void Shape_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (Mouse.LeftButton != MouseButtonState.Pressed)
{
return;
}
System.Windows.Point pos = e.GetPosition(MainMap);
HitTestResult result = VisualTreeHelper.HitTest(MainMap, pos);
if (result == null)
{
return;
}
PositionMarker marker = (PositionMarker)sender;
DragDropAdorner adorner = new DragDropAdorner(marker);
mAdornerLayer = AdornerLayer.GetAdornerLayer(grid1); // Window class do not have AdornerLayer
mAdornerLayer.Add(adorner);
System.Windows.DragDrop.DoDragDrop(marker, marker, DragDropEffects.Copy);
mStartHoverTime = DateTime.MinValue;
mAdornerLayer.Remove(adorner);
mAdornerLayer = null;
}
/// <summary>
/// Invoked when an unhandled PreviewMouseMove�routed event reaches the element in its route.
/// </summary>
/// <param name="e">The MouseEventArgs that contains the event data.</param>
protected override void OnPreviewMouseMove(MouseEventArgs e)
{
// If the mouse button was pressed, the mouse move starts the drag operation.
// Create adorner element used to display the snapshot of the element while dragging.
if (this.mouseDown)
{
this.mouseMovePosition = e.GetPosition(this);
if (this.CanDrag(this.mouseDownPosition, this.mouseMovePosition))
{
if (Mouse.Captured == null)
{
Mouse.Capture(this);
}
if (this.adorner == null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
this.adorner = new DragDropAdorner(this);
adornerLayer.Add(this.adorner);
}
}
if (this.adorner != null)
{
this.adorner.Left = this.mouseMovePosition.X - this.mouseDownPosition.X;
this.adorner.Top = this.mouseMovePosition.Y - this.mouseDownPosition.Y;
}
}
}
base.OnPreviewMouseMove(e);
}
/// <summary>
/// Destroy all resources associated with the adorner used for drag operation.
/// </summary>
private void DestroyAdorner()
{
if (this.adorner != null)
{
if (this.storyboard != null)
{
this.storyboard.Completed -= new EventHandler(this.Storyboard_Completed);
this.storyboard = null;
INameScope nameScope = NameScope.GetNameScope(this);
if (nameScope != null)
{
UnregisterName(this.adorner.Name);
NameScope.SetNameScope(this, null);
}
}
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Remove(this.adorner);
}
this.adorner = null;
}
}
protected void DragFinished(DragDropEffects ret)
{
if (_adorner != null)
{
AdornerLayer.GetAdornerLayer(_source).Remove(_adorner);
}
_adorner = null;
}
/// <summary>
/// 拖动
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TODO_ListView_PreviewMouseMove(object sender, MouseEventArgs e)
{
try
{
if (Mouse.LeftButton != MouseButtonState.Pressed)
{
return;
}
Point pos = e.GetPosition(TODO_ListView);
HitTestResult result = VisualTreeHelper.HitTest(TODO_ListView, pos);
if (result == null)
{
return;
}
ListBoxItem listBoxItem = Utils.FindVisualParent <ListBoxItem>(result.VisualHit);
if (listBoxItem == null || listBoxItem.Content != TODO_ListView.SelectedItem || (TODO_ListView.SelectedItem as todo_list).IsEnabled_TODO == true)
{
return;
}
if (!hadAddEvent)
{
TODO_ListView.QueryContinueDrag += TODO_ListView_QueryContinueDrag;
hadAddEvent = true;
}
//添加修饰器：拖动时跟随鼠标移动显示
DragDropAdorner adorner = new DragDropAdorner(listBoxItem);
mAdornerLayer = AdornerLayer.GetAdornerLayer(mGrid);
mAdornerLayer.Add(adorner);
//获取数据上下文
DataObject dataObject = new DataObject(typeof(ContentControl), listBoxItem.DataContext);
//启动拖放
DragDrop.DoDragDrop(TODO_ListView, dataObject, DragDropEffects.Copy);
mAdornerLayer.Remove(adorner);
mAdornerLayer = null;
hadAddEvent = false;
DropShadowEffect outerGlow = new DropShadowEffect();
outerGlow.ShadowDepth = 0;
outerGlow.Color = Color.FromRgb(255, 255, 255);
outerGlow.BlurRadius = 0;
Shine.Effect = outerGlow;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
private void DragStarted()
{
try
{
_isDragging = true;
_overlayElement = new DragDropAdorner(_originalElement, Tag);
AdornerLayer layer = AdornerLayer.GetAdornerLayer(_originalElement);
layer.Add(_overlayElement);
}
