Yeti, Thank you. The purpose is when the focus is moved out of the container, I'll destroy the container and its child widgets. How can I achieve this?
Thanks, Gang 2014-07-16 15:18 GMT+08:00 David Nečas <y...@physics.muni.cz>: > On Wed, Jul 16, 2014 at 11:49:52AM +0800, Gang Chen wrote: > > A grid contains an entry and several buttons. I connected my callback > > function to "focus-out-event" of the grid. But no focus-out-event was > > received even if I called gtk_widget_add_events(grid, > > GDK_FOCUS_CHANGE_MASK). I tried to put the grid in an event box and > > connected the callback to "focus-out-event" of the event box. Still no > > focus-out-event was received. Could anybody please help me? > > "focus-out-event" is emitted when a widget that can take keyboard focus > loses the focus. It makes no sense for containers to have keyboard focus > because they do not take input from keyboard. A particular input widget > inside the container should have the focus. > > You can make an event box to take keyboard focus using > gtk_widget_set_can_focus() but this is useless. It will prevent the > user from tabbing to the child widgets of the event box. Instead he > will be able to tab to the event box which will look to him like > mysteriously losing focus because the event box is not an input widget. > > So just connect to signals of the actual input widgets. > > Yeti > >
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