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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 <LibGfx/CharacterBitmap.h>
28#include <LibGfx/Painter.h>
29#include <LibGfx/StylePainter.h>
30#include <WindowServer/Button.h>
31#include <WindowServer/Event.h>
32#include <WindowServer/WindowManager.h>
33
34namespace WindowServer {
35
36Button::Button(WindowFrame& frame, NonnullRefPtr<Gfx::CharacterBitmap>&& bitmap, Function<void(Button&)>&& on_click_handler)
37 : on_click(move(on_click_handler))
38 , m_frame(frame)
39 , m_bitmap(move(bitmap))
40{
41}
42
43Button::~Button()
44{
45}
46
47void Button::paint(Gfx::Painter& painter)
48{
49 auto palette = WindowManager::the().palette();
50 Gfx::PainterStateSaver saver(painter);
51 painter.translate(relative_rect().location());
52 Gfx::StylePainter::paint_button(painter, rect(), palette, Gfx::ButtonStyle::Normal, m_pressed, m_hovered);
53 auto x_location = rect().center();
54 x_location.move_by(-(m_bitmap->width() / 2), -(m_bitmap->height() / 2));
55 if (m_pressed)
56 x_location.move_by(1, 1);
57 painter.draw_bitmap(x_location, *m_bitmap, palette.button_text());
58}
59
60void Button::on_mouse_event(const MouseEvent& event)
61{
62 auto& wm = WindowManager::the();
63
64 if (event.type() == Event::MouseDown && event.button() == MouseButton::Left) {
65 m_pressed = true;
66 wm.set_cursor_tracking_button(this);
67 wm.invalidate(screen_rect());
68 return;
69 }
70
71 if (event.type() == Event::MouseUp && event.button() == MouseButton::Left) {
72 if (wm.cursor_tracking_button() != this)
73 return;
74 wm.set_cursor_tracking_button(nullptr);
75 bool old_pressed = m_pressed;
76 m_pressed = false;
77 if (rect().contains(event.position())) {
78 if (on_click)
79 on_click(*this);
80 }
81 if (old_pressed != m_pressed)
82 wm.invalidate(screen_rect());
83 return;
84 }
85
86 if (event.type() == Event::MouseMove) {
87 bool old_hovered = m_hovered;
88 m_hovered = rect().contains(event.position());
89 wm.set_hovered_button(m_hovered ? this : nullptr);
90 if (old_hovered != m_hovered)
91 wm.invalidate(screen_rect());
92 }
93
94 if (event.type() == Event::MouseMove && event.buttons() & (unsigned)MouseButton::Left) {
95 if (wm.cursor_tracking_button() != this)
96 return;
97 bool old_pressed = m_pressed;
98 m_pressed = m_hovered;
99 if (old_pressed != m_pressed)
100 wm.invalidate(screen_rect());
101 }
102}
103
104Gfx::Rect Button::screen_rect() const
105{
106 return m_relative_rect.translated(m_frame.rect().location());
107}
108
109}