Make text wrapping an attribute

attribute.go

@@ -72,6 +72,8 @@ type AttrTextColor struct { color.Color }
 type AttrDotColor struct { color.Color }
 // AttrFace sets the font face, if the box is a TextBox.
 type AttrFace struct { font.Face }
+// AttrWrap sets if the text wraps, if the box is a TextBox.
+type AttrWrap bool
 // AttrAlign sets the alignment, if the box is a ContentBox.
 type AttrAlign struct { X, Y Align }
 // AttrOverflow sets the overflow, if the box is a ContentBox.
@@ -119,6 +121,10 @@ func ADotColor (col color.Color) AttrDotColor {
 func AFace (face font.Face) AttrFace {
 	return AttrFace { Face: face }
 }
+// AWrap is a convenience constructor for the wrap attribute.
+func AWrap (wrap bool) AttrWrap {
+	return AttrWrap(wrap)
+}
 // AAlign is a convenience constructor for the align attribute.
 func AAlign (x, y Align) AttrAlign {
 	return AttrAlign { X: x, Y: y }
@@ -210,7 +216,6 @@ func (this AttrDotColor) Equals (other Attr) bool {
 		return false
 	}
 }
-
 // Equals returns true if both attributes can reasonably be declared equal.
 func (this AttrFace) Equals (other Attr) bool {
 	if other, ok := other.(AttrFace); ok {
@@ -219,7 +224,14 @@ func (this AttrFace) Equals (other Attr) bool {
 		return false
 	}
 }
-
+// Equals returns true if both attributes can reasonably be declared equal.
+func (this AttrWrap) Equals (other Attr) bool {
+	if other, ok := other.(AttrWrap); ok {
+		return this == other
+	} else {
+		return false
+	}
+}
 // Equals returns true if both attributes can reasonably be declared equal.
 func (this AttrAlign) Equals (other Attr) bool {
 	if other, ok := other.(AttrAlign); ok {
@@ -228,7 +240,6 @@ func (this AttrAlign) Equals (other Attr) bool {
 		return false
 	}
 }
-
 // Equals returns true if both attributes can reasonably be declared equal.
 func (this AttrOverflow) Equals (other Attr) bool {
 	if other, ok := other.(AttrOverflow); ok {
@@ -237,7 +248,6 @@ func (this AttrOverflow) Equals (other Attr) bool {
 		return false
 	}
 }
-
 // Equals returns true if both attributes can reasonably be declared equal.
 func (this AttrLayout) Equals (other Attr) bool {
 	if other, ok := other.(AttrLayout); ok {
@@ -264,6 +274,7 @@ func (AttrGap)         attr () int { return  6 }
 func (AttrTextColor)   attr () int { return  7 }
 func (AttrDotColor)    attr () int { return  8 }
 func (AttrFace)        attr () int { return  9 }
-func (AttrAlign)       attr () int { return 10 }
-func (AttrOverflow)    attr () int { return 11 }
-func (AttrLayout)      attr () int { return 12 }
+func (AttrWrap)        attr () int { return 10 }
+func (AttrAlign)       attr () int { return 11 }
+func (AttrOverflow)    attr () int { return 12 }
+func (AttrLayout)      attr () int { return 13 }

object.go

@@ -169,9 +169,7 @@ type TextBox interface {
 
 	// SetText sets the text content of the Box.
 	SetText (string)
-	// SetWrap sets whether or not the text wraps.
-	SetWrap (bool)
-
+	
 	// SetSelectable sets whether or not the text content can be
 	// highlighted/selected.
 	SetSelectable (bool)