Problem of using Qt

lokkahei

I cannot add push button or any other items except horizontal/vertical line into the ui form. How can i solve this problem???

Sam

So what is your requirement ?

lokkahei

i am using Qt4.7.4 and i cannot add even a pushbutton to a new interface of a new Qt GUI Application project
but i tried to use Qt4.8.1, everything is alright
so what is the problem about Qt4.7.4?

andre

Qt 4.7.4 has no problems like you're describing. We're using it for complex UI's successfully. Do you honestly think it would have been released if you could not use it to put a QPushButton on a form?

Something is wrong with either your code your system setup.

lokkahei

i try another computer and same problem occur
and the project is newly created

i download the QtSDK from http://qt.nokia.com/downloads and download Linux/X11 64-bit offline installer
i choose custom, and install all the things except 4.8.1 source and qt4.8.1(Desktop)

DerManu

Define "I cannot add push button"

lokkahei

Normally, click and drag the pushbutton to the interface, then the pushbutton will be on the interface.
But i cannot do this step. Qt dont allow me to do it.

DerManu

Do you get an error message? Does QtCreator output any error message or warning when you start it in the terminal? Does it happen with absolutely all widgets except the vertical/horizontal lines? Does your program run when you add widgets programmatically, i.e. in the main window constructor?

andre

In Qt Creator, open the design view on a form. Then click in the menu Tools -> Form Editor -> About Qt Designer Plugins... Do you see anything in the dialog you get? Are any plugins listed? Any errors reported?