all: remove redundant op.TransformOp.Offset

Use op.Offset instead, or create and manipulate a f32.Affine2D.

API change. Update your code with a gofmt rule:

	gofmt -r 'op.TransformOp{}.Offset -> op.Offset'

Signed-off-by: Elias Naur <mail@eliasnaur.com>

layout/flex.go

@@ -182,7 +182,7 @@ func (f Flex) Layout(gtx Context, children ...FlexChild) Dimensions {
 			}
 		}
 		stack := op.Push(gtx.Ops)
-		op.TransformOp{}.Offset(FPt(axisPoint(f.Axis, mainSize, cross))).Add(gtx.Ops)
+		op.Offset(FPt(axisPoint(f.Axis, mainSize, cross))).Add(gtx.Ops)
 		child.call.Add(gtx.Ops)
 		stack.Pop()
 		mainSize += axisMain(f.Axis, dims.Size)

layout/layout.go

@@ -136,7 +136,7 @@ func (in Inset) Layout(gtx Context, w Widget) Dimensions {
 		mcs.Min.Y = mcs.Max.Y
 	}
 	stack := op.Push(gtx.Ops)
-	op.TransformOp{}.Offset(FPt(image.Point{X: left, Y: top})).Add(gtx.Ops)
+	op.Offset(FPt(image.Point{X: left, Y: top})).Add(gtx.Ops)
 	gtx.Constraints = mcs
 	dims := w(gtx)
 	stack.Pop()
@@ -180,7 +180,7 @@ func (a Direction) Layout(gtx Context, w Widget) Dimensions {
 		p.Y = sz.Y - dims.Size.Y
 	}
 	stack := op.Push(gtx.Ops)
-	op.TransformOp{}.Offset(FPt(p)).Add(gtx.Ops)
+	op.Offset(FPt(p)).Add(gtx.Ops)
 	call.Add(gtx.Ops)
 	stack.Pop()
 	return Dimensions{

layout/list.go

@@ -259,7 +259,7 @@ func (l *List) layout() Dimensions {
 		}
 		stack := op.Push(ops)
 		clip.Rect{Rect: FRect(r)}.Op(ops).Add(ops)
-		op.TransformOp{}.Offset(FPt(axisPoint(l.Axis, pos, cross))).Add(ops)
+		op.Offset(FPt(axisPoint(l.Axis, pos, cross))).Add(ops)
 		child.call.Add(ops)
 		stack.Pop()
 		pos += childSize

layout/stack.go

@@ -108,7 +108,7 @@ func (s Stack) Layout(gtx Context, children ...StackChild) Dimensions {
 			p.Y = maxSZ.Y - sz.Y
 		}
 		stack := op.Push(gtx.Ops)
-		op.TransformOp{}.Offset(FPt(p)).Add(gtx.Ops)
+		op.Offset(FPt(p)).Add(gtx.Ops)
 		ch.call.Add(gtx.Ops)
 		stack.Pop()
 		if baseline == 0 {