Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. Interaction between dialog boxes and main window
Forum Updated to NodeBB v4.3 + New Features

Interaction between dialog boxes and main window

Scheduled Pinned Locked Moved General and Desktop
6 Posts 4 Posters 3.9k 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.
  • Z Offline
    Z Offline
    Zain
    wrote on last edited by
    #1

    Hello All,

    Please help me to get interaction(passing some values) between dialog-dialog and dialog-main window.
    It would be very helpful if you provide some code or links for similar examples.

    Any suggestion appreciated.
    Thanks in Advance

    Zain

    1 Reply Last reply
    0
    • A Offline
      A Offline
      AcerExtensa
      wrote on last edited by
      #2

      It is not really clear what you mean, some code will be helpful. In any way the answer will be: use signal/slot connection to communicate between objects... Here is video tutorial: "C++ Qt 04 - Signals and Slots":http://www.youtube.com/watch?v=JtyCM4BTbYo

      God is Real unless explicitly declared as Integer.

      1 Reply Last reply
      0
      • Z Offline
        Z Offline
        Zain
        wrote on last edited by
        #3

        Thanks for the reply,

        I am trying to make it more clear:

        • I am trying to create some dialogs, which will return some value to the another dialog (which exec() or show the first dialog )when we close these.

        I have tried to write the close event , but don't know how a dialog returns a value to its parent.

        I want to have a three level dialog calling system .(mainWindow -> dialog -> subDialog).
        And the values will be returned in a manner like.(subDialog -> dialog -> mainWindow).

        Please help me for this.

        Any suggestion appreciated.

        Thanks and Regards

        Zain

        1 Reply Last reply
        0
        • T Offline
          T Offline
          tilsitt
          wrote on last edited by
          #4

          Like AcerExtensa told you: use signals and slots.

          In your case, you could emit a signal from subDialog in closeEvent, which will be connected to dialog and then from dialog to mainWindow.

          Another way could be to use a defined value with QDialog::done().

          1 Reply Last reply
          0
          • V Offline
            V Offline
            vittalonline
            wrote on last edited by
            #5

            if you want passing arguments.. this example illustrates pass a int value as an argument in
            signal/slot mechanism.

            in header file

            Q_PROPERTY(int curState READ curState NOTIFY changeState)

            public:
            int curState();

            signals:
            void changeState(int);


            in CPP

            int ClassName::curState() // write a get method in cpp
            {
            return crstate;
            }

            Now you can use signal/slot mechanism whatever you want either
            interaction(passing some values) between dialog-dialog and dialog-main window
            or other.

            1 Reply Last reply
            0
            • V Offline
              V Offline
              vittalonline
              wrote on last edited by
              #6

              in the above code
              emit a signal "changeState" from Dialogbox in closeEvent, which will be pass value from dialog to dialog or from dialog to mainWindow.

              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