ToolStripComboBox.cs source code in C# .NET

                        
Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / WinForms / Managed / System / WinForms / ToolStripComboBox.cs / 1 / ToolStripComboBox.cs
                        

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

 
namespace System.Windows.Forms { 
    using System;
    using System.Drawing; 
    using System.Windows.Forms;
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Drawing.Design; 
    using System.Collections.Specialized;
    using System.Drawing.Drawing2D; 
    using System.Windows.Forms.Design; 
    using System.Security;
    using System.Security.Permissions; 
    using System.Runtime.InteropServices;
    using System.Windows.Forms.Internal;
    using System.Globalization;
 
    /// 
    ///  
    [ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.MenuStrip | ToolStripItemDesignerAvailability.ToolStrip | ToolStripItemDesignerAvailability.ContextMenuStrip)] 
    [DefaultProperty("Items")]
    public class ToolStripComboBox : ToolStripControlHost { 


        internal static readonly object EventDropDown                                    = new object();
        internal static readonly object EventDropDownClosed                              = new object(); 
        internal static readonly object EventDropDownStyleChanged                        = new object();
        internal static readonly object EventSelectedIndexChanged                        = new object(); 
        internal static readonly object EventSelectionChangeCommitted                    = new object(); 
        internal static readonly object EventTextUpdate                                   = new object();
 

        /// 
        public ToolStripComboBox() : base(CreateControlInstance()) {
            ToolStripComboBoxControl combo = Control as ToolStripComboBoxControl; 
            combo.Owner = this;
        } 
        public ToolStripComboBox(string name) : this() { 
            this.Name = name;
        } 


        /// 
        [EditorBrowsable(EditorBrowsableState.Never)] 
        public ToolStripComboBox(Control c) : base(c) {
            throw new NotSupportedException(SR.GetString(SR.ToolStripMustSupplyItsOwnComboBox)); 
        } 

        private static Control CreateControlInstance() { 
            ComboBox comboBox = new ToolStripComboBoxControl();
            comboBox.FlatStyle = FlatStyle.Popup;
            comboBox.Font = ToolStripManager.DefaultFont;
            return comboBox; 
        }
        ///  
        [ 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
        Localizable(true), 
        SRDescription(SR.ComboBoxAutoCompleteCustomSourceDescr),
        Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always)
        ] 
        public System.Windows.Forms.AutoCompleteStringCollection AutoCompleteCustomSource {
            get { return ComboBox.AutoCompleteCustomSource; } 
            set { ComboBox.AutoCompleteCustomSource = value;} 
        }
 
        /// 
        [
        DefaultValue(AutoCompleteMode.None),
        SRDescription(SR.ComboBoxAutoCompleteModeDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always)
        ] 
        public AutoCompleteMode AutoCompleteMode { 
            get { return ComboBox.AutoCompleteMode; }
            set { ComboBox.AutoCompleteMode = value;} 
        }

        /// 
        [ 
        DefaultValue(AutoCompleteSource.None),
        SRDescription(SR.ComboBoxAutoCompleteSourceDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always) 
        ]
        public AutoCompleteSource AutoCompleteSource { 
            get { return ComboBox.AutoCompleteSource; }
            set { ComboBox.AutoCompleteSource = value;}
        }
 
        [
        Browsable(false), 
        EditorBrowsable(EditorBrowsableState.Never), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        ] 
        public override Image BackgroundImage {
            get {
                return base.BackgroundImage;
            } 
            set {
                base.BackgroundImage = value; 
            } 
        }
 
        [
        Browsable(false),
        EditorBrowsable(EditorBrowsableState.Never),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) 
        ]
        public override ImageLayout BackgroundImageLayout { 
            get { 
                return base.BackgroundImageLayout;
            } 
            set {
                base.BackgroundImageLayout = value;
            }
        } 

        ///  
        [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] 
        public ComboBox ComboBox {
            get{ 
                return Control as ComboBox;
            }
        }
 
        /// 
        protected override Size DefaultSize { 
            get { 
                return new Size(100,22);
            } 
        }

        /// 
        ///  
        /// Deriving classes can override this to configure a default size for their control.
        /// This is more efficient than setting the size in the control's constructor. 
        ///  
        protected internal override Padding DefaultMargin {
            get { 
                if (IsOnDropDown) {
                    return new Padding(2);
                }
                else { 
                    return new Padding(1, 0, 1, 0);
                } 
            } 
        }
        [ 
        Browsable(false),
        EditorBrowsable(EditorBrowsableState.Never)
        ]
        public new event EventHandler DoubleClick { 
            add {
                base.DoubleClick+=value; 
            } 
            remove {
                base.DoubleClick -= value; 
            }
        }

        ///  
        [SRCategory(SR.CatBehavior), SRDescription(SR.ComboBoxOnDropDownDescr)]
        public event EventHandler DropDown { 
            add { 
                Events.AddHandler(EventDropDown, value);
            } 
            remove {
                Events.RemoveHandler(EventDropDown, value);
            }
        } 

         ///  
        [SRCategory(SR.CatBehavior), SRDescription(SR.ComboBoxOnDropDownClosedDescr)] 
        public event EventHandler DropDownClosed {
            add { 
                Events.AddHandler(EventDropDownClosed, value);
            }
            remove {
                Events.RemoveHandler(EventDropDownClosed, value); 
            }
        } 
        ///  
        [SRCategory(SR.CatBehavior), SRDescription(SR.ComboBoxDropDownStyleChangedDescr)]
        public event EventHandler DropDownStyleChanged { 
            add {
                Events.AddHandler(EventDropDownStyleChanged, value);
            }
            remove { 
                Events.RemoveHandler(EventDropDownStyleChanged, value);
            } 
        } 

