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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 <AK/HashTable.h>
30#include <LibGUI/ScrollableWidget.h>
31
32class FormWidget;
33class Tool;
34class WidgetTreeModel;
35
36class FormEditorWidget final : public GUI::ScrollableWidget {
37 C_OBJECT(FormEditorWidget)
38public:
39 virtual ~FormEditorWidget() override;
40
41 FormWidget& form_widget() { return *m_form_widget; }
42 const FormWidget& form_widget() const { return *m_form_widget; }
43
44 Tool& tool() { return *m_tool; }
45 const Tool& tool() const { return *m_tool; }
46
47 void set_tool(NonnullOwnPtr<Tool>);
48
49 WidgetTreeModel& model();
50
51 class WidgetSelection {
52 public:
53 Function<void(GUI::Widget&)> on_remove;
54 Function<void(GUI::Widget&)> on_add;
55 Function<void()> on_clear;
56
57 void enable_hooks() { m_hooks_enabled = true; }
58 void disable_hooks() { m_hooks_enabled = false; }
59
60 bool is_empty() const
61 {
62 return m_widgets.is_empty();
63 }
64
65 bool contains(GUI::Widget& widget) const
66 {
67 return m_widgets.contains(&widget);
68 }
69
70 void toggle(GUI::Widget& widget)
71 {
72 if (contains(widget))
73 remove(widget);
74 else
75 add(widget);
76 }
77
78 void set(GUI::Widget& widget)
79 {
80 clear();
81 add(widget);
82 }
83
84 void remove(GUI::Widget& widget)
85 {
86 ASSERT(m_widgets.contains(&widget));
87 m_widgets.remove(&widget);
88 if (m_hooks_enabled && on_remove)
89 on_remove(widget);
90 }
91
92 void add(GUI::Widget& widget)
93 {
94 m_widgets.set(&widget);
95 if (m_hooks_enabled && on_add)
96 on_add(widget);
97 }
98
99 void clear()
100 {
101 m_widgets.clear();
102 if (m_hooks_enabled && on_clear)
103 on_clear();
104 }
105
106 template<typename Callback>
107 void for_each(Callback callback)
108 {
109 for (auto& it : m_widgets) {
110 if (callback(*it) == IterationDecision::Break)
111 break;
112 }
113 }
114
115 WidgetSelection() {}
116
117 private:
118 HashTable<GUI::Widget*> m_widgets;
119 bool m_hooks_enabled { true };
120 };
121
122 WidgetSelection& selection() { return m_selection; }
123
124private:
125 virtual void paint_event(GUI::PaintEvent&) override;
126
127 FormEditorWidget();
128
129 RefPtr<FormWidget> m_form_widget;
130 RefPtr<WidgetTreeModel> m_widget_tree_model;
131 NonnullOwnPtr<Tool> m_tool;
132 WidgetSelection m_selection;
133};