objects.cpp Example File

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  #include "objects.h"
  #include <QLayout>
  #include <QPainter>

  /* Implementation of QParentWidget */
  QParentWidget::QParentWidget(QWidget *parent)
  : QWidget(parent)
  {
      vbox = new QVBoxLayout(this);
  }

  void QParentWidget::createSubWidget(const QString &name)
  {
      QSubWidget *sw = new QSubWidget(this, name);
      vbox->addWidget(sw);
      sw->setLabel(name);
      sw->show();
  }

  QSubWidget *QParentWidget::subWidget(const QString &name)
  {
      return findChild<QSubWidget*>(name);
  }

  QSize QParentWidget::sizeHint() const
  {
      return QWidget::sizeHint().expandedTo(QSize(100, 100));
  }

  /* Implementation of QSubWidget */
  QSubWidget::QSubWidget(QWidget *parent, const QString &name)
  : QWidget(parent)
  {
      setObjectName(name);
  }

  void QSubWidget::setLabel(const QString &text)
  {
      lbl = text;
      setObjectName(text);
      update();
  }

  QString QSubWidget::label() const
  {
      return lbl;
  }

  QSize QSubWidget::sizeHint() const
  {
      QFontMetrics fm(font());
      return QSize(fm.width(lbl), fm.height());
  }

  void QSubWidget::paintEvent(QPaintEvent *)
  {
      QPainter painter(this);
      painter.setPen(palette().text().color());
      painter.drawText(rect(), Qt::AlignCenter, lbl);
  }