XmlListModel & XmlRole with RSS

ny-hardcore

Hi, i'm trying to parse following xml feed with XmlListModel, delegate and Listview

@
<GetProgramGuideResponse>
<ProgramGuide>
<Channels>
<Channel name=Channel1>
<Program title=program1>
<Program title=program2>
<Program title=program3>
</Channel>
<Channel name=Channel2>
<Program title=program1>
<Program title=program2>
<Program title=program3>
</Channel>
@

But i'm having a hard time with the query,
i can get all the channels OR all the programm titles,

But what i really want is a per channel list of titles like so:
channel1, title
channel1, title
channel2, title
channel2, title

my xmllistmodel looks like this:

@
XmlListModel {

 id: xmlModel
 source: "http://192.168.1.65:6544/Myth/GetProgramGuide?StartTime=2011-02-07T20:00:00&EndTime=2011-02-07T23:00:00&Details=0&NumOfChannels=10"
 query: "/GetProgramGuideResponse/ProgramGuide/Channels"

 XmlRole { name: "channel"; query: "Channel/&#x40;channelName/string()" }
 XmlRole { name: "title"; query: "Channel/Program/&#x40;title/string()" }
 XmlRole { name: "category"; query: "Channel/Program/&#x40;category/string()" }
 XmlRole { name: "startTime"; query: "Channel/Program/&#x40;startTime/string()" }

@

this all returns undefined, the error on console is:
@
Error FORG0006 in Unknown location: Effective Boolean Value cannot be calculated for a sequence containing two or more atomic values.
@
googleing this doens't give me any clues...

I suspect this has to do with the fact that every channel can have more than one program, if i parse rss with one program per channel it works as expected...

Is this at all possible? If so, can someone point me into the right direction?

[EDIT: code formatting, please use @-tags, Volker]

rburdick

Another related question:

How do you parse values out of XML elements that are in tags with namespaces? For example, in the following:

@
<media:content xmlns:media="http://search.yahoo.com/mrss"
url="http://myserver.com/sample.jpg"
type="image/jpeg"
medium="image"
height="76"
width="76">
@

I have the following XmlListModel:

@
XmlListModel {
id: newsModel
source: mainWindow.currentFeed
query: "/rss/channel/item"
namespaceDeclarations: "declare namespace media='http://search.yahoo.com/mrss';"

    XmlRole { name: "title"; query: "title/string()" }
    XmlRole { name: "link"; query: "link/string()" }
    XmlRole { name: "description"; query: "description/string()" }
    XmlRole { name: "imageUrl"; query: "media:content/&#x40;url" }
}

@

Everything works except for the imageUrl query. If anyone has successfully parsed XML values out of namespace based XML, I'd love to see how it was done.

[EDIT: code formatting, Volker]

ny-hardcore

Update to orginal post about parsing xml feed (not the hijack about namespaces...)

I made my listmodel like this now:

@
id: xmlModel
source: "http://192.168.1.65:6544/Myth/GetProgramGuide?StartTime=2011-02-08T22:00:00&EndTime=2011-02-08T23:00:00&Details=0&NumOfChannels=100"
query: "/GetProgramGuideResponse/ProgramGuide///Program"

 XmlRole { name: "channel"; query: "Channel/&#x40;channelName/string()" }
 XmlRole { name: "title"; query: "&#x40;Title/string()" }
 XmlRole { name: "category"; query: "&#x40;Category/string()" }
 XmlRole { name: "startTime"; query: "&#x40;startTime/string()" }

@
AT=@ (tags mess code up?)

i get all 'programms' but not the @channelName from channel..

i tried the solution in this thread about parents..
http://developer.qt.nokia.com/forums/viewthread/3638/
but to no avail..
maybe because i want the attribute of the parent? i studied xpath tutorials but can't seem to find an answer to my question..

[EDIT: fixed @-Signs, Volker]

goetz

[quote author="ny-hardcore" date="1297203248"]
AT=@ (tags mess code up?)
[/quote]

You can use @ to insert an @-tag into a code section.

geronik

One solution could be to use two models for each tag, namely one model for channels and one for the programs. The model for the programs should use the name of the channel..

ny-hardcore

[quote author="geronik" date="1297238147"]One solution could be to use two models for each tag, namely one model for channels and one for the programs. The model for the programs should use the name of the channel..[/quote]

I thought about this solution, but how would i make the listview present the correct Parent > Childeren ?
The first model would collect al channels, the second all programs.
Should i make a 'nested' listview then? (is this possible?)

