+// various classes to change some DC property temporarily
+
+// text background and foreground colours
+class wxTextColoursChanger
+{
+public:
+ wxTextColoursChanger(HDC hdc, const wxMSWDCImpl& dc)
+ : m_hdc(hdc)
+ {
+ Change(dc.GetTextForeground(), dc.GetTextBackground());
+ }
+
+ wxTextColoursChanger(HDC hdc, const wxColour& colFg, const wxColour& colBg)
+ : m_hdc(hdc)
+ {
+ Change(colFg, colBg);
+ }
+
+ ~wxTextColoursChanger()
+ {
+ if ( m_oldColFg != CLR_INVALID )
+ ::SetTextColor(m_hdc, m_oldColFg);
+ if ( m_oldColBg != CLR_INVALID )
+ ::SetBkColor(m_hdc, m_oldColBg);
+ }
+
+protected:
+ // this ctor doesn't change mode immediately, call Change() later to do it
+ // only if needed
+ wxTextColoursChanger(HDC hdc)
+ : m_hdc(hdc)
+ {
+ m_oldColFg =
+ m_oldColBg = CLR_INVALID;
+ }
+
+ void Change(const wxColour& colFg, const wxColour& colBg)
+ {
+ if ( colFg.IsOk() )
+ {
+ m_oldColFg = ::SetTextColor(m_hdc, colFg.GetPixel());
+ if ( m_oldColFg == CLR_INVALID )
+ {
+ wxLogLastError(_T("SetTextColor"));
+ }
+ }
+ else
+ {
+ m_oldColFg = CLR_INVALID;
+ }
+
+ if ( colBg.IsOk() )
+ {
+ m_oldColBg = ::SetBkColor(m_hdc, colBg.GetPixel());
+ if ( m_oldColBg == CLR_INVALID )
+ {
+ wxLogLastError(_T("SetBkColor"));
+ }
+ }
+ else
+ {
+ m_oldColBg = CLR_INVALID;
+ }
+ }
+
+private:
+ const HDC m_hdc;
+ COLORREF m_oldColFg,
+ m_oldColBg;
+
+ wxDECLARE_NO_COPY_CLASS(wxTextColoursChanger);
+};
+
+// background mode
+class wxBkModeChanger
+{
+public:
+ // set background mode to opaque if mode != wxBRUSHSTYLE_TRANSPARENT
+ wxBkModeChanger(HDC hdc, int mode)
+ : m_hdc(hdc)
+ {
+ Change(mode);
+ }
+
+ ~wxBkModeChanger()
+ {
+ if ( m_oldMode )
+ ::SetBkMode(m_hdc, m_oldMode);
+ }
+
+protected:
+ // this ctor doesn't change mode immediately, call Change() later to do it
+ // only if needed
+ wxBkModeChanger(HDC hdc) : m_hdc(hdc) { m_oldMode = 0; }
+
+ void Change(int mode)
+ {
+ m_oldMode = ::SetBkMode(m_hdc, mode == wxBRUSHSTYLE_TRANSPARENT
+ ? TRANSPARENT
+ : OPAQUE);
+ if ( !m_oldMode )
+ {
+ wxLogLastError(_T("SetBkMode"));
+ }
+ }
+
+private:
+ const HDC m_hdc;
+ int m_oldMode;
+
+ wxDECLARE_NO_COPY_CLASS(wxBkModeChanger);
+};
+