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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibGUI/Margins.h>
#include <LibGUI/Widget.h>
namespace GUI {
class TabWidget : public Widget {
C_OBJECT(TabWidget)
public:
enum TabPosition {
Top,
Bottom,
Left,
Right,
};
virtual ~TabWidget() override = default;
TabPosition tab_position() const { return m_tab_position; }
void set_tab_position(TabPosition);
bool has_vertical_tabs() const { return m_tab_position == TabPosition::Left || m_tab_position == TabPosition::Right; }
Optional<size_t> active_tab_index() const;
size_t tab_count() { return m_tabs.size(); }
Widget* active_widget() { return m_active_widget.ptr(); }
Widget const* active_widget() const { return m_active_widget.ptr(); }
void set_active_widget(Widget*);
void set_tab_index(int);
int bar_height() const { return m_bar_visible ? 22 : 0; }
int get_max_tab_width() const { return m_bar_visible ? m_max_tab_width : 0; }
void set_max_tab_width(int width) { m_max_tab_width = width; }
int get_min_tab_width() const { return m_min_tab_width; }
void set_min_tab_width(int width) { m_min_tab_width = width; }
GUI::Margins const& container_margins() const { return m_container_margins; }
void set_container_margins(GUI::Margins const&);
Optional<UISize> calculated_min_size() const override;
Optional<UISize> calculated_preferred_size() const override;
ErrorOr<void> try_add_widget(Widget&);
void add_widget(Widget&);
void remove_widget(Widget&);
template<class T, class... Args>
ErrorOr<NonnullRefPtr<T>> try_add_tab(String title, Args&&... args)
{
auto t = TRY(T::try_create(forward<Args>(args)...));
t->set_title(move(title));
TRY(try_add_widget(*t));
return *t;
}
template<class T, class... Args>
T& add_tab(String title, Args&&... args)
{
auto t = T::construct(forward<Args>(args)...);
t->set_title(move(title));
add_widget(*t);
return *t;
}
void remove_tab(Widget& tab) { remove_widget(tab); }
void remove_all_tabs_except(Widget& tab);
void set_tab_title(Widget& tab, StringView title);
void set_tab_icon(Widget& tab, Gfx::Bitmap const*);
void activate_next_tab();
void activate_previous_tab();
void activate_last_tab();
void set_text_alignment(Gfx::TextAlignment alignment) { m_text_alignment = alignment; }
Gfx::TextAlignment text_alignment() const { return m_text_alignment; }
bool uniform_tabs() const { return m_uniform_tabs; }
void set_uniform_tabs(bool uniform_tabs) { m_uniform_tabs = uniform_tabs; }
int uniform_tab_width() const;
void set_bar_visible(bool bar_visible);
bool is_bar_visible() const { return m_bar_visible; };
void set_close_button_enabled(bool close_button_enabled) { m_close_button_enabled = close_button_enabled; };
bool close_button_enabled() const { return m_close_button_enabled; }
void set_reorder_allowed(bool reorder_allowed) { m_reorder_allowed = reorder_allowed; }
bool reorder_allowed() const { return m_reorder_allowed; }
Function<void(size_t)> on_tab_count_change;
Function<void(Widget&)> on_change;
Function<void(Widget&)> on_middle_click;
Function<void(Widget&)> on_tab_close_click;
Function<void(Widget&, ContextMenuEvent const&)> on_context_menu_request;
Function<void(Widget&)> on_double_click;
protected:
TabWidget();
virtual void paint_event(PaintEvent&) override;
virtual void child_event(Core::ChildEvent&) override;
virtual void resize_event(ResizeEvent&) override;
virtual void mousedown_event(MouseEvent&) override;
virtual void mouseup_event(MouseEvent&) override;
virtual void mousemove_event(MouseEvent&) override;
virtual void leave_event(Core::Event&) override;
virtual void keydown_event(KeyEvent&) override;
virtual void context_menu_event(ContextMenuEvent&) override;
virtual void doubleclick_event(MouseEvent&) override;
private:
Gfx::IntRect child_rect_for_size(Gfx::IntSize const&) const;
Gfx::IntRect button_rect(size_t index) const;
Gfx::IntRect vertical_button_rect(size_t index) const;
Gfx::IntRect horizontal_button_rect(size_t index) const;
Gfx::IntRect close_button_rect(size_t index) const;
Gfx::IntRect bar_rect() const;
Gfx::IntRect container_rect() const;
void update_bar();
void update_focus_policy();
int bar_margin() const { return 2; }
RefPtr<Widget> m_active_widget;
struct TabData {
int width(Gfx::Font const&) const;
String title;
RefPtr<Gfx::Bitmap> icon;
Widget* widget { nullptr };
};
Vector<TabData> m_tabs;
TabPosition m_tab_position { TabPosition::Top };
Optional<size_t> m_hovered_tab_index;
Optional<size_t> m_hovered_close_button_index;
Optional<size_t> m_pressed_close_button_index;
GUI::Margins m_container_margins { 2, 2, 2, 2 };
Gfx::TextAlignment m_text_alignment { Gfx::TextAlignment::Center };
bool m_uniform_tabs { false };
bool m_bar_visible { true };
bool m_close_button_enabled { false };
int m_max_tab_width { 160 };
int m_min_tab_width { 24 };
bool m_reorder_allowed { false };
bool m_dragging_active_tab { false };
int m_grab_offset { 0 };
int m_mouse_pos { 0 };
void drag_tab(size_t index);
void recalculate_tab_order();
};
}
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