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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 "QSWidget.h"
28#include <AK/URL.h>
29#include <LibCore/MimeData.h>
30#include <LibGUI/MessageBox.h>
31#include <LibGUI/Painter.h>
32#include <LibGUI/Window.h>
33#include <LibGfx/Bitmap.h>
34
35QSWidget::QSWidget()
36{
37 set_fill_with_background_color(true);
38 set_background_color(Color::Black);
39}
40
41QSWidget::~QSWidget()
42{
43}
44
45void QSWidget::set_bitmap(NonnullRefPtr<Gfx::Bitmap> bitmap)
46{
47 m_bitmap = move(bitmap);
48}
49
50void QSWidget::relayout()
51{
52 Gfx::Size new_size;
53 float scale_factor = (float)m_scale / 100.0f;
54 new_size.set_width(m_bitmap->width() * scale_factor);
55 new_size.set_height(m_bitmap->height() * scale_factor);
56 m_bitmap_rect.set_size(new_size);
57 update();
58}
59
60void QSWidget::resize_event(GUI::ResizeEvent& event)
61{
62 relayout();
63 GUI::Widget::resize_event(event);
64}
65
66void QSWidget::paint_event(GUI::PaintEvent& event)
67{
68 GUI::Painter painter(*this);
69 painter.add_clip_rect(event.rect());
70
71 painter.draw_scaled_bitmap(m_bitmap_rect, *m_bitmap, m_bitmap->rect());
72}
73
74void QSWidget::mousedown_event(GUI::MouseEvent& event)
75{
76 if (event.button() != GUI::MouseButton::Left)
77 return;
78 m_pan_origin = event.position();
79 m_pan_bitmap_origin = m_bitmap_rect.location();
80}
81
82void QSWidget::mouseup_event(GUI::MouseEvent& event)
83{
84 UNUSED_PARAM(event);
85}
86
87void QSWidget::mousemove_event(GUI::MouseEvent& event)
88{
89 if (!(event.buttons() & GUI::MouseButton::Left))
90 return;
91
92 auto delta = event.position() - m_pan_origin;
93 m_bitmap_rect.set_location(m_pan_bitmap_origin.translated(delta));
94 update();
95}
96
97void QSWidget::mousewheel_event(GUI::MouseEvent& event)
98{
99 auto old_scale = m_scale;
100 auto old_scale_factor = (float)m_scale / 100.0f;
101 auto zoom_point = event.position().translated(-m_bitmap_rect.location());
102 zoom_point.set_x((float)zoom_point.x() / old_scale_factor);
103 zoom_point.set_y((float)zoom_point.y() / old_scale_factor);
104 m_scale += -event.wheel_delta() * 10;
105 if (m_scale < 10)
106 m_scale = 10;
107 if (m_scale > 1000)
108 m_scale = 1000;
109 relayout();
110 auto new_scale_factor = (float)m_scale / 100.0f;
111 auto scale_factor_change = new_scale_factor - old_scale_factor;
112 m_bitmap_rect.move_by(-Gfx::Point((float)zoom_point.x() * scale_factor_change, (float)zoom_point.y() * scale_factor_change));
113 if (old_scale != m_scale) {
114 if (on_scale_change)
115 on_scale_change(m_scale);
116 }
117}
118
119void QSWidget::set_path(const String& path)
120{
121 m_path = path;
122}
123
124void QSWidget::drop_event(GUI::DropEvent& event)
125{
126 event.accept();
127 window()->move_to_front();
128
129 if (event.mime_data().has_urls()) {
130 auto urls = event.mime_data().urls();
131 if (urls.is_empty())
132 return;
133 if (urls.size() > 1) {
134 GUI::MessageBox::show("QuickShow can only open one file at a time!", "One at a time please!", GUI::MessageBox::Type::Error, GUI::MessageBox::InputType::OK, window());
135 return;
136 }
137 auto url = urls.first();
138 auto bitmap = Gfx::Bitmap::load_from_file(url.path());
139 if (!bitmap) {
140 GUI::MessageBox::show(String::format("Failed to open %s", url.to_string().characters()), "Cannot open image", GUI::MessageBox::Type::Error, GUI::MessageBox::InputType::OK, window());
141 return;
142 }
143
144 m_path = url.path();
145 m_bitmap = bitmap;
146 m_scale = 100;
147 if (on_scale_change)
148 on_scale_change(m_scale);
149 relayout();
150 m_bitmap_rect.center_within(rect());
151 }
152}