MiniClock/main.cpp at main · bugaevm/MiniClock · GitHub

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/* SPDX-License-Identifier: CC0-1.0 */

#include <peel/Adw/Adw.h>
#include <peel/GLib/MainContext.h>
#include <peel/Gtk/WindowHandle.h>
#include <peel/Adw/ToolbarView.h>
#include <peel/Adw/HeaderBar.h>
#include <peel/Gtk/Label.h>
#include <peel/GLib/DateTime.h>
#include <peel/GLib/functions.h>
#include <peel/GLib/Source.h>

using namespace peel;

static void on_waking_up(Gtk::Label *label, unsigned *source_id) {
    auto time = GLib::DateTime::create_now_local();
    char buffer[10];
    snprintf(buffer, sizeof(buffer), "%02d\n%02d", time->get_hour(), time->get_minute());
    label->set_label(buffer);

    int time_span = (60 - time->get_second()) * 1000 - time->get_microsecond() / 1000 + 1;  // in milliseconds
    *source_id = GLib::timeout_add_once(
        time_span,
        [label, source_id]() {
            on_waking_up(label, source_id);
        }
    );
}

int main() {
    Adw::init();

    GLib::MainContext *main_context = GLib::MainContext::default_();

    auto label = Gtk::Label::create("00\n00");
    label->add_css_class("numeric");
    label->set_margin_bottom(30);

    auto attr_list = Pango::AttrList::from_string("0 -1 font-desc \"100\", 0 -1 weight 100");
    label->set_attributes(attr_list);

    unsigned source_id;
    on_waking_up(label, &source_id);

    auto handle = Gtk::WindowHandle::create();
    handle->set_child(std::move(label));

    auto view = Adw::ToolbarView::create();
    view->set_content(std::move(handle));

    auto top_bar = Adw::HeaderBar::create();
    view->add_top_bar(std::move(top_bar));

    bool should_stop = false;
    Adw::Window *window = Adw::Window::create();
    window->connect_destroy (
        [&should_stop, &source_id] (Gtk::Widget *)
        {
            should_stop = true;
            GLib::Source::remove(source_id);
        }
    );
    window->set_content(std::move(view));
    window->present();

    while (!should_stop) {
        main_context->iteration(true);
    }
}