gomasch Development Notes

    /// <summary>
    /// purpose: helper class to save form size+location with .Net 2.0 application settings
    /// 
    /// usage:
    ///  1. create two settings values e.g.
    ///    -named "Size" of type "System.Drawing.Size" and set a default value
    ///    -named "Location" of type "System.Drawing.Point" and set a default value
    ///  2. call ctor: 
    ///      new SaveFormSizeInSettings(this, "Size", "Location" MyNamespace.Properties.Settings.Default)
    ///      BEFORE InitializeComponent()!!!!
    ///  3. call MyNamespace.Properties.Settings.Default.Save() in form_Closing
    /// </summary>
    public class SaveFormSizeInSettings
    {
        private Form form;
        private System.Configuration.ApplicationSettingsBase settings;
        private string sizeValueName;
        private string locationValueName;

        /// <summary>
        /// ctor
        /// </summary>
        /// <param name="form"></param>
        /// <param name="sizeValueName"></param>
        /// <param name="locationValueName"></param>
        /// <param name="settings"></param>
        public SaveFormSizeInSettings(Form form, string sizeValueName, string locationValueName, System.Configuration.ApplicationSettingsBase settings)
        {
            this.form = form;
            this.settings = settings;
            this.sizeValueName = sizeValueName;
            this.locationValueName = locationValueName;

            form.FormClosing += new FormClosingEventHandler(form_FormClosing);
            form.Load += new EventHandler(form_Load);
        }

        void form_Load(object sender, EventArgs e)
        {
            if ((null == settings[sizeValueName]) ||
                (null == settings[locationValueName]))
            {    // size or location not yet in settings
                return;
            }

            Size savedSize = (System.Drawing.Size)settings[sizeValueName];
            Point savedLocation = (System.Drawing.Point)settings[locationValueName];

            if (Screen.FromControl(form).Bounds.Contains(new Rectangle(savedLocation, savedSize)))
            {    // fits into current screen
                form.Size = savedSize;
                form.Location = savedLocation;
            }
        }

        void form_FormClosing(object sender, FormClosingEventArgs e)
        {
            //size
            if (form.WindowState == FormWindowState.Normal)
            {
                settings[sizeValueName] = form.Size;
            }
            else
            {
                settings[sizeValueName] = form.RestoreBounds.Size;
            }

            // location
            settings[locationValueName] = form.Location;
        }
    }