Make WPF window draggable, no matter what element is clicked

Question

My question is 2 fold, and I am hoping there are easier solutions to both provided by WPF rather than the standard solutions from WinForms (which Christophe

Answer 1

As already mentioned by @fjch1997 it's convenient to implement a behavior. Here it is, the core logic is the same as in the @loi.efy's answer:

public class DragMoveBehavior : Behavior
{
    protected override void OnAttached()
    {
        AssociatedObject.MouseMove += AssociatedObject_MouseMove;
    }

    protected override void OnDetaching()
    {
        AssociatedObject.MouseMove -= AssociatedObject_MouseMove;
    }

    private void AssociatedObject_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.LeftButton == MouseButtonState.Pressed && sender is Window window)
        {
            // In maximum window state case, window will return normal state and
            // continue moving follow cursor
            if (window.WindowState == WindowState.Maximized)
            {
                window.WindowState = WindowState.Normal;

                // 3 or any where you want to set window location after
                // return from maximum state
                Application.Current.MainWindow.Top = 3;
            }

            window.DragMove();
        }
    }
}

Usage:

    
        
    
    ...