TableView header hides first elements

[sandro4912]

I have the following. Issue. I implemented a TableView with Header.

Since Headers are not directly supported I implemented it with the model I use from C++. Overall everything works except one Issue.

On startup of the program the table looks like this:

However when I try to scroll up I realize the first two rows were under the Header:

Now table view implementation with header looks like this:

import QtQuick 2.15
import QtQuick.Controls 2.15
import com.sysmon 1.0

Item {
    id: root

    TableView {
        id: tableView

        columnWidthProvider: function (column) {
            if(column === 5){
                return tableView.width
            }
            return 100;
        }

        anchors.fill: parent
        boundsBehavior: Flickable.StopAtBounds

        topMargin: columnsHeader.implicitHeight

        model: ProcessTableModel {
            id: processTableModel
        }

        ScrollBar.vertical: ScrollBar {
            policy: ScrollBar.AlwaysOn
        }
        clip: true

        delegate: Rectangle {
            implicitWidth: 80
            implicitHeight: 20
            Text {
                text: display
            }
        }

        Row {
            id: columnsHeader
            y: tableView.contentY
            z: 2
            Repeater {
                model: tableView.columns
                Label {
                    width: tableView.columnWidthProvider(modelData)
                    height: 35
                    text: processTableModel.headerData(modelData, Qt.Horizontal)
                    color: "green"
                    verticalAlignment: Text.AlignVCenter

                    background: Rectangle { color: "#FFFFFF" }
                }
            }
        }

        ScrollIndicator.horizontal: ScrollIndicator { }
    }
}

Let me know if you need to see the C++ code aswell.
The full program can be found in my repo here:

https://github.com/SandroWissmann/System-Monitor

edit: Please let me know if you need more information.

Or is there a better approach to get header in a qml TreeView?

[sandro4912]

I adjusted the size in the repeater to the same sizes as rectangle:

    delegate: Rectangle {
        implicitWidth: 80
        implicitHeight: 20
        Text {
            text: display
        }
    }

    Row {
        id: columnsHeader
        y: tableView.contentY
        z: 2
        Repeater {
            model: tableView.columns
            Label {
                width: tableView.columnWidthProvider(modelData)
                height: 20     // Changed here same as in Rectangle implicitHeigth
                text: processTableModel.headerData(modelData, Qt.Horizontal)
                color: "green"
                verticalAlignment: Text.AlignVCenter

                background: Rectangle { color: "#FFFFFF" }
            }
        }
    }

No still the first element is hidden under the header.

It simply looks like on start im not scrolled to the beginning of the table.

Can I scroll to the start in the program to fix this?