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/TitleBar.cs
+++ b/src/Ursa/Controls/TitleBar/TitleBar.cs
@@ -0,0 +1,91 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Controls.Primitives;
+using Avalonia.Input;
+using Avalonia.Platform;
+using Irihi.Avalonia.Shared.Helpers;
+
+namespace Ursa.Controls;
+
+public class TitleBar: ContentControl
+{
+    private CaptionButtons? _captionButtons;
+    private InputElement? _background;
+    private Window? _visualRoot;
+    
+    public static readonly StyledProperty<object?> LeftContentProperty = AvaloniaProperty.Register<TitleBar, object?>(
+        nameof(LeftContent));
+
+    public object? LeftContent
+    {
+        get => GetValue(LeftContentProperty);
+        set => SetValue(LeftContentProperty, value);
+    }
+
+    public static readonly StyledProperty<object?> RightContentProperty = AvaloniaProperty.Register<TitleBar, object?>(
+        nameof(RightContent));
+
+    public object? RightContent
+    {
+        get => GetValue(RightContentProperty);
+        set => SetValue(RightContentProperty, value);
+    }
+    
+    protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
+    {
+        base.OnApplyTemplate(e);
+        this._captionButtons?.Detach();
+        this._captionButtons = e.NameScope.Get<CaptionButtons>("PART_CaptionButtons");
+        this._background = e.NameScope.Get<InputElement>("PART_Background");
+        if (!(this.VisualRoot is Window visualRoot))
+            return;
+        _visualRoot = visualRoot;
+        DoubleTappedEvent.AddHandler(OnDoubleTapped, _background);
+        PointerPressedEvent.AddHandler(OnPointerPressed, _background);
+        this._captionButtons?.Attach(visualRoot);
+        // this.UpdateSize(visualRoot);
+    }
+
+    private void OnPointerPressed(object sender, PointerPressedEventArgs e)
+    {
+        if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)
+        {
+            _visualRoot?.BeginMoveDrag(e);
+        }
+    }
+
+    private void OnDoubleTapped(object sender, TappedEventArgs e)
+    {
+        if (_visualRoot is not null)
+        {
+            if (_visualRoot.WindowState == WindowState.Maximized)
+            {
+                _visualRoot.WindowState = WindowState.Normal;
+            }
+            else
+            {
+                _visualRoot.WindowState = WindowState.Maximized;
+            }
+        }
+    }
+
+    private void UpdateSize(Window window)
+    {
+        Thickness offScreenMargin = window.OffScreenMargin;
+        var left = offScreenMargin.Left;
+        offScreenMargin = window.OffScreenMargin;
+        double top = offScreenMargin.Top;
+        offScreenMargin = window.OffScreenMargin;
+        double right = offScreenMargin.Right;
+        offScreenMargin = window.OffScreenMargin;
+        double bottom = offScreenMargin.Bottom;
+        this.Margin = new Thickness(left, top, right, bottom);
+        if (window.WindowState != WindowState.FullScreen)
+        {
+            this.Height = window.WindowDecorationMargin.Top;
+            if (this._captionButtons != null)
+                this._captionButtons.Height = this.Height;
+        }
+    }
+}