Export widget to bmp

[Lodhart]

Hi, i have a widget and i paint some items like line, picture, rect, ...

class TCanvas : public QWidget
{
  Q_OBJECT
 
  protected:
     void paintEvent(QPaintEvent *event);
}

class TCanvas : public QWidget
{
  Q_OBJECT

  protected:
     void paintEvent(QPaintEvent *event);
}

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i use painter to paint and i do not know how i can save what i drew.. somethink like :
painter->saveToFile.. or widget->savetofile...
please can you help me...