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* Copyright (C) 2013 - 2015 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#include "pathedit_p.h"
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#include <QStringListModel>
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#include <QStringBuilder>
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void PathEditJob::runJob() {
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GFileEnumerator* enu = g_file_enumerate_children(dirName,
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// G_FILE_ATTRIBUTE_STANDARD_NAME","
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G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME","
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G_FILE_ATTRIBUTE_STANDARD_TYPE,
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G_FILE_QUERY_INFO_NONE, cancellable,
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while(!g_cancellable_is_cancelled(cancellable)) {
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GFileInfo* inf = g_file_enumerator_next_file(enu, cancellable, &err);
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GFileType type = g_file_info_get_file_type(inf);
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if(type == G_FILE_TYPE_DIRECTORY) {
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const char* name = g_file_info_get_display_name(inf);
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// FIXME: encoding conversion here?
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subDirs.append(QString::fromUtf8(name));
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g_file_enumerator_close(enu, cancellable, NULL);
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// finished! let's update the UI in the main thread
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PathEdit::PathEdit(QWidget* parent):
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model_(new QStringListModel()),
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completer_(new QCompleter()) {
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setCompleter(completer_);
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completer_->setModel(model_);
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connect(this, &PathEdit::textChanged, this, &PathEdit::onTextChanged);
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PathEdit::~PathEdit() {
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g_cancellable_cancel(cancellable_);
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g_object_unref(cancellable_);
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void PathEdit::focusInEvent(QFocusEvent* e) {
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QLineEdit::focusInEvent(e);
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// build the completion list only when we have the keyboard focus
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reloadCompleter(true);
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void PathEdit::focusOutEvent(QFocusEvent* e) {
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QLineEdit::focusOutEvent(e);
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// free the completion list since we don't need it anymore
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void PathEdit::onTextChanged(const QString& text) {
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int pos = text.lastIndexOf('/');
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QString newPrefix = text.left(pos);
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if(currentPrefix_ != newPrefix) {
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currentPrefix_ = newPrefix;
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// only build the completion list if we have the keyboard focus
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// if we don't have the focus now, then we'll rebuild the completion list
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// when focusInEvent happens. this avoid unnecessary dir loading.
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reloadCompleter(false);
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void PathEdit::reloadCompleter(bool triggeredByFocusInEvent) {
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// parent dir has been changed, reload dir list
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// if(currentPrefix_[0] == "~") { // special case for home dir
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// cancel running dir-listing jobs, if there's any
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g_cancellable_cancel(cancellable_);
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g_object_unref(cancellable_);
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// create a new job to do dir listing
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PathEditJob* job = new PathEditJob();
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job->triggeredByFocusInEvent = triggeredByFocusInEvent;
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// need to use fm_file_new_for_commandline_arg() rather than g_file_new_for_commandline_arg().
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// otherwise, our own vfs, such as menu://, won't be loaded.
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job->dirName = fm_file_new_for_commandline_arg(currentPrefix_.toLocal8Bit().constData());
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// qDebug("load: %s", g_file_get_uri(data->dirName));
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cancellable_ = g_cancellable_new();
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job->cancellable = (GCancellable*)g_object_ref(cancellable_);
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// launch a new worker thread to handle the job
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QThread* thread = new QThread();
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job->moveToThread(thread);
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connect(thread, &QThread::started, job, &PathEditJob::runJob);
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connect(thread, &QThread::finished, thread, &QObject::deleteLater);
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connect(thread, &QThread::finished, job, &QObject::deleteLater);
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connect(job, &PathEditJob::finished, this, &PathEdit::onJobFinished);
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thread->start(QThread::LowPriority);
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void PathEdit::freeCompleter() {
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g_cancellable_cancel(cancellable_);
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g_object_unref(cancellable_);
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model_->setStringList(QStringList());
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// This slot is called from main thread so it's safe to access the GUI
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void PathEdit::onJobFinished() {
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PathEditJob* data = static_cast<PathEditJob*>(sender());
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if(!g_cancellable_is_cancelled(data->cancellable)) {
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// update the completer only if the job is not cancelled
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QStringList::iterator it;
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for(it = data->subDirs.begin(); it != data->subDirs.end(); ++it) {
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// qDebug("%s", it->toUtf8().constData());
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*it = (currentPrefix_ % *it);
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model_->setStringList(data->subDirs);
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// trigger completion manually
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if(hasFocus() && !data->triggeredByFocusInEvent)
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completer_->complete();
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model_->setStringList(QStringList());
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g_object_unref(cancellable_);
added
removed
src/pathedit.cpp
