[Solved] Software Keyboard in QT

Sidii

Dear All,

I am developing an onscreen keyboard using QT. It looks similar to the hardware QWERTY keyboard.
I want to do following:

On press of CAPS button, all the buttons should display capital letters. and vice versa.

What is the best suitable approach to achieve this functionality.

Kindly give your suggestions.

Thanks
Sid

Pradeep P N

Create a different widgets with Capital letters & Small letters. Switch between these visual elements or get the existing text and convert it to Upper or *Lower *based on the condition.
In summery there is no direct easy way of doing it, its all a manual process.

p3c0

Hi,

If you're going QML way then binding would be enough :)

Ildar

In Qt or QML you can create flag isShift. Then in your button control you can change caption or image in depending on isShift flag.

For example:
QML
@
DigitalButton {
caption: isShift ? upperChar : lowerChar
...
}@

Qt:
@
slots:
void onShiftChanged() {
setCaption(isShift ? upperChar : lowerChar )
}
@

Sidii

Thanks a lot for the suggestions.

I finally achieved this using the below code:

@
for (int i = 0; i < m_contentsLayout->count();i++) {
if (QWidgetItem myItem = dynamic_cast <QWidgetItem>(m_contentsLayout->itemAt(i))) {

QPushButton *w = dynamic_cast <QPushButton*>(myItem->widget());
if(w != NULL)
{
        //qDebug()<<"Button Text:"<<w->text();
 QString str = w->text();
 if(m_bPressedCapsLock)
  w->setText(str.toUpper());
 else
  w->setText(str.toLower());
}
                    }}

@

Sidii

Thanks for the suggestions. I am making this completed.

Ildar

Nevertheless, I suggest you create custom widget KeyboardButton and use signals/slots instead your loop. This approach is more flexible and extendable.