firka/flutter
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Unmatched heroes don't need to animate

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By default now heroes won't animate if they don't find a matching hero
on the target page. You can make them animate by setting 'alwaysAnimate:
true' on the Hero constructor.
This commit is contained in:
Hixie 2015-10-22 14:32:59 -07:00
parent 33c7820d7e
commit 5c439f2b7e
1 changed files with 16 additions and 1 deletions
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17
packages/flutter/lib/src/widgets/heroes.dart
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@ -70,6 +70,7 @@ class _HeroManifest {
}
abstract class HeroHandle {
bool get alwaysAnimate;
_HeroManifest _takeChild(Rect animationArea);
}
@ -78,7 +79,8 @@ class Hero extends StatefulComponent {
Key key,
this.tag,
this.child,
this.turns: 1
this.turns: 1,
this.alwaysAnimate: false
}) : super(key: key) {
assert(tag != null);
}
@ -87,6 +89,12 @@ class Hero extends StatefulComponent {
final Widget child;
final int turns;
/// If true, the hero will always animate, even if it has no matching hero to
/// animate to or from. (This only applies if the hero is relevant; if there
/// are multiple heroes with the same tag, only the one whose key matches the
/// "most valuable keys" will be used.)
final bool alwaysAnimate;
static Map<Object, HeroHandle> of(BuildContext context, Set<Key> mostValuableKeys) {
mostValuableKeys ??= new Set<Key>();
assert(!mostValuableKeys.contains(null));
@ -143,6 +151,8 @@ class HeroState extends State<Hero> implements HeroHandle {
_HeroMode _mode = _HeroMode.constructing;
Size _size;
bool get alwaysAnimate => config.alwaysAnimate;
_HeroManifest _takeChild(Rect animationArea) {
assert(_mode == _HeroMode.measured || _mode == _HeroMode.taken);
final RenderBox renderObject = context.findRenderObject();
@ -235,6 +245,8 @@ class _HeroQuestState implements HeroHandle {
final AnimatedRelativeRectValue currentRect;
final AnimatedValue<double> currentTurns;
bool get alwaysAnimate => true;
bool get taken => _taken;
bool _taken = false;
_HeroManifest _takeChild(Rect animationArea) {
@ -319,6 +331,9 @@ class HeroParty {
final List<_HeroQuestState> _newHeroes = <_HeroQuestState>[];
for (_HeroMatch heroPair in heroes.values) {
assert(heroPair.from != null || heroPair.to != null);
if ((heroPair.from == null && !heroPair.to.alwaysAnimate) ||
(heroPair.to == null && !heroPair.from.alwaysAnimate))
continue;
_HeroManifest from = heroPair.from?._takeChild(animationArea);
assert(heroPair.to == null || heroPair.to is HeroState);
_HeroManifest to = heroPair.to?._takeChild(animationArea);