A lot of common errors are now caught and an appropriate status message is displayed.

JLuebben · JLuebben · commit b08862c150e0 · 2016-08-22T12:22:58.000+02:00
diff --git a/floppy/graph.py b/floppy/graph.py
@@ -669,7 +669,12 @@ def __init__(self, node, cb, arg):
 
     def run(self):
         super(NodeThread, self).run()
-        self.node.run()
+        try:
+            self.node.run()
+        except:
+            print('Something bad happened in when executing {}.'.format(str(self.node)))
+            self.node.unlock
+            return
         self.node.notify()
         if self.cb:
             self.cb(self.arg)
diff --git a/floppy/painter.py b/floppy/painter.py
@@ -889,13 +889,22 @@ def close(self):
         qApp.quit()
 
     def updateStatus(self):
-        self.drawer.graph.requestRemoteStatus()
+        try:
+            self.drawer.graph.requestRemoteStatus()
+        except AttributeError:
+            self.statusBar.showMessage('Cannot Update Graph. No Interpreter Available..', 2000)
 
     def dropGraph(self):
-        self.drawer.graph.dropGraph()
+        try:
+            self.drawer.graph.dropGraph()
+        except AttributeError:
+            self.statusBar.showMessage('Cannot Drop Graph. No Interpreter Available..', 2000)
 
     def pushGraph(self):
-        self.drawer.graph.push2Runner()
+        try:
+            self.drawer.graph.push2Runner()
+        except AttributeError:
+            self.statusBar.showMessage('Cannot Push Graph. No Interpreter Available.', 2000)
 
     def killRunner(self):
         try:
@@ -911,19 +920,34 @@ def deleteNode(self):
             self.drawer.repaint()
 
     def stepRunner(self):
-        self.drawer.graph.stepRunner()
+        try:
+            self.drawer.graph.stepRunner()
+        except AttributeError:
+            self.statusBar.showMessage('Cannot Execute Graph Step. No Interpreter Available.', 2000)
 
     def gotoRunner(self):
-        self.drawer.graph.gotoRunner(1)
+        try:
+            self.drawer.graph.gotoRunner(1)
+        except AttributeError:
+            self.statusBar.showMessage('Cannot Go To Node. No Interpreter Available.', 2000)
 
     def updateRunner(self):
-        self.drawer.graph.updateRunner()
+        try:
+            self.drawer.graph.updateRunner()
+        except AttributeError:
+            self.statusBar.showMessage('Cannot Update Interpreter. No Interpreter Available.', 2000)
 
     def pauseRunner(self):
-        self.drawer.graph.pauseRunner()
+        try:
+            self.drawer.graph.pauseRunner()
+        except AttributeError:
+            self.statusBar.showMessage('Cannot Pause Interpreter. No Interpreter Available.', 2000)
 
     def unpauseRunner(self):
-        self.drawer.graph.unpauseRunner()
+        try:
+            self.drawer.graph.unpauseRunner()
+        except AttributeError:
+            self.statusBar.showMessage('Cannot Unpause Interpreter. No Interpreter Available.', 2000)
 
     def spawnRunner(self):
         print('Spawning new Runner.')
