// Internal for unit testing.
internal void HandleDragStart(CGPoint viewPoint)
{
Debug.Assert(activeGlyphDropHandler == null);
activeGlyphDropHandler = null;
// Get the ITextViewLine corresponding to the click point.
ITextViewLine textLine = GetTextViewLine(viewPoint.Y);
if (textLine == null)
{
return;
}
// Is there a draggable glyph here?
IActiveGlyphDropHandler draggableTextMarkerGlyphTag = null;
foreach (IInteractiveGlyph textMarkerGlyphTag in GetTextMarkerGlyphTagsStartingOnLine(textLine))
{
if (textMarkerGlyphTag.DropHandler != null)
{
draggableTextMarkerGlyphTag = textMarkerGlyphTag.DropHandler;
break;
}
}
if (draggableTextMarkerGlyphTag == null)
{
return;
}
// We have a draggable glyph. Start dragging it!
// Store the handler for the glyph being dragged.
activeGlyphDropHandler = draggableTextMarkerGlyphTag;
HideTooltip();
dragOccurred = false;
// Capture mouse events so we catch mouse moves over the entire screen and the mouse up event.
// Note: This may trigger an immediate OnMouseMove event, so make sure we do it last.
//glyphMargin.VisualElement.CaptureMouse();
}
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);
}
