19     ui->btna->setProperty("btnLetter", true);  in QKeyBoard()
20     ui->btnb->setProperty("btnLetter", true);  in QKeyBoard()
21     ui->btnc->setProperty("btnLetter", true);  in QKeyBoard()
22     ui->btnd->setProperty("btnLetter", true);  in QKeyBoard()
23     ui->btne->setProperty("btnLetter", true);  in QKeyBoard()
24     ui->btnf->setProperty("btnLetter", true);  in QKeyBoard()
25     ui->btng->setProperty("btnLetter", true);  in QKeyBoard()
26     ui->btnh->setProperty("btnLetter", true);  in QKeyBoard()
27     ui->btni->setProperty("btnLetter", true);  in QKeyBoard()
28     ui->btnj->setProperty("btnLetter", true);  in QKeyBoard()
29     ui->btnk->setProperty("btnLetter", true);  in QKeyBoard()
30     ui->btnl->setProperty("btnLetter", true);  in QKeyBoard()
31     ui->btnm->setProperty("btnLetter", true);  in QKeyBoard()
32     ui->btnn->setProperty("btnLetter", true);  in QKeyBoard()
33     ui->btno->setProperty("btnLetter", true);  in QKeyBoard()
34     ui->btnp->setProperty("btnLetter", true);  in QKeyBoard()
35     ui->btnq->setProperty("btnLetter", true);  in QKeyBoard()
36     ui->btnr->setProperty("btnLetter", true);  in QKeyBoard()
37     ui->btns->setProperty("btnLetter", true);  in QKeyBoard()
38     ui->btnt->setProperty("btnLetter", true);  in QKeyBoard()
39     ui->btnu->setProperty("btnLetter", true);  in QKeyBoard()
40     ui->btnv->setProperty("btnLetter", true);  in QKeyBoard()
41     ui->btnw->setProperty("btnLetter", true);  in QKeyBoard()
42     ui->btnx->setProperty("btnLetter", true);  in QKeyBoard()
43     ui->btny->setProperty("btnLetter", true);  in QKeyBoard()
44     ui->btnz->setProperty("btnLetter", true);  in QKeyBoard()