Qt 5.6 | Qt Quick | Scene Graph - Painted Item | textballoon.cpp Example File

Qt 5.6.3 Reference Documentation

# textballoon.cpp Example File

customitems/painteditem/textballoon.cpp

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      #include "textballoon.h"

      TextBalloon::TextBalloon(QQuickItem *parent)
          : QQuickPaintedItem(parent)
          , rightAligned(false)
      {
      }

      void TextBalloon::paint(QPainter *painter)
      {
          QBrush brush(QColor("#007430"));

          painter->setBrush(brush);
          painter->setPen(Qt::NoPen);
          painter->setRenderHint(QPainter::Antialiasing);

          painter->drawRoundedRect(0, 0, boundingRect().width(), boundingRect().height() - 10, 10, 10);

          if (rightAligned)
          {
              const QPointF points[3] = {
                  QPointF(boundingRect().width() - 10.0, boundingRect().height() - 10.0),
                  QPointF(boundingRect().width() - 20.0, boundingRect().height()),
                  QPointF(boundingRect().width() - 30.0, boundingRect().height() - 10.0),
              };
              painter->drawConvexPolygon(points, 3);
          }
          else
          {
              const QPointF points[3] = {
                  QPointF(10.0, boundingRect().height() - 10.0),
                  QPointF(20.0, boundingRect().height()),
                  QPointF(30.0, boundingRect().height() - 10.0),
              };
              painter->drawConvexPolygon(points, 3);
          }
      }

      bool TextBalloon::isRightAligned()
      {
          return this->rightAligned;
      }

      void TextBalloon::setRightAligned(bool rightAligned)
      {
          this->rightAligned = rightAligned;
      }