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layout,widget: transpose Constraints to use image.Points for limits

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Instead of

    type Contraints struct {
	    Width, Height Constraint
    }

use

    type Constraints struct {
	    Min, Max image.Point
    }

which leads to simpler use. For example, the Min method is trivally replaced by
the field, and the RigidConstraints constructor is no longer a net win.

API Change. Rewrites:

    gofmt -r 'gtx.Constraints.Min() -> gtx.Constraints.Min'
    gofmt -r 'gtx.Constraints.Width.Min -> gtx.Constraints.Min.X'
    gofmt -r 'gtx.Constraints.Height.Min -> gtx.Constraints.Min.Y'
    gofmt -r 'gtx.Constraints.Height.Max -> gtx.Constraints.Max.Y'
    gofmt -r 'gtx.Constraints.Width.Max -> gtx.Constraints.Max.X'

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2020-05-19 09:50:37 +02:00
parent 67a9d9e9d7
commit 7bf3265ccd
16 changed files with 99 additions and 122 deletions
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layout/example_test.go
+7 -9
View File
@@ -12,8 +12,7 @@ func ExampleInset() {
gtx := new(layout.Context)
gtx.Reset(nil, nil, image.Point{X: 100, Y: 100})
// Loose constraints with no minimal size.
gtx.Constraints.Width.Min = 0
gtx.Constraints.Height.Min = 0
gtx.Constraints.Min = image.Point{}
// Inset all edges by 10.
inset := layout.UniformInset(unit.Dp(10))
@@ -55,26 +54,25 @@ func ExampleFlex() {
layout.Flex{}.Layout(gtx,
// Rigid 10x10 widget.
layout.Rigid(func() {
fmt.Printf("Rigid: %v\n", gtx.Constraints.Width)
fmt.Printf("Rigid: %v\n", gtx.Constraints)
layoutWidget(gtx, 10, 10)
}),
// Child with 50% space allowance.
layout.Flexed(0.5, func() {
fmt.Printf("50%%: %v\n", gtx.Constraints.Width)
fmt.Printf("50%%: %v\n", gtx.Constraints)
layoutWidget(gtx, 10, 10)
}),
)
// Output:
// Rigid: {0 100}
// 50%: {45 45}
// Rigid: {(0,100) (100,100)}
// 50%: {(45,100) (45,100)}
}
func ExampleStack() {
gtx := new(layout.Context)
gtx.Reset(nil, nil, image.Point{X: 100, Y: 100})
gtx.Constraints.Width.Min = 0
gtx.Constraints.Height.Min = 0
gtx.Constraints.Min = image.Point{}
layout.Stack{}.Layout(gtx,
// Force widget to the same size as the second.
@@ -89,7 +87,7 @@ func ExampleStack() {
)
// Output:
// Expand: {{50 100} {50 100}}
// Expand: {(50,50) (100,100)}
}
func ExampleList() {