Source code for pyqtgraph.widgets.TableWidget

# -*- coding: utf-8 -*-
import numpy as np
from ..Qt import QtGui, QtCore
from ..python2_3 import asUnicode, basestring
from .. import metaarray


__all__ = ['TableWidget']


def _defersort(fn):
    def defersort(self, *args, **kwds):
        # may be called recursively; only the first call needs to block sorting
        setSorting = False
        if self._sorting is None:
            self._sorting = self.isSortingEnabled()
            setSorting = True
            self.setSortingEnabled(False)
        try:
            return fn(self, *args, **kwds)
        finally:
            if setSorting:
                self.setSortingEnabled(self._sorting)
                self._sorting = None
                
    return defersort


[docs]class TableWidget(QtGui.QTableWidget): """Extends QTableWidget with some useful functions for automatic data handling and copy / export context menu. Can automatically format and display a variety of data types (see :func:`setData() <pyqtgraph.TableWidget.setData>` for more information. """
[docs] def __init__(self, *args, **kwds): """ All positional arguments are passed to QTableWidget.__init__(). ===================== ================================================= **Keyword Arguments** editable (bool) If True, cells in the table can be edited by the user. Default is False. sortable (bool) If True, the table may be soted by clicking on column headers. Note that this also causes rows to appear initially shuffled until a sort column is selected. Default is True. *(added in version 0.9.9)* ===================== ================================================= """ QtGui.QTableWidget.__init__(self, *args) self.itemClass = TableWidgetItem self.setVerticalScrollMode(self.ScrollPerPixel) self.setSelectionMode(QtGui.QAbstractItemView.ContiguousSelection) self.setSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Preferred) self.clear() kwds.setdefault('sortable', True) kwds.setdefault('editable', False) self.setEditable(kwds.pop('editable')) self.setSortingEnabled(kwds.pop('sortable')) if len(kwds) > 0: raise TypeError("Invalid keyword arguments '%s'" % kwds.keys()) self._sorting = None # used when temporarily disabling sorting self._formats = {None: None} # stores per-column formats and entire table format self.sortModes = {} # stores per-column sort mode self.itemChanged.connect(self.handleItemChanged) self.contextMenu = QtGui.QMenu() self.contextMenu.addAction('Copy Selection').triggered.connect(self.copySel) self.contextMenu.addAction('Copy All').triggered.connect(self.copyAll) self.contextMenu.addAction('Save Selection').triggered.connect(self.saveSel) self.contextMenu.addAction('Save All').triggered.connect(self.saveAll)
[docs] def clear(self): """Clear all contents from the table.""" QtGui.QTableWidget.clear(self) self.verticalHeadersSet = False self.horizontalHeadersSet = False self.items = [] self.setRowCount(0) self.setColumnCount(0) self.sortModes = {}
[docs] def setData(self, data): """Set the data displayed in the table. Allowed formats are: * numpy arrays * numpy record arrays * metaarrays * list-of-lists [[1,2,3], [4,5,6]] * dict-of-lists {'x': [1,2,3], 'y': [4,5,6]} * list-of-dicts [{'x': 1, 'y': 4}, {'x': 2, 'y': 5}, ...] """ self.clear() self.appendData(data) self.resizeColumnsToContents()
@_defersort def appendData(self, data): """ Add new rows to the table. See :func:`setData() <pyqtgraph.TableWidget.setData>` for accepted data types. """ startRow = self.rowCount() fn0, header0 = self.iteratorFn(data) if fn0 is None: self.clear() return it0 = fn0(data) try: first = next(it0) except StopIteration: return fn1, header1 = self.iteratorFn(first) if fn1 is None: self.clear() return firstVals = [x for x in fn1(first)] self.setColumnCount(len(firstVals)) if not self.verticalHeadersSet and header0 is not None: labels = [self.verticalHeaderItem(i).text() for i in range(self.rowCount())] self.setRowCount(startRow + len(header0)) self.setVerticalHeaderLabels(labels + header0) self.verticalHeadersSet = True if not self.horizontalHeadersSet and header1 is not None: self.setHorizontalHeaderLabels(header1) self.horizontalHeadersSet = True i = startRow self.setRow(i, firstVals) for row in it0: i += 1 self.setRow(i, [x for x in fn1(row)]) if self._sorting and self.horizontalHeader().sortIndicatorSection() >= self.columnCount(): self.sortByColumn(0, QtCore.Qt.AscendingOrder) def setEditable(self, editable=True): self.editable = editable for item in self.items: item.setEditable(editable)
