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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include <LibGUI/Frame.h>
30
31namespace GUI {
32
33class Splitter : public Frame {
34 C_OBJECT(Splitter)
35public:
36 virtual ~Splitter() override;
37
38protected:
39 explicit Splitter(Gfx::Orientation);
40
41 virtual void paint_event(PaintEvent&) override;
42 virtual void resize_event(ResizeEvent&) override;
43 virtual void mousedown_event(MouseEvent&) override;
44 virtual void mousemove_event(MouseEvent&) override;
45 virtual void mouseup_event(MouseEvent&) override;
46 virtual void enter_event(Core::Event&) override;
47 virtual void leave_event(Core::Event&) override;
48
49 virtual void did_layout() override;
50
51private:
52 void recompute_grabbable_rect(const Widget&, const Widget&);
53 bool get_resize_candidates_at(const Gfx::Point&, Widget*&, Widget*&);
54
55 Gfx::Orientation m_orientation;
56 bool m_resizing { false };
57 Gfx::Point m_resize_origin;
58 WeakPtr<Widget> m_first_resizee;
59 WeakPtr<Widget> m_second_resizee;
60 Gfx::Size m_first_resizee_start_size;
61 Gfx::Size m_second_resizee_start_size;
62 Gfx::Rect m_grabbable_rect;
63};
64
65class VerticalSplitter final : public Splitter {
66 C_OBJECT(VerticalSplitter)
67public:
68 virtual ~VerticalSplitter() override {}
69
70private:
71 VerticalSplitter()
72 : Splitter(Gfx::Orientation::Vertical)
73 {
74 }
75};
76
77class HorizontalSplitter final : public Splitter {
78 C_OBJECT(HorizontalSplitter)
79public:
80 virtual ~HorizontalSplitter() override {}
81
82private:
83 HorizontalSplitter()
84 : Splitter(Gfx::Orientation::Horizontal)
85 {
86 }
87};
88
89}