ToolboxItem.cs
1.7 KB
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using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Markup;
namespace RoboforkApp
{
public class ToolboxItem : ContentControl
{
private Point? dragStartPoint = null;
static ToolboxItem()
{
FrameworkElement.DefaultStyleKeyProperty.OverrideMetadata(typeof(ToolboxItem), new FrameworkPropertyMetadata(typeof(ToolboxItem)));
}
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
this.dragStartPoint = new Point?(e.GetPosition(this));
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (e.LeftButton != MouseButtonState.Pressed)
{
this.dragStartPoint = null;
}
if (this.dragStartPoint.HasValue)
{
Point position = e.GetPosition(this);
if ((SystemParameters.MinimumHorizontalDragDistance <=
Math.Abs((double)(position.X - this.dragStartPoint.Value.X))) ||
(SystemParameters.MinimumVerticalDragDistance <=
Math.Abs((double)(position.Y - this.dragStartPoint.Value.Y))))
{
string xamlString = XamlWriter.Save(this.Content);
DataObject dataObject = new DataObject("DESIGNER_ITEM", xamlString);
if (dataObject != null)
{
DragDrop.DoDragDrop(this, dataObject, DragDropEffects.Copy);
}
}
e.Handled = true;
}
}
}
}