创建可以超越窗口区域的弹出窗口 [英] Create popover that can overpass window area
问题描述
有一个小窗口应用程序(50x50px)，其中只有一个图像.当您单击图像时，会出现一个popover(GtkPopover)，但它不能越过窗口边界，只显示一部分.
There is a small window application (50x50px) with only one image inside of it. When you click the image, a popover(GtkPopover) appears, but it cannot overpass the window borders and only part of it is shown.
如何在不调整窗口大小的情况下解决此问题?
How could I solve this issue without resizing the window?
推荐答案
X11下GTK中的Popovers不能扩展到它们所属的顶级窗口之外，因为它们没有使用单独的窗口系统表面；如果它们确实像菜单一样，即使在其外部单击也将无法保持打开状态.
Popovers in GTK under X11 cannot extend outside of the top-level window they belong to, because they do not use a separate windowing system surface; if they did, like menus, they would not be able to remain open even when clicking outside of them.
无法在GTK3中解决此问题，请参阅:
This cannot be fixed in GTK3, see:
您必须使用Wayland，或者必须确保窗口足够大以显示弹出窗口.
You must use Wayland, or you must ensure that your window is big enough to display your popover.
您可能还想使用 gtk_popover_set_position() ，
You also probably want to use gtk_popover_set_position(), gtk_popover_set_pointing_to(), or gtk_popover_set_constrain_to() to ensure that your popover always opens within the window surface, instead of outside.
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