Doc: Add \brief commands for property docs (QAbstract3dGraph)

Change-Id: I076eafb31ab9710f59eb47287cf91882a56bb8e7
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>

2 files changed, 226 insertions, 170 deletions

diff --git a/src/datavisualization/doc/src/qtdatavisualization-qml-abstractdeclarative.qdoc b/src/datavisualization/doc/src/qtdatavisualization-qml-abstractdeclarative.qdoc
index e688ffb3..746a854f 100644
--- a/src/datavisualization/doc/src/qtdatavisualization-qml-abstractdeclarative.qdoc
+++ b/src/datavisualization/doc/src/qtdatavisualization-qml-abstractdeclarative.qdoc
@@ -34,62 +34,65 @@
   \ingroup datavisualization_qml
   \brief Base type for 3D visualizations.
 
-  This type is the base type for all 3D visualizations in QtDataVisualization.
+  The base type for all 3D visualizations in QtDataVisualization.
 
-  Note that this type is uncreatable, but contains properties that are shared between
+  This type is uncreatable, but it contains properties that are shared between
   the 3D visualizations.
 
-  For AbstractGraph3D enums, see \l{QAbstract3DGraph::SelectionFlag},
-  \l{QAbstract3DGraph::ShadowQuality}, \l{QAbstract3DGraph::ElementType}, and
-  \l{QAbstract3DGraph::OptimizationHint}.
-
   \sa Bars3D, Scatter3D, Surface3D, {Qt Data Visualization C++ Classes}
  */
 
 /*!
   \qmlproperty AbstractGraph3D.SelectionMode AbstractGraph3D::selectionMode
-  Active selection mode in the visualization.
+  The active selection mode in the visualization.
+  One of the QAbstract3DGraph::SelectionFlag enum values.
+
+  \sa QAbstract3DGraph::SelectionFlag
  */
 
 /*!
   \qmlproperty AbstractGraph3D.ShadowQuality AbstractGraph3D::shadowQuality
-  Shadow quality.
+  The quality of shadows. One of the QAbstract3DGraph::ShadowQuality enum
+  values.
+
+  \sa QAbstract3DGraph::ShadowQuality
  */
 
 /*!
   \qmlproperty bool AbstractGraph3D::shadowsSupported
-  This read-only property indicates if shadows are supported with the
-  current configuration or not. OpenGL ES2 configurations do not support shadows.
+  This read-only property indicates whether shadows are supported with the
+  current configuration. OpenGL ES2 configurations do not support shadows.
  */
 
 /*!
   \qmlproperty Scene3D AbstractGraph3D::scene
-  Read only property that can be used to access for example Camera3D via the Scene3D held here.
+  The Scene3D pointer that can be used to manipulate the scene and access the
+  scene elements, such as the active camera.
+
+  This property is read-only.
  */
 
 /*!
   \qmlproperty AbstractInputHandler3D AbstractGraph3D::inputHandler
-  Input handler. You can disable default input handlers by setting this property to \c {null}.
+  The active input handler used in the graph. You can disable default input
+  handlers by setting this property to null.
  */
 
 /*!
   \qmlproperty Theme3D AbstractGraph3D::theme
   The active theme of the graph.
+
+  \sa Theme3D
  */
 
 /*!
   \qmlproperty AbstractGraph3D.RenderingMode AbstractGraph3D::renderingMode
 
-  Defaults to \c{RenderIndirect}.
+  How the graph will be rendered. Defaults to \c{RenderIndirect}.
 
-  \table
-       \header
-           \li Render Mode
-           \li Description
-       \row
-           \li RenderDirectToBackground
-           \li Indicates the graph will be rendered directly on the window background.
-  This mode also clears the whole window before rendering the graph, including the areas
+  \value RenderDirectToBackground
+         Indicates that the graph will be rendered directly on the window background.
+  Clears the whole window before rendering the graph, including the areas
   outside the graph.
   Since the graphs in this rendering mode are drawn on the window background under other QML
   items, the regular QML window clearing before rendering is suppressed. The graphs handle the clearing
@@ -97,10 +100,10 @@
   If the surface format of the window supports antialiasing, it will be used (see
   \c {QtDataVisualization::qDefaultSurfaceFormat()}).
   This rendering mode offers the best performance at the expense of non-standard QML behavior. For example,
-  the graphs do not obey the Z ordering of QML items and the opacity value has no effect on them.
-       \row
-           \li RenderDirectToBackground_NoClear
-           \li Similar to RenderDirectToBackground mode, except that the graph will not clear the whole
+  the graphs do not obey the z ordering of QML items and the opacity value has no effect on them.
+
+  \value RenderDirectToBackground_NoClear
+         Similar to \c RenderDirectToBackground mode, except that the graph will not clear the whole
   window before rendering the graph. This mode is better for windows where you have other custom items
   besides the graphs that also draw on the window background. In that case you need to either take care
   of the window clearing yourself or ensure that all areas of the window are fully covered with opaque
@@ -108,18 +111,17 @@
   If one graph in the window uses either of the direct rendering modes, then all other graphs in the
   same window also drawn in direct modes should use the exact same direct rendering mode.
   Otherwise some graphs may not show up, depending on the drawing order of the graphs.
-       \row
-           \li RenderIndirect
-           \li Indicates the graph will be first rendered to an offscreen surface that
+
+  \value RenderIndirect
+         Indicates the graph will be first rendered to an offscreen surface that
   is then drawn during normal QML item rendering. The rendered image is
-  antialiased using multisampling method if it is supported in the current environment and the
+  antialiased using the multisampling method if it is supported in the current environment and the
   msaaSamples property value is greater than zero.
   This rendering mode offers good quality and normal QML item behavior at the expense of performance.
-  \endtable
 
