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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/Widget.h>
namespace GUI {
class Splitter : public Widget {
C_OBJECT(Splitter);
public:
enum class OpportunisticResizee {
First,
Second
};
virtual ~Splitter() override = default;
protected:
explicit Splitter(Gfx::Orientation);
virtual void 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 leave_event(Core::Event&) override;
virtual void did_layout() override;
virtual void custom_layout() override;
OpportunisticResizee opportunisitic_resizee() const { return m_opportunistic_resizee; }
void set_opportunisitic_resizee(OpportunisticResizee resizee) { m_opportunistic_resizee = resizee; }
private:
void override_cursor(bool do_override);
Gfx::IntRect rect_between_widgets(GUI::Widget const& first_widget, GUI::Widget const& second_widget, bool honor_grabbable_margins) const;
Gfx::Orientation m_orientation;
bool m_resizing { false };
bool m_overriding_cursor { false };
Gfx::IntPoint m_resize_origin;
WeakPtr<Widget> m_first_resizee;
WeakPtr<Widget> m_second_resizee;
Gfx::IntSize m_first_resizee_start_size;
Gfx::IntSize m_second_resizee_start_size;
OpportunisticResizee m_opportunistic_resizee { OpportunisticResizee::Second };
size_t m_last_child_count { 0 };
int m_first_resizee_max_size { 0 };
int m_second_resizee_max_size { 0 };
void recompute_grabbables();
struct Grabbable {
// Index in m_grabbables, for convenience.
size_t index { 0 };
// The full grabbable rect, includes the content margin of adjacent elements.
Gfx::IntRect grabbable_rect;
// The rect used for painting. Does not include content margins.
Gfx::IntRect paint_rect;
WeakPtr<Widget> first_widget;
WeakPtr<Widget> second_widget;
};
Grabbable* grabbable_at(Gfx::IntPoint const&);
void set_hovered_grabbable(Grabbable*);
Vector<Grabbable> m_grabbables;
Optional<size_t> m_hovered_index;
};
class VerticalSplitter final : public Splitter {
C_OBJECT(VerticalSplitter)
public:
virtual ~VerticalSplitter() override = default;
private:
VerticalSplitter()
: Splitter(Gfx::Orientation::Vertical)
{
}
};
class HorizontalSplitter final : public Splitter {
C_OBJECT(HorizontalSplitter)
public:
virtual ~HorizontalSplitter() override = default;
private:
HorizontalSplitter()
: Splitter(Gfx::Orientation::Horizontal)
{
}
};
}
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