Add rudimentary drag and drop

cpdctrl_gui/ui/main_window.py

@@ -86,8 +86,26 @@ class MainWindow(QMainWindow):
         # Measurement metadata
         self.w_metadata = MetadataInput(metadata_init_dict)
         self.w_lefttab.addTab(self.w_metadata, "Measurement metadata")
+        # TODO: the call_f solution isnt pretty
+        # TODO: only accept single file?
+        class RightTab(QTabWidget):
+            def __init__(self, call_f, parent=None):
+                super().__init__(parent)
+                self.setAcceptDrops(True)
+                self.call_f = call_f
+            def dragEnterEvent(self, event):
+                if event.mimeData().hasUrls():
+                    event.accept()
+                else:
+                    event.ignore()
+            def dropEvent(self, event):
+                for url in event.mimeData().urls():
+                    file_path = url.path()[1:]
+                    if file_path.endswith("csv"):
+                        self.call_f(file_path)
+                        return
         # Right: Tabs: Script, Plot
-        self.w_right_tab = QTabWidget()
+        self.w_right_tab = RightTab(self.measurement_load)
         layout.addWidget(self.w_right_tab)
         max_data_points = AppConfig.MAIN_CFG.get_or("plot_max_data_points", 40000)
         self.w_plot = Plot(max_data_points=max_data_points)