add last backwards-compatible version

foobar2000/ATLHelpers/CIconOverlayWindow.h

@@ -0,0 +1,47 @@
+#pragma once
+
+#include "../ATLHelpers/misc.h"
+
+typedef CWinTraits<WS_POPUP,WS_EX_LAYERED> __COverlayWindowTraits;
+
+class CIconOverlayWindow : public CWindowImpl<CIconOverlayWindow,CWindow,__COverlayWindowTraits> {
+public:
+	DECLARE_WND_CLASS_EX(TEXT("{384298D0-4370-4f9b-9C36-49FC1A396DC7}"),0,(-1));
+
+	void AttachIcon(HICON p_icon) {m_icon = p_icon;}
+	bool HaveIcon() const {return m_icon != NULL;}
+
+	enum {
+		ColorKey = 0xc0ffee
+	};
+
+	BEGIN_MSG_MAP(CIconOverlayWindow)
+		MESSAGE_HANDLER(WM_CREATE,OnCreate);
+		MESSAGE_HANDLER(WM_PAINT,OnPaint);
+		MESSAGE_HANDLER(WM_ERASEBKGND,OnEraseBkgnd);
+	END_MSG_MAP()
+private:
+	LRESULT OnCreate(UINT,WPARAM,LPARAM,BOOL&) {
+		::SetLayeredWindowAttributes(*this,ColorKey,0,LWA_COLORKEY);
+		return 0;
+	}
+	LRESULT OnEraseBkgnd(UINT,WPARAM p_wp,LPARAM,BOOL& bHandled) {
+		CRect rcClient;
+		WIN32_OP_D( GetClientRect(rcClient) );
+		CDCHandle((HDC)p_wp).FillSolidRect(rcClient,ColorKey);
+		return 1;
+	}
+	LRESULT OnPaint(UINT,WPARAM,LPARAM,BOOL& bHandled) {
+		if (m_icon != NULL) {
+			CPaintDC dc(*this);
+			CRect client;
+			WIN32_OP_D( GetClientRect(&client) );
+			dc.DrawIconEx(0,0,m_icon,client.right,client.bottom);
+			//CDCHandle(ps.hdc).DrawIcon(0,0,m_icon);
+		} else {
+			bHandled = FALSE;
+		}
+		return 0;
+	}
+	CIcon m_icon;
+};