   \note Antialiasing is not supported in OpenGL ES2 environments in any rendering mode.
 
-  \note Setting the \c antialiasing property of the graphs doesn't do anything. However, it is
+  \note Setting the \c antialiasing property of the graph does not do anything. However, it is
   set by the graph itself if the current rendering mode uses antialiasing.
 
   \sa msaaSamples
@@ -140,8 +142,8 @@
  * \qmlproperty bool AbstractGraph3D::measureFps
  * \since QtDataVisualization 1.1
  *
- * If \c {true}, the rendering is done continuously instead of on demand, and currentFps property
- * is updated. Defaults to \c{false}.
+ * If \c {true}, the rendering is done continuously instead of on demand, and
+ * the value of the currentFps property is updated. Defaults to \c{false}.
  *
  * \sa currentFps
  */
@@ -150,8 +152,8 @@
  * \qmlproperty int AbstractGraph3D::currentFps
  * \since QtDataVisualization 1.1
  *
- * When fps measuring is enabled, the results for the last second are stored in this read-only
- * property. It takes at least a second before this value updates after measurement is activated.
+ * When FPS measuring is enabled, the results for the last second are stored in this read-only
+ * property. It takes at least a second before this value updates after measuring is activated.
  *
  * \sa measureFps
  */
@@ -160,15 +162,16 @@
  * \qmlproperty list<Custom3DItem> AbstractGraph3D::customItemList
  * \since QtDataVisualization 1.1
  *
- * Add a list of \l{Custom3DItem}s to the graph. Graph takes ownership of the added items.
+ * The list of \l{Custom3DItem} items added to the graph. The graph takes ownership
+ * of the added items.
  */
 
