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Userland: Rename QuickShow => Image Viewer

The old name was a bit too ambiguous. This one is crystal clear. :^)
This commit is contained in:
Andreas Kling 2021-05-14 18:34:44 +02:00
parent d039542c7c
commit 58d73ea36c
11 changed files with 50 additions and 50 deletions

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set(SOURCES
main.cpp
QSWidget.cpp
)
serenity_app(ImageViewer ICON filetype-image)
target_link_libraries(ImageViewer LibDesktop LibGUI LibGfx)

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "QSWidget.h"
#include <AK/MappedFile.h>
#include <AK/StringBuilder.h>
#include <LibCore/DirIterator.h>
#include <LibCore/Timer.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Orientation.h>
#include <LibGfx/Palette.h>
QSWidget::QSWidget()
: m_timer(Core::Timer::construct())
{
set_fill_with_background_color(false);
}
QSWidget::~QSWidget()
{
}
void QSWidget::clear()
{
m_bitmap = nullptr;
m_path = {};
reset_view();
update();
}
void QSWidget::flip(Gfx::Orientation orientation)
{
m_bitmap = m_bitmap->flipped(orientation);
set_scale(m_scale);
resize_window();
}
void QSWidget::rotate(Gfx::RotationDirection rotation_direction)
{
m_bitmap = m_bitmap->rotated(rotation_direction);
set_scale(m_scale);
resize_window();
}
void QSWidget::navigate(Directions direction)
{
if (m_path == nullptr)
return;
auto parts = m_path.split('/');
parts.remove(parts.size() - 1);
StringBuilder sb;
sb.append("/");
sb.join("/", parts);
auto current_dir = sb.to_string();
if (m_files_in_same_dir.is_empty()) {
Core::DirIterator iterator(current_dir, Core::DirIterator::Flags::SkipDots);
while (iterator.has_next()) {
String file = iterator.next_full_path();
if (!Gfx::Bitmap::is_path_a_supported_image_format(file))
continue;
m_files_in_same_dir.append(file);
}
}
auto current_index = m_files_in_same_dir.find_first_index(m_path);
if (!current_index.has_value()) {
return;
}
size_t index = current_index.value();
if (direction == Directions::Back) {
if (index == 0) {
GUI::MessageBox::show(window(), "This is the first file.", "Cannot open image", GUI::MessageBox::Type::Error);
return;
}
index--;
} else if (direction == Directions::Forward) {
if (index == m_files_in_same_dir.size() - 1) {
GUI::MessageBox::show(window(), "This is the last file.", "Cannot open image", GUI::MessageBox::Type::Error);
return;
}
index++;
} else if (direction == Directions::First) {
index = 0;
} else if (direction == Directions::Last) {
index = m_files_in_same_dir.size() - 1;
}
this->load_from_file(m_files_in_same_dir.at(index));
}
void QSWidget::set_scale(int scale)
{
if (m_bitmap.is_null())
return;
if (m_scale == scale) {
update();
return;
}
if (scale < 10)
scale = 10;
if (scale > 1000)
scale = 1000;
m_scale = scale;
float scale_factor = (float)m_scale / 100.0f;
Gfx::IntSize new_size;
new_size.set_width(m_bitmap->width() * scale_factor);
new_size.set_height(m_bitmap->height() * scale_factor);
m_bitmap_rect.set_size(new_size);
if (on_scale_change)
on_scale_change(m_scale, m_bitmap_rect);
relayout();
}
void QSWidget::relayout()
{
if (m_bitmap.is_null())
return;
Gfx::IntSize new_size = m_bitmap_rect.size();
Gfx::IntPoint new_location;
new_location.set_x((width() / 2) - (new_size.width() / 2) - m_pan_origin.x());
new_location.set_y((height() / 2) - (new_size.height() / 2) - m_pan_origin.y());
m_bitmap_rect.set_location(new_location);
update();
}
void QSWidget::resize_event(GUI::ResizeEvent& event)
{
relayout();
GUI::Widget::resize_event(event);
}
void QSWidget::doubleclick_event(GUI::MouseEvent&)
{
on_doubleclick();
}