[docs] def setFormat(self, format, column=None): """ Specify the default text formatting for the entire table, or for a single column if *column* is specified. If a string is specified, it is used as a format string for converting float values (and all other types are converted using str). If a function is specified, it will be called with the item as its only argument and must return a string. Setting format = None causes the default formatter to be used instead. Added in version 0.9.9. """ if format is not None and not isinstance(format, basestring) and not callable(format): raise ValueError("Format argument must string, callable, or None. (got %s)" % format) self._formats[column] = format if column is None: # update format of all items that do not have a column format # specified for c in range(self.columnCount()): if self._formats.get(c, None) is None: for r in range(self.rowCount()): item = self.item(r, c) if item is None: continue item.setFormat(format) else: # set all items in the column to use this format, or the default # table format if None was specified. if format is None: format = self._formats[None] for r in range(self.rowCount()): item = self.item(r, column) if item is None: continue item.setFormat(format)
def iteratorFn(self, data): ## Return 1) a function that will provide an iterator for data and 2) a list of header strings if isinstance(data, list) or isinstance(data, tuple): return lambda d: d.__iter__(), None elif isinstance(data, dict): return lambda d: iter(d.values()), list(map(asUnicode, data.keys())) elif (hasattr(data, 'implements') and data.implements('MetaArray')): if data.axisHasColumns(0): header = [asUnicode(data.columnName(0, i)) for i in range(data.shape[0])] elif data.axisHasValues(0): header = list(map(asUnicode, data.xvals(0))) else: header = None return self.iterFirstAxis, header elif isinstance(data, np.ndarray): return self.iterFirstAxis, None elif isinstance(data, np.void): return self.iterate, list(map(asUnicode, data.dtype.names)) elif data is None: return (None,None) else: msg = "Don't know how to iterate over data type: {!s}".format(type(data)) raise TypeError(msg) def iterFirstAxis(self, data): for i in range(data.shape[0]): yield data[i] def iterate(self, data): # for numpy.void, which can be iterated but mysteriously # has no __iter__ (??) for x in data: yield x def appendRow(self, data): self.appendData([data]) @_defersort def addRow(self, vals): row = self.rowCount() self.setRowCount(row + 1) self.setRow(row, vals) @_defersort def setRow(self, row, vals): if row > self.rowCount() - 1: self.setRowCount(row + 1) for col in range(len(vals)): val = vals[col] item = self.itemClass(val, row) item.setEditable(self.editable) sortMode = self.sortModes.get(col, None) if sortMode is not None: item.setSortMode(sortMode) format = self._formats.get(col, self._formats[None]) item.setFormat(format) self.items.append(item) self.setItem(row, col, item) item.setValue(val) # Required--the text-change callback is invoked # when we call setItem.
[docs] def setSortMode(self, column, mode): """ Set the mode used to sort *column*. ============== ======================================================== **Sort Modes** value Compares item.value if available; falls back to text comparison. text Compares item.text() index Compares by the order in which items were inserted. ============== ======================================================== Added in version 0.9.9 """ for r in range(self.rowCount()): item = self.item(r, column) if hasattr(item, 'setSortMode'): item.setSortMode(mode) self.sortModes[column] = mode
def sizeHint(self): # based on http://stackoverflow.com/a/7195443/54056 width = sum(self.columnWidth(i) for i in range(self.columnCount())) width += self.verticalHeader().sizeHint().width() width += self.verticalScrollBar().sizeHint().width() width += self.frameWidth() * 2 height = sum(self.rowHeight(i) for i in range(self.rowCount())) height += self.verticalHeader().sizeHint().height() height += self.horizontalScrollBar().sizeHint().height() return QtCore.QSize(width, height)
[docs] def serialize(self, useSelection=False): """Convert entire table (or just selected area) into tab-separated text values""" if useSelection: selection = self.selectedRanges()[0] rows = list(range(selection.topRow(), selection.bottomRow() + 1)) columns = list(range(selection.leftColumn(), selection.rightColumn() + 1)) else: rows = list(range(self.rowCount())) columns = list(range(self.columnCount())) data = [] if self.horizontalHeadersSet: row = [] if self.verticalHeadersSet: row.append(asUnicode('')) for c in columns: row.append(asUnicode(self.horizontalHeaderItem(c).text())) data.append(row) for r in rows: row = [] if self.verticalHeadersSet: row.append(asUnicode(self.verticalHeaderItem(r).text())) for c in columns: item = self.item(r, c) if item is not None: row.append(asUnicode(item.value)) else: row.append(asUnicode('')) data.append(row) s = '' for row in data: s += ('\t'.join(row) + '\n') return s
