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/*

 * This programm takes a *.ui file and an output dir as argument in order to

 * create a screenshot of the widget defined in the ui file.

 *

 * The screenshot is saved in the output dir (default current dir), ".png" is

 * appended to the ui file name.

 */

#include <QApplication>

#include <QWidget>

#include <QFile>

#include <QDebug>

#include <QDir>

#include <iostream>

using namespace std;

#ifdef Q_WS_QWS

// we don't compile designer on embedded...

int main(int argc, char **argv)

{

    return 0;

}

#else

#include <QUiLoader>

/*

 * Take the path of an ui file and return appropriate QWidget.

 */

QWidget* getWidgetFromUiFile(const QString& fileNameUiFile)

{

    qDebug() << "\t\t\t...loading ui file" << fileNameUiFile;

    QUiLoader loader;

    QFile uiFile(fileNameUiFile);

    if (!uiFile.open(QIODevice::ReadOnly | QIODevice::Text)) {

		qDebug("\t\tError: QFile.open() failed.");

		exit(EXIT_FAILURE);

	}

    QFileInfo fileInfo(fileNameUiFile);

    QDir::setCurrent(fileInfo.absolutePath()); //for the stylesheet to find their images

    QWidget *ui = loader.load(&uiFile);

	if (!ui) {

		qDebug("\t\tError: Quilodader.load() returned NULL pointer.");

		exit(EXIT_FAILURE);

	}

    uiFile.close();

    return ui;

}

/*

 * Takes the actual screenshot.

 *

 * Hint: provide filename without extension, ".png" will be added

 */

void makeScreenshot(QWidget* widget, const QString& fileName, const QString& pathOutputDir)

{

    QFileInfo fileInfo(fileName);

    QString realFileName = fileInfo.completeBaseName() + "." + fileInfo.suffix() + ".png";

    QString realPath = pathOutputDir + "/" + realFileName;

    //QString realFileName = fileName + ".png";

    qDebug() << "\t\t\t...Taking screenshot" << fileInfo.absoluteFilePath();

    //widget->show();

    qApp->processEvents();

    QImage originalPixmap(widget->size(),QImage::Format_ARGB32);

    widget->render(&originalPixmap);

	if ( originalPixmap.isNull() ) {

		qDebug("\t\tError: QPixmap::grabWidget() returned a NULL QPixmap.");

		exit(EXIT_FAILURE);

	}

    //QString fileName = QDir::currentPath() + "/secondwidget." + format;

    if ( !originalPixmap.save(realPath, "PNG") ) {

		qDebug("\t\tError: QPixmap.save() failed.");

		exit(EXIT_FAILURE);

	}

    qDebug() << "\t\t\t...Screenshot saved in" << realPath;

    widget->close();

}

/*

 * Call this if you just want to pass the ui file name and the output dir.

 */

void createScreenshotFromUiFile(const QString& fileNameUiFile, const QString pathOutputDir)

{

    qDebug() << "\t\tCreating screenshot from widget defined in" << fileNameUiFile;

    QWidget* w = getWidgetFromUiFile(fileNameUiFile);

    makeScreenshot(w, fileNameUiFile, pathOutputDir);

}

/*

 * Start here.

 */

int main(int argc, char **argv)

{

    QApplication app(argc, argv);

    // check for necessary arguments

    if (argc == 1) {

        cout << "Syntax: " << argv[0] << " <path to *.ui file> [output directory]" << endl;

        cout << "" << endl;

        cout << "Takes a *.ui file and an output dir as argument in order to" << endl;

        cout << "create a screenshot of the widget defined in the ui file." << endl;

        cout << "" << endl;

        cout << "The screenshot is saved in the output dir (default current dir)," << endl;

        cout << "'.png' is appended to the ui file name." << endl;

        exit(EXIT_FAILURE);

    }

    // check for *.ui

    QString fileName = app.arguments().value(1);

    if ( !fileName.endsWith(".ui") ) {

        qDebug() << fileName + " is not a *.ui file.";

        exit(EXIT_FAILURE);

    }

    // does the file exist?

    QFile uiFile(fileName);

    if ( !uiFile.exists() ) {

        qDebug() << fileName + " does not exist.";

        exit(EXIT_FAILURE);

    }

    // check output directory

    QString pathOutputDir = QDir::currentPath();

    if (argc >= 3 ) {

        QDir outputDir = app.arguments().value(2);

        if ( outputDir.exists() ) {

            pathOutputDir = outputDir.absolutePath();

        } else {

            qDebug() << outputDir.absolutePath() + " does not exist or is not a directory.";

            exit(EXIT_FAILURE);

        }

    }

    // take the screenshot

    createScreenshotFromUiFile(fileName, pathOutputDir);

    app.quit();

    return 0;

}

#endif