WPF教程002 - 实现Step步骤条控件
在网上看到这么一个效果,刚好在用WPF做控件,就想着用WPF来实现一下

1、实现原理
2、控件实现
public class StepBar : ItemsControl
{
#region Constructors
static StepBar()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(StepBar), new FrameworkPropertyMetadata(typeof(StepBar)));
}
#endregion
}
public class StepBarItem : ContentControl
{
#region Constructors
static StepBarItem()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(StepBarItem), new FrameworkPropertyMetadata(typeof(StepBarItem)));
}
#endregion
}
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ec="http://schemas.microsoft.com/expression/2010/controls"
xmlns:ZUI="clr-namespace:ZdfFlatUI"
xmlns:Converters="clr-namespace:ZdfFlatUI.Converters">
<Converters:IsLastItemConverter x:Key="IsLastItemConverter" />
<Converters:IsProgressedConverter x:Key="IsProgressedConverter" />
<PathGeometry x:Key="Icon_Gou" Figures="M378.410667 850.450963C364.491852 850.450963 350.610963 845.293037 340.02963 834.939259L20.920889 523.529481C-0.279704 502.821926-0.279704 469.295407 20.920889 448.587852 42.121481 427.880296 76.48237 427.880296 97.682963 448.587852L378.410667 722.526815 925.75763 188.491852C946.958222 167.784296 981.319111 167.784296 1002.519704 188.491852 1023.720296 209.161481 1023.720296 242.688 1002.519704 263.395556L416.791704 834.939259C406.172444 845.293037 392.291556 850.450963 378.410667 850.450963L378.410667 850.450963Z" />
<Style TargetType="{x:Type ZUI:StepBarItem}">
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="FontSize" Value="14" />
<Setter Property="FontFamily" Value="宋体" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ZUI:StepBarItem}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<StackPanel Orientation="Horizontal">
<Grid Margin="0,0,10,0">
<Border x:Name="Bd" BorderBrush="#CCCCCC" Width="25" Height="25" CornerRadius="100"
BorderThickness="1" SnapsToDevicePixels="True" UseLayoutRounding="True">
</Border>
<TextBlock x:Name="Number" Text="{TemplateBinding Number}"
HorizontalAlignment="Center" VerticalAlignment="Center" />
<Path x:Name="path" Data="{StaticResource Icon_Gou}" Stretch="Uniform" Width="12" Fill="#3399FF" Visibility="Collapsed" />
</Grid>
<ContentPresenter VerticalAlignment="Center" />
</StackPanel>
<Border x:Name="Line" Grid.Column="1" BorderBrush="#E3E8EE" BorderThickness="0,1,0,0"
VerticalAlignment="Center" Margin="10,0"
SnapsToDevicePixels="True" UseLayoutRounding="True" />
</Grid>
<ControlTemplate.Triggers>
<DataTrigger Value="True">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource IsLastItemConverter}">
<Binding RelativeSource="{RelativeSource Self}" />
<Binding RelativeSource="{RelativeSource AncestorType={x:Type ZUI:StepBar}}" Path="Items.Count"/>
</MultiBinding>
</DataTrigger.Binding>
<Setter TargetName="Line" Property="Visibility" Value="Collapsed" />
</DataTrigger>
<DataTrigger Value="False">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource IsLastItemConverter}">
<Binding RelativeSource="{RelativeSource Self}" />
<Binding RelativeSource="{RelativeSource AncestorType={x:Type ZUI:StepBar}}" Path="Items.Count"/>
</MultiBinding>
</DataTrigger.Binding>
<Setter TargetName="Line" Property="Visibility" Value="Visible" />
</DataTrigger>
<DataTrigger Value="Less">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource IsProgressedConverter}">
<Binding RelativeSource="{RelativeSource Self}" />
<Binding RelativeSource="{RelativeSource AncestorType={x:Type ZUI:StepBar}}" Path="Progress"/>
</MultiBinding>
</DataTrigger.Binding>
<Setter TargetName="Bd" Property="Background" Value="#003399FF" />
<Setter TargetName="Bd" Property="BorderBrush" Value="#3399FF" />
<Setter TargetName="Number" Property="Visibility" Value="Collapsed" />
<Setter TargetName="Line" Property="BorderBrush" Value="#3399FF" />
