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SharpTreeViewItem.cs
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SharpTreeViewItem.cs
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using System.Linq;
using System.Windows.Controls;
using System.Windows;
using System.Windows.Input;
namespace ICSharpCode.TreeView
{
public class SharpTreeViewItem : ListViewItem
{
static SharpTreeViewItem()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(SharpTreeViewItem),
new FrameworkPropertyMetadata(typeof(SharpTreeViewItem)));
}
public SharpTreeNode Node
{
get { return DataContext as SharpTreeNode; }
}
public SharpTreeNodeView NodeView { get; internal set; }
public SharpTreeView ParentTreeView { get; internal set; }
protected override void OnKeyDown(KeyEventArgs e)
{
switch (e.Key) {
case Key.F2:
// if (SharpTreeNode.ActiveNodes.Count == 1 && Node.IsEditable) {
// Node.IsEditing = true;
// e.Handled = true;
// }
break;
case Key.Escape:
Node.IsEditing = false;
break;
}
}
protected override System.Windows.Automation.Peers.AutomationPeer OnCreateAutomationPeer()
{
return new SharpTreeViewItemAutomationPeer(this);
}
#region Mouse
Point startPoint;
bool wasSelected;
bool wasDoubleClick;
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
wasSelected = IsSelected;
if (!IsSelected) {
base.OnMouseLeftButtonDown(e);
}
if (Mouse.LeftButton == MouseButtonState.Pressed) {
startPoint = e.GetPosition(null);
CaptureMouse();
if (e.ClickCount == 2) {
wasDoubleClick = true;
}
}
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (IsMouseCaptured) {
var currentPoint = e.GetPosition(null);
if (Math.Abs(currentPoint.X - startPoint.X) >= SystemParameters.MinimumHorizontalDragDistance ||
Math.Abs(currentPoint.Y - startPoint.Y) >= SystemParameters.MinimumVerticalDragDistance) {
var selection = ParentTreeView.GetTopLevelSelection().ToArray();
if (Node.CanDrag(selection)) {
Node.StartDrag(this, selection);
}
}
}
}
protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
{
if (wasDoubleClick) {
wasDoubleClick = false;
Node.ActivateItem(e);
if (!e.Handled) {
if (!Node.IsRoot || ParentTreeView.ShowRootExpander) {
Node.IsExpanded = !Node.IsExpanded;
}
}
}
ReleaseMouseCapture();
if (wasSelected) {
base.OnMouseLeftButtonDown(e);
}
}
#endregion
#region Drag and Drop
protected override void OnDragEnter(DragEventArgs e)
{
ParentTreeView.HandleDragEnter(this, e);
}
protected override void OnDragOver(DragEventArgs e)
{
ParentTreeView.HandleDragOver(this, e);
}
protected override void OnDrop(DragEventArgs e)
{
ParentTreeView.HandleDrop(this, e);
}
protected override void OnDragLeave(DragEventArgs e)
{
ParentTreeView.HandleDragLeave(this, e);
}
#endregion
}
}