23

I use Qt4 Designer and I want that when I click on the "yes" button, some code will execute. And when I click on the "no", some other code will be execute. How can I do it?

joaquin
  • 82,968
  • 29
  • 138
  • 152
pol
  • 315
  • 2
  • 3
  • 7
  • Hummm! someone could give a hint on where in the Qt designer documentation is this specific question addressed ? Myself I could not find it. And it is not the signal/slot stuff – joaquin Nov 01 '11 at 10:35
  • 1
    @joaquin: It *is* signal and slot stuff, for all he has to do is to load the user interface, and connect slots to the buttons in question. These are really Qt basics. –  Nov 01 '11 at 10:39
  • 1
    @lunaryorn thanks. Sorry but how do you create the slot "my_custom_function" in order to bind it to the clicked() signal of the pushButton on the Signal/Slot editor. Maybe I miss something but I can not find the way in designer documentation, where I just found how to bind sender and receiver predefined signals and slots . Could you give a link and answer in this way the OP question? – joaquin Nov 01 '11 at 10:47

2 Answers2

48

  1. Click on the Edit Signal/Slots tool.

  2. Create a connection for your button. For this, select your button in the designer by pressing on it with the left button of the mouse. Move the mouse to some place in the main window to create a connection with the main window (it is like a red line with a earth (grounding) connection).

  3. When you release the mouse button, the Configure Connection dialog appears.

  4. In this dialog select a signal in the left text control (the sender), for example, pressed().

  5. Then press edit in the right text control (the receiver). A dialog for the Signals/Slots of MainWindow appears.

  6. In the slot panel add a new slot (green cross). The text slot1() appears. Double click on it to edit the line and write instead the name of your function doit_when_yes_ispressed(). Accept.

  7. Now in the Configure Connection dialog you will see your function in the right text control. Select and Accept.

  8. In the designer now you can see the signal and your function in the widget.

Marcin Orlowski
  • 72,056
  • 11
  • 123
  • 141
joaquin
  • 82,968
  • 29
  • 138
  • 152
  • 1
    thanks that exactly what i was looking for :) can you edit the function from the designer or you need to generate the code first? – pol Nov 01 '11 at 11:47
  • 1
    No you cannot edit the slot from the designer. In the designer you just define the name of a slot as signal will connect to. When uic is executed the autogenerated ui_filename.h includes a connection between the signal and the slot. Notice that there will be no compilation error even if the slot does not exist. So you have to add a slot (preferably private) in your .h file and implement it in the .cpp file Similarly for Python. – pnezis Nov 01 '11 at 12:27
  • @webclectic How to add what i need to do in pyqt? – user567879 Dec 26 '11 at 06:54
  • 7
    Hi, I am using QT designer 4.8.6 and in the `Configure Connection` window, the `Edit` option is greyed out (is disabled and can't be clicked). Anyone knows why this odd behaviour? – zhirzh Apr 28 '15 at 19:15
  • Is there an automatic way to add the slot (defined in designer) to the code (.h and .c) by mouse click? – Silicomancer Feb 01 '18 at 23:05
6
  • Right-click on your widget
  • Select "Go to slot..."
  • Select a signal and click OK

Your custom slot declaration and definition for that signal will be added to *.cpp and *.h files. Its name will be generated automatically.

upd: Sorry, I didn't notice that the question is about Python & QtDesigner itself, I was thinking of the designer mode in QtCreator IDE. However, this still may be useful for someone who is looking for Qt/C++ info, so I leave the answer.

volvpavl
  • 604
  • 8
  • 9