<Setter TargetName="path" Property="Visibility" Value="Visible" />
<Setter Property="Foreground" Value="#999999" />
</DataTrigger>
<DataTrigger Value="Equal">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource IsProgressedConverter}">
<Binding RelativeSource="{RelativeSource Self}" />
<Binding RelativeSource="{RelativeSource AncestorType={x:Type ZUI:StepBar}}" Path="Progress"/>
</MultiBinding>
</DataTrigger.Binding>
<Setter TargetName="Bd" Property="Background" Value="#3399FF" />
<Setter TargetName="Bd" Property="BorderBrush" Value="#3399FF" />
<Setter TargetName="Number" Property="Visibility" Value="Visible" />
<Setter TargetName="Number" Property="Foreground" Value="#FFFFFF" />
<Setter TargetName="path" Property="Visibility" Value="Collapsed" />
<Setter Property="Foreground" Value="#666666" />
</DataTrigger>
<DataTrigger Value="Large">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource IsProgressedConverter}">
<Binding RelativeSource="{RelativeSource Self}" />
<Binding RelativeSource="{RelativeSource AncestorType={x:Type ZUI:StepBar}}" Path="Progress"/>
</MultiBinding>
</DataTrigger.Binding>
<Setter Property="Foreground" Value="#999999" />
</DataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type ZUI:StepBar}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ZUI:StepBar}">
<Border>
<ItemsPresenter />
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<UniformGrid IsItemsHost="True" Rows="1" />
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
namespace ZdfFlatUI.Converters
{
public class IsProgressedConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if ((values[0] is ContentControl && values[1] is int) == false)
{
return EnumCompare.None;
}
ContentControl contentControl = values[0] as ContentControl;
int progress = (int)values[1];
ItemsControl itemsControl = ItemsControl.ItemsControlFromItemContainer(contentControl);
if(itemsControl == null)
{
return EnumCompare.None;
}
int index = itemsControl.ItemContainerGenerator.IndexFromContainer(contentControl);
if(index < progress)
{
return EnumCompare.Less;
}
else if(index == progress)
{
return EnumCompare.Equal;
}
return EnumCompare.Large;
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotSupportedException();
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
namespace ZdfFlatUI.Converters
{
/// <summary>
/// true则隐藏,false则显示
/// </summary>
public class IsLastItemConverter : IMultiValueConverter
{
#region IValueConverter 成员
public object Convert(object[] value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
ContentControl contentPresenter = value[0] as ContentControl;
ItemsControl itemsControl = ItemsControl.ItemsControlFromItemContainer(contentPresenter);
bool flag = false;
if(itemsControl != null)
{
int index = itemsControl.ItemContainerGenerator.IndexFromContainer(contentPresenter);
flag = (index == (itemsControl.Items.Count - 1));
}
return flag;
}
public object[] ConvertBack(object value, Type[] targetType, object parameter, System.Globalization.CultureInfo culture)
{
return null;
}
#endregion
}
}
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
namespace ZdfFlatUI
{
public class StepBar : ItemsControl
{
#region Private属性
#endregion
#region 依赖属性定义
public int Progress
{
get { return (int)GetValue(ProgressProperty); }
set { SetValue(ProgressProperty, value); }
}
public static readonly DependencyProperty ProgressProperty =
DependencyProperty.Register("Progress", typeof(int), typeof(StepBar), new PropertyMetadata(0, OnProgressChangedCallback, OnProgressCoerceValueCallback));
private static object OnProgressCoerceValueCallback(DependencyObject d, object baseValue)
{
//不让Progress超出边界
StepBar stepBar = d as StepBar;
int newValue = Convert.ToInt32(baseValue);
if (newValue < 0)
