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Thread: QML extension - painting issue

  1. #1
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    Default QML extension - painting issue

    Hi again,

    I am looking for a simple way to draw several rectangles (the amount depends on user). This could be quite simple, but I would like to have all these rectangles placed on the circle with specific radius. Apart from that each rectangle will contain text, and may contain icon image.

    My main concern, as I've never done things like this, is to how
    - draw the rectangle with text and icon inside of it
    - how to put all these rectangles on the circle.

    I think I should at first draw transparent circle which would be parent for all rectangles, therefore rectangles should be parents for text and icon inside of them, am I right ?
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    Default Re: QML extension - painting issue

    Quote Originally Posted by kornicameister View Post
    - draw the rectangle with text and icon inside of it
    Create a Rectangle Element with two children -- one for the icon and one for the text and anchor them to the parent.

    - how to put all these rectangles on the circle.
    That's quite simple. Write javascript code that will calculate x and y positions for different angles of the circle. Then instantiate your rectangles dynamically and place them in the calculated coordinates.The math involves calculating position of a point on a sloped line with distance equal to the radius of the circle (there is a right triangle there so it boils down to using sine or cosine).
    Last edited by wysota; 3rd October 2011 at 10:20.
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  3. The following user says thank you to wysota for this useful post:

    kornicameister (5th October 2011)

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    Default Re: QML extension - painting issue

    I wanted to make it in C++ code, but it seems that making it in QML code would be more flexible because these rectangles could be placed on any shape I would like to place them. Nevertheless the approach will be the same, even I want to implement such feature in C++.
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    Default Re: QML extension - painting issue

    You can do the same thing in C++. I had the impression you wanted to do that in QML
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    Default Re: QML extension - painting issue

    Now, after you've mentioned that, I am pretty confused where I would like to put it...

    but I think that would be simpler do draw single Rectangle and than already in QML code attach to any shape I want to.
    Basically I have a class which uses QDeclarativeListProperty and I am constantly thinking whether I should put all drawing inside this class which uses QDeclarativeListProperty or rather to the type T which is placed in QDeclarativeListProperty.
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    Default Re: QML extension - painting issue, qmldump issue

    please remove this post
    I decided to moved it's content to new thread
    Last edited by kornicameister; 5th October 2011 at 11:24.
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