mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 07:35:40 +00:00
Chris Waldon
99d0332067
Previously, a bug in the ListStyle could result in items being passed a negative value in the minimum constraints. Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>
72 lines
2.1 KiB
Go
72 lines
2.1 KiB
Go
package material_test
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import (
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"image"
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"testing"
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"time"
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"gioui.org/font/gofont"
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"gioui.org/io/system"
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"gioui.org/layout"
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"gioui.org/op"
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"gioui.org/unit"
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"gioui.org/widget"
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"gioui.org/widget/material"
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)
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func TestListAnchorStrategies(t *testing.T) {
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var ops op.Ops
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gtx := layout.NewContext(&ops, system.FrameEvent{
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Metric: unit.Metric{
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PxPerDp: 1,
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PxPerSp: 1,
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},
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Now: time.Now(),
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Size: image.Point{
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X: 500,
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Y: 500,
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},
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})
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gtx.Constraints.Min = image.Point{}
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var spaceConstraints layout.Constraints
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space := func(gtx layout.Context, index int) layout.Dimensions {
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spaceConstraints = gtx.Constraints
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if spaceConstraints.Min.X < 0 || spaceConstraints.Min.Y < 0 ||
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spaceConstraints.Max.X < 0 || spaceConstraints.Max.Y < 0 {
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t.Errorf("invalid constraints at index %d: %#+v", index, spaceConstraints)
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}
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return layout.Dimensions{Size: image.Point{
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X: gtx.Constraints.Max.X,
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Y: gtx.Px(unit.Dp(20)),
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}}
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}
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var list widget.List
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list.Axis = layout.Vertical
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elements := 100
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th := material.NewTheme(gofont.Collection())
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materialList := material.List(th, &list)
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indicatorWidth := gtx.Px(materialList.Width(gtx.Metric))
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materialList.AnchorStrategy = material.Occupy
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occupyDims := materialList.Layout(gtx, elements, space)
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occupyConstraints := spaceConstraints
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materialList.AnchorStrategy = material.Overlay
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overlayDims := materialList.Layout(gtx, elements, space)
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overlayConstraints := spaceConstraints
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// Both anchor strategies should use all space available if their elements do.
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if occupyDims != overlayDims {
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t.Errorf("expected occupy dims (%v) to be equal to overlay dims (%v)", occupyDims, overlayDims)
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}
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// The overlay strategy should not reserve any space for the scroll indicator,
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// so the constraints that it presents to its elements should be larger than
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// those presented by the occupy strategy.
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if overlayConstraints.Max.X != occupyConstraints.Max.X+indicatorWidth {
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t.Errorf("overlay max width (%d) != occupy max width (%d) + indicator width (%d)",
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overlayConstraints.Max.X, occupyConstraints.Max.X, indicatorWidth)
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}
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}
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