private void BeginDrag(MouseEventArgs e)
{
this.initialMousePosition = new Point(e.X, e.Y);
RadElement elementAtPoint = sourceComponentElementTree.GetElementAtPoint(this.initialMousePosition);
if (elementAtPoint == null)
{
return;
}
else
{
if ((elementAtPoint.Visibility != ElementVisibility.Visible))
{
return;
}
}
if (elementAtPoint is RadListElement)
{
return;
}
if (elementAtPoint is RadListVisualItem)
{
sourceListBox.SelectedItem = (elementAtPoint as RadListVisualItem).Data;
}
this.draggedItem = (elementAtPoint as RadListVisualItem).Data;
DragCancelEventArgs args = new DragCancelEventArgs(this.draggedItem, null);
if (args.Cancel)
{
this.draggedItem = null;
return;
}
RadDragEventArgs dragArgs = new RadDragEventArgs(this.draggedItem, null);
this.isRealDrag = false;
this.dragging = true;
if (this.feedBackForm == null)
{
feedBackForm = new FeedBackForm();
}
this.colorToSet = this.FeedbackFormLineColor();
this.feedBackForm.LineColor = this.colorToSet;
if (this.draggedItem != null)
{
PrepareDragging(e);
}
}
private void EndDrag(MouseEventArgs e)
{
this.dragging = false;
if (this.draggedItem != null)
{
if (targetListBox != null)
{
if (targetListBox == sourceListBox && sourceListBox.Items.Count == 1)
{
return;
}
Point p2 = new Point();
p2 = sourceListBox.PointToScreen(new Point(e.X, e.Y));
p2 = targetListBox.PointToClient(p2);
RadElement elementAtPoint = targetComponentElementTree.GetElementAtPoint(p2);
if (elementAtPoint != null)
{
if ((elementAtPoint.Visibility != ElementVisibility.Visible))
{
return;
}
//RadListVisualItem visualItem = elementAtPoint as RadListVisualItem;
//if (visualItem != null)
{
//replacedItem = visualItem.Data;
if (draggedItem == replacedItem)
{
return;
}
RefreshItemsAfterDragDrop(e);
}
}
if (this.outlineForm != null)
{
this.outlineForm.Dispose();
this.outlineForm = null;
}
if (this.feedBackForm != null)
{
this.feedBackForm.Dispose();
this.feedBackForm = null;
}
this.isRealDrag = false;
}
}
}
private void InitializeDragOperation(object sender, MouseEventArgs e)
{
sourceListBox = (RadListControl)sender;
sourceComponentElementTree = sourceListBox.ElementTree;
if (sourceComponentElementTree.RootElement.ElementTree != null && this.AllowDragDrop)
{
RadElement elementAtPoint = sourceComponentElementTree.GetElementAtPoint(e.Location);
if (elementAtPoint is RadListVisualItem)
{
if (e.Button == MouseButtons.Left)
{
sourceComponentElementTree.RootElement.ElementTree.Control.Capture = true;
BeginDrag(e);
}
}
}
}
private void DrawFeedBack(MouseEventArgs e)
{
if (targetListBox == null)
{
feedBackForm.Hide(); return;
}
this.targetComponentElementTree = this.targetListBox.ElementTree;
Point p4 = new Point();
p4 = sourceListBox.PointToScreen(new Point(e.X, e.Y));
p4 = targetListBox.PointToClient(p4);
RadElement elementAtPoint = targetComponentElementTree.GetElementAtPoint(p4);
RadListVisualItem visualReplacedItem = elementAtPoint as RadListVisualItem;
this.replacedItem = visualReplacedItem != null ? visualReplacedItem.Data : null;
if (visualReplacedItem == null)
{
feedBackForm.Hide(); return;
}
if (visualReplacedItem != null)
{
int UpperBound = visualReplacedItem.Bounds.Height * this.targetListBox.Items.IndexOf(this.replacedItem);
int MiddleBound = UpperBound + visualReplacedItem.Bounds.Height / 2;
int LowerBound = UpperBound + visualReplacedItem.Bounds.Height;
if (p4.Y < UpperBound || p4.Y > LowerBound)
{
//FeedBack shouldnt be drawn
feedBackForm.StartPoint = null;
}
if (p4.Y <= MiddleBound && p4.Y > UpperBound)
{
//FeedBack should be drawn above the replceditem
feedBackForm.StartPoint = this.targetListBox.PointToScreen(new Point(0 + 3, UpperBound + 1));
}
if (p4.Y <= LowerBound && p4.Y > MiddleBound)
{
//FeedBack should be drawn below the replaceditem
feedBackForm.StartPoint = this.targetListBox.PointToScreen(new Point(0 + 3, UpperBound + 1 + visualReplacedItem.Bounds.Height));
}
}
if (elementAtPoint is RadListElement)
{
if (targetListBox.Items.Count > 0)
{
RadListDataItem lastItem = this.targetListBox.Items[this.targetListBox.Items.Count - 1];
//FeedBack should be drawn always below the last item of the targetListBox
if (feedBackForm == null)
{
return;
}
feedBackForm.StartPoint = this.targetListBox.PointToScreen(new Point(3, 1 + lastItem.VisualItem.Bounds.Height * this.targetListBox.Items.IndexOf(lastItem) + lastItem.VisualItem.Bounds.Height));
}
else
{
feedBackForm.StartPoint = null;
}
}
SetFeedBackForm();
}