void QSWidget::paint_event(GUI::PaintEvent& event)
{
Frame::paint_event(event);
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.add_clip_rect(frame_inner_rect());
Gfx::StylePainter::paint_transparency_grid(painter, frame_inner_rect(), palette());
if (!m_bitmap.is_null())
painter.draw_scaled_bitmap(m_bitmap_rect, *m_bitmap, m_bitmap->rect());
}
void QSWidget::mousedown_event(GUI::MouseEvent& event)
{
if (event.button() != GUI::MouseButton::Left)
return;
m_click_position = event.position();
m_saved_pan_origin = m_pan_origin;
}
void QSWidget::mouseup_event([[maybe_unused]] GUI::MouseEvent& event) { }
void QSWidget::mousemove_event(GUI::MouseEvent& event)
{
if (!(event.buttons() & GUI::MouseButton::Left))
return;
auto delta = event.position() - m_click_position;
m_pan_origin = m_saved_pan_origin.translated(
-delta.x(),
-delta.y());
relayout();
}
void QSWidget::mousewheel_event(GUI::MouseEvent& event)
{
int new_scale = m_scale - event.wheel_delta() * 10;
if (new_scale < 10)
new_scale = 10;
if (new_scale > 1000)
new_scale = 1000;
if (new_scale == m_scale) {
return;
}
auto old_scale_factor = (float)m_scale / 100.0f;
auto new_scale_factor = (float)new_scale / 100.0f;
// focus_point is the window position the cursor is pointing to.
// The pixel (in image space) the cursor points to is located at
// (m_pan_origin + focus_point) / scale_factor.
// We want the image after scaling to be panned in such a way that the cursor
// will still point to the same image pixel. Basically, we need to solve
// (m_pan_origin + focus_point) / old_scale_factor = (new_m_pan_origin + focus_point) / new_scale_factor.
Gfx::FloatPoint focus_point {
event.x() - width() / 2.0f,
event.y() - height() / 2.0f
};
// A little algebra shows that new m_pan_origin equals to:
m_pan_origin = (m_pan_origin + focus_point) * (new_scale_factor / old_scale_factor) - focus_point;
set_scale(new_scale);
}
void QSWidget::load_from_file(const String& path)
{
auto show_error = [&] {
GUI::MessageBox::show(window(), String::formatted("Failed to open {}", path), "Cannot open image", GUI::MessageBox::Type::Error);
};
auto file_or_error = MappedFile::map(path);
if (file_or_error.is_error()) {
show_error();
return;
}
auto& mapped_file = *file_or_error.value();
m_image_decoder = Gfx::ImageDecoder::create((const u8*)mapped_file.data(), mapped_file.size());
auto bitmap = m_image_decoder->bitmap();
if (!bitmap) {
show_error();
return;
}
if (m_image_decoder->is_animated() && m_image_decoder->frame_count() > 1) {
const auto& first_frame = m_image_decoder->frame(0);
m_timer->set_interval(first_frame.duration);
m_timer->on_timeout = [this] { animate(); };
m_timer->start();
}
m_path = path;
m_bitmap = bitmap;
m_scale = -1;
reset_view();
}
void QSWidget::drop_event(GUI::DropEvent& event)
{
event.accept();
if (on_drop)
on_drop(event);
}
void QSWidget::resize_window()
{
if (window()->is_fullscreen())
return;
if (!m_bitmap)
return;
auto new_size = m_bitmap->size();
if (new_size.width() < 300)
new_size.set_width(300);
if (new_size.height() < 200)
new_size.set_height(200);
new_size.set_height(new_size.height() + m_toolbar_height);
window()->resize(new_size);
}
void QSWidget::reset_view()
{
m_pan_origin = { 0, 0 };
set_scale(100);
}
void QSWidget::set_bitmap(const Gfx::Bitmap* bitmap)
{
if (m_bitmap == bitmap)
return;
m_bitmap = bitmap;
update();
}
// Same as ImageWidget::animate(), you probably want to keep any changes in sync
void QSWidget::animate()
{
m_current_frame_index = (m_current_frame_index + 1) % m_image_decoder->frame_count();
const auto& current_frame = m_image_decoder->frame(m_current_frame_index);
