Add function to change the checked state (#113)

widget/check.go

@@ -74,6 +74,21 @@ type Check struct {
 	OnChanged func(bool) `json:"-"`
 }
 
+// SetChecked sets the the checked state and refreshes widget
+func (c *Check) SetChecked(checked bool) {
+	if checked == c.Checked {
+		return
+	}
+
+	c.Checked = checked
+
+	if c.OnChanged != nil {
+		c.OnChanged(c.Checked)
+	}
+
+	Refresh(c)
+}
+
 // Resize sets a new size for a widget.
 // Note this should not be used if the widget is being managed by a Layout within a Container.
 func (c *Check) Resize(size fyne.Size) {
@@ -103,12 +118,7 @@ func (c *Check) Hide() {
 
 // Tapped is called when a pointer tapped event is captured and triggers any change handler
 func (c *Check) Tapped(*fyne.PointEvent) {
-	c.Checked = !c.Checked
-
-	if c.OnChanged != nil {
-		c.OnChanged(c.Checked)
-	}
-	Refresh(c)
+	c.SetChecked(!c.Checked)
 }
 
 // TappedSecondary is called when a secondary pointer tapped event is captured

widget/check_test.go

@@ -36,3 +36,38 @@ func TestCheckUnChecked(t *testing.T) {
 
 	assert.False(t, checked)
 }
+
+func TestCheckIsDisabledByDefault(t *testing.T) {
+	checkedStateFromCallback := false
+	NewCheck("", func(on bool) {
+		checkedStateFromCallback = on
+	})
+
+	assert.False(t, checkedStateFromCallback)
+}
+
+func TestCheckIsEnabledAfterUpdating(t *testing.T) {
+	checkedStateFromCallback := false
+	check := NewCheck("", func(on bool) {
+		checkedStateFromCallback = on
+	})
+
+	check.SetChecked(true)
+
+	assert.True(t, checkedStateFromCallback)
+}
+
+func TestCheckStateIsCorrectAfterMultipleUpdates(t *testing.T) {
+	checkedStateFromCallback := false
+	check := NewCheck("", func(on bool) {
+		checkedStateFromCallback = on
+	})
+
+	expectedCheckedState := false
+	for i := 0; i < 5; i++ {
+		check.SetChecked(expectedCheckedState)
+		assert.True(t, checkedStateFromCallback == expectedCheckedState)
+
+		expectedCheckedState = !expectedCheckedState
+	}
+}