using System;
using System.Windows;
using System.Windows.Input;
using System.Windows.Interop;

namespace OpenSEMI.Ctrlib.Window
{
	public class CustomWnd : System.Windows.Window
	{
		private HwndSource curHwndSource = null;

		private HwndSourceHook curHwndSourceHook = null;

		static CustomWnd()
		{
			FrameworkElement.DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomWnd), new FrameworkPropertyMetadata(typeof(CustomWnd)));
		}

		public CustomWnd()
		{
			base.CommandBindings.Add(new CommandBinding(SystemCommands.CloseWindowCommand, CloseWindow));
			base.CommandBindings.Add(new CommandBinding(SystemCommands.MaximizeWindowCommand, MaximizeWindow, CanResizeWindow));
			base.CommandBindings.Add(new CommandBinding(SystemCommands.MinimizeWindowCommand, MinimizeWindow));
			base.CommandBindings.Add(new CommandBinding(SystemCommands.RestoreWindowCommand, RestoreWindow, CanResizeWindow));
		}

		private void CanResizeWindow(object sender, CanExecuteRoutedEventArgs e)
		{
			e.CanExecute = (base.ResizeMode == ResizeMode.CanResize || base.ResizeMode == ResizeMode.CanResizeWithGrip);
		}

		private void RestoreWindow(object sender, ExecutedRoutedEventArgs e)
		{
			base.WindowState = WindowState.Normal;
		}

		private void MinimizeWindow(object sender, ExecutedRoutedEventArgs e)
		{
			base.WindowState = WindowState.Minimized;
		}

		private void MaximizeWindow(object sender, ExecutedRoutedEventArgs e)
		{
			base.WindowState = WindowState.Maximized;
		}

		private void CloseWindow(object sender, ExecutedRoutedEventArgs e)
		{
			Close();
		}

		protected override void OnSourceInitialized(EventArgs e)
		{
			base.OnSourceInitialized(e);
			IntPtr handle = new WindowInteropHelper(this).Handle;
			curHwndSource = HwndSource.FromHwnd(handle);
			if (curHwndSource != null)
			{
				curHwndSourceHook = this.WndProc;
				curHwndSource.AddHook(curHwndSourceHook);
			}
		}

		private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
		{
			IntPtr zero = IntPtr.Zero;
			if (msg != 26)
			{
				handled = false;
			}
			return zero;
		}
	}
}