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Thread: Animating QGraphicsPixmapItem

  1. #1
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    Post Animating QGraphicsPixmapItem

    I have 2 QImages(img1, img2) loaded in 2 QGraphicsPixmapItem(imgItem1, imgItem2)

    Both are loaded in Graphics view
    I'm overlaying the images

    I want to create a small animation of QGraphicsPixmapItem within the graphicsview, when a button is clicked
    such that it imgItem2 starts at rotation = 0 & rotates until a predefined rotation angle within 5seconds
    then translates it by a predefined rowOffset and ColumnOffset within 5seconds

    I can rotate & translate easily
    but how do i create an animation of it with QTimer? QAnimation only works on objects like buttons/... not images?

    looked at certain example sourc code, but i'm not winning

    Please assist me
    A basic example would be highly appreciated

  2. #2
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    Default Re: Animating QGraphicsPixmapItem

    You can use QPropertyAnimation together with QSequentialAnimationGroup. Since the former can only animate properties, you need a subclass of QGraphicsItem that is derived from QObject. You can obtain that either by subclassing both QObject and QGraphicsPixmapItem, by subclassing QGraphicsObject and teaching it to show a pixmap or by wrapping a QGraphicsPixmapItem into QGraphicsObject.
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  3. The following user says thank you to wysota for this useful post:

    2lights (27th August 2013)

  4. #3
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    Default Re: Animating QGraphicsPixmapItem

    Thanks, though I want to create a small animation

    is there no easier faster process
    because its not a requirement of program
    I just want to add a cool animated touch

    Any ideas?

  5. #4
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    Default Re: Animating QGraphicsPixmapItem

    Quote Originally Posted by 2lights View Post
    Thanks, though I want to create a small animation
    How does a "small animation" differ from an "animation"?


    is there no easier faster process
    because its not a requirement of program
    I just want to add a cool animated touch
    It's about 6 lines of code, if you're looking for something simpler, you need to define what "simplicity" means for you.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


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