all: rename more *layout.Context names to gtx

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

apps/gophers/main.go

@@ -77,7 +77,7 @@ func initProfiling() {
 
 func (a *App) run() error {
 	a.ui.profiling = *stats
-	c := &layout.Context{
+	gtx := &layout.Context{
 		Queue: a.w.Queue(),
 	}
 	for {
@@ -127,9 +127,9 @@ func (a *App) run() error {
 					}
 				}
 			case app.UpdateEvent:
-				c.Reset(&e.Config, layout.RigidConstraints(e.Size))
-				a.ui.Layout(c)
-				a.w.Update(c.Ops)
+				gtx.Reset(&e.Config, layout.RigidConstraints(e.Size))
+				a.ui.Layout(gtx)
+				a.w.Update(gtx.Ops)
 			}
 		}
 	}

apps/gophers/main_test.go

@@ -19,12 +19,12 @@ func BenchmarkUI(b *testing.B) {
 	fetch := func(_ string) {}
 	u := newUI(fetch)
 	cfg := new(config)
-	c := &layout.Context{
+	gtx := &layout.Context{
 		Queue: new(queue),
 	}
 	for i := 0; i < b.N; i++ {
-		c.Reset(cfg, layout.RigidConstraints(image.Point{800, 600}))
-		u.Layout(c)
+		gtx.Reset(cfg, layout.RigidConstraints(image.Point{800, 600}))
+		u.Layout(gtx)
 	}
 }
 

ui/layout/doc.go

@@ -13,17 +13,17 @@ in an implicit Context to keep the Widget declaration short.
 
 For example, to add space above a widget:
 
-	c := &layout.Context{...}
-	c.Reset(...)
+	gtx := &layout.Context{...}
+	gtx.Reset(...)
 
 	// Configure a top inset.
 	inset := layout.Inset{Top: ui.Dp(8), ...}
 	// Use the inset to lay out a widget.
-	inset.Layout(c, func() {
+	inset.Layout(gtx, func() {
 		// Lay out widget and determine its size given the constraints.
 		...
 		dims := layout.Dimensions{...}
-		c.Dimensions = dims
+		gtx.Dimensions = dims
 	})
 
 Note that the example does not generate any garbage even though the
@@ -37,10 +37,10 @@ be created from a few generic layouts.
 This example both aligns and insets a child:
 
 	inset := layout.Inset{...}
-	inset.Layout(c, func() {
+	inset.Layout(gtx, func() {
 		align := layout.Align(...)
-		align.Layout(c, func() {
-			widget.Layout(c, ...)
+		align.Layout(gtx, func() {
+			widget.Layout(gtx, ...)
 		})
 	})
 

ui/layout/layout_test.go

@@ -17,22 +17,22 @@ var q queue
 var cfg = new(config)
 
 func ExampleInset() {
-	c := &layout.Context{Queue: q}
+	gtx := &layout.Context{Queue: q}
 	// Loose constraints with no minimal size.
 	var cs layout.Constraints
 	cs.Width.Max = 100
 	cs.Height.Max = 100
-	c.Reset(cfg, cs)
+	gtx.Reset(cfg, cs)
 
 	// Inset all edges by 10.
 	inset := layout.UniformInset(ui.Dp(10))
-	inset.Layout(c, func() {
+	inset.Layout(gtx, func() {
 		// Lay out a 50x50 sized widget.
-		layoutWidget(c, 50, 50)
-		fmt.Println(c.Dimensions.Size)
+		layoutWidget(gtx, 50, 50)
+		fmt.Println(gtx.Dimensions.Size)
 	})
 
-	fmt.Println(c.Dimensions.Size)
+	fmt.Println(gtx.Dimensions.Size)
 
