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LibGUI: Implement automatic scrolling in AbstractView

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This adds automatic scrolling when dragging items in TreeViews and other
widgets that inherit from AbstractView when the overloaded
accepts_drag() returns true. This is implemented in FileSystemModel to
allow directories and files to be dragged.
This commit is contained in:
Marcus Nilsson 2021-09-19 21:31:19 +02:00 • committed by Andreas Kling
parent 53cfc6ec9f
commit d660e86d13
6 changed files with 45 additions and 7 deletions
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4
Userland/Libraries/LibGUI/AbstractView.h
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@ -142,6 +142,8 @@ protected:
virtual void hide_event(HideEvent&) override;
virtual void focusin_event(FocusEvent&) override;
virtual void on_automatic_scrolling_timer_fired() override;
virtual void clear_selection();
virtual void set_selection(ModelIndex const&);
virtual void set_selection_start_index(ModelIndex const&);
@ -202,6 +204,8 @@ private:
bool m_is_dragging { false };
bool m_draw_item_text_with_shadow { false };
bool m_suppress_update_on_selection_change { false };
Gfx::IntPoint m_automatic_scroll_delta {};
};
}