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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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3
Libraries/LibGUI/Widget.h
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@ -165,6 +165,9 @@ public:
bool is_focused() const;
void set_focus(bool, FocusSource = FocusSource::Programmatic);
// Returns true if this widget or one of its descendants is focused.
bool has_focus_within() const;
Widget* focus_proxy() { return m_focus_proxy; }
const Widget* focus_proxy() const { return m_focus_proxy; }
void set_focus_proxy(Widget*);