Merge pull request #1010 from Axel-Jacobsen/develop

BarGraphItem CSV/image export

doc/source/graphicsItems/bargraphitem.rst

@@ -0,0 +1,8 @@
+BarGraphItem
+============
+
+.. autoclass:: pyqtgraph.BarGraphItem
+    :members:
+
+    .. automethod:: pyqtgraph.BarGraphItem.__init__
+

pyqtgraph/exporters/ImageExporter.py

@@ -48,7 +48,7 @@ class ImageExporter(Exporter):
     def export(self, fileName=None, toBytes=False, copy=False):
         if fileName is None and not toBytes and not copy:
             if QT_LIB in ['PySide', 'PySide2']:
-                filter = ["*."+str(f) for f in QtGui.QImageWriter.supportedImageFormats()]
+                filter = ["*."+str(f, encoding='utf-8') for f in QtGui.QImageWriter.supportedImageFormats()]
             else:
                 filter = ["*."+bytes(f).decode('utf-8') for f in QtGui.QImageWriter.supportedImageFormats()]
             preferred = ['*.png', '*.tif', '*.jpg']
@@ -105,7 +105,7 @@ class ImageExporter(Exporter):
         elif toBytes:
             return self.png
         else:
-            self.png.save(fileName)
+            return self.png.save(fileName)
         
 ImageExporter.register()        
         

pyqtgraph/graphicsItems/BarGraphItem.py

@@ -40,6 +40,7 @@ class BarGraphItem(GraphicsObject):
             y0=None,
             x1=None,
             y1=None,
+            name=None,
             height=None,
             width=None,
             pen=None,
@@ -166,3 +167,15 @@ class BarGraphItem(GraphicsObject):
         if self.picture is None:
             self.drawPicture()
         return self._shape
+
+    def implements(self, interface=None):
+        ints = ['plotData']
+        if interface is None:
+            return ints
+        return interface in ints
+
+    def name(self):
+        return self.opts.get('name', None)
+
+    def getData(self):
+        return self.opts.get('x'),  self.opts.get('height')