 	// Output:
 	// (50,50)
@@ -40,19 +40,19 @@ func ExampleInset() {
 }
 
 func ExampleAlign() {
-	c := &layout.Context{Queue: q}
+	gtx := &layout.Context{Queue: q}
 	// Rigid constraints with both minimum and maximum set.
 	cs := layout.RigidConstraints(image.Point{X: 100, Y: 100})
-	c.Reset(cfg, cs)
+	gtx.Reset(cfg, cs)
 
 	align := layout.Align(layout.Center)
-	align.Layout(c, func() {
+	align.Layout(gtx, func() {
 		// Lay out a 50x50 sized widget.
-		layoutWidget(c, 50, 50)
-		fmt.Println(c.Dimensions.Size)
+		layoutWidget(gtx, 50, 50)
+		fmt.Println(gtx.Dimensions.Size)
 	})
 
-	fmt.Println(c.Dimensions.Size)
+	fmt.Println(gtx.Dimensions.Size)
 
 	// Output:
 	// (50,50)
@@ -60,23 +60,23 @@ func ExampleAlign() {
 }
 
 func ExampleFlex() {
-	c := &layout.Context{Queue: q}
+	gtx := &layout.Context{Queue: q}
 	cs := layout.RigidConstraints(image.Point{X: 100, Y: 100})
-	c.Reset(cfg, cs)
+	gtx.Reset(cfg, cs)
 
 	flex := layout.Flex{}
-	flex.Init(c)
+	flex.Init(gtx)
 
 	// Rigid 10x10 widget.
 	child1 := flex.Rigid(func() {
-		fmt.Printf("Rigid: %v\n", c.Constraints.Width)
-		layoutWidget(c, 10, 10)
+		fmt.Printf("Rigid: %v\n", gtx.Constraints.Width)
+		layoutWidget(gtx, 10, 10)
 	})
 
 	// Child with 50% space allowance.
 	child2 := flex.Flexible(0.5, func() {
-		fmt.Printf("50%%: %v\n", c.Constraints.Width)
-		layoutWidget(c, 10, 10)
+		fmt.Printf("50%%: %v\n", gtx.Constraints.Width)
+		layoutWidget(gtx, 10, 10)
 	})
 
 	flex.Layout(child1, child2)
@@ -87,22 +87,22 @@ func ExampleFlex() {
 }
 
 func ExampleStack() {
-	c := &layout.Context{Queue: q}
+	gtx := &layout.Context{Queue: q}
 	cs := layout.RigidConstraints(image.Point{X: 100, Y: 100})
-	c.Reset(cfg, cs)
+	gtx.Reset(cfg, cs)
 
 	stack := layout.Stack{}
-	stack.Init(c)
+	stack.Init(gtx)
 
 	// Rigid 50x50 widget.
 	child1 := stack.Rigid(func() {
-		layoutWidget(c, 50, 50)
+		layoutWidget(gtx, 50, 50)
 	})
 
 	// Force widget to the same size as the first.
 	child2 := stack.Expand(func() {
-		fmt.Printf("Expand: %v\n", c.Constraints)
-		layoutWidget(c, 10, 10)
+		fmt.Printf("Expand: %v\n", gtx.Constraints)
+		layoutWidget(gtx, 10, 10)
 	})
 
 	stack.Layout(child1, child2)
@@ -112,18 +112,18 @@ func ExampleStack() {
 }
 
 func ExampleList() {
-	c := &layout.Context{Queue: q}
+	gtx := &layout.Context{Queue: q}
 	cs := layout.RigidConstraints(image.Point{X: 100, Y: 100})
-	c.Reset(cfg, cs)
+	gtx.Reset(cfg, cs)
 
 	// The list is 1e6 elements, but only 5 fit the constraints.
 	const listLen = 1e6
 
 	var list layout.List
 	count := 0
-	list.Layout(c, listLen, func(i int) {
+	list.Layout(gtx, listLen, func(i int) {
 		count++
-		layoutWidget(c, 20, 20)
+		layoutWidget(gtx, 20, 20)
 	})
 
 	fmt.Println(count)