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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/IterationDecision.h>
#include <LibGUI/AbstractView.h>
#include <LibGUI/Forward.h>
#include <LibGUI/Variant.h>
namespace GUI {
class IconView : public AbstractView {
C_OBJECT(IconView)
public:
virtual ~IconView() override;
enum class FlowDirection {
LeftToRight,
TopToBottom,
};
FlowDirection flow_direction() const { return m_flow_direction; }
void set_flow_direction(FlowDirection);
int horizontal_padding() const { return m_horizontal_padding; }
virtual void scroll_into_view(const ModelIndex&, bool scroll_horizontally = true, bool scroll_vertically = true) override;
Gfx::IntSize effective_item_size() const { return m_effective_item_size; }
bool always_wrap_item_labels() const { return m_always_wrap_item_labels; }
void set_always_wrap_item_labels(bool value) { m_always_wrap_item_labels = value; }
int model_column() const { return m_model_column; }
void set_model_column(int column) { m_model_column = column; }
virtual ModelIndex index_at_event_position(const Gfx::IntPoint&) const override;
virtual Gfx::IntRect content_rect(const ModelIndex&) const override;
virtual Gfx::IntRect editing_rect(ModelIndex const&) const override;
virtual Gfx::IntRect paint_invalidation_rect(ModelIndex const&) const override;
virtual void select_all() override;
private:
IconView();
virtual void model_did_update(unsigned flags) override;
virtual void paint_event(PaintEvent&) override;
virtual void second_paint_event(PaintEvent&) override;
virtual void resize_event(ResizeEvent&) override;
virtual void mousedown_event(MouseEvent&) override;
virtual void mousemove_event(MouseEvent&) override;
virtual void mouseup_event(MouseEvent&) override;
virtual void did_change_hovered_index(const ModelIndex& old_index, const ModelIndex& new_index) override;
virtual void did_change_cursor_index(const ModelIndex& old_index, const ModelIndex& new_index) override;
virtual void move_cursor(CursorMovement, SelectionUpdate) override;
struct ItemData {
Gfx::IntRect text_rect;
Optional<Gfx::IntRect> text_rect_wrapped;
Gfx::IntRect icon_rect;
int icon_offset_y;
int text_offset_y;
String text;
Vector<StringView> wrapped_text_lines;
ModelIndex index;
bool valid { false };
bool selected { false }; // always valid
bool selection_toggled; // only used as a temporary marker
bool is_valid() const { return valid; }
void invalidate()
{
valid = false;
text = {};
}
Gfx::IntRect hot_icon_rect() const { return icon_rect.inflated(10, 10); }
Gfx::IntRect hot_text_rect() const { return text_rect.inflated(2, 2); }
bool is_intersecting(const Gfx::IntRect& rect) const
{
VERIFY(valid);
return hot_icon_rect().intersects(rect) || hot_text_rect().intersects(rect);
}
bool is_containing(const Gfx::IntPoint& point) const
{
VERIFY(valid);
return hot_icon_rect().contains(point) || hot_text_rect().contains(point);
}
Gfx::IntRect rect(bool wrapped = false) const
{
if (wrapped && text_rect_wrapped.has_value())
return text_rect_wrapped->united(icon_rect);
return text_rect.united(icon_rect);
}
};
template<typename Function>
IterationDecision for_each_item_intersecting_rect(const Gfx::IntRect&, Function) const;
template<typename Function>
IterationDecision for_each_item_intersecting_rects(const Vector<Gfx::IntRect>&, Function) const;
void column_row_from_content_position(const Gfx::IntPoint& content_position, int& row, int& column) const
{
row = max(0, min(m_visual_row_count - 1, content_position.y() / effective_item_size().height()));
column = max(0, min(m_visual_column_count - 1, content_position.x() / effective_item_size().width()));
}
int item_count() const;
Gfx::IntRect item_rect(int item_index) const;
void update_content_size();
void update_item_rects(int item_index, ItemData& item_data) const;
void get_item_rects(int item_index, ItemData& item_data, const Gfx::Font&) const;
bool update_rubber_banding(const Gfx::IntPoint&);
void scroll_out_of_view_timer_fired();
int items_per_page() const;
void rebuild_item_cache() const;
int model_index_to_item_index(const ModelIndex& model_index) const
{
VERIFY(model_index.row() < item_count());
return model_index.row();
}
virtual void did_update_selection() override;
virtual void clear_selection() override;
virtual void add_selection(const ModelIndex& new_index) override;
virtual void set_selection(const ModelIndex& new_index) override;
virtual void toggle_selection(const ModelIndex& new_index) override;
ItemData& get_item_data(int) const;
ItemData* item_data_from_content_position(const Gfx::IntPoint&) const;
void do_clear_selection();
bool do_add_selection(ItemData&);
void add_selection(ItemData&);
void remove_selection(ItemData&);
void toggle_selection(ItemData&);
int m_horizontal_padding { 5 };
int m_model_column { 0 };
int m_visual_column_count { 0 };
int m_visual_row_count { 0 };
Gfx::IntSize m_effective_item_size { 80, 80 };
bool m_always_wrap_item_labels { false };
bool m_rubber_banding { 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;
FlowDirection m_flow_direction { FlowDirection::LeftToRight };
mutable Vector<ItemData> m_item_data_cache;
mutable int m_selected_count_cache { 0 };
mutable int m_first_selected_hint { 0 };
mutable bool m_item_data_cache_valid { false };
bool m_changing_selection { false };
bool m_had_valid_size { false };
};
}
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