set_bitmap(current_frame.image);
if (current_frame.duration != m_timer->interval()) {
m_timer->restart(current_frame.duration);
}
if (m_current_frame_index == m_image_decoder->frame_count() - 1) {
++m_loops_completed;
if (m_loops_completed > 0 && m_loops_completed == m_image_decoder->loop_count()) {
m_timer->stop();
}
}
}

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibCore/Timer.h>
#include <LibGUI/Frame.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/ImageDecoder.h>
#include <LibGfx/Point.h>
class QSWidget final : public GUI::Frame {
C_OBJECT(QSWidget)
public:
enum Directions {
First,
Back,
Forward,
Last
};
virtual ~QSWidget() override;
const Gfx::Bitmap* bitmap() const { return m_bitmap.ptr(); }
const String& path() const { return m_path; }
void set_scale(int);
int scale() { return m_scale; }
void set_toolbar_height(int height) { m_toolbar_height = height; }
int toolbar_height() { return m_toolbar_height; }
void clear();
void flip(Gfx::Orientation);
void rotate(Gfx::RotationDirection);
void navigate(Directions);
void load_from_file(const String&);
Function<void(int, Gfx::IntRect)> on_scale_change;
Function<void()> on_doubleclick;
Function<void(const GUI::DropEvent&)> on_drop;
private:
QSWidget();
virtual void doubleclick_event(GUI::MouseEvent&) override;
virtual void paint_event(GUI::PaintEvent&) override;
virtual void resize_event(GUI::ResizeEvent&) override;
virtual void mousedown_event(GUI::MouseEvent&) override;
virtual void mouseup_event(GUI::MouseEvent&) override;
virtual void mousemove_event(GUI::MouseEvent&) override;
virtual void mousewheel_event(GUI::MouseEvent&) override;
virtual void drop_event(GUI::DropEvent&) override;
void set_bitmap(const Gfx::Bitmap* bitmap);
void relayout();
void resize_window();
void reset_view();
void animate();
String m_path;
RefPtr<Gfx::Bitmap> m_bitmap;
Gfx::IntRect m_bitmap_rect;
RefPtr<Gfx::ImageDecoder> m_image_decoder;
size_t m_current_frame_index { 0 };
size_t m_loops_completed { 0 };
NonnullRefPtr<Core::Timer> m_timer;
int m_scale { -1 };
int m_toolbar_height { 28 };
Gfx::FloatPoint m_pan_origin;
Gfx::IntPoint m_click_position;
Gfx::FloatPoint m_saved_pan_origin;
Vector<String> m_files_in_same_dir;
};

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "QSWidget.h"
#include <AK/URL.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/MimeData.h>
#include <LibDesktop/Launcher.h>
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Clipboard.h>
#include <LibGUI/Desktop.h>
#include <LibGUI/FilePicker.h>
#include <LibGUI/Label.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Menubar.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Toolbar.h>
#include <LibGUI/ToolbarContainer.h>
#include <LibGUI/Window.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Palette.h>
#include <LibGfx/Rect.h>
#include <serenity.h>
#include <stdio.h>
#include <string.h>
int main(int argc, char** argv)
{
if (pledge("stdio recvfd sendfd rpath wpath cpath unix thread", nullptr) < 0) {
perror("pledge");
return 1;
}
auto app = GUI::Application::construct(argc, argv);
if (!Desktop::Launcher::add_allowed_handler_with_any_url("/bin/ImageViewer")) {
warnln("Failed to set up allowed launch URLs");
return 1;
}
if (!Desktop::Launcher::add_allowed_handler_with_only_specific_urls(
"/bin/Help", { URL::create_with_file_protocol("/usr/share/man/man1/ImageViewer.md") })) {
warnln("Failed to set up allowed launch URLs");
return 1;
}
if (!Desktop::Launcher::seal_allowlist()) {
warnln("Failed to seal allowed launch URLs");
return 1;
}
auto app_icon = GUI::Icon::default_icon("filetype-image");
