Silverlight的自定义tooltip提示工具条

这种应用场景其实很多，比如游戏中装备/魔法的选择菜单，这里借用了"深蓝色右手"的一张图

 再比如聊天室中的文本颜色设置 

虽然sl的ToolTipService.ToolTip属性可以设置任何对象，比如下面这样

代码

1 <Rectangle Fill="Red" Height="50" Width="50" ToolTipService.Placement="Top">
2  <ToolTipService.ToolTip>
3  <StackPanel Orientation="Horizontal">
4  <Rectangle Fill="Green" Height="50" Width="50"></Rectangle>
5  <Rectangle Fill="Blue" Height="50" Width="50" Margin="1,0,0,0"></Rectangle>
6  <Rectangle Fill="Pink" Height="50" Width="50" Margin="1,0,0,0"></Rectangle>
7  </StackPanel>
8  </ToolTipService.ToolTip> 
9  </Rectangle>

 但是有一个问题，鼠标一旦离开对象，tooltip就消失了，没办法在tooltip工具栏上点选操作。 

所以得换一种思路，可以借助VSM方便的实现，设置好tooltip工具条后，定义二个基本的状态：Enter ，Leave 即可，Enter状态中设置tooltip对应的对象显示，Leave状态中设置tooltip对象隐藏 示例代码(Xaml)：

代码

<UserControl
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d"
    x:Class="tooltipTest.MainPage"
    d:DesignWidth="640" d:DesignHeight="480">

 <Grid x:Name="LayoutRoot">

 <!--视觉状态定义区-->
 <VisualStateManager.VisualStateGroups>
 <VisualStateGroup x:Name="CommStates">
 <VisualState x:Name="Enter">
 <Storyboard>
 <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="itemsTip" Storyboard.TargetProperty="(UIElement.Visibility)">
 <DiscreteObjectKeyFrame KeyTime="00:00:00">
 <DiscreteObjectKeyFrame.Value>
 <Visibility>Visible</Visibility>
 </DiscreteObjectKeyFrame.Value>
 </DiscreteObjectKeyFrame>
 </ObjectAnimationUsingKeyFrames>
 </Storyboard>
 </VisualState>
 <VisualState x:Name="Leave">
 <Storyboard>
 <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="itemsTip" Storyboard.TargetProperty="(UIElement.Visibility)">
 <DiscreteObjectKeyFrame KeyTime="00:00:00.1">
 <DiscreteObjectKeyFrame.Value>
 <Visibility>Collapsed</Visibility>
 </DiscreteObjectKeyFrame.Value>
 </DiscreteObjectKeyFrame>
 </ObjectAnimationUsingKeyFrames>
 </Storyboard>
 </VisualState>
 </VisualStateGroup>
 </VisualStateManager.VisualStateGroups>


 <Canvas HorizontalAlignment="Center" VerticalAlignment="Center" x:Name="cTip" Height="20" Width="20" Cursor="Hand" MouseLeave="GoToLeave" MouseEnter="GoToEnter">
 <Rectangle x:Name="rColor" Fill="Black" Width="20" Height="20" ToolTipService.ToolTip="选择颜色"/>

 <!--tip显示区-->
 <ItemsControl x:Name="itemsTip" Canvas.Top="-21" Canvas.Left="0" Visibility="Collapsed">
 <ItemsControl.ItemsPanel>
 <ItemsPanelTemplate>
 <StackPanel Orientation="Horizontal"/>
 </ItemsPanelTemplate>
 </ItemsControl.ItemsPanel>
 <ItemsControl.ItemTemplate>
 <DataTemplate>
 <Rectangle Fill="{Binding Color}" ToolTipService.ToolTip="{Binding Name}" Width="20" Height="20" Margin="0,0,1,0" MouseLeftButtonDown="ChangeColor"/>
 </DataTemplate>
 </ItemsControl.ItemTemplate>
 </ItemsControl>
 </Canvas>
 
 </Grid>
</UserControl>

后端代码：

using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Shapes;

namespace tooltipTest
{
 public partial class MainPage : UserControl
    {
        List<FillColor> lstTipsData;

 public MainPage()
        {
            InitializeComponent();

 //初始化数据
            lstTipsData = new List<FillColor>() { 
 new FillColor(){ Color = new SolidColorBrush(Colors.Red), Name="红色"},
 new FillColor(){ Color = new SolidColorBrush(Colors.Blue), Name="蓝色"},
 new FillColor(){ Color = new SolidColorBrush(Colors.Green),Name="绿色"},
 new FillColor(){ Color = new SolidColorBrush(Colors.Magenta), Name="洋红"},
 new FillColor(){ Color = new SolidColorBrush(Colors.Black), Name="黑色"},
 new FillColor(){ Color = new SolidColorBrush(Colors.Orange), Name="橙色"},
            };


 this.Loaded += new RoutedEventHandler(MainPage_Loaded);
        }

 void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            itemsTip.ItemsSource = lstTipsData; //数据绑定           
        }


 private void GoToEnter(object sender, MouseEventArgs e)
        {
            VisualStateManager.GoToState(this, "Enter", false);
        }

 private void GoToLeave(object sender, MouseEventArgs e)
        {
            VisualStateManager.GoToState(this, "Leave", false);
        }

 /// <summary>
 /// 点击后更换颜色
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void ChangeColor(object sender, MouseButtonEventArgs e)
        {
            rColor.Fill = (sender as Rectangle).Fill;
            VisualStateManager.GoToState(this, "Leave", false);
        }
    }

 /// <summary>
 /// 测试实体类
 /// </summary>
 public class FillColor
    {
 public SolidColorBrush Color { set; get; }
 public string Name { set; get; }
    }

}