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layout: simplify Stack API

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Similar to what a previous commit did for Flex, this change simplifies
Stack to just one Layout call:

	layout.Stack{}.Layout(gtx,
		layout.Stacked(func() {...}),
		layout.Expanded(func() {...}),
	)

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2019-12-12 00:26:49 +01:00
parent f60a5c7ac3
commit 7814da47a0
3 changed files with 129 additions and 122 deletions
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layout/example_test.go
+13 -14
View File
@@ -74,21 +74,20 @@ func ExampleFlex() {
func ExampleStack() {
gtx := new(layout.Context)
gtx.Reset(nil, image.Point{X: 100, Y: 100})
gtx.Constraints.Width.Min = 0
gtx.Constraints.Height.Min = 0
stack := layout.Stack{}
// Rigid 50x50 widget.
child1 := stack.Rigid(gtx, func() {
layoutWidget(gtx, 50, 50)
})
// Force widget to the same size as the first.
child2 := stack.Expand(gtx, func() {
fmt.Printf("Expand: %v\n", gtx.Constraints)
layoutWidget(gtx, 10, 10)
})
stack.Layout(gtx, child1, child2)
layout.Stack{}.Layout(gtx,
// Force widget to the same size as the second.
layout.Expanded(func() {
fmt.Printf("Expand: %v\n", gtx.Constraints)
layoutWidget(gtx, 10, 10)
}),
// Rigid 50x50 widget.
layout.Stacked(func() {
layoutWidget(gtx, 50, 50)
}),
)
// Output:
// Expand: {{50 100} {50 100}}