const char* path = nullptr;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(path, "The image file to be displayed.", "file", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
auto window = GUI::Window::construct();
window->set_double_buffering_enabled(true);
window->resize(300, 200);
window->set_icon(app_icon.bitmap_for_size(16));
window->set_title("Image Viewer");
auto& root_widget = window->set_main_widget<GUI::Widget>();
root_widget.set_fill_with_background_color(true);
root_widget.set_layout<GUI::VerticalBoxLayout>();
root_widget.layout()->set_spacing(2);
auto& toolbar_container = root_widget.add<GUI::ToolbarContainer>();
auto& main_toolbar = toolbar_container.add<GUI::Toolbar>();
auto& widget = root_widget.add<QSWidget>();
widget.on_scale_change = [&](int scale, Gfx::IntRect rect) {
if (!widget.bitmap()) {
window->set_title("Image Viewer");
return;
}
window->set_title(String::formatted("{} {} {}% - Image Viewer", widget.path(), widget.bitmap()->size().to_string(), scale));
if (window->is_fullscreen())
return;
if (window->is_maximized())
return;
auto w = max(window->width(), rect.width() + 4);
auto h = max(window->height(), rect.height() + widget.toolbar_height() + 6);
window->resize(w, h);
};
widget.on_drop = [&](auto& event) {
window->move_to_front();
if (!event.mime_data().has_urls())
return;
auto urls = event.mime_data().urls();
if (urls.is_empty())
return;
widget.load_from_file(urls.first().path());
for (size_t i = 1; i < urls.size(); ++i) {
Desktop::Launcher::open(URL::create_with_file_protocol(urls[i].path().characters()), "/bin/ImageViewer");
}
};
widget.on_doubleclick = [&] {
window->set_fullscreen(!window->is_fullscreen());
toolbar_container.set_visible(!window->is_fullscreen());
};
// Actions
auto open_action = GUI::CommonActions::make_open_action(
[&](auto&) {
auto path = GUI::FilePicker::get_open_filepath(window, "Open Image");
if (path.has_value()) {
widget.load_from_file(path.value());
}
});
auto delete_action = GUI::CommonActions::make_delete_action(
[&](auto&) {
auto path = widget.path();
if (path.is_empty())
return;
auto msgbox_result = GUI::MessageBox::show(window,
String::formatted("Really delete {}?", path),
"Confirm deletion",
GUI::MessageBox::Type::Warning,
GUI::MessageBox::InputType::OKCancel);
if (msgbox_result == GUI::MessageBox::ExecCancel)
return;
if (unlink(widget.path().characters()) < 0) {
int saved_errno = errno;
GUI::MessageBox::show(window,
String::formatted("unlink({}) failed: {}", path, strerror(saved_errno)),
"Delete failed",
GUI::MessageBox::Type::Error);
return;
}
widget.clear();
});
auto quit_action = GUI::CommonActions::make_quit_action(
[&](auto&) {
app->quit();
});
auto rotate_left_action = GUI::Action::create("Rotate &Left", { Mod_None, Key_L },
[&](auto&) {
widget.rotate(Gfx::RotationDirection::Left);
});
auto rotate_right_action = GUI::Action::create("Rotate &Right", { Mod_None, Key_R },
[&](auto&) {
widget.rotate(Gfx::RotationDirection::Right);
});
auto vertical_flip_action = GUI::Action::create("Flip &Vertically", { Mod_None, Key_V },
[&](auto&) {
widget.flip(Gfx::Orientation::Vertical);
});
auto horizontal_flip_action = GUI::Action::create("Flip &Horizontally", { Mod_None, Key_H },
[&](auto&) {
widget.flip(Gfx::Orientation::Horizontal);
});
auto desktop_wallpaper_action = GUI::Action::create("Set as Desktop &Wallpaper",
[&](auto&) {
GUI::Desktop::the().set_wallpaper(widget.path());
});
auto go_first_action = GUI::Action::create("Go to &First", { Mod_None, Key_Home }, Gfx::Bitmap::load_from_file("/res/icons/16x16/go-first.png"),
[&](auto&) {
widget.navigate(QSWidget::Directions::First);
