问固定大小的按网格布局的按钮，预定义行/科尔数

EN

// Suppose we read this info from a config file
int pbWidth = 150, pbHeight = 30;
// and this one from a datasource
QVector<QPoint> positions;
positions.push_back(QPoint(10, 10));
positions.push_back(QPoint(50, 50));
positions.push_back(QPoint(210, 30));

QTabWidget *tabWidget = new QTabWidget();
QScrollArea *scrollArea = new QScrollArea();
QWidget *scrollAreaWidget = new QWidget();

// We put a container widget inside the scroll area
scrollArea->setWidget(scrollAreaWidget);
// then we add the scroll area as the tab
tabWidget->addTab(scrollArea, tr("Tab 1"));

// Now let's put some push buttons on the widget
for (QVector<QPoint>::ConstIterator i = positions.cbegin();
     i != positions.cend(); i++)
{
  QString text = tr("Button at %1x%2").arg(i->x()).arg(i->y());
  // We have to pass the parent to the constructor
  // to place pb on the widget 
  QPushButton *pushButton = new QPushButton(text, scrollAreaWidget);

  // Here we set position and size
  pushButton->setGeometry(i->x(), i->y(), pbWidth, pbHeight);
}

// We have no layout on the widget, so don't forget to adjust size
scrollAreaWidget->adjustSize();