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Maximum bounds for the mimic in the overlay can now be specified.

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This commit is contained in:
Andrew Wilson 2015-08-11 16:28:04 -07:00
parent c9c4852aa6
commit a1249ad2c7
1 changed files with 18 additions and 13 deletions
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31
packages/flutter/lib/widgets/mimic_overlay.dart
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@ -15,13 +15,15 @@ class MimicOverlay extends AnimatedComponent {
this.children,
this.overlay,
this.duration: const Duration(milliseconds: 200),
this.curve: linear
this.curve: linear,
this.targetRect
}) : super(key: key);
List<Widget> children;
GlobalKey overlay;
Duration duration;
Curve curve;
Rect targetRect;
void syncFields(MimicOverlay source) {
children = source.children;
@ -29,20 +31,28 @@ class MimicOverlay extends AnimatedComponent {
duration = source.duration;
_expandPerformance.duration = duration;
targetRect = source.targetRect;
_mimicBounds.end = targetRect;
if (_expandPerformance.isCompleted) {
_mimicBounds.value = _mimicBounds.end;
}
curve = source.curve;
_mimicBounds.curve = curve;
if (overlay != source.overlay) {
overlay = source.overlay;
if (_expandPerformance.isDismissed)
if (_expandPerformance.isDismissed) {
_activeOverlay = overlay;
else
} else {
_expandPerformance.reverse();
}
}
}
void initState() {
_mimicBounds = new AnimatedRect(new Rect(), curve: curve);
_mimicBounds.end = targetRect;
_expandPerformance = new AnimationPerformance()
..duration = duration
..addVariable(_mimicBounds)
@ -62,14 +72,11 @@ class MimicOverlay extends AnimatedComponent {
}
}
void _handleStackSizeChanged(Size size) {
_mimicBounds.end = Point.origin & size;
}
void _handleMimicCallback(Rect globalBounds) {
setState(() {
// TODO(abarth): We need to convert global bounds into local coordinates.
_mimicBounds.begin = globalToLocal(globalBounds.topLeft) & globalBounds.size;
_mimicBounds.begin =
globalToLocal(globalBounds.topLeft) & globalBounds.size;
_mimicBounds.value = _mimicBounds.begin;
});
_expandPerformance.forward();
@ -78,8 +85,9 @@ class MimicOverlay extends AnimatedComponent {
Widget build() {
List<Widget> layers = new List<Widget>();
if (children != null)
if (children != null) {
layers.addAll(children);
}
if (_activeOverlay != null) {
layers.add(
@ -98,9 +106,6 @@ class MimicOverlay extends AnimatedComponent {
);
}
return new SizeObserver(
callback: _handleStackSizeChanged,
child: new Stack(layers)
);
return new Stack(layers);
}
}