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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 "GlyphMapWidget.h"
28#include <LibGUI/Painter.h>
29#include <LibGfx/Font.h>
30#include <LibGfx/Palette.h>
31
32GlyphMapWidget::GlyphMapWidget(Gfx::Font& mutable_font)
33 : m_font(mutable_font)
34{
35 set_relative_rect({ 0, 0, preferred_width(), preferred_height() });
36}
37
38GlyphMapWidget::~GlyphMapWidget()
39{
40}
41
42int GlyphMapWidget::preferred_width() const
43{
44 return columns() * (font().max_glyph_width() + m_horizontal_spacing) + 2 + frame_thickness() * 2;
45}
46
47int GlyphMapWidget::preferred_height() const
48{
49 return rows() * (font().glyph_height() + m_vertical_spacing) + 2 + frame_thickness() * 2;
50}
51
52void GlyphMapWidget::set_selected_glyph(u8 glyph)
53{
54 if (m_selected_glyph == glyph)
55 return;
56 m_selected_glyph = glyph;
57 if (on_glyph_selected)
58 on_glyph_selected(glyph);
59 update();
60}
61
62Gfx::Rect GlyphMapWidget::get_outer_rect(u8 glyph) const
63{
64 int row = glyph / columns();
65 int column = glyph % columns();
66 return Gfx::Rect {
67 column * (font().max_glyph_width() + m_horizontal_spacing) + 1,
68 row * (font().glyph_height() + m_vertical_spacing) + 1,
69 font().max_glyph_width() + m_horizontal_spacing,
70 font().glyph_height() + m_horizontal_spacing
71 }
72 .translated(frame_thickness(), frame_thickness());
73}
74
75void GlyphMapWidget::update_glyph(u8 glyph)
76{
77 update(get_outer_rect(glyph));
78}
79
80void GlyphMapWidget::paint_event(GUI::PaintEvent& event)
81{
82 GUI::Frame::paint_event(event);
83
84 GUI::Painter painter(*this);
85 painter.add_clip_rect(event.rect());
86
87 painter.set_font(font());
88 painter.fill_rect(frame_inner_rect(), palette().base());
89
90 for (int glyph = 0; glyph < m_glyph_count; ++glyph) {
91 Gfx::Rect outer_rect = get_outer_rect(glyph);
92 Gfx::Rect inner_rect(
93 outer_rect.x() + m_horizontal_spacing / 2,
94 outer_rect.y() + m_vertical_spacing / 2,
95 font().max_glyph_width(),
96 font().glyph_height());
97 if (glyph == m_selected_glyph) {
98 painter.fill_rect(outer_rect, is_focused() ? palette().selection() : palette().inactive_selection());
99 painter.draw_glyph(inner_rect.location(), glyph, is_focused() ? palette().selection_text() : palette().inactive_selection_text());
100 } else {
101 painter.draw_glyph(inner_rect.location(), glyph, palette().base_text());
102 }
103 }
104}
105
106void GlyphMapWidget::mousedown_event(GUI::MouseEvent& event)
107{
108 GUI::Frame::mousedown_event(event);
109
110 // FIXME: This is a silly loop.
111 for (int glyph = 0; glyph < m_glyph_count; ++glyph) {
112 if (get_outer_rect(glyph).contains(event.position())) {
113 set_selected_glyph(glyph);
114 break;
115 }
116 }
117}
118
119void GlyphMapWidget::keydown_event(GUI::KeyEvent& event)
120{
121 GUI::Frame::keydown_event(event);
122
123 if (event.key() == KeyCode::Key_Up) {
124 if (selected_glyph() >= m_columns) {
125 set_selected_glyph(selected_glyph() - m_columns);
126 return;
127 }
128 }
129 if (event.key() == KeyCode::Key_Down) {
130 if (selected_glyph() < m_glyph_count - m_columns) {
131 set_selected_glyph(selected_glyph() + m_columns);
132 return;
133 }
134 }
135 if (event.key() == KeyCode::Key_Left) {
136 if (selected_glyph() > 0) {
137 set_selected_glyph(selected_glyph() - 1);
138 return;
139 }
140 }
141 if (event.key() == KeyCode::Key_Right) {
142 if (selected_glyph() < m_glyph_count - 1) {
143 set_selected_glyph(selected_glyph() + 1);
144 return;
145 }
146 }
147 if (event.ctrl() && event.key() == KeyCode::Key_Home) {
148 set_selected_glyph(0);
149 return;
150 }
151 if (event.ctrl() && event.key() == KeyCode::Key_End) {
152 set_selected_glyph(m_glyph_count - 1);
153 return;
154 }
155 if (!event.ctrl() && event.key() == KeyCode::Key_Home) {
156 set_selected_glyph(selected_glyph() / m_columns * m_columns);
157 return;
158 }
159 if (!event.ctrl() && event.key() == KeyCode::Key_End) {
160 int new_selection = selected_glyph() / m_columns * m_columns + (m_columns - 1);
161 new_selection = clamp(new_selection, 0, m_glyph_count - 1);
162 set_selected_glyph(new_selection);
163 return;
164 }
165}