Qt Quick Controls 1 Style

maxwell31

I would like to to change the itembranchindicator for a QtQuick.Controls TreeView (the little triangle before an item in a TreeView). When looking int qml/QtQuick/Controls/Styles/Desktop I don't see any icon or text property set, so how can one style this?

maxwell31

If I choose e.g. the Flat style, the treeView looks like this:

Here the text indicators at the left of the items are incorrectly placed. How could one fix this?

maxwell31

Can you tell me how the styles work? I read (http://doc.qt.io/qt-5/qtquick-controls-styles-qmlmodule.html ) that one can set styles. Is the default Linux/Windows style not a style in that sense?

I see in qquickstyleitem.cpp there is the line?

      case ItemBranchIndicator:
          qApp->style()->drawPrimitive(QStyle::PE_IndicatorBranch, m_styleoption, painter);

Is this where the itembranchindicator gets set?

Would it be possible to make a small custom style which is the same as the default style but replaces the itembranchindicator?

maxwell31

In order to make changes I tried using a TreeViewStyle:

TreeView {
  id: treeView
  model: treeModel  
  anchors.fill: parent
  style: teststyle
  TableViewColumn {
    width: 270
    id: namecolumn
    title: "Name"
    role: "ParName"
  
  }
  TableViewColumn {
    id: namecolumn2
    title: "value"
    role: "ParValue"
    delegate: valueDelegate
  }
}


TreeViewStyle {
  id: teststyle

  branchDelegate: Item {
    width: indentation
    height: 16
    Text {
      visible: styleData.column === 0 && styleData.hasChildren
      text: styleData.isExpanded ? "\u25bc" : "\u25b6"
      color: !control.activeFocus || styleData.selected ? styleData.textColor : "#666"
      font.pointSize: 10
      renderType: Text.NativeRendering
      style: Text.PlainText
      anchors.centerIn: parent
      anchors.verticalCenterOffset: 2
    }
  }
}

but then I get the following error

file:///home/Qt/5.10.0/gcc_64/qml/QtQuick/Controls/ScrollView.qml:365: TypeError: Cannot read property 'padding' of null
file:///home/Qt/5.10.0/gcc_64/qml/QtQuick/Controls/ScrollView.qml:364: TypeError: Cannot read property 'padding' of null
file:///home/Qt/5.10.0/gcc_64/qml/QtQuick/Controls/ScrollView.qml:363: TypeError: Cannot read property 'padding' of null
file:///home/Qt/5.10.0/gcc_64/qml/QtQuick/Controls/ScrollView.qml:362: TypeError: Cannot read property 'padding' of null
qrc:/ParameterSettings.qml:14:8: Unable to assign TreeViewStyle_QMLTYPE_104 to QQmlComponent