[SailfishDevel] pageStack.pop() - send paramater to prev page
Christopher Lamb
christopher.lamb at thurweb.ch
Thu Jun 5 14:40:36 UTC 2014
Hi Markus
In my app I chose to instantiate all my Pages in the same place. Each of
the pages has a declaration in a separate qml file (e.g. MainPage.qml,
AreaSelectionPage.qml).
With this architecture none of the declarations need to know about the
previous or next page. It is not their concern. Instead they emit
signals NextPage, BackPageWithInfo, and Cancelled. In the signal handler
in the page instantation I do the actual pushing and popping, and
because all pages are instantiated in the same scope, they are all
available to be pushed / popped to. (see code example below).
The downside is that all the pages are created on startup (regardless of
if they are ever visited). For lightweight pages this is not a problem,
but for some pages this might be a problem. For these I dynamically
create the page content when the page is visible.
Grüsse
Chris
ApplicationWindow {
id: appWindow
.......
initialPage: mainPage
MainPage {
id: mainPage
....
onNextPage: {
if (pageType =="SMS") {
console.log("smsType is: " + smsType)
if (smsType =="Default") pageStack.push(smsPage, {lati: mainPage.getLati(), longi: mainPage.getLongi(), alti: mainPage.getAlti(), area_id: area_id, template_id: template_id, msg_status: msg_status, lastPage: "mainPage"})
}
else {
pageStack.push(areaSelectionPage)
}
}
}
AreaSelectionPage {
id: areaSelectionPage
....
onBackPageWithInfo: {
mainPage.areaSet = true;
mainPage.area_id = area_id;
pageStack.pop(mainPage);
}
onCancelled: pageStack.pop(mainPage);
}
SMSPage {
id: smsPage
....
onNextPage: {
pageStack.push(contactSelectionPage, {area_id: area_id, template_id: template_id})
}
}
ContactSelectionPage {
id: contactSelectionPage
....
onBackPageWithInfo: {
console.log("About to pop smsPage; contactName: " + contactName + ", contactPhone: " + contactPhone);
smsPage.contactName = contactName;
smsPage.contactPhone = contactPhone;
smsPage.lastPage = "contactSelectionPage";
pageStack.pop(smsPage);
}
onCancelled: pageStack.pop(smsPage);
}
}
On 05.06.14 14:43, info at flyingfischer.ch wrote:
> Thanks for your inputs!
>
> Calling
>
> PreviousPage.topic = "MyTopic";
> pageStack.pop();
>
> gives me a ReferenceError: PreviousPage is not defined.
>
> PreviousPage.qml and property string topic do exist.
>
> Thanks for your patience!
>
> Markus
>
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