 
        /// 
        [
        SRCategory(SR.CatBehavior),
        SRDescription(SR.ComboBoxDropDownHeightDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always),
        DefaultValue(106) 
        ] 
        public int DropDownHeight {
            get { return ComboBox.DropDownHeight; } 
            set { ComboBox.DropDownHeight = value;}

        }
 
        /// 
        [ 
        SRCategory(SR.CatAppearance), 
        DefaultValue(ComboBoxStyle.DropDown),
        SRDescription(SR.ComboBoxStyleDescr), 
        RefreshPropertiesAttribute(RefreshProperties.Repaint)
        ]
        public ComboBoxStyle DropDownStyle {
            get { return ComboBox.DropDownStyle; } 
            set { ComboBox.DropDownStyle = value;}
        } 
 
        /// 
        [ 
        SRCategory(SR.CatBehavior),
        SRDescription(SR.ComboBoxDropDownWidthDescr)
        ]
        public int DropDownWidth { 
            get { return ComboBox.DropDownWidth; }
            set { ComboBox.DropDownWidth = value;} 
        } 

        ///  
        [
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxDroppedDownDescr) 
        ]
        public bool DroppedDown { 
            get { return ComboBox.DroppedDown; } 
            set { ComboBox.DroppedDown = value;}
        } 

        /// 
        [
        SRCategory(SR.CatAppearance), 
        DefaultValue(FlatStyle.Popup),
        Localizable(true), 
        SRDescription(SR.ComboBoxFlatStyleDescr) 
        ]
        public FlatStyle FlatStyle { 
            get { return ComboBox.FlatStyle; }
            set { ComboBox.FlatStyle = value;}
        }
 
        /// 
        [ 
        SRCategory(SR.CatBehavior), 
        DefaultValue(true),
        Localizable(true), 
        SRDescription(SR.ComboBoxIntegralHeightDescr)
        ]
        public bool IntegralHeight {
            get { return ComboBox.IntegralHeight; } 
            set { ComboBox.IntegralHeight = value;}
        } 
        ///  
        /// 
        /// Collection of the items contained in this ComboBox. 
        /// 
        [
        SRCategory(SR.CatData),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content), 
        Localizable(true),
        SRDescription(SR.ComboBoxItemsDescr), 
        Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)) 
        ]
        public ComboBox.ObjectCollection Items { 
            get{
                return ComboBox.Items;
            }
        } 

        ///  
        [ 
        SRCategory(SR.CatBehavior),
        DefaultValue(8), 
        Localizable(true),
        SRDescription(SR.ComboBoxMaxDropDownItemsDescr)
        ]
        public int MaxDropDownItems { 
            get { return ComboBox.MaxDropDownItems; }
            set { ComboBox.MaxDropDownItems = value;} 
        } 
        /// 
        [ 
        SRCategory(SR.CatBehavior),
        DefaultValue(0),
        Localizable(true),
        SRDescription(SR.ComboBoxMaxLengthDescr) 
        ]
        public int MaxLength { 
           get {  return ComboBox.MaxLength; } 
           set {  ComboBox.MaxLength = value; }
        } 

        /// 
        [
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxSelectedIndexDescr) 
        ] 
        public int SelectedIndex {
            get { return ComboBox.SelectedIndex; } 
            set { ComboBox.SelectedIndex = value;}
        }
        /// 
        [SRCategory(SR.CatBehavior), SRDescription(SR.selectedIndexChangedEventDescr)] 
        public event EventHandler SelectedIndexChanged {
            add { 
                Events.AddHandler(EventSelectedIndexChanged, value); 
            }
            remove { 
                Events.RemoveHandler(EventSelectedIndexChanged, value);
            }
        }
        ///  
        [
        Browsable(false), 
        Bindable(true), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxSelectedItemDescr) 
        ]
        public object SelectedItem {
            get { return ComboBox.SelectedItem; }
            set { ComboBox.SelectedItem = value;} 
        }
 
        ///  
        [
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxSelectedTextDescr)
        ]
        public string SelectedText { 
            get { return ComboBox.SelectedText; }
            set { ComboBox.SelectedText = value;} 
        } 
        /// 
        [ 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxSelectionLengthDescr)
        ] 
        public int SelectionLength {
            get { return ComboBox.SelectionLength; } 
            set { ComboBox.SelectionLength = value;} 
        }
 
        /// 
        [
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        SRDescription(SR.ComboBoxSelectionStartDescr)
        ] 
        public int SelectionStart { 
            get { return ComboBox.SelectionStart; }
            set { ComboBox.SelectionStart = value;} 
        }
        /// 
        [
        SRCategory(SR.CatBehavior), 
        DefaultValue(false),
        SRDescription(SR.ComboBoxSortedDescr) 
        ] 
        public bool Sorted {
            get { return ComboBox.Sorted; } 
            set {ComboBox.Sorted = value;}
        }

 
        /// 
        [SRCategory(SR.CatBehavior), SRDescription(SR.ComboBoxOnTextUpdateDescr)] 
        public event EventHandler TextUpdate { 
            add {
                Events.AddHandler(EventTextUpdate, value); 
            }
            remove {
                Events.RemoveHandler(EventTextUpdate, value);
            } 
        }
 
#region WrappedMethods 

        ///  
        public void BeginUpdate() { ComboBox.BeginUpdate(); }
        /// 
        public void EndUpdate() { ComboBox.EndUpdate(); }
        ///  
        public int FindString(string s) { return ComboBox.FindString(s); }
        ///  
        public int FindString(string s, int startIndex) { return ComboBox.FindString(s, startIndex); } 
        /// 
        public int FindStringExact(string s) { return ComboBox.FindStringExact(s); } 
        /// 
        public int FindStringExact(string s, int startIndex) { return ComboBox.FindStringExact(s, startIndex); }
        /// 
        public int GetItemHeight(int index) { return ComboBox.GetItemHeight(index); } 
        /// 
        public void Select(int start, int length) { ComboBox.Select(start, length); } 
        ///  
        public void SelectAll() { ComboBox.SelectAll(); }
 
