CheckableControlBaseAdapter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / ButtonInternal / CheckableControlBaseAdapter.cs / 1 / CheckableControlBaseAdapter.cs
                        

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

namespace System.Windows.Forms.ButtonInternal { 
    using System; 
    using System.Diagnostics;
    using System.Drawing; 
    using System.Drawing.Drawing2D;
    using System.Drawing.Imaging;
    using System.Drawing.Text;
    using System.Windows.Forms; 

    ///  
    ///     Common class for RadioButtonBaseAdapter and CheckBoxBaseAdapter 
    /// 
    internal abstract class CheckableControlBaseAdapter   : ButtonBaseAdapter { 
        private const int standardCheckSize = 13;
        private ButtonBaseAdapter buttonAdapter;

        internal CheckableControlBaseAdapter(ButtonBase control) : base(control) {} 

        protected ButtonBaseAdapter ButtonAdapter { 
            get { 
                if (buttonAdapter == null) {
                    buttonAdapter = CreateButtonAdapter(); 
                }
                return buttonAdapter;
            }
        } 

        internal override Size GetPreferredSizeCore(Size proposedSize) { 
            if (Appearance == Appearance.Button) { 
                return ButtonAdapter.GetPreferredSizeCore(proposedSize);
            } 

            using (Graphics measurementGraphics = WindowsFormsUtils.CreateMeasurementGraphics()) {
                using (PaintEventArgs pe = new PaintEventArgs(measurementGraphics, new Rectangle())) {
                    LayoutOptions options = Layout(pe); 
                    return options.GetPreferredSizeCore(proposedSize);
                } 
            } 
        }
 
        protected abstract ButtonBaseAdapter CreateButtonAdapter();

        private Appearance Appearance {
            get { 
                CheckBox checkBox = Control as CheckBox;
                if(checkBox != null) { 
                    return checkBox.Appearance; 
                }
 
                RadioButton radioButton = Control as RadioButton;
                if(radioButton != null) {
                    return radioButton.Appearance;
                } 

                Debug.Fail("Unexpected control type '" + Control.GetType().FullName + "'"); 
                return Appearance.Normal; 
            }
        } 

        internal override LayoutOptions CommonLayout() {
            LayoutOptions layout = base.CommonLayout();
            layout.growBorderBy1PxWhenDefault = false; 
            layout.borderSize        = 0;
            layout.paddingSize       = 0; 
            layout.maxFocus          = false; 
            layout.focusOddEvenFixup = true;
            layout.checkSize         = standardCheckSize; 
            return layout;
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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