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LibGUI: Add Widget::has_focus_within()

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This returns true if the widget has focus, or if one of its descendant
widgets does. Use this in StackWidget and TabWidget.

This also fixes HackStudio crashing on startup in StackWidget, due to
running before the window has a focused widget.
This commit is contained in:
Andreas Kling 2020-10-30 23:38:42 +01:00
parent dee639f19b
commit b11b4b29e9
4 changed files with 18 additions and 2 deletions
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2
Libraries/LibGUI/StackWidget.cpp
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@ -43,7 +43,7 @@ void StackWidget::set_active_widget(Widget* widget)
if (widget == m_active_widget)
return;
bool active_widget_had_focus = m_active_widget && window() && (window()->focused_widget() == m_active_widget || m_active_widget->is_ancestor_of(*window()->focused_widget()));
bool active_widget_had_focus = m_active_widget && m_active_widget->has_focus_within();
if (m_active_widget)
m_active_widget->set_visible(false);