#endregion WrappedMethods

        /// 
        public override Size GetPreferredSize(Size constrainingSize) { 

            // 
            Size preferredSize = base.GetPreferredSize(constrainingSize); 
            preferredSize.Width = Math.Max(preferredSize.Width, 75);
 
            return preferredSize;
        }
        private void HandleDropDown(object sender, System.EventArgs e) {
            OnDropDown(e); 
        }
        private void HandleDropDownClosed(object sender, System.EventArgs e) { 
            OnDropDownClosed(e); 
        }
 
        private void HandleDropDownStyleChanged(object sender, System.EventArgs e) {
            OnDropDownStyleChanged(e);
        }
        private void HandleSelectedIndexChanged(object sender, System.EventArgs e) { 
            OnSelectedIndexChanged(e);
        } 
        private void HandleSelectionChangeCommitted(object sender, System.EventArgs e) { 
            OnSelectionChangeCommitted(e);
        } 
        private void HandleTextUpdate(object sender, System.EventArgs e) {
            OnTextUpdate(e);
        }
 
        /// 
        protected virtual void OnDropDown(EventArgs e) { 
            if (ParentInternal != null) { 
                // PERF, SECREVIEW: dont call Application.RemoveMessageFilter as this could
                // get called a lot and we want to have to assert AWP. 
                Application.ThreadContext.FromCurrent().RemoveMessageFilter(ParentInternal.RestoreFocusFilter);
                ToolStripManager.ModalMenuFilter.SuspendMenuMode();
            }
            RaiseEvent(EventDropDown, e); 
        }
        ///  
        protected virtual void OnDropDownClosed(EventArgs e) { 
            if (ParentInternal != null) {
                // PERF, SECREVIEW: dont call Application.RemoveMessageFilter as this could 
                // get called a lot and we want to have to assert AWP.
                Application.ThreadContext.FromCurrent().RemoveMessageFilter(ParentInternal.RestoreFocusFilter);
                ToolStripManager.ModalMenuFilter.ResumeMenuMode();
            } 
            RaiseEvent(EventDropDownClosed, e);
        } 
        ///  
        protected virtual void OnDropDownStyleChanged(EventArgs e) {
            RaiseEvent(EventDropDownStyleChanged, e); 
        }
        /// 
        protected virtual void OnSelectedIndexChanged(EventArgs e) {
            RaiseEvent(EventSelectedIndexChanged, e); 
        }
        ///  
        protected virtual void OnSelectionChangeCommitted(EventArgs e) { 
            RaiseEvent(EventSelectionChangeCommitted, e);
        } 
        /// 
        protected virtual void OnTextUpdate(EventArgs e) {
            RaiseEvent(EventTextUpdate, e);
        } 

        ///  
        protected override void OnSubscribeControlEvents(Control control) { 
            ComboBox comboBox = control as ComboBox;
            if (comboBox != null) { 
                // Please keep this alphabetized and in [....] with Unsubscribe
                //
                comboBox.DropDown                   += new EventHandler(HandleDropDown);
                comboBox.DropDownClosed             += new EventHandler(HandleDropDownClosed); 
                comboBox.DropDownStyleChanged       += new EventHandler(HandleDropDownStyleChanged);
                comboBox.SelectedIndexChanged       += new EventHandler(HandleSelectedIndexChanged); 
                comboBox.SelectionChangeCommitted   += new EventHandler(HandleSelectionChangeCommitted); 
                comboBox.TextUpdate                 += new EventHandler(HandleTextUpdate);
            } 

            base.OnSubscribeControlEvents(control);
        }
 
        /// 
        protected override void OnUnsubscribeControlEvents(Control control) { 
            ComboBox comboBox = control as ComboBox; 
            if (comboBox != null) {
               // Please keep this alphabetized and in [....] with Unsubscribe 
               //
               comboBox.DropDown                   -= new EventHandler(HandleDropDown);
               comboBox.DropDownClosed             -= new EventHandler(HandleDropDownClosed);
               comboBox.DropDownStyleChanged       -= new EventHandler(HandleDropDownStyleChanged); 
               comboBox.SelectedIndexChanged       -= new EventHandler(HandleSelectedIndexChanged);
               comboBox.SelectionChangeCommitted   -= new EventHandler(HandleSelectionChangeCommitted); 
               comboBox.TextUpdate                 -= new EventHandler(HandleTextUpdate); 
            }
            base.OnUnsubscribeControlEvents(control); 
        }

        private bool ShouldSerializeDropDownWidth() {
            return ComboBox.ShouldSerializeDropDownWidth(); 
        }
 
        internal override bool ShouldSerializeFont() { 
            return !object.Equals(this.Font, ToolStripManager.DefaultFont);
        } 

        public override string ToString() {
            return base.ToString() + ", Items.Count: " + Items.Count.ToString(CultureInfo.CurrentCulture);
        } 

 
        internal class ToolStripComboBoxControl : ComboBox { 
               private ToolStripComboBox owner = null;
 
               public ToolStripComboBoxControl() {
                   this.FlatStyle = FlatStyle.Popup;
                   SetStyle(ControlStyles.ResizeRedraw | ControlStyles.OptimizedDoubleBuffer, true);
               } 
               public ToolStripComboBox Owner {
                  get { return owner; } 
                  set { owner = value; } 
               }
 
               private ProfessionalColorTable ColorTable {
                    get {
                        if (Owner != null) {
                            ToolStripProfessionalRenderer renderer = Owner.Renderer as ToolStripProfessionalRenderer; 
                            if (renderer != null) {
                                return renderer.ColorTable; 
                            } 
                        }
                        return ProfessionalColors.ColorTable; 
                    }
               }

