protected override bool OnMotionNotifyEvent(EventMotion evnt)
{
string newTooltip = null;
if (!draggingTab)
{
var t = FindTab((int)evnt.X, (int)evnt.Y);
// If the user clicks and drags on the 'x' which closes the current
// tab we can end up with a null tab here
if (t == null)
{
return(base.OnMotionNotifyEvent(evnt));
}
;
SetHighlightedTab(t);
var newOver = IsOverCloseButton(t, (int)evnt.X, (int)evnt.Y);
if (newOver != overCloseButton)
{
overCloseButton = newOver;
QueueDraw();
}
if (!overCloseButton && !draggingTab && buttonPressedOnTab)
{
draggingTab = true;
dragXProgress = 1.0f;
int x = (int)evnt.X;
dragOffset = x - t.Allocation.X;
dragX = x - dragOffset;
lastDragX = (int)evnt.X;
}
else if (t != null)
{
newTooltip = t.Tooltip;
}
}
else if (evnt.State.HasFlag(ModifierType.Button1Mask))
{
dragX = (int)evnt.X - dragOffset;
QueueDraw();
var t = FindTab((int)evnt.X, TopPadding + 3);
if (t == null)
{
var last = (DockNotebookTab)notebook.Tabs.Last();
if (dragX > last.Allocation.Right)
{
t = last;
}
if (dragX < 0)
{
t = (DockNotebookTab)notebook.Tabs.First();
}
}
if (t != null && t != notebook.CurrentTab && (
((int)evnt.X > lastDragX && t.Index > notebook.CurrentTab.Index) ||
((int)evnt.X < lastDragX && t.Index < notebook.CurrentTab.Index)))
{
t.SaveAllocation();
t.SaveStrength = 1;
notebook.ReorderTab((DockNotebookTab)notebook.CurrentTab, t);
t.Animate("TabMotion",
f => t.SaveStrength = f,
start: 1.0f,
end: 0.0f,
easing: Easing.CubicInOut);
}
lastDragX = (int)evnt.X;
}
if (newTooltip != null && TooltipText != null && TooltipText != newTooltip)
{
TooltipText = null;
}
else
{
TooltipText = newTooltip;
}
return(base.OnMotionNotifyEvent(evnt));
}
