38 lines
852 B
Go
38 lines
852 B
Go
package views
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import (
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"git.milar.in/milarin/gmath"
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"git.milar.in/milarin/tui"
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)
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// ConstrainView is a tui.Wrapper which constrains the dimensions of its View
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type ConstrainView struct {
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tui.WrapperTmpl
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MaxWidth int
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MaxHeight int
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}
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var _ tui.Wrapper = &ConstrainView{}
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func NewConstrainView(view tui.View, maxWidth, maxHeight int) *ConstrainView {
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v := new(ConstrainView)
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v.SetView(view)
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v.Constrain(maxWidth, maxHeight)
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return v
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}
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func (v *ConstrainView) Constrain(maxWidth, maxHeight int) {
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v.MaxWidth, v.MaxHeight = maxWidth, maxHeight
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}
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func (v *ConstrainView) Layout() (prefWidth, prefHeight int) {
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if v.View() == nil {
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return v.MaxWidth, v.MaxHeight
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}
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vw, vh := v.View().Layout()
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prefWidth = iff(vw >= 0, gmath.Min(vw, v.MaxWidth), v.MaxWidth)
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prefHeight = iff(vh >= 0, gmath.Min(vh, v.MaxHeight), v.MaxHeight)
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return
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}
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