FeedCenter/Application/MainWindow/WindowHandler.cs

using DebounceThrottle;
using FeedCenter.Properties;
using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Interop;
using System.Windows.Media;

namespace FeedCenter;

public partial class MainWindow
{
    private void LoadWindowSettings()
    {
        // Get the last window location
        var windowLocation = Settings.Default.WindowLocation;

        // Set the window into position
        Left = windowLocation.X;
        Top = windowLocation.Y;

        // Get the last window size
        var windowSize = Settings.Default.WindowSize;

        // Set the window into the previous size if it is valid
        if (!windowSize.Width.Equals(0) && !windowSize.Height.Equals(0))
        {
            Width = windowSize.Width;
            Height = windowSize.Height;
        }

        // Set the location of the navigation tray
        switch (Settings.Default.ToolbarLocation)
        {
            case Dock.Top:
                NameBasedGrid.NameBasedGrid.SetRow(NavigationToolbarTray, "TopToolbarRow");
                break;
            case Dock.Bottom:
                NameBasedGrid.NameBasedGrid.SetRow(NavigationToolbarTray, "BottomToolbarRow");
                break;
        }

        // Load the lock state
        HandleWindowLockState();
    }

    private void SaveWindowSettings()
    {
        // Set the last window location
        Settings.Default.WindowLocation = new Point(Left, Top);
        Settings.Default.Save();

        // Set the last window size
        Settings.Default.WindowSize = new Size(Width, Height);
        Settings.Default.Save();

        // Save the dock on the navigation tray
        Settings.Default.ToolbarLocation = NameBasedGrid.NameBasedGrid.GetRow(NavigationToolbarTray) == "TopToolbarRow" ? Dock.Top : Dock.Bottom;
        Settings.Default.Save();
    }

    private void HandleWindowLockState()
    {
        // Set the resize mode for the window
        ResizeMode = Settings.Default.WindowLocked ? ResizeMode.NoResize : ResizeMode.CanResize;

        // Show or hide the border
        WindowBorder.BorderBrush = Settings.Default.WindowLocked ? SystemColors.ActiveBorderBrush : Brushes.Transparent;

        // Update the borders
        UpdateBorder();
    }

    protected override void OnClosing(CancelEventArgs e)
    {
        base.OnClosing(e);

        // Get rid of the timer
        TerminateTimer();

        // Save current window settings
        SaveWindowSettings();

        // Save settings
        _database.SaveChanges(Settings.Default.Save);

        // Get rid of the notification icon
        NotificationIcon.Dispose();
    }

    private readonly DebounceDispatcher _updateWindowSettingsDispatcher = new(TimeSpan.FromMilliseconds(500));

    private void HandleWindowSizeChanged(object sender, SizeChangedEventArgs e)
    {
        _updateWindowSettingsDispatcher.Debounce(() => Dispatcher.Invoke(UpdateWindowSettings));
    }

    private void HandleWindowLocationChanged(object sender, EventArgs e)
    {
        _updateWindowSettingsDispatcher.Debounce(() => Dispatcher.Invoke(UpdateWindowSettings));
    }

    private void UpdateBorder()
    {
        var windowInteropHelper = new WindowInteropHelper(this);

        var screen = WpfScreenHelper.Screen.FromHandle(windowInteropHelper.Handle);

        var rectangle = new Rect
        {
            X = Left,
            Y = Top,
            Width = Width,
            Height = Height
        };

        var borderThickness = new Thickness();

        if (!rectangle.Right.Equals(screen.WorkingArea.Right))
            borderThickness.Right = 1;

        if (!rectangle.Left.Equals(screen.WorkingArea.Left))
            borderThickness.Left = 1;

        if (!rectangle.Top.Equals(screen.WorkingArea.Top))
            borderThickness.Top = 1;

        if (!rectangle.Bottom.Equals(screen.WorkingArea.Bottom))
            borderThickness.Bottom = 1;

        WindowBorder.BorderThickness = borderThickness;
    }

    private void UpdateWindowSettings()
    {
        // Save current window settings
        SaveWindowSettings();

        // Update the border
        UpdateBorder();
    }

    private bool _activated;

    protected override void OnActivated(EventArgs e)
    {
        base.OnActivated(e);

        if (_activated)
            return;

        _activated = true;

        // Load the lock state
        HandleWindowLockState();

        // Watch for size and location changes
        SizeChanged += HandleWindowSizeChanged;
        LocationChanged += HandleWindowLocationChanged;

        // Watch for setting changes
        Settings.Default.PropertyChanged += HandlePropertyChanged;
    }
}