 /*!
  * \qmlproperty bool AbstractGraph3D::polar
  * \since QtDataVisualization 1.2
  *
- * If \c {true}, the horizontal axes are changed into polar axes. The X axis becomes the
- * angular axis and the Z axis becomes the radial axis.
+ * If \c {true}, the horizontal axes are changed into polar axes. The x-axis
+ * becomes the angular axis and the z-axis becomes the radial axis.
  * Polar mode is not available for bar graphs.
  *
  * Defaults to \c{false}.
@@ -181,10 +184,11 @@
  * \since QtDataVisualization 1.2
  *
  * This property specifies the normalized horizontal offset for the axis labels of the radial
- * polar axis. The value 0.0 indicates the labels should be drawn next to the 0-angle angular
- * axis grid line. The value 1.0 indicates the labels are drawn on their normal place at the edge
- * of the graph background.
- * This property is ignored if polar property value is \c{false}. Defaults to 1.0.
+ * polar axis. The value \c 0.0 indicates that the labels should be drawn next
+ * to the 0-angle angular axis grid line. The value \c 1.0 indicates that the
+ * labels are drawn in their usual place at the edge of the graph background.
+ * This property is ignored if the polar property value is \c{false}. Defaults
+ * to \c 1.0.
  *
  * \sa polar
  */
@@ -300,16 +304,18 @@
 /*!
  * \qmlproperty AbstractGraph3D.ElementType AbstractGraph3D::selectedElement
  *
- * Can be used to query the selected element type.
- * Type is valid until the next \c selectedElementChanged signal.
+ * The element selected in the graph.
  *
- * \c selectedElementChanged signal is emitted when a selection is made in the graph.
+ * This property can be used to query the selected element type.
+ * The type is valid until a new selection is made in the graph and the
+ * \c selectedElementChanged signal is emitted.
  *
- * Signal can be used for example for implementing customized input handling, as demonstrated in
- * this \l {Qt Quick 2 Axis Dragging Example}{example}.
+ * The signal can be used for example for implementing customized input
+ * handling, as demonstrated by the \l {Qt Quick 2 Axis Dragging Example}.
  *
  * \sa selectedLabelIndex(), selectedAxis(), selectedCustomItemIndex(), selectedCustomItem(),
- * Bars3D::selectedSeries, Scatter3D::selectedSeries, Scene3D::selectionQueryPosition
+ * Bars3D::selectedSeries, Scatter3D::selectedSeries, Scene3D::selectionQueryPosition,
+ * QAbstract3DGraph::ElementType
  *
  * \since QtDataVisualization 1.1
  */
@@ -326,8 +332,8 @@
  * \qmlproperty real AbstractGraph3D::aspectRatio
  * \since QtDataVisualization 1.1
  *
- * The aspect ratio is the ratio of the graph scaling between the longest axis on the horizontal
- * plane and the Y-axis. Defaults to \c{2.0}.
+ * The ratio of the graph scaling between the longest axis on the horizontal
+ * plane and the y-axis. Defaults to \c{2.0}.
  *
  * \note Has no effect on Bars3D.
  *
@@ -338,11 +344,11 @@
  * \qmlproperty real AbstractGraph3D::horizontalAspectRatio
  * \since QtDataVisualization 1.2
  *
- * The horizontal aspect ratio is the ratio of the graph scaling between the X and Z axes.
- * Value of 0.0 indicates automatic scaling according to axis ranges.
+ * The ratio of the graph scaling between the x-axis and z-axis.
+ * The value of \c 0.0 indicates automatic scaling according to axis ranges.
  * Defaults to \c{0.0}.
  *
- * \note Has no effect on Bars3D, which handles scaling on the horizontal plane via
+ * \note Has no effect on Bars3D, which handles scaling on the horizontal plane via the
  * \l{Bars3D::barThickness}{barThickness} and \l{Bars3D::barSpacing}{barSpacing} properties.
  * Polar graphs also ignore this property.
  *
@@ -353,20 +359,23 @@
  * \qmlproperty AbstractGraph3D.OptimizationHints AbstractGraph3D::optimizationHints
  * \since QtDataVisualization 1.1
  *
- * Defines if the rendering optimization is default or static. Default mode provides the full
- * feature set at reasonable performance. Static mode optimizes graph rendering and is ideal for
+ * Whether the default or static mode is used for rendering optimization.
+ *
+ * The default mode provides the full feature set at a reasonable level of
+ * performance. The static mode optimizes graph rendering and is ideal for
  * large non-changing data sets. It is slower with dynamic data changes and item rotations.
- * Selection is not optimized, so using it with massive data sets is not advisable.
- * Static works only on the Scatter graph.
- * Defaults to \c{OptimizationDefault}.
+ * Selection is not optimized, so using the static mode with massive data sets is not advisable.
+ * Static optimization works only on scatter graphs.
+ * Defaults to \l{QAbstract3DGraph::OptimizationDefault}{OptimizationDefault}.
  *
  * \note On some environments, large graphs using static optimization may not render, because
- * all of the items are rendered using a single draw call, and different graphics drivers have
- * different maximum vertice counts per call that they support.
- * This is mostly an issue on 32bit and/or OpenGL ES2 platforms.
- * To work around this issue, choose an item mesh with low vertex count or use the point mesh.
+ * all of the items are rendered using a single draw call, and different graphics drivers
+ * support different maximum vertice counts per call.
+ * This is mostly an issue on 32bit and OpenGL ES2 platforms.
+ * To work around this issue, choose an item mesh with a low vertex count or use
+ * the point mesh.
  *
- * \sa Abstract3DSeries::mesh
+ * \sa Abstract3DSeries::mesh, QAbstract3DGraph::OptimizationHint
  */
 
