# Easy Chart configChart flashing? **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [December 3, 2024, 2:36am UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345 "2024-12-03T02:36:49Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![taohongyu88](https://avatars.discourse-cdn.com/v4/letter/t/f05b48/32.png) [@taohongyu88](https://forum.inductiveautomation.com/u/taohongyu88)\ **Post date:** [December 3, 2024, 2:36am UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/1 "2024-12-03T02:36:49Z")
```python def configureChart(self, chart): # Put your code here self.startDate = self.parent.startDT self.endDate = self.parent.endDT headers = ["NAME","TAG_PATH","AGGREGATION_MODE","AXIS","SUBPLOT","ENABLED","COLOR","DASH_PATTERN","RENDER_STYLE","LINE_WEIGHT","SHAPE","FILL_SHAPE","LABELS","GROUP_NAME","DIGITAL","OVERRIDE_AUTOCOLOR","HIDDEN","USER_SELECTABLE","SORT_ORDER","USER_REMOVABLE"] data = [] data.append(["LIT0101","[default]Item1/Sensors/LIT0101/SensorStatus/value","MinMax","cm","1","true","color(255,85,85,255)","","1","1.0","0","true","false","","false","false","false","true",3,"true"]) data.append(["LIT0201","[default]Item1/Sensors/LIT0201/SensorStatus/value","MinMax","cm","1","true","color(85,85,255,255)","","1","1.0","0","true","false","","false","false","false","true",2,"true"]) data.append(["LIT0202","[default]Item1/Sensors/LIT0202/SensorStatus/value","MinMax","cm","1","true","color(85,255,85,255)","","1","1.0","0","true","false","","false","false","false","true",1,"true"]) dataset = system.dataset.toDataSet(headers, data) self.tagPens = dataset ``` ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/a/6a0d4129cafe003d082b934ae1f4fdc1d19a3d8c.png) ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/3/538569b2bf24e8342b4d7df470c7ab2d925c6a9f.png) When this chart show, it always flashing? ---
**Author:** ![justinedwards.jle](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/justinedwards.jle/32/37854_2.png) [@justinedwards.jle](https://forum.inductiveautomation.com/u/justinedwards.jle)\ **Post date:** [December 3, 2024, 3:24am UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/2 "2024-12-03T03:24:02Z")
I don't believe I would do any of that in configureChart. The dataset, once saved in the designer shouldn't need to be recreated, but if it needed to be scripted at initialization for some reason, the easy chart's propertyChange event handler would be where I would put it. The code would look something like this: ```python # Run only once at initialization # componentRunning only works in the designer if preview mode is on before the window is opened if event.propertyName == 'componentRunning' and event.newValue: # Get the tag pen headers headers = list(system.dataset.getColumnHeaders(event.source.tagPens)) # Get the tag pen parameter information in some way and assemble it into a list of lists data = [ ["LIT0101","[default]Item1/Sensors/LIT0101/SensorStatus/value","MinMax","cm","1","true","color(255,85,85,255)","","1","1.0","0","true","false","","false","false","false","true",3,"true"], ["LIT0201","[default]Item1/Sensors/LIT0201/SensorStatus/value","MinMax","cm","1","true","color(85,85,255,255)","","1","1.0","0","true","false","","false","false","false","true",2,"true"], ["LIT0202","[default]Item1/Sensors/LIT0202/SensorStatus/value","MinMax","cm","1","true","color(85,255,85,255)","","1","1.0","0","true","false","","false","false","false","true",1,"true"]] # Compile the data into a dataset and assign it to the tag pens property event.source.tagPens = system.dataset.toDataSet(headers, data) ``` As for the dynamic start and end parameters, I would move this script out of configureChart and onto the parent container's `propertyChange` event handler: ```python # Validate the events, so this script only runs when the start and end date properties change if event.propertyName in ['startDT', 'endDT']: # Get the current start and end dates startDate = event.source.startDT endDate = event.source.endDT # Validate the start and end dates in some way before assigning them to the chart parameters if endDate and startDate and endDate > startDate: easyChart = event.source.parent.getComponent('Easy Chart') easyChart.startDate = startDate easyChart.endDate = endDate ``` ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [December 3, 2024, 1:27pm UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/3 "2024-12-03T13:27:12Z")
The `configureChart` method is called when the component has gathered and analyzed all of the pen data and base configuration data to plot. It gives you a chance to tweak the _ **presentation** _. Assignment to chart properties makes the component re-analyze everything, and call `configureChart` _again_. Don't assign to component properties in `configureChart`. Ever. ---
**Author:** ![taohongyu88](https://avatars.discourse-cdn.com/v4/letter/t/f05b48/32.png) [@taohongyu88](https://forum.inductiveautomation.com/u/taohongyu88)\ **Post date:** [December 5, 2024, 7:15am UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/4 "2024-12-05T07:15:57Z")
> [@pturmel](#): > > Don't assign to component properties in `configureChart`. Ever. I set the tagPens in propertyChange Script. ![69f877a94cd8f1e8f9cbc93275c0fb5](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/3/53dbd98e893da54f43d313dd3e0e0350a7dab313.png) I set DT in configChart Script. ![0984e98a6e4d1b9608c70892226b62a](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/a/5a954110296af2e6edd8953373864c6460757b26.png) Maybe it's right now! ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [December 5, 2024, 1:45pm UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/5 "2024-12-05T13:45:45Z")
No! Resetting the start/end in configureChart causes configureChart to run again. > [@pturmel](#): > > Don't assign to component properties in `configureChart`. 🤷‍♂️ ---
**Author:** ![justinedwards.jle](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/justinedwards.jle/32/37854_2.png) [@justinedwards.jle](https://forum.inductiveautomation.com/u/justinedwards.jle)\ **Post date:** [December 5, 2024, 6:05pm UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/6 "2024-12-05T18:05:20Z")
Use the parent container's property change event handler to set the start and end dates whenever the custom properties change. I assume the custom properties have some type of binding? See [my example](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/2). ---
**Author:** ![taohongyu88](https://avatars.discourse-cdn.com/v4/letter/t/f05b48/32.png) [@taohongyu88](https://forum.inductiveautomation.com/u/taohongyu88)\ **Post date:** [December 6, 2024, 2:26am UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/7 "2024-12-06T02:26:50Z")
![07d11214b1aff2dd4bdfc2b3b25ba92](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/c/1cb93e0a60a1e6e05663927baa04f76ec9f7f550.png) ```python if event.propertyName in ['startDT', 'endDT']: ``` There's nothing you said in the propertyName startDT endDT... There is startDate or endDate . ![e3f926117e144f6c11cd886e6546337](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/c/fc4dbc7f1b0fe6f456662d3830cad924ebdaf23b.png) ![a7a3a834b6944995c93f32ad3346177](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/f/eff1eb89c664cc6e4e997e1ec83ffae8fb0d7bf2.png) In this case startDate , change two times. ---
**Author:** ![justinedwards.jle](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/justinedwards.jle/32/37854_2.png) [@justinedwards.jle](https://forum.inductiveautomation.com/u/justinedwards.jle)\ **Post date:** [December 6, 2024, 4:00am UTC](https://forum.inductiveautomation.com/t/easy-chart-configchart-flashing/99345/8 "2024-12-06T04:00:59Z")
> [@taohongyu88](#): > > There's nothing you said That's because you're displaying the property change events of the easy chart itself and not the property change events of the easy chart's parent where your custom properties are. > [@justinedwards.jle](#): > > Use the **parent container's** property change event handler t > [@justinedwards.jle](#): > > , I would move this script out of configureChart and onto the **parent container's** `propertyChange` event handler