Qt 5.9 | Qt Widgets | Pad Navigator Example | roundrectitem.cpp Example File

Qt 5.9.9 Reference Documentation

# roundrectitem.cpp Example File

graphicsview/padnavigator/roundrectitem.cpp

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      #include "roundrectitem.h"

      #include <QApplication>
      #include <QPainter>
      #include <QPalette>

      RoundRectItem::RoundRectItem(const QRectF &bounds, const QColor &color,
                                   QGraphicsItem *parent)
          : QGraphicsObject(parent), fillRect(false), bounds(bounds)
      {
          gradient.setStart(bounds.topLeft());
          gradient.setFinalStop(bounds.bottomRight());
          gradient.setColorAt(0, color);
          gradient.setColorAt(1, color.dark(200));
          setCacheMode(ItemCoordinateCache);
      }

      QPixmap RoundRectItem::pixmap() const
      {
          return pix;
      }
      void RoundRectItem::setPixmap(const QPixmap &pixmap)
      {
          pix = pixmap;
          update();
      }

      QRectF RoundRectItem::boundingRect() const
      {
          return bounds.adjusted(0, 0, 2, 2);
      }

      void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                                QWidget *widget)
      {
          Q_UNUSED(option);
          Q_UNUSED(widget);
          painter->setPen(Qt::NoPen);
          painter->setBrush(QColor(0, 0, 0, 64));
          painter->drawRoundRect(bounds.translated(2, 2));
          if (fillRect)
              painter->setBrush(QApplication::palette().brush(QPalette::Window));
          else
              painter->setBrush(gradient);
          painter->setPen(QPen(Qt::black, 1));
          painter->drawRoundRect(bounds);
          if (!pix.isNull()) {
              painter->scale(1.95, 1.95);
              painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);
          }
      }

      bool RoundRectItem::fill() const
      {
          return fillRect;
      }
      void RoundRectItem::setFill(bool fill)
      {
          fillRect = fill;
          update();
      }