WPF开发经验-实现一种通用阀门控件

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所属分类:.NET技术
摘要

在设计设备界面时,经常会有一种需求,展示一个阀门,阀门有通断两种状态:


一 引入

在设计设备界面时,经常会有一种需求,展示一个阀门,阀门有通断两种状态:

 WPF开发经验-实现一种通用阀门控件

二 CommonValveControl

考虑实现一个自定义控件,CommonValveControl。

使用自定义控件比用户控件更灵活,更具扩展性,可以使用不同的样式和模板。

CommonValveControl定义两个依赖属性,Orientation表示安装展示的方向,Status表示阀门的通断状态。

public class CommonValveControl : Control {     static CommonValveControl()     {         DefaultStyleKeyProperty.OverrideMetadata(typeof(CommonValveControl), new FrameworkPropertyMetadata(typeof(CommonValveControl)));     }         public bool Status     {         get => (bool)GetValue(StatusProperty);         set => SetValue(StatusProperty, value);     }     public static readonly DependencyProperty StatusProperty = DependencyProperty.Register(        "Status",        typeof(bool),        typeof(CommonValveControl));          public Orientation ValveOrientation     {         get => (Orientation)GetValue(CommonValveOrientationProperty);         set => SetValue(CommonValveOrientationProperty, value);     }     public static readonly DependencyProperty CommonValveOrientationProperty = DependencyProperty.Register(         "ValveOrientation",         typeof(Orientation),         typeof(CommonValveControl)); }

设计CommonValveControl的样式模板,可通过设计不同的模板,以呈现出不同的效果。

通过ValveOrientation属性触发切换阀门的竖直状态和水平状态。

<Style TargetType="{x:Type local:CommonValveControl}">     <Setter Property="Cursor" Value="Hand" />     <Setter Property="Template">         <Setter.Value>             <ControlTemplate TargetType="{x:Type local:CommonValveControl}">                 <Viewbox Stretch="Fill">                     <Grid>                         <Canvas Width="40" Height="40" >                             <Ellipse Height="40" Width="40" Fill="Gray"/>                             <Ellipse x:Name="InnerEllipse" Height="30" Width="30" Canvas.Left="5" Canvas.Top="5"                              <Rectangle x:Name="Rectangle" Fill="White" RadiusX="2" RadiusY="2"/>                         </Canvas>                     </Grid>                 </Viewbox>                 <ControlTemplate.Triggers>                     <Trigger Property="Status" Value="false">                         <Setter TargetName="InnerEllipse" Property="Fill" Value="Red"/>                     </Trigger>                     <Trigger Property="Status" Value="true">                         <Setter TargetName="InnerEllipse" Property="Fill" Value="Green"/>                     </Trigger>                     <MultiTrigger>                         <MultiTrigger.Conditions>                             <Condition Property="ValveOrientation" Value="Horizontal"/>                             <Condition Property="Status" Value="false"/>                         </MultiTrigger.Conditions>                         <Setter TargetName="Rectangle" Property="Width" Value="6"/>                         <Setter TargetName="Rectangle" Property="Height" Value="30"/>                         <Setter TargetName="Rectangle" Property="Canvas.Left" Value="17"/>                         <Setter TargetName="Rectangle" Property="Canvas.Top" Value="5"/>                     </MultiTrigger>                     <MultiTrigger>                         <MultiTrigger.Conditions>                             <Condition Property="ValveOrientation" Value="Horizontal"/>                             <Condition Property="Status" Value="true"/>                         </MultiTrigger.Conditions>                         <Setter TargetName="Rectangle" Property="Width" Value="30"/>                         <Setter TargetName="Rectangle" Property="Height" Value="6"/>                         <Setter TargetName="Rectangle" Property="Canvas.Left" Value="5"/>                         <Setter TargetName="Rectangle" Property="Canvas.Top" Value="17"/>                     </MultiTrigger>                     <MultiTrigger>                         <MultiTrigger.Conditions>                             <Condition Property="ValveOrientation" Value="Vertical"/>                             <Condition Property="Status" Value="false"/>                         </MultiTrigger.Conditions>                         <Setter TargetName="Rectangle" Property="Width" Value="30"/>                         <Setter TargetName="Rectangle" Property="Height" Value="6"/>                         <Setter TargetName="Rectangle" Property="Canvas.Left" Value="5"/>                         <Setter TargetName="Rectangle" Property="Canvas.Top" Value="17"/>                     </MultiTrigger>                     <MultiTrigger>                         <MultiTrigger.Conditions>                             <Condition Property="ValveOrientation" Value="Vertical"/>                             <Condition Property="Status" Value="true"/>                         </MultiTrigger.Conditions>                         <Setter TargetName="Rectangle" Property="Width" Value="6"/>                         <Setter TargetName="Rectangle" Property="Height" Value="30"/>                         <Setter TargetName="Rectangle" Property="Canvas.Left" Value="17"/>                         <Setter TargetName="Rectangle" Property="Canvas.Top" Value="5"/>                     </MultiTrigger>                 </ControlTemplate.Triggers>             </ControlTemplate>         </Setter.Value>     </Setter> </Style>

三 效果演示

Xaml代码:

<Canvas>     <local:PipeControl Width="106" Height="14" Canvas.Left="26" Canvas.Top="53"/>     <local:PipeControl Width="14" Height="80" Canvas.Left="185" Canvas.Top="22" Orientation="Vertical"/>     <local:CommonValveControl x:Name="valve1" Status="False" ValveOrientation="Horizontal" Width="40" Height="40" Canvas.Left="60" Canvas.Top="41"/>     <local:CommonValveControl x:Name="valve2" Status="False" ValveOrientation="Vertical" Width="40" Height="40" Canvas.Left="172" Canvas.Top="41"/>     <Button Content="Open" Click="OpenButton_Click" Canvas.Left="272" Canvas.Top="15" Width="66" Height="35"/>     <Button Content="Close" Click="CloseButton_Click" Canvas.Left="272" Canvas.Top="71" Width="66" Height="35"/> </Canvas>

 后台代码:

public partial class MainWindow : Window {     public MainWindow()     {         InitializeComponent();     }      private void OpenButton_Click(object sender, RoutedEventArgs e)     {         valve1.Status = true;         valve2.Status = true;     }      private void CloseButton_Click(object sender, RoutedEventArgs e)     {         valve1.Status = false;         valve2.Status = false;     } }