1 files changed, 61 insertions, 35 deletions

diff --git a/src/gui/styles/qstyleoption.cpp b/src/gui/styles/qstyleoption.cpp
index bdacbbf..04ecbc4 100644
--- a/src/gui/styles/qstyleoption.cpp
+++ b/src/gui/styles/qstyleoption.cpp
@@ -48,6 +48,7 @@
 #ifndef QT_NO_DEBUG
 #include <qdebug.h>
 #endif
+#include <QtCore/qmath.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -656,7 +657,7 @@ QStyleOptionFrameV2 &QStyleOptionFrameV2::operator=(const QStyleOptionFrame &oth
 /*!
     \enum QStyleOptionFrameV2::FrameFeature
 
-    This enum describles the different types of features a frame can have.
+    This enum describes the different types of features a frame can have.
 
     \value None Indicates a normal frame.
     \value Flat Indicates a flat frame.
@@ -711,7 +712,7 @@ QStyleOptionFrameV2 &QStyleOptionFrameV2::operator=(const QStyleOptionFrame &oth
     Constructs a QStyleOptionFrameV3 object.
 */
 QStyleOptionFrameV3::QStyleOptionFrameV3()
-    : QStyleOptionFrameV2(Version), frameShape(QFrame::NoFrame)
+    : QStyleOptionFrameV2(Version), frameShape(QFrame::NoFrame), unused(0)
 {
 }
 
@@ -725,7 +726,7 @@ QStyleOptionFrameV3::QStyleOptionFrameV3()
     \internal
 */
 QStyleOptionFrameV3::QStyleOptionFrameV3(int version)
-    : QStyleOptionFrameV2(version), frameShape(QFrame::NoFrame)
+    : QStyleOptionFrameV2(version), frameShape(QFrame::NoFrame), unused(0)
 {
 }
 
@@ -898,7 +899,7 @@ QStyleOptionViewItemV2 &QStyleOptionViewItemV2::operator=(const QStyleOptionView
 /*!
     \enum QStyleOptionViewItemV2::ViewItemFeature
 
-    This enum describles the different types of features an item can have.
+    This enum describes the different types of features an item can have.
 
     \value None      Indicates a normal item.
     \value WrapText  Indicates an item with wrapped text.
@@ -953,7 +954,7 @@ QStyleOptionViewItemV2 &QStyleOptionViewItemV2::operator=(const QStyleOptionView
     Constructs a QStyleOptionViewItemV3 object.
 */
 QStyleOptionViewItemV3::QStyleOptionViewItemV3()
-    : QStyleOptionViewItemV2(Version)
+    : QStyleOptionViewItemV2(Version), widget(0)
 {
 }
 
@@ -961,7 +962,7 @@ QStyleOptionViewItemV3::QStyleOptionViewItemV3()
     Constructs a copy of \a other.
 */
 QStyleOptionViewItemV3::QStyleOptionViewItemV3(const QStyleOptionViewItem &other)
-    : QStyleOptionViewItemV2(Version)
+    : QStyleOptionViewItemV2(Version), widget(0)
 {
     (void)QStyleOptionViewItemV3::operator=(other);
 }
@@ -990,7 +991,7 @@ QStyleOptionViewItemV3 &QStyleOptionViewItemV3::operator = (const QStyleOptionVi
     \internal
 */
 QStyleOptionViewItemV3::QStyleOptionViewItemV3(int version)
-    : QStyleOptionViewItemV2(version)
+    : QStyleOptionViewItemV2(version), widget(0)
 {
 }
 
@@ -3541,7 +3542,8 @@ QStyleOptionQ3DockWindow::QStyleOptionQ3DockWindow(int version)
 */
 
 QStyleOptionDockWidget::QStyleOptionDockWidget()
-    : QStyleOption(Version, SO_DockWidget), movable(false)
+    : QStyleOption(Version, SO_DockWidget), closable(false),
+      movable(false), floatable(false)
 {
 }
 
@@ -4256,8 +4258,7 @@ QStyleOptionRubberBand::QStyleOptionRubberBand(int version)
     parameters for drawing a title bar.
 
     QStyleOptionTitleBar contains all the information that QStyle
-    functions need to draw the title bars of QWorkspace's MDI
-    children.
+    functions need to draw the title bar of a QMdiSubWindow.
 
     For performance reasons, the access to the member variables is
     direct (i.e., using the \c . or \c -> operator). This low-level feel
@@ -4267,7 +4268,7 @@ QStyleOptionRubberBand::QStyleOptionRubberBand(int version)
     For an example demonstrating how style options can be used, see
     the \l {widgets/styles}{Styles} example.
 
