase() { }
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protected:
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void DoEraseBackground(wxEraseEvent& event, wxWindow* win)
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{
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wxDC& dc = *event.GetDC();
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const wxSize clientSize = win->GetClientSize();
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const wxSize bitmapSize = m_bitmapBg.GetSize();
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for ( int x = 0; x < clientSize.x; x += bitmapSize.x )
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{
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for ( int y = 0; y < clientSize.y; y += bitmapSize.y )
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{
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dc.DrawBitmap(m_bitmapBg, x, y);
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}
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}
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}
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// The bitmap used for painting the background if valid.
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wxBitmap m_bitmapBg;
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wxDECLARE_NO_COPY_CLASS(wxCustomBackgroundWindowGenericBase);
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};
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// ----------------------------------------------------------------------------
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// wxCustomBackgroundWindow
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// ----------------------------------------------------------------------------
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template <class W>
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class wxCustomBackgroundWindow : public W,
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public wxCustomBackgroundWindowGenericBase
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{
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public:
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typedef W BaseWindowClass;
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wxCustomBackgroundWindow() { }
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protected:
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virtual void DoSetBackgroundBitmap(const wxBitmap& bmp)
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{
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m_bitmapBg = bmp;
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if ( m_bitmapBg.IsOk() )
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{
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BaseWindowClass::Connect
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(
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wxEVT_ERASE_BACKGROUND,
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wxEraseEventHandler(wxCustomBackgroundWindow::OnEraseBackground)
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);
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}
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else
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{
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BaseWindowClass::Disconnect
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(
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wxEVT_ERASE_BACKGROUND,
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wxEraseEventHandler(wxCustomBackgroundWindow::OnEraseBackground)
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);
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}
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}
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private:
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// Event handler for erasing the background which is only used when we have
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// a valid background bitmap.
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void OnEraseBackground(wxEraseEvent& event)
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{
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DoEraseBackground(event, this);
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}
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wxDECLARE_NO_COPY_TEMPLATE_CLASS(wxCustomBackgroundWindow, W);
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};
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#endif // _WX_GENERIC_CUSTOMBGWIN_H_
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