94f275288571009dcf32fe59b302fcf617879c42 — Elias Naur a month ago 4ce8f4e
ui/layout: add Align example

Signed-off-by: Elias Naur <mail@eliasnaur.com>
1 files changed, 29 insertions(+), 10 deletions(-)

M ui/layout/layout_test.go
M ui/layout/layout_test.go => ui/layout/layout_test.go +29 -10
@@ 13,28 13,47 @@   var cfg = new(config)
  
- var cs = layout.Constraints{
- 	Width: layout.Constraint{
- 		Max: 100,
- 	},
- 	Height: layout.Constraint{
- 		Max: 100,
- 	},
- }
- 
  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: (70,70)
+ 	// Output:
+ 	// (50,50)
+ 	// (70,70)
+ }
+ 
+ func ExampleAlign() {
+ 	ops := new(ui.Ops)
+ 
+ 	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 layoutWidget(width, height int, cs layout.Constraints) layout.Dimens {