Qt-interest Archive, April 2008
equivalent of gtk Realize Event in QT ?
Message 1 in thread
I am looking for an equivalence of the Gtk Realize Event on widget in QT
e.g. an Event that occurs just once before the widget is shown
but does not occur everytime I hide then re-show the widget
(one option is to reimplement the show event and set a flag realized to true
the first time so as to execute the desired code only once)
void MyQWidget::showEvent(QShowEvent *event)
{
if (r_isRealized == false)
{
r_isRealized = true; // will execute this code only once
// more code here...
}
event->ignore()
}
but would anyone have a better option to suggest?
Message 2 in thread
Hi Yannick
perhaps QEvent::Polish could help you, although I'm not sure if it's
guaranteed to be sent just once.
Ross.
----- Original Message -----
From: Yannick Barbeaux
To: qt-interest@xxxxxxxxxxxxx
Sent: Thursday, April 10, 2008 12:05 AM
Subject: equivalent of gtk Realize Event in QT ?
I am looking for an equivalence of the Gtk Realize Event on widget in QT
e.g. an Event that occurs just once before the widget is shown
but does not occur everytime I hide then re-show the widget
(one option is to reimplement the show event and set a flag realized to true
the first time so as to execute the desired code only once)
void MyQWidget::showEvent(QShowEvent *event)
{
if (r_isRealized == false)
{
r_isRealized = true; // will execute this code only once
// more code here...
}
event->ignore()
}
but would anyone have a better option to suggest?
--
[ signature omitted ]
Message 3 in thread
I reimplemented the event handler so as to catch the polish event
for a QFileDialog but the event doesn't seem to occur never?? Would the
QFileDialog be a special case?
bool MyQFileDialog::event(QEvent *event)
{
if (event->type() == QEvent::Polish)
{
std::cout<<"Polish...\n";
return true;
}
event->accept(); // propagate event
return true; // ?
}
On Wed, Apr 9, 2008 at 4:53 PM, Ross Bencina <rossb-lists@xxxxxxxxxxxxxx>
wrote:
> Hi Yannick
>
> perhaps QEvent::Polish could help you, although I'm not sure if it's
> guaranteed to be sent just once.
>
> Ross.
>
> ----- Original Message ----- From: Yannick Barbeaux
> To: qt-interest@xxxxxxxxxxxxx
> Sent: Thursday, April 10, 2008 12:05 AM
> Subject: equivalent of gtk Realize Event in QT ?
>
>
>
> I am looking for an equivalence of the Gtk Realize Event on widget in QT
>
> e.g. an Event that occurs just once before the widget is shown
> but does not occur everytime I hide then re-show the widget
> (one option is to reimplement the show event and set a flag realized to
> true the first time so as to execute the desired code only once)
>
> void MyQWidget::showEvent(QShowEvent *event)
> {
> if (r_isRealized == false)
> {
> r_isRealized = true; // will execute this code only once
>
> // more code here...
> }
>
> event->ignore()
> }
>
>
> but would anyone have a better option to suggest?
>
Message 4 in thread
in qfiledialog detailed description we can read...
"The easiest way to create a QFileDialog is to use the static
functions. On Windows, these static functions will call the native
Windows file dialog"
maybe you call native window file dialog so this can be the reason of
no event::Polish in event handler?
to be confirmed.
Quoting Yannick Barbeaux <ybarbeaux@xxxxxxxxx>:
> I reimplemented the event handler so as to catch the polish event
> for a QFileDialog but the event doesn't seem to occur never?? Would the
> QFileDialog be a special case?
>
> bool MyQFileDialog::event(QEvent *event)
> {
> if (event->type() == QEvent::Polish)
> {
> std::cout<<"Polish...\n";
> return true;
> }
>
> event->accept(); // propagate event
>
> return true; // ?
> }
>
> On Wed, Apr 9, 2008 at 4:53 PM, Ross Bencina <rossb-lists@xxxxxxxxxxxxxx>
> wrote:
>
>> Hi Yannick
>>
>> perhaps QEvent::Polish could help you, although I'm not sure if it's
>> guaranteed to be sent just once.
>>
>> Ross.
>>
>> ----- Original Message ----- From: Yannick Barbeaux
>> To: qt-interest@xxxxxxxxxxxxx
>> Sent: Thursday, April 10, 2008 12:05 AM
>> Subject: equivalent of gtk Realize Event in QT ?
>>
>>
>>
>> I am looking for an equivalence of the Gtk Realize Event on widget in QT
>>
>> e.g. an Event that occurs just once before the widget is shown
>> but does not occur everytime I hide then re-show the widget
>> (one option is to reimplement the show event and set a flag realized to
>> true the first time so as to execute the desired code only once)
>>
>> void MyQWidget::showEvent(QShowEvent *event)
>> {
>> if (r_isRealized == false)
>> {
>> r_isRealized = true; // will execute this code only once
>>
>> // more code here...
>> }
>>
>> event->ignore()
>> }
>>
>>
>> but would anyone have a better option to suggest?
>>
>
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