ajapreviewwidget.cpp

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/* SPDX-License-Identifier: MIT */
#include "ajapreviewwidget.h"
 
/***************************************************************************************/
 
 
AJAPreviewWidget::AJAPreviewWidget (QWidget *parent)
    :   QFrame (parent)
{
    qRegisterMetaType<QImage>("QImage");
    qRegisterMetaType<ROIRectList>("ROIRectList");
    setAcceptDrops(true);
    #if defined (INCLUDE_AJACC)
        for (unsigned ndx (0);  ndx < 15;  ndx++)
            _captionStrings [ndx] = QString (32, QChar (32));
    #endif  //  defined (INCLUDE_AJACC)
    _clear = false;
    _render = false;
}
 
void AJAPreviewWidget::paintEvent (QPaintEvent * /* event */)
{
    QPainter painter (this);
 
    const int offsetX   (_pixmap.width()  < width()  ? (width()  - _pixmap.width())  / 2 : 0);
    const int offsetY   (_pixmap.height() < height() ? (height() - _pixmap.height()) / 2 : 0);
 
    painter.drawPixmap (offsetX, offsetY, _pixmap);
    for (int i (0);  i < _roiList.size();  i++)
    {
        const ROIStruct & roiRectInfo   (_roiList [i]);
        //qDebug() << "ROI:" << roiRectInfo.roiRect.left() << roiRectInfo.roiRect.right() << roiRectInfo.roiRect.top() << roiRectInfo.roiRect.bottom();
        const double    hScale  (double (_pixmap.width()) / double (_unscaledImageSize.width()));
        const double    vScale  (double (_pixmap.height()) / double (_unscaledImageSize.height()));
        //qDebug() << "hScale=" << hScale << "vScale=" << vScale;
        if (roiRectInfo.display)
        {
            QPen currentPen (roiRectInfo.roiRectColor);
            currentPen.setWidth (4);
            painter.setPen (currentPen);
            QRectF currentRect; //(roiRectInfo.roiRect);
            currentRect.setLeft   (double(offsetX)  +  roiRectInfo.roiRect.left()   * hScale);
            currentRect.setRight  (double(offsetX)  +  roiRectInfo.roiRect.right()  * hScale);
            currentRect.setTop    (double(offsetY)  +  roiRectInfo.roiRect.top()    * vScale);
            currentRect.setBottom (double(offsetY)  +  roiRectInfo.roiRect.bottom() * vScale);
            //qDebug() << "ROI2:" << currentRect.left() << currentRect.right() << currentRect.top() << currentRect.bottom();
            painter.drawRect (currentRect);
        }
    }
 
    //  Draw the status message using a dark gray outline and white interior, for better visibility...
    QFont f ("Lucida");
    f.setPointSize(32);
    f.setStyleStrategy(QFont::PreferOutline);
    f.setLetterSpacing(QFont::PercentageSpacing, 110.0);
    f.setWeight(QFont::Bold);
    const QBrush whiteBrush(Qt::white);
    const QPen blackPen(QBrush(Qt::darkGray), 2.0);
    QPainterPath pp;
    pp.addText(QPointF(30.0, 40.0), f, _statusString);
    painter.fillPath(pp, whiteBrush);
    painter.strokePath(pp, blackPen);
//  setFont(f);
//  painter.setPen (qRgba (255, 255, 255, 255));
//  painter.drawText (30, 40, _statusString);
 
    #if defined (INCLUDE_AJACC)
        QFont           captionFont ("Courier");
        captionFont.setPointSize (24);
        QFontMetrics    metrics (captionFont);
        const int       offX    (width()  / 2  -  32 * metrics.averageCharWidth() / 2);
        const int       offY    (height() / 2  -  15 * (metrics.height() + metrics.leading()) / 2);
        setFont (captionFont);
        painter.setPen (qRgba (255, 255, 255, 0));
        for (unsigned ndx (0);  ndx < 15;  ndx++)
            painter.drawText (offX, offY + ndx * (metrics.height() + metrics.leading()), _captionStrings [ndx]);
    #endif  //  defined (INCLUDE_AJACC)
 
