问题描述
我已经创建了具有标签式组的MDI应用程序..
I have created a MDI application with tabbed group.
每次我从选项卡栏拖放一个选项卡进行查看时，都会创建一个新的选项卡组并根据选项卡组的数量划分视图.但是我想允许我的应用程序仅创建两个选项卡组.
Each time I drag and drop one tab from tab bar to view, it will create a new tab group and divide view according to the number of tab groups. But I want to allow my application to create only two tab groups.
我已经完成工作，将一个新的标签组与与拖放标签相关的标签组重新分组.
I have done my work by regrouping a new tab group with the tab group related to the drag-and-drop tab.
但是此解决方案不好，因为视图会短暂闪烁.
But this solution is not good because the view blinks for a short time.
我正在寻找更好的解决方案.我知道:拖放选项卡以查看=>创建新选项卡组是MDI选项卡组的默认支持.
I'm looking for a better solution. I know: drag-and-drop tab to view => create new tab group is default support by MDI Tabbed Group.
如何检查并防止它?
推荐答案
根据消息AFX_WM_ON_MOVETABCOMPLETE(已注册的Windows消息)完成分离和移动Tabs区域的完整工作，此消息由CMDIClientAreaWnd :: OnMoveTabComplete处理.
The complete job of detaching and moving the Tabs arround is done upon the message AFX_WM_ON_MOVETABCOMPLETE (registered Windows message), this message is handled by CMDIClientAreaWnd::OnMoveTabComplete.
因此，您可以继承MDI客户端窗口的类，并可以截取消息.检查所需的内容，如果不想执行拖放操作，则只需返回即可.
So you can subclass your MDI client window and you can intercept the message.Check what you want, and if you don't want to allow the drag&drop Operation just return.
如果要允许此拖放操作，只需调用基本实现CMDIClientAreaWnd :: OnMoveTabComplete.
If you want to allow this drag&drop just call the base implementation CMDIClientAreaWnd::OnMoveTabComplete.
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