 /*!
@@ -375,9 +384,8 @@
  *
  * Sets floor reflections on or off. Defaults to \c{false}.
  *
- * \note Affects only Bars3D.
- *
- * \note In Bars3D graphs holding both positive and negative values, reflections are not supported
+ * \note Affects only Bars3D. However, in Bars3D graphs holding both positive
+ * and negative values, reflections are not supported
  * for custom items that intersect the floor plane. In that case, reflections should be turned off
  * to avoid incorrect rendering.
  *
@@ -388,7 +396,8 @@
  * \qmlproperty real AbstractGraph3D::reflectivity
  * \since QtDataVisualization 1.2
  *
- * Adjusts floor reflectivity, larger number being more reflective. Valid range is \c{[0...1]}.
+ * Sets floor reflectivity. Larger numbers make the floor more reflective. The
+ * valid range is \c{[0...1]}.
  * Defaults to \c{0.5}.
  *
  * \note Affects only Bars3D.
@@ -401,7 +410,7 @@
  * \since QtDataVisualization 1.2
  *
  * Sets the locale used for formatting various numeric labels.
- * Defaults to \c{"C"} locale.
+ * Defaults to the \c{"C"} locale.
  *
  * \sa ValueAxis3D::labelFormat
  */
@@ -414,14 +423,14 @@
  * Scene3D::graphPositionQuery. The values are normalized to range \c{[-1, 1]}.
  * If the queried position was outside the graph bounds, the values
  * will not reflect the real position, but will instead be some undefined position outside
- * the range \c{[-1, 1]}. The value will be undefined before any queries are made.
+ * the range \c{[-1, 1]}. The value will be undefined until a query is made.
  *
- * There isn't a single correct 3D coordinate to match to each specific screen position, so to be
+ * There is no single correct 3D coordinate to match a particular screen position, so to be
  * consistent, the queries are always done against the inner sides of an invisible box surrounding
  * the graph.
  *
  * \note Bar graphs only allow querying graph position at the graph floor level,
- * so the Y-value is always zero for bar graphs and the valid queries can be only made at
+ * so the y-value is always zero for bar graphs and valid queries can be only made at
  * screen positions that contain the floor of the graph.
  *
  * \sa Scene3D::graphPositionQuery
@@ -431,18 +440,20 @@
  * \qmlproperty real AbstractGraph3D::margin
  * \since QtDataVisualization 1.2
  *
- * This property contains the absolute value used for graph margin. The graph margin is the space
- * left between the edge of the plottable graph area and the edge of the graph background.
+ * The absolute value used for the space left between the edge of the
+ * plottable graph area and the edge of the graph background.
+ *
  * If the margin value is negative, the margins are determined automatically and can vary according
- * to size of the items in the series and the type of the graph.
- * The value is interpreted as a fraction of Y-axis range, provided the graph aspect ratios have
- * not beed changed from the defaults.
+ * to the size of the items in the series and the type of the graph.
+ * The value is interpreted as a fraction of the y-axis range if the graph
+ * aspect ratios have not beed changed from the default values.
  * Defaults to \c{-1.0}.
  *
- * \note Having smaller than the automatically determined margin on scatter graph can cause
- * the scatter items at the edges of the graph to overlap with the graph background.
+ * \note Setting a smaller margin for a scatter graph than the automatically
+ * determined margin can cause the scatter items at the edges of the graph to
+ * overlap with the graph background.
  *
- * \note On scatter and surface graphs, if the margin is comparatively small to the axis label
+ * \note On scatter and surface graphs, if the margin is small in comparison to the axis label
  * size, the positions of the edge labels of the axes are adjusted to avoid overlap with
  * the edge labels of the neighboring axes.
  */
diff --git a/src/datavisualization/engine/qabstract3dgraph.cpp b/src/datavisualization/engine/qabstract3dgraph.cpp
index 50ccef00..dfedacd0 100644
--- a/src/datavisualization/engine/qabstract3dgraph.cpp
+++ b/src/datavisualization/engine/qabstract3dgraph.cpp
@@ -143,15 +143,15 @@ QT_BEGIN_NAMESPACE_DATAVISUALIZATION
     \value ElementNone
            No defined element.
     \value ElementSeries
-           A series (i.e. an item in a series).
+           A series (that is, an item in a series).
     \value ElementAxisXLabel
-           X axis label.
+           The x-axis label.
     \value ElementAxisYLabel
-           Y axis label.
+           The y-axis label.
     \value ElementAxisZLabel
-           Z axis label.
+           The z-axis label.
     \value ElementCustomItem
-           Custom item.
+           A custom item.
 */
 
 /*!
@@ -269,10 +269,15 @@ void QAbstract3DGraph::releaseInputHandler(QAbstract3DInputHandler *inputHandler
 /*!
  * \property QAbstract3DGraph::activeInputHandler
  *
- * The active \a inputHandler used in the graph. Implicitly calls addInputHandler() to transfer
- * ownership of the \a inputHandler to this graph.
+ * \brief The active input handler used in the graph.
+ */
+
+/*!
+ * Sets \a inputHandler as the active input handler used in the graph.
+ * Implicitly calls addInputHandler() to transfer ownership of \a inputHandler
+ * to this graph.
  *
- * If the \a inputHandler is null, no input handler will be active after this call.
+ * If \a inputHandler is null, no input handler will be active after this call.
  *
  * \sa addInputHandler(), releaseInputHandler()
  */
@@ -287,7 +292,7 @@ QAbstract3DInputHandler *QAbstract3DGraph::activeInputHandler() const
 }
 
 /*!
- * \return list of all added input handlers.
+ * Returns the list of all added input handlers.
  *
  * \sa addInputHandler()
  */
@@ -298,7 +303,7 @@ QList<QAbstract3DInputHandler *> QAbstract3DGraph::inputHandlers() const
 
 /*!
  * Adds the given \a theme to the graph. The themes added via addTheme are not taken in to use
- * directly. Only the ownership of the a\ theme is given to the graph.
+ * directly. Only the ownership of the theme is given to the graph.
  * The \a theme must not be null or already added to another graph.
  *
  * \sa releaseTheme(), setActiveTheme()
@@ -324,11 +329,16 @@ void QAbstract3DGraph::releaseTheme(Q3DTheme *theme)
 /*!
  * \property QAbstract3DGraph::activeTheme
  *
- * The active \a theme to be used for the graph. Implicitly calls addTheme() to transfer ownership
- * of the \a theme to this graph.
- * If the \a theme is null, a temporary default theme is created. This temporary theme is destroyed
+ * \brief The active theme of the graph.
+ */
+
+/*!
+ * Sets \a theme as the active theme to be used for the graph. Implicitly calls
+ * addTheme() to transfer the ownership of the theme to this graph.
+ *
+ * If \a theme is null, a temporary default theme is created. This temporary theme is destroyed
  * if any theme is explicitly set later.
- * Properties of the \a theme can be modified even after setting it, and the modifications take
+ * Properties of the theme can be modified even after setting it, and the modifications take
  * effect immediately.
  */
 void QAbstract3DGraph::setActiveTheme(Q3DTheme *theme)
@@ -343,7 +353,7 @@ Q3DTheme *QAbstract3DGraph::activeTheme() const
 }
 
