// Set values before initiating the Drag-Drop
private void SetParentDesignerValuesForDragDrop(ToolStripItem glyphItem, bool setValues, Point mouseLoc)
{
if (glyphItem.Site is null)
{
return;
}
// Remember the point where the mouse down occurred. The DragSize indicates the size that the mouse can move before a drag event should be started.
Size dragSize = new Size(1, 1);
IDesignerHost designerHost = (IDesignerHost)glyphItem.Site.GetService(typeof(IDesignerHost));
Debug.Assert(designerHost != null, "Invalid DesignerHost");
// implement Drag Drop for individual ToolStrip Items While this item is getting selected.. Get the index of the item the mouse is below.
if (glyphItem.Placement == ToolStripItemPlacement.Overflow || (glyphItem.Placement == ToolStripItemPlacement.Main && !(glyphItem.IsOnDropDown)))
{
ToolStripItemDesigner itemDesigner = designerHost.GetDesigner(glyphItem) as ToolStripItemDesigner;
ToolStrip parentToolStrip = itemDesigner.GetMainToolStrip();
if (designerHost.GetDesigner(parentToolStrip) is ToolStripDesigner parentDesigner)
{
if (setValues)
{
parentDesigner.IndexOfItemUnderMouseToDrag = parentToolStrip.Items.IndexOf(glyphItem);
// Create a rectangle using the DragSize, with the mouse position being at the center of the rectangle. On SelectionChanged we recreate the Glyphs ... so need to stash this value on the parentDesigner....
parentDesigner.DragBoxFromMouseDown = _dragBoxFromMouseDown = new Rectangle(new Point(mouseLoc.X - (dragSize.Width / 2), mouseLoc.Y - (dragSize.Height / 2)), dragSize);
}
else
{
parentDesigner.IndexOfItemUnderMouseToDrag = -1;
parentDesigner.DragBoxFromMouseDown = _dragBoxFromMouseDown = Rectangle.Empty;
}
}
}
else if (glyphItem.IsOnDropDown)
{
//Get the OwnerItem's Designer and set the value...
if (glyphItem.Owner is ToolStripDropDown parentDropDown)
{
ToolStripItem ownerItem = parentDropDown.OwnerItem;
if (designerHost.GetDesigner(ownerItem) is ToolStripItemDesigner ownerItemDesigner)
{
if (setValues)
{
ownerItemDesigner.indexOfItemUnderMouseToDrag = parentDropDown.Items.IndexOf(glyphItem);
// Create a rectangle using the DragSize, with the mouse position being at the center of the rectangle. On SelectionChanged we recreate the Glyphs ... so need to stash this value on the parentDesigner....
ownerItemDesigner.dragBoxFromMouseDown = _dragBoxFromMouseDown = new Rectangle(new Point(mouseLoc.X - (dragSize.Width / 2), mouseLoc.Y - (dragSize.Height / 2)), dragSize);
}
else
{
ownerItemDesigner.indexOfItemUnderMouseToDrag = -1;
ownerItemDesigner.dragBoxFromMouseDown = _dragBoxFromMouseDown = Rectangle.Empty;
}
}
}
}
}
/// <summary>
/// When any MouseMove message enters the BehaviorService's AdornerWindow (mousemove, ncmousemove) it is first passed here, to the top-most Behavior in the BehaviorStack. Returning 'true' from this function signifies that the Message was 'handled' by the Behavior and should not continue to be processed.
/// </summary>
public override bool OnMouseMove(Glyph g, MouseButtons button, Point mouseLoc)
{
bool retVal = false;
ToolStripItemGlyph glyph = g as ToolStripItemGlyph;
ToolStripItem glyphItem = glyph.Item;
ISelectionService selSvc = GetSelectionService(glyphItem);
if (selSvc == null || glyphItem.Site == null || MouseHandlerPresent(glyphItem))
{
return(false);
}
if (!selSvc.GetComponentSelected(glyphItem))
{
PaintInsertionMark(glyphItem);
retVal = false;
}
if (button == MouseButtons.Left && glyph != null && glyph.ItemDesigner != null && !glyph.ItemDesigner.IsEditorActive)
{
Rectangle dragBox = Rectangle.Empty;
IDesignerHost designerHost = (IDesignerHost)glyphItem.Site.GetService(typeof(IDesignerHost));
Debug.Assert(designerHost != null, "Invalid DesignerHost");
if (glyphItem.Placement == ToolStripItemPlacement.Overflow || (glyphItem.Placement == ToolStripItemPlacement.Main && !(glyphItem.IsOnDropDown)))
{
ToolStripItemDesigner itemDesigner = glyph.ItemDesigner;
ToolStrip parentToolStrip = itemDesigner.GetMainToolStrip();
if (designerHost.GetDesigner(parentToolStrip) is ToolStripDesigner parentDesigner)
{
dragBox = parentDesigner.DragBoxFromMouseDown;
}
}
else if (glyphItem.IsOnDropDown)
{
//Get the OwnerItem's Designer and set the value...
if (glyphItem.Owner is ToolStripDropDown parentDropDown)
{
ToolStripItem ownerItem = parentDropDown.OwnerItem;
if (designerHost.GetDesigner(ownerItem) is ToolStripItemDesigner ownerItemDesigner)
{
dragBox = ownerItemDesigner.dragBoxFromMouseDown;
}
}
}
// If the mouse moves outside the rectangle, start the drag.
if (dragBox != Rectangle.Empty && !dragBox.Contains(mouseLoc.X, mouseLoc.Y))
{
if (_timer != null)
{
_timer.Enabled = false;
_timer.Tick -= new System.EventHandler(OnDoubleClickTimerTick);
_timer.Dispose();
_timer = null;
}
// Proceed with the drag and drop, passing in the list item.
try
{
ArrayList dragItems = new ArrayList();
ICollection selComps = selSvc.GetSelectedComponents();
//create our list of controls-to-drag
foreach (IComponent comp in selComps)
{
if (comp is ToolStripItem item)
{
dragItems.Add(item);
}
}
//Start Drag-Drop only if ToolStripItem is the primary Selection
if (selSvc.PrimarySelection is ToolStripItem selectedItem)
{
ToolStrip owner = selectedItem.Owner;
ToolStripItemDataObject data = new ToolStripItemDataObject(dragItems, selectedItem, owner);
DropSource.QueryContinueDrag += new QueryContinueDragEventHandler(QueryContinueDrag);
if (glyphItem is ToolStripDropDownItem ddItem)
{
if (designerHost.GetDesigner(ddItem) is ToolStripMenuItemDesigner itemDesigner)
{
itemDesigner.InitializeBodyGlyphsForItems(false, ddItem);
ddItem.HideDropDown();
}
}
else if (glyphItem.IsOnDropDown && !glyphItem.IsOnOverflow)
{
ToolStripDropDown dropDown = glyphItem.GetCurrentParent() as ToolStripDropDown;
ToolStripDropDownItem ownerItem = dropDown.OwnerItem as ToolStripDropDownItem;
selSvc.SetSelectedComponents(new IComponent[] { ownerItem }, SelectionTypes.Replace);
}
DropSource.DoDragDrop(data, DragDropEffects.All);
}
}
finally
{
DropSource.QueryContinueDrag -= new QueryContinueDragEventHandler(QueryContinueDrag);
//Reset all Drag-Variables
SetParentDesignerValuesForDragDrop(glyphItem, false, Point.Empty);
ToolStripDesigner.s_dragItem = null;
_dropSource = null;
}
retVal = false;
}
}
return(retVal);
}