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  1. 31st August 2017, 18:37 #1
    drmacro
    drmacro is offline Novice
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    Default Tableview column size update

    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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    [/CODE]
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  2. 31st August 2017, 19:51 #2
    d_stranz's Avatar
    d_stranz
    d_stranz is offline Guru
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    Default Re: Tableview column size update

    The call to resizeColumnsToContents() in the __init__ function has no effect, since the table is not yet visible and therefore the geometry has not yet been calculated. This happens only just prior to the showEvent(). So the place to put this is to override showEvent() for your TDDlg and call it there. You'll also need to call it again each time the table contents changes. For that, you'll need to connect a slot to one of the model's signals that indicates a change (such as dataChanged()).
    <=== The Great Pumpkin says ===>
    Please use CODE tags when posting source code so it is more readable. Click "Go Advanced" and then the "#" icon to insert the tags. Paste your code between them.
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