 /*!
- * \return list of all added themes.
+ * Returns the list of all added themes.
  *
  * \sa addTheme()
  */
@@ -355,10 +365,12 @@ QList<Q3DTheme *> QAbstract3DGraph::themes() const
 /*!
  * \property QAbstract3DGraph::selectionMode
  *
- * Sets selection \a mode to a combination of SelectionFlags. It is preset to
- * \c SelectionItem by default.
- * Different graph types support different selection modes. See SelectionFlags
- * documentation for details.
+ * \brief Item selection mode.
+ *
+ * A combination of SelectionFlags. By default, \c SelectionItem.
+ * Different graph types support different selection modes.
+ *
+ * \sa SelectionFlags
  */
 void QAbstract3DGraph::setSelectionMode(SelectionFlags mode)
 {
@@ -373,12 +385,15 @@ QAbstract3DGraph::SelectionFlags QAbstract3DGraph::selectionMode() const
 /*!
  * \property QAbstract3DGraph::shadowQuality
  *
- * Sets the shadow \a quality to one of the ShadowQuality enum values. It is preset to
- * \c ShadowQualityMedium by default.
+ * \brief The quality of the shadow.
+ *
+ * One of the ShadowQuality enum values. By default, \c ShadowQualityMedium.
  *
  * \note If setting the shadow quality to a certain level fails, the level is lowered
- * until it is successfully set. The \c shadowQualityChanged signal is emitted for each time
- * a change is done.
+ * until it is successfully set. The \c shadowQualityChanged signal is emitted each time
+ * a change is made.
+ *
+ * \sa ShadowQuality
  */
 void QAbstract3DGraph::setShadowQuality(ShadowQuality quality)
 {
@@ -391,7 +406,7 @@ QAbstract3DGraph::ShadowQuality QAbstract3DGraph::shadowQuality() const
 }
 
 /*!
- * \return true if shadows are supported with the current configuration.
+ * Returns \c true if shadows are supported with the current configuration.
  * OpenGL ES2 configurations do not support shadows.
  */
 bool QAbstract3DGraph::shadowsSupported() const
@@ -402,8 +417,10 @@ bool QAbstract3DGraph::shadowsSupported() const
 /*!
  * \property QAbstract3DGraph::scene
  *
- * This property is read-only and contains the Q3DScene pointer that can be used to manipulate
- * the scene and access the scene elements, such as the active camera.
+ * \brief The Q3DScene pointer that can be used to manipulate the scene and
+ * access the scene elements, such as the active camera.
+ *
+ * This property is read-only.
  */
 Q3DScene *QAbstract3DGraph::scene() const
 {
@@ -421,8 +438,9 @@ void QAbstract3DGraph::clearSelection()
 /*!
  * Adds a QCustom3DItem \a item to the graph. Graph takes ownership of the added item.
  *
- * \return index to the added item if add was successful, -1 if trying to add a null item, and
- * index of the item if trying to add an already added item.
+ * Returns the index to the added item if the add operation was successful, -1
+ * if trying to add a null item, and the index of the item if trying to add an
+ * already added item.
  *
  * \sa removeCustomItems(), removeCustomItem(), removeCustomItemAt(), customItems()
  *
@@ -479,7 +497,7 @@ void QAbstract3DGraph::releaseCustomItem(QCustom3DItem *item)
 }
 
