private void dropContainer_Closed(object sender, FormClosedEventArgs e)
{
if (!this.dropContainer.IsDisposed)
{
this.dropContainer.DropStateChange -= this.dropContainer_DropStateChange;
this.dropContainer.FormClosed -= this.dropContainer_Closed;
this.ParentForm.Move -= this.ParentForm_Move;
this.dropContainer.Dispose();
}
this.dropContainer = null;
this.closedWhileInControl = (this.RectangleToScreen(this.ClientRectangle).Contains(Cursor.Position));
this.dropState = DropState.Closed;
this.Invalidate();
}
protected void OpenDropDown()
{
if (this.dropDownItem == null)
{
throw new NotImplementedException("The drop down item has not been initialized! Use the InitializeDropDown() method to do so.");
}
if (!this.CanDrop)
{
return;
}
this.dropContainer = new DropDownContainer(this.dropDownItem);
this.dropContainer.Bounds = this.GetDropDownBounds();
this.dropContainer.DropStateChange += new DropDownContainer.DropWindowArgs(this.dropContainer_DropStateChange);
this.dropContainer.FormClosed += new FormClosedEventHandler(this.dropContainer_Closed);
this.ParentForm.Move += new EventHandler(this.ParentForm_Move);
this.dropState = DropState.Dropping;
this.dropContainer.Show(this);
this.dropState = DropState.Dropped;
this.Invalidate();
}
