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C# TreeViewItem.InvalidateProperty方法代码示例

本文整理汇总了C#中System.Windows.Controls.TreeViewItem.InvalidateProperty方法的典型用法代码示例。如果您正苦于以下问题:C# TreeViewItem.InvalidateProperty方法的具体用法?C# TreeViewItem.InvalidateProperty怎么用?C# TreeViewItem.InvalidateProperty使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在System.Windows.Controls.TreeViewItem的用法示例。


在下文中一共展示了TreeViewItem.InvalidateProperty方法的3个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: OnDragEvent

        /// <summary>
        /// Called when an item is dragged over the TreeViewItem.
        /// </summary>
        /// <param name="sender">The sender.</param>
        /// <param name="args">The <see cref="System.Windows.DragEventArgs"/> instance containing the event data.</param>
        static void OnDragEvent(object sender, DragEventArgs args)
        {
            lock (IsPossibleDropTargetProperty)
            {
                _dropPossible = false;

                if (_currentItem != null)
                {
                    // Tell the item that previously had the mouse that it no longer does.
                    DependencyObject oldItem = _currentItem;
                    _currentItem = null;
                    oldItem.InvalidateProperty(IsPossibleDropTargetProperty);
                }

                if (args.Effects != DragDropEffects.None)
                {
                    _dropPossible = true;
                }

                TreeViewItem tvi = sender as TreeViewItem;
                if (tvi != null)
                {
                    _currentItem = tvi;
                    // Tell that item to re-calculate the IsPossibleDropTarget property
                    _currentItem.InvalidateProperty(IsPossibleDropTargetProperty);
                }
            }
        }
开发者ID:johncapehart,项目名称:PsISEProjectExplorer,代码行数:33,代码来源:TreeViewDropHighlighter.cs

示例2: OnUpdateOverItem

        //
        // OnUpdateOverItem:  This method is a listener for the UpdateOverItemEvent.  When it is received,
        // it means that the sender is the closest TreeViewItem to the mouse (closest in the sense of the
        // tree, not geographically).
        static void OnUpdateOverItem(object sender, RoutedEventArgs args)
        {
            // Mark this object as the tree view item over which the mouse
            // is currently positioned.
            _currentItem = sender as TreeViewItem;

            // Tell that item to re-calculate the IsMouseDirectlyOverItem property
            _currentItem.InvalidateProperty(IsMouseDirectlyOverItemProperty);

            // Prevent this event from notifying other tree view items higher in the tree.
            args.Handled = true;
        }
开发者ID:alekkowalczyk,项目名称:a7DocumentDbStudio,代码行数:16,代码来源:a7TreeViewHelper.cs

示例3: AquireItem

 private static void AquireItem(object sender)
 {
     var tvi = sender as TreeViewItem;
     if (tvi != null)
     {
         _currentItem = tvi;
         // Tell that item to re-calculate the IsPossibleDropTarget property
         _currentItem.InvalidateProperty(IsPossibleDropTargetProperty);
     }
 }
开发者ID:VisualFinance,项目名称:VisualFinance.Windows,代码行数:10,代码来源:TreeViewDragBehavior.cs


注:本文中的System.Windows.Controls.TreeViewItem.InvalidateProperty方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。