 /*!
- * \return list of all added custom items.
+ * Returns the list of all added custom items.
  * \since QtDataVisualization 1.2
  * \sa addCustomItem()
  */
@@ -492,7 +510,7 @@ QList<QCustom3DItem *> QAbstract3DGraph::customItems() const
  * Can be used to query the index of the selected label after receiving \c selectedElementChanged
  * signal with any label type. Selection is valid until the next \c selectedElementChanged signal.
  *
- * \return index of the selected label, or -1.
+ * Returns the index of the selected label, or -1.
  *
  * \since QtDataVisualization 1.1
  *
@@ -507,7 +525,7 @@ int QAbstract3DGraph::selectedLabelIndex() const
  * Can be used to get the selected axis after receiving \c selectedElementChanged signal with any label
  * type. Selection is valid until the next \c selectedElementChanged signal.
  *
- * \return pointer to the selected axis, or null.
+ * Returns the pointer to the selected axis, or null.
  *
  * \since QtDataVisualization 1.1
  *
@@ -523,7 +541,7 @@ QAbstract3DAxis *QAbstract3DGraph::selectedAxis() const
  * signal with QAbstract3DGraph::ElementCustomItem type. Selection is valid until the next
  * \c selectedElementChanged signal.
  *
- * \return index of the selected custom item, or -1.
+ * Returns the index of the selected custom item, or -1.
  *
  * \since QtDataVisualization 1.1
  *
@@ -539,7 +557,7 @@ int QAbstract3DGraph::selectedCustomItemIndex() const
  * QAbstract3DGraph::ElementCustomItem type. Ownership of the item remains with the graph.
  * Selection is valid until the next \c selectedElementChanged signal.
  *
- * \return pointer to the selected custom item, or null.
+ * Returns the pointer to the selected custom item, or null.
  *
  * \since QtDataVisualization 1.1
  *
@@ -553,13 +571,14 @@ QCustom3DItem *QAbstract3DGraph::selectedCustomItem() const
 /*!
  * \property QAbstract3DGraph::selectedElement
  *
- * Can be used to query the selected element type.
- * Type is valid until the next \c selectedElementChanged signal.
+ * \brief The element selected in the graph.
  *
- * \c selectedElementChanged signal is emitted when a selection is made in the graph.
+ * This property can be used to query the selected element type. The type is
+ * valid until a new selection is made in the graph and the
+ * \c selectedElementChanged signal is emitted.
  *
- * Signal can be used for example for implementing custom input handlers, as demonstrated in this
- * \l {Axis Range Dragging With Labels Example}{example}.
+ * The signal can be used for example for implementing custom input handlers, as
+ * demonstrated by the \l {Axis Range Dragging With Labels Example}.
  *
  * \sa selectedLabelIndex(), selectedAxis(), selectedCustomItemIndex(), selectedCustomItem(),
  * Q3DBars::selectedSeries(), Q3DScatter::selectedSeries(), Q3DSurface::selectedSeries(),
@@ -578,7 +597,7 @@ QAbstract3DGraph::ElementType QAbstract3DGraph::selectedElement() const
  *
  * \since QtDataVisualization 1.1
  *
- * \return rendered image.
+ * Returns the rendered image.
  *
  * \note OpenGL ES2 does not support anitialiasing, so \a msaaSamples is always forced to \c{0}.
  */
@@ -594,8 +613,10 @@ QImage QAbstract3DGraph::renderToImage(int msaaSamples, const QSize &imageSize)
  * \property QAbstract3DGraph::measureFps
  * \since QtDataVisualization 1.1
  *
- * If \c {true}, the rendering is done continuously instead of on demand, and currentFps property
- * is updated. Defaults to \c{false}.
+ * \brief Whether rendering is done continuously instead of on demand.
+ *
+ * If \c {true}, rendering is continuous and the value of the currentFps
+ * property is updated. Defaults to \c{false}.
  *
  * \sa currentFps
  */
@@ -613,8 +634,11 @@ bool QAbstract3DGraph::measureFps() const
  * \property QAbstract3DGraph::currentFps
  * \since QtDataVisualization 1.1
  *
- * When fps measuring is enabled, the results for the last second are stored in this read-only
- * property. It takes at least a second before this value updates after measurement is activated.
+ * \brief The rendering results for the last second.
+ *
+ * The results are stored in this read-only property when FPS measuring is
+ * enabled. It takes at least a second before this value is updated after
+ * measuring is activated.
  *
  * \sa measureFps
  */
@@ -627,9 +651,11 @@ qreal QAbstract3DGraph::currentFps() const
  * \property QAbstract3DGraph::orthoProjection
  * \since QtDataVisualization 1.1
  *
- * If \c {true}, orthographic projection will be used for displaying the graph.
- * \note Orthographic projection can be used to create 2D graphs by replacing the default input
- * handler with one that doesn't allow rotating the graph and setting the camera to view the graph
+ * \brief Whether orthographic projection is used for displaying the graph.
+ *
+ * If \c {true}, ortographic projection is used to create 2D graphs by replacing
+ * the default input handler with one that does not allow rotating the graph and
+ * by setting the camera to view the graph
  * directly from the side or from the top. Also, axis labels typically need to be rotated when
  * viewing the graph from the sides.
  * Defaults to \c{false}.
@@ -651,8 +677,10 @@ bool QAbstract3DGraph::isOrthoProjection() const
