Small change to make scans works properly. Now they can never escape the scan...

Small change to make scans works properly. Now they can never escape the scan interval and they dont run if the spinbox value is outisde region of scan. Also, they start and stop softly.

myWidgets.py

@@ -94,7 +94,7 @@ class anal_control_signal(QWidget):
         
     
     def scanEvent(self):
-        if abs(float(self.scan_step)-float(float(self.scan_sb_start.val)))<1e-6 or abs(float(self.scan_step)-float(self.scan_sb_stop.val))<1e-6:
+        if float(self.scan_step) < float(self.scan_sb_start.val)  or float(self.scan_step) > float(self.scan_sb_stop.val):
             self.scan_direction = (-1) * self.scan_direction
             
         self.scan_step = self.scan_step + self.scan_direction
@@ -106,6 +106,7 @@ class anal_control_signal(QWidget):
             self.scanpBar.setValue( 100 * float(self.scan_step-float(self.scan_sb_start.val))/float(self.scan_sb_stop.val-self.scan_sb_start.val)   )
             self.scanLabelValue.setText("%.2f" % self.scan_step + ' V')
         except ZeroDivisionError:
+            self.doScanAction()
             print('Oh dear, you might be trying to scan from 0 to 0. Plase never do that again. ')
     
     def doScanAction(self):
@@ -114,14 +115,6 @@ class anal_control_signal(QWidget):
         #self.scan_direction = -float( (self.scan_sb_stop.val-self.scan_sb_start.val)/self.scan_sb_period.val ) * 5e-3 * 2
         #self.scan_step = float(self.scan_sb_start.val)
         
-        b = float(self.scan_sb_stop.val)
-        a = float(self.scan_sb_start.val)
-        dt = 5.0e-3
-        T = float(self.scan_sb_period.val)
-        n = T/(2*dt)
-        
-        self.scan_direction = -(b-a)/n # this is the size in voltage of each step
-        self.scan_step = float(self.sb.val) # from here it beggins
         
         
         if self.ScanTimer.isActive():
@@ -130,11 +123,21 @@ class anal_control_signal(QWidget):
             self.scan_button.setStyleSheet('background-color: None')
             self.PbarTimer.stop()
             
-            self.AO.set_out(self.sb.val)
+            self.sb.setValue(self.scan_step)
+            
             
         else:
+            b = float(self.scan_sb_stop.val)
+            a = float(self.scan_sb_start.val)
+            dt = 5.0e-3
+            T = float(self.scan_sb_period.val)
+            n = T/(2*dt)
+        
+            self.scan_direction = -abs(b-a)/n # this is the size in voltage of each step
+            self.scan_step = float(self.sb.val) # from here it beggins
+        
             if self.scan_step > b or self.scan_step < a:
-                print('scan can not start outside scan range')
+                print('scan can not start outside scan range and scan start should be lower than scan stop')
             else:
                 self.scan_button.setStyleSheet("background-color: green")
                 self.ScanTimer.start(dt*1e3)