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105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibGUI/Widget.h>
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namespace GUI {
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class Splitter : public Widget {
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C_OBJECT(Splitter);
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public:
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enum class OpportunisticResizee {
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First,
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Second
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};
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virtual ~Splitter() override = default;
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protected:
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explicit Splitter(Gfx::Orientation);
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virtual void paint_event(PaintEvent&) override;
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virtual void resize_event(ResizeEvent&) override;
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virtual void mousedown_event(MouseEvent&) override;
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virtual void mousemove_event(MouseEvent&) override;
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virtual void mouseup_event(MouseEvent&) override;
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virtual void leave_event(Core::Event&) override;
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virtual void did_layout() override;
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virtual void custom_layout() override;
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OpportunisticResizee opportunisitic_resizee() const { return m_opportunistic_resizee; }
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void set_opportunisitic_resizee(OpportunisticResizee resizee) { m_opportunistic_resizee = resizee; }
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private:
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void override_cursor(bool do_override);
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Gfx::IntRect rect_between_widgets(GUI::Widget const& first_widget, GUI::Widget const& second_widget, bool honor_grabbable_margins) const;
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Gfx::Orientation m_orientation;
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bool m_resizing { false };
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bool m_overriding_cursor { false };
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Gfx::IntPoint m_resize_origin;
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WeakPtr<Widget> m_first_resizee;
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WeakPtr<Widget> m_second_resizee;
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Gfx::IntSize m_first_resizee_start_size;
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Gfx::IntSize m_second_resizee_start_size;
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OpportunisticResizee m_opportunistic_resizee { OpportunisticResizee::Second };
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size_t m_last_child_count { 0 };
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int m_first_resizee_max_size { 0 };
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int m_second_resizee_max_size { 0 };
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void recompute_grabbables();
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struct Grabbable {
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// Index in m_grabbables, for convenience.
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size_t index { 0 };
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// The full grabbable rect, includes the content margin of adjacent elements.
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Gfx::IntRect grabbable_rect;
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// The rect used for painting. Does not include content margins.
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Gfx::IntRect paint_rect;
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WeakPtr<Widget> first_widget;
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WeakPtr<Widget> second_widget;
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};
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Grabbable* grabbable_at(Gfx::IntPoint);
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void set_hovered_grabbable(Grabbable*);
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Vector<Grabbable> m_grabbables;
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Optional<size_t> m_hovered_index;
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};
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class VerticalSplitter final : public Splitter {
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C_OBJECT(VerticalSplitter)
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public:
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virtual ~VerticalSplitter() override = default;
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private:
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VerticalSplitter()
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: Splitter(Gfx::Orientation::Vertical)
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{
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}
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};
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class HorizontalSplitter final : public Splitter {
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C_OBJECT(HorizontalSplitter)
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public:
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virtual ~HorizontalSplitter() override = default;
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private:
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HorizontalSplitter()
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: Splitter(Gfx::Orientation::Horizontal)
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{
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}
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};
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}
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