将标签内容更改为WPF中当前悬停的ListView项 [英] Change label content to currently hovered ListView item in WPF

问题描述

好吧，我到处寻找答案，但一无所获。我的窗口底部有一个StatusBar，里面有一个标签，右边是一个ListView。这些项目将在整个程序执行过程中发生变化。每当鼠标在ListView中的项目上被HOVERED时，我想将StatusBar中标签的内容更改为某些内容。就像在几个程序上，当您将鼠标悬停在菜单中的项目上时，您会看到动作在StatusBar中显示的内容的简短描述。我想要这个，但使用ListView。我不仅希望在标签中镜像项目的文本，我想为它提供我自己的文本。所以我只需要获取当前悬停的项目，然后我可以使用if语句在标签中显示消息。我不知道如何做到这一点（在ListView中获取悬停的项目）。谢谢。

解决方案

一个有趣的问题..





让我们假设你有一个这样的列表视图：

 <  < span class =code-leadattribute> ListView  >  
 <   ListView.Resources  >  
 <  样式    TargetType   =  ListViewItem >  
 < span class =code-leadattribute>< Setter  Property =ToolTipValue ={ Binding  Content，RelativeSource = {RelativeSource Mode = Self} }/> 
 < /  风格 >  
 <   / ListView.Resources   >  
 <   ListViewItem  >  1 <   / ListViewItem   >  
 <   ListViewItem  >  2 <   / ListViewItem   >  
 <   ListViewItem  >  3 <   / ListViewItem  >  
 
 <   / ListView  >  
 

您可以使用MouseMoveEvent检索它:(在MainWindow.xaml.cs中）

 AddHandler（ListViewItem.MouseMoveEvent， （RoutedEventHandler）（（o，e）= >  
 {
  if  （e.Source   ListViewItem）
 {
  string  tooltip =（e。 Source  as  ListViewItem）.ToolTip  as   string  ; 
  if （tooltip！=  null ）
 Title = tooltip; 
} 
 Debug.WriteLine（e.Source）; 
}））; 
 

如果要隐藏工具提示，则必须定义另一个附加属性，例如：

  public   static   readonly  DependencyProperty ToolTipProperty = 
 DependencyProperty.RegisterAttached（  ToolTip， typeof （ string ）， typeof （MainWindow），
  new  PropertyMetadata（ ））; 
 
  public   static   void  SetToolTip（DependencyObject obj， string   value ）
 {
 obj。 SetValue（ToolTipProperty， value ）; 
} 
 
  public   static   string  GetToolTip（DependencyObject obj）
 {
  return （ string )obj.GetValue(ToolTipProperty）; 
} 

问候

Joseph Leung

OK, I have looked everywhere for an answer to this but have found nothing. I have a StatusBar at the bottom of my window with a label inside it and a ListView on the right. The items will change throughout the execution of the program. Whenever the mouse is HOVERED over an item in the ListView I want to change the content of the label in the StatusBar to something. Like on a few programs when you hover over items in the menu you see a short description of what the action does appear in a StatusBar. I want to to this but with a ListView instead. I don't just want the text of the item to be mirrored in the label, I want to provide my own text for it. So I just need to get the currently hovered over item and then I can use if statements to display a message in the label. I have no idea how to do this (get the hovered item in the ListView). Thank you.

解决方案

An interesting question..


Lets say you have a list view like this:

<ListView>
    <ListView.Resources>
        <Style TargetType="ListViewItem">
            <Setter Property="ToolTip" Value="{Binding Content, RelativeSource={RelativeSource Mode=Self}}" />
        </Style>
    </ListView.Resources>
    <ListViewItem>1</ListViewItem>
    <ListViewItem>2</ListViewItem>
    <ListViewItem>3</ListViewItem>

</ListView>

You can retrieve it using MouseMoveEvent: (in MainWindow.xaml.cs)

AddHandler(ListViewItem.MouseMoveEvent, (RoutedEventHandler)((o, e) =>
              {
                  if (e.Source is ListViewItem)
                  {
                      string tooltip = (e.Source as ListViewItem).ToolTip as string;
                      if (tooltip != null)
                          Title = tooltip;
                  }
                  Debug.WriteLine(e.Source);
              }));

If you want to hide the tooltip, you have to define another attached property, e.g.

public static readonly DependencyProperty ToolTipProperty =
           DependencyProperty.RegisterAttached("ToolTip", typeof(string), typeof(MainWindow),
           new PropertyMetadata(""));

       public static void SetToolTip(DependencyObject obj, string value)
       {
           obj.SetValue(ToolTipProperty, value);
       }

       public static string GetToolTip(DependencyObject obj)
       {
           return (string)obj.GetValue(ToolTipProperty);
       }

Regards
Joseph Leung

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