Added event capturing to containers

object.go

@@ -258,11 +258,6 @@ type TextBox interface {
 type ContainerBox interface {
 	ContentBox
 
-	// SetPropagateEvents specifies whether or not child Objects will
-	// receive user input events. It is true by default. If it is false, all
-	// user input that would otherwise be directed to a child Box is
-	// directed to this Box.
-	SetPropagateEvents (bool)
 	// SetGap sets the gap between child Objects.
 	SetGap             (image.Point)
 	// Add appends a child Object.
@@ -275,13 +270,22 @@ type ContainerBox interface {
 	Insert             (child Object, before Object)
 	// Clear removes all child Objects.
 	Clear              ()
-	// Length returns the amount of child objects.
+	// Length returns the amount of child Objects.
 	Length             () int
 	// At returns the child Object at the specified index.
 	At                 (int) Object
 	// SetLayout sets the layout of this Box. Child Objects will be
 	// positioned according to it.
 	SetLayout          (Layout)
+
+	// These methods control whether certain user input events get
+	// propagated to child Objects. If set to true, the relevant events will
+	// be sent to this container. If set to false (which is the default),
+	// the events will be sent to the appropriate child Object.
+	CaptureDND      (bool)
+	CaptureMouse    (bool)
+	CaptureScroll   (bool)
+	CaptureKeyboard (bool)
 }
 
 // LayoutHints are passed to a layout to tell it how to arrange child boxes.