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Diffstat (limited to 'examples/widgets/itemviews/fetchmore.py')
| -rw-r--r-- | examples/widgets/itemviews/fetchmore.py | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/examples/widgets/itemviews/fetchmore.py b/examples/widgets/itemviews/fetchmore.py deleted file mode 100644 index 7db8ae447..000000000 --- a/examples/widgets/itemviews/fetchmore.py +++ /dev/null @@ -1,147 +0,0 @@ - -############################################################################# -## -## Copyright (C) 2009 Darryl Wallace, 2009 <wallacdj@gmail.com> -## Copyright (C) 2013 Riverbank Computing Limited. -## Copyright (C) 2016 The Qt Company Ltd. -## Contact: http://www.qt.io/licensing/ -## -## This file is part of the Qt for Python examples of the Qt Toolkit. -## -## $QT_BEGIN_LICENSE:BSD$ -## You may use this file under the terms of the BSD license as follows: -## -## "Redistribution and use in source and binary forms, with or without -## modification, are permitted provided that the following conditions are -## met: -## * Redistributions of source code must retain the above copyright -## notice, this list of conditions and the following disclaimer. -## * Redistributions in binary form must reproduce the above copyright -## notice, this list of conditions and the following disclaimer in -## the documentation and/or other materials provided with the -## distribution. -## * Neither the name of The Qt Company Ltd nor the names of its -## contributors may be used to endorse or promote products derived -## from this software without specific prior written permission. -## -## -## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -## -## $QT_END_LICENSE$ -## -############################################################################# - -from PySide2 import QtCore, QtGui, QtWidgets - - -class FileListModel(QtCore.QAbstractListModel): - numberPopulated = QtCore.Signal(int) - - def __init__(self, parent=None): - super(FileListModel, self).__init__(parent) - - self.fileCount = 0 - self.fileList = [] - - def rowCount(self, parent=QtCore.QModelIndex()): - return self.fileCount - - def data(self, index, role=QtCore.Qt.DisplayRole): - if not index.isValid(): - return None - - if index.row() >= len(self.fileList) or index.row() < 0: - return None - - if role == QtCore.Qt.DisplayRole: - return self.fileList[index.row()] - - if role == QtCore.Qt.BackgroundRole: - batch = (index.row() // 100) % 2 -# FIXME: QGuiApplication::palette() required - if batch == 0: - return QtWidgets.qApp.palette().base() - - return QtWidgets.qApp.palette().alternateBase() - - return None - - def canFetchMore(self, index): - return self.fileCount < len(self.fileList) - - def fetchMore(self, index): - remainder = len(self.fileList) - self.fileCount - itemsToFetch = min(100, remainder) - - self.beginInsertRows(QtCore.QModelIndex(), self.fileCount, - self.fileCount + itemsToFetch) - - self.fileCount += itemsToFetch - - self.endInsertRows() - - self.numberPopulated.emit(itemsToFetch) - - def setDirPath(self, path): - dir = QtCore.QDir(path) - - self.beginResetModel() - self.fileList = list(dir.entryList()) - self.fileCount = 0 - self.endResetModel() - - -class Window(QtWidgets.QWidget): - def __init__(self, parent=None): - super(Window, self).__init__(parent) - - model = FileListModel(self) - model.setDirPath(QtCore.QLibraryInfo.location(QtCore.QLibraryInfo.PrefixPath)) - - label = QtWidgets.QLabel("Directory") - lineEdit = QtWidgets.QLineEdit() - label.setBuddy(lineEdit) - - view = QtWidgets.QListView() - view.setModel(model) - - self.logViewer = QtWidgets.QTextBrowser() - self.logViewer.setSizePolicy(QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)) - - lineEdit.textChanged.connect(model.setDirPath) - lineEdit.textChanged.connect(self.logViewer.clear) - model.numberPopulated.connect(self.updateLog) - - layout = QtWidgets.QGridLayout() - layout.addWidget(label, 0, 0) - layout.addWidget(lineEdit, 0, 1) - layout.addWidget(view, 1, 0, 1, 2) - layout.addWidget(self.logViewer, 2, 0, 1, 2) - - self.setLayout(layout) - self.setWindowTitle("Fetch More Example") - - def updateLog(self, number): - self.logViewer.append("%d items added." % number) - - -if __name__ == '__main__': - - import sys - - app = QtWidgets.QApplication(sys.argv) - - window = Window() - window.show() - - sys.exit(app.exec_()) |