-    \sa QStyleOption, QStyleOptionComplex, QWorkspace
+    \sa QStyleOption, QStyleOptionComplex, QMdiSubWindow
 */
 
 /*!
@@ -4844,7 +4845,7 @@ QStyleOptionTabBarBaseV2 &QStyleOptionTabBarBaseV2::operator = (const QStyleOpti
 
 /*! \internal */
 QStyleOptionTabBarBaseV2::QStyleOptionTabBarBaseV2(int version)
-    : QStyleOptionTabBarBase(version)
+    : QStyleOptionTabBarBase(version), documentMode(false)
 {
 }
 
@@ -4936,7 +4937,7 @@ QStyleOptionSizeGrip::QStyleOptionSizeGrip(int version)
     \brief The QStyleOptionGraphicsItem class is used to describe
     the parameters needed to draw a QGraphicsItem.
     \since 4.2
-    \ingroup multimedia
+    \ingroup graphicsview-api
 
     For performance reasons, the access to the member variables is
     direct (i.e., using the \c . or \c -> operator). This low-level feel
@@ -4981,8 +4982,7 @@ QStyleOptionSizeGrip::QStyleOptionSizeGrip(int version)
 */
 
 /*!
-    Constructs a QStyleOptionGraphicsItem. The levelOfDetail parameter is
-    initialized to 1.
+    Constructs a QStyleOptionGraphicsItem.
 */
 QStyleOptionGraphicsItem::QStyleOptionGraphicsItem()
     : QStyleOption(Version, Type), levelOfDetail(1)
@@ -4998,6 +4998,29 @@ QStyleOptionGraphicsItem::QStyleOptionGraphicsItem(int version)
 }
 
 /*!
+    \since 4.6
+
+    Returns the level of detail from the \a worldTransform.
+
+    Its value represents the maximum value of the height and
+    width of a unity rectangle, mapped using the \a worldTransform
+    of the painter used to draw the item. By default, if no
+    transformations are applied, its value is 1. If zoomed out 1:2, the level
+    of detail will be 0.5, and if zoomed in 2:1, its value is 2.
+*/
+qreal QStyleOptionGraphicsItem::levelOfDetailFromTransform(const QTransform &worldTransform)
+{
+    if (worldTransform.type() <= QTransform::TxTranslate)
+        return 1; // Translation only? The LOD is 1.
+
+    // Two unit vectors.
+    QLineF v1(0, 0, 1, 0);
+    QLineF v2(0, 0, 0, 1);
+    // LOD is the transformed area of a 1x1 rectangle.
+    return qSqrt(worldTransform.map(v1).length() * worldTransform.map(v2).length());
+}
+
+/*!
     \fn QStyleOptionGraphicsItem::QStyleOptionGraphicsItem(const QStyleOptionGraphicsItem &other)
 
     Constructs a copy of \a other.
@@ -5010,38 +5033,41 @@ QStyleOptionGraphicsItem::QStyleOptionGraphicsItem(int version)
     Make use of this rectangle to speed up item drawing when only parts of the
     item are exposed. If the whole item is exposed, this rectangle will be the
     same as QGraphicsItem::boundingRect().
+
+    This member is only initialized for items that have the
+    QGraphicsItem::ItemUsesExtendedStyleOption flag set.
 */
 
 /*!
      \variable QStyleOptionGraphicsItem::matrix
      \brief the complete transformation matrix for the item
+     \obsolete
+
+     The QMatrix provided through this member does include information about
+     any perspective transformations applied to the view or item. To get the
+     correct transformation matrix, use QPainter::transform() on the painter
+     passed into the QGraphicsItem::paint() implementation.
 
-     This matrix is the sum of the item's scene matrix and the matrix of the
-     painter used for drawing the item. It is provided for convenience,
+     This matrix is the combination of the item's scene matrix and the matrix
+     of the painter used for drawing the item. It is provided for convenience,
      allowing anvanced level-of-detail metrics that can be used to speed up
      item drawing.
 
-     To find the dimentions of an item in screen coordinates (i.e., pixels),
+     To find the dimensions of an item in screen coordinates (i.e., pixels),
      you can use the mapping functions of QMatrix, such as QMatrix::map().
 
-     \sa QStyleOptionGraphicsItem::levelOfDetail
+     This member is only initialized for items that have the
+     QGraphicsItem::ItemUsesExtendedStyleOption flag set.
+
+     \sa QStyleOptionGraphicsItem::levelOfDetailFromTransform()
 */
 
 /*!
     \variable QStyleOptionGraphicsItem::levelOfDetail
-    \brief a simple metric for determining an item's level of detail
-
-    This simple metric provides an easy way to determine the level of detail
-    for an item. Its value represents the maximum value of the height and
-    width of a unity rectangle, mapped using the complete transformation
-    matrix of the painter used to draw the item. By default, if no
-    transformations are applied, its value is 1. If zoomed out 1:2, the level
-    of detail will be 0.5, and if zoomed in 2:1, its value is 2.
-
-    For more advanced level-of-detail metrics, use
-    QStyleOptionGraphicsItem::matrix directly.
+    \obsolete
 
-    \sa QStyleOptionGraphicsItem::matrix
+    Use QStyleOptionGraphicsItem::levelOfDetailFromTransform()
+    together with QPainter::worldTransform() instead.
 */
 
 /*!
@@ -5342,10 +5368,10 @@ QDebug operator<<(QDebug debug, const QStyleOption &option)
 {
     debug << "QStyleOption(";
     debug << QStyleOption::OptionType(option.type);
-    debug << "," << (option.direction == Qt::RightToLeft ? "RightToLeft" : "LeftToRight");
-    debug << "," << option.state;
-    debug << "," << option.rect;
-    debug << ")";
+    debug << ',' << (option.direction == Qt::RightToLeft ? "RightToLeft" : "LeftToRight");
+    debug << ',' << option.state;
+    debug << ',' << option.rect;
+    debug << ')';
     return debug;
 }
 #endif