feat: implement title bar and caption buttons.

2024-06-26 21:04:50 +08:00
parent fd9a8668c5
commit 26873208a8
8 changed files with 379 additions and 37 deletions
--- a/src/Ursa/Controls/TitleBar/CaptionButtons.cs
+++ b/src/Ursa/Controls/TitleBar/CaptionButtons.cs
@@ -0,0 +1,75 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Metadata;
+using Avalonia.Controls.Primitives;
+using Irihi.Avalonia.Shared.Helpers;
+using Irihi.Avalonia.Shared.Reactive;
+
+namespace Ursa.Controls;
+
+[TemplatePart(PART_CloseButton, typeof (Button))]
+[TemplatePart(PART_RestoreButton, typeof (Button))]
+[TemplatePart(PART_MinimizeButton, typeof (Button))]
+[TemplatePart(PART_FullScreenButton, typeof (Button))]
+[PseudoClasses(":minimized", ":normal", ":maximized", ":fullscreen")]
+public class CaptionButtons: Avalonia.Controls.Chrome.CaptionButtons
+{
+    private const string PART_CloseButton = "PART_CloseButton";
+    private const string PART_RestoreButton = "PART_RestoreButton";
+    private const string PART_MinimizeButton = "PART_MinimizeButton";
+    private const string PART_FullScreenButton = "PART_FullScreenButton";
+
+    private Button? _closeButton;
+    private Button? _restoreButton;
+    private Button? _minimizeButton;
+    private Button? _fullScreenButton;
+    
+    private IDisposable? _visibilityDisposable;
+    
+    protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
+    {
+        _closeButton = e.NameScope.Get<Button>(PART_CloseButton);
+        _restoreButton = e.NameScope.Get<Button>(PART_RestoreButton);
+        _minimizeButton = e.NameScope.Get<Button>(PART_MinimizeButton);
+        _fullScreenButton = e.NameScope.Get<Button>(PART_FullScreenButton);
+        Button.ClickEvent.AddHandler((o, args) => OnClose(), _closeButton);
+        Button.ClickEvent.AddHandler((o, args) => OnRestore(), _restoreButton);
+        Button.ClickEvent.AddHandler((o, args) => OnMinimize(), _minimizeButton);
+        Button.ClickEvent.AddHandler((o, args) => OnToggleFullScreen(), _fullScreenButton);
+        if (this.HostWindow is not null && !HostWindow.CanResize)
+        {
+            _restoreButton.IsEnabled = false;
+        }
+        UpdateVisibility();
+    }
+
+    public override void Attach(Window hostWindow)
+    {
+        base.Attach(hostWindow);
+        _visibilityDisposable = HostWindow?.GetObservable(Window.WindowStateProperty).Subscribe((a) =>
+        {
+            UpdateVisibility();
+        });
+    }
+    
+    private void UpdateVisibility()
+    {
+        if (HostWindow is not UrsaWindow u)
+        {
+            return;
+        }
+
+        IsVisibleProperty.SetValue(u.IsCloseButtonVisible, _closeButton);
+        IsVisibleProperty.SetValue(u.WindowState != WindowState.FullScreen && u.IsRestoreButtonVisible,
+            _restoreButton);
+        IsVisibleProperty.SetValue(u.WindowState != WindowState.FullScreen && u.IsMinimizeButtonVisible,
+            _minimizeButton);
+        IsVisibleProperty.SetValue(u.IsFullScreenButtonVisible, _fullScreenButton);
+    }
+
+    public override void Detach()
+    {
+        base.Detach();
+        _visibilityDisposable?.Dispose();
+    }
+}