Added CSV exporter (only for PlotItem)

exporters/CSVExporter.py

+import pyqtgraph as pg
+from pyqtgraph.Qt import QtGui, QtCore
+from Exporter import Exporter
+from pyqtgraph.parametertree import Parameter
+
+
+__all__ = ['CSVExporter']
+    
+    
+class CSVExporter(Exporter):
+    Name = "CSV from plot data"
+    windows = []
+    def __init__(self, item):
+        Exporter.__init__(self, item)
+        self.params = Parameter(name='params', type='group', children=[
+            {'name': 'separator', 'type': 'list', 'value': 'comma', 'values': ['comma', 'tab']},
+        ])
+        
+    def parameters(self):
+        return self.params
+    
+    def export(self, fileName=None):
+        
+        if not isinstance(self.item, pg.PlotItem):
+            raise Exception("Matplotlib export currently only works with plot items")
+        
+        if fileName is None:
+            self.fileSaveDialog(filter=["*.csv", "*.tsv"])
+            return
+
+        fd = open(fileName, 'w')
+        data = []
+        header = []
+        for c in self.item.curves:
+            data.append(c.getData())
+            header.extend(['x', 'y'])
+
+        if self.params['separator'] == 'comma':
+            sep = ','
+        else:
+            sep = '\t'
+            
+        fd.write(sep.join(header) + '\n')
+        i = 0
+        while True:
+            done = True
+            for d in data:
+                if i < len(d[0]):
+                    fd.write('%g%s%g%s'%(d[0][i], sep, d[1][i], sep))
+                    done = False
+                else:
+                    fd.write(' %s %s' % (sep, sep))
+            fd.write('\n')
+            if done:
+                break
+            i += 1
+        fd.close()
+
+        
+                
+