lineEdit.clear() & lineEdit.setText('') Query

[monamour]

Dear All,

  I have  small question gentlemen, if I need to clear the fields in "lineEdit" I have used two methods, either by using "lineEdit.clear()"  or "lineEdit.setText('')", both of them does clear the fields. The question is what is the difference between them?

Many thanks,

[SGaist]

Hi,

Using clear in your code base makes the intent more understandable.

And you can use it with signal and slots directly.

[monamour]

@SGaist Thank you.

[Chris Kawa]

To add to what @SGaist said keep in mind that lineEdit.setText("") will construct a temporary QString and this means allocating memory, copying the data from the string literal (the single null terminator in this case), and copying that string into the line edit. A lot of very unnecessary work for clearing.

[monamour]

@Chris-Kawa Many thanks, so to use the clear() function it would be better than setText().