2b75c156b6
Change-Id: I6441ff931dbd33b698d762e6f6784898f3f60fe7 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
247 lines
8.1 KiB
C++
247 lines
8.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets>
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#include "treemodelcompleter.h"
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#include "mainwindow.h"
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//! [0]
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MainWindow::MainWindow(QWidget *parent)
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: QMainWindow(parent), completer(0), lineEdit(0)
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{
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createMenu();
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completer = new TreeModelCompleter(this);
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completer->setModel(modelFromFile(":/resources/treemodel.txt"));
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completer->setSeparator(QLatin1String("."));
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QObject::connect(completer, SIGNAL(highlighted(QModelIndex)),
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this, SLOT(highlight(QModelIndex)));
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QWidget *centralWidget = new QWidget;
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QLabel *modelLabel = new QLabel;
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modelLabel->setText(tr("Tree Model<br>(Double click items to edit)"));
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QLabel *modeLabel = new QLabel;
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modeLabel->setText(tr("Completion Mode"));
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modeCombo = new QComboBox;
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modeCombo->addItem(tr("Inline"));
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modeCombo->addItem(tr("Filtered Popup"));
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modeCombo->addItem(tr("Unfiltered Popup"));
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modeCombo->setCurrentIndex(1);
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QLabel *caseLabel = new QLabel;
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caseLabel->setText(tr("Case Sensitivity"));
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caseCombo = new QComboBox;
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caseCombo->addItem(tr("Case Insensitive"));
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caseCombo->addItem(tr("Case Sensitive"));
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caseCombo->setCurrentIndex(0);
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//! [0]
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//! [1]
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QLabel *separatorLabel = new QLabel;
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separatorLabel->setText(tr("Tree Separator"));
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QLineEdit *separatorLineEdit = new QLineEdit;
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separatorLineEdit->setText(completer->separator());
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connect(separatorLineEdit, SIGNAL(textChanged(QString)),
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completer, SLOT(setSeparator(QString)));
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QCheckBox *wrapCheckBox = new QCheckBox;
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wrapCheckBox->setText(tr("Wrap around completions"));
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wrapCheckBox->setChecked(completer->wrapAround());
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connect(wrapCheckBox, SIGNAL(clicked(bool)), completer, SLOT(setWrapAround(bool)));
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contentsLabel = new QLabel;
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contentsLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
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connect(separatorLineEdit, SIGNAL(textChanged(QString)),
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this, SLOT(updateContentsLabel(QString)));
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treeView = new QTreeView;
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treeView->setModel(completer->model());
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treeView->header()->hide();
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treeView->expandAll();
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//! [1]
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//! [2]
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connect(modeCombo, SIGNAL(activated(int)), this, SLOT(changeMode(int)));
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connect(caseCombo, SIGNAL(activated(int)), this, SLOT(changeCase(int)));
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lineEdit = new QLineEdit;
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lineEdit->setCompleter(completer);
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//! [2]
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//! [3]
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QGridLayout *layout = new QGridLayout;
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layout->addWidget(modelLabel, 0, 0); layout->addWidget(treeView, 0, 1);
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layout->addWidget(modeLabel, 1, 0); layout->addWidget(modeCombo, 1, 1);
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layout->addWidget(caseLabel, 2, 0); layout->addWidget(caseCombo, 2, 1);
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layout->addWidget(separatorLabel, 3, 0); layout->addWidget(separatorLineEdit, 3, 1);
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layout->addWidget(wrapCheckBox, 4, 0);
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layout->addWidget(contentsLabel, 5, 0, 1, 2);
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layout->addWidget(lineEdit, 6, 0, 1, 2);
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centralWidget->setLayout(layout);
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setCentralWidget(centralWidget);
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changeCase(caseCombo->currentIndex());
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changeMode(modeCombo->currentIndex());
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setWindowTitle(tr("Tree Model Completer"));
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lineEdit->setFocus();
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}
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//! [3]
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//! [4]
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void MainWindow::createMenu()
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{
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QAction *exitAction = new QAction(tr("Exit"), this);
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QAction *aboutAct = new QAction(tr("About"), this);
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QAction *aboutQtAct = new QAction(tr("About Qt"), this);
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connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
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connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
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connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
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QMenu* fileMenu = menuBar()->addMenu(tr("File"));
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fileMenu->addAction(exitAction);
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QMenu* helpMenu = menuBar()->addMenu(tr("About"));
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helpMenu->addAction(aboutAct);
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helpMenu->addAction(aboutQtAct);
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}
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//! [4]
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//! [5]
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void MainWindow::changeMode(int index)
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{
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QCompleter::CompletionMode mode;
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if (index == 0)
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mode = QCompleter::InlineCompletion;
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else if (index == 1)
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mode = QCompleter::PopupCompletion;
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else
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mode = QCompleter::UnfilteredPopupCompletion;
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completer->setCompletionMode(mode);
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}
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//! [5]
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QAbstractItemModel *MainWindow::modelFromFile(const QString& fileName)
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{
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QFile file(fileName);
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if (!file.open(QFile::ReadOnly))
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return new QStringListModel(completer);
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#ifndef QT_NO_CURSOR
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QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
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#endif
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QStringList words;
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QStandardItemModel *model = new QStandardItemModel(completer);
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QVector<QStandardItem *> parents(10);
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parents[0] = model->invisibleRootItem();
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while (!file.atEnd()) {
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QString line = file.readLine();
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QString trimmedLine = line.trimmed();
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if (line.isEmpty() || trimmedLine.isEmpty())
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continue;
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QRegExp re("^\\s+");
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int nonws = re.indexIn(line);
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int level = 0;
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if (nonws == -1) {
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level = 0;
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} else {
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if (line.startsWith("\t")) {
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level = re.cap(0).length();
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} else {
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level = re.cap(0).length()/4;
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}
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}
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if (level+1 >= parents.size())
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parents.resize(parents.size()*2);
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QStandardItem *item = new QStandardItem;
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item->setText(trimmedLine);
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parents[level]->appendRow(item);
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parents[level+1] = item;
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}
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#ifndef QT_NO_CURSOR
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QApplication::restoreOverrideCursor();
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#endif
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return model;
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}
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void MainWindow::highlight(const QModelIndex &index)
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{
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QAbstractItemModel *completionModel = completer->completionModel();
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QAbstractProxyModel *proxy = qobject_cast<QAbstractProxyModel *>(completionModel);
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if (!proxy)
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return;
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QModelIndex sourceIndex = proxy->mapToSource(index);
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treeView->selectionModel()->select(sourceIndex, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
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treeView->scrollTo(index);
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}
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//! [6]
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void MainWindow::about()
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{
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QMessageBox::about(this, tr("About"), tr("This example demonstrates how "
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"to use a QCompleter with a custom tree model."));
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}
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//! [6]
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//! [7]
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void MainWindow::changeCase(int cs)
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{
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completer->setCaseSensitivity(cs ? Qt::CaseSensitive : Qt::CaseInsensitive);
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}
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//! [7]
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void MainWindow::updateContentsLabel(const QString& sep)
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{
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contentsLabel->setText(tr("Type path from model above with items at each level separated by a '%1'").arg(sep));
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}
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