Create a Event2Signal class as follows.
#include <QMap>
#include <QList>
#include <QEvent>
#include <QObject>
class Event2Signal : public QObject
{
Q_OBJECT
public:
Event2Signal(QObject *parent=0) : QObject(parent) { }
~Event2Signal() { }
void filterEvent(QObject *o, QEvent::Type type) {
if(!o) return;
if( m_objectEventsMap.contains(o) ) {
QList<QEvent::Type> &events = m_objectEventsMap[o];
if(events.contains(type))
return;
events.append(type);
} else {
m_objectEventsMap[o].append(type);
o->installEventFilter(this);
}
}
signals:
void filteredEvent(QObject *o, QEvent *e, bool *filtered);
protected:
bool eventFilter(QObject *obj, QEvent *e) {
bool filtered = false;
emit filteredEvent(obj, e, &filtered);
return filtered;
}
private:
QMap<QObject *, QList<QEvent::Type> > m_objectEventsMap;
};
Now, lets say you want to take some action when user mouse-presses on a
lineEdit. You can do this
Event2Signal *e2s = new Event2Signal(lineEdit);
e2s->filterEvent(lineEdit, QEvent::MouseButtonPress);
connect(e2s, &Event2Signal::filteredEvent, [=]() {
// Activate your form and do other things here..
});
You can reuse this method for handling other kinds of events in signal-slot
style.
Hope this helps.
/ Prashanth
On Mon, 1 Feb 2016 at 21:41 Edward Sutton <edward.sut...@subsite.com> wrote:
> I want to display a form with a numeric touch key pad plus a decimal point
> when user clicks on a QLIneEdit field.
>
> I did not see any signal such as editingStarted.
>
> What are approaches to implementing a custom data entry?
>
> I am targeting Android and iOS with a QWidget app.
>
> -Ed
>
>
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