42 lines
1.0 KiB
Go
42 lines
1.0 KiB
Go
package mujica
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import (
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"time"
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"github.com/egoist/mygo/ui"
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)
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// LayoutTransitionOptions configure a LayoutTransition.
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type LayoutTransitionOptions struct {
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// Duration of a change; zero means 200 ms.
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Duration time.Duration
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// Row lays the content in a row instead of a column.
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Row bool
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// Clip hides content outside the box while it resizes.
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Clip bool
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}
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// LayoutTransition holds content whose size and place animate from where they were (FLIP).
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// Siblings that the change moves need a LayoutTransition of their own to move in step.
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func LayoutTransition(c *ui.Context, opts LayoutTransitionOptions, content func()) *ui.Element {
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if opts.Duration < 0 {
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panic("mujica: LayoutTransition Duration is negative")
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}
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d := opts.Duration
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if d == 0 {
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d = 200 * time.Millisecond
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}
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box := ui.Column(c).AlignItems(ui.Stretch)
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if opts.Row {
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box.Row()
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}
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if opts.Clip {
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box.Clip()
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}
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box.Transition(ui.ElementTransition{Duration: d, Position: true, Size: true})
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if content != nil {
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box.Children(content)
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}
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return box
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}
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