如何使我的自定义树视图接受Enter键？ [英] How do I make my custom treeview accept the Enter key?

问题描述

我有一个自定义控件，它来自TTreeView。我试图通过给它一个响应VK_RETURN的WM_CHAR处理程序，使用户在控件处于焦点状态时按ENTER来赋予它特殊的行为。

I've got a custom control that descends from TTreeView. I'm trying to give it special behavior when the user presses ENTER while the control is focused, by giving it a WM_CHAR handler that responds to VK_RETURN, but it never gets called.

我尝试通过添加一个表示 msg.Result：= msg.Result或DLGC_WANTALLKEYS; 的WM_GETDLGCODE处理程序来确保它接受所有键盘输入。现在它收到了ENTER键，但箭头键不再起作用！

I tried making sure that it would accept all keyboard input by adding a WM_GETDLGCODE handler that says msg.Result := msg.Result or DLGC_WANTALLKEYS;. Now it receives the ENTER key, but the arrow keys no longer work!

任何人都知道如何正确解决此问题吗？

Anyone have any idea how I can fix this correctly?

推荐答案

我总是这样做

WM_GETDLGCODE: Message.Result := Message.Result or DLGC_WANTCHARS or
                                 DLGC_WANTARROWS or DLGC_WANTTAB or
                                 DLGC_WANTALLKEYS;

。也许您只是忘记了 DLGC_WANTARROWS ？

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