More WIndows specific parts moved to this project

2024-11-02 20:57:13 +00:00
parent 48c63b3bb0
commit 81e39f9895
25 changed files with 528 additions and 68 deletions
@@ -0,0 +1,114 @@
+using Toolkit.Foundation;
+using Windows.Win32;
+
+namespace Toolkit.Windows;
+
+public class Taskbar(ISubscriber subscriber,
+    IPublisher publisher,
+    IDisposer disposer) :
+    ITaskbar,
+    INotificationHandler<WndProcEventArgs>,
+    INotificationHandler<PointerReleasedEventArgs>,
+    INotificationHandler<PointerMovedEventArgs>,
+    INotificationHandler<PointerDragEventArgs>
+{
+    private bool isDrag;
+    private bool isWithinBounds;
+
+    public void Dispose()
+    {
+        disposer.Dispose(this);
+        GC.SuppressFinalize(this);
+    }
+
+    public TaskbarState GetCurrentState()
+    {
+        var handle = GetHandle();
+        var state = new TaskbarState
+        {
+            Screen = Screen.FromHandle(handle)
+        };
+
+        var appBarData = PInvoke.GetAppBarData(handle);
+        PInvoke.GetAppBarPosition(ref appBarData);
+
+        state.Rect = appBarData.rect.ToRect();
+        state.Placement = (TaskbarPlacement)appBarData.uEdge;
+
+        return state;
+    }
+
+    public IntPtr GetHandle() => WindowHelper.Find("Shell_TrayWnd");
+
+    public Task Handle(WndProcEventArgs args)
+    {
+        if (args.Message == PInvoke.WM_TASKBARCREATED ||
+            args.Message == (int)WndProcMessages.WM_SETTINGCHANGE &&
+            (int)args.WParam == PInvoke.SPI_SETWORKAREA)
+        {
+            publisher.Publish<TaskbarChangedEventArgs>();
+        }
+
+        return Task.CompletedTask;
+    }
+
+    public Task Handle(PointerReleasedEventArgs args)
+    {
+        if (isDrag)
+        {
+            isDrag = false;
+        }
+
+        return Task.CompletedTask;
+    }
+
+    public Task Handle(PointerMovedEventArgs args)
+    {
+        nint taskbarHandle = GetHandle();
+        if (WindowHelper.TryGetBounds(taskbarHandle, out var rect))
+        {
+            if (args.Location.IsWithinBounds(rect))
+            {
+                if (isWithinBounds)
+                {
+                    return Task.CompletedTask;
+                }
+
+                isWithinBounds = true;
+                publisher.Publish<TaskbarEnteredEventArgs>();
+            }
+            else
+            {
+                isDrag = false;
+                isWithinBounds = false;
+            }
+        }
+
+        return Task.CompletedTask;
+    }
+
+    public Task Handle(PointerDragEventArgs args)
+    {
+        if (isWithinBounds)
+        {
+            if (isDrag)
+            {
+                publisher.Publish<TaskbarDragOverEventArgs>();
+            }
+            else
+            {
+                publisher.Publish<TaskbarDragEnterEventArgs>();
+            }
+
+            isDrag = true;
+        }
+        else
+        {
+            isDrag = false;
+        }
+
+        return Task.CompletedTask;
+    }
+
+    public void Initialize() => subscriber.Subscribe(this);
+}