               internal override FlatComboAdapter CreateFlatComboAdapterInstance() { 
                   return new ToolStripComboBoxFlatComboAdapter(this);
               } 
 
               internal class ToolStripComboBoxFlatComboAdapter : FlatComboAdapter {
 
                    public ToolStripComboBoxFlatComboAdapter(ComboBox comboBox) : base(comboBox, /*smallButton=*/true) {
                    }

                    private static bool UseBaseAdapter(ComboBox comboBox) { 
                        ToolStripComboBoxControl toolStripComboBox = comboBox as ToolStripComboBoxControl;
                        if (toolStripComboBox == null || !(toolStripComboBox.Owner.Renderer is ToolStripProfessionalRenderer)) { 
                            Debug.Assert(toolStripComboBox != null, "Why are we here and not a toolstrip combo?"); 
                            return true;
                        } 
                        return false;
                    }
                    private static ProfessionalColorTable GetColorTable(ToolStripComboBoxControl toolStripComboBoxControl) {
                        if (toolStripComboBoxControl != null) { 
                            return toolStripComboBoxControl.ColorTable;
                        } 
                        return ProfessionalColors.ColorTable; 
                   }
                    protected override Color GetOuterBorderColor(ComboBox comboBox) { 
                        if (UseBaseAdapter(comboBox)) {
                            return base.GetOuterBorderColor(comboBox);
                        }
                        return (comboBox.Enabled) ? SystemColors.Window : GetColorTable(comboBox as ToolStripComboBoxControl).ComboBoxBorder; 
                    }
 
                    protected override Color GetPopupOuterBorderColor(ComboBox comboBox, bool focused) { 
                        if (UseBaseAdapter(comboBox)) {
                            return base.GetPopupOuterBorderColor(comboBox, focused); 
                        }
                        if (!comboBox.Enabled) {
                            return SystemColors.ControlDark;
                        } 
                        return (focused) ? GetColorTable(comboBox as ToolStripComboBoxControl).ComboBoxBorder : SystemColors.Window;
                    } 
 
                    protected override void DrawFlatComboDropDown(ComboBox comboBox, Graphics g, Rectangle dropDownRect) {
                        if (UseBaseAdapter(comboBox)) { 
                             base.DrawFlatComboDropDown(comboBox, g, dropDownRect);
                             return;
                        }
 

                        if (!comboBox.Enabled || !ToolStripManager.VisualStylesEnabled) { 
                            g.FillRectangle(SystemBrushes.Control, dropDownRect); 
                        }
                        else { 

                            ToolStripComboBoxControl toolStripComboBox = comboBox as ToolStripComboBoxControl;
                            ProfessionalColorTable colorTable = GetColorTable(toolStripComboBox);
 
                            if (!comboBox.DroppedDown) {
                                bool focused = comboBox.ContainsFocus || comboBox.MouseIsOver; 
                                if (focused) { 
                                    using (Brush b = new LinearGradientBrush(dropDownRect, colorTable.ComboBoxButtonSelectedGradientBegin, colorTable.ComboBoxButtonSelectedGradientEnd, LinearGradientMode.Vertical)) {
                                        g.FillRectangle(b, dropDownRect); 
                                    }
                                }
                                else if (toolStripComboBox.Owner.IsOnOverflow) {
                                    using (Brush b = new SolidBrush(colorTable.ComboBoxButtonOnOverflow)) { 
                                        g.FillRectangle(b, dropDownRect);
                                    } 
                                } 
                                else {
                                    using (Brush b = new LinearGradientBrush(dropDownRect, colorTable.ComboBoxButtonGradientBegin, colorTable.ComboBoxButtonGradientEnd, LinearGradientMode.Vertical)) { 
                                        g.FillRectangle(b, dropDownRect);
                                    }
                                }
                            } 
                            else {
                                using (Brush b = new LinearGradientBrush(dropDownRect, colorTable.ComboBoxButtonPressedGradientBegin, colorTable.ComboBoxButtonPressedGradientEnd, LinearGradientMode.Vertical)) { 
                                    g.FillRectangle(b, dropDownRect); 
                                }
                            } 
                        }

                        Brush brush = (comboBox.Enabled) ? SystemBrushes.ControlText : SystemBrushes.GrayText;
                        Point middle = new Point(dropDownRect.Left + dropDownRect.Width / 2, dropDownRect.Top + dropDownRect.Height / 2); 

                        // if the width is odd - favor pushing it over one pixel right. 
                        middle.X += (dropDownRect.Width % 2); 
                        g.FillPolygon(brush, new Point[] {
                            new Point(middle.X - 2, middle.Y - 1), new Point(middle.X + 3, middle.Y - 1), new Point(middle.X, middle.Y + 2) 
                        });

                    }
               } 

               protected override bool IsInputKey(Keys keyData) { 
                   if ((keyData & Keys.Alt) == Keys.Alt) { 
                       if ((keyData & Keys.Down) == Keys.Down || (keyData & Keys.Up) == Keys.Up) {
                           return true; 
                       }
                   }
                   return base.IsInputKey(keyData);
               } 

 
               protected override void OnDropDownClosed(EventArgs e) { 
                   base.OnDropDownClosed(e);
                   Invalidate(); 
                   Update();
               }

        } 

    } 
 
}

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

 
namespace System.Windows.Forms { 
    using System;
    using System.Drawing; 
    using System.Windows.Forms;
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Drawing.Design; 
    using System.Collections.Specialized;
    using System.Drawing.Drawing2D; 
    using System.Windows.Forms.Design; 
    using System.Security;
    using System.Security.Permissions; 
    using System.Runtime.InteropServices;
    using System.Windows.Forms.Internal;
    using System.Globalization;
 
