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am2002  
#1 Posted : Monday, May 18, 2020 11:25:22 AM(UTC)
am2002

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Joined: 5/18/2020(UTC)
Posts: 2

I would like to realize the next application - Each time the button is pressed, the canvas\background is painted with various colors generated randomly. Please, help me. I not found nothing in Designer for it
MIP  
#2 Posted : Monday, May 18, 2020 1:22:09 PM(UTC)
MIP

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Austria
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Hi,

just one way how you can create a random color via xpath on a button press. is to create a random number from 0 to 0xffffff, then add leading 0 until you reach 6 digits, prefix the whole thing with #

Code:

'#'|| pad-string-left(
		integer-to-hex-string( xs:integer ( fn:random-number-generator(fn:current-dateTime())?number * hex-string-to-integer('ffffff') ) ),
  		6, '0' )
am2002  
#3 Posted : Monday, May 18, 2020 2:03:45 PM(UTC)
am2002

Rank: Newbie

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Joined: 5/18/2020(UTC)
Posts: 2

Hi,
Thanks for the hint how to get a random color through its recording in RGB, but I don’t understand how to set the background color by clicking. This is where help is needed :)
MIP  
#4 Posted : Monday, May 18, 2020 2:42:45 PM(UTC)
MIP

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Joined: 7/22/2019(UTC)
Posts: 11
Austria
Location: Vienna

Was thanked: 3 time(s) in 3 post(s)
just create an attribute, element, variable,... for your bk color.
Initialize with whatever color you want "#000000" for black for example.
Assign this element to the tables background color.
On button click:
update node -> your bk color element,...
with result of -> the random color code
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