Reordered the disposal of the old resources, because of errors

Apparently this was able to lead to "widget disposed" exceptions, and
for some reason the old canvas sill stays at it's place, causing two
canvases side by side.

diff --git a/plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/editors/SimulationViewEditor.java b/plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/editors/SimulationViewEditor.java
index 2dcbaff..0420334 100644 (file)
--- a/plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/editors/SimulationViewEditor.java
+++ b/plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/editors/SimulationViewEditor.java
@@ -85,6 +85,13 @@ public class SimulationViewEditor extends EditorPart
                double offX;
                double offY;
                double zoom;
+               if (exec != null)
+                       exec.stopLiveExecution();
+               if (machine != null)
+               {
+                       machine.getMicroInstructionMemory().deregisterCellModifiedListener(currentRegisteredCellListener);
+                       machine.getClock().deregisterObserver(currentClockObserver);
+               }
                if (canvas != null)
                {
                        offX = canvas.getOffX();
@@ -97,14 +104,6 @@ public class SimulationViewEditor extends EditorPart
                        offY = 0;
                        zoom = -1;
                }
-               if (exec != null)
-                       exec.stopLiveExecution();
-
-               if (machine != null)
-               {
-                       machine.getMicroInstructionMemory().deregisterCellModifiedListener(currentRegisteredCellListener);
-                       machine.getClock().deregisterObserver(currentClockObserver);
-               }
 
                Optional<Machine> machineOptional;
                if (context != null && (machineOptional = context.getActiveMachine()).isPresent())