QAbstract3DGraph Class

The QAbstract3DGraph class provides a window and render loop for graphs. More...

Header: #include <QAbstract3DGraph>
CMake: find_package(Qt6 REQUIRED COMPONENTS Graphs)
target_link_libraries(mytarget PRIVATE Qt6::Graphs)
qmake: QT += graphs
Inherits: QQuickWidget
Inherited By:

Q3DBars, Q3DScatter, and Q3DSurface

Status: Technical Preview

Public Types

enum class CameraPreset { NoPreset, FrontLow, Front, FrontHigh, LeftLow, …, DirectlyBelow }
enum class ElementType { None, Series, AxisXLabel, AxisYLabel, AxisZLabel, CustomItem }
enum class OptimizationHint { Default, Legacy }
enum SelectionFlag { SelectionNone, SelectionItem, SelectionRow, SelectionItemAndRow, SelectionColumn, …, SelectionMultiSeries }
flags SelectionFlags
enum class ShadowQuality { None, Low, Medium, High, SoftLow, …, SoftHigh }

Properties

Public Functions

virtual ~QAbstract3DGraph() override
QAbstract3DInputHandler *activeInputHandler() const
Q3DTheme *activeTheme() const
int addCustomItem(QCustom3DItem *item)
void addInputHandler(QAbstract3DInputHandler *inputHandler)
void addTheme(Q3DTheme *theme)
qreal aspectRatio() const
QAbstract3DGraph::CameraPreset cameraPreset() const
QVector3D cameraTargetPosition()
float cameraXRotation()
float cameraYRotation()
float cameraZoomLevel()
void clearSelection()
int currentFps() const
QList<QCustom3DItem *> customItems() const
bool hasSeries(QAbstract3DSeries *series) const
qreal horizontalAspectRatio() const
QList<QAbstract3DInputHandler *> inputHandlers() const
bool isOrthoProjection() const
bool isPolar() const
QLocale locale() const
qreal margin() const
float maxCameraZoomLevel()
bool measureFps() const
float minCameraZoomLevel()
int msaaSamples() const
QAbstract3DGraph::OptimizationHint optimizationHint() const
QVector3D queriedGraphPosition() const
float radialLabelOffset() const
void releaseCustomItem(QCustom3DItem *item)
void releaseInputHandler(QAbstract3DInputHandler *inputHandler)
void releaseTheme(Q3DTheme *theme)
void removeCustomItem(QCustom3DItem *item)
void removeCustomItemAt(const QVector3D &position)
void removeCustomItems()
QSharedPointer<QQuickItemGrabResult> renderToImage(const QSize &imageSize = QSize())
Q3DScene *scene() const
QAbstract3DAxis *selectedAxis() const
QCustom3DItem *selectedCustomItem() const
int selectedCustomItemIndex() const
QAbstract3DGraph::ElementType selectedElement() const
int selectedLabelIndex() const
QAbstract3DGraph::SelectionFlags selectionMode() const
void setActiveInputHandler(QAbstract3DInputHandler *inputHandler)
void setActiveTheme(Q3DTheme *activeTheme)
void setAspectRatio(qreal ratio)
void setCameraPosition(float horizontal, float vertical, float zoom = 100.0f)
void setCameraPreset(QAbstract3DGraph::CameraPreset preset)
void setCameraTargetPosition(const QVector3D &target)
void setCameraXRotation(float rotation)
void setCameraYRotation(float rotation)
void setCameraZoomLevel(float level)
void setHorizontalAspectRatio(qreal ratio)
void setLocale(const QLocale &locale)
void setMargin(qreal margin)
void setMaxCameraZoomLevel(float level)
void setMeasureFps(bool enable)
void setMinCameraZoomLevel(float level)
void setMsaaSamples(int samples)
void setOptimizationHint(QAbstract3DGraph::OptimizationHint hint)
void setOrthoProjection(bool enable)
void setPolar(bool enable)
void setRadialLabelOffset(float offset)
void setSelectionMode(const QAbstract3DGraph::SelectionFlags &selectionMode)
void setShadowQuality(const QAbstract3DGraph::ShadowQuality &shadowQuality)
void setWrapCameraXRotation(bool wrap)
void setWrapCameraYRotation(bool wrap)
QAbstract3DGraph::ShadowQuality shadowQuality() const
QList<Q3DTheme *> themes() const
bool wrapCameraXRotation()
bool wrapCameraYRotation()

