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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <LibGUI/Widget.h>
namespace GUI {
class TabWidget : public Widget {
C_OBJECT(TabWidget)
public:
enum TabPosition {
Top,
Bottom,
};
virtual ~TabWidget() override;
TabPosition tab_position() const { return m_tab_position; }
void set_tab_position(TabPosition);
int active_tab_index() const;
Widget* active_widget() { return m_active_widget.ptr(); }
const Widget* 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 ? 21 : 0; }
int container_padding() const { return m_container_padding; }
void set_container_padding(int padding) { m_container_padding = padding; }
void add_widget(const StringView&, Widget&);
void remove_widget(Widget&);
template<class T, class... Args>
T& add_tab(const StringView& title, Args&&... args)
{
auto t = T::construct(forward<Args>(args)...);
add_widget(title, *t);
return *t;
}
void remove_tab(Widget& tab) { remove_widget(tab); }
void set_tab_title(Widget& tab, const StringView& title);
void set_tab_icon(Widget& tab, const Gfx::Bitmap*);
void activate_next_tab();
void activate_previous_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; };
Function<void(size_t)> on_tab_count_change;
Function<void(Widget&)> on_change;
Function<void(Widget&)> on_middle_click;
Function<void(Widget&, const ContextMenuEvent&)> on_context_menu_request;
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 mousemove_event(MouseEvent&) override;
virtual void leave_event(Core::Event&) override;
virtual void keydown_event(KeyEvent&) override;
virtual void context_menu_event(ContextMenuEvent&) override;
private:
Gfx::IntRect child_rect_for_size(const Gfx::IntSize&) const;
Gfx::IntRect button_rect(int 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(const Gfx::Font&) const;
String title;
RefPtr<Gfx::Bitmap> icon;
Widget* widget { nullptr };
};
Vector<TabData> m_tabs;
TabPosition m_tab_position { TabPosition::Top };
int m_hovered_tab_index { -1 };
int m_container_padding { 2 };
Gfx::TextAlignment m_text_alignment { Gfx::TextAlignment::Center };
bool m_uniform_tabs { false };
bool m_bar_visible { true };
};
}
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