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. How to acces MainWindow objects from QGraphicsItem

How to acces MainWindow objects from QGraphicsItem

Scheduled Pinned Locked Moved General and Desktop
3 Posts 2 Posters 3.2k Views
  • 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.
  • A Offline
    A Offline
    apollo74
    wrote on last edited by
    #1

    Hello again,

    I have an application where my main window contains a toolbar with buttons on it, a left menu QFrame with QLabel objects, and a central area of type QGraphicsScene where I drag and drop QGraphicsItems. Each one of those QGraphicsItems has an object of type QDialog that shows up when double clicking on the Item... when the dialog appears it contains a QGLWidget that will plot a mathematical function of mine (and here is my problem...) only when the button "Run" located in the toolbar of the MainWindow is clicked.
    So my question is, how do I read the status of the button "Run" located in the toolbar of the main window from within the dialog of a QGraphicsItem?

    Thanks for your suggestions,

    Boris

    1 Reply Last reply
    0
    • G Offline
      G Offline
      giesbert
      wrote on last edited by
      #2

      You could use some global status cache, or signals and slots to set the state from run button via MainWindow to the objects.

      Please do yourself a favor and don't try to access the button from the dialogs.

      I would use:

      run button connect to a slot in MainWindow and state stored there.

      give dialog a pointer to the main window and call a getter method there.

      Or create a custom QApplication derived class and store the state there. The global QApplication object can be used from all obejcts.

      Nokia Certified Qt Specialist.
      Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

      1 Reply Last reply
      0
      • A Offline
        A Offline
        apollo74
        wrote on last edited by
        #3

        Hi Gerolf,

        thanks for the tips, I like number 1, seems easy to do and I thought about that before but still my problem was how to read the state of "run" button stored in MainWindow from inside a dialog class of a QGraphicsItem inside a QGraphicsScene. Can you give me some help there too? Thanks.

        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