linux-packaging-mono/mcs/class/referencesource/System.Web.Mobile/UI/MobileControls/Design/DesignerForm.cs

//------------------------------------------------------------------------------
// <copyright file="DesignerForm.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
//------------------------------------------------------------------------------

namespace System.Web.UI.Design.MobileControls {

    using System;
    using System.Collections;
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Diagnostics;
    using System.Drawing;
    using System.Globalization;
    using System.Windows.Forms;
    using System.Windows.Forms.Design;
    using System.Web.UI.MobileControls;

    using Form = System.Windows.Forms.Form;

    /*
      







*/

    /// <devdoc>
    /// Represents a form used by a designer.
    /// </devdoc>
    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
    internal abstract class DesignerForm : Form {
        private const int SC_CONTEXTHELP = 0xF180;
        private const int WM_SYSCOMMAND = 0x0112;

        private IServiceProvider _serviceProvider;
        private bool _firstActivate;

        /// <devdoc>
        /// Creates a new DesignerForm with a given service provider.
        /// </devdoc>
        protected DesignerForm(IServiceProvider serviceProvider) {
            Debug.Assert(serviceProvider != null);
            _serviceProvider = serviceProvider;

            _firstActivate = true;

            IUIService uiService = (IUIService)GetService(typeof(IUIService));
            if (uiService != null) {
                IDictionary uiStyles = uiService.Styles;

                Font dialogFont = (Font)uiStyles["DialogFont"];
                Debug.Assert(dialogFont != null, "Did not get a dialog font to use from IUIService");

                Font = dialogFont;
            }

            // Set RightToLeft mode based on resource file
            string rtlText = SR.GetString(SR.RTL);
            if (!String.Equals(rtlText, "RTL_False", StringComparison.Ordinal)) {
                RightToLeft = RightToLeft.Yes;
            }

            HelpButton = true;
            MinimizeBox = false;
            MaximizeBox = false;
            ShowIcon = false;
            ShowInTaskbar = false;
            StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
        }

        /// <devdoc>
        /// The service provider for the form.
        /// </devdoc>
        protected internal IServiceProvider ServiceProvider {
            get {
                return _serviceProvider;
            }
        }

        /// <devdoc>
        /// Frees up resources.
        /// </devdoc>
        protected override void Dispose(bool disposing) {
            if (disposing) {
                _serviceProvider = null;
            }
            base.Dispose(disposing);
        }

        /// <devdoc>
        /// Gets a service of the desired type. Returns null if the service does not exist or there is no service provider.
        /// </devdoc>
        protected override object GetService(Type serviceType) {
            if (_serviceProvider != null) {
                return _serviceProvider.GetService(serviceType);
            }
            return null;
        }

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

            if (_firstActivate) {
                _firstActivate = false;
                OnInitialActivated(e);
            }
        }

        /// <devdoc>
        /// Returns the help topic for the form. Consult with your UE contact on
        /// what the appropriate help topic is for your dialog.
        /// </devdoc>
        protected abstract string HelpTopic {
            get;
        }

        protected sealed override void OnHelpRequested(HelpEventArgs hevent) {
            ShowHelp();
            hevent.Handled = true;
        }

        /// <summary>
        /// Raised upon first activation of the form.
        /// </summary>
        /// <param name="e"></param>
        protected virtual void OnInitialActivated(EventArgs e) {
        }

        /// <devdoc>
        /// Launches the help for this form.
        /// </devdoc>
        private void ShowHelp() {
            if (ServiceProvider != null) {
                IHelpService helpService = (IHelpService)ServiceProvider.GetService(typeof(IHelpService));
                if (helpService != null) {
                    helpService.ShowHelpFromKeyword(HelpTopic);
                }
            }
        }

        /// <devdoc>
        /// Overridden to reroute the context-help button to our own handler.
        /// </devdoc>
        protected override void WndProc(ref Message m) {
            if ((m.Msg == WM_SYSCOMMAND) && ((int)m.WParam == SC_CONTEXTHELP)) {
                ShowHelp();
                return;
            }
            else {
                base.WndProc(ref m);
            }
        }
    }
}