jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, Erlend Høier <Erlend@ReasonablePanic.com>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include "AnalogClock.h"
8#include <LibCore/DateTime.h>
9#include <LibGUI/Application.h>
10#include <LibGUI/Window.h>
11#include <LibGfx/Palette.h>
12#include <LibGfx/Path.h>
13
14void AnalogClock::draw_graduations(GUI::Painter& painter, Gfx::IntRect& rect, int x, int y)
15{
16 rect.set_x(x);
17 rect.set_y(y);
18
19 painter.fill_rect(rect, palette().active_window_border2());
20
21 painter.draw_line(rect.top_left(), rect.top_right(), palette().threed_highlight());
22 painter.draw_line(rect.bottom_left(), rect.bottom_right(), palette().active_window_border1().darkened(0.7f));
23 painter.draw_line(rect.bottom_right(), rect.top_right(), palette().active_window_border1().darkened(0.7f));
24 painter.draw_line(rect.top_left(), rect.bottom_left(), palette().threed_highlight());
25}
26
27// To create an even clock face it's necessary to mirror the graduations positions
28void AnalogClock::draw_mirrored_graduations(GUI::Painter& painter, Gfx::IntRect& rect, int x, int y, int rect_center_offset)
29{
30 auto w = this->rect().center().x() - rect_center_offset;
31 auto h = this->rect().center().y() - rect_center_offset;
32
33 draw_graduations(painter, rect, x + w, y + h);
34 draw_graduations(painter, rect, y + w, x + h);
35 draw_graduations(painter, rect, -x + w, y + h);
36 draw_graduations(painter, rect, -y + w, x + h);
37 draw_graduations(painter, rect, x + w, -y + h);
38 draw_graduations(painter, rect, y + w, -x + h);
39 draw_graduations(painter, rect, -x + w, -y + h);
40 draw_graduations(painter, rect, -y + w, -x + h);
41}
42
43void AnalogClock::draw_face(GUI::Painter& painter)
44{
45 int x, y;
46 double angle = 2 * M_PI / 60;
47
48 for (int i = 0; i <= 7; ++i) {
49 x = sin(angle * static_cast<double>(i)) * m_clock_face_radius;
50 y = cos(angle * static_cast<double>(i)) * m_clock_face_radius;
51
52 draw_mirrored_graduations(painter, m_small_graduation_square, x, y, 1);
53
54 if (i % 5 == 0)
55 draw_mirrored_graduations(painter, m_big_graduation_square, x, y, 2);
56 }
57}
58
59void AnalogClock::draw_hand(GUI::Painter& painter, double angle, double length, Gfx::Color hand_color)
60{
61 if (angle >= 2 * M_PI)
62 angle -= 2 * M_PI;
63
64 double cosine = cos(angle);
65 double sine = sin(angle);
66
67 double hand_x = (rect().center().x() + (cosine * length));
68 double hand_y = (rect().center().y() + (sine * length));
69
70 Gfx::IntPoint indicator_point(hand_x, hand_y);
71 Gfx::IntPoint tail_point(rect().center().x() + (-cosine * m_hand_tail_length), rect().center().y() + (-sine * m_hand_tail_length));
72 Gfx::IntPoint right_wing_point(rect().center().x() + (-sine * m_hand_wing_span), rect().center().y() + (cosine * m_hand_wing_span));
73 Gfx::IntPoint left_wing_point(rect().center().x() + (sine * m_hand_wing_span), rect().center().y() + (-cosine * m_hand_wing_span));
74
75 Gfx::Path hand_fill;
76 hand_fill.move_to(static_cast<Gfx::FloatPoint>(indicator_point));
77 hand_fill.line_to(static_cast<Gfx::FloatPoint>(left_wing_point));
78 hand_fill.line_to(static_cast<Gfx::FloatPoint>(tail_point));
79 hand_fill.line_to(static_cast<Gfx::FloatPoint>(right_wing_point));
80 hand_fill.close();
81
82 painter.fill_path(hand_fill, hand_color, Gfx::Painter::WindingRule::Nonzero);
83
84 // Draw highlight depending on the angle, this creates a subtle 3d effect.
85 // remember the angle value is offset by half pi.
86 if (angle > M_PI_2 - (M_PI / 3) && angle < M_PI + (M_PI / 3)) {
87 painter.draw_line(left_wing_point, indicator_point, hand_color.darkened(0.7f));
88 painter.draw_line(left_wing_point, tail_point, hand_color.darkened(0.7f));
89
90 painter.draw_line(right_wing_point, indicator_point, palette().threed_highlight());
91 painter.draw_line(right_wing_point, tail_point, palette().threed_highlight());
92 } else {
93 painter.draw_line(right_wing_point, indicator_point, hand_color.darkened(0.7f));
94 painter.draw_line(right_wing_point, tail_point, hand_color.darkened(0.7f));
95
96 painter.draw_line(left_wing_point, indicator_point, palette().threed_highlight());
97 painter.draw_line(left_wing_point, tail_point, palette().threed_highlight());
98 }
99};
100
101void AnalogClock::draw_seconds_hand(GUI::Painter& painter, double angle)
102{
103 double hand_x = (rect().center().x() + (cos(angle)) * (m_clock_face_radius - 10));
104 double hand_y = (rect().center().y() + (sin(angle)) * (m_clock_face_radius - 10));
105
106 Gfx::IntPoint indicator_point(hand_x, hand_y);
107 painter.draw_line(rect().center(), indicator_point, palette().base_text());
108}
109
110void AnalogClock::paint_event(GUI::PaintEvent& event)
111{
112 GUI::Painter painter(*this);
113 painter.clear_rect(event.rect(), m_show_window_frame ? palette().window() : Gfx::Color::Transparent);
114
115 draw_face(painter);
116
117 auto time = Core::DateTime::now();
118 auto minute = time.minute() * (2 * M_PI) / 60;
119 auto hour = (minute + (2 * M_PI) * time.hour()) / 12;
120 auto seconds = time.second() * (2 * M_PI) / 60;
121 auto angle_offset = M_PI_2;
122
123 draw_hand(painter, minute - angle_offset, m_minute_hand_length, palette().active_window_border2());
124 draw_hand(painter, hour - angle_offset, m_hour_hand_length, palette().active_window_border1());
125 draw_seconds_hand(painter, seconds - angle_offset);
126
127 if (time.hour() == 0)
128 update_title_date();
129}
130
131void AnalogClock::update_title_date()
132{
133 window()->set_title(Core::DateTime::now().to_deprecated_string("%Y-%m-%d"sv));
134}
135
136void AnalogClock::context_menu_event(GUI::ContextMenuEvent& event)
137{
138 if (on_context_menu_request)
139 on_context_menu_request(event);
140}
141
142void AnalogClock::set_show_window_frame(bool show)
143{
144 if (show == m_show_window_frame)
145 return;
146 m_show_window_frame = show;
147 auto& w = *window();
148 w.set_frameless(!m_show_window_frame);
149 w.set_has_alpha_channel(!m_show_window_frame);
150}