Pygame - How do I check if my rect has already been clicked?

Question

What I'm trying to do is if a rect has been clicked, it is selected and text will display, but if its clicked again, then it is de-seleced and the text goes away.

list_of_rect is a list of coordinates (x, y, width, height) representing the position and size of the rect.

render_display just shows the screen with text.

if event.type == pygame.MOUSEBUTTONUP and event.button == 1: x, y = event.pos for i in range(len(list_of_rect)): j = list_of_rect[i] if j[0][0] <= x <= (j[0][0] + j[0][2]) and j[0][1] <= y <= \ (j[0][1] + j[0][3]): render_display(screen, text)

EDIT: One idea I was thinking was to keep track of the rectangle that has been clicked on. But I'm not sure how to implement this

rassar · Accepted Answer · 2016-12-01 02:25:14Z

2

Try having a list, like this:

rects_clicked = []

Then, in your event code:

if j not in rects_clicked: #undisplay text rects_clicked.append(j) else: #display text rects_clicked.remove(j)

edited Dec 1, 2016 at 2:25

answered Dec 1, 2016 at 1:59

rassar

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7 Comments

data_pi Over a year ago

I used a variable called selected_rect instead, and used your idea. Works perfectly, thanks!

PMARINA Over a year ago

This would only work if @Theo is storing the rectangles in a list. He (sorry if wrong pronoun) has already stated that the only info being stored is list_of_rect, which contains coordinates, not rectangle objects

rassar Over a year ago

@PMARINA assuming that list_of_rect stores its data like [[x, y, width, height], [x2, y2, width2, height2],...[xn, yn, widthn, heightn]] the rects_clicked does not need to keep track of the rectangle objects but instead checks if the sublist is in rects_clicked. So rects_clicked might look like [[x, y, width, height], [x3, y3, width3, height3]] which is fine for the OP's requirements

rassar Over a year ago

@PMARINA essentially each group of coordinates can be treated as an object

rassar Over a year ago

@PMARINA that's true but Theo isn't using objects and it probably won't matter that much. I could add a basic class if you really want me to.

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PMARINA · Accepted Answer · 2016-12-01 02:11:16Z

I would use a 2d list containing Booleans. When the rectangle is clicked, I would say list[xCoordOfRectangle][yCoordOfRectangle] = !list[xCoordOfRectangle][yCoordOfRectangle]. Then, in the drawing method, I would say:

for i in list: for j in i: if(j): #information drawing function goes here else: #Solid/Empty Rectangle drawing function goes here

Note that you would need to initialize list to have false for every rectangle. Also note that if the rectangles are not arranged in a rectangular fashion, you would need to use numbers in the following way: 1 is assigned, true; 2 is assigned, false; 3 is unassigned (sort of like null). Either that, or you could just have a one-dimensional list to store the Booleans and then keep track of which element in the list is which element.

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