ControlAdapter.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Adapters / ControlAdapter.cs / 1305376 / ControlAdapter.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System; 
using System.Globalization; 
using System.IO;
using System.Web; 
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.Mobile;
using RootMobile = System.Web.Mobile; 
using System.Web.UI.MobileControls;
using System.Collections; 
using System.Collections.Specialized; 
using System.Text;
using System.Security.Permissions; 

// We don't recompile this base class in the shipped source samples, as it
// accesses some internal functionality and is a core utility (rather than an
// extension itself). 
#if !COMPILING_FOR_SHIPPED_SOURCE
 
namespace System.Web.UI.MobileControls.Adapters 
{
 
    /*
     * ControlAdapter base class.
     *
     * Copyright (c) 2000 Microsoft Corporation 
     */
    ///  
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [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.")] 
    public abstract class ControlAdapter : IControlAdapter
    {
        private static readonly String[] LabelIDs = new String[] {
                                                RootMobile.SR.ControlAdapter_BackLabel, 
                                                RootMobile.SR.ControlAdapter_GoLabel,
                                                RootMobile.SR.ControlAdapter_OKLabel, 
                                                RootMobile.SR.ControlAdapter_MoreLabel, 
                                                RootMobile.SR.ControlAdapter_OptionsLabel,
                                                RootMobile.SR.ControlAdapter_NextLabel, 
                                                RootMobile.SR.ControlAdapter_PreviousLabel,
                                                RootMobile.SR.ControlAdapter_LinkLabel,
                                                RootMobile.SR.ControlAdapter_PhoneCallLabel
                                           }; 

        ///  
        protected static readonly int BackLabel     = 0; 
        /// 
        protected static readonly int GoLabel       = 1; 
        /// 
        protected static readonly int OKLabel       = 2;
        /// 
        protected static readonly int MoreLabel     = 3; 
        /// 
        protected static readonly int OptionsLabel  = 4; 
        ///  
        protected static readonly int NextLabel     = 5;
        ///  
        protected static readonly int PreviousLabel = 6;
        /// 
        protected static readonly int LinkLabel     = 7;
        ///  
        protected static readonly int CallLabel     = 8;
 
        private MobileControl _control; 

        ///  
        public MobileControl Control
        {
            get
            { 
                return _control;
            } 
            set 
            {
                _control = value; 
            }
        }

        ///  
        public virtual MobilePage Page
        { 
            get 
            {
                return Control.MobilePage; 
            }
            set
            {
                // Do not expect to be called directly.  Subclasses should 
                // override this when needed.
                throw new Exception( 
                    SR.GetString( 
                        SR.ControlAdapterBasePagePropertyShouldNotBeSet));
            } 
        }

        /// 
        public virtual MobileCapabilities Device 
        {
            get 
            { 
                return (MobileCapabilities)Page.Request.Browser;
            } 
        }

        /// 
        public virtual void OnInit(EventArgs e){} 
        /// 
        public virtual void OnLoad(EventArgs e){} 
        ///  
        public virtual void OnPreRender(EventArgs e){}
 
        /// 
        public virtual void Render(HtmlTextWriter writer)
        {
            RenderChildren(writer); 
        }
 
        ///  
        public virtual void OnUnload(EventArgs e){}
 
        /// 
        public virtual bool HandlePostBackEvent(String eventArgument)
        {
            return false; 
        }
 
        // By default, always return false, so the control itself will handle 
        // it.
        ///  
        public virtual bool LoadPostData(String key,
                                         NameValueCollection data,
                                         Object controlPrivateData,
                                         out bool dataChanged) 
        {
            dataChanged = false; 
            return false; 
        }
 
        /// 
        public virtual void LoadAdapterState(Object state)
        {
        } 

        ///  
        public virtual Object SaveAdapterState() 
        {
            return null; 
        }

        /// 
        public virtual void CreateTemplatedUI(bool doDataBind) 
        {
            // No device specific templated UI to create. 
 
