Slider no longer embeds tomo.ContainerBox

slider.go

@@ -6,9 +6,11 @@ import "git.tebibyte.media/tomo/tomo"
 import "git.tebibyte.media/tomo/tomo/input"
 import "git.tebibyte.media/tomo/tomo/event"
 
+var _ tomo.Object = new(Slider)
+
 // Slider is a control that selects a numeric value between 0 and 1.
 type Slider struct {
-	tomo.ContainerBox
+	box        tomo.ContainerBox
 	handle     *sliderHandle
 	layout     sliderLayout
 	dragging   bool
@@ -26,8 +28,8 @@ type sliderHandle struct {
 }
 
 func newSlider (orient string, value float64) *Slider {
-	this := &Slider {
-		ContainerBox: tomo.NewContainerBox(),
+	slider := &Slider {
+		box: tomo.NewContainerBox(),
 		handle: &sliderHandle {
 			Box: tomo.NewBox(),
 		},
@@ -38,23 +40,23 @@ func newSlider (orient string, value float64) *Slider {
 		step: 0.05,
 	}
 
-	this.Add(this.handle)
-	this.SetFocusable(true)
-	this.SetValue(value)
+	slider.handle.SetRole(tomo.R("objects", "SliderHandle"))
+	slider.handle.SetTag(orient, true)
+	slider.box.SetRole(tomo.R("objects", "Slider"))
+	slider.box.SetTag(orient, true)
 	
-	this.SetInputMask(true)
-	this.OnKeyUp(this.handleKeyUp)
-	this.OnKeyDown(this.handleKeyDown)
-	this.OnButtonDown(this.handleButtonDown)
-	this.OnButtonUp(this.handleButtonUp)
-	this.OnMouseMove(this.handleMouseMove)
-	this.OnScroll(this.handleScroll)
+	slider.box.Add(slider.handle)
+	slider.box.SetFocusable(true)
+	slider.SetValue(value)
 
-	this.handle.SetRole(tomo.R("objects", "SliderHandle"))
-	this.handle.SetTag(orient, true)
-	this.SetRole(tomo.R("objects", "Slider"))
-	this.SetTag(orient, true)
-	return this
+	slider.box.SetInputMask(true)
+	slider.box.OnKeyUp(slider.handleKeyUp)
+	slider.box.OnKeyDown(slider.handleKeyDown)
+	slider.box.OnButtonDown(slider.handleButtonDown)
+	slider.box.OnButtonUp(slider.handleButtonUp)
+	slider.box.OnMouseMove(slider.handleMouseMove)
+	slider.box.OnScroll(slider.handleScroll)
+	return slider
 }
 
 // NewVerticalSlider creates a new vertical slider with the specified value.
@@ -67,13 +69,25 @@ func NewHorizontalSlider (value float64) *Slider {
 	return newSlider("horizontal", value)
 }
 
+// GetBox returns the underlying box.
+func (this *Slider) GetBox () tomo.Box {
+	return this.box
+}
+
+// SetFocused sets whether or not this slider has keyboard focus. If set to
+// true, this method will steal focus away from whichever object currently has
+// focus.
+func (this *Slider) SetFocused (focused bool) {
+	this.box.SetFocused(focused)
+}
+
 // SetValue sets the value of the slider between 0 and 1.
 func (this *Slider) SetValue (value float64) {
 	if value < 0 { value = 0 }
 	if value > 1 { value = 1 }
 	if value == this.layout.value { return }
 	this.layout.value = value
-	this.SetAttr(tomo.ALayout(this.layout))
+	this.box.SetAttr(tomo.ALayout(this.layout))
 }
 
 // Value returns the value of the slider between 0 and 1.
@@ -102,7 +116,7 @@ func (this *Slider) handleKeyDown (key input.Key, numpad bool) bool {
 
 	switch key {
 	case input.KeyUp, input.KeyLeft:
-		if this.Window().Modifiers().Alt {
+		if this.box.Window().Modifiers().Alt {
 			this.SetValue(0)
 		} else {
 			this.SetValue(this.Value() - increment)
@@ -110,7 +124,7 @@ func (this *Slider) handleKeyDown (key input.Key, numpad bool) bool {
 		this.on.valueChange.Broadcast()
 		return true
 	case input.KeyDown, input.KeyRight:
-		if this.Window().Modifiers().Alt {
+		if this.box.Window().Modifiers().Alt {
 			this.SetValue(1)
 		} else {
 			this.SetValue(this.Value() + increment)
@@ -140,7 +154,7 @@ func (this *Slider) handleKeyUp (key input.Key, numpad bool) bool {
 }
 
 func (this *Slider) handleButtonDown (button input.Button) bool {
-	pointer := this.Window().MousePosition()
+	pointer := this.box.Window().MousePosition()
 	handle  := this.handle.Bounds()
 	
 	within := pointer.In(handle)
@@ -156,7 +170,7 @@ func (this *Slider) handleButtonDown (button input.Button) bool {
 			this.dragging   = true
 			this.dragOffset =
 				pointer.Sub(this.handle.Bounds().Min).
-				Add(this.InnerBounds().Min)
+				Add(this.box.InnerBounds().Min)
 			this.drag()
 		} else {
 			this.dragOffset = this.fallbackDragOffset()
@@ -209,8 +223,8 @@ func (this *Slider) handleScroll (x, y float64) bool {
 }
 
 func (this *Slider) drag () {
-	pointer := this.Window().MousePosition().Sub(this.dragOffset)
-	gutter  := this.InnerBounds()
+	pointer := this.box.Window().MousePosition().Sub(this.dragOffset)
+	gutter  := this.box.InnerBounds()
 	handle  := this.handle.Bounds()
 
 	if this.layout.vertical {
@@ -228,10 +242,10 @@ func (this *Slider) drag () {
 
 func (this *Slider) fallbackDragOffset () image.Point {
 	if this.layout.vertical {
-		return this.InnerBounds().Min.
+		return this.box.InnerBounds().Min.
 			Add(image.Pt(0, this.handle.Bounds().Dy() / 2))
 	} else {
-		return this.InnerBounds().Min.
+		return this.box.InnerBounds().Min.
 			Add(image.Pt(this.handle.Bounds().Dx() / 2, 0))
 	}
 }