Merge pull request #779 from abarth/basic_docs
Add some dartdoc to basic widgets
diff --git a/packages/flutter/lib/src/rendering/binding.dart b/packages/flutter/lib/src/rendering/binding.dart
index 158ac28..b5ba171 100644
--- a/packages/flutter/lib/src/rendering/binding.dart
+++ b/packages/flutter/lib/src/rendering/binding.dart
@@ -97,11 +97,12 @@
break;
case PointerType.MOVE:
_PointerState state = _pointers[datum.pointer];
- // If the service starts supporting hover pointers, then it must
- // also start sending us ADDED and REMOVED data points.
- // In the meantime, we only support "down" moves.
+ // If the service starts supporting hover pointers, then it must also
+ // start sending us ADDED and REMOVED data points. In the meantime, we
+ // only support "down" moves, and ignore spurious moves.
// See also: https://github.com/flutter/flutter/issues/720
- assert(state != null);
+ if (state == null)
+ break;
assert(state.down);
Offset offset = position - state.lastPosition;
state.lastPosition = position;
diff --git a/packages/flutter_sprites/lib/src/sprite_box.dart b/packages/flutter_sprites/lib/src/sprite_box.dart
index 5aaa35d..c1ea2aa 100644
--- a/packages/flutter_sprites/lib/src/sprite_box.dart
+++ b/packages/flutter_sprites/lib/src/sprite_box.dart
@@ -344,6 +344,9 @@
_rootNode._visit(canvas, totalMatrix);
// Draw physics debug
+ if (_physicsNodes == null)
+ _rebuildActionControllersAndPhysicsNodes();
+
for (PhysicsWorld world in _physicsNodes) {
if (world.drawDebug) {
canvas.setMatrix(world._debugDrawTransform.storage);
