Articles

WindowBehavior

This behavior brings you the possibilities to let a command called if a window is loaded, closing or closed. The closing can be canceled by an additional parameter. Furthermore it is possible to let the DialogResult set by a button or ask a command how to set the DialogResult. It is usefully especially for MVVM applications.

Usage

<Window x:Class="DW.Interactivity.Demo.DemoWindow"
		xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
		xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
		xmlns:Interactivity="http://schemas.my-libraries.de/wpf/interactivity"
		Interactivity:WindowBehavior.LoadedCommand="{Binding LoadedCommand}"
		Interactivity:WindowBehavior.ClosingCommand="{Binding ClosingCommand}"
		Interactivity:WindowBehavior.WinApiMessages="0x216;0x214"
		Interactivity:WindowBehavior.WinApiCommand="{Binding WinApiCommand}"
		Title="DemoWindow"
		Height="300"
		Width="300">
	<DockPanel>
		<StackPanel DockPanel.Dock="Top" HorizontalAlignment="Center">
			<GroupBox Header="Modal Window">
				<StackPanel>
					<Button Content="Close as OK" Interactivity:WindowBehavior.DialogResult="True" />
					<Button Content="Close as Cancel" Interactivity:WindowBehavior.DialogResult="False" />
					<Button Content="Close with Command" Interactivity:WindowBehavior.DialogResultCommand="{Binding ClosingCommand}" />
				</StackPanel>
			</GroupBox>
			<GroupBox Header="Non-Modal Window">
				<Button Content="Close" Interactivity:WindowBehavior.IsClose="True" />
			</GroupBox>
		</StackPanel>
		<ListBox ItemsSource="{Binding Items}" />
	</DockPanel>
</Window>

using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Input;
using DW.SharpTools;

namespace DW.Interactivity.Demo
{
	public partial class DemoWindow : Window
	{
		public DemoWindow()
		{
			InitializeComponent();
			DataContext = this;

			Items = new ObservableCollection<string>();

			LoadedCommand = new DelegateCommand(p => WindowLoaded());
			ClosingCommand = new DelegateCommand(WindowClosing);
			WinApiCommand = new DelegateCommand(WinApi);
		}

		public ICommand LoadedCommand { get; set; }
		private void WindowLoaded()
		{
			MessageBox.Show(this, "Loaded");
		}

		public ICommand ClosingCommand { get; set; }
		private void WindowClosing(object arg)
		{
			var e = (WindowClosingArgs)arg;

			if (MessageBox.Show(this, "Close?", "Demo", MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.No)
				e.Cancel = true;
		}

		public ICommand WinApiCommand { get; set; }

		public ObservableCollection<string> Items { get; set; }

		private int _moveCount = 1;
		private int _sizeCount = 1;

		private void WinApi(object arg)
		{
			var e = (NotifyEventArgs)arg;

			if (e.MessageId == WindowMessages.WM_MOVING)
				Items.Insert(0, string.Format("{0} WM_MOVING", _moveCount++));
			else if (e.MessageId == WindowMessages.WM_SIZING)
				Items.Insert(0, string.Format("{0} WM_SIZING", _sizeCount++));
		}
	}
}

Note

This control needs the DW.SharpTools.