148 lines
3.5 KiB
C++
148 lines
3.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/msw/private/dc.h
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// Purpose: private wxMSW helpers for working with HDCs
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// Author: Vadim Zeitlin
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// Created: 2009-06-16 (extracted from src/msw/dc.cpp)
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// Copyright: (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _MSW_PRIVATE_DC_H_
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#define _MSW_PRIVATE_DC_H_
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#include "wx/msw/dc.h"
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#include "wx/msw/wrapwin.h"
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namespace wxMSWImpl
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{
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// various classes to change some DC property temporarily
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// text background and foreground colours
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class wxTextColoursChanger
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{
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public:
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wxTextColoursChanger(HDC hdc, const wxMSWDCImpl& dc)
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: m_hdc(hdc)
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{
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Change(dc.GetTextForeground(), dc.GetTextBackground());
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}
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wxTextColoursChanger(HDC hdc, const wxColour& colFg, const wxColour& colBg)
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: m_hdc(hdc)
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{
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Change(colFg, colBg);
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}
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wxTextColoursChanger(HDC hdc, COLORREF colFg, COLORREF colBg)
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: m_hdc(hdc)
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{
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Change(colFg, colBg);
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}
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~wxTextColoursChanger()
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{
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if ( m_oldColFg != CLR_INVALID )
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::SetTextColor(m_hdc, m_oldColFg);
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if ( m_oldColBg != CLR_INVALID )
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::SetBkColor(m_hdc, m_oldColBg);
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}
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protected:
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// this ctor doesn't change mode immediately, call Change() later to do it
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// only if needed
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wxTextColoursChanger(HDC hdc)
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: m_hdc(hdc)
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{
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m_oldColFg =
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m_oldColBg = CLR_INVALID;
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}
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void Change(const wxColour& colFg, const wxColour& colBg)
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{
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Change(colFg.IsOk() ? colFg.GetPixel() : CLR_INVALID,
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colBg.IsOk() ? colBg.GetPixel() : CLR_INVALID);
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}
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void Change(COLORREF colFg, COLORREF colBg)
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{
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if ( colFg != CLR_INVALID )
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{
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m_oldColFg = ::SetTextColor(m_hdc, colFg);
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if ( m_oldColFg == CLR_INVALID )
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{
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wxLogLastError(wxT("SetTextColor"));
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}
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}
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else
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{
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m_oldColFg = CLR_INVALID;
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}
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if ( colBg != CLR_INVALID )
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{
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m_oldColBg = ::SetBkColor(m_hdc, colBg);
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if ( m_oldColBg == CLR_INVALID )
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{
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wxLogLastError(wxT("SetBkColor"));
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}
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}
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else
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{
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m_oldColBg = CLR_INVALID;
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}
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}
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private:
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const HDC m_hdc;
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COLORREF m_oldColFg,
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m_oldColBg;
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wxDECLARE_NO_COPY_CLASS(wxTextColoursChanger);
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};
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// background mode
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class wxBkModeChanger
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{
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public:
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// set background mode to opaque if mode != wxBRUSHSTYLE_TRANSPARENT
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wxBkModeChanger(HDC hdc, int mode)
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: m_hdc(hdc)
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{
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Change(mode);
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}
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~wxBkModeChanger()
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{
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if ( m_oldMode )
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::SetBkMode(m_hdc, m_oldMode);
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}
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protected:
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// this ctor doesn't change mode immediately, call Change() later to do it
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// only if needed
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wxBkModeChanger(HDC hdc) : m_hdc(hdc) { m_oldMode = 0; }
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void Change(int mode)
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{
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m_oldMode = ::SetBkMode(m_hdc, mode == wxBRUSHSTYLE_TRANSPARENT
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? TRANSPARENT
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: OPAQUE);
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if ( !m_oldMode )
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{
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wxLogLastError(wxT("SetBkMode"));
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}
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}
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private:
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const HDC m_hdc;
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int m_oldMode;
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wxDECLARE_NO_COPY_CLASS(wxBkModeChanger);
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};
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} // namespace wxMSWImpl
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#endif // _MSW_PRIVATE_DC_H_
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