update controls for widget rotation/panning/bg image

lib/gesture_detecting_filament_view.dart

@@ -2,9 +2,15 @@ import 'package:flutter/material.dart';
 import 'filament_controller.dart';
 import 'filament_widget.dart';
 
-class GestureDetectingFilamentView extends StatefulWidget {
+enum GestureType {
-  final FilamentController controller;
+  RotateCamera,
+  PanCamera,
+  PanBackground
+}
 
+class GestureDetectingFilamentView extends StatefulWidget {
+  
+  final FilamentController controller;
   final bool showControls;
 
   const GestureDetectingFilamentView(
@@ -17,7 +23,15 @@ class GestureDetectingFilamentView extends StatefulWidget {
 
 class _GestureDetectingFilamentViewState
     extends State<GestureDetectingFilamentView> {
-  bool _rotate = false;
+  
+  GestureType gestureType = GestureType.PanCamera;
+
+  final _icons = {
+    GestureType.PanBackground:Icons.image,
+    GestureType.PanCamera:Icons.pan_tool,
+    GestureType.RotateCamera:Icons.rotate_90_degrees_ccw
+  };
+
   late Future Function(double x, double y) _functionStart;
   late Future Function(double x, double y) _functionUpdate;
   late Future Function() _functionEnd;
@@ -31,14 +45,27 @@ class _GestureDetectingFilamentViewState
   }
 
   void _setFunction() {
-    if (_rotate) {
+    switch(gestureType) {
-      _functionStart = widget.controller.rotateStart;
+      case GestureType.RotateCamera:
-      _functionUpdate = widget.controller.rotateUpdate;
+        _functionStart = widget.controller.rotateStart;
-      _functionEnd = widget.controller.rotateEnd;
+        _functionUpdate = widget.controller.rotateUpdate;
-    } else {
+        _functionEnd = widget.controller.rotateEnd;
-      _functionStart = widget.controller.panStart;
+        break;
-      _functionUpdate = widget.controller.panUpdate;
+      case GestureType.PanCamera:
-      _functionEnd = widget.controller.panEnd;
+        _functionStart = widget.controller.panStart;
+        _functionUpdate = widget.controller.panUpdate;
+        _functionEnd = widget.controller.panEnd;
+        break;
+      case GestureType.PanBackground:
+        _functionStart = (x,y) async {
+
+        };
+        _functionUpdate = (x,y) async  {
+          // print("Updating ${");
+        };
+        _functionEnd = () async {
+          
+        };
     }
   }
 
@@ -62,7 +89,6 @@ class _GestureDetectingFilamentViewState
                 if (d.pointerCount == 2) {
                   // _lastScale = d.
                 } else {
-                  // print("start ${d.focalPoint}");
                   _functionStart(d.focalPoint.dx, d.focalPoint.dy);
                 }
               },
@@ -70,7 +96,6 @@ class _GestureDetectingFilamentViewState
                 if (d.pointerCount == 2) {
                   _lastScale = 0;
                 } else {
-                  // print("end ${d.velocity}");
                   _functionEnd();
                 }
               },
@@ -79,17 +104,11 @@ class _GestureDetectingFilamentViewState
                   if (_lastScale == 0) {
                     _lastScale = d.scale;
                   } else {
-                    // var zoomFactor = ;
+                    widget.controller.zoom(d.scale > 1 ? 5 : -5);
-                    // if(zoomFactor < 0) {
-                    //   zoomFactor *= 10;
-                    // }
-                    // print(zoomFactor);
-                    print(d.horizontalScale);
-                    // print(d.focalPoint.dx);
-                    widget.controller.zoom(d.scale > 1 ? 10 : -10);
                   }
                 } else {
                   // print("update ${d.focalPoint}");
+                  print(d.focalPointDelta);
                   _functionUpdate(d.focalPoint.dx, d.focalPoint.dy);
                 }
               },
@@ -100,16 +119,15 @@ class _GestureDetectingFilamentViewState
               child: GestureDetector(
                 onTap: () {
                   setState(() {
-                    _rotate = !_rotate;
+                    var curIdx = GestureType.values.indexOf(gestureType);
+                    var nextIdx = curIdx == GestureType.values.length - 1 ? 0 : curIdx + 1 ;
+                    gestureType = GestureType.values[nextIdx];
                     _setFunction();
                   });
                 },
                 child: Container(
                     padding: const EdgeInsets.all(50),
-                    child: Icon(Icons.rotate_90_degrees_ccw,
+                    child: Icon(_icons[gestureType], color:Colors.green)),
-                        color: _rotate
-                            ? Colors.white
-                            : Colors.white.withOpacity(0.5))),
               ))
           : Container()
     ]);