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SpaceAnalyzer: Fix the crash caused by using arrow keys
Previously, SpaceAnalyzer set focus on the selected BreadcrumbButton. Using arrow keys triggered the keydown_event of the AbstractButton, which later on caused a Function object to be deleted while it is still being used. This change sets the focus on TreeMapWidget and adds an event handler to TreeMapWidget for keydown events. Fixes #13254.
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@ -320,6 +320,8 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
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auto& treemapwidget = *mainwidget.find_descendant_of_type_named<SpaceAnalyzer::TreeMapWidget>("tree_map");
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auto& statusbar = *mainwidget.find_descendant_of_type_named<GUI::Statusbar>("statusbar");
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treemapwidget.set_focus(true);
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auto& file_menu = window->add_menu("&File");
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file_menu.add_action(GUI::Action::create("&Analyze", [&](auto&) {
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analyze(tree, treemapwidget, statusbar);
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