QlineEdit with constant text and editable text fields

[arunpk]

Thanks for the reply.

The content text of this LineEdit will be used as file name after replacing placeholder <COUNTER> with values from 0..N.

This above mentioned is only one use case. The actual functionality of my LineEdit will contain multiple placeholder fields like <DATE>, <TIME>, etc... which can be added to the LineEdit on the current cursor position.

So its not an option to use multiple LineEdits.

[prasad_N]

May you could explain your requirement, Insted of single usecase.

[ars]

Hello,

if youre use cases allow for a maximum length of the editable sections of the line edit content, you could try using line edit input mask. See http://doc.qt.io/qt-5.4/qlineedit.html#inputMask-prop

Best regards
ars

[arunpk]

Usecase1: mode = Cyclic
In this case by default there will be only <COUNTER> in LineEdit[automatically added] and this should be always at the end of the LineEdit and which should not be edited. But the user can insert new characters before <COUNTER>[All entries in the pop up list cannot be used by the user[shows warning on selection]

Usecase2: mode = Limited
In this use case user can add any place holder[<CONTER>, <DATE>, <TIME>, etc...] from the pop up list and all this can be editable[no restrictions] and user can insert new characters anywhere in the LineEdit.
LineEdit_Sample2.png

[arunpk]

Thnaks for the inputs.
Now I have found a way to make my <COUNTER> non editable using the mask

lineEdit->setInputMask("xxxx\<\C\O\U\N\T\E\R\>");

lineEdit->setInputMask("xxxx\<\C\O\U\N\T\E\R\>");

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Now thw problem is I am able to enter only 4 characters before <COUNTER> but i want to allow the user to enter maximum of 91 charcters.

What should I modify on the reg expression to achieve this?