            Control.CreateDefaultTemplatedUI(doDataBind);
        } 

        //  convenience methods here
        /// 
        public Style Style 
        {
            get 
            { 
                return Control.Style;
            } 
        }

        /// 
        protected void RenderChildren(HtmlTextWriter writer) 
        {
            if (Control.HasControls()) 
            { 
                foreach (Control child in Control.Controls)
                { 
                    child.RenderControl(writer);
                }
            }
        } 

        ///  
        public virtual int VisibleWeight 
        {
            get 
            {
                return ControlPager.UseDefaultWeight;
            }
        } 

        ///  
        public virtual int ItemWeight 
        {
            get 
            {
                return ControlPager.UseDefaultWeight;
            }
        } 

        // The following method is used by PageAdapter subclasses of 
        // ControlAdapter for determining the optimum page weight for 
        // a given device.  Algorithm is as follows:
        //     1) First look for the "optimumPageWeight" parameter set 
        //        for the device.  If it exists, and can be converted
        //        to an integer, use it.
        //     2) Otherwise, look for the "screenCharactersHeight" parameter.
        //        If it exists, and can be converted to an integer, multiply 
        //        it by 100 and use the result.
        //     3) As a last resort, use the default provided by the calling 
        //        PageAdapter. 
        /// 
        protected virtual int CalculateOptimumPageWeight(int defaultPageWeight) 
        {
            int optimumPageWeight = 0;

            // Pull OptimumPageWeight from the web.config parameter of the same 
            // name, when present.
            String pageWeight = Device[Constants.OptimumPageWeightParameter]; 
 
            if (pageWeight != null)
            { 
                try
                {
                    optimumPageWeight = Convert.ToInt32(pageWeight, CultureInfo.InvariantCulture);
                } 
                catch
                { 
                    optimumPageWeight = 0; 
                }
            } 

            if (optimumPageWeight <= 0)
            {
                // If OptimumPageWeight isn't established explicitly, attempt to 
                // construct it as 100 * number of lines of characters.
                String numLinesStr = Device[Constants.ScreenCharactersHeightParameter]; 
                if (numLinesStr != null) 
                {
                    try 
                    {
                        int numLines = Convert.ToInt32(numLinesStr, CultureInfo.InvariantCulture);
                        optimumPageWeight = 100 * numLines;
                    } 
                    catch
                    { 
                        optimumPageWeight = 0; 
                    }
                } 
            }

            if (optimumPageWeight <= 0)
            { 
                optimumPageWeight = defaultPageWeight;
            } 
 
            return optimumPageWeight;
        } 

        private String[] _defaultLabels = null;

        ///  
        protected String GetDefaultLabel(int labelID)
        { 
            if ((labelID < 0) || (labelID >= LabelIDs.Length)) 
            {
                throw new ArgumentException(System.Web.Mobile.SR.GetString( 
                                                System.Web.Mobile.SR.ControlAdapter_InvalidDefaultLabel));
            }

            MobilePage page = Page; 
            if (page != null)
            { 
                ControlAdapter pageAdapter = (ControlAdapter)page.Adapter; 
                if (pageAdapter._defaultLabels == null)
                { 
                    pageAdapter._defaultLabels = new String[LabelIDs.Length];
                }

                String labelValue = pageAdapter._defaultLabels[labelID]; 
                if (labelValue == null)
                { 
                    labelValue = System.Web.Mobile.SR.GetString(LabelIDs[labelID]); 
                    pageAdapter._defaultLabels[labelID] = labelValue;
                } 

                return labelValue;
            }
            else 
            {
                return System.Web.Mobile.SR.GetString(LabelIDs[labelID]); 
            } 
        }
    } 

    [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 class EmptyControlAdapter : ControlAdapter {
        internal EmptyControlAdapter() {} 
    }
 
} 

#endif 

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

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