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//------------------------------------------------------------------------
// Copyright 2008-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
//
// This file is part of the ZBar Bar Code Reader.
//
// The ZBar Bar Code Reader is free software; you can redistribute it
// and/or modify it under the terms of the GNU Lesser Public License as
// published by the Free Software Foundation; either version 2.1 of
// the License, or (at your option) any later version.
//
// The ZBar Bar Code Reader is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser Public License for more details.
//
// You should have received a copy of the GNU Lesser Public License
// along with the ZBar Bar Code Reader; if not, write to the Free
// Software Foundation, Inc., 51 Franklin St, Fifth Floor,
// Boston, MA 02110-1301 USA
//
// http://sourceforge.net/projects/zbar
//------------------------------------------------------------------------
#include <QApplication>
#include <QWidget>
#include <QLayout>
#include <QComboBox>
#include <QPushButton>
#include <QTextEdit>
#include <QFileDialog>
#include <QImage>
#include <zbar/QZBar.h>
#define TEST_IMAGE_FORMATS \
"Image Files (*.png *.jpg *.jpeg *.bmp *.gif *.ppm *.pgm *.pbm *.tiff *.xpm *.xbm)"
extern "C" {
int scan_video(void *add_device,
void *userdata,
const char *default_device);
}
class TestQZBar : public QWidget
{
Q_OBJECT
protected:
static void add_device (QComboBox *list,
const char *device)
{
list->addItem(QString(device));
}
public:
TestQZBar (const char *default_device)
{
// drop-down list of video devices
QComboBox *videoList = new QComboBox;
// toggle button to disable/enable video
QPushButton *statusButton = new QPushButton;
QStyle *style = QApplication::style();
QIcon statusIcon = style->standardIcon(QStyle::SP_DialogNoButton);
QIcon yesIcon = style->standardIcon(QStyle::SP_DialogYesButton);
statusIcon.addPixmap(yesIcon.pixmap(QSize(128, 128),
QIcon::Normal, QIcon::On),
QIcon::Normal, QIcon::On);
statusButton->setIcon(statusIcon);
statusButton->setText("&Enable");
statusButton->setCheckable(true);
statusButton->setEnabled(false);
// command button to open image files for scanning
QPushButton *openButton = new QPushButton("&Open");
QIcon openIcon = style->standardIcon(QStyle::SP_DialogOpenButton);
openButton->setIcon(openIcon);
// collect video list and buttons horizontally
QHBoxLayout *hbox = new QHBoxLayout;
hbox->addWidget(videoList, 5);
hbox->addWidget(statusButton, 1);
hbox->addWidget(openButton, 1);
// video barcode scanner
zbar = new zbar::QZBar;
zbar->setAcceptDrops(true);
// text box for results
QTextEdit *results = new QTextEdit;
results->setReadOnly(true);
QVBoxLayout *vbox = new QVBoxLayout;
vbox->addLayout(hbox);
vbox->addWidget(zbar);
vbox->addWidget(results);
setLayout(vbox);
videoList->addItem("");
int active = scan_video((void*)add_device, videoList, default_device);
// directly connect combo box change signal to scanner video open
connect(videoList, SIGNAL(currentIndexChanged(const QString&)),
zbar, SLOT(setVideoDevice(const QString&)));
// directly connect status button state to video enabled state
connect(statusButton, SIGNAL(toggled(bool)),
zbar, SLOT(setVideoEnabled(bool)));
// also update status button state when video is opened/closed
connect(zbar, SIGNAL(videoOpened(bool)),
statusButton, SLOT(setEnabled(bool)));
// enable/disable status button when video is opened/closed
connect(zbar, SIGNAL(videoOpened(bool)),
statusButton, SLOT(setChecked(bool)));
// prompt for image file to scan when openButton is clicked
connect(openButton, SIGNAL(clicked()), SLOT(openImage()));
// directly connect video scanner decode result to display in text box
connect(zbar, SIGNAL(decodedText(const QString&)),
results, SLOT(append(const QString&)));
if(active >= 0)
videoList->setCurrentIndex(active);
}
public Q_SLOTS:
void openImage ()
{
file = QFileDialog::getOpenFileName(this, "Open Image", file,
TEST_IMAGE_FORMATS);
if(!file.isEmpty())
zbar->scanImage(QImage(file));
}
private:
QString file;
zbar::QZBar *zbar;
};
#include "moc_test_qt.h"
int main (int argc, char *argv[])
{
QApplication app(argc, argv);
const char *dev = NULL;
if(argc > 1)
dev = argv[1];
TestQZBar window(dev);
window.show();
return(app.exec());
}
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