48 lines
942 B
Go
48 lines
942 B
Go
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package views
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import (
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"git.milar.in/milarin/gui"
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)
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// ConstrainView is a gui.Wrapper which constrains the dimensions of its View
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type ConstrainView struct {
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gui.WrapperTmpl
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MaxWidth int
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MaxHeight int
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}
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var _ gui.Wrapper = &ConstrainView{}
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func NewConstrainView(view gui.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(ctx gui.AppContext) (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(ctx)
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if v.MaxWidth >= 0 {
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prefWidth = iff(vw >= 0, min(vw, v.MaxWidth), v.MaxWidth)
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} else {
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prefWidth = vw
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}
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if v.MaxHeight >= 0 {
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prefHeight = iff(vh >= 0, min(vh, v.MaxHeight), v.MaxHeight)
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} else {
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prefHeight = vh
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}
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return
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}
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