@
Listview with Parent
model of Parents
delegate of parents
Listview with Childeren
model of children
delegate of Children
@

Or do i have to do something in the delegate, and use one delegate for both?

excuse me if the above doesn't make sense, i'm very new to qml and programming in general..

geronik

You could use a delegate and a model for each type of tag :

ProgramGuide.qml

@
XmlListModel{
..

query: "/path/to/channels"

XmlRole{ name:"channelList" query:"@name/string()" }

}
@

ProgramGuideItem.qml

@ListView{
model:ProgramGuide{}

delegate: ChannelsDelegate{ }

}@

ChannelsByList.qml

@
XmlListModel{
..

query: "path/to/channels[@name = _channelListName]/channel"

XmlRole{ name:"channelName" query:"@name/string()" }

}@

ChannelsDelegate.qml

@
Item{
..
ListView{

  model: ChannelsByList{ _channelListName: name}

 delegate: ChannelDelegate{ }

}@

ChannelDelegate.qml

@
Item{
..

model: ProgramsByChannel{ _channeName: name }

delegate: ProgramDelegate{ }

}@

..

I hope I didn't create any mess..

ny-hardcore

Thank you for your reply!

i will try tonight and report back!

ny-hardcore

i'm sorry.. i tried but failed..

is it possible you mixed up some names?

I have following so far:

MythScheduleInfo.qml
@-

import QtQuick 1.0

XmlListModel {
id: scheduleInfo
source: "http://192.168.1.65:6544/Myth/GetProgramGuide?StartTime=2011-02-11T22:00:00&EndTime=2011-02-11T23:00:00&Details=0&NumOfChannels=10"
query: "/GetProgramGuideResponse/ProgramGuide/Channels/*/Program"

 XmlRole { name: "title"; query: "title/string()" }
 XmlRole { name: "category"; query: "category/string()" }
 XmlRole { name: "startTime"; query: "startTime/string()" }
 }

@-

MythChannelList.qml (isn't used atm but returns all channel names)
@-

import QtQuick 1.0

XmlListModel {
id: channelList
source: "http://192.168.1.65:6544/Myth/GetProgramGuide?StartTime=2011-02-11T22:00:00&EndTime=2011-02-11T23:00:00&Details=0&NumOfChannels=10"
query: "/GetProgramGuideResponse/ProgramGuide/Channels/Channel"

     XmlRole { name: "channelList"; query: "channelName/string()" }

      }

@-

ScheduleDelegate.qml
@-
import QtQuick 1.0

Component {
id: scheduleDelegate
Item {
width: 800; height: 100
Column {
Text {
font.pixelSize: 20
clip: true
wrapMode: Text.WordWrap
textFormat: Text.RichText
text: '<b>Title:</b> ' + title }

        Text {
            font.pixelSize: 16
            clip: true
            wrapMode: Text.WordWrap
            textFormat: Text.RichText
            text: '<b>Starttime:</b> ' + startTime }

            Text {
            font.pixelSize: 14
            clip: true
            wrapMode: Text.WordWrap
            textFormat: Text.RichText
            text: '<b>Description:</b> '  }

        Text {
            font.pixelSize: 14
            clip: true
            wrapMode: Text.WordWrap
            textFormat: Text.RichText
            text: '<b>Category:</b> ' + category }
        }
}

}
@-

ScheduleMenu.qml
@-

import Qt 4.7

Item {
anchors.fill: parent;

Text {
    id: text
    anchors {
        left: parent.left
        topMargin: 40
        top: parent.Top
    }
    text: "Schedule Information"
    font.pixelSize: 55
    color: "white"
    style: Text.Raised;  styleColor: "#1d1d1d";
}

ScheduleDelegate { id: scheduleDelegate }

Item {
    ListView {
        anchors {
            left: parent.horizontalCenter
            top: parent.top
            topMargin: 100
            leftMargin: 250 }
        width: 600
        height: 600
        model: mythScheduleInfo
        delegate: scheduleDelegate
        MouseArea {
            anchors.fill: parent
            onClicked: xmlModel.refresh(); }
                }
}

Column {
    anchors {
        verticalCenter: parent.verticalCenter
        top: text.bottom
        topMargin: 20
    }
    spacing: 20
    Button {
        width: 180; height: 93
        text: "Status"
        onClicked: main.state = "StatusState"
    }
    Button {
        width: 180; height: 93
        text: "Schedule"
        onClicked: Qt.quit();
    }
    Button {
        width: 180; height: 93
        text: "Quit"
        onClicked: Qt.quit();
    }
}

}

@-

blam

You can make a nested view by having a model + delegate for the channels, then in that delegate, have a model + delegate for the programs.

E.g.

@
ListView {
width: 300; height: 500
model: XmlListModel {
source: ...
query: "/GetProgramGuideResponse/ProgramGuide/Channels/Channel"
XmlRole { name: "channel"; query: "@name/string()" }
}

delegate: Row {
    Text { text: channel }

    ListView {
        width: 300; height: 100
        model: XmlListModel {
            source: ...
            query: "/GetProgramGuideResponse/ProgramGuide/Channels/Channel[&#x40;name='" + channel + "']"
            XmlRole { name: "programTitle"; query: "Program[1]/&#x40;title/string()" }
        }
        delegate: Text { text: programTitle }
    }
}

}
@