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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 <AK/StringBuilder.h>
28#include <Kernel/KeyCode.h>
29#include <LibGUI/Action.h>
30#include <LibGUI/ActionGroup.h>
31#include <LibGUI/Button.h>
32#include <LibGUI/Painter.h>
33#include <LibGfx/Font.h>
34#include <LibGfx/Palette.h>
35#include <LibGfx/StylePainter.h>
36
37namespace GUI {
38
39Button::Button(const StringView& text)
40 : AbstractButton(text)
41{
42}
43
44Button::~Button()
45{
46 if (m_action)
47 m_action->unregister_button({}, *this);
48}
49
50void Button::paint_event(PaintEvent& event)
51{
52 Painter painter(*this);
53 painter.add_clip_rect(event.rect());
54
55 Gfx::StylePainter::paint_button(painter, rect(), palette(), m_button_style, is_being_pressed(), is_hovered(), is_checked(), is_enabled());
56
57 if (text().is_empty() && !m_icon)
58 return;
59
60 auto content_rect = rect().shrunken(8, 2);
61 auto icon_location = m_icon ? content_rect.center().translated(-(m_icon->width() / 2), -(m_icon->height() / 2)) : Gfx::Point();
62 if (m_icon && !text().is_empty())
63 icon_location.set_x(content_rect.x());
64 if (is_being_pressed() || is_checked())
65 painter.translate(1, 1);
66 if (m_icon) {
67 if (is_enabled()) {
68 if (is_hovered())
69 painter.blit_brightened(icon_location, *m_icon, m_icon->rect());
70 else
71 painter.blit(icon_location, *m_icon, m_icon->rect());
72 } else {
73 painter.blit_dimmed(icon_location, *m_icon, m_icon->rect());
74 }
75 }
76 auto& font = is_checked() ? Gfx::Font::default_bold_font() : this->font();
77 if (m_icon && !text().is_empty()) {
78 content_rect.move_by(m_icon->width() + 4, 0);
79 content_rect.set_width(content_rect.width() - m_icon->width() - 4);
80 }
81
82 Gfx::Rect text_rect { 0, 0, font.width(text()), font.glyph_height() };
83 if (text_rect.width() > content_rect.width())
84 text_rect.set_width(content_rect.width());
85 text_rect.align_within(content_rect, text_alignment());
86 paint_text(painter, text_rect, font, text_alignment());
87}
88
89void Button::click()
90{
91 if (!is_enabled())
92 return;
93 if (is_checkable()) {
94 if (is_checked() && !is_uncheckable())
95 return;
96 set_checked(!is_checked());
97 }
98 if (on_click)
99 on_click();
100 if (m_action)
101 m_action->activate(this);
102}
103
104void Button::set_action(Action& action)
105{
106 m_action = action.make_weak_ptr();
107 action.register_button({}, *this);
108 set_enabled(action.is_enabled());
109 set_checkable(action.is_checkable());
110 if (action.is_checkable())
111 set_checked(action.is_checked());
112}
113
114void Button::set_icon(RefPtr<Gfx::Bitmap>&& icon)
115{
116 if (m_icon == icon)
117 return;
118 m_icon = move(icon);
119 update();
120}
121
122bool Button::is_uncheckable() const
123{
124 if (!m_action)
125 return true;
126 if (!m_action->group())
127 return true;
128 return m_action->group()->is_unchecking_allowed();
129}
130
131}