Display live output from running processes (#474)

* Live output of processes

* Change 'setText' to append for smoother experience + remove unecessary code

* Remove comment

---------

Co-authored-by: Spitz <[email protected]>

Author: rhinoella

gudpy/gui/widgets/core/main_window.py

@@ -1779,7 +1779,11 @@ def progressIncrementDCS(self, gudrunFile=None):
             return 0
         data = self.proc.readAllStandardOutput()
         stdout = bytes(data).decode("utf8")
-        self.output += stdout
+        if stdout:
+            self.output += stdout
+            self.outputSlots.setOutputStream(
+                stdout
+            )
         ERROR_KWDS = ["does not exist", "error", "Error"]
         if [KWD for KWD in ERROR_KWDS if KWD in stdout]:
             self.error = stdout
@@ -1843,7 +1847,11 @@ def progressIncrementPurge(self):
             return 0
         data = self.proc.readAllStandardOutput()
         stdout = bytes(data).decode("utf8")
-        self.output += stdout
+        if stdout:
+            self.output += stdout
+            self.outputSlots.setOutputStream(
+                stdout
+            )
         dataFiles = [self.gudrunFile.instrument.groupFileName]
 
         def appendDfs(dfs):

gudpy/gui/widgets/core/output_tree.py

@@ -181,7 +181,7 @@ def data(self, index, role=Qt.DisplayRole):
 class OutputTreeView(QTreeView):
 
     def __init__(self, parent):
-        super(OutputTreeView, self).__init__(parent)
+        super().__init__(parent)
 
     def buildTree(self, gudrunFile, output, parent, keyMap=None):
         self.gudrunFile = gudrunFile

gudpy/gui/widgets/slots/output_slots.py

@@ -4,6 +4,11 @@ def __init__(self, widget, parent):
         self.widget = widget
         self.parent = parent
 
+    def setOutputStream(self, stdout):
+        self.widget.outputTextEdit.append(
+            stdout
+        )
+
     def setOutput(self, output, task, gudrunFile=None, keyMap=None):
         if not gudrunFile:
             gudrunFile = self.parent.gudrunFile
@@ -12,3 +17,7 @@ def setOutput(self, output, task, gudrunFile=None, keyMap=None):
         self.widget.outputTree.buildTree(
             gudrunFile, output, self, keyMap=keyMap
         )
+        self.widget.outputTextEdit.verticalScrollBar().setValue(
+            self.widget.outputTextEdit.verticalScrollBar(
+            ).maximum()
+        )