Tag: index.column()

Optimize PyQt5 QAbstractView for Pandas Model

Post author By Full Stack
Post date January 1, 2020
No Comments on Optimize PyQt5 QAbstractView for Pandas Model

I am currently writing a SQL query interface through Python. When writing the data into a QTableView, I am using a QAbstractTableModel to write the query result. This works fine for smaller queries, but becomes extremely slow when trying to present many rows and columns. Is there anyway to increase the speed that the dataframe […]

Tags 'toPyObject'): # PyQt4 gets a QVariant value = value.toPyObject() else: # PySide gets an unicode, "Value"), (df, ): return QtCore.QVariant() def data(self, ): return QtCore.QVariant() elif orientation == QtCore.Qt.Vertical: try: # return self.df, ascending=order == QtCore.Qt.AscendingOrder, but becomes extremely slow when trying to present many rows and columns. Is there anyway to increase the speed that the dataframe is loaded i, bytes): return QtCore.QVariant('(BLOB)') else: return QtCore.QVariant(str(self._df.iloc[index.r, col, col) self.conSig.dataChanged.emit(row, col) self.original_df.at[row, col] = value # This is the signal to my RDB class that a cell has changed and to update the rdb_DF., col] = value # This is the signal to my RDB class that a cell has changed and to update the rdb_DF. if role, col] = value #print(self.original_df) self.conSig.dataChanged.emit(row, column], drop=True) self.layoutChanged.emit() def flags(self, I am currently writing a SQL query interface through Python. When writing the data into a QTableView, I am using a QAbstractTableModel to write the query result. This works fine for smaller queries, index, index.column(), index.column()])) def setData(self, index.column()])) if isinstance(self._df.iloc[index.row(), index): return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemIsEditable I would appreciate any assistance I could get in increasin, inplace=True) self._df.reset_index(inplace=True, int)) and not(value.isnumeric()): return False else: value = None if value == '' els, int)) and value.isnumeric(): value = None if value == '' else dtype.type(value) self._df.loc[row, np.integer)) or isinstance(dtype, order): colname = self._df.columns.tolist()[column] self.layoutAboutToBeChanged.emit() self._df.sort_values(colname, orientation, parent) self._df = df.copy() self.original_df = df self.reason = reason # PyQt5 Slots and Signals i, parent=None): QtCore.QAbstractTableModel.__init__(self, parent=QtCore.QModelIndex()): return len(self._df.columns) def sort(self, parent=QtCore.QModelIndex()): return len(self._df.index) def columnCount(self, reason, role): row = self._df.index[index.row()] col = self._df.columns[index.column()] if hasattr(value, role=QtCore.Qt.DisplayRole): if not index.isValid(): return QtCore.QVariant() if role == QtCore.Qt.DisplayRole o, role=QtCore.Qt.DisplayRole): if role != QtCore.Qt.DisplayRole: return QtCore.QVariant() if orientation == QtCore, row, Section, self.original_df) return True def rowCount(self, value) return True elif ((np.issubdtype(dtype, value) return True else: self._df.loc[row

Development GitHub

How to alter dropEvent action in treeview without loosing basic drag-n-drop functionality in PyQt5?

Post author By Full Stack
Post date November 30, 2019
No Comments on How to alter dropEvent action in treeview without loosing basic drag-n-drop functionality in PyQt5?

I’m using my custom item model (subclassed from QAbstractItemModel) with custom QTreeView. I want to allow internal drag-n-drop movement (MoveAction) and, when modifier key or right mouse button is pressed, pass CopyAction to my model (to dropMimeData) to copy items. However, default implementation of dropEvent() in QTreeView seems (from C code) only capable of passing […]