Signals

void activeInputHandlerChanged(QAbstract3DInputHandler *inputHandler)
void activeThemeChanged(Q3DTheme *activeTheme)
void aspectRatioChanged(qreal ratio)
void cameraPresetChanged(QAbstract3DGraph::CameraPreset preset)
void cameraTargetPositionChanged(const QVector3D &target)
void cameraXRotationChanged(float rotation)
void cameraYRotationChanged(float rotation)
void cameraZoomLevelChanged(float zoomLevel)
void currentFpsChanged(int fps)
void horizontalAspectRatioChanged(qreal ratio)
void localeChanged(const QLocale &locale)
void marginChanged(qreal margin)
void maxCameraZoomLevelChanged(float zoomLevel)
void measureFpsChanged(bool enabled)
void minCameraZoomLevelChanged(float zoomLevel)
void msaaSamplesChanged(int samples)
void optimizationHintChanged(QAbstract3DGraph::OptimizationHint hint)
void orthoProjectionChanged(bool enabled)
void polarChanged(bool enabled)
void queriedGraphPositionChanged(const QVector3D &data)
void radialLabelOffsetChanged(float offset)
void selectedElementChanged(QAbstract3DGraph::ElementType type)
void selectionModeChanged(const QAbstract3DGraph::SelectionFlags selectionMode)
void shadowQualityChanged(QAbstract3DGraph::ShadowQuality quality)
void wrapCameraXRotationChanged(bool wrap)
void wrapCameraYRotationChanged(bool wrap)
QSurfaceFormat qDefaultSurfaceFormat(bool antialias)

Detailed Description

This class subclasses a QWindow and provides render loop for graphs inheriting it.

You should not need to use this class directly, but one of its subclasses instead.

Anti-aliasing is turned on by default on C++, except in OpenGL ES2 environments, where anti-aliasing is not supported by Qt Graphs. To specify non-default anti-aliasing for a graph, give a custom surface format as a constructor parameter. You can use the convenience function qDefaultSurfaceFormat() to create the surface format object.

Note: QAbstract3DGraph sets window flag Qt::FramelessWindowHint on by default. If you want to display graph windows as standalone windows with regular window frame, clear this flag after constructing the graph. For example:

 Q3DBars *graphWindow = new Q3DBars;
 graphWindow->setFlags(graphWindow->flags() ^ Qt::FramelessWindowHint);

See also Q3DBars, Q3DScatter, Q3DSurface, and Qt Graphs C++ Classes for 3D.

Member Type Documentation

enum class QAbstract3DGraph::CameraPreset

Predefined positions for camera.

ConstantValueDescription
QAbstract3DGraph::CameraPreset::NoPreset0Used to indicate a preset has not been set, or the scene has been rotated freely.
QAbstract3DGraph::CameraPreset::FrontLow1 
QAbstract3DGraph::CameraPreset::Front2 
QAbstract3DGraph::CameraPreset::FrontHigh3 
QAbstract3DGraph::CameraPreset::LeftLow4 
QAbstract3DGraph::CameraPreset::Left5 
QAbstract3DGraph::CameraPreset::LeftHigh6 
QAbstract3DGraph::CameraPreset::RightLow7 
QAbstract3DGraph::CameraPreset::Right8 
QAbstract3DGraph::CameraPreset::RightHigh9 
QAbstract3DGraph::CameraPreset::BehindLow10 
QAbstract3DGraph::CameraPreset::Behind11 
QAbstract3DGraph::CameraPreset::BehindHigh12 
QAbstract3DGraph::CameraPreset::IsometricLeft13 
QAbstract3DGraph::CameraPreset::IsometricLeftHigh14 
QAbstract3DGraph::CameraPreset::IsometricRight15 
QAbstract3DGraph::CameraPreset::IsometricRightHigh16 
QAbstract3DGraph::CameraPreset::DirectlyAbove17 
QAbstract3DGraph::CameraPreset::DirectlyAboveCW4518 
QAbstract3DGraph::CameraPreset::DirectlyAboveCCW4519 
QAbstract3DGraph::CameraPreset::FrontBelow20In Q3DBars from FrontBelow onward these only work for graphs including negative values. They act as Preset...Low for positive-only values.
QAbstract3DGraph::CameraPreset::LeftBelow21 
QAbstract3DGraph::CameraPreset::RightBelow22 
QAbstract3DGraph::CameraPreset::BehindBelow23 
QAbstract3DGraph::CameraPreset::DirectlyBelow24Acts as FrontLow for positive-only bars.

enum class QAbstract3DGraph::ElementType

Type of an element in the graph.