{
return 0;
}
else if(newValue >= stepBar.Items.Count)
{
return stepBar.Items.Count - 1;
}
return newValue;
}
private static void OnProgressChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
}
#endregion
#region 依赖属性set get
#endregion
#region Constructors
static StepBar()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(StepBar), new FrameworkPropertyMetadata(typeof(StepBar)));
}
#endregion
#region Override方法
protected override DependencyObject GetContainerForItemOverride()
{
return new StepBarItem();
}
protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
{
//设置Item的显示数字
StepBarItem stepBarItem = element as StepBarItem;
ItemsControl itemsControl = ItemsControl.ItemsControlFromItemContainer(stepBarItem);
int index = itemsControl.ItemContainerGenerator.IndexFromContainer(stepBarItem);
stepBarItem.Number = Convert.ToString(++index);
base.PrepareContainerForItemOverride(element, item);
}
protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
{
base.OnItemsChanged(e);
//ItemsControl数量变化时,重新设置各个Item的显示的数字
for (int i = 0; i < this.Items.Count; i++)
{
StepBarItem stepBarItem = this.ItemContainerGenerator.ContainerFromIndex(i) as StepBarItem;
if(stepBarItem != null)
{
int temp = i;
stepBarItem.Number = Convert.ToString(++temp);
}
}
//进度重新回到第一个
this.Progress = 0;
}
#endregion
#region Private方法
#endregion
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
namespace ZdfFlatUI
{
public class StepBarItem : ContentControl
{
#region Private属性
#endregion
#region 依赖属性定义
public string Number
{
get { return (string)GetValue(NumberProperty); }
set { SetValue(NumberProperty, value); }
}
public static readonly DependencyProperty NumberProperty =
DependencyProperty.Register("Number", typeof(string), typeof(StepBarItem));
#endregion
#region 依赖属性set get
#endregion
#region Constructors
static StepBarItem()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(StepBarItem), new FrameworkPropertyMetadata(typeof(StepBarItem)));
}
#endregion
#region Override方法
#endregion
#region Private方法
#endregion
}
}
3、控件的具体使用
<StackPanel Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center">
<TextBlock x:Name="text" Text="{Binding ., StringFormat=当前正在进行 {0} 步}" Foreground="#957180" FontSize="14" Margin="0,0,0,20" />
<WPF.UI:StepBar x:Name="stepBar1" Width="900" Margin="0,20,0,0" />
<StackPanel Orientation="Horizontal">
<WPF.UI:FlatButton Width="70" Height="28" CornerRadius="3" Click="FlatButton_Click1" Content="Previous" Margin="10,20" />
<WPF.UI:FlatButton Width="70" Height="28" CornerRadius="3" Click="FlatButton_Click" Content="Next" Margin="10,10" />
<WPF.UI:FlatButton Width="70" Height="28" CornerRadius="3" Click="btn_AddItem" Content="Add" Margin="10,10" />
<WPF.UI:FlatButton Width="70" Height="28" CornerRadius="3" Click="btn_RemoveItem" Content="Remove" Margin="10,10" />
</StackPanel>
</StackPanel>
public partial class UCTStepBarTest : UserControl
{
private int _Step;
public int Step
{
get
{
int temp = this.stepBar.Progress;
return ++temp;
}
}
ObservableCollection<string> list = new ObservableCollection<string>();
public UCTStepBarTest()
{
InitializeComponent();
list.Add("已完成");
list.Add("进行中");
list.Add("已完成");
list.Add("进行中");
this.stepBar1.ItemsSource = list;
this.text.DataContext = Step;
}
private void FlatButton_Click(object sender, RoutedEventArgs e)
{
this.stepBar1.Progress++;
this.text.DataContext = Step;
}
private void FlatButton_Click1(object sender, RoutedEventArgs e)
{
this.stepBar1.Progress--;
this.text.DataContext = Step;
}
private void btn_AddItem(object sender, RoutedEventArgs e)
{
list.Add("进行中");
}
private void btn_RemoveItem(object sender, RoutedEventArgs e)
{
list.RemoveAt(0);
this.text.DataContext = Step;
}
}

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