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Popup 是一个用于显示临时性内容的控件,它可以在应用程序的其他内容之上显示一个弹出窗口。它通常用于实现下拉菜单、工具提示、通知消息等功能。
主要属性为:
Child:获取或设置 Popup控件的内容。
IsOpen:获取或设置一个值,该值指示Popup 是否可见
Placement:获取或设置 Popup 控件打开时的控件方向,并指定Popup 控件在与屏幕边界重叠时的控件行为
PlacementTarget:获取或设置当打开 Popup 控件时该控件相对于其放置的元素。
PopupAnimation:获取或设置Popup 控件的打开和关闭动画。
StaysOpen:获取或设置一个值,该值指示当 Popup 控件焦点不再对准时,是否关闭该控件。
案例:
PopupBox.xaml- <<strong>Popup</strong> x:Class="WPF.Common.Dialog.PopupBox"
- xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
- xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
- xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
- xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
- xmlns:local="clr-namespace:WPF.Common.Dialog"
- mc:Ignorable="d"
- d:DesignHeight="450" d:DesignWidth="800">
- <Grid>
- <Border x:Name="border" Background="Gray" CornerRadius="8" MinHeight="35" Width="400" Height="100">
- <TextBlock TextWrapping="WrapWithOverflow"
- Foreground="White"
- Margin="10"
- FontSize="18"
- HorizontalAlignment="Center"
- VerticalAlignment="Center"
- Text="{Binding Path=Message,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=local:PopupBox},UpdateSourceTrigger=PropertyChanged}"/>
- </Border>
- </Grid>
- </Popup>
复制代码 PopupBox.xaml.cs- /// <summary>
- /// PopupBox.xaml 的交互逻辑
- /// </summary>
- public partial class PopupBox : <strong>Popup</strong>
- {
- private static PopupBox dialog = new PopupBox();
- private static DispatcherTimer timer = new DispatcherTimer();
- public PopupBox()
- {
- InitializeComponent();
- }
- /// <summary>
- /// 弹出对话框
- /// </summary>
- /// <param name="message">消息</param>
- /// <param name="owner">所属窗体对象</param>
- /// <param name="seconds">对话框隐藏倒计时(秒)</param>
- public static void Show(string message, Window owner = null, int seconds = 1)
- {
- try
- {
- Application.Current.Dispatcher.Invoke(new Action(() =>
- {
- if (owner == null)
- {
- owner = Application.Current.MainWindow;
- }
- dialog.Message = message;
- dialog.PlacementTarget = owner;
- dialog.Placement = PlacementMode.Center;
- dialog.StaysOpen = true;
- dialog.AllowsTransparency = true;
- dialog.VerticalOffset = owner.ActualHeight / 3;
- dialog.Opacity = 0.9;
- dialog.IsOpen = true;
- timer.Tick -= Timer_Tick;
- timer.Tick += Timer_Tick;
- timer.Interval = new TimeSpan(0, 0, seconds);
- timer.Start();
- }));
- }
- catch
- {
- }
- }
- private static void Timer_Tick(object sender, EventArgs e)
- {
- timer.Stop();
- Task.Run(() =>
- {
- try
- {
- for (int i = 0; i < 100; i++)
- {
- Thread.Sleep(5);
- if (Application.Current == null) return;
- Application.Current.Dispatcher.Invoke(() =>
- {
- dialog.Opacity -= 0.01;
- });
- }
- Application.Current.Dispatcher.Invoke(() =>
- {
- dialog.IsOpen = false;
- dialog.Message = string.Empty;
- });
- }
- catch
- {
- }
- });
- }
- /// <summary>
- /// 依赖属性--透明度
- /// </summary>
- public new double Opacity
- {
- get { return (double)GetValue(OpacityProperty); }
- set { SetValue(OpacityProperty, value); }
- }
- public static new readonly DependencyProperty OpacityProperty =
- DependencyProperty.Register("Opacity", typeof(double), typeof(PopupBox), new PropertyMetadata(1.0, new PropertyChangedCallback(OnOpacityPropertyChangedCallback)));
- private static void OnOpacityPropertyChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
- {
- if (!(d is PopupBox box)) return;
- if (!(e.NewValue is double v)) return;
- box.border.Opacity = v;//赋值新的透明度
- }
- /// <summary>
- /// 依赖属性--消息
- /// </summary>
- public string Message
- {
- get { return (string)GetValue(MessageProperty); }
- set { SetValue(MessageProperty, value); }
- }
- public static readonly DependencyProperty MessageProperty =
- DependencyProperty.Register("Message", typeof(string), typeof(PopupBox), new PropertyMetadata(string.Empty));
- }
复制代码
来源:https://www.cnblogs.com/MingQiu/p/18005673
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