catch (Exception ex)
{
VMuktiHelper.ExceptionHandler(ex, "DragStarted()", "Controls\\ModuleExplorer\\CtlModule.xaml.cs");
}
}
private void MouseHisDataGrid_OnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
//---获取拖拽行---
Point position = e.GetPosition(MouseHisDataGrid);
var row = UIHelpers.TryFindFromPoint <DataGridRow>(MouseHisDataGrid, position);
if (row == null)
{
return;
}
isDragging = true; //开始拖拽
DragDropAdorner adorner = new DragDropAdorner(row);
var mAdornerLayer = AdornerLayer.GetAdornerLayer(MouseHisDataGrid); // Window class do not have AdornerLayer
mAdornerLayer.Add(adorner);
}
private void listBoxPreviewMouseMove(object sender, MouseEventArgs e)
{
ListBox listBox = sender as ListBox;
if (Mouse.LeftButton != MouseButtonState.Pressed)
{
return;
}
Point pos = e.GetPosition(listBox);
HitTestResult result = VisualTreeHelper.HitTest(listBox, pos);
if (result == null)
{
return;
}
ListBoxItem listBoxItem = Utils.FindVisualParent <ListBoxItem>(result.VisualHit); // Find your actual visual you want to drag
// if (listBoxItem == null || listBoxItem.Content != listBox.SelectedItem || !(listBox.SelectedItem is DataItem))
if (listBoxItem == null)
{
//if (listBoxItem == null || listBoxItem.Content != listBox.SelectedItem)
return;
}
DragDropAdorner adorner = new DragDropAdorner(listBoxItem);
mAdornerLayer = AdornerLayer.GetAdornerLayer(DragableGrid); // Window class do not have AdornerLayer
mAdornerLayer.Add(adorner);
//DataItem dataItem = listBoxItem.Content as DataItem;
DataObject dataObject = new DataObject(listBoxItem);
// Here, we should notice that dragsource param will specify on which
// control the drag&drop event will be fired
System.Windows.DragDrop.DoDragDrop(listBox, dataObject, DragDropEffects.Copy);
mStartHoverTime = DateTime.MinValue;
mHoveredItem = null;
mAdornerLayer.Remove(adorner);
mAdornerLayer = null;
}
private void DragFinished(bool cancelled)
{
try
{
System.Windows.Input.Mouse.Capture(null);
if (_overlayElement != null)
{
AdornerLayer.GetAdornerLayer(_overlayElement.AdornedElement).Remove(_overlayElement);
}
_overlayElement = null;
_originalElement = null;
_isDragging = false;
_isDown = false;
}
catch (Exception ex)
{
VMuktiHelper.ExceptionHandler(ex, "DragFinished()", "Controls\\ModuleExplorer\\CtlModule.xaml.cs");
}
}
private void _gridheader_MouseMove(object sender, MouseEventArgs e)
{
if (ptStartDrag.X != -1 && ptStartDrag.Y != -1)
{
Point ptNow = e.GetPosition(_gridheader);
if (Math.Abs(ptNow.X - ptStartDrag.X) > 5 && _gridheader.IsAdjustingColumn == false)
{
// 说明开始拖拽操作了
double d = ptStartDrag.X;
int iColumn = _gridheader.GetCellColumn(ref d);
DragDropAdorner adorner = new DragDropAdorner(_gridheader, _gridheader.GetColumSnapshot(iColumn));
DataObject data = new DataObject(typeof(int), iColumn);
mAdornerLayer = AdornerLayer.GetAdornerLayer(this);
mAdornerLayer.Add(adorner);
DragDrop.DoDragDrop(_gridheader, data, DragDropEffects.Move);
mAdornerLayer.Remove(adorner);
mAdornerLayer = null;
ptStartDrag = new Point(-1, -1); // 这里还原成初始状态
}
}
}
private void DoDragDrop(object dragItem, UIElement adornerSource)
{
if (adornerSource != null)
{
var rect = VisualTreeHelper.GetDescendantBounds(adornerSource);
var size = new Size((double)Math.Ceiling(rect.Width), (double)Math.Ceiling(rect.Height));
var brush = new VisualBrush(adornerSource);
_adorner = new DragDropAdorner(_dragScope, size, brush);
_adorner.Opacity = 0.7;
_adorner.Visibility = Visibility.Hidden;
}
DragDrop.AddPreviewDragEnterHandler(_dragScope, _dragEnter);
DragDrop.AddPreviewDragOverHandler(_dragScope, _dragOver);
DragDrop.AddPreviewDragLeaveHandler(_dragScope, _dragLeave);
var resultEffects = DragDrop.DoDragDrop(_source, dragItem, DragDropEffects.All);
DragFinished(resultEffects);
DragDrop.RemovePreviewDragEnterHandler(_dragScope, _dragEnter);
DragDrop.RemovePreviewDragOverHandler(_dragScope, _dragOver);
DragDrop.RemovePreviewDragLeaveHandler(_dragScope, _dragLeave);
}
