Paint XP radio button to pixmap

[Ben.Hines]

Hi,

I'm trying to grab the pixmap for a radio button from the QWindowsXPStyle. I thought that using the style to paint a radio button into a pixmap would work, but I keep getting an empty white square. Any ideas what I'm doing wrong? Here's a code snippet:

QWindowsXPStyle oBaseStyle;
  QRadioButton oRadioButton;
  QStyleOption oRadioStyleOption;
  QSize oNormalRadioSize;
  oRadioButton.setStyle(&oBaseStyle);
  oRadioButton.ensurePolished();
  oRadioStyleOption.initFrom(&oRadioButton);
  oNormalRadioSize.setWidth(QWindowsXPStyle::pixelMetric(PM_ExclusiveIndicatorWidth, &oRadioStyleOption, &oRadioButton));
  oNormalRadioSize.setHeight(QWindowsXPStyle::pixelMetric(PM_ExclusiveIndicatorHeight, &oRadioStyleOption, &oRadioButton));
 
 
  // Initialize a painter and pixmap for drawing the radio buttons
  // at their normal sizes.
  QPixmap oRadioPixmap(oNormalRadioSize);
  QPainter oRadioPainter;
  oRadioPainter.setBackgroundMode(Qt::TransparentMode);
 
  // Draw the radio button into the pixmap.
  oRadioPainter.begin(&oRadioPixmap);
  oRadioButton.setChecked(true);
  oRadioButton.setEnabled(true);
  QWindowsXPStyle::drawPrimitive(PE_IndicatorRadioButton, &oRadioStyleOption, &oRadioPainter, &oRadioButton);
  oRadioPainter.end();

QWindowsXPStyle oBaseStyle;
  QRadioButton oRadioButton;
  QStyleOption oRadioStyleOption;
  QSize oNormalRadioSize;
  oRadioButton.setStyle(&oBaseStyle);
  oRadioButton.ensurePolished();
  oRadioStyleOption.initFrom(&oRadioButton);
  oNormalRadioSize.setWidth(QWindowsXPStyle::pixelMetric(PM_ExclusiveIndicatorWidth, &oRadioStyleOption, &oRadioButton));
  oNormalRadioSize.setHeight(QWindowsXPStyle::pixelMetric(PM_ExclusiveIndicatorHeight, &oRadioStyleOption, &oRadioButton));


  // Initialize a painter and pixmap for drawing the radio buttons
  // at their normal sizes.
  QPixmap oRadioPixmap(oNormalRadioSize);
  QPainter oRadioPainter;
  oRadioPainter.setBackgroundMode(Qt::TransparentMode);

  // Draw the radio button into the pixmap.
  oRadioPainter.begin(&oRadioPixmap);
  oRadioButton.setChecked(true);
  oRadioButton.setEnabled(true);
  QWindowsXPStyle::drawPrimitive(PE_IndicatorRadioButton, &oRadioStyleOption, &oRadioPainter, &oRadioButton);
  oRadioPainter.end();

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[jpn]

QStyleOption oRadioStyleOption.rect is not initialized correctly because the radio button is not visible and therefore does not supply a valid geometry for the style option.

[jpn]

Try adding this somewhere before calling drawPrimitive():

oRadioStyleOption.rect = QRect(QPoint(0,0), oNormalRadioSize);

oRadioStyleOption.rect = QRect(QPoint(0,0), oNormalRadioSize);

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