[docs] def copySel(self): """Copy selected data to clipboard.""" QtGui.QApplication.clipboard().setText(self.serialize(useSelection=True))
[docs] def copyAll(self): """Copy all data to clipboard.""" QtGui.QApplication.clipboard().setText(self.serialize(useSelection=False))
[docs] def saveSel(self): """Save selected data to file.""" self.save(self.serialize(useSelection=True))
[docs] def saveAll(self): """Save all data to file.""" self.save(self.serialize(useSelection=False))
def save(self, data): fileName = QtGui.QFileDialog.getSaveFileName(self, "Save As..", "", "Tab-separated values (*.tsv)") if fileName == '': return open(fileName, 'w').write(data) def contextMenuEvent(self, ev): self.contextMenu.popup(ev.globalPos()) def keyPressEvent(self, ev): if ev.key() == QtCore.Qt.Key_C and ev.modifiers() == QtCore.Qt.ControlModifier: ev.accept() self.copySel() else: QtGui.QTableWidget.keyPressEvent(self, ev) def handleItemChanged(self, item): item.itemChanged()
class TableWidgetItem(QtGui.QTableWidgetItem): def __init__(self, val, index, format=None): QtGui.QTableWidgetItem.__init__(self, '') self._blockValueChange = False self._format = None self._defaultFormat = '%0.3g' self.sortMode = 'value' self.index = index flags = QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled self.setFlags(flags) self.setValue(val) self.setFormat(format) def setEditable(self, editable): """ Set whether this item is user-editable. """ if editable: self.setFlags(self.flags() | QtCore.Qt.ItemIsEditable) else: self.setFlags(self.flags() & ~QtCore.Qt.ItemIsEditable) def setSortMode(self, mode): """ Set the mode used to sort this item against others in its column. ============== ======================================================== **Sort Modes** value Compares item.value if available; falls back to text comparison. text Compares item.text() index Compares by the order in which items were inserted. ============== ======================================================== """ modes = ('value', 'text', 'index', None) if mode not in modes: raise ValueError('Sort mode must be one of %s' % str(modes)) self.sortMode = mode def setFormat(self, fmt): """Define the conversion from item value to displayed text. If a string is specified, it is used as a format string for converting float values (and all other types are converted using str). If a function is specified, it will be called with the item as its only argument and must return a string. Added in version 0.9.9. """ if fmt is not None and not isinstance(fmt, basestring) and not callable(fmt): raise ValueError("Format argument must string, callable, or None. (got %s)" % fmt) self._format = fmt self._updateText() def _updateText(self): self._blockValueChange = True try: self._text = self.format() self.setText(self._text) finally: self._blockValueChange = False def setValue(self, value): self.value = value self._updateText() def itemChanged(self): """Called when the data of this item has changed.""" if self.text() != self._text: self.textChanged() def textChanged(self): """Called when this item's text has changed for any reason.""" self._text = self.text() if self._blockValueChange: # text change was result of value or format change; do not # propagate. return try: self.value = type(self.value)(self.text()) except ValueError: self.value = str(self.text()) def format(self): if callable(self._format): return self._format(self) if isinstance(self.value, (float, np.floating)): if self._format is None: return self._defaultFormat % self.value else: return self._format % self.value else: return asUnicode(self.value) def __lt__(self, other): if self.sortMode == 'index' and hasattr(other, 'index'): return self.index < other.index if self.sortMode == 'value' and hasattr(other, 'value'): return self.value < other.value else: return self.text() < other.text() if __name__ == '__main__': app = QtGui.QApplication([]) win = QtGui.QMainWindow() t = TableWidget() win.setCentralWidget(t) win.resize(800,600) win.show() ll = [[1,2,3,4,5]] * 20 ld = [{'x': 1, 'y': 2, 'z': 3}] * 20 dl = {'x': list(range(20)), 'y': list(range(20)), 'z': list(range(20))} a = np.ones((20, 5)) ra = np.ones((20,), dtype=[('x', int), ('y', int), ('z', int)]) t.setData(ll) ma = metaarray.MetaArray(np.ones((20, 3)), info=[ {'values': np.linspace(1, 5, 20)}, {'cols': [ {'name': 'x'}, {'name': 'y'}, {'name': 'z'}, ]} ]) t.setData(ma)