Tags -2] [3, 'Action', 'baseact', 'exception', 'node') self.insertItems(row, 'text/xml'] def mimeData(self, "...": ""}} ui = ConfigDialog(data) ui.setupUi(Dialog) print(Qt.DisplayRole) Dialog.show() print(app.exec_()) prin, "...": {'subopt': 'bal'}}, "opt2": [1.1, "opt2": 123, "opt3": 1.23, "opt4": False, "section 2": {"opt1": "str", "Value"), "Value") self.setup(data) def headerData(self, )) return True def flags(self, [droppedNode], { 'parent':parent, 1, 1) self.config_view.expandAll() #self.config_view.setDragDropMode(True) #self.setDragDropMode(QAbstractItemView.Inte, 34, action & Qt.CopyAction) print(droppedNode.itemData, action) if action == Qt.IgnoreAction: return True droppedNode = deepcopy(pickle.loads(mimedata.data('app/configi, but works horribly in terms of user interaction because there are tons of comlex code determining right index to drop item on in default impl, childItem) else: return QtCore.QModelIndex() def parent(self, column): try: return self.itemData[column] except IndexError: return None def set_data(self, column): try: self.itemData[column] = data except IndexError: return False return True, column], config_dialog): super(ConfigDialog, count) -> ((), count) self.beginRemoveRows(parent, data: dict, data); }, data): super(ConfigDialog, default implementation of dropEvent() in QTreeView seems (from C code) only capable of passing MoveAction but when I try to reimplement dropE, dict): item = ConfigModelItem(key, e.dropAction(), e): index = self.indexAt(e.pos()) parent = index.parent() self.model().dropMimeData(e.mimeData(), e): print(e.dropAction(), I'm using my custom item model (subclassed from QAbstractItemModel) with custom QTreeView. I want to allow internal drag-n-drop movement (Mov, index, index.column(), index.column()) self.dataChanged.emit(index, index.row(), index.row()) parentItem = self.nodeFromIndex(parent) parentItem.removeChild(index.row()) self.endRemoveRows(), index.row()) self.model().dropMimeData(e.mimeData(), index): if index.isValid(): return index.internalPointer() return self.rootItem def data(self, index): if not index.isValid(): return QtCore.QModelIndex() childItem = index.internalPointer() parentIt, index): if not index.isValid(): return QtCore.Qt.ItemIsDragEnabled | QtCore.Qt.ItemIsDropEnabled # Qt.NoItemFlags, index): parent = index.parent() self.beginRemoveRows(parent, indexes): mimedata = QtCore.QMimeData() index = indexes[0] mimedata.setData('app/configitem', is_section=False, is_section=True) self.setup(value, item_data = item.itemData if item.childItems: data[item_name] = self.to_dict(item) else:, item): self.childItems.append(item) item.parentItem = self def addChildren(self, items, label: '' }, mimedata, orientation, parent) e.accept() ... it works, parent) e.accept() def open_menu(self): menu = QMenu() menu.addAction("Create new item") menu.exec_(QCu, parent): if not self.hasIndex(row, parent): if parent.column() > 0: return 0 if not parent.isValid(): parentItem = self.rootItem, parent): print('rem', parent): return 2 def rowCount(self, parent): return QtCore.QModelIndex() parentItem = self.nodeFromIndex(parent) childItem = parentItem.child(row), parent=item) else: parent.appendChild(ConfigModelItem(key, parent=None) -> dict: if parent is None: parent = self.rootItem data = {} for item in parent.childItems:, parent=None): if parent is None: parent = self.rootItem for key, parent=None): self.itemData = [label, parent=None): super(ConfigModel, parentIndex) if action & Qt.CopyAction: return False # to not delete original item return True def removeRo, parentIndex) return True def setup(self, parentIndex) self.dataChanged.emit(parentIndex, parentIndex): print('action', parentIndex): print('ins', parentItem) def nodeFromIndex(self, pass CopyAction to my model (to dropMimeData) to copy items. However, pickle.dumps(self.nodeFromIndex(index))) return mimedata def dropMimeData(self, position): if position len(self.childItems): return False child = self.childItems.pop(position), QMenu class ConfigModelItem: def __init__(self, QStandardItemModel from PyQt5.QtWidgets import QAbstractItemView, QtCore.Qt.CopyAction) # if e.keyboardModifiers() & QtCore.Qt.AltModifier: # #e.setDropAction(QtCore.Qt.CopyAction), QtGui, QTreeView, QtWidgets from PyQt5.QtCore import Qt as Qt from PyQt5.QtGui import QCursor, role, role): if not index.isValid(): return None item = index.internalPointer() if role == Qt.DisplayRole or, role): if role == Qt.DisplayRole and orientation == Qt.Horizontal: return self.rootItem.data(section) def columnCoun, role=Qt.EditRole): if not index.isValid(): return False item = index.internalPointer() if role == Qt.Edi, row, row) parent = self.nodeFromIndex(parentIndex) self.beginInsertRows(parentIndex, row) print(parent.childItems) self.endInsertRows() self.dataChanged.emit(parentIndex, row): if row == -1: row = 0 self.childItems[row:row] = items for item in items: item.parentI, row): return self.childItems[row] def childCount(self): return len(self.childItems) def columnCount(self):, row+count-1) parentItem = self.nodeFromIndex(parent) for x in range(count): parentItem.removeChild(row), row+len(items)-1) parent.addChildren(items, Section, self).__init__() self.model = ConfigModel(data) def setupUi(self, self).__init__(parent) self.rootItem = ConfigModelItem("Option", self).dropEvent(e) dropAction() data is also lost. What can I do in order to modify dropAction without loosing all fancy things that default, self).dropEvent(e) index = self.indexAt(e.pos()) parent = index.parent() print('in', self).setupUi(config_dialog) self.config_view = Tree() self.config_view.setObjectName("config_view") self.config_vie, state='default', traceback) sys.excepthook = except_hook app = QtWidgets.QApplication(sys.argv) Dialog = QtWidgets.QDialog() data = {"secti, traceback): sys.__excepthook__(cls, value in data.items(): if isinstance(value, value)) def to_dict(self, value] self.is_section = is_section self.state = state self.childItems = [] self.parentItem = parent, when modifier key or right mouse button is pressed

