创建任务栏

• 下载源代码 - 170 KB

引言

在本教程中，我将解释如何使用 Merula Shell Library 在 C# 中创建 Windows 任务栏。

你可以在这里下载 Merula Shell Library.

首先，在 Visual Studio 中创建一个新项目。在新项目窗口中，选择 WPF 应用程序。将 Merula shell library 中的三个 DLL 添加到项目的引用中。

创建用户控件

对于每个窗口，我希望在我的任务栏中创建一个带有图像和标题的漂亮按钮。所以让我们创建一个用户控件，我将其命名为 TaskbarButton。

<UserControl    x:Class="DemoProject.TaskbarButton"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
      mc:Ignorable="d"
      d:DesignHeight="300" d:DesignWidth="300">
<Grid    Margin="5">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="32" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Image    Name="imgIcon"/>
<TextBlock    Name="lblTitle" Grid.Column="1" Margin="4" />
</Grid>
</UserControl>

在用户控件中，添加一个图像控件和一个文本块控件。

将以下代码添加到用户控件的代码隐藏文件中

using System;
using System.Windows.Controls;
using Window =    MerulaShell.windows.Window;
namespace DemoProject
{
    /// <summary>
    /// Interaction logic for TaskbarButton.xaml
    /// </summary>
    public partial class TaskbarButton : UserControl
    {
       private    readonly Window    window;
       //Constructor    with a MerulaShell.windows.window as input
       public    TaskbarButton(Window window)
       {
           InitializeComponent();
           this.window    = window;
           window.TitleChanged +=    WindowTitleChanged; 	//when the title of 
							//the window changes
           SetProperties(); //set the window properties
       }
       private    delegate void    DelegateVoid();
       void    WindowTitleChanged(object sender, EventArgs e)
       {
           Dispatcher.Invoke(new DelegateVoid(SetTitle));    //invoke because 
					//merula shell runs in another thread
       }
       private    void SetTitle()
       {
           lblTitle.Text = window.Title; 	// sets the title in the textblock
       }
       private    void SetProperties()
       {
           imgIcon.Source = window.ProgramIcon;   // sets the icon of the window
           lblTitle.Text = window.Title; 	// sets the title in the textblock
       }
    }
}

你的用户控件现在看起来会像这样

加载窗口

下一步是在我们的任务栏中加载窗口。转到主窗口的 XAML 并将网格替换为 StackPanel。

我的主窗口 XAML 如下

<Window    x:Class="DemoProject.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<StackPanel    Name="pnlTasks">

</StackPanel>
</Window> 

将以下代码添加到主窗口的代码隐藏文件中

using System;
using System.Windows;
using MerulaShellController.ManageWindows;
namespace DemoProject
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private    ManageWindows windowManager;
        public    MainWindow()
        {
            InitializeComponent();
            windowManager = new ManageWindows();    	//create a new windowmanager  
						//only one needed
            Closed += MainWindow_Closed; 		//on close event
            windowManager.WindowListChanged    += WindowManagerWindowListChanged; //when 
						//the list of windows is changed
            LoadWindows(); //load the windows
        }
        private    delegate void    DelegateVoid();
        void    WindowManagerWindowListChanged(object sender,    EventArgs e)
        {
            //invoke    because merula shell runs in another thread
            Dispatcher.Invoke(new DelegateVoid(LoadWindows));
        }
        void    MainWindow_Closed(object sender, EventArgs e)
        {
            Environment.Exit(0);    			//stops the merula shell
        }
        private    void LoadWindows()
        {
            ClearTasks();				//delete old tasks
            var    windows = windowManager.GetWindows();//windowManager.GetWindows()    
						//returns all the active windows
            foreach    (var window in    windows)
            { //foreach    window add a taskbar button
                pnlTasks.Children.Add(new TaskbarButton(window));
            }
        }
        private    void ClearTasks() 		//delete old tasks
        {
            pnlTasks.Children.Clear();
        }
    }
}

结果是，我们现在有一个带有当前活动窗口的窗口。当窗口数量发生变化以及窗口的标题发生变化时，窗口列表将被更新。

使其可交互

你仍然无法与窗口进行交互，例如最小化或最大化它们。打开 TaskButton 用户控件。将一个 MouseUp 处理程序添加到用户控件标签中。

MouseUp="UserControlMouseUp"

将以下代码添加到用户控件的代码隐藏文件中

private    bool active;
private    void UserControlMouseUp
	(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
    Background = Brushes.LightBlue; 		//set a nice active color
    if(active)    				//when active minimize and maximize
        window.MaximizeMinimize(); 		//minimize or maximize
    else
    {
        active = true; 			//set active
        window.SetToForeground(); 		//set window to foreground
    }
    InvokeActivated(new EventArgs());
}
public    void SetNonActive()
{
    active = false;    			//set active to false
    Background = Brushes.White; 		//reset color to white
}
public    event EventHandler    Activated; 	//event to notify the mainwindow
public    void InvokeActivated(EventArgs    e)
{
    EventHandler    handler = Activated;
    if    (handler != null) handler(this, e);
}

你还需要编辑主窗口的代码隐藏文件。更改 LoadWindows() 方法

private void    LoadWindows()
{
    ClearTasks();//delete old tasks
    var    windows = windowManager.GetWindows();	//windowManager.GetWindows()    
						//returns all the active windows
    foreach    (var window in    windows)
    { //foreach    window add a taskbar button
        var    button = new TaskbarButton(window);
        button.Activated +=    ButtonActivated; 	//add a event to the taskbarbutton
        pnlTasks.Children.Add(button);
    }
}

最后，你必须创建一个事件处理程序。将其添加到主窗口的代码隐藏文件中

void ButtonActivated(object    sender, EventArgs e)
{
    var    senderButton = (TaskbarButton) sender; 	//the sender button
    var    otherButtons = pnlTasks.Children.OfType<TaskbarButton>().Where
		(b    => b != senderButton); 	//select the other buttons
    foreach    (var otherButton in    otherButtons)
    {
        otherButton.SetNonActive(); 		//sets the other buttons to nonactive
    }
} 

结果是，你拥有一个可用的任务栏。

Merula Shell

有关 merula shell 的更多信息可以在以下链接中找到

• www.merulasoft.nl
• merulashell.codeplex.com

历史

• 2011 年 6 月 3 日：初始发布