  * \property QAbstract3DGraph::aspectRatio
  * \since QtDataVisualization 1.1
  *
- * The aspect ratio is the ratio of the graph scaling between the longest axis on the horizontal
- * plane and the Y-axis. Defaults to \c{2.0}.
+ * \brief The ratio of the graph scaling between the longest axis on the
+ * horizontal plane and the y-axis.
+ *
+ * Defaults to \c{2.0}.
  *
  * \note Has no effect on Q3DBars.
  *
@@ -671,18 +699,21 @@ qreal QAbstract3DGraph::aspectRatio() const
 /*!
  * \property QAbstract3DGraph::optimizationHints
  *
- * Defines if the rendering optimization is default or static. Default mode provides the full
- * feature set at reasonable performance. Static mode optimizes graph rendering and is ideal for
+ * \brief Whether the default or static mode is used for rendering optimization.
+ *
+ * The default mode provides the full feature set at a reasonable level of
+ * performance. The static mode optimizes graph rendering and is ideal for
  * large non-changing data sets. It is slower with dynamic data changes and item rotations.
- * Selection is not optimized, so using it with massive data sets is not advisable.
- * Static works only on the Scatter graph.
- * Defaults to \c{OptimizationDefault}.
+ * Selection is not optimized, so using the static mode with massive data sets is not advisable.
+ * Static optimization works only on scatter graphs.
+ * Defaults to \l{OptimizationDefault}.
  *
  * \note On some environments, large graphs using static optimization may not render, because
- * all of the items are rendered using a single draw call, and different graphics drivers have
- * different maximum vertice counts per call that they support.
- * This is mostly an issue on 32bit and/or OpenGL ES2 platforms.
- * To work around this issue, choose an item mesh with low vertex count or use the point mesh.
+ * all of the items are rendered using a single draw call, and different graphics drivers
+ * support different maximum vertice counts per call.
+ * This is mostly an issue on 32bit and OpenGL ES2 platforms.
+ * To work around this issue, choose an item mesh with a low vertex count or use
+ * the point mesh.
  *
  * \sa QAbstract3DSeries::mesh
  */
@@ -700,8 +731,10 @@ QAbstract3DGraph::OptimizationHints QAbstract3DGraph::optimizationHints() const
  * \property QAbstract3DGraph::polar
  * \since QtDataVisualization 1.2
  *
- * If \c {true}, the horizontal axes are changed into polar axes. The X axis becomes the
- * angular axis and the Z axis becomes the radial axis.
+ * \brief Whether horizontal axes are changed into polar axes.
+ *
+ * If \c {true}, the x-axis becomes the angular axis and the z-axis becomes the
+ * radial axis.
  * Polar mode is not available for bar graphs.
  *
  * Defaults to \c{false}.
@@ -722,11 +755,14 @@ bool QAbstract3DGraph::isPolar() const
  * \property QAbstract3DGraph::radialLabelOffset
  * \since QtDataVisualization 1.2
  *
- * This property specifies the normalized horizontal offset for the axis labels of the radial
- * polar axis. The value 0.0 indicates the labels should be drawn next to the 0-angle angular
- * axis grid line. The value 1.0 indicates the labels are drawn on their normal place at the edge
- * of the graph background.
- * This property is ignored if polar property value is \c{false}. Defaults to 1.0.
+ * \brief The normalized horizontal offset for the axis labels of the radial
+ * polar axis.
+ *
+ * The value \c 0.0 indicates that the labels should be drawn next to the 0-angle
+ * angular axis grid line. The value \c 1.0 indicates that the labels are drawn
+ * in their usual place at the edge of the graph background. Defaults to \c 1.0.
+ *
+ * This property is ignored if the \l polar property value is \c{false}.
  *
  * \sa polar
  */
@@ -744,12 +780,13 @@ float QAbstract3DGraph::radialLabelOffset() const
  * \property QAbstract3DGraph::horizontalAspectRatio
  * \since QtDataVisualization 1.2
  *
- * The horizontal aspect ratio is the ratio of the graph scaling between the X and Z axes.
- * Value of 0.0 indicates automatic scaling according to axis ranges.
+ * \brief The ratio of the graph scaling between the x-axis and z-axis.
+ *
+ * The value of \c 0.0 indicates automatic scaling according to axis ranges.
  * Defaults to \c{0.0}.
  *
- * \note Has no effect on Q3DBars, which handles scaling on the horizontal plane via
- * \l{Q3DBars::barThickness}{barThickness} and \l{Q3DBars::barSpacing}{barSpacing} properties.
+ * Has no effect on Q3DBars, which handles scaling on the horizontal plane via
+ * the \l{Q3DBars::barThickness}{barThickness} and \l{Q3DBars::barSpacing}{barSpacing} properties.
  * Polar graphs also ignore this property.
  *
  * \sa aspectRatio, polar, Q3DBars::barThickness, Q3DBars::barSpacing
@@ -768,15 +805,16 @@ qreal QAbstract3DGraph::horizontalAspectRatio() const
  * \property QAbstract3DGraph::reflection
  * \since QtDataVisualization 1.2
  *
- * Sets floor reflections on or off. Defaults to \c{false}.
+ * \brief Whether floor reflections are on or off.
  *
- * \note Affects only Q3DBars.
+ * Defaults to \c{false}.
  *
- * \note In Q3DBars graphs holding both positive and negative values, reflections are not supported
