findfiledialog.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the 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 Nokia Corporation and its Subsidiary(-ies) 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."
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtCore/QDir>
 #include <QtGui/QLayout>
 #include <QtGui/QComboBox>
 #include <QtGui/QTreeWidget>
 #include <QtGui/QLayout>
 #include <QtGui/QFileDialog>
 #include <QtGui/QDialogButtonBox>
 #include <QtGui/QToolButton>
 #include <QtGui/QPushButton>
 #include <QtGui/QLabel>

 #include "findfiledialog.h"
 #include "assistant.h"
 #include "textedit.h"

 FindFileDialog::FindFileDialog(TextEdit *editor, Assistant *assistant)
     : QDialog(editor)
 {
     currentAssistant = assistant;
     currentEditor = editor;

     createButtons();
     createComboBoxes();
     createFilesTree();
     createLabels();
     createLayout();

     directoryComboBox->addItem(QDir::toNativeSeparators(QDir::currentPath()));
     fileNameComboBox->addItem("*");
     findFiles();

     setWindowTitle(tr("Find File"));
 }

 void FindFileDialog::browse()
 {
     QString currentDirectory = directoryComboBox->currentText();
     QString newDirectory = QFileDialog::getExistingDirectory(this,
                                tr("Select Directory"), currentDirectory);
     if (!newDirectory.isEmpty()) {
         directoryComboBox->addItem(QDir::toNativeSeparators(newDirectory));
         directoryComboBox->setCurrentIndex(directoryComboBox->count() - 1);
         update();
     }
 }

 void FindFileDialog::help()
 {
     currentAssistant->showDocumentation("filedialog.html");
 }

 void FindFileDialog::openFile(QTreeWidgetItem *item)
 {
     if (!item) {
         item = foundFilesTree->currentItem();
         if (!item)
             return;
     }

     QString fileName = item->text(0);
     QString path = directoryComboBox->currentText() + QDir::separator();

     currentEditor->setContents(path + fileName);
     close();
 }

 void FindFileDialog::update()
 {
     findFiles();
     buttonBox->button(QDialogButtonBox::Open)->setEnabled(
             foundFilesTree->topLevelItemCount() > 0);
 }

 void FindFileDialog::findFiles()
 {
     QRegExp filePattern(fileNameComboBox->currentText() + "*");
     filePattern.setPatternSyntax(QRegExp::Wildcard);

     QDir directory(directoryComboBox->currentText());

     QStringList allFiles = directory.entryList(QDir::Files | QDir::NoSymLinks);
     QStringList matchingFiles;

     foreach (QString file, allFiles) {
         if (filePattern.exactMatch(file))
             matchingFiles << file;
     }
     showFiles(matchingFiles);
 }

 void FindFileDialog::showFiles(const QStringList &files)
 {
     foundFilesTree->clear();

     for (int i = 0; i < files.count(); ++i) {
         QTreeWidgetItem *item = new QTreeWidgetItem(foundFilesTree);
         item->setText(0, files[i]);
     }

     if (files.count() > 0)
         foundFilesTree->setCurrentItem(foundFilesTree->topLevelItem(0));
 }

 void FindFileDialog::createButtons()
 {
     browseButton = new QToolButton;
     browseButton->setText(tr("..."));
     connect(browseButton, SIGNAL(clicked()), this, SLOT(browse()));

     buttonBox = new QDialogButtonBox(QDialogButtonBox::Open
                                      | QDialogButtonBox::Cancel
                                      | QDialogButtonBox::Help);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(openFile()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
     connect(buttonBox, SIGNAL(helpRequested()), this, SLOT(help()));
 }

 void FindFileDialog::createComboBoxes()
 {
     directoryComboBox = new QComboBox;
     fileNameComboBox = new QComboBox;

     fileNameComboBox->setEditable(true);
     fileNameComboBox->setSizePolicy(QSizePolicy::Expanding,
                                     QSizePolicy::Preferred);

     directoryComboBox->setMinimumContentsLength(30);
     directoryComboBox->setSizeAdjustPolicy(
             QComboBox::AdjustToMinimumContentsLength);
     directoryComboBox->setSizePolicy(QSizePolicy::Expanding,
                                      QSizePolicy::Preferred);

     connect(fileNameComboBox, SIGNAL(editTextChanged(QString)),
             this, SLOT(update()));
     connect(directoryComboBox, SIGNAL(currentIndexChanged(QString)),
             this, SLOT(update()));
 }

 void FindFileDialog::createFilesTree()
 {
     foundFilesTree = new QTreeWidget;
     foundFilesTree->setColumnCount(1);
     foundFilesTree->setHeaderLabels(QStringList(tr("Matching Files")));
     foundFilesTree->setRootIsDecorated(false);
     foundFilesTree->setSelectionMode(QAbstractItemView::SingleSelection);

     connect(foundFilesTree, SIGNAL(itemActivated(QTreeWidgetItem*,int)),
             this, SLOT(openFile(QTreeWidgetItem*)));
 }

 void FindFileDialog::createLabels()
 {
     directoryLabel = new QLabel(tr("Search in:"));
     fileNameLabel = new QLabel(tr("File name (including wildcards):"));
 }

 void FindFileDialog::createLayout()
 {
     QHBoxLayout *fileLayout = new QHBoxLayout;
     fileLayout->addWidget(fileNameLabel);
     fileLayout->addWidget(fileNameComboBox);

     QHBoxLayout *directoryLayout = new QHBoxLayout;
     directoryLayout->addWidget(directoryLabel);
     directoryLayout->addWidget(directoryComboBox);
     directoryLayout->addWidget(browseButton);

     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addLayout(fileLayout);
     mainLayout->addLayout(directoryLayout);
     mainLayout->addWidget(foundFilesTree);
     mainLayout->addStretch();
     mainLayout->addWidget(buttonBox);
     setLayout(mainLayout);
 }