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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 <LibGUI/AbstractView.h>
28#include <LibGUI/Model.h>
29
30namespace GUI {
31
32Model::Model()
33{
34}
35
36Model::~Model()
37{
38}
39
40void Model::register_view(Badge<AbstractView>, AbstractView& view)
41{
42 m_views.set(&view);
43}
44
45void Model::unregister_view(Badge<AbstractView>, AbstractView& view)
46{
47 m_views.remove(&view);
48}
49
50void Model::for_each_view(Function<void(AbstractView&)> callback)
51{
52 for (auto* view : m_views)
53 callback(*view);
54}
55
56void Model::did_update()
57{
58 if (on_update)
59 on_update();
60 for_each_view([](auto& view) {
61 view.did_update_model();
62 });
63}
64
65ModelIndex Model::create_index(int row, int column, const void* data) const
66{
67 return ModelIndex(*this, row, column, const_cast<void*>(data));
68}
69
70ModelIndex Model::sibling(int row, int column, const ModelIndex& parent) const
71{
72 if (!parent.is_valid())
73 return index(row, column, {});
74 int row_count = this->row_count(parent);
75 if (row < 0 || row > row_count)
76 return {};
77 return index(row, column, parent);
78}
79
80bool Model::accepts_drag(const ModelIndex&, const StringView&)
81{
82 return false;
83}
84
85}