public void BeginDrag(IDockDragSource dragSource)
{
DragSource = dragSource;
if (!BeginDrag())
{
DragSource = null;
return;
}
Outline = new DockOutline();
Indicator = new DockIndicator(this);
Indicator.Show(false);
FloatOutlineBounds = DragSource.BeginDrag(StartMousePosition);
}
internal void TestDrop(IDockDragSource dragSource, DockOutlineBase dockOutline)
{
if (VisibleNestedPanes.Count == 1)
{
var pane = VisibleNestedPanes[0];
if (!dragSource.CanDockTo(pane))
return;
var ptMouse = MousePosition;
var lParam = Win32Helper.MakeLong(ptMouse.X, ptMouse.Y);
if (NativeMethods.SendMessage(Handle, (int)Msgs.WM_NCHITTEST, 0, lParam) == (uint)HitTest.HTCAPTION)
dockOutline.Show(VisibleNestedPanes[0], -1);
}
}
internal void TestDrop(IDockDragSource dragSource, DockOutlineBase dockOutline)
{
if (!dragSource.CanDockTo(this))
return;
var ptMouse = MousePosition;
var hitTestResult = GetHitTest(ptMouse);
if (hitTestResult.HitArea == HitTestArea.Caption)
dockOutline.Show(this, -1);
else if (hitTestResult.HitArea == HitTestArea.TabStrip && hitTestResult.Index != -1)
dockOutline.Show(this, hitTestResult.Index);
}