Add ability to disable animations for widgets where that is an option…

…al extra

Fixes fyne-io#1813

app/settings.go

@@ -13,11 +13,12 @@ import (
 // SettingsSchema is used for loading and storing global settings
 type SettingsSchema struct {
 	// these items are used for global settings load
-	ThemeName    string  `json:"theme"`
-	Scale        float32 `json:"scale"`
-	PrimaryColor string  `json:"primary_color"`
-	CloudName    string  `json:"cloud_name"`
-	CloudConfig  string  `json:"cloud_config"`
+	ThemeName         string  `json:"theme"`
+	Scale             float32 `json:"scale"`
+	PrimaryColor      string  `json:"primary_color"`
+	CloudName         string  `json:"cloud_name"`
+	CloudConfig       string  `json:"cloud_config"`
+	DisableAnimations bool    `json:"no_animations"`
 }
 
 // StoragePath returns the location of the settings storage
@@ -70,6 +71,10 @@ func (s *settings) SetTheme(theme fyne.Theme) {
 	s.applyTheme(theme, s.variant)
 }
 
+func (s *settings) ShowAnimations() bool {
+	return !s.schema.DisableAnimations
+}
+
 func (s *settings) ThemeVariant() fyne.ThemeVariant {
 	return s.variant
 }

container/tabs.go

@@ -412,7 +412,7 @@ func (r *baseTabsRenderer) moveIndicator(pos fyne.Position, siz fyne.Size, anima
 	r.lastIndicatorHidden = r.indicator.Hidden
 	r.lastIndicatorMutex.Unlock()
 
-	if animate {
+	if animate && fyne.CurrentApp().Settings().ShowAnimations() {
 		r.positionAnimation = canvas.NewPositionAnimation(r.indicator.Position(), pos, canvas.DurationShort, func(p fyne.Position) {
 			r.indicator.Move(p)
 			r.indicator.Refresh()

settings.go

@@ -29,4 +29,6 @@ type Settings interface {
 
 	AddChangeListener(chan Settings)
 	BuildType() BuildType
+
+	ShowAnimations() bool
 }

test/testapp.go

@@ -207,6 +207,10 @@ func (s *testSettings) SetTheme(theme fyne.Theme) {
 	s.apply()
 }
 
+func (s *testSettings) ShowAnimations() bool {
+	return false
+}
+
 func (s *testSettings) Theme() fyne.Theme {
 	s.propertyLock.RLock()
 	defer s.propertyLock.RUnlock()

theme/themedtestapp.go

@@ -95,5 +95,9 @@ func (t *themedApp) Scale() float32 {
 	return 1.0
 }
 
+func (s *themedApp) ShowAnimations() bool {
+	return false
+}
+
 func (t *themedApp) AddChangeListener(chan fyne.Settings) {
 }

widget/button.go

@@ -261,7 +261,10 @@ func (b *Button) tapAnimation() {
 		return
 	}
 	b.tapAnim.Stop()
-	b.tapAnim.Start()
+
+	if fyne.CurrentApp().Settings().ShowAnimations() {
+		b.tapAnim.Start()
+	}
 }
 
 type buttonRenderer struct {

widget/entry.go

@@ -1560,6 +1560,9 @@ type entryContentRenderer struct {
 }
 
 func (r *entryContentRenderer) Destroy() {
+	if !fyne.CurrentApp().Settings().ShowAnimations() {
+		return
+	}
 	r.content.entry.cursorAnim.stop()
 }
 
@@ -1607,7 +1610,9 @@ func (r *entryContentRenderer) Refresh() {
 
 	if focusedAppearance {
 		r.cursor.Show()
-		r.content.entry.cursorAnim.start()
+		if fyne.CurrentApp().Settings().ShowAnimations() {
+			r.content.entry.cursorAnim.start()
+		}
 	} else {
 		r.content.entry.cursorAnim.stop()
 		r.cursor.Hide()

widget/select.go

@@ -251,7 +251,10 @@ func (s *Select) tapAnimation() {
 		return
 	}
 	s.tapAnim.Stop()
-	s.tapAnim.Start()
+
+	if fyne.CurrentApp().Settings().ShowAnimations() {
+		s.tapAnim.Start()
+	}
 }
 
 func (s *Select) updateSelected(text string) {