基于Avalonia实现自定义弹窗的示例详解
目录
- 创建项目
- 创建弹窗组件
- 创建DialogManage类
- 基本使用弹窗
- 执行效果
对于使用avalonia
的时候某些功能需要到一些提示,比如异常或者成功都需要对用户进行提示,所以需要单独实现弹窗功能,并且可以自定义内部组件,这一期将手动实现一个简单的小弹窗,并且很容易自定义
创建项目
实现我们需要创建一个avalonia
MVVM的项目模板
并且取名PopoverExample
然后一直默认创建。
创建弹窗组件
在Views
文件夹中创建一个组件,选择Window模板
,创建名称Dialog
然后打开Dialog.axaml
文件,修改相关代码,
<Window XMLns="https://github.com/avaloniaui" 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" d:DesignWidth="800" d:DesignHeight="450" x:Class="Dialog.Views.DialogBase" ExtendClientAreaToDecorationsHint="True" ExtendClientAreaChromeHints="NoChrome" ExtendClientAreaTitleBarHeightHint="-1" Title="DialogBase"> <StackPanel> <Grid> <Grid HorizontalAlignment="Left"> <Textblock>标题</TextBlock> </Grid> <Grid HorizontalAlignment="Right"> <Button Click="Close_OnClick" Name="Close">关闭</Button> </Grid> </Grid> <Grid> <TextBlock Name="Content"></TextBlock> </Grid> </StackPanel> </Window>
以下代码是用于隐藏默认的标题栏的
ExtendClientAreaToDecorationsHint="True" ExtendClientAreaChromeHints="NoChrome" ExtendClientAreaTitleBarHeightHint="-1"
打开DialogBase.axaml.cs
,修改修改代码
using Avalonia; using Avalonia.Controls; using Avalonia.Interactivity; using Avalonia.Markup.Xaml; namespace Dialog.Views; public partial class DialogBase : Window { public DialogBase() { InitializeComponent(); #if DEBUG this.AttachDevTools(); #endif } p编程rivate void InitializeComponent() { AvaloniaXamlLoader.Load(this); } private void Close_OnClick(object? sender, RoutedEventArgs e) { Close(); } }
创建DialogManage类
创建Dialopythong
Manage类,用于管理Dialog
创建DialogManage.cs
,添加以下代码
using System; using System.Collections.Generic; using System.Threading.Tasks; using Avalonia; using Avalonia.Controls; using Avalonia.Threading; namespace Dialog.Views; public static class DialogManage { private static readonly Dictionary<DialogType, DialogBase> _dialog编程客栈Bases = new(); public static void Show(DialogType type, string content, int height = 100, int width = 200, int timing = 3000) { DialogBase dialog; // 防止并发可自行修改 lock (_dialogBases) { if (_dialogBases.Remove(type, out var dialogBase)) { try { dialogBase.Close(); } catch { } } dialog = new DialogBase { Height = height, Width = width, WindowstartupLocation = WindowStartupLocation.Manual // 不设置的话无法修改窗口位置 }; if (timing > 0) { // 弹窗定时关闭 _ = Task.Run(async () => { await Task.Delay(timing); // 先删除并且拿到删除的value if (_dialogBases.Remove(type, out var dialogBase)) { // 操作组件需要使用ui线程 _ = Dispatcher.UIThread.InvokeAsync(() => { try { // 关闭弹窗组件 dialogBase.Close(); } http://www.devze.com // 可能已经被关闭所以可能会出现异常 catch 开发者_JAVA开发 { } }); } }); } // 添加到字典中 _dialogBases.TryAdd(type, dialog); } // 获取当前屏幕 var bounds = dialog.Screens.ScreenFromVisual(dialog).Bounds; // 偏移 int skewing = 20; // window的任务栏高度 int taskbar = 50; int x, y; switch (type) { case DialogType.topLeft: x = skewing; y = skewing; break; case DialogType.topCenter: x = (int)((bounds.Width - dialog.Width) / 2); y = skewing; break; case DialogType.topRight: x = (int)((bounds.Width - dialog.Width) - skewing); y = skewing; break; case DialogType.leftLower: x = 20; y = (int)(bounds.Height - dialog.Height) - taskbar - skewing; break; case DialogType.centerLower: x = (int)((bounds.Width - dialog.Width) / 2); y = (int)(bounds.Height - dialog.Height) - taskbar - skewing; break; case DialogType.rightLower: x = (int)(bounds.Width - dialog.Width - skewing); y = (int)(bounds.Height - dialog.Height) - taskbar - skewing; break; default: throw new ArgumentOutOfRangeException(nameof(type), type, null); } // 设置弹窗的位置 dialog.Position = new PixelPoint(x, y); // 获取内容显示的组件并且将内容显示上去 var contentBox = dialog.Find<TextBlock>("Content"); contentBox.Text = content; dialog.Show(); } } public enum DialogType { /// <summary> /// 左上 /// </summary> topLeft, /// <summary> /// 居中靠上 /// </summary> topCenter, /// <summary> /// 右上 /// </summary> topRight, /// <summary> /// 左下 /// </summary> leftLower, /// <summary> /// 居中靠下 /// </summary> centerLower, /// <summary> /// 右下 /// </summary> rightLower }
对于弹窗组件已经完成,
基本使用弹窗
打开MainWindow.axaml
文件修改代码
<Window xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:vm="using:Dialog.ViewModels" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450" x:Class="Dialog.Views.MainWindow" Height="400" Width="400" Icon="/Assets/avalonia-logo.ico" Title="Dialog"> <Design.DataContext> <!-- This only sets the DataContext for the previewer in an IDE, to set the actual DataContext for runtime, set the DataContext property in code (look at App.axaml.cs) --> <vm:MainWindowViewModel/> </Design.DataContext> <StackPanel HorizontalAlignment="Center"> <Button Height="40" Name="OpenDialog" Click="OpenDialog_OnClick">打开新弹窗</Button> </StackPanel> </Window>
打开 MainWindow.axaml.cs
修改相关代码
using Avalonia.Controls; using Avalonia.Interactivity; namespace Dialog.Views; public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } // 定义枚举开始的值 private int i = 0; private void OpenDialog_OnClick(ophpbject? sender, RoutedEventArgs e) { // 弹窗新窗口 DialogManage.Show((DialogType)i++, "弹窗内容:" + i); // 超过枚举值重新赋值 if (i == 6) { i = 0; } } }
执行效果
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