Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. Game Development
  4. [solved] deal cards and add to the scene
Forum Updated to NodeBB v4.3 + New Features

[solved] deal cards and add to the scene

Scheduled Pinned Locked Moved Game Development
29 Posts 2 Posters 10.4k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • M Offline
    M Offline
    Marcius
    wrote on last edited by
    #3

    Thank you for your input, SGaist. I'll give it a try and see how far I get with this. Will be back with an update. Meanwhile, if anyone else has any other ideas, that would be greatly appreciated!

    Marcius

    1 Reply Last reply
    0
    • M Offline
      M Offline
      Marcius
      wrote on last edited by
      #4

      Hey,

      After some time playing around, I ended up with this.

      My Card class inherits QGraphicsPixmapItem. When deck is created and all the cards get their suits and values, they also get a corresponding picture using setPixmap function. Then I call shuffle and deal functions, the later looks something like this (a loop here to put the cards onto the scene) :

      @
      QGraphicsPixmapItem *item = new QGraphicsPixmapItem();

      item->setPixmap(QPixmap(card[i].pixmap()));
      scene.addItem(item);
      @

      I'm happy with the result so far, but it's not tested fully yet, so don't know if it's going to do exactly what I want.

      Please let me know your thoughts.

      Thanks!

      EDIT:

      Although now I think after the cards are put on the screen, they become simply pictures and are not associated with Card class anymore because of this
      @ item->setPixmap(QPixmap(card[i].pixmap())); @

      Any thoughts on this?

      1 Reply Last reply
      0
      • M Offline
        M Offline
        Marcius
        wrote on last edited by
        #5

        Sorry to bombard this thread with questions, but how could I use
        @ scene.addItem(item); @ item being my Card object? Since all of them already are QGraphicsPixmapItems and have Qpixmaps assigned. I think that would help me a lot.

        1 Reply Last reply
        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #6

          You could make a subclass of QGraphicsPixmapItem and make it your card e.g. add getters for suit/rank to that subclass

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          1 Reply Last reply
          0
          • M Offline
            M Offline
            Marcius
            wrote on last edited by
            #7

            Pardon my ignorance (I'm still very new to C++), but when you say 'make a subclass of QGraphicsPixmapItem' is it
            @ class Card : public QGraphicsPixmapItem @
            or the other way around? And what is a difference? I tried the first one and it didn't work the way I wanted to, or I did something wrong. By the way, my original Card class has its setter and getter methods.

            Thanks a lot for your help!

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #8

              Yes, it's that.

              What didn't work the way you wanted ?

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

              1 Reply Last reply
              0
              • M Offline
                M Offline
                Marcius
                wrote on last edited by
                #9

                Oh, sorry, I simply forgot to pass my Card object as a reference to addItem, it seems to be working now.

                Ok, so I've got a couple of cards on the screen now and a mouse press event, that looks like this:
                @
                void Card::mousePressEvent(QGraphicsSceneMouseEvent *Card)
                {
                qDebug() << "I clicked a card ";
                }
                @

                This is only for testing at the moment. Now, when I click on a Card, I'd like qDebug() to output its suit and value. As I mentioned before, I do have getter methods for that, but not too sure where to go from here.

                Again, much appreciated, SGaist!

                1 Reply Last reply
                0
                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #10

                  It should rather be:

                  @
                  void Card::mousePressEvent(QGraphicsSceneMouseEvent *event) <- here
                  {
                  qDebug() << "I clicked a card ";
                  }@

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                  1 Reply Last reply
                  0
                  • M Offline
                    M Offline
                    Marcius
                    wrote on last edited by
                    #11

                    There's still heaps of work left to be done, but you, sir, got me helluva closer :)

                    Thank you!

                    1 Reply Last reply
                    0
                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #12

                      You're welcome !

                      Don't hesitate to take some times to look at Qt's documentation examples. They might contain a lot of stuff you can reuse/get inspiration from for your application

                      Happy coding !

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                      1 Reply Last reply
                      0
                      • M Offline
                        M Offline
                        Marcius
                        wrote on last edited by
                        #13

                        Hi,

                        Not too happy about coming back to the same thread, but I'm facing an issue.

                        @
                        class Card : public QGraphicsPixmapItem
                        @

                        This line generates a C2248 error, saying I cannot access private member in a QGraphicsPixmapItem class.

                        I have only a slight idea as to why this happens, but unfortunately no clue what to do about it. Funny thing is, it compiled no problem before, although I haven't made any changes to the Card class or any other relevant part of the code..

                        1 Reply Last reply
                        0
                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #14

                          What's the exact error you are getting ?

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                          1 Reply Last reply
                          0
                          • M Offline
                            M Offline
                            Marcius
                            wrote on last edited by
                            #15

                            error C2248: 'QGraphicsPixmapItem::QGraphicsPixmapItem' : cannot access private member declared in class 'QGraphicsPixmapItem'

                            error C2248: 'QGraphicsPixmapItem::operator =' : cannot access private member declared in class 'QGraphicsPixmapItem'

                            And that's compiler's output:

                            1> c:\qt\5.2.1\msvc2012\include\qtwidgets\qgraphicsitem.h(866) : see declaration of 'QGraphicsPixmapItem::QGraphicsPixmapItem'
                            1> c:\qt\5.2.1\msvc2012\include\qtwidgets\qgraphicsitem.h(822) : see declaration of 'QGraphicsPixmapItem'
                            1> This diagnostic occurred in the compiler generated function 'Card::Card(const Card &)'

                            and

                            'Card &Card::operator =(const Card &)'

                            1 Reply Last reply
                            0
                            • M Offline
                              M Offline
                              Marcius
                              wrote on last edited by
                              #16

                              I can't believe I did it (given my almost non-existent experience), but I finally got rid of the errors by providing my own class copy and assignment operator constructors. Please keep tuned though, will see where it leads me to.. :)

                              1 Reply Last reply
                              0
                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #17

                                What you are doing is risky, you've got the error because the base class (QGraphicsPixmapItem ) explicitly forbids the copy.

                                If you look at QGraphicsScene you see that you addItem takes a pointer to an item

                                Interested in AI ? www.idiap.ch
                                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                1 Reply Last reply
                                0
                                • M Offline
                                  M Offline
                                  Marcius
                                  wrote on last edited by
                                  #18

                                  I see what you're saying. I actually may be having problems because of that at the moment (not sure yet though). How would you go about this issue then? Quite frankly, I still don't know which which part of my program causes the error.

                                  1 Reply Last reply
                                  0
                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #19

                                    Just allocate your Cards on the heap and not on the stack

                                    Interested in AI ? www.idiap.ch
                                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                    1 Reply Last reply
                                    0
                                    • M Offline
                                      M Offline
                                      Marcius
                                      wrote on last edited by
                                      #20

                                      I tried that, although I still can't remove copy and assignment operator constructors without getting the same error..

                                      1 Reply Last reply
                                      0
                                      • SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #21

                                        Because somewhere in your code you are doing a copy. Are you using a QList<Card> or something similar ?

                                        Interested in AI ? www.idiap.ch
                                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                        1 Reply Last reply
                                        0
                                        • M Offline
                                          M Offline
                                          Marcius
                                          wrote on last edited by
                                          #22

                                          I saw your reply in my other post and I indeed did do copies by using vector. I'm changing my code around now.

                                          Check this line @ vector<Card*> * player = new vector<Card*>; @ Is it correct? And if so, how do I iterate through player? I'm getting a little confused with all these pointers.

                                          1 Reply Last reply
                                          0

                                          • Login

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Categories
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups
                                          • Search
                                          • Get Qt Extensions
                                          • Unsolved