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Clipz - A Friendly Introduction to the Windows 7 Taskbar Features

, 17 Dec 2009
An overview of the Windows 7 taskbar features, and how to use then in your own applications.
Clipz.zip
Clipz
bin
Debug
Clipz.csproj.user
CopyIcon.ico
DeleteIcon.ico
Model
Native Methods
Properties
Settings.settings
Resources
Audio.png
Clipboard.png
NextIcon.ico
PreviousIcon.ico
Utility
Core
AppRestartRecovery
Dialogs
Common
TaskDialogs
Interop
AppRestartRecovery
Dialogs
NetworkList
PowerManagement
TaskDialogs
NetworkList
PowerManagement
Properties
PropertySystem
SafeHandles
Libraries
StructureMap.dll
Shell
Common
CommonFileDialogs
Controls
Design
ShellObjects.cd
ShellThumbnailClassDiagram.cd
DesktopWindowManager
ExplorerBrowser
ExplorerBrowserDiagram.cd
Interop
Common
Dialogs
ExplorerBrowser
KnownFolders
PropertySystem
StockIcons
Taskbar
KnownFolders
Properties
PropertySystem
StockIcons
Taskbar
//Copyright (c) Microsoft Corporation.  All rights reserved.

using System;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Windows.Markup;

namespace Microsoft.WindowsAPICodePack.Dialogs.Controls
{
    /// <summary>
    /// Creates the ComboBox controls in the Common File Dialog.
    /// </summary>
    [ContentProperty("Items")]
    public class CommonFileDialogComboBox : CommonFileDialogProminentControl, ICommonFileDialogIndexedControls
    {
        private readonly Collection<CommonFileDialogComboBoxItem> items = new Collection<CommonFileDialogComboBoxItem>();
        /// <summary>
        /// Gets the collection of CommonFileDialogComboBoxItem objects.
        /// </summary>
        public Collection<CommonFileDialogComboBoxItem> Items
        {
            get { return items; }
        }

        /// <summary>
        /// Creates a new instance of this class.
        /// </summary>
        public CommonFileDialogComboBox()
        {
        }

        /// <summary>
        /// Creates a new instance of this class with the specified name.
        /// </summary>
        /// <param name="name">Text to display for this control</param>
        public CommonFileDialogComboBox(string name): base (name, String.Empty)
        {
        }

        #region ICommonFileDialogIndexedControls Members

        private int selectedIndex = -1;
        /// <summary>
        /// Gets or sets the current index of the selected item.
        /// </summary>
        public int SelectedIndex
        {
            get { return selectedIndex; }
            set
            {
                // Don't update property if it hasn't changed
                if (selectedIndex == value)
                    return;

                if (HostingDialog == null)
                {
                    selectedIndex = value;
                    return;
                }

                // Only update this property if it has a valid value
                if (value >= 0 && value < items.Count)
                {
                    selectedIndex = value;
                    ApplyPropertyChange("SelectedIndex");
                }
                else
                {
                    throw new IndexOutOfRangeException("Index was outside the bounds of the CommonFileDialogComboBox.");
                }
            }
        }

        /// <summary>
        /// Occurs when the SelectedIndex is changed.
        /// </summary>
        /// 
        /// <remarks>
        /// By initializing the SelectedIndexChanged event with an empty
        /// delegate, it is not necessary to check  
        /// if the SelectedIndexChanged is not null.
        /// 
        /// </remarks>
        public event EventHandler SelectedIndexChanged = delegate { };

        /// <summary>
        /// Raises the SelectedIndexChanged event if this control is 
        /// enabled.
        /// </summary>
        /// <remarks>Because this method is defined in an interface, we can either
        /// have it as public, or make it private and explicitly implement (like below).
        /// Making it public doesn't really help as its only internal (but can't have this 
        /// internal because of the interface)
        /// </remarks>
        void ICommonFileDialogIndexedControls.RaiseSelectedIndexChangedEvent()
        {
            // Make sure that this control is enabled and has a specified delegate
            if (Enabled)
                SelectedIndexChanged(this, EventArgs.Empty);
        }

        #endregion

        /// <summary>
        /// Attach the ComboBox control to the dialog object
        /// </summary>
        /// <param name="dialog">The target dialog</param>
        internal override void Attach(IFileDialogCustomize dialog)
        {
            Debug.Assert(dialog != null, "CommonFileDialogComboBox.Attach: dialog parameter can not be null");
            
            // Add the combo box control
            dialog.AddComboBox(this.Id);

            // Add the combo box items
            for (int index = 0; index < items.Count; index++)
                dialog.AddControlItem(this.Id, index, items[index].Text);

            // Set the currently selected item
            if (selectedIndex >= 0 && selectedIndex < items.Count)
            {
                dialog.SetSelectedControlItem(this.Id, this.selectedIndex);
            }
            else if (selectedIndex != -1)
            {
                throw new IndexOutOfRangeException("Index was outside the bounds of the CommonFileDialogComboBox.");
            }

            // Make this control prominent if needed
            if (IsProminent)
                dialog.MakeProminent(this.Id);

            // Sync additional properties
            SyncUnmanagedProperties();
        }

    }

    /// <summary>
    /// Creates a ComboBoxItem for the Common File Dialog.
    /// </summary>
    public class CommonFileDialogComboBoxItem
    {
        private string text = String.Empty;
        /// <summary>
        /// Gets or sets the string that is displayed for this item.
        /// </summary>
        public string Text
        {
            get { return text; }
            set { text = value; }
        }

        /// <summary>
        /// Creates a new instance of this class.
        /// </summary>
        public CommonFileDialogComboBoxItem()
        {
        }

        /// <summary>
        /// Creates a new instance of this class with the specified text.
        /// </summary>
        /// <param name="text">The text to use for the combo box item.</param>
        public CommonFileDialogComboBoxItem(string text)
        {
            this.text = text;
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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TylerBrinks
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United States United States
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Web01 | 2.8.140814.1 | Last Updated 17 Dec 2009
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