0.2.5

课表组件、天气组件全面升级。

LanMontainDesktop/Behaviors/PanelIntroAnimationBehavior.cs

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+using System;
+using System.Linq;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Threading;
+
+namespace LanMontainDesktop.Behaviors;
+
+public class PanelIntroAnimationBehavior
+{
+    public static readonly AttachedProperty<bool> IsEnabledProperty =
+        AvaloniaProperty.RegisterAttached<PanelIntroAnimationBehavior, Panel, bool>("IsEnabled");
+
+    public static readonly AttachedProperty<bool> IsAnimationPlayedProperty =
+        AvaloniaProperty.RegisterAttached<PanelIntroAnimationBehavior, Control, bool>("IsAnimationPlayed");
+
+    public static readonly AttachedProperty<bool> CanPlayAnimationProperty =
+        AvaloniaProperty.RegisterAttached<PanelIntroAnimationBehavior, Control, bool>("CanPlayAnimation");
+
+    private static readonly AttachedProperty<bool> IsAnimationStartedProperty =
+        AvaloniaProperty.RegisterAttached<PanelIntroAnimationBehavior, Panel, bool>("IsAnimationStarted");
+
+    static PanelIntroAnimationBehavior()
+    {
+        IsEnabledProperty.Changed.AddClassHandler<Panel>(OnIsEnabledChanged);
+    }
+
+    public static void SetIsEnabled(Panel panel, bool value)
+    {
+        panel.SetValue(IsEnabledProperty, value);
+    }
+
+    public static bool GetIsEnabled(Panel panel)
+    {
+        return panel.GetValue(IsEnabledProperty);
+    }
+
+    public static void SetIsAnimationPlayed(Control control, bool value)
+    {
+        control.SetValue(IsAnimationPlayedProperty, value);
+    }
+
+    public static bool GetIsAnimationPlayed(Control control)
+    {
+        return control.GetValue(IsAnimationPlayedProperty);
+    }
+
+    public static void SetCanPlayAnimation(Control control, bool value)
+    {
+        control.SetValue(CanPlayAnimationProperty, value);
+    }
+
+    public static bool GetCanPlayAnimation(Control control)
+    {
+        return control.GetValue(CanPlayAnimationProperty);
+    }
+
+    private static bool GetIsAnimationStarted(Panel panel)
+    {
+        return panel.GetValue(IsAnimationStartedProperty);
+    }
+
+    private static void SetIsAnimationStarted(Panel panel, bool value)
+    {
+        panel.SetValue(IsAnimationStartedProperty, value);
+    }
+
+    private static void OnIsEnabledChanged(Panel panel, AvaloniaPropertyChangedEventArgs args)
+    {
+        if (args.NewValue is not bool isEnabled || !isEnabled || GetIsAnimationStarted(panel))
+        {
+            return;
+        }
+
+        panel.AttachedToVisualTree += OnPanelAttachedToVisualTree;
+        StartStaggerAnimation(panel);
+    }
+
+    private static void OnPanelAttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
+    {
+        if (sender is not Panel panel)
+        {
+            return;
+        }
+
+        StartStaggerAnimation(panel);
+    }
+
+    private static void StartStaggerAnimation(Panel panel)
+    {
+        if (!GetIsEnabled(panel) || GetIsAnimationStarted(panel))
+        {
+            return;
+        }
+
+        var targets = panel.Children
+            .OfType<Control>()
+            .Where(control => control.IsVisible)
+            .ToList();
+
+        foreach (var target in targets)
+        {
+            SetCanPlayAnimation(target, true);
+            SetIsAnimationPlayed(target, false);
+        }
+
+        SetIsAnimationStarted(panel, true);
+
+        var index = 0;
+        var timer = new DispatcherTimer(DispatcherPriority.Background)
+        {
+            Interval = TimeSpan.FromMilliseconds(24)
+        };
+        timer.Tick += (_, _) =>
+        {
+            if (index >= targets.Count)
+            {
+                timer.Stop();
+                return;
+            }
+
+            SetIsAnimationPlayed(targets[index], true);
+            index++;
+        };
+        timer.Start();
+    }
+}