Source code for ccpn.ui.gui.widgets.Spinbox

"""Module Documentation here

"""
#=========================================================================================
# Licence, Reference and Credits
#=========================================================================================
__copyright__ = "Copyright (C) CCPN project (http://www.ccpn.ac.uk) 2014 - 2020"
__credits__ = ("Ed Brooksbank, Luca Mureddu, Timothy J Ragan & Geerten W Vuister")
__licence__ = ("CCPN licence. See http://www.ccpn.ac.uk/v3-software/downloads/license")
__reference__ = ("Skinner, S.P., Fogh, R.H., Boucher, W., Ragan, T.J., Mureddu, L.G., & Vuister, G.W.",
                 "CcpNmr AnalysisAssign: a flexible platform for integrated NMR analysis",
                 "J.Biomol.Nmr (2016), 66, 111-124, http://doi.org/10.1007/s10858-016-0060-y")
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# Last code modification
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__modifiedBy__ = "$modifiedBy: Ed Brooksbank $"
__dateModified__ = "$dateModified: 2020-10-27 09:43:03 +0000 (Tue, October 27, 2020) $"
__version__ = "$Revision: 3.0.1 $"
#=========================================================================================
# Created
#=========================================================================================
__author__ = "$Author: CCPN $"
__date__ = "$Date: 2017-04-07 10:28:41 +0000 (Fri, April 07, 2017) $"
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# Start of code
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from contextlib import contextmanager
from PyQt5 import QtGui, QtWidgets, QtCore
from PyQt5.QtCore import pyqtSignal
from ccpn.ui.gui.widgets.Base import Base


[docs]class Spinbox(QtWidgets.QSpinBox, Base): returnPressed = pyqtSignal(int) wheelChanged = pyqtSignal(int) def __init__(self, parent, prefix=None, value=None, step=None, min=None, max=None, showButtons=True, callback=None, editable=True, **kwds): super().__init__(parent) Base._init(self, **kwds) if min is not None: self.setMinimum(min) if max is not None: self.setMaximum(max) if value is not None: #set Value only after you set min and max self.setValue(value) if step is not None: self.setSingleStep(step) if prefix: self.setPrefix(prefix + ' ') if showButtons is False: self.setButtonSymbols(QtWidgets.QAbstractSpinBox.NoButtons) self._callback = None self.setCallback(callback) lineEdit = self.lineEdit() lineEdit.returnPressed.connect(self._keyPressed) self._internalWheelEvent = True self._keyPressed = False # change focusPolicy so that spinboxes don't grab focus unless selected self.setFocusPolicy(QtCore.Qt.StrongFocus) self.setStyleSheet('Spinbox { padding: 3px 3px 3px 3px; }' 'Spinbox:disabled { background-color: white; }')
[docs] def wheelEvent(self, event: QtGui.QWheelEvent) -> None: """Process the wheelEvent for the spinBox """ # emit the value when wheel event has occurred, only when hasFocus if self.hasFocus(): super().wheelEvent(event) self.wheelChanged.emit(self.value()) else: event.ignore()
@contextmanager def _useExternalWheelEvent(self): try: self._internalWheelEvent = False yield finally: self._internalWheelEvent = True def _externalWheelEvent(self, event): with self._useExternalWheelEvent(): self.wheelEvent(event)
[docs] def stepBy(self, steps: int) -> None: if self._internalWheelEvent: super().stepBy(steps) else: super().stepBy(1 if steps > 0 else -1 if steps < 0 else steps)
[docs] def get(self): return self.value()
[docs] def set(self, p_int): self.setValue(p_int)
def _keyPressed(self, *args): """emit the value when return has been pressed """ self.returnPressed.emit(self.value())
[docs] def setCallback(self, callback): """Sets callback; disconnects if callback=None """ if self._callback is not None: self.valueChanged.disconnect() if callback: self.valueChanged.connect(callback) self._callback = callback
def _getSaveState(self): """ Internal. Called for saving/restoring the widget state. """ return self.get() def _setSavedState(self, value): """ Internal. Called for saving/restoring the widget state. """ return self.set(value)
if __name__ == '__main__': from ccpn.ui.gui.widgets.Application import TestApplication from ccpn.ui.gui.popups.Dialog import CcpnDialog app = TestApplication() popup = CcpnDialog() sb = Spinbox(popup, step=10, grid=(0, 0)) sb.setPrefix('H Weight ') popup.show() popup.raise_() app.start()