Development Plugins

How to clear and redraw MapPolyline in Qt

Post author By Full Stack
Post date November 6, 2019
No Comments on How to clear and redraw MapPolyline in Qt

I have MapPolyline on my map and want to clear that polyline and redraw new polyline when user click on mouseclick area. I am using clearMapItem() to clear MapPolyline. The problem is I’m unable to redraw MapPolyline once it clear. Also I want to add markers on map. I took PositionRole for marker but not […]

Tags "positionData" }, "waypoint"); } Button { id: button2 x: 45 y: 29, [&](MyListItem const& obj) { return obj.getLatitude() == name; } ); if(it != myList.end()){, { PositionRole, { role } ); return true ; } QVariant MyListModel::data(const QModelIndex &index, }; } explicit MyListModel(QObject *parent = nullptr); Q_INVOKABLE bool addAsset(QGeoCoordinate coord, 6)); it.setLongitude(QString::number(coord.longitude(), 6)); myList << it; endInsertRows(); return true; } int MyListModel::rowCount(const QModelIndex, 73.789803)//KORD MapItemView { model: Lists delegate: mapcomponent } MapPolyline {, const QString &name); bool createAsset(QGeoCoordinate coord, const QString &name); int rowCount(const QModelIndex &parent = QModelIndex()) const override; bool setData(const QModelIndex &index, const QString &name){ auto it = std::find_if(myList.begin(), const QString &name){ beginInsertRows(QModelIndex(), const QVariant &value, f: '' }, I have MapPolyline on my map and want to clear that polyline and redraw new polyline when user click on mouseclick area. I am using clearMapI, index, index.column(), index.parent()) || !value.isValid()) return false; MyListItem &item = myList[index.row()]; if (role == Lo, index.parent())) return {}; const MyListItem &item = myList.at(index.row()); if (role == LongitudeRole) return item.m_lon, int role = Qt::DisplayRole) const override; Q_INVOKABLE void clearData(); private: QList myList; };, int role) { if (!hasIndex(index.row(), int role) const { if (!hasIndex(index.row(), int role) override; QVariant data(const QModelIndex & index, latitude, longitude), LongitudeRole, LongitudeRole); } else{ return createAsset(coord, mouse.y)) var poly= polylineId.addCoordinate(cordinate); Lists.addAsset(cordinate, myList.end(), name);}} bool MyListModel::createAsset(QGeoCoordinate coord, PositionRole }; QHash<int, QByteArray> roleNames() const override { return { { LatitudeRole, QVariant::fromValue(coord), rowCount, rowCount()); MyListItem it; it.setLatitude(QString::number(coord.latitude()

Development

Prevent ComboBox editing in StyledItemDelegate

Post author By Full Stack
Post date October 5, 2019
No Comments on Prevent ComboBox editing in StyledItemDelegate

I am trying to make everything shown by the current code un-editable. Previous searches all suggest either modifying the flags() function of the model or using the setEditTriggers of the table. I do both in this code, but neither of them work. Looking at a widget-by-widget case, I can find readonly modes for LineEdit and […]

Tags 'Dog']) return widget def setModelData(self, "Value"), "widget", *args): super().__init__(*args) tableview = TableView() layout = QtWidgets.QVBoxLayout(self) layout.addWidget, $option, but neither of them work. Looking at a widget-by-widget case, but not for ComboBox. So I can not even modify the delegate to force the readonly constraint, cat, column) self.openPersistentEditor(index) if __name__ == '__main__': app = QtWidgets.QApplication(sys.argv) w = MyWin, I am trying to make everything shown by the current code un-editable. Previous searches all suggest either modifying the flags() function of, I can find readonly modes for LineEdit and others, index, index.column(), index): return QtCore.Qt.ItemIsEnabled def data(self, index): self.model.setData(index, index): widget = QtWidgets.QComboBox(parent) widget.addItems(['', model, model): super().__init__() self.model = model def createEditor(self, not that I would necessarily like to do it this way. EDIT: to clarify, parent, parent=None): QtCore.QAbstractTableModel.__init__(self, parent=None): super().__init__(parent) self.model = Model(self) delegate = Delegate(self.model) self.setItemD, parent=parent) self.value = 0 def flags(self, parent=QtCore.QModelIndex()): return 1 class TableView(QtWidgets.QTableView): def __init__(self, parent=QtCore.QModelIndex()): return 1 def columnCount(self, QtWidgets import sys class MyWindow(QtWidgets.QWidget): def __init__(self, role=QtCore.Qt.DisplayRole): if not index.isValid() or role != QtCore.Qt.DisplayRole: return QtCore.QVariant() re, role=QtCore.Qt.EditRole): self.value = value print("data[{}][{}] = {}".format(index.row(), value)) return True def rowCount(self, when I say I want the user to not be able to 'edit' I mean that he shouldn't be able to change the state of the widget in any way. E.g. he wo, widget.currentIndex()) class Model(QtCore.QAbstractTableModel): def __init__(self