/// <summary>
/// Pass mouse up to appropriate item
/// </summary>
/// <param name="e"></param>
public override bool OnMouseUp(VCItem sender, ItemMouseEventArgs e)
{
var pt = e.Location;
if (mouseDownPlacement != null)
{
try
{
var localPt = mouseDownPlacement.ToLocal(pt);
return(mouseDownPlacement.Item.OnMouseUp(new ItemMouseEventArgs(e, localPt.X, localPt.Y)));
}
finally
{
mouseDownPlacement = null;
}
}
else
{
VCItemPlacement placement = null;
while ((placement = container.Items.Find(pt, placement)) != null)
{
var localPt = placement.ToLocal(pt);
if (placement.Item.OnMouseUp(new ItemMouseEventArgs(e, localPt.X, localPt.Y)))
{
return(true);
}
}
return(base.OnMouseUp(sender, e));
}
}
/// <summary>
/// Pass mouse move to appropriate item
/// </summary>
/// <param name="e"></param>
public override bool OnMouseMove(VCItem sender, ItemMouseEventArgs e)
{
var pt = e.Location;
if (mouseDownPlacement != null)
{
// Mouse button down, always send events to same placement
var localPt = mouseDownPlacement.ToLocal(pt);
return(mouseDownPlacement.Item.OnMouseMove(new ItemMouseEventArgs(e, localPt.X, localPt.Y)));
}
else
{
VCItemPlacement placement = container.Items.Find(pt, null);
// Handle mouse leave
if ((mouseOverPlacement != null) && (mouseOverPlacement != placement))
{
mouseOverPlacement.Item.OnMouseLeave(EventArgs.Empty);
mouseOverPlacement = null;
}
while (placement != null)
{
// Convert point to local
var localPt = placement.ToLocal(pt);
// Handle mouse enter
if (mouseOverPlacement == null)
{
mouseOverPlacement = placement;
mouseOverPlacement.Item.OnMouseEnter(EventArgs.Empty);
}
// Send mouse move
mouseOverPlacement = placement;
if (placement.Item.OnMouseMove(new ItemMouseEventArgs(e, localPt.X, localPt.Y)))
{
return(true);
}
placement = container.Items.Find(pt, placement);
if ((placement != mouseOverPlacement) && (placement != null))
{
mouseOverPlacement.Item.OnMouseLeave(EventArgs.Empty);
mouseOverPlacement = null;
}
}
return(base.OnMouseMove(sender, e));
}
}
/// <summary>
/// Occurs when a drag-and-drop operation is completed.
/// </summary>
/// <param name="e"></param>
public override bool OnDragDrop(VCItem sender, ItemDragEventArgs e)
{
var pt = new Point(e.X, e.Y);
VCItemPlacement placement = null;
while ((placement = container.Items.Find(pt, placement)) != null)
{
Point localPt = placement.ToLocal(pt);
if (placement.Item.OnDragDrop(new ItemDragEventArgs(e, localPt.X, localPt.Y)))
{
return(true);
}
}
return(base.OnDragDrop(sender, e));
}
/// <summary>
/// Pass mouse double click to appropriate item
/// </summary>
/// <param name="e"></param>
public override bool OnMouseDoubleClick(VCItem sender, ItemMouseEventArgs e)
{
var pt = e.Location;
VCItemPlacement placement = null;
while ((placement = container.Items.Find(pt, placement)) != null)
{
var localPt = placement.ToLocal(pt);
if (placement.Item.OnMouseDoubleClick(new ItemMouseEventArgs(e, localPt.X, localPt.Y)))
{
return(true);
}
}
return(base.OnMouseDoubleClick(sender, e));
}
/// <summary>
/// Occurs when an object is dragged over the item's bounds.
/// </summary>
/// <param name="e"></param>
public override bool OnDragOver(VCItem sender, ItemDragEventArgs e)
{
var pt = new Point(e.X, e.Y);
VCItemPlacement placement = container.Items.Find(pt, null);
// Handle drag leave
if ((dragOverPlacement != null) && (dragOverPlacement != placement))
{
dragOverPlacement.Item.OnDragLeave(EventArgs.Empty);
dragOverPlacement = null;
}
while (placement != null)
{
// Convert point to local
Point localPt = placement.ToLocal(pt);
// Handle drag enter
if (dragOverPlacement == null)
{
dragOverPlacement = placement;
dragOverPlacement.Item.OnDragEnter(EventArgs.Empty);
}
// Send drag over
dragOverPlacement = placement;
if (placement.Item.OnDragOver(new ItemDragEventArgs(e, localPt.X, localPt.Y)))
{
return(true);
}
placement = container.Items.Find(pt, placement);
if ((placement != dragOverPlacement) && (placement != null))
{
dragOverPlacement.Item.OnDragLeave(EventArgs.Empty);
dragOverPlacement = null;
}
}
return(base.OnDragOver(sender, e));
}