[skeletong] remove btn and some cleanup

fixtracks/widgets/skeleton.py

@@ -48,23 +48,20 @@ class SkeletonWidget(QWidget):
     #FIXME May be more efficient to set hide and show skeletons instead of adding and removing them when moving the slider
     def __init__(self, parent=None):
         super().__init__(parent)
-        self._img = None
+        self._skeletons = []
+        self._current_skeleton = None
         self._slider = QSlider(Qt.Orientation.Horizontal)
         self._slider.sliderMoved.connect(self.on_sliderMoved)
-        self._btn = QPushButton("clear")
-        self._btn.clicked.connect(self.clear)
         self._scene = QGraphicsScene()
-        self._skeletons = []
-        self._current_skeleton = None
         self._view = QGraphicsView()
         self._view.setRenderHint(QPainter.Antialiasing)
         self._view.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding)
         self._view.setMouseTracking(True)
         self._view.setScene(self._scene)
+
         lyt = QVBoxLayout()
         lyt.addWidget(self._view)
         lyt.addWidget(self._slider)
-        lyt.addWidget(self._btn)
         self.setLayout(lyt)
 
     def clear(self):
@@ -153,6 +150,9 @@ def main():
     view = SkeletonWidget()
     # view.signals.itemsSelected.connect(items_selected)
     layout.addWidget(view)
+    btn = QPushButton("clear")
+    btn.clicked.connect(view.clear)
+    layout.addWidget(btn)
     # view.addSkeleton(focus_coords[10,:,:], focus_ids[10], focus_brush)
     count = 100
     view.addSkeletons(focus_coords[:count,:,:], focus_ids[:count], focus_brush)