    /// 
    ///  
    [ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.MenuStrip | ToolStripItemDesignerAvailability.ToolStrip | ToolStripItemDesignerAvailability.ContextMenuStrip)] 
    [DefaultProperty("Items")]
    public class ToolStripComboBox : ToolStripControlHost { 


        internal static readonly object EventDropDown                                    = new object();
        internal static readonly object EventDropDownClosed                              = new object(); 
        internal static readonly object EventDropDownStyleChanged                        = new object();
        internal static readonly object EventSelectedIndexChanged                        = new object(); 
        internal static readonly object EventSelectionChangeCommitted                    = new object(); 
        internal static readonly object EventTextUpdate                                   = new object();
 

        /// 
        public ToolStripComboBox() : base(CreateControlInstance()) {
            ToolStripComboBoxControl combo = Control as ToolStripComboBoxControl; 
            combo.Owner = this;
        } 
        public ToolStripComboBox(string name) : this() { 
            this.Name = name;
        } 


        /// 
        [EditorBrowsable(EditorBrowsableState.Never)] 
        public ToolStripComboBox(Control c) : base(c) {
            throw new NotSupportedException(SR.GetString(SR.ToolStripMustSupplyItsOwnComboBox)); 
        } 

        private static Control CreateControlInstance() { 
            ComboBox comboBox = new ToolStripComboBoxControl();
            comboBox.FlatStyle = FlatStyle.Popup;
            comboBox.Font = ToolStripManager.DefaultFont;
            return comboBox; 
        }
        ///  
        [ 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
        Localizable(true), 
        SRDescription(SR.ComboBoxAutoCompleteCustomSourceDescr),
        Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always)
        ] 
        public System.Windows.Forms.AutoCompleteStringCollection AutoCompleteCustomSource {
            get { return ComboBox.AutoCompleteCustomSource; } 
            set { ComboBox.AutoCompleteCustomSource = value;} 
        }
 
        /// 
        [
        DefaultValue(AutoCompleteMode.None),
        SRDescription(SR.ComboBoxAutoCompleteModeDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always)
        ] 
        public AutoCompleteMode AutoCompleteMode { 
            get { return ComboBox.AutoCompleteMode; }
            set { ComboBox.AutoCompleteMode = value;} 
        }

        /// 
        [ 
        DefaultValue(AutoCompleteSource.None),
        SRDescription(SR.ComboBoxAutoCompleteSourceDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always) 
        ]
        public AutoCompleteSource AutoCompleteSource { 
            get { return ComboBox.AutoCompleteSource; }
            set { ComboBox.AutoCompleteSource = value;}
        }
 
        [
        Browsable(false), 
        EditorBrowsable(EditorBrowsableState.Never), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        ] 
        public override Image BackgroundImage {
            get {
                return base.BackgroundImage;
            } 
            set {
                base.BackgroundImage = value; 
            } 
        }
 
        [
        Browsable(false),
        EditorBrowsable(EditorBrowsableState.Never),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) 
        ]
        public override ImageLayout BackgroundImageLayout { 
            get { 
                return base.BackgroundImageLayout;
            } 
            set {
                base.BackgroundImageLayout = value;
            }
        } 

        ///  
        [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] 
        public ComboBox ComboBox {
            get{ 
                return Control as ComboBox;
            }
        }
 
        /// 
        protected override Size DefaultSize { 
            get { 
                return new Size(100,22);
            } 
        }

        /// 
        ///  
        /// Deriving classes can override this to configure a default size for their control.
        /// This is more efficient than setting the size in the control's constructor. 
        ///  
        protected internal override Padding DefaultMargin {
            get { 
                if (IsOnDropDown) {
                    return new Padding(2);
                }
                else { 
                    return new Padding(1, 0, 1, 0);
                } 
            } 
        }
        [ 
        Browsable(false),
        EditorBrowsable(EditorBrowsableState.Never)
        ]
        public new event EventHandler DoubleClick { 
            add {
                base.DoubleClick+=value; 
            } 
            remove {
                base.DoubleClick -= value; 
            }
        }

        ///  
        [SRCategory(SR.CatBehavior), SRDescription(SR.ComboBoxOnDropDownDescr)]
        public event EventHandler DropDown { 
            add { 
                Events.AddHandler(EventDropDown, value);
            } 
            remove {
                Events.RemoveHandler(EventDropDown, value);
            }
        } 

         ///  
        [SRCategory(SR.CatBehavior), SRDescription(SR.ComboBoxOnDropDownClosedDescr)] 
        public event EventHandler DropDownClosed {
            add { 
                Events.AddHandler(EventDropDownClosed, value);
            }
            remove {
                Events.RemoveHandler(EventDropDownClosed, value); 
            }
        } 
        ///  
        [SRCategory(SR.CatBehavior), SRDescription(SR.ComboBoxDropDownStyleChangedDescr)]
        public event EventHandler DropDownStyleChanged { 
            add {
                Events.AddHandler(EventDropDownStyleChanged, value);
            }
            remove { 
                Events.RemoveHandler(EventDropDownStyleChanged, value);
            } 
        } 

 
        /// 
        [
        SRCategory(SR.CatBehavior),
        SRDescription(SR.ComboBoxDropDownHeightDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always),
        DefaultValue(106) 
        ] 
        public int DropDownHeight {
            get { return ComboBox.DropDownHeight; } 
            set { ComboBox.DropDownHeight = value;}

        }
 
        /// 
        [ 
        SRCategory(SR.CatAppearance), 
        DefaultValue(ComboBoxStyle.DropDown),
        SRDescription(SR.ComboBoxStyleDescr), 
        RefreshPropertiesAttribute(RefreshProperties.Repaint)
        ]
        public ComboBoxStyle DropDownStyle {
            get { return ComboBox.DropDownStyle; } 
            set { ComboBox.DropDownStyle = value;}
        } 
 
