///<summary>
///Called when a drag-and-drop operation enters the control designer view.
///</summary>
///
///<param name="de">A <see cref="T:System.Windows.Forms.DragEventArgs"></see> that provides data for the event. </param>
protected override void OnDragEnter(DragEventArgs de)
{
WizardControl control = (WizardControl)Control;
if (control.WizardSteps.Count <= 0)
{
base.OnDragEnter(de);
return;
}
WizardStep step = control.WizardSteps[control.CurrentStepIndex];
Point pt = step.PointToClient(new Point(de.X, de.Y));
Rectangle clientRectangle = step.ClientRectangle;
if (!clientRectangle.Contains(pt))
{
base.OnDragEnter(de);
return;
}
GetWizardStepDesigner(step).OnDragEnterInternal(de);
forwardOnDrag = true;
}
///<summary>
///Called when a drag-and-drop object is dragged over the control designer view.
///</summary>
///
///<param name="de">A <see cref="T:System.Windows.Forms.DragEventArgs"></see> that provides data for the event. </param>
protected override void OnDragOver(DragEventArgs de)
{
WizardControl control = Control as WizardControl;
if (control == null || control.WizardSteps.Count <= 0)
{
de.Effect = DragDropEffects.None;
return;
}
WizardStep step = control.WizardSteps[control.CurrentStepIndex];
Point pt = step.PointToClient(new Point(de.X, de.Y));
WizardStepDesigner wizardStepDesigner = GetWizardStepDesigner(step);
Rectangle clientRectangle = step.ClientRectangle;
if (!clientRectangle.Contains(pt))
{
if (!forwardOnDrag)
{
de.Effect = DragDropEffects.None;
return;
}
forwardOnDrag = false;
wizardStepDesigner.OnDragLeaveInternal(EventArgs.Empty);
base.OnDragEnter(de);
return;
}
else
{
if (!forwardOnDrag)
{
base.OnDragLeave(EventArgs.Empty);
wizardStepDesigner.OnDragEnterInternal(de);
forwardOnDrag = true;
return;
}
wizardStepDesigner.OnDragOverInternal(de);
return;
}
}