- * for custom items that intersect the floor plane. In that case, reflections should be turned off
+ * Affects only Q3DBars. However, in Q3DBars graphs holding both positive and
+ * negative values, reflections are not supported for custom items that
+ * intersect the floor plane. In that case, reflections should be turned off
  * to avoid incorrect rendering.
  *
- * \note If using custom surface format, stencil buffer needs to be defined
+ * If using a custom surface format, the stencil buffer needs to be defined
  * (QSurfaceFormat::setStencilBufferSize()) for reflections to work.
  *
  * \sa reflectivity
@@ -795,7 +833,9 @@ bool QAbstract3DGraph::isReflection() const
  * \property QAbstract3DGraph::reflectivity
  * \since QtDataVisualization 1.2
  *
- * Adjusts floor reflectivity, larger number being more reflective. Valid range is \c{[0...1]}.
+ * \brief Floor reflectivity.
+ *
+ * Larger numbers make the floor more reflective. The valid range is \c{[0...1]}.
  * Defaults to \c{0.5}.
  *
  * \note Affects only Q3DBars.
@@ -816,8 +856,9 @@ qreal QAbstract3DGraph::reflectivity() const
  * \property QAbstract3DGraph::locale
  * \since QtDataVisualization 1.2
  *
- * Sets the locale used for formatting various numeric labels.
- * Defaults to \c{"C"} locale.
+ * \brief The locale used for formatting various numeric labels.
+ *
+ * Defaults to the \c{"C"} locale.
  *
  * \sa QValue3DAxis::labelFormat
  */
@@ -835,18 +876,20 @@ QLocale QAbstract3DGraph::locale() const
  * \property QAbstract3DGraph::queriedGraphPosition
  * \since QtDataVisualization 1.2
  *
- * This read-only property contains the latest graph position values along each axis queried using
- * Q3DScene::graphPositionQuery. The values are normalized to range \c{[-1, 1]}.
+ * \brief The latest queried graph position values along each axis.
+ *
+ * This read-only property contains the results from
+ * Q3DScene::graphPositionQuery. The values are normalized to the range \c{[-1, 1]}.
  * If the queried position was outside the graph bounds, the values
- * will not reflect the real position, but will instead be some undefined position outside
- * the range \c{[-1, 1]}. The value will be undefined before any queries are made.
+ * will not reflect the real position, but will instead indicate an undefined position outside
+ * the range \c{[-1, 1]}. The value will be undefined until a query is made.
  *
- * There isn't a single correct 3D coordinate to match to each specific screen position, so to be
+ * There is no single correct 3D coordinate to match a particular screen position, so to be
  * consistent, the queries are always done against the inner sides of an invisible box surrounding
  * the graph.
  *
  * \note Bar graphs only allow querying graph position at the graph floor level,
- * so the Y-value is always zero for bar graphs and the valid queries can be only made at
+ * so the y-value is always zero for bar graphs and the valid queries can be only made at
  * screen positions that contain the floor of the graph.
  *
  * \sa Q3DScene::graphPositionQuery
@@ -860,18 +903,20 @@ QVector3D QAbstract3DGraph::queriedGraphPosition() const
  * \property QAbstract3DGraph::margin
  * \since QtDataVisualization 1.2
  *
- * This property contains the absolute value used for graph margin. The graph margin is the space
- * left between the edge of the plottable graph area and the edge of the graph background.
+ * \brief The absolute value used for the space left between the edge of the
+ * plottable graph area and the edge of the graph background.
+ *
  * If the margin value is negative, the margins are determined automatically and can vary according
- * to size of the items in the series and the type of the graph.
- * The value is interpreted as a fraction of Y-axis range, provided the graph aspect ratios have
- * not beed changed from the defaults.
+ * to the size of the items in the series and the type of the graph.
+ * The value is interpreted as a fraction of the y-axis range if the graph
+ * aspect ratios have not beed changed from the default values.
  * Defaults to \c{-1.0}.
  *
- * \note Having smaller than the automatically determined margin on scatter graph can cause
- * the scatter items at the edges of the graph to overlap with the graph background.
+ * \note Setting a smaller margin for a scatter graph than the automatically
+ * determined margin can cause the scatter items at the edges of the graph to
+ * overlap with the graph background.
  *
- * \note On scatter and surface graphs, if the margin is comparatively small to the axis label
+ * \note On scatter and surface graphs, if the margin is small in comparison to the axis label
  * size, the positions of the edge labels of the axes are adjusted to avoid overlap with
  * the edge labels of the neighboring axes.
  */
@@ -886,7 +931,7 @@ qreal QAbstract3DGraph::margin() const
 }
 
 /*!
- * \return \c{true} if the OpenGL context of the graph has been successfully initialized.
+ * Returns \c{true} if the OpenGL context of the graph has been successfully initialized.
  * Trying to use a graph when the context initialization has failed typically results in a crash.
  * A common reason for a context initialization failure is lack of sufficient platform support
  * for OpenGL.