});
auto go_back_action = GUI::Action::create("Go &Back", { Mod_None, Key_Left }, Gfx::Bitmap::load_from_file("/res/icons/16x16/go-back.png"),
[&](auto&) {
widget.navigate(QSWidget::Directions::Back);
});
auto go_forward_action = GUI::Action::create("Go &Forward", { Mod_None, Key_Right }, Gfx::Bitmap::load_from_file("/res/icons/16x16/go-forward.png"),
[&](auto&) {
widget.navigate(QSWidget::Directions::Forward);
});
auto go_last_action = GUI::Action::create("Go to &Last", { Mod_None, Key_End }, Gfx::Bitmap::load_from_file("/res/icons/16x16/go-last.png"),
[&](auto&) {
widget.navigate(QSWidget::Directions::Last);
});
auto full_sceen_action = GUI::CommonActions::make_fullscreen_action(
[&](auto&) {
widget.on_doubleclick();
});
auto zoom_in_action = GUI::Action::create("Zoom &In", { Mod_None, Key_Plus }, Gfx::Bitmap::load_from_file("/res/icons/16x16/zoom-in.png"),
[&](auto&) {
widget.set_scale(widget.scale() + 10);
});
auto zoom_reset_action = GUI::Action::create("Zoom to &100%", { Mod_None, Key_0 }, Gfx::Bitmap::load_from_file("/res/icons/16x16/zoom-reset.png"),
[&](auto&) {
widget.set_scale(100);
});
auto zoom_out_action = GUI::Action::create("Zoom &Out", { Mod_None, Key_Minus }, Gfx::Bitmap::load_from_file("/res/icons/16x16/zoom-out.png"),
[&](auto&) {
widget.set_scale(widget.scale() - 10);
});
auto hide_show_toolbar_action = GUI::Action::create("Hide/Show &Toolbar", { Mod_Ctrl, Key_T },
[&](auto&) {
toolbar_container.set_visible(!toolbar_container.is_visible());
});
auto copy_action = GUI::CommonActions::make_copy_action([&](auto&) {
if (widget.bitmap())
GUI::Clipboard::the().set_bitmap(*widget.bitmap());
});
main_toolbar.add_action(open_action);
main_toolbar.add_action(delete_action);
main_toolbar.add_separator();
main_toolbar.add_action(go_first_action);
main_toolbar.add_action(go_back_action);
main_toolbar.add_action(go_forward_action);
main_toolbar.add_action(go_last_action);
main_toolbar.add_separator();
main_toolbar.add_action(zoom_in_action);
main_toolbar.add_action(zoom_reset_action);
main_toolbar.add_action(zoom_out_action);
auto menubar = GUI::Menubar::construct();
auto& file_menu = menubar->add_menu("&File");
file_menu.add_action(open_action);
file_menu.add_action(delete_action);
file_menu.add_separator();
file_menu.add_action(quit_action);
auto& image_menu = menubar->add_menu("&Image");
image_menu.add_action(rotate_left_action);
image_menu.add_action(rotate_right_action);
image_menu.add_action(vertical_flip_action);
image_menu.add_action(horizontal_flip_action);
image_menu.add_separator();
image_menu.add_action(desktop_wallpaper_action);
auto& navigate_menu = menubar->add_menu("&Navigate");
navigate_menu.add_action(go_first_action);
navigate_menu.add_action(go_back_action);
navigate_menu.add_action(go_forward_action);
navigate_menu.add_action(go_last_action);
auto& view_menu = menubar->add_menu("&View");
view_menu.add_action(full_sceen_action);
view_menu.add_separator();
view_menu.add_action(zoom_in_action);
view_menu.add_action(zoom_reset_action);
view_menu.add_action(zoom_out_action);
view_menu.add_separator();
view_menu.add_action(hide_show_toolbar_action);
auto& help_menu = menubar->add_menu("&Help");
help_menu.add_action(GUI::CommonActions::make_help_action([](auto&) {
Desktop::Launcher::open(URL::create_with_file_protocol("/usr/share/man/man1/ImageViewer.md"), "/bin/Help");
}));
help_menu.add_action(GUI::CommonActions::make_about_action("Image Viewer", app_icon, window));
window->set_menubar(move(menubar));
if (path != nullptr) {
widget.load_from_file(path);
}
window->show();
return app->exec();
}