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gesture detector fixes

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This commit is contained in:
Nick Fisher
2022-09-07 17:40:40 +10:00
parent fd90bae53f
commit bac5c07c01
1 changed files with 17 additions and 15 deletions
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32
lib/gesture_detecting_filament_view.dart
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@@ -32,6 +32,9 @@ class _GestureDetectingFilamentViewState
GestureType.RotateCamera:Icons.rotate_90_degrees_ccw
};
// to avoid duplicating code for pan/rotate (panStart, panUpdate, panEnd, rotateStart, rotateUpdate etc)
// we have only a single function for start/update/end.
// when the gesture type is changed, these properties are updated to point to the correct function.
late Future Function(double x, double y) _functionStart;
late Future Function(double x, double y) _functionUpdate;
late Future Function() _functionEnd;
@@ -56,12 +59,13 @@ class _GestureDetectingFilamentViewState
_functionUpdate = widget.controller.panUpdate;
_functionEnd = widget.controller.panEnd;
break;
// TODO
case GestureType.PanBackground:
_functionStart = (x,y) async {
};
_functionUpdate = (x,y) async {
// print("Updating ${");
};
_functionEnd = () async {
@@ -85,33 +89,31 @@ class _GestureDetectingFilamentViewState
Positioned.fill(
child: GestureDetector(
behavior: HitTestBehavior.opaque,
onScaleStart: (d) {
onScaleStart: (d) async {
if (d.pointerCount == 2) {
widget.controller.zoomBegin();
await widget.controller.zoomEnd();
await widget.controller.zoomBegin();
} else {
_functionStart(d.focalPoint.dx, d.focalPoint.dy);
await _functionStart(d.focalPoint.dx, d.focalPoint.dy);
}
},
onScaleEnd: (d) {
onScaleEnd: (d) async {
if (d.pointerCount == 2) {
_lastScale = 0;
widget.controller.zoomEnd();
await widget.controller.zoomEnd();
} else {
_functionEnd();
await _functionEnd();
}
},
onScaleUpdate: (d) {
onScaleUpdate: (d) async {
if (d.pointerCount == 2) {
if (_lastScale == 0) {
_lastScale = d.scale;
} else {
widget.controller.zoomUpdate(d.scale > 1 ? 2 : -2);
if (_lastScale != 0) {
await widget.controller.zoomUpdate(100 * (d.scale -_lastScale));
}
} else {
// print("update ${d.focalPoint}");
print(d.focalPointDelta);
_functionUpdate(d.focalPoint.dx, d.focalPoint.dy);
await _functionUpdate(d.focalPoint.dx, d.focalPoint.dy);
}
_lastScale = d.scale;
},
child: FilamentWidget(controller: widget.controller))),
widget.showControls