I'm using a delegate to display the data in a table.

The goal is to display an indicator with some text.

And that part works. But, I can't seem to figure out how to get the column width to resize to fit the painted cell width. (If I expand the width of the column, the complete string is there)

It appears that it is sizing the columns based on the with of the header data, not the cell data.

(I've "translated" this from an example in C++, and between my level of QT expertise and the translating...I probably have missed something obvious. )

The main window starts:

Qt Code: 
  1. class TDDlg(QtWidgets.QMainWindow):
  2.  
  3.     #CueFileUpdate_sig = pyqtSignal()
  4.     def __init__(self, parent=None):
  5.         super(TDDlg, self).__init__(parent)
  6.         self.setupUi(self)
  7.         self.tableheader_horz = self.get_header_horz()
  8.         self.tableheader_vert = []
  9.         #self.tableView.doubleClicked.connect(self.on_table_dblclick)
  10.         #self.tableView.clicked.connect(self.on_table_click)
  11.         self.tabledata = []
  12.         self.get_table_data()
  13.         self.leveldata = []
  14.         self.get_level_data()
  15.         self.tablemodel = MyTableModel(self.tabledata, self.leveldata, self.tableheader_horz, self.tableheader_vert, self)
  16.         self.tableView.setModel(self.tablemodel)
  17.         #self.tableView.setItemDelegateForColumn(3, CellDelegate())
  18.         self.tableView.setItemDelegate(CellDelegate())
  19.         self.tableView.setSelectionMode(QAbstractItemView.SingleSelection)
  20.         self.tableView.setSelectionBehavior(QAbstractItemView.SelectItems)
  21.         self.tableView.resizeColumnsToContents()
  22.         i = self.tableView.model().index(0, 0)
  23.  
  24.     def setupUi(self, MainWindow):
  25.         MainWindow.setObjectName("MainWindow")
  26.         MainWindow.resize(800, 600)
  27.         self.centralwidget = QtWidgets.QWidget(MainWindow)
  28.         self.centralwidget.setObjectName("centralwidget")
  29.         self.gridLayout_2 = QtWidgets.QGridLayout(self.centralwidget)
  30.         self.gridLayout_2.setObjectName("gridLayout_2")
  31.         self.gridLayout = QtWidgets.QGridLayout()
  32.         self.gridLayout.setObjectName("gridLayout")
  33.         self.tableView = QtWidgets.QTableView(self.centralwidget)
  34.         self.tableView.setObjectName("tableView")
  35.         self.gridLayout.addWidget(self.tableView, 0, 0, 1, 1)
  36.         self.gridLayout_2.addLayout(self.gridLayout, 0, 0, 1, 1)
  37.         MainWindow.setCentralWidget(self.centralwidget)
  38.         self.menubar = QtWidgets.QMenuBar(MainWindow)
  39.         self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 28))
  40.         self.menubar.setObjectName("menubar")
  41.         MainWindow.setMenuBar(self.menubar)
  42.         self.statusbar = QtWidgets.QStatusBar(MainWindow)
  43.         self.statusbar.setObjectName("statusbar")
  44.         MainWindow.setStatusBar(self.statusbar)
  45.         self.toolBar = QtWidgets.QToolBar(MainWindow)
  46.         self.toolBar.setObjectName("toolBar")
  47.         MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.toolBar)
  48.  
  49.         self.retranslateUi(MainWindow)
  50.         QtCore.QMetaObject.connectSlotsByName(MainWindow)
  51.  
  52.  
  53. And the model and the delegate:
  54.  
  55. [CODE]
  56. class MyTableModel(QtCore.QAbstractTableModel):
  57.     def __init__(self, datain, leveldata, headerdata_horz, headerdata_vert, parent=None):
  58.         QtCore.QAbstractTableModel.__init__(self, parent)
  59.         self.arraydata = datain
  60.         self.leveldata = leveldata
  61.         self.headerdata_horz = headerdata_horz
  62.         self.headerdata_vert = headerdata_vert
  63.  
  64.     def rowCount(self, parent):
  65.         if parent.isValid():
  66.             return 0
  67.         return len(self.arraydata)
  68.  
  69.     def columnCount(self, parent):
  70.         if parent.isValid():
  71.             return 0
  72.         else:
  73.             if self.arraydata:
  74.                 return len(self.arraydata[0])
  75.             else:
  76.                 return 0
  77.  
  78.     def data(self, index, role):  # Return data from the model
  79.         if not index.isValid():
  80.             logging.info('Invalid index in MyModel>data')
  81.             retval = QtCore.QVariant()
  82.         elif role == QtCore.Qt.BackgroundRole:
  83.             cell_contents = self.arraydata[index.row()][index.column()]
  84.             if cell_contents[-1] == '0':
  85.                 retval = QtCore.QVariant()
  86.             else:
  87.                 retval = QBrush(Qt.red)
  88.         elif role == QtCore.Qt.DisplayRole:
  89.             retval = QtCore.QVariant(self.arraydata[index.row()][index.column()])
  90.         else:
  91.             retval = QtCore.QVariant()
  92.  
  93.         return retval
  94.  
  95.     def setData(self, index, value, role):  # Set data in the model
  96.         if role == QtCore.Qt.EditRole and index.isValid():
  97.             print(index.row())
  98.             self.arraydata[index.row()][index.column()] = value
  99.             print('Return from rowCount: {0}'.format(self.rowCount(index)))
  100.             self.dataChanged.emit(index, index, [QtCore.Qt.DisplayRole])
  101.             return True
  102.         return False
  103.  
  104.     def headerData(self, col, orientation, role):
  105.         if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
  106.             if col < len(self.headerdata_horz):
  107.                 return QtCore.QVariant(self.headerdata_horz[col])
  108.             else:
  109.                 return QtCore.QVariant('')
  110.         elif orientation == QtCore.Qt.Vertical and role == QtCore.Qt.DisplayRole:
  111.             if col < len(self.headerdata_vert):
  112.                 return QtCore.QVariant(self.headerdata_vert[col])
  113.             else:
  114.                 return QtCore.QVariant('')
  115.  
  116.         return QtCore.QVariant()
  117.  
  118. class CellDelegate(QStyledItemDelegate):
  119.     def __init__(self):
  120.         QStyledItemDelegate.__init__(self)
  121.         self.diameter = 10
  122.     def paint(self, painter, item, modelindex): #QStyleOptionViewItem
  123.         diameter = min(item.rect.width(),item.rect.height())
  124.         self.diameter = diameter
  125.         adjustedRect = copy.copy(item.rect)
  126.         adjustedRect.setWidth(diameter)
  127.         adjustedRect.setHeight(diameter)
  128.         adjustedRect = adjustedRect.adjusted(5,5,-5,-5)
  129.         shade = 120
  130.         background = QColor(shade, shade, 128)
  131.         painter.setPen(background)
  132.         painter.setBrush(background)
  133.         painter.drawEllipse(adjustedRect)
  134.         val = modelindex.data()
  135.         level = '>' + val.split(':')[0] + ':' + str(int_to_db(int(val.split(':')[1])))
  136.         painter.setPen(Qt.red)
  137.         painter.drawText(item.rect.adjusted(round(diameter * 1.1),0,0,0),
  138.                          QtCore.Qt.AlignHCenter | QtCore.Qt.AlignVCenter,
  139.                          level)
  140.         return
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