# onDoubleClick Extension Function **URL:** \ **Category:** Ignition\ **Created:** [May 8, 2018, 3:36pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961 "2018-05-08T15:36:44Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\ **Post date:** [May 8, 2018, 3:36pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/1 "2018-05-08T15:36:44Z")
I know this might be trivial for you guys, but how do I set the value of a label to the value of a power table cell on double click? Also, where can I find a list of scripting functions? Thanks. ---
**Author:** ![Stuart](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Stuart](https://forum.inductiveautomation.com/u/Stuart)\ **Post date:** [May 8, 2018, 4:08pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/2 "2018-05-08T16:08:21Z")
> [@dkhayes117](#): > > Also, where can I find a list of scripting functions? [Take a look at the Extension Function section for Power Tables in the manual.](https://docs.inductiveautomation.com/display/DOC79/Power+Table) ---
**Author:** ![Stuart](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Stuart](https://forum.inductiveautomation.com/u/Stuart)\ **Post date:** [May 8, 2018, 4:20pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/3 "2018-05-08T16:20:22Z")
> [@dkhayes117](#): > > how do I set the value of a label to the value of a power table cell on double click? As for this.. If the table and the label are at the same level, just add the following to the _OnDoubleClick_ extension function of the table. `self.parent.getComponent('Label').text = value` This will take the value that is double clicked on, and write it to the text property of the label component named "Label". Ctrl+J will open the Component Scripting window, FYI. ---
**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\ **Post date:** [May 8, 2018, 5:00pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/4 "2018-05-08T17:00:42Z")
> [@Stuart](#): > > self.parent.getComponent('Label').text = value Thanks, this is what I tried and didn't work ```auto event.source.parent.getComponent('Label').text = value ``` ---
**Author:** ![JGJohnson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jgjohnson/32/29582_2.png) [@JGJohnson](https://forum.inductiveautomation.com/u/JGJohnson)\ **Post date:** [May 8, 2018, 6:15pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/5 "2018-05-08T18:15:41Z")
There is no **event** object in the extension functions, you must use **self** instead. Compare your script to the one posted by Stuart. Stuarts script should work. ---
**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\ **Post date:** [May 8, 2018, 6:16pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/6 "2018-05-08T18:16:53Z")
It did, I was just showing him what I had tried before I posted the question ---
**Author:** ![hachjessed](https://avatars.discourse-cdn.com/v4/letter/h/7ab992/32.png) [@hachjessed](https://forum.inductiveautomation.com/u/hachjessed)\ **Post date:** [February 28, 2020, 4:52pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/7 "2020-02-28T16:52:36Z")
Another Extension Function question: Can `system.gui.getParentWindow(event)` be used in an extension function? Such as: ```auto window = system.gui.getParentWindow(event) value = window.getRootContainer().customProperty ``` ---
**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\ **Post date:** [February 28, 2020, 5:10pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/8 "2020-02-28T17:10:49Z")
No, because there is no **event** object in extension functions. Use **self** instead. ```python window = system.gui.getParentWindow(self) value = window.getRootContainer().customProperty ``` ---
**Author:** ![roland.scheuer](https://avatars.discourse-cdn.com/v4/letter/r/c57346/32.png) [@roland.scheuer](https://forum.inductiveautomation.com/u/roland.scheuer)\ **Post date:** [March 19, 2020, 9:24am UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/9 "2020-03-19T09:24:14Z")
am i doing something wrong, **self** is not a EventObject. Is there otherway to get the rootcontainer without to write self.parent.parent… and so on 🙂 ---
**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:** [March 19, 2020, 12:14pm UTC](https://forum.inductiveautomation.com/t/ondoubleclick-extension-function/17961/10 "2020-03-19T12:14:03Z")
Java’s [SwingUtilities](https://docs.oracle.com/javase/8/docs/api/javax/swing/SwingUtilities.html#getAncestorOfClass-java.lang.Class-java.awt.Component-) can help. Place the following in a script module, `shared.swing`, perhaps: ```auto from javax.swing import SwingUtilities from com.inductiveautomation.factorypmi.application import FPMIWindow def getParentWindow(component): return SwingUtilities.getAncestorOfClass(FPMIWindow, component) ``` Then in your extension function, you can do: ```auto w = shared.swing.getParentWindow(self) v = w.rootContainer.customProperty ```