Hid piano during resizing to avoid slowness, and flickering on Aero.

include/PianoControl.hpp

@@ -36,6 +36,9 @@ public:
     virtual void SetKeyText(int key, LPCWSTR text);
     virtual LPCWSTR GetKeyText(int key);
 
+    virtual void DisableDraw();
+    virtual void EnableDraw();
+
     virtual void SetBackground(HBRUSH background) { hBackground = background; }
     virtual HBRUSH GetBackground() { return hBackground; }
     

src/MainWindow.cpp

@@ -103,7 +103,7 @@ static LPWSTR keychars =
     L"\"-\0" // D5
     L"]\0" // D#5
     L"=\x21b5\0" // E5
-    L"\x2190\0" // F5
+    L"\x2190\\\0" // F5
 ;
 
 static WORD frequency[] = {
@@ -740,9 +740,11 @@ LRESULT MainWindow::HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam)
         return 0;
     case WM_ENTERSIZEMOVE:
         SetWindowLongPtr(m_hwnd, GWL_EXSTYLE, GetWindowLongPtr(m_hwnd, GWL_EXSTYLE) | WS_EX_COMPOSITED);
+        piano->DisableDraw();
         return 0;
     case WM_EXITSIZEMOVE:
         SetWindowLongPtr(m_hwnd, GWL_EXSTYLE, GetWindowLongPtr(m_hwnd, GWL_EXSTYLE) & ~WS_EX_COMPOSITED);
+        piano->EnableDraw();
         return 0;
     case MMWM_NOTEID: {
         int note = wParam + 54;

src/PianoControl.cpp

@@ -495,6 +495,15 @@ void PianoControl::OnPaint()
     EndPaint(m_hwnd, &ps);
 }
 
+void PianoControl::DisableDraw() {
+    SendMessage(m_hwnd, WM_SETREDRAW, FALSE, 0);
+}
+
+void PianoControl::EnableDraw() {
+    SendMessage(m_hwnd, WM_SETREDRAW, TRUE, 0);
+    RedrawWindow(m_hwnd, NULL, NULL, RDW_FRAME | RDW_INVALIDATE);
+}
+
 LRESULT PianoControl::HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     switch (uMsg) {

src/Window.cpp

@@ -25,7 +25,7 @@ void Window::Register()
     wc.hInstance     = GetInstance();
     wc.hIcon         = GetIcon();
     wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
-    wc.hbrBackground = CreateSolidBrush(RGB(0xF0, 0xF0, 0xF0));
+    wc.hbrBackground = (HBRUSH) (COLOR_3DFACE + 1);
     wc.lpszMenuName  = NULL;
     wc.lpszClassName = ClassName();