        /// 
        [ 
        SRCategory(SR.CatBehavior),
        SRDescription(SR.ComboBoxDropDownWidthDescr)
        ]
        public int DropDownWidth { 
            get { return ComboBox.DropDownWidth; }
            set { ComboBox.DropDownWidth = value;} 
        } 

        ///  
        [
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxDroppedDownDescr) 
        ]
        public bool DroppedDown { 
            get { return ComboBox.DroppedDown; } 
            set { ComboBox.DroppedDown = value;}
        } 

        /// 
        [
        SRCategory(SR.CatAppearance), 
        DefaultValue(FlatStyle.Popup),
        Localizable(true), 
        SRDescription(SR.ComboBoxFlatStyleDescr) 
        ]
        public FlatStyle FlatStyle { 
            get { return ComboBox.FlatStyle; }
            set { ComboBox.FlatStyle = value;}
        }
 
        /// 
        [ 
        SRCategory(SR.CatBehavior), 
        DefaultValue(true),
        Localizable(true), 
        SRDescription(SR.ComboBoxIntegralHeightDescr)
        ]
        public bool IntegralHeight {
            get { return ComboBox.IntegralHeight; } 
            set { ComboBox.IntegralHeight = value;}
        } 
        ///  
        /// 
        /// Collection of the items contained in this ComboBox. 
        /// 
        [
        SRCategory(SR.CatData),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content), 
        Localizable(true),
        SRDescription(SR.ComboBoxItemsDescr), 
        Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)) 
        ]
        public ComboBox.ObjectCollection Items { 
            get{
                return ComboBox.Items;
            }
        } 

        ///  
        [ 
        SRCategory(SR.CatBehavior),
        DefaultValue(8), 
        Localizable(true),
        SRDescription(SR.ComboBoxMaxDropDownItemsDescr)
        ]
        public int MaxDropDownItems { 
            get { return ComboBox.MaxDropDownItems; }
            set { ComboBox.MaxDropDownItems = value;} 
        } 
        /// 
        [ 
        SRCategory(SR.CatBehavior),
        DefaultValue(0),
        Localizable(true),
        SRDescription(SR.ComboBoxMaxLengthDescr) 
        ]
        public int MaxLength { 
           get {  return ComboBox.MaxLength; } 
           set {  ComboBox.MaxLength = value; }
        } 

        /// 
        [
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxSelectedIndexDescr) 
        ] 
        public int SelectedIndex {
            get { return ComboBox.SelectedIndex; } 
            set { ComboBox.SelectedIndex = value;}
        }
        /// 
        [SRCategory(SR.CatBehavior), SRDescription(SR.selectedIndexChangedEventDescr)] 
        public event EventHandler SelectedIndexChanged {
            add { 
                Events.AddHandler(EventSelectedIndexChanged, value); 
            }
            remove { 
                Events.RemoveHandler(EventSelectedIndexChanged, value);
            }
        }
        ///  
        [
        Browsable(false), 
        Bindable(true), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxSelectedItemDescr) 
        ]
        public object SelectedItem {
            get { return ComboBox.SelectedItem; }
            set { ComboBox.SelectedItem = value;} 
        }
 
        ///  
        [
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxSelectedTextDescr)
        ]
        public string SelectedText { 
            get { return ComboBox.SelectedText; }
            set { ComboBox.SelectedText = value;} 
        } 
        /// 
        [ 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.ComboBoxSelectionLengthDescr)
        ] 
        public int SelectionLength {
            get { return ComboBox.SelectionLength; } 
            set { ComboBox.SelectionLength = value;} 
        }
 
        /// 
        [
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        SRDescription(SR.ComboBoxSelectionStartDescr)
        ] 
        public int SelectionStart { 
            get { return ComboBox.SelectionStart; }
            set { ComboBox.SelectionStart = value;} 
        }
        /// 
        [
        SRCategory(SR.CatBehavior), 
        DefaultValue(false),
        SRDescription(SR.ComboBoxSortedDescr) 
        ] 
        public bool Sorted {
            get { return ComboBox.Sorted; } 
            set {ComboBox.Sorted = value;}
        }

 
        /// 
        [SRCategory(SR.CatBehavior), SRDescription(SR.ComboBoxOnTextUpdateDescr)] 
        public event EventHandler TextUpdate { 
            add {
                Events.AddHandler(EventTextUpdate, value); 
            }
            remove {
                Events.RemoveHandler(EventTextUpdate, value);
            } 
        }
 
#region WrappedMethods 

        ///  
        public void BeginUpdate() { ComboBox.BeginUpdate(); }
        /// 
        public void EndUpdate() { ComboBox.EndUpdate(); }
        ///  
        public int FindString(string s) { return ComboBox.FindString(s); }
        ///  
        public int FindString(string s, int startIndex) { return ComboBox.FindString(s, startIndex); } 
        /// 
        public int FindStringExact(string s) { return ComboBox.FindStringExact(s); } 
        /// 
        public int FindStringExact(string s, int startIndex) { return ComboBox.FindStringExact(s, startIndex); }
        /// 
        public int GetItemHeight(int index) { return ComboBox.GetItemHeight(index); } 
        /// 
        public void Select(int start, int length) { ComboBox.Select(start, length); } 
        ///  
        public void SelectAll() { ComboBox.SelectAll(); }
 
