pdfscene.cpp (40)

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#include "pdfscene.h"
#include "boxtool.h"
#include <QGraphicsView>

#define MOUSE_CLICK_MAX_MOVEMENT 3

PDFScene::PDFScene() :
    QGraphicsScene(),
    boxTool(new BoxTool(this)),
    selectTool(new SelectTool(this)),
    tool(selectTool),
    visibleItems(ImageVisible)
{
    pdfView.setZValue(0);
    addItem(&pdfView);
}

void PDFScene::image(QImage pm)
{
    pdfView.setPixmap(QPixmap::fromImage(pm));
//  setSceneRect(0, 0, pm.width(), pm.height());
}

void PDFScene::pageText(QList<Poppler::TextBox*> boxen)
{
    // First delete existing text items
    foreach (QGraphicsItem* item, items())
        if (item->type() == QGraphicsTextItem::Type)
            removeItem(item);

    // Then add new ones, set position, visibility etc.
    int z = 1;  // Z coord: stack text items on top of the page image
    foreach(Poppler::TextBox* box, boxen)
    {
        QGraphicsTextItem* t = addText(box->text());
        t->setFlags(QGraphicsItem::ItemIsSelectable);
        QFont font = t->font();
        font.setPointSizeF(box->boundingBox().height() - 1.5);
        t->setFont(font);
        QRectF textBBox = t->boundingRect();
        textBBox.moveCenter(box->boundingBox().center());
        t->setPos(textBBox.topLeft());
        t->setZValue(z++);
        t->setVisible(visibleItems.testFlag(TextVisible));

//      QGraphicsRectItem* r = addRect(box->boundingBox());
//      r->setZValue(z++);
    }
}

void PDFScene::mouseMoveEvent ( QGraphicsSceneMouseEvent * ev)
{
    if (tool && ev->buttons() & Qt::LeftButton)
        tool->mouseMoveEvent(ev);
//  else
//      QGraphicsScene::mouseMoveEvent(ev);
    emit cursorPos(ev->scenePos());
}

void PDFScene::mousePressEvent ( QGraphicsSceneMouseEvent * ev)
{
    if (tool && ev->buttons() & Qt::LeftButton)
        tool->mousePressEvent(ev);
}

void PDFScene::mouseReleaseEvent ( QGraphicsSceneMouseEvent * ev)
{
    if (tool && ev->button() == Qt::LeftButton)
    {
        if ( abs(ev->buttonDownScreenPos(Qt::LeftButton).x() - ev->screenPos().x()) < MOUSE_CLICK_MAX_MOVEMENT &&
             abs(ev->buttonDownScreenPos(Qt::LeftButton).y() - ev->screenPos().y()) < MOUSE_CLICK_MAX_MOVEMENT )
            tool->mouseLeftClickEvent(ev);
        tool->mouseReleaseEvent(ev);
    }
    update();
}

QImage PDFScene::image()
{
    return pdfView.pixmap().toImage();
}

void PDFScene::updateVisibilities()
{
    foreach (QGraphicsItem* item, items())
    {
//      if (item->type() > QGraphicsItem::UserType)
//      {
//      }
//      else
            switch (item->type())
            {
            case QGraphicsTextItem::Type:
                item->setVisible(visibleItems.testFlag(TextVisible));
                break;
            case QGraphicsPixmapItem::Type:
                item->setVisible(visibleItems.testFlag(ImageVisible));
                break;
            }
    }
}

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