how to compare a Qstring with a constant char*

[qt_user]

I have to compare the text of a buton with a const , say for example "Set Homograph"...qstrcmp is showing error:
if(qstrcmp(localCalibrateControlsObj->setHomographyButton->text(),"Set Homography")==0)
ERROR:cannot convert QString to const cha *....

[tbscope]

You can use QString(const char* str) to convert it to a QString

[borisbn]

while QString has implicit constructor you can compare them with == operator

if ( localCalibrateControlsObj->setHomographyButton->text() == "Set Homography" ) ...

and if you want to compare with qstrcmp you should get a const char pointer to QString data like this

if ( qstrcmp( localCalibrateControlsObj->setHomographyButton->text().toAscii().constData(),"Set Homography")==0) ...

[qt_user]

thanx............thanx a lot