[plotter] eventplotter

nixview/ui/plotscreen.py

@@ -113,47 +113,95 @@ class Plotter(MplCanvas):
 
 class EventPlotter(Plotter):
 
-    def __init__(self, data_array, xdim=-1):
-        self.array = data_array
-        self.sc = None
-        self.dim_count = len(data_array.dimensions)
-        """
+    def __init__(self, file_handler, item, data_view, xdim=-1, parent=None):
+        super().__init__(file_handler, item, data_view, parent)
+        self.dim_count = len(self._dataview.full_shape)
+        
         if xdim == -1:
-            self.xdim = guess_best_xdim(self.array)
-        elif xdim > 1:
-            raise ValueError("EventPlotter: xdim is larger than 2! "
-                             "Cannot plot that kind of data")
+            self.xdim = self._item.best_xdim
         else:
             self.xdim = xdim
-        """
+        self._abs_xmin = 0
+        self._abs_xmax = self._dataview.full_shape[self.xdim]
+        self._view_xmin = 0
+        self._view_xmax = 0
+        self._zoom_level = 0
+        self._segment_length = 0
+        self.sc = None
 
-    def plot(self, axis=None):
-        if axis is None:
-            self.fig = plt.figure(figsize=[5.5, 2.])
-            self.axis = self.fig.add_axes([0.15, .2, 0.8, 0.75])
-            self.axis.set_title(self.array.name)
-        else:
-            self.fig = axis.figure
-            self.axis = axis
-        if len(self.array.dimensions) == 1:
-            return self.plot_1d()
+    @property
+    def is_full_view(self):
+        full = self._data_xmin == self._view_xmin and self._data_xmax == self._view_xmax
+        return full
+
+    @property
+    def can_pan_horizontally(self):
+        return self.can_pan_left or self.can_pan_right
+    
+    @property
+    def can_pan_left(self):
+        return self._view_xmin > self._abs_xmin
+
+    @property
+    def can_pan_right(self):
+        return self._view_xmax < self._abs_xmax
+
+    @property
+    def horizontal_pan_position(self):
+        return self._view_xmax/self._abs_xmax
+    
+    def horizontal_pan_to_position(self, new_position, zoomlevel):
+        new_xmax = int(np.min([np.ceil(new_position * self._abs_xmax), self._abs_xmax]))
+        segment_length = zoomlevel * self._abs_xmax
+        start = np.max([0, new_xmax - segment_length])
+        while not self._dataview.fully_loaded and new_xmax < self._dataview.current_shape[self.xdim]:
+            self._dataview.request_more()
+        
+        self.plot(start, zoomlevel)
+    
+    def plot(self, start=0, zoomlevel=1.0):
+        if zoomlevel > 1:
+            zoomlevel = 1.0
+        self._segment_length = zoomlevel * self._abs_xmax
+        self._zoom_level = zoomlevel
+        
+        if self.dim_count == 1:
+            return self.plot_1d(start)
         else:
-            return None
+            return None  # FIXME 2D events?
 
-    def plot_1d(self):
-        data = self.array[:]
-        xlabel = create_label(self.array.dimensions[self.xdim])
-        dim = self.array.dimensions[self.xdim]
-        if dim.dimension_type == nix.DimensionType.Range and not dim.is_alias:
-            ylabel = create_label(self.array)
+    def plot_1d(self, start=0, zoomlevel=1.0):
+        if start < 0:
+            start = 0
+        end = start + self._segment_length
+        if end > self._dataview.current_shape[self.xdim]:
+            end = self._dataview.current_shape[self.xdim]
+        y_values = self._dataview._buffer[int(start):int(end)]
+        x_values = self._file_handler.request_axis(self._item.block_id, self._item.id, 0, len(y_values), int(start))
+        data = self._dataview._buffer[:]
+        dimensions = self._file_handler.request_dimensions(self._item.block_id, self._item.id)
+
+        xlabel = create_label(dimensions[self.xdim])
+        #dim = dimensions[self.xdim]
+        #if "Range"dim.type == dRange and not dim.is_alias:
+        #    ylabel = create_label(self.array)
+        #else:
+        #    ylabel = ""
+        if self.sc is None:
+            label = self._item.name
+            self.sc = self.axis.scatter(data, np.ones(data.shape))
+            self.sc.set_pickradius(5)
         else:
-            ylabel = ""
-        self.sc = self.axis.scatter(data, np.ones(data.shape))
+            self.sc.set_data(data, np.ones(data.shape))
+            self.figure.canvas.draw_idle()
+        # self.axis.set_ylim([np.min(y_values), np.max(y_values)])
+        self.axis.set_xlim([x_values[0], x_values[-1]])
+        
         self.axis.set_ylim([0.5, 1.5])
         self.axis.set_yticks([1.])
         self.axis.set_yticklabels([])
         self.axis.set_xlabel(xlabel)
-        self.axis.set_ylabel(ylabel)
+        # self.axis.set_ylabel(ylabel)
         return self.axis
 
 
@@ -556,9 +604,15 @@ class PlotScreen(QWidget):
             self._container.set_plotter(self.plotter)
             self.plotter.plot(zoomlevel=zoom_slider_position/1000.)
             self._software_slide = False
-        if item.suggested_plotter == PlotterTypes.ImagePlotter:
+        elif item.suggested_plotter == PlotterTypes.ImagePlotter:
             self._zoom_slider.setEnabled(False)
             self._pan_slider.setEnabled(False)
             self.plotter = ImagePlotter(self._file_handler, item, self._data_view)
             self._container.set_plotter(self.plotter)
             self.plotter.plot()
+        elif item.suggested_plotter == PlotterTypes.EventPlotter:
+            self._zoom_slider.setEnabled(False)
+            self._pan_slider.setEnabled(False)
+            self.plotter = EventPlotter(self._file_handler, item, self._data_view)
+            self._container.set_plotter(self.plotter)
+            self.plotter.plot()