Renamed Overlay callbacks & extended interface of Overlay (must be a Control as well).

ui/overlay.go

@@ -1,6 +1,8 @@
 package ui
 
 type Overlay interface {
-	OverlayShown()
-	OverlayHidden()
+	Control
+
+	Shown()
+	Hidden()
 }

ui/overlaybase.go

@@ -0,0 +1,9 @@
+package ui
+
+type OverlayBase struct {
+	ControlBase
+}
+
+func (o *OverlayBase) Hidden() {}
+
+func (o *OverlayBase) Shown() {}

ui/overlayproxy.go

@@ -4,16 +4,16 @@ type OverlayProxy struct {
 	Proxy
 }
 
-func (p *OverlayProxy) OverlayShown() {
+func (p *OverlayProxy) Shown() {
 	overlay, ok := p.Content.(Overlay)
 	if ok {
-		overlay.OverlayShown()
+		overlay.Shown()
 	}
 }
 
-func (p *OverlayProxy) OverlayHidden() {
+func (p *OverlayProxy) Hidden() {
 	overlay, ok := p.Content.(Overlay)
 	if ok {
-		overlay.OverlayHidden()
+		overlay.Hidden()
 	}
 }

ui/overlays.go

@@ -15,7 +15,7 @@ type OverlayVisibilityChangedArgs struct {
 type Overlays struct {
 	Proxy
 
-	overlays map[string]Control
+	overlays map[string]Overlay
 	order    []string
 	visible  map[string]bool
 
@@ -28,7 +28,7 @@ func NewOverlays(over Control) *Overlays {
 	return &Overlays{
 		Proxy: Proxy{Content: over},
 
-		overlays: map[string]Control{},
+		overlays: map[string]Overlay{},
 		visible:  map[string]bool{},
 	}
 }
@@ -41,9 +41,9 @@ func (o *Overlays) setVisibility(name string, visible bool) {
 	overlay, ok := o.overlays[name].(Overlay)
 	if ok {
 		if visible {
-			overlay.OverlayShown()
+			overlay.Shown()
 		} else {
-			overlay.OverlayHidden()
+			overlay.Hidden()
 		}
 	}
 	o.visibilityChanged.Notify(OverlayVisibilityChangedArgs{Name: name, Visible: visible})
@@ -54,15 +54,15 @@ func (o *Overlays) setVisibility(name string, visible bool) {
 	}
 }
 
-func (o *Overlays) AddOnTop(name string, control Control, visible bool) {
+func (o *Overlays) AddOnTop(name string, overlay Overlay, visible bool) {
 	o.order = append(o.order, name)
-	o.overlays[name] = control
+	o.overlays[name] = overlay
 	o.visible[name] = visible
 }
 
-func (o *Overlays) AddOnBottom(name string, control Control, visible bool) {
+func (o *Overlays) AddOnBottom(name string, overlay Overlay, visible bool) {
 	o.order = append([]string{name}, o.order...)
-	o.overlays[name] = control
+	o.overlays[name] = overlay
 	o.visible[name] = visible
 }
 

ui/tooltip.go

@@ -14,7 +14,7 @@ const tooltipMouseDistance = 12
 const uiDefaultTooltipOverlay = "ui-default-tooltip"
 
 type Tooltip struct {
-	ControlBase
+	OverlayBase
 
 	Text string
 }