#endregion WrappedMethods

        /// 
        public override Size GetPreferredSize(Size constrainingSize) { 

            // 
            Size preferredSize = base.GetPreferredSize(constrainingSize); 
            preferredSize.Width = Math.Max(preferredSize.Width, 75);
 
            return preferredSize;
        }
        private void HandleDropDown(object sender, System.EventArgs e) {
            OnDropDown(e); 
        }
        private void HandleDropDownClosed(object sender, System.EventArgs e) { 
            OnDropDownClosed(e); 
        }
 
        private void HandleDropDownStyleChanged(object sender, System.EventArgs e) {
            OnDropDownStyleChanged(e);
        }
        private void HandleSelectedIndexChanged(object sender, System.EventArgs e) { 
            OnSelectedIndexChanged(e);
        } 
        private void HandleSelectionChangeCommitted(object sender, System.EventArgs e) { 
            OnSelectionChangeCommitted(e);
        } 
        private void HandleTextUpdate(object sender, System.EventArgs e) {
            OnTextUpdate(e);
        }
 
        /// 
        protected virtual void OnDropDown(EventArgs e) { 
            if (ParentInternal != null) { 
                // PERF, SECREVIEW: dont call Application.RemoveMessageFilter as this could
                // get called a lot and we want to have to assert AWP. 
                Application.ThreadContext.FromCurrent().RemoveMessageFilter(ParentInternal.RestoreFocusFilter);
                ToolStripManager.ModalMenuFilter.SuspendMenuMode();
            }
            RaiseEvent(EventDropDown, e); 
        }
        ///  
        protected virtual void OnDropDownClosed(EventArgs e) { 
            if (ParentInternal != null) {
                // PERF, SECREVIEW: dont call Application.RemoveMessageFilter as this could 
                // get called a lot and we want to have to assert AWP.
                Application.ThreadContext.FromCurrent().RemoveMessageFilter(ParentInternal.RestoreFocusFilter);
                ToolStripManager.ModalMenuFilter.ResumeMenuMode();
            } 
            RaiseEvent(EventDropDownClosed, e);
        } 
        ///  
        protected virtual void OnDropDownStyleChanged(EventArgs e) {
            RaiseEvent(EventDropDownStyleChanged, e); 
        }
        /// 
        protected virtual void OnSelectedIndexChanged(EventArgs e) {
            RaiseEvent(EventSelectedIndexChanged, e); 
        }
        ///  
        protected virtual void OnSelectionChangeCommitted(EventArgs e) { 
            RaiseEvent(EventSelectionChangeCommitted, e);
        } 
        /// 
        protected virtual void OnTextUpdate(EventArgs e) {
            RaiseEvent(EventTextUpdate, e);
        } 

        ///  
        protected override void OnSubscribeControlEvents(Control control) { 
            ComboBox comboBox = control as ComboBox;
            if (comboBox != null) { 
                // Please keep this alphabetized and in [....] with Unsubscribe
                //
                comboBox.DropDown                   += new EventHandler(HandleDropDown);
                comboBox.DropDownClosed             += new EventHandler(HandleDropDownClosed); 
                comboBox.DropDownStyleChanged       += new EventHandler(HandleDropDownStyleChanged);
                comboBox.SelectedIndexChanged       += new EventHandler(HandleSelectedIndexChanged); 
                comboBox.SelectionChangeCommitted   += new EventHandler(HandleSelectionChangeCommitted); 
                comboBox.TextUpdate                 += new EventHandler(HandleTextUpdate);
            } 

            base.OnSubscribeControlEvents(control);
        }
 
        /// 
        protected override void OnUnsubscribeControlEvents(Control control) { 
            ComboBox comboBox = control as ComboBox; 
            if (comboBox != null) {
               // Please keep this alphabetized and in [....] with Unsubscribe 
               //
               comboBox.DropDown                   -= new EventHandler(HandleDropDown);
               comboBox.DropDownClosed             -= new EventHandler(HandleDropDownClosed);
               comboBox.DropDownStyleChanged       -= new EventHandler(HandleDropDownStyleChanged); 
               comboBox.SelectedIndexChanged       -= new EventHandler(HandleSelectedIndexChanged);
               comboBox.SelectionChangeCommitted   -= new EventHandler(HandleSelectionChangeCommitted); 
               comboBox.TextUpdate                 -= new EventHandler(HandleTextUpdate); 
            }
            base.OnUnsubscribeControlEvents(control); 
        }

        private bool ShouldSerializeDropDownWidth() {
            return ComboBox.ShouldSerializeDropDownWidth(); 
        }
 
        internal override bool ShouldSerializeFont() { 
            return !object.Equals(this.Font, ToolStripManager.DefaultFont);
        } 

        public override string ToString() {
            return base.ToString() + ", Items.Count: " + Items.Count.ToString(CultureInfo.CurrentCulture);
        } 

 
        internal class ToolStripComboBoxControl : ComboBox { 
               private ToolStripComboBox owner = null;
 
               public ToolStripComboBoxControl() {
                   this.FlatStyle = FlatStyle.Popup;
                   SetStyle(ControlStyles.ResizeRedraw | ControlStyles.OptimizedDoubleBuffer, true);
               } 
               public ToolStripComboBox Owner {
                  get { return owner; } 
                  set { owner = value; } 
               }
 
               private ProfessionalColorTable ColorTable {
                    get {
                        if (Owner != null) {
                            ToolStripProfessionalRenderer renderer = Owner.Renderer as ToolStripProfessionalRenderer; 
                            if (renderer != null) {
                                return renderer.ColorTable; 
                            } 
                        }
                        return ProfessionalColors.ColorTable; 
                    }
               }

               internal override FlatComboAdapter CreateFlatComboAdapterInstance() { 
                   return new ToolStripComboBoxFlatComboAdapter(this);
               } 
 
               internal class ToolStripComboBoxFlatComboAdapter : FlatComboAdapter {
 
                    public ToolStripComboBoxFlatComboAdapter(ComboBox comboBox) : base(comboBox, /*smallButton=*/true) {
                    }

