How to generically set the Header Item Data

[Denni]

I am basically a newbie to Qt5 but a long time experienced software engineer I have in the last couple of weeks been able to figure out quite a few things about Qt5 but this one troubles me since I will eventually have numerous columns and I am having to set this information individually for each column using a separate "container" which seems counter-intuitive. This is what I have thus far -- what I am trying to figure out is how to have a single HdrItem and apply it to each of the HeaderLabels -- this gets added into a CenterPane = QSplitter(Qt.Horizontal, self) once its created and that works fine but having to do this for each and every column header seems rather cumbersome which is why it seems counter-intuitive to how Qt5 works. Note if I do not do it this way it complains about adding duplicates and only the first column header gets the formatting

//class ItemDsplyr(QTreeView):
    def __init__(self, parent):
        QTreeView.__init__(self, parent)

        HdrItem0 = QStandardItem()
        HdrItem1 = QStandardItem()
        HdrItem2 = QStandardItem()

        font = QFont()
        font.setBold(True)
        font.setPointSize(10)
        HdrItem0.setFont(font)
        HdrItem1.setFont(font)
        HdrItem2.setFont(font)

        brush = QBrush()
        brush.setColor(Qt.blue)
        brush.setStyle(Qt.SolidPattern)
        HdrItem0.setBackground(brush)

        HdrItem0.setForeground(brush)
        HdrItem1.setForeground(brush)
        HdrItem2.setForeground(brush)

        self.model = QStandardItemModel(0, 3)
        self.model.setHorizontalHeaderItem(0, HdrItem0)
        self.model.setHorizontalHeaderItem(1, HdrItem1)
        self.model.setHorizontalHeaderItem(2, HdrItem2)
        self.model.setHorizontalHeaderLabels(['Column1', 'Column2', 'Column3'])

        self.setModel(self.model)
        self.clicked.connect(self.itemSingleClicked)

[KillerSmath]

Hi @Denni

Have you tried to override a QStandardItemModel class ? It will allow you to custom a way to populate your Model and return specific data like for example your HeaderData.

[Denni]

No I have not as that seemed a bit excessive just to manipulate that bit of information but if there is no other way to manipulate that information then perhaps that is the only way. I am hoping for a much cleaner more intuitive approach as I feel that bit of information should be manipulatable without having to override a base class but then I could be wrong on that. Thanks for that suggestion though

[Denni]

okay @KillerSmath it appears you are correct and the QStandardItemModel class has to be overridden got help from someone on another forum and this was the solution:

class CustomItemModel(QStandardItemModel):
    def headerData(self, section, orientation, role):
        if role == Qt.ForegroundRole:
            brush = QBrush()
            brush.setColor(Qt.blue)
            brush.setStyle(Qt.SolidPattern)
            return brush
             
        elif role == Qt.BackgroundRole:
            brush = QBrush()
            brush.setColor(Qt.yellow)
            brush.setStyle(Qt.SolidPattern)
            return brush
         
        elif role == Qt.FontRole:
            font = QFont()
            font.setBold(True)
            font.setPointSize(10)
            return font
             
        return super().headerData(section, orientation, role)
 
class ItemDsplyr(QTreeView):
    def __init__(self):
        QTreeView.__init__(self)
   
        self.model = CustomItemModel(0, 3)
        self.model.setHorizontalHeaderLabels(['Column1', 'Column2', 'Column3'])
   
        self.setModel(self.model)
        self.clicked.connect(self.itemSingleClicked)
  
    def itemSingleClicked(self, index):
        Item = self.selectedIndexes()[0]
        ItemVal = Item.model().itemFromIndex(index).text()
        print("Item Clicked:",ItemVal)
  
    def SetContent(self):
        self.model.setRowCount(0)
  
        ItmRecSet = [
            {'CatgryName':'Cat-1', 'GroupName':'Run-Grp-1', 'ItemName':'Run-Itm-1'},
            {'CatgryName':'Cat-1', 'GroupName':'Run-Grp-1', 'ItemName':'Run-Itm-2'},
            {'CatgryName':'Cat-1', 'GroupName':'Run-Grp-1', 'ItemName':'Run-Itm-3'}
            ]
  
        for Item in ItmRecSet:
            ItmNam = QStandardItem(Item['ItemName'])
            CatNam = QStandardItem(Item['CatgryName'])
            GrpNam = QStandardItem(Item['GroupName'])
  
            self.model.appendRow([CatNam, GrpNam, ItmNam])