C++ KPMetadata::getImageDateTime方法代码示例

bool ClockPhotoDialog::setImage(const KUrl& imageFile)
{
    bool success = false;

    if (d->imagePreview->load(imageFile.toLocalFile()))
    {
        // Try to read the datetime data.
        KPMetadata meta;

        if (meta.load(imageFile.toLocalFile()))
        {
            d->photoDateTime = meta.getImageDateTime();

            if (d->photoDateTime.isValid())
            {
                // Set the datetime widget to the photo datetime.
                d->calendar->setDateTime(d->photoDateTime);
                d->calendar->setEnabled(true);
                success = true;
            }
            else
            {
                // If datetime information couldn't be loaded, display a
                // warning and disable the datetime widget.
                QString warning = i18n("<font color=\"red\"><b>Could not "
                                       "obtain<br>date and time information<br>"
                                       "from image %1.</b></font>",
                                       imageFile.fileName());
                d->imagePreview->setText(warning);
            }
        }
    }
    else
    {
        // If the image couldn't be loaded, display a warning, disable all the
        // GUI elements and load an empty photo into d->image.
        QString warning = i18n("<font color=\"red\"><b>Could not load<br>"
                               "image %1.</b></font>",
                               imageFile.fileName());
        d->imagePreview->setText(warning);
    }

    // Disable all the GUI elements if loading failed.
    d->calendar->setEnabled(success);

    return success;
}

//.........这里部分代码省略.........
            addKmlTextElement(kmlGeometry, "coordinates", QString("%1,%2 ")
                .arg(lng, 0, 'f', 8)
                .arg(lat, 0, 'f', 8));
        }

        if (m_altitudeMode == 2 )
        {
            addKmlTextElement(kmlGeometry, "altitudeMode", "absolute");
        }
        else if (m_altitudeMode == 1 )
        {
            addKmlTextElement(kmlGeometry, "altitudeMode", "relativeToGround");
        }
        else
        {
            addKmlTextElement(kmlGeometry, "altitudeMode", "clampToGround");
        }

        addKmlTextElement(kmlGeometry, "extrude", "1");

        // we try to load exif value if any otherwise, try the application db
        /** we need to take the DateTimeOriginal
          * if we refer to http://www.exif.org/Exif2-2.PDF
          * (standard)DateTime: is The date and time of image creation. In this standard it is the date and time the file was changed
          * DateTimeOriginal: The date and time when the original image data was generated.
          *                   For a DSC the date and time the picture was taken are recorded.
          * DateTimeDigitized: The date and time when the image was stored as digital data.
          * So for:
          * - a DSC: the right time is the DateTimeDigitized which is also DateTimeOriginal
          *          if the picture has been modified the (standard)DateTime should change.
          * - a scanned picture, the right time is the DateTimeOriginal which should also be the DateTime
          *          the (standard)DateTime should be the same except if the picture is modified
          * - a panorama created from several pictures, the right time is the DateTimeOriginal (average of DateTimeOriginal actually)
          *          The (standard)DateTime is the creation date of the panorama.
          * it's seems the time to take into acccount is the DateTimeOriginal.
          * but the KPMetadata::getImageDateTime() return the (standard)DateTime first
          * KPMetadata seems to take Original dateTime first so it shoul be alright now.
          */
        QDateTime datetime = meta.getImageDateTime();

        if (datetime.isValid())
        {
            QDomElement kmlTimeStamp = addKmlElement(kmlPlacemark, "TimeStamp");
            addKmlTextElement(kmlTimeStamp, "when", datetime.toString("yyyy-MM-ddThh:mm:ssZ"));
        }
        else if (m_interface->hasFeature(ImagesHasTime))
        {
            QDomElement kmlTimeStamp = addKmlElement(kmlPlacemark, "TimeStamp");
            addKmlTextElement(kmlTimeStamp, "when", (info.date()).toString("yyyy-MM-ddThh:mm:ssZ"));
        }

        QString my_description;

        if (m_optimize_googlemap)
        {
            my_description = "<img src=\"" + m_UrlDestDir + m_imageDir + fullFileName + "\">";
        }
        else
        {
            my_description = "<img src=\"" + m_imageDir + fullFileName + "\">";
        }

        if ( m_interface->hasFeature( ImagesHasComments ) )
        {
            my_description += "<br/>" + info.description() ;
        }

        addKmlTextElement(kmlPlacemark, "description", my_description);
        logInfo(i18n("Creation of placemark '%1'", fullFileName));

        // Save icon
        QString iconFileName = "thumb_" + baseFileName + '.' + imageFormat.toLower();
        QString destPath     = m_tempDestDir + m_imageDir + iconFileName;

        if (!icon.save(destPath, imageFormat.toAscii(), 85))
        {
            logWarning(i18n("Could not save icon for image '%1' to '%2'",path,destPath));
        }
        else
        {
            //logInfo(i18n("Creation of icon '%1'").arg(iconFileName));
            // style et icon
            QDomElement kmlStyle     = addKmlElement(kmlPlacemark, "Style");
            QDomElement kmlIconStyle = addKmlElement(kmlStyle,     "IconStyle");
            QDomElement kmlIcon      = addKmlElement(kmlIconStyle, "Icon");

            if (m_optimize_googlemap)
            {
                addKmlTextElement(kmlIcon, "href", m_UrlDestDir + m_imageDir + iconFileName);
            }
            else
            {
                addKmlTextElement(kmlIcon, "href", m_imageDir + iconFileName);
            }

            QDomElement kmlBallonStyle = addKmlElement(kmlStyle, "BalloonStyle");
            addKmlTextElement(kmlBallonStyle, "text", "$[description]");
        }
    }
}