DesignerForm.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWebControlsDesign / System / Data / WebControls / Design / Util / DesignerForm.cs / 1305376 / DesignerForm.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//----------------------------------------------------------------------------- 

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

namespace System.Web.UI.Design.WebControls.Util
{
    ///  
    /// Represents a form used by a designer.
    ///  
    internal abstract class DesignerForm : Form 
    {
        private const int SC_CONTEXTHELP = 0xF180; 
        private const int WM_SYSCOMMAND = 0x0112;

        private IServiceProvider _serviceProvider;
        private bool _firstActivate; 
#if DEBUG
        private bool _formInitialized; 
#endif 

        ///  
        /// Creates a new DesignerForm with a given service provider.
        /// 
        protected DesignerForm(IServiceProvider serviceProvider)
        { 
            Debug.Assert(serviceProvider != null);
            _serviceProvider = serviceProvider; 
 
            _firstActivate = true;
        } 

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

        ///  
        /// Frees up resources.
        ///  
        protected override void Dispose(bool disposing) 
        {
            if (disposing) 
            {
                _serviceProvider = null;
            }
            base.Dispose(disposing); 
        }
 
        protected void InitializeForm() 
        {
            Font dialogFont = UIHelper.GetDialogFont(ServiceProvider); 
            if (dialogFont != null)
            {
                Font = dialogFont;
            } 

            // Set RightToLeft mode based on resource file 
            string rtlText = Strings.RTL; 
            if (!String.Equals(rtlText, "RTL_False", StringComparison.Ordinal))
            { 
                RightToLeft = RightToLeft.Yes;
                RightToLeftLayout = true;
            }
 
#pragma warning disable 618
            AutoScaleBaseSize = new System.Drawing.Size(5, 14); 
#pragma warning restore 618 
            HelpButton = true;
            MinimizeBox = false; 
            MaximizeBox = false;
            ShowIcon = false;
            ShowInTaskbar = false;
            FormBorderStyle = FormBorderStyle.Sizable; 
            SizeGripStyle = System.Windows.Forms.SizeGripStyle.Show;
            StartPosition = System.Windows.Forms.FormStartPosition.CenterParent; 
            MinimumSize = Size; 
#if DEBUG
            _formInitialized = true; 
#endif
        }

        ///  
        /// Gets a service of the desired entitySetNameItem. Returns null if the service does not exist or there is no service provider.
        ///  
        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);
            } 
        } 

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

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

        ///  
        /// Raised upon first activation of the form. 
        /// 
        ///  
        protected virtual void OnInitialActivated(EventArgs e)
        {
#if DEBUG
            Debug.Assert(_formInitialized, "All classes deriving from DesignerForm must call InitializeForm() from within InitializeComponent()."); 
#endif
        } 
 
        /// 
        /// Launches the help for this form. 
        /// 
        private void ShowHelp()
        {
            if (ServiceProvider != null) 
            {
                IHelpService helpService = (IHelpService)ServiceProvider.GetService(typeof(IHelpService)); 
                if (helpService != null) 
                {
                    helpService.ShowHelpFromKeyword(HelpTopic); 
                }
            }
        }
 
        /// 
        /// Overridden to reroute the context-help button to our own handler. 
        ///  
        protected override void WndProc(ref Message m)
        { 
            if ((m.Msg == WM_SYSCOMMAND) && ((int)m.WParam == SC_CONTEXTHELP))
            {
                ShowHelp();
                return; 
            }
            else 
            { 
                base.WndProc(ref m);
            } 
        }
    }
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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DesignerForm.cs source code in C# .NET

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