Resizing Controls At runtime

Question

Does anybody know of any sample code laying around anywhere that would enable me to resize a picturebox at runtime when the mouse cursor is draging the bottom right edge of

Answer 1

You can use Use this "home made" class. For a correct functioning you shuld have a container and a resizer element inside it, like a thin image working as a resizing border. The controlToResize is the container itself. You can put all you want inside the control. Example:

ControlResizer.Init(myPictureBox, myTableLayoutPanel, ControlResizer.Direction.Vertical, Cursors.SizeNS);

Here is the class.

class ControlResizer
{
    public enum Direction
    {
        Horizontal,
        Vertical
    }

    public static void Init(Control resizer, Control controlToResize, Direction direction, Cursor cursor)
    {
        bool dragging = false;
        Point dragStart = Point.Empty;
        int maxBound;
        int minBound;

        resizer.MouseHover += delegate(object sender, EventArgs e)
        {
            resizer.Cursor = cursor;
        };

        resizer.MouseDown += delegate(object sender, MouseEventArgs e)
        {
            dragging = true;
            dragStart = new Point(e.X, e.Y);
            resizer.Capture = true;
        };

        resizer.MouseUp += delegate(object sender, MouseEventArgs e)
        {
            dragging = false;
            resizer.Capture = false;
        };

        resizer.MouseMove += delegate(object sender, MouseEventArgs e)
        {
            if (dragging)
            {
                if (direction == Direction.Vertical)
                {
                    minBound = resizer.Height;
                    maxBound = controlToResize.Parent.Height - controlToResize.Top - 20;
                    controlToResize.Height = Math.Min(maxBound , Math.Max(minBound, controlToResize.Height + (e.Y - dragStart.Y)) );
                }
                if (direction == Direction.Horizontal)
                {
                    minBound = resizer.Width;
                    maxBound = controlToResize.Parent.Width - controlToResize.Left - 20;
                    controlToResize.Width = Math.Min(maxBound, Math.Max(minBound, controlToResize.Width + (e.X - dragStart.X)));
                }
            }
        };
    }
}