wpf - WPF で左右の傾きを処理する

Question

WPFで左に傾けたり右に傾けたりするマウスイベントを処理するにはどうすればよいですか? 代替テキスト http://s3images.coroflot.com/user_files/individual_files/featured/featured_1266_st_dVYgtBSHIQRPzXvrG4WnUW.jpg

Answer 1

WPF UserControl で WndProc を実装する方法を見つけました。UserControl は、私の例の AppendWindow メソッドのようにウィンドウ ポインターを取得する必要があります。

private static MyUserControl instanceWithFocus;

public void AppendWindow(Window window) {
    HwndSource source = HwndSource.FromHwnd(new WindowInteropHelper(window).Handle);
    source.AddHook(new HwndSourceHook(WndProc));
}

private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) {
    switch (msg) {
        case Win32Messages.WM_MOUSEHWHEEL:
            MouseWheelTilt(wParam, lParam);
            handled = true;
            break;
        default:
            break;
    }
    return IntPtr.Zero;
}

private static void MouseWheelTilt(IntPtr wParam, IntPtr lParam) {
    Int32 tilt = (Int16)Utils.HIWORD(wParam);
    Int32 keys = Utils.LOWORD(wParam);
    Int32 x = Utils.LOWORD(lParam);
    Int32 y = Utils.HIWORD(lParam);

    // call an event on active instance of this object
    if (instanceWithFocus != null) {
        instanceWithFocus.MouseWheelTilt(tilt, keys, x, y);
    }
}

private void MouseWheelTilt(Int32 tilt, Int32 keys, Int32 x, Int32 y) {
    scrollViewer.ScrollToHorizontalOffset(scrollViewer.HorizontalOffset + tilt);
}

private void UserControl_MouseEnter(object sender, MouseEventArgs e) {
    instanceWithFocus = this;
}

private void UserControl_MouseLeave(object sender, MouseEventArgs e) {
    instanceWithFocus = null;
}

abstract class Win32Messages {
    public const int WM_MOUSEHWHEEL = 0x020E;
}

abstract class Utils {

    internal static Int32 HIWORD(IntPtr ptr) {
        Int32 val32 = ptr.ToInt32();
        return ((val32 >> 16) & 0xFFFF);
    }

    internal static Int32 LOWORD(IntPtr ptr) {
        Int32 val32 = ptr.ToInt32();
        return (val32 & 0xFFFF);
    }

}