Help required with Qt GraphicsViewTextItem

[abhishekm71]

Hi!

I am really stuck up with a task relating to Qt GraphicsView. Any help or suggestions will be highly appreciated.

In my QGraphicsView application, I have a few editable QGraphicsTextItems that I have added to the scene. I need the following functionality:

- Setting validator for float so that the user does not by mistake enter a character or new line in that text item.

- Emitting a signal once the text is changed by the user.

Can anyone please suggest how I can implement this in my application? I have tried real hard but I am not able to find anything suitable. If there is any alternative or workaround, I'll be grateful to know.

Thanks!

[coder777]

Take a look at the documantion of QGraphicsTextItem:
http://qt-project.org/doc/qt-5.0/qtwidgets/qgraphicstextitem.html

what you need is the document():
http://qt-project.org/doc/qt-5.0/qtgui/qtextdocument.html


the QTextDocument emits a signal when it is changed (and more):
http://qt-project.org/doc/qt-5.0/qtgui/qtextdocument.html#signals

Read this to understand how to connect to a signal:
http://qt-project.org/doc/qt-5.0/qtcore/signalsandslots.html

- Setting validator for float so that the user does not by mistake enter a character or new line in that text item.

It doesn't look like that there is a validator. I wouldn't use one. Just let the user type whatever he wants to and tell him later when the data is somehow used what he did wrong if

[abhishekm71]

Thank You coder777... really appreciate your help.

I didn't know about this QTextDocument element that you have suggested. Will check out the links you provided.