Hi! I am new to Psychopy. I am creating an updating task in which participants have to click with the mouse on polygons. I want them to change color when pressed. How can I do it by using the Builder view? Thank you so much:) [image]

Hi There, I think the initial reason this wouldn’t work is because the first ‘if’ statement would need a double == to test for equality (rather than assign a variable). (i.e. if thisPolygon.color == white: ) However, this is a little tricker because the ‘isPressedIn’ method will check for mouse pr…

Hi There, You want to use a code component. In the begin routine tab list your polygons: polygons = [polygon, polygon_1] then on every frame check if the mouse is pressed in the polygon: for thisPolygon in polygons: if mouse.isPressedIn(thisPolygon): thisPolygon.color = 'red' Here …

Thank you so much, it works! And if I want to let participants press againg on the polygon to make it return to the previous color? Is it possible?

Sure, you just need to add another “if” statement (beware on indentation!), for example: for thisPolygon in polygons: if mouse.isPressedIn(thisPolygon): if thisPolygon.color == 'red': thisPolygon.color = 'blue' else: thisPolygon.color = 'red'

It works perfectly! Thank you so much:)

Hi Becca! This Code works perfectly in Psychopy but not in Pavlovia. Polygons don’t change color on click and they don’t return to the previous color if I double click them. Moreover, it is written that I have to define thisClickTime. Any advise?

Hi Rachele, For this ‘thisClickTime’ error you will just need to add that to the begin tab to initialize the variable on the JS side, e.g.: thisClickTime=0 There are a few extra tweaks needed to get this online. So here is the demo I sent functioning online https://pavlovia.org/lpxrh6/change-colo…

Hi Becca, I think this is a silly question but somehow I can’t figure out how to exhange the color red with blue in this code: if ((thisPolygon.fillColor[’_rgb’][2] === 0)) { thisPolygon.fillColor = new util.Color(‘white’); } else { thisPolygon.fillColor = new util.Color(‘red’); } So I would …

How to make polygons change color when pressed

Builder

Rachele January 4, 2021, 10:55am 10

I don’t know why it doesn’t work. I put the same codes as in the demo…

How to get the color of a polygon

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How to make polygons change color when pressed

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