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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#include "WidgetTreeModel.h"
28#include <AK/StringBuilder.h>
29#include <LibGUI/Widget.h>
30#include <stdio.h>
31
32WidgetTreeModel::WidgetTreeModel(GUI::Widget& root)
33 : m_root(root)
34{
35 m_widget_icon.set_bitmap_for_size(16, Gfx::Bitmap::load_from_file("/res/icons/16x16/inspector-object.png"));
36}
37
38WidgetTreeModel::~WidgetTreeModel()
39{
40}
41
42GUI::ModelIndex WidgetTreeModel::index(int row, int column, const GUI::ModelIndex& parent) const
43{
44 if (!parent.is_valid()) {
45 return create_index(row, column, m_root.ptr());
46 }
47 auto& parent_node = *static_cast<GUI::Widget*>(parent.internal_data());
48 return create_index(row, column, parent_node.child_widgets().at(row));
49}
50
51GUI::ModelIndex WidgetTreeModel::parent_index(const GUI::ModelIndex& index) const
52{
53 if (!index.is_valid())
54 return {};
55 auto& widget = *static_cast<GUI::Widget*>(index.internal_data());
56 if (&widget == m_root.ptr())
57 return {};
58
59 if (widget.parent_widget() == m_root.ptr())
60 return create_index(0, 0, m_root.ptr());
61
62 // Walk the grandparent's children to find the index of widget's parent in its parent.
63 // (This is needed to produce the row number of the GUI::ModelIndex corresponding to widget's parent.)
64 int grandparent_child_index = 0;
65 for (auto& grandparent_child : widget.parent_widget()->parent_widget()->child_widgets()) {
66 if (grandparent_child == widget.parent_widget())
67 return create_index(grandparent_child_index, 0, widget.parent_widget());
68 ++grandparent_child_index;
69 }
70
71 ASSERT_NOT_REACHED();
72 return {};
73}
74
75int WidgetTreeModel::row_count(const GUI::ModelIndex& index) const
76{
77 if (!index.is_valid())
78 return 1;
79 auto& widget = *static_cast<GUI::Widget*>(index.internal_data());
80 return widget.child_widgets().size();
81}
82
83int WidgetTreeModel::column_count(const GUI::ModelIndex&) const
84{
85 return 1;
86}
87
88GUI::Variant WidgetTreeModel::data(const GUI::ModelIndex& index, Role role) const
89{
90 auto* widget = static_cast<GUI::Widget*>(index.internal_data());
91 if (role == Role::Icon) {
92 return m_widget_icon;
93 }
94 if (role == Role::Display) {
95 return String::format("%s (%s)", widget->class_name(), widget->relative_rect().to_string().characters());
96 }
97 return {};
98}
99
100void WidgetTreeModel::update()
101{
102 did_update();
103}
104
105GUI::ModelIndex WidgetTreeModel::index_for_widget(GUI::Widget& widget) const
106{
107 int parent_child_index = 0;
108 for (auto& parent_child : widget.parent_widget()->child_widgets()) {
109 if (parent_child == &widget)
110 return create_index(parent_child_index, 0, &widget);
111 ++parent_child_index;
112 }
113 return {};
114}