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ResizeHandle.xaml.cs
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ResizeHandle.xaml.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace Rule
{
public enum ResizerPositions
{
Top,
Bottom,
Left,
Right
}
/// <summary>
/// Interaction logic for ResizeHandle.xaml
/// </summary>
public partial class ResizeHandle : Thumb
{
private Window window;
public ResizerPositions ResizerPosition
{
get { return (ResizerPositions)this.GetValue( ResizerPositionProperty ); }
set { this.SetValue( ResizerPositionProperty, value ); }
}
public static readonly DependencyProperty ResizerPositionProperty = DependencyProperty.Register(
"ResizerPosition", typeof( ResizerPositions ), typeof( ResizeHandle ), new PropertyMetadata( ResizerPositions.Top,
( obj, args ) => ( obj as ResizeHandle ).UpdateResizerPosition( (ResizerPositions)args.NewValue ) ) );
public ResizeHandle() : base()
{
InitializeComponent();
UpdateResizerPosition( ResizerPosition );
}
private void UpdateResizerPosition( ResizerPositions direction )
{
Cursor = (new [] { ResizerPositions.Top, ResizerPositions.Bottom } ).Contains( direction ) ? Cursors.SizeNS : Cursors.SizeWE;
}
private void Thumb_DragStarted( object sender, DragStartedEventArgs e )
{
var control = VisualTreeHelper.GetParent( this );
while( !( control is Window ) ) control = VisualTreeHelper.GetParent( control );
window = control as Window;
}
private void Thumb_DragDelta( object sender, DragDeltaEventArgs e )
{
switch( ResizerPosition )
{
case ResizerPositions.Top:
if( window.Height - e.VerticalChange > ActualHeight )
{
window.Top += e.VerticalChange;
window.Height -= e.VerticalChange;
}
break;
case ResizerPositions.Left:
if( window.Width - e.HorizontalChange > ActualWidth )
{
window.Left += e.HorizontalChange;
window.Width -= e.HorizontalChange;
}
break;
case ResizerPositions.Bottom:
if( window.Height + e.VerticalChange > ActualHeight )
{
window.Height += e.VerticalChange;
}
break;
case ResizerPositions.Right:
if( window.Width + e.HorizontalChange > ActualWidth )
{
window.Width += e.HorizontalChange;
}
break;
}
}
private void Thumb_DragCompleted( object sender, DragCompletedEventArgs e )
{
}
}
}