Remove the lock from internal basewidget

internal/widget/base.go

@@ -2,7 +2,6 @@ package widget
 
 import (
 	"math"
-	"sync"
 	"sync/atomic"
 
 	"fyne.io/fyne/v2"
@@ -12,12 +11,10 @@ import (
 
 // Base provides a helper that handles basic widget behaviours.
 type Base struct {
-	hidden   bool
+	hidden   atomic.Bool
 	position atomic.Uint64
 	size     atomic.Uint64
-
-	impl         fyne.Widget
-	propertyLock sync.RWMutex
+	impl     atomic.Pointer[fyne.Widget]
 }
 
 // ExtendBaseWidget is used by an extending widget to make use of BaseWidget functionality.
@@ -27,9 +24,7 @@ func (w *Base) ExtendBaseWidget(wid fyne.Widget) {
 		return
 	}
 
-	w.propertyLock.Lock()
-	defer w.propertyLock.Unlock()
-	w.impl = wid
+	w.impl.Store(&wid)
 }
 
 // Size gets the current size of this widget.
@@ -81,10 +76,7 @@ func (w *Base) MinSize() fyne.Size {
 // Visible returns whether or not this widget should be visible.
 // Note that this may not mean it is currently visible if a parent has been hidden.
 func (w *Base) Visible() bool {
-	w.propertyLock.RLock()
-	defer w.propertyLock.RUnlock()
-
-	return !w.hidden
+	return !w.hidden.Load()
 }
 
 // Show this widget so it becomes visible
@@ -93,9 +85,11 @@ func (w *Base) Show() {
 		return
 	}
 
-	w.setFieldsAndRefresh(func() {
-		w.hidden = false
-	})
+	impl := w.super()
+	if impl == nil {
+		return
+	}
+	impl.Refresh()
 }
 
 // Hide this widget so it is no longer visible
@@ -104,11 +98,9 @@ func (w *Base) Hide() {
 		return
 	}
 
-	w.propertyLock.Lock()
-	w.hidden = true
-	impl := w.impl
-	w.propertyLock.Unlock()
+	w.hidden.Store(true)
 
+	impl := w.super()
 	if impl == nil {
 		return
 	}
@@ -126,27 +118,15 @@ func (w *Base) Refresh() {
 	render.Refresh()
 }
 
-// setFieldsAndRefresh helps to make changes to a widget that should be followed by a refresh.
-// This method is a guaranteed thread-safe way of directly manipulating widget fields.
-func (w *Base) setFieldsAndRefresh(f func()) {
-	w.propertyLock.Lock()
-	f()
-	impl := w.impl
-	w.propertyLock.Unlock()
-
-	if impl == nil {
-		return
-	}
-	impl.Refresh()
-}
-
 // super will return the actual object that this represents.
 // If extended then this is the extending widget, otherwise it is nil.
 func (w *Base) super() fyne.Widget {
-	w.propertyLock.RLock()
-	impl := w.impl
-	w.propertyLock.RUnlock()
-	return impl
+	impl := w.impl.Load()
+	if impl == nil {
+		return nil
+	}
+
+	return *impl
 }
 
 // Repaint instructs the containing canvas to redraw, even if nothing changed.