VeloeMinecraftLauncher/VeloeMinecraftLauncher/Views/TitleBar/TitleBarWindow.axaml.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.Shapes;
using Avalonia.Markup.Xaml;
using Avalonia.Media;
using Avalonia.VisualTree;
using System;
using System.Runtime.InteropServices;
using System.Threading.Tasks;

/*
MIT License

Original work Copyright (c) 2020 Fichtelcoder
Modified work Copyright 2022 Veloe Aetess

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

*/

#pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
namespace VeloeMinecraftLauncher.Views.TitleBar
{
    public partial class TitleBarWindow : UserControl
    {
        private Button minimizeButton;
        private Button maximizeButton;
        private Path maximizeIcon;
        private ToolTip maximizeToolTip;
        private Button closeButton;
        private Image windowIcon;

        private DockPanel titleBar;
        private DockPanel titleBarBackground;
        private TextBlock systemChromeTitle;
        private NativeMenuBar seamlessMenuBar;
        private NativeMenuBar defaultMenuBar;

        public static readonly StyledProperty<bool> IsSeamlessProperty =
        AvaloniaProperty.Register<TitleBarWindow, bool>(nameof(IsSeamless));

        public static readonly StyledProperty<bool> IsIconVisibleProperty =
        AvaloniaProperty.Register<TitleBarWindow, bool>(nameof(IsIconVisible));

        public static readonly StyledProperty<bool> IsMaximizeVisibleProperty =
        AvaloniaProperty.Register<TitleBarWindow, bool>(nameof(IsMaximizeVisible));

        public static readonly StyledProperty<string> TitleProperty =
        AvaloniaProperty.Register<TitleBarWindow, string>(nameof(TitleText));

        public bool IsSeamless
        {
            get { return GetValue(IsSeamlessProperty); }
            set
            {
                SetValue(IsSeamlessProperty, value);
                if (titleBarBackground != null &&
                    systemChromeTitle != null &&
                    seamlessMenuBar != null &&
                    defaultMenuBar != null)
                {
                    titleBarBackground.IsVisible = IsSeamless ? false : true;
                    systemChromeTitle.IsVisible = IsSeamless ? false : true;
                    seamlessMenuBar.IsVisible = IsSeamless ? true : false;
                    defaultMenuBar.IsVisible = IsSeamless ? false : true;

                    if (IsSeamless == false)
                    {
                        //titleBar.Resources["SystemControlForegroundBaseHighBrush"] = new SolidColorBrush { Color = new Color(255, 0, 0, 0) };
                    }
                }
            }
        }

        public bool IsIconVisible
        {
            get { return GetValue(IsIconVisibleProperty); }
            set
            {
                SetValue(IsIconVisibleProperty, value);
                if (windowIcon != null
                    )
                {
                    windowIcon.IsVisible = IsIconVisible ? true : false;
                    //systemChromeTitle.IsVisible = IsIconVisible ? true : false;
                }
            }
        }

        public bool IsMaximizeVisible
        {
            get { return GetValue(IsIconVisibleProperty); }
            set
            {
                SetValue(IsIconVisibleProperty, value);
                if (maximizeButton != null &&
                    maximizeIcon != null &&
                    maximizeToolTip != null)
                {
                    maximizeButton.IsVisible = IsIconVisible ? true : false;
                    maximizeIcon.IsVisible = IsIconVisible ? true : false;
                    maximizeToolTip.IsVisible = IsIconVisible ? true : false;
                }
            }
        }

        public string TitleText
        {
            get
            {
                if (systemChromeTitle != null)
                    return systemChromeTitle.Text;
                return "";
            }
            set
            {
                if (systemChromeTitle != null)
                    systemChromeTitle.Text = value;
            }
        }

        public TitleBarWindow()

        {
            this.InitializeComponent();

            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) == false)
            {
                this.IsVisible = false;
            }
            else
            {
                minimizeButton = this.FindControl<Button>("MinimizeButton");
                maximizeButton = this.FindControl<Button>("MaximizeButton");
                maximizeIcon = this.FindControl<Path>("MaximizeIcon");
                maximizeToolTip = this.FindControl<ToolTip>("MaximizeToolTip");
                closeButton = this.FindControl<Button>("CloseButton");
                windowIcon = this.FindControl<Image>("WindowIcon");

                minimizeButton.Click += MinimizeWindow;
                maximizeButton.Click += MaximizeWindow;
                closeButton.Click += CloseWindow;
                windowIcon.DoubleTapped += CloseWindow;

                titleBar = this.FindControl<DockPanel>("TitleBar");
                titleBarBackground = this.FindControl<DockPanel>("TitleBarBackground");
                systemChromeTitle = this.FindControl<TextBlock>("SystemChromeTitle");
                seamlessMenuBar = this.FindControl<NativeMenuBar>("SeamlessMenuBar");
                defaultMenuBar = this.FindControl<NativeMenuBar>("DefaultMenuBar");

                SubscribeToWindowState();
            }
        }

        private void CloseWindow(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            (this.GetVisualRoot() as Window)?.Close();
        }

        private void MaximizeWindow(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            Window? hostWindow = this.GetVisualRoot() as Window;

            if (hostWindow is null) return;

            if (hostWindow.WindowState == WindowState.Normal)
            {
                hostWindow.WindowState = WindowState.Maximized;
            }
            else
            {
                hostWindow.WindowState = WindowState.Normal;
            }
        }

        private void MinimizeWindow(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            Window? hostWindow = this.GetVisualRoot() as Window;

            if (hostWindow is null) return;

            hostWindow.WindowState = WindowState.Minimized;
        }

        private async void SubscribeToWindowState()
        {
            Window? hostWindow = this.GetVisualRoot() as Window;

            while (hostWindow == null)
            {
                hostWindow = this.GetVisualRoot() as Window;
                await Task.Delay(50);
            }

            hostWindow.GetObservable(Window.WindowStateProperty).Subscribe(s =>
            {
                if (s != WindowState.Maximized)
                {
                    maximizeIcon.Data = Geometry.Parse("M2048 2048v-2048h-2048v2048h2048zM1843 1843h-1638v-1638h1638v1638z");
                    hostWindow.Padding = new Thickness(0, 0, 0, 0);
                    maximizeToolTip.Content = "Maximize";
                }
                if (s == WindowState.Maximized)
                {
                    maximizeIcon.Data = Geometry.Parse("M2048 1638h-410v410h-1638v-1638h410v-410h1638v1638zm-614-1024h-1229v1229h1229v-1229zm409-409h-1229v205h1024v1024h205v-1229z");
                    hostWindow.Padding = new Thickness(7, 7, 7, 7);
                    maximizeToolTip.Content = "Restore Down";

                    // This should be a more universal approach in both cases, but I found it to be less reliable, when for example double-clicking the title bar.
                    /*hostWindow.Padding = new Thickness(
                            hostWindow.OffScreenMargin.Left,
                            hostWindow.OffScreenMargin.Top,
                            hostWindow.OffScreenMargin.Right,
                            hostWindow.OffScreenMargin.Bottom);*/
                }
            });
        }

        private void InitializeComponent()
        {
            AvaloniaXamlLoader.Load(this);
        }
    }

}
#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.