DesignerForm.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WebForms / System / Web / UI / Design / Util / DesignerForm.cs / 1 / DesignerForm.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.Design.Util { 
 
    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;
 
    /*


 

 
 

 
*/

    /// 
    /// 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 = UIServiceHelper.GetDialogFont(ServiceProvider);
            if (dialogFont != null) {
                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; 
                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;
            StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
#if DEBUG 
            _formInitialized = true;
#endif 
        } 

        ///  
        /// Gets a service of the desired type. 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.
// Copyright (c) Microsoft Corporation. All rights reserved.

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