using System;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Navigation;
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using System.Windows.Shapes;
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namespace XHandler.Controls
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{
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/// <summary>
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/// 按照步骤 1a 或 1b 操作，然后执行步骤 2 以在 XAML 文件中使用此自定义控件。
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///
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/// 步骤 1a) 在当前项目中存在的 XAML 文件中使用该自定义控件。
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/// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
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/// 元素中:
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///
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/// xmlns:MyNamespace="clr-namespace:WpfAppStepBar"
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///
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///
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/// 步骤 1b) 在其他项目中存在的 XAML 文件中使用该自定义控件。
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/// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
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/// 元素中:
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///
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/// xmlns:MyNamespace="clr-namespace:WpfAppStepBar;assembly=WpfAppStepBar"
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///
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/// 您还需要添加一个从 XAML 文件所在的项目到此项目的项目引用，
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/// 并重新生成以避免编译错误:
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///
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/// 在解决方案资源管理器中右击目标项目，然后依次单击
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/// “添加引用”->“项目”->[浏览查找并选择此项目]
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///
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///
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/// 步骤 2)
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/// 继续操作并在 XAML 文件中使用控件。
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///
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/// <MyNamespace:StepBar/>
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///
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/// </summary>
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public class StepBar : ItemsControl
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{
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#region Private属性
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#endregion
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#region 依赖属性定义
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public int StepIndex
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{
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get { return (int)GetValue(StepIndexProperty); }
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set { SetValue(StepIndexProperty, value); }
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}
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public static readonly DependencyProperty StepIndexProperty =
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DependencyProperty.Register("StepIndex", typeof(int), typeof(StepBar), new PropertyMetadata(0, OnStepIndexChanged));
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private static void OnProgressCoerceValueCallback(DependencyObject d, object baseValue)
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{
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//不让Progress超出边界
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StepBar stepBar = d as StepBar;
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int newValue = Convert.ToInt32(baseValue);
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//if (newValue < 0)
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//{
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// return 0;
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//}
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//else if (newValue >= stepBar.Items.Count)
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//{
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// return stepBar.Items.Count - 1;
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//}
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//return newValue;
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}
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private static void OnStepIndexChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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StepBar step = (StepBar)d;
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int stepIndex = (int)e.NewValue;
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step.UpdateStepItemState(stepIndex);
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}
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private void UpdateStepItemState(int stepIndex)
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{
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int count = Items.Count;
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if (count <= 0)
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{
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return;
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}
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for (int i = 0; i < Items.Count; i++)
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{
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if (ItemContainerGenerator.ContainerFromIndex(i) is StepBarItem stepItem)
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{
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stepItem.State = i < stepIndex ? StepState.Complete : i == stepIndex ? StepState.Busy : StepState.Default;
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int a = 0;
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}
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}
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}
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#endregion
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#region 依赖属性set get
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#endregion
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#region Constructors
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static StepBar()
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{
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DefaultStyleKeyProperty.OverrideMetadata(typeof(StepBar), new FrameworkPropertyMetadata(typeof(StepBar)));
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}
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#endregion
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#region Override方法
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protected override DependencyObject GetContainerForItemOverride()
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{
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return new StepBarItem();
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}
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protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
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{
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//设置Item的显示数字
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StepBarItem stepBarItem = element as StepBarItem;
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ItemsControl itemsControl = ItemsControl.ItemsControlFromItemContainer(stepBarItem);
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int index = itemsControl.ItemContainerGenerator.IndexFromContainer(stepBarItem);
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stepBarItem.Number = Convert.ToString(++index);
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base.PrepareContainerForItemOverride(element, item);
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UpdateStepItemState(this.StepIndex);
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}
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protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
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{
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base.OnItemsChanged(e);
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//ItemsControl数量变化时，重新设置各个Item的显示的数字
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for (int i = 0; i < this.Items.Count; i++)
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{
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StepBarItem stepBarItem = this.ItemContainerGenerator.ContainerFromIndex(i) as StepBarItem;
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if (stepBarItem != null)
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{
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int temp = i;
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stepBarItem.Number = Convert.ToString(++temp);
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}
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}
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//进度重新回到第一个
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//int a=this.StepIndex ;
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}
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#endregion
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#region Private方法
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#endregion
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public void Next()
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{
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if (StepIndex >= Items.Count)
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{
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StepIndex = Items.Count - 1;
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}
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StepIndex++;
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}
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public void Prev()
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{
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if (StepIndex < 0)
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{
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StepIndex = -1;
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}
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else
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{
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StepIndex--;
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}
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}
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}
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}
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