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Userland: Implement a magnifier app

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This utility is useful for making sure those UI elements are pixel
perfect. A simple 2x/4x magnification around the mouse cursor, shown in
a window.
This commit is contained in:
Valtteri Koskivuori 2021-05-10 00:15:35 +03:00 • committed by Linus Groh
parent 4864ef9440
commit 4d01183f5c
6 changed files with 183 additions and 0 deletions
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89
Userland/Applications/Magnifier/main.cpp Normal file
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/*
* Copyright (c) 2021, Valtteri Koskivuori <vkoskiv@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "MagnifierWidget.h"
#include <LibGUI/ActionGroup.h>
#include <LibGUI/Application.h>
#include <LibGUI/Icon.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Menubar.h>
#include <LibGUI/Window.h>
#include <unistd.h>
int main(int argc, char** argv)
{
if (pledge("stdio cpath rpath recvfd sendfd unix fattr", nullptr) < 0) {
perror("pledge");
return 1;
}
auto app = GUI::Application::construct(argc, argv);
if (pledge("stdio cpath rpath recvfd sendfd", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/res", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil(nullptr, nullptr) < 0) {
perror("unveil");
return 1;
}
// Sneaky!
// FIXME: Doesn't have a 32x32 icon yet, need to make one!
auto app_icon = GUI::Icon::default_icon("find");
// 4px on each side for padding
constexpr int window_dimensions = 200 + 4 + 4;
auto window = GUI::Window::construct();
window->set_title("Magnifier");
window->resize(window_dimensions, window_dimensions);
window->set_resizable(false);
window->set_minimizable(false);
window->set_icon(app_icon.bitmap_for_size(16));
auto& magnifier = window->set_main_widget<MagnifierWidget>();
auto menubar = GUI::Menubar::construct();
auto& file_menu = menubar->add_menu("&File");
file_menu.add_action(GUI::CommonActions::make_quit_action([&](auto&) {
app->quit();
}));
auto size_action_group = make<GUI::ActionGroup>();
auto two_x_action = GUI::Action::create_checkable(
"&2x", [&](auto&) {
magnifier.set_scale_factor(2);
});
auto four_x_action = GUI::Action::create_checkable(
"&4x", [&](auto&) {
magnifier.set_scale_factor(4);
});
size_action_group->add_action(two_x_action);
size_action_group->add_action(four_x_action);
size_action_group->set_exclusive(true);
auto& view_menu = menubar->add_menu("&View");
view_menu.add_action(two_x_action);
view_menu.add_action(four_x_action);
two_x_action->set_checked(true);
auto& help_menu = menubar->add_menu("&Help");
help_menu.add_action(GUI::CommonActions::make_about_action("Magnifier", app_icon, window));
window->set_menubar(move(menubar));
window->show();
magnifier.track_cursor_globally();
magnifier.start_timer(16);
return app->exec();
}