Half-working container flexibility propagation

element.go

@@ -16,9 +16,9 @@ type ParentHooks struct {
 	// event.
 	MinimumSizeChange func (width, height int)
 
-	// ExpandingHeightChange is called when the parameters affecting the
+	// FlexibleHeightChange is called when the parameters affecting the
 	// element's expanding height have changed.
-	ExpandingHeightChange func ()
+	FlexibleHeightChange func ()
 	
 	// SelectionRequest is called when the child element element wants
 	// itself to be selected. If the parent element chooses to grant the
@@ -46,11 +46,11 @@ func (hooks ParentHooks) RunMinimumSizeChange (width, height int) {
 	}
 }
 
-// RunExpandingHeightChange runs the ExpandingHeightChange hook if it is not
+// RunFlexibleHeightChange runs the ExpandingHeightChange hook if it is not
 // nil. If it is nil, it does nothing.
-func (hooks ParentHooks) RunExpandingHeightChange () {
-	if hooks.ExpandingHeightChange != nil {
-		hooks.ExpandingHeightChange()
+func (hooks ParentHooks) RunFlexibleHeightChange () {
+	if hooks.FlexibleHeightChange != nil {
+		hooks.FlexibleHeightChange()
 	}
 }