                    private static bool UseBaseAdapter(ComboBox comboBox) { 
                        ToolStripComboBoxControl toolStripComboBox = comboBox as ToolStripComboBoxControl;
                        if (toolStripComboBox == null || !(toolStripComboBox.Owner.Renderer is ToolStripProfessionalRenderer)) { 
                            Debug.Assert(toolStripComboBox != null, "Why are we here and not a toolstrip combo?"); 
                            return true;
                        } 
                        return false;
                    }
                    private static ProfessionalColorTable GetColorTable(ToolStripComboBoxControl toolStripComboBoxControl) {
                        if (toolStripComboBoxControl != null) { 
                            return toolStripComboBoxControl.ColorTable;
                        } 
                        return ProfessionalColors.ColorTable; 
                   }
                    protected override Color GetOuterBorderColor(ComboBox comboBox) { 
                        if (UseBaseAdapter(comboBox)) {
                            return base.GetOuterBorderColor(comboBox);
                        }
                        return (comboBox.Enabled) ? SystemColors.Window : GetColorTable(comboBox as ToolStripComboBoxControl).ComboBoxBorder; 
                    }
 
                    protected override Color GetPopupOuterBorderColor(ComboBox comboBox, bool focused) { 
                        if (UseBaseAdapter(comboBox)) {
                            return base.GetPopupOuterBorderColor(comboBox, focused); 
                        }
                        if (!comboBox.Enabled) {
                            return SystemColors.ControlDark;
                        } 
                        return (focused) ? GetColorTable(comboBox as ToolStripComboBoxControl).ComboBoxBorder : SystemColors.Window;
                    } 
 
                    protected override void DrawFlatComboDropDown(ComboBox comboBox, Graphics g, Rectangle dropDownRect) {
                        if (UseBaseAdapter(comboBox)) { 
                             base.DrawFlatComboDropDown(comboBox, g, dropDownRect);
                             return;
                        }
 

                        if (!comboBox.Enabled || !ToolStripManager.VisualStylesEnabled) { 
                            g.FillRectangle(SystemBrushes.Control, dropDownRect); 
                        }
                        else { 

                            ToolStripComboBoxControl toolStripComboBox = comboBox as ToolStripComboBoxControl;
                            ProfessionalColorTable colorTable = GetColorTable(toolStripComboBox);
 
                            if (!comboBox.DroppedDown) {
                                bool focused = comboBox.ContainsFocus || comboBox.MouseIsOver; 
                                if (focused) { 
                                    using (Brush b = new LinearGradientBrush(dropDownRect, colorTable.ComboBoxButtonSelectedGradientBegin, colorTable.ComboBoxButtonSelectedGradientEnd, LinearGradientMode.Vertical)) {
                                        g.FillRectangle(b, dropDownRect); 
                                    }
                                }
                                else if (toolStripComboBox.Owner.IsOnOverflow) {
                                    using (Brush b = new SolidBrush(colorTable.ComboBoxButtonOnOverflow)) { 
                                        g.FillRectangle(b, dropDownRect);
                                    } 
                                } 
                                else {
                                    using (Brush b = new LinearGradientBrush(dropDownRect, colorTable.ComboBoxButtonGradientBegin, colorTable.ComboBoxButtonGradientEnd, LinearGradientMode.Vertical)) { 
                                        g.FillRectangle(b, dropDownRect);
                                    }
                                }
                            } 
                            else {
                                using (Brush b = new LinearGradientBrush(dropDownRect, colorTable.ComboBoxButtonPressedGradientBegin, colorTable.ComboBoxButtonPressedGradientEnd, LinearGradientMode.Vertical)) { 
                                    g.FillRectangle(b, dropDownRect); 
                                }
                            } 
                        }

                        Brush brush = (comboBox.Enabled) ? SystemBrushes.ControlText : SystemBrushes.GrayText;
                        Point middle = new Point(dropDownRect.Left + dropDownRect.Width / 2, dropDownRect.Top + dropDownRect.Height / 2); 

                        // if the width is odd - favor pushing it over one pixel right. 
                        middle.X += (dropDownRect.Width % 2); 
                        g.FillPolygon(brush, new Point[] {
                            new Point(middle.X - 2, middle.Y - 1), new Point(middle.X + 3, middle.Y - 1), new Point(middle.X, middle.Y + 2) 
                        });

                    }
               } 

               protected override bool IsInputKey(Keys keyData) { 
                   if ((keyData & Keys.Alt) == Keys.Alt) { 
                       if ((keyData & Keys.Down) == Keys.Down || (keyData & Keys.Up) == Keys.Up) {
                           return true; 
                       }
                   }
                   return base.IsInputKey(keyData);
               } 

 
               protected override void OnDropDownClosed(EventArgs e) { 
                   base.OnDropDownClosed(e);
                   Invalidate(); 
                   Update();
               }

        } 

    } 
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

                        

                        

                        
                        

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• RsaSecurityTokenAuthenticator.cs
• DataControlImageButton.cs
• InvalidFilterCriteriaException.cs
• WebHostScriptMappingsInstallComponent.cs
• Utility.cs
• PersonalizationProviderHelper.cs
• BooleanExpr.cs
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• DocumentApplication.cs
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• XmlNamedNodeMap.cs
• DbConvert.cs
• SurrogateChar.cs
• StreamReader.cs
• DPAPIProtectedConfigurationProvider.cs
• SmtpMail.cs
• NavigationPropertyAccessor.cs
• SerializationAttributes.cs
• MasterPageCodeDomTreeGenerator.cs
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• CollectionExtensions.cs
• InvokeWebServiceDesigner.cs
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• AppSecurityManager.cs
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• IntSecurity.cs
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• peersecuritysettings.cs
• XsltOutput.cs
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• LayoutTableCell.cs
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