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Code Issues Activity Actions

LibGUI: Implement IconView auto-scrolling when trying to select items out of view

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If selecting in a large icon view, and dragging the mouse outside
of the widget, or close to the border of it, start scrolling
automatically. This allows for selecting large amount of items
that exceed the amount that can be displayed.
This commit is contained in:
Tom 2020-07-08 11:42:32 -06:00 • committed by Andreas Kling
parent d10765bec3
commit d4b87fb18e
2 changed files with 77 additions and 22 deletions
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6
Libraries/LibGUI/IconView.h
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@ -46,7 +46,6 @@ public:
void set_model_column(int column) { m_model_column = column; }
virtual ModelIndex index_at_event_position(const Gfx::IntPoint&) const override;
Gfx::IntPoint adjusted_position(const Gfx::IntPoint&) const;
virtual void select_all() override;
private:
@ -67,6 +66,8 @@ private:
Vector<int> items_intersecting_rect(const Gfx::IntRect&) const;
void update_content_size();
void get_item_rects(int item_index, const Gfx::Font&, const Variant& item_text, Gfx::IntRect& item_rect, Gfx::IntRect& icon_rect, Gfx::IntRect& text_rect) const;
bool update_rubber_banding(const Gfx::IntPoint&);
void scroll_out_of_view_timer_fired();
int m_horizontal_padding { 5 };
int m_model_column { 0 };
@ -76,6 +77,9 @@ private:
Gfx::IntSize m_effective_item_size { 80, 80 };
bool m_rubber_banding { false };
bool m_rubber_banding_store_selection { false };
RefPtr<Core::Timer> m_out_of_view_timer;
Gfx::IntPoint m_out_of_view_position;
Gfx::IntPoint m_rubber_band_origin;
Gfx::IntPoint m_rubber_band_current;
Vector<ModelIndex> m_rubber_band_remembered_selection;