ConstantValueDescription
QAbstract3DGraph::ElementType::None0No defined element.
QAbstract3DGraph::ElementType::Series1An item in a series.
QAbstract3DGraph::ElementType::AxisXLabel2The x-axis label.
QAbstract3DGraph::ElementType::AxisYLabel3The y-axis label.
QAbstract3DGraph::ElementType::AxisZLabel4The z-axis label.
QAbstract3DGraph::ElementType::CustomItem5A custom item.

enum class QAbstract3DGraph::OptimizationHint

The optimization hint for rendering.

ConstantValueDescription
QAbstract3DGraph::OptimizationHint::Default0Provides the full feature set with instancing at a good performance.
QAbstract3DGraph::OptimizationHint::Legacy1Provides the full feature set at a reasonable performance. To be used if OptimizationHint.Default performs poorly or does not work.

enum QAbstract3DGraph::SelectionFlag
flags QAbstract3DGraph::SelectionFlags

Item selection modes. Values of this enumeration can be combined with OR operator.

ConstantValueDescription
QAbstract3DGraph::SelectionNone0Selection mode disabled.
QAbstract3DGraph::SelectionItem1Selection highlights a single item.
QAbstract3DGraph::SelectionRow2Selection highlights a single row.
QAbstract3DGraph::SelectionItemAndRowSelectionItem | SelectionRowCombination flag for highlighting both item and row with different colors.
QAbstract3DGraph::SelectionColumn4Selection highlights a single column.
QAbstract3DGraph::SelectionItemAndColumnSelectionItem | SelectionColumnCombination flag for highlighting both item and column with different colors.
QAbstract3DGraph::SelectionRowAndColumnSelectionRow | SelectionColumnCombination flag for highlighting both row and column.
QAbstract3DGraph::SelectionItemRowAndColumnSelectionItem | SelectionRow | SelectionColumnCombination flag for highlighting item, row, and column.
QAbstract3DGraph::SelectionSlice8Setting this mode flag indicates that the graph should take care of the slice view handling automatically. If you wish to control the slice view yourself via Q3DScene, do not set this flag. When setting this mode flag, either SelectionRow or SelectionColumn must also be set, but not both. Slicing is supported by Q3DBars and Q3DSurface only. When this flag is set, slice mode is entered in the following situations:
  • When selection is changed explicitly via series API to a visible item
  • When selection is changed by clicking on the graph
  • When the selection mode changes and the selected item is visible
QAbstract3DGraph::SelectionMultiSeries16Setting this mode means that items for all series at same position are highlighted, instead of just the selected item. The actual selection in the other series doesn't change. When setting this mode flag, one or more of the basic selection flags (SelectionItem, SelectionRow, or SelectionColumn) must also be set. Multi-series selection is not supported for Q3DScatter.

The SelectionFlags type is a typedef for QFlags<SelectionFlag>. It stores an OR combination of SelectionFlag values.

enum class QAbstract3DGraph::ShadowQuality

Quality of shadows.

ConstantValueDescription
QAbstract3DGraph::ShadowQuality::None0Shadows are disabled.
QAbstract3DGraph::ShadowQuality::Low1Shadows are rendered in low quality.
QAbstract3DGraph::ShadowQuality::Medium2Shadows are rendered in medium quality.
QAbstract3DGraph::ShadowQuality::High3Shadows are rendered in high quality.
QAbstract3DGraph::ShadowQuality::SoftLow4Shadows are rendered in low quality with softened edges.
QAbstract3DGraph::ShadowQuality::SoftMedium5Shadows are rendered in medium quality with softened edges.
QAbstract3DGraph::ShadowQuality::SoftHigh6Shadows are rendered in high quality with softened edges.

Property Documentation

activeInputHandler : QAbstract3DInputHandler*

This property holds the active input