package layout_test
import (
"fmt"
"image"
"time"
"gioui.org/ui"
"gioui.org/ui/layout"
)
type config struct{}
var cfg = new(config)
func ExampleInset() {
ops := new(ui.Ops)
// Loose constraints with no minimal size.
var cs layout.Constraints
cs.Width.Max = 100
cs.Height.Max = 100
// Inset all edges by 10.
inset := layout.UniformInset(ui.Dp(10))
cs = inset.Begin(cfg, ops, cs)
// Lay out a 50x50 sized widget.
dims := layoutWidget(50, 50, cs)
fmt.Println(dims.Size)
dims = inset.End(dims)
fmt.Println(dims.Size)
// Output:
// (50,50)
// (70,70)
}
func ExampleAlign() {
ops := new(ui.Ops)
// Rigid constraints with both minimum and maximum set.
cs := layout.RigidConstraints(image.Point{X: 100, Y: 100})
align := layout.Align{Alignment: layout.Center}
cs = align.Begin(ops, cs)
// Lay out a 50x50 sized widget.
dims := layoutWidget(50, 50, cs)
fmt.Println(dims.Size)
dims = align.End(dims)
fmt.Println(dims.Size)
// Output:
// (50,50)
// (100,100)
}
func ExampleFlex() {
ops := new(ui.Ops)
cs := layout.RigidConstraints(image.Point{X: 100, Y: 100})
flex := layout.Flex{}
flex.Init(ops, cs)
// Rigid 10x10 widget.
cs = flex.Rigid()
fmt.Printf("Rigid: %v\n", cs.Width)
dims := layoutWidget(10, 10, cs)
child1 := flex.End(dims)
// Child with 50% space allowance.
cs = flex.Flexible(0.5)
fmt.Printf("50%%: %v\n", cs.Width)
dims = layoutWidget(10, 10, cs)
child2 := flex.End(dims)
dims = flex.Layout(child1, child2)
// Output:
// Rigid: {0 100}
// 50%: {0 45}
}
func layoutWidget(width, height int, cs layout.Constraints) layout.Dimens {
return layout.Dimens{
Size: image.Point{
X: width,
Y: height,
},
}
}
func (config) Now() time.Time {
return time.Now()
}
func (config) Px(v ui.Value) int {
return int(v.V + .5)
}