internal bool HandleDragOver(CGPoint viewPoint)
{
if (activeGlyphDropHandler == null)
{
return(false); // not dragging
}
if (!dragOccurred)
{
// if the mouse moved position is less than the system settings for drag start, don't start the
// drag operation
Vector dragDelta = new Vector(clickLocation.X - viewPoint.X, clickLocation.Y - viewPoint.Y);
if (Math.Abs(dragDelta.X) < SystemParameters.MinimumHorizontalDragDistance && Math.Abs(dragDelta.Y) < SystemParameters.MinimumVerticalDragDistance)
{
return(false);
}
// Now that the mouse has moved, this is an actual drag.
dragOccurred = true;
}
var(line, column) = GetLineNumberAndColumn(viewPoint);
// If this line isn't in the data (surface) buffer, we can't use it
if (line < 0)
{
return(false);
}
// Query if we can drop here and set mouse cursor appropriately.
if (activeGlyphDropHandler.CanDrop(line, column))
{
// We can drop here. Use "hand" cursor.
//TODO:MAC
//Mouse.OverrideCursor = Cursors.Hand;
}
else
{
// Can't drop here; change mouse cursor.
//TODO:MAC
//Mouse.OverrideCursor = Cursors.No;
}
// if the view does not have any focus, grab it
if (!textViewHost.TextView.HasAggregateFocus)
{
var viewToFocus = textViewHost.TextView.VisualElement;
viewToFocus.Window.MakeFirstResponder(viewToFocus);
}
// Position the drag/drop caret and ensure it's visible.
ITextViewLine textViewLine = GetTextViewLine(viewPoint.Y);
viewPrimitives.Caret.AdvancedCaret.MoveTo(textViewLine, viewPoint.X);
this.EnsureCaretVisibleWithPadding();
return(true);
}
internal bool HandleDragEnd(CGPoint viewPoint)
{
// Clean up our dragging state.
//glyphMargin.VisualElement.ReleaseMouseCapture();
//Mouse.OverrideCursor = null;
IActiveGlyphDropHandler glyphDropHandler = activeGlyphDropHandler;
activeGlyphDropHandler = null;
// Did we actually do a drag?
if (!dragOccurred)
{
return(false);
}
dragOccurred = false;
if (glyphDropHandler != null)
{
var(line, column) = GetLineNumberAndColumn(viewPoint);
// If this line isn't in the data (surface) buffer, we can't use it
if (line < 0)
{
return(false);
}
// Query if we can drop here.
if (glyphDropHandler.CanDrop(line, column))
{
glyphDropHandler.DropAtLocation(line, column);
}
}
// Even if we couldn't drop here, we return true to ensure that we don't handle this as a normal click.
return(true);
}
