4 files changed, 13 insertions, 0 deletions
diff --git a/src/gui/image/qimagereader.cpp b/src/gui/image/qimagereader.cpp
index 1fa1058..e7b1000 100644
--- a/src/gui/image/qimagereader.cpp
+++ b/src/gui/image/qimagereader.cpp
@@ -1482,6 +1482,9 @@ QByteArray QImageReader::imageFormat(QIODevice *device)
     configure script or check the appropriate option in the graphical
     installer.
 
+    Note that the QApplication instance must be created before this function is
+    called.
+
     \sa setFormat(), QImageWriter::supportedImageFormats(), QImageIOPlugin
 */
 QList<QByteArray> QImageReader::supportedImageFormats()
diff --git a/src/gui/image/qimagewriter.cpp b/src/gui/image/qimagewriter.cpp
index 8a65ac0..504260a 100644
--- a/src/gui/image/qimagewriter.cpp
+++ b/src/gui/image/qimagewriter.cpp
@@ -679,6 +679,9 @@ bool QImageWriter::supportsOption(QImageIOHandler::ImageOption option) const
     Reading and writing SVG files is supported through Qt's
     \l{QtSvg Module}{SVG Module}.
 
+    Note that the QApplication instance must be created before this function is
+    called.
+
     \sa setFormat(), QImageReader::supportedImageFormats(), QImageIOPlugin
 */
 QList<QByteArray> QImageWriter::supportedImageFormats()
diff --git a/src/gui/itemviews/qstyleditemdelegate.cpp b/src/gui/itemviews/qstyleditemdelegate.cpp
index 0d1473d..eb54bac 100644
--- a/src/gui/itemviews/qstyleditemdelegate.cpp
+++ b/src/gui/itemviews/qstyleditemdelegate.cpp
@@ -263,6 +263,11 @@ QStyledItemDelegate::~QStyledItemDelegate()
 
     The default implementation uses the QLocale::toString to convert \a value into
     a QString.
+
+    This function is not called for empty model indices, i.e., indices for which
+    the model returns an invalid QVariant.
+
+    \sa QAbstractItemModel::data()
 */
 QString QStyledItemDelegate::displayText(const QVariant &value, const QLocale& locale) const
 {
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index e8d9efd..6a44bcc 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -598,6 +598,8 @@ void QWidget::setAutoFillBackground(bool enabled)
 
     \ingroup basicwidgets
 
+    \meta {technology} {User Interface}
+    \meta {platform} {all}
 
     The widget is the atom of the user interface: it receives mouse, keyboard
     and other events from the window system, and paints a representation of