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ui: replace PushOp, PopOp with a StackOp

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Before this change, there was no guarantee that a PopOp matched
the intended PushOp. With a single stack operation, the client is
forced to match pop with the right push.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2019-07-16 13:41:10 +02:00
parent f9fda47d25
commit 586d33c26e
7 changed files with 50 additions and 25 deletions
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ui/layout/list.go
+3 -2
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@@ -224,13 +224,14 @@ func (l *List) Layout() Dimens {
Min: axisPoint(l.Axis, min, -ui.Inf),
Max: axisPoint(l.Axis, max, ui.Inf),
}
ui.PushOp{}.Add(ops)
var stack ui.StackOp
stack.Push(ops)
draw.RectClip(r).Add(ops)
ui.TransformOp{
Transform: ui.Offset(toPointF(axisPoint(l.Axis, transPos, cross))),
}.Add(ops)
child.macro.Add(ops)
ui.PopOp{}.Add(ops)
stack.Pop()
pos += childSize
}
atStart := l.first == 0 && l.offset <= 0