Improve display in high contrast mode

Src/Common/MDITabBar.cpp

@@ -98,6 +98,13 @@ static COLORREF getBackColor(bool onTitleBar)
 	return RGB(GetRValue(clr), std::clamp(GetGValue(clr) + 8, 0, 255), std::clamp(GetBValue(clr) + 8, 0, 255));
 }
 
+static inline bool IsHighContrastEnabled()
+{
+	HIGHCONTRAST hc = { sizeof(HIGHCONTRAST) };
+	SystemParametersInfo(SPI_GETHIGHCONTRAST, sizeof(hc), &hc, 0);
+	return (hc.dwFlags & HCF_HIGHCONTRASTON) != 0;
+}
+
 void CMyTabCtrl::OnPaint() 
 {
 	CPaintDC dc(this);
@@ -360,16 +367,16 @@ void CMyTabCtrl::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
 	if (lpDraw->itemState & ODS_SELECTED)
 	{
 		const COLORREF clrShadow = CEColor::GetIntermediateColor(GetSysColor(COLOR_3DSHADOW), getBackColor(m_bOnTitleBar), 0.5f);
-		if (GetSysColor(COLOR_3DFACE) == GetSysColor(COLOR_WINDOW))
+		if (IsHighContrastEnabled())
 		{
-			DrawRoundedRectWithShadow(lpDraw->hDC, rc.left + sw, rc.top + sw - 1, rc.Width() - sw * 2, rc.top - sw * 2 + 2, r, sw,
+			DrawRoundedRectWithShadow(lpDraw->hDC, rc.left + sw, rc.top + sw - 1, rc.Width() - sw * 2, rc.Height() - rc.top - sw * 2 + 2, r, sw,
 				GetSysColor(COLOR_HIGHLIGHT), clrShadow, getBackColor(m_bOnTitleBar));
 			SetTextColor(lpDraw->hDC, GetSysColor(COLOR_HIGHLIGHTTEXT));
 		}
 		else
 		{
 			DrawRoundedRectWithShadow(lpDraw->hDC, rc.left + sw, rc.top + sw - 1, rc.Width() - sw * 2, rc.Height() - sw * 2 + 2, r, sw,
-				GetSysColor(COLOR_WINDOW), clrShadow, getBackColor(m_bOnTitleBar));
+				GetSysColor(COLOR_3DHIGHLIGHT), clrShadow, getBackColor(m_bOnTitleBar));
 			SetTextColor(lpDraw->hDC, getTextColor());
 		}
 	}

Src/FilepathEdit.cpp

@@ -293,10 +293,12 @@ void CFilepathEdit::OnPaint()
 	{
 		CClientDC dc(this);
 		CFont *pFontOld = dc.SelectObject(GetFont());	
+		int oldTextColor = dc.SetTextColor(m_crText);
 		int oldBkMode = dc.SetBkMode(TRANSPARENT);
 		CRect rc = GetMenuCharRect(&dc);
 		dc.TextOutW(rc.left, 0, IsWin7_OrGreater() ? _T("\u2261") : _T("="));
 		dc.SetBkMode(oldBkMode);
+		dc.SetTextColor(oldTextColor);
 		dc.SelectObject(pFontOld);
 	}
 }

Src/MenuBar.cpp

@@ -45,6 +45,13 @@ CMenuBar::CMenuBar()
 	m_pThis = this;
 }
 
+static inline bool IsHighContrastEnabled()
+{
+	HIGHCONTRAST hc = { sizeof(HIGHCONTRAST) };
+	SystemParametersInfo(SPI_GETHIGHCONTRAST, sizeof(hc), &hc, 0);
+	return (hc.dwFlags & HCF_HIGHCONTRASTON) != 0;
+}
+
 static TBBUTTON makeTBButton(int id, const TCHAR* str)
 {
 	TBBUTTON btn{ I_IMAGENONE, id, TBSTATE_ENABLED, BTNS_BUTTON | BTNS_DROPDOWN | BTNS_AUTOSIZE };
@@ -211,8 +218,8 @@ void CMenuBar::OnCustomDraw(NMHDR* pNMHDR, LRESULT* pResult)
 	}
 	else if (dwDrawState == CDDS_ITEMPREPAINT)
 	{
-		pNMCD->clrHighlightHotTrack = GetSysColor(COLOR_3DFACE);
-		pNMCD->clrText = GetSysColor(COLOR_MENUTEXT);
+		pNMCD->clrHighlightHotTrack = GetSysColor(IsHighContrastEnabled() ? COLOR_HIGHLIGHT : COLOR_3DFACE);
+		pNMCD->clrText = GetSysColor(COLOR_BTNTEXT);
 		*pResult = CDRF_DODEFAULT | TBCDRF_USECDCOLORS | TBCDRF_HILITEHOTTRACK;
 		return;
 	}

Src/MyReBar.cpp

@@ -9,11 +9,19 @@ CMyReBar::CMyReBar()
 {
 }
 
+static inline bool IsHighContrastEnabled()
+{
+	HIGHCONTRAST hc = { sizeof(HIGHCONTRAST) };
+	SystemParametersInfo(SPI_GETHIGHCONTRAST, sizeof(hc), &hc, 0);
+	return (hc.dwFlags & HCF_HIGHCONTRASTON) != 0;
+}
+
 BOOL CMyReBar::OnEraseBkgnd(CDC* pDC)
 {
 	CRect rect;
 	GetClientRect(&rect);
-	pDC->FillSolidRect(&rect, GetSysColor(COLOR_3DHIGHLIGHT));
+	pDC->FillSolidRect(&rect, GetSysColor(
+		IsHighContrastEnabled() ? COLOR_BTNFACE : COLOR_3DHIGHLIGHT));
 	return TRUE;
 }