[Qt-qml] Listview contentheight woes

[amit shah]

Hi,
 I'am in a process of building a multi-line text viewer with scroll bars.
I have implemented  my component MultiLineText in a separate file .

The MultiLine component has a ListView and I'm using contentHeight property
of ListView drive the logic for  scrolling. I have not attached the
scrolling component code.

The problem is the contentHeight value is displaying as 200 which is the
height of the listview.

Here is the code, the driver code is implemented in focusKey.qml .

Any ideas as why contentHeight is not being calculated correctly.


thanks
--amit

File:focusKey.qml
=================
FocusScope {
    width: 1280
    height: 480
    focus: true
 Rectangle{
       color: "#d32828"

       border.color: "black"
       anchors.fill: parent;
       smooth:true
     MultiLineText{

            id:test
    width: 300;height: 200;

 anchors{top:parent.top;topMargin:100;left:parent.left;leftMargin:500}
            opacity: 0.5

            mlt_dataText:"
            1Contrary to popular belief, Lorem Ipsum is not simply random
text. It has roots in a piece of classical Latin literature from 45 BC,
making it over 2000 years old. Richard McClintock, a Latin professor at
Hampden-Sydney College in Virginia, looked up one of the more obscure Latin
words, consectetur, from a Lorem Ipsum passage, and going through the cites
of the word in classical literature, discovered the undoubtable source.
Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of de Finibus Bonorum et
Malorum (The Extremes of Good and Evil) by Cicero, written in 45 BC. This
book is a treatise on the theory of ethics, very popular during the
Renaissance. The first line of Lorem Ipsum, Lorem ipsum dolor sit amet..,
comes from a line in section 1.10.32
                        2Contrary to popular belief, Lorem Ipsum is not
simply random text. It has roots in a piece of classical Latin literature
from 45 BC, making it over 2000 years old. Richard McClintock, a Latin
professor at Hampden-Sydney College in Virginia, looked up one of the more
obscure Latin words, consectetur, from a Lorem Ipsum passage, and going
through the cites of the word in classical literature, discovered the
undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of
de Finibus Bonorum et Malorum (The Extremes of Good and Evil) by Cicero,
written in 45 BC. This book is a treatise on the theory of ethics, very
popular during the Renaissance. The first line of Lorem Ipsum, Lorem ipsum
dolor sit amet.., comes from a line in section 1.10.32
                        3Contrary to popular belief, Lorem Ipsum is not
simply random text. It has roots in a piece of classical Latin literature
from 45 BC, making it over 2000 years old. Richard McClintock, a Latin
professor at Hampden-Sydney College in Virginia, looked up one of the more
obscure Latin words, consectetur, from a Lorem Ipsum passage, and going
through the cites of the word in classical literature, discovered the
undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of
de Finibus Bonorum et Malorum (The Extremes of Good and Evil) by Cicero,
written in 45 BC. This book is a treatise on the theory of ethics, very
popular during the Renaissance. The first line of Lorem Ipsum, Lorem ipsum
dolor sit amet.., comes from a line in section 1.10.32
                        4ontrary to popular belief, Lorem Ipsum is not
simply random text. It has roots in a piece of classical Latin literature
from 45 BC, making it over 2000 years old. Richard McClintock, a Latin
professor at Hampden-Sydney College in Virginia, looked up one of the more
obscure Latin words, consectetur, from a Lorem Ipsum passage, and going
through the cites of the word in classical literature, discovered the
undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of
de Finibus Bonorum et Malorum (The Extremes of Good and Evil) by Cicero,
written in 45 BC. This book is a treatise on the theory of ethics, very
popular during the Renaissance. The first line of Lorem Ipsum, Lorem ipsum
dolor sit amet.., comes from a line in section 1.10.32
                        5Contrary to popular belief, Lorem Ipsum is not
simply random text. It has roots in a piece of classical Latin literature
from 45 BC, making it over 2000 years old. Richard McClintock, a Latin
professor at Hampden-Sydney College in Virginia, looked up one of the more
obscure Latin words, consectetur, from a Lorem Ipsum passage, and going
through the cites of the word in classical literature, discovered the
undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of
de Finibus Bonorum et Malorum (The Extremes of Good and Evil) by Cicero,
written in 45 BC. This book is a treatise on the theory of ethics, very
popular during the Renaissance. The first line of Lorem Ipsum, Lorem ipsum
dolor sit amet.., comes from a line in section 1.10.32
                        "

        }
 }


}



File: MultiLineText.qml
=====================
import Qt 4.7


Item {

    id:scrollMultiLine
    property string mlt_fontfamily;
    property int mlt_fontSize:18;
   // property alias mlt_dataText: scrollText.text
     property string mlt_dataText;
 //   property alias mlt_color:scrollText.color

    Component.onCompleted:{
        console.log("Target Height="+target_B.height+"
 ContentHeight"+target_B.contentHeight)
    }

    Component{
        id:scrollTextDelegate
        Text{
            id:scrollText

            anchors.fill: parent;
            wrapMode:Text.WordWrap;
            font.family: mlt_fontfamily;
            font.pixelSize:0
            text: mlt_dataText;
        }
    }

    ListView{
        id:target_B;
        model: 1; clip: true
        x:0;y:0;
        width: parent.width;height: parent.height;
        delegate:scrollTextDelegate
     }

//    ScrollBar{
//        target: target_B
//    }

}
=====================
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