    _render = false;
}   //  paintEvent
 
 
void AJAPreviewWidget::updateFrame (const QImage &image, bool clear)
{
//  qDebug() << "Update Frame";
    _unscaledImageSize.setHeight(image.height());
    _unscaledImageSize.setWidth(image.width());
    _image = image;
    _clear = clear;
 
    if (!_render)
    {
        _render = true;
        QMetaObject::invokeMethod(this, "renderFrame", Qt::QueuedConnection);
    }
}
 
void AJAPreviewWidget::updateFrameWithStatus (const QImage &image, const QString& statusString, bool clear)
{
//    qDebug() << "Update Frame With Status";
 
    _statusString = statusString;
    _unscaledImageSize.setHeight(image.height());
    _unscaledImageSize.setWidth(image.width());
    _image = image;
    _clear = clear;
 
    if (!_render)
    {
        _render = true;
        QMetaObject::invokeMethod(this, "renderFrame", Qt::QueuedConnection);
    }
}
 
void AJAPreviewWidget::updateFrameWithROI (const QImage & image, ROIRectList roiList, bool clear)
{
    _roiList = roiList;
    _unscaledImageSize.setHeight (image.height());
    _unscaledImageSize.setWidth (image.width());
    _image = image;
    _clear = clear;
 
    if (!_render)
    {
        _render = true;
        QMetaObject::invokeMethod(this, "renderFrame", Qt::QueuedConnection);
    }
}
 
void AJAPreviewWidget::updateROI (ROIRectList roiList)
{
    _roiList = roiList;
}
 
void AJAPreviewWidget::updateStatusString(const QString statusString)
{
    _statusString = statusString;
}
 
#if defined (INCLUDE_AJACC)
    void AJAPreviewWidget::updateCaptionScreen (const ushort * pInScreen)
    {
        const ushort *  pCell   (pInScreen);
        for (UWord row (NTV2_CC608_MinRow);  row <= NTV2_CC608_MaxRow;  row++)
            for (UWord col (NTV2_CC608_MinCol);  col <= NTV2_CC608_MaxCol;  col++)
                _captionStrings [row-1].replace (col-1, 1, QChar (*pCell++));
    }
#endif  //  defined (INCLUDE_AJACC)
 
void AJAPreviewWidget::renderFrame ()
{
//  qDebug() << "Render Frame";
    if (_image.width() > this->width())
        _pixmap = QPixmap::fromImage(_image.scaledToWidth(this->width(), Qt::SmoothTransformation), Qt::ImageConversionFlags());
    else if (_image.height() > this->height())
        _pixmap = QPixmap::fromImage(_image.scaledToHeight(this->height(), Qt::SmoothTransformation), Qt::ImageConversionFlags());
    else
        _pixmap = QPixmap::fromImage(_image, Qt::ImageConversionFlags());
 
    setAttribute(Qt::WA_OpaquePaintEvent, _clear ? false : true);
    repaint();
}
 
 
void AJAPreviewWidget::dragEnterEvent( QDragEnterEvent *ev )
{
    if (ev->mimeData()->hasFormat("text/uri-list"))
        ev->acceptProposedAction();
    else
        ev->setAccepted( false );
}
 
 
void AJAPreviewWidget::dropEvent (QDropEvent * ev)
{
    QList<QUrl> urls = ev->mimeData()->urls();
    if (urls.isEmpty())
        return;
 
    QString fileName = urls.first().toLocalFile();
    if (fileName.isEmpty())
        return;
 
    QImage imageFile(fileName);
    if ( !imageFile.isNull())
    {
        updateFrame(imageFile,true);
        return;
    }
    emit droppedFile(fileName);
}