可以通过GTK发布gtk_menu_popup重点显示菜单？ [英] Can gtk menus displayed via gtk_menu_popup release focus?

问题描述

我重构一些code，通常需要用户点击一个按钮，弹出菜单出现（它出现在按钮旁），我想要做的是显示弹出菜单，如果用户把鼠标停留在为preSET时间按钮图标，如果用户移动到另一个按钮图标再次隐藏它。

I'm refactoring some code that normally requires the user to click a button for a popup menu to appear (it appears beside the button), what I'm trying to do is show the popup menu if the user hovers the mouse over the button icon for a preset duration and hide it again if the user moves onto another button icon.

然而，通过 gtk_menu_popup 激活菜单抢断鼠标和键盘焦点，我已经没有什么进展试图抓住重点，为按钮组件。

However, activating the menu via gtk_menu_popup steals mouse and keyboard focus, I have made little progress trying to grab focus for the button widget.

是否有可能焦点返回到该按钮图标？

Is it possible to return focus to the button icon?

推荐答案

调试这被证明是相当麻烦，为 gtk_menu_popup 抓住GDK键盘和指针的焦点，这从通过code使用gdb步进prevents之一，我最终通过运行在一个虚拟的code和使用用gdb通过SSH远程调试会话管理它。

Debugging this turned out to be quite troublesome, as gtk_menu_popup grabs the gdk keyboard and pointer focus, which prevents one from stepping through the code with gdb, I eventually managed it by running the code in a VM and using a remote debugging session with gdb over SSH.

有通过该弹出可以从原始小窗口

There are a few different mechanisms through which the popup may steal focus from the original widget

1. 经短暂窗口的关系（只有在你通过 parent_menu_shell ）


2. 通过 gdk_pointer_grab


3. 通过 gtk_grab_add

1. Via transient window relationships (only if you pass parent_menu_shell)
2. Via gdk_pointer_grab
3. Via gtk_grab_add

由于我设置了 parent_menu_shell 外壳参数设置为NULL，这意味着我不得不撤消最后两个'抓住'，像这样：

As I set the parent_menu_shell shell parameter to NULL, this meant that I had to undo the last two 'grabs', like so:

gdk_pointer_ungrab(GDK_CURRENT_TIME);
gdk_keyboard_ungrab(GDK_CURRENT_TIME);
gtk_grab_remove(menu);

这奏效了，但焦点被暂时被弹出，这会导致问题太被盗

This did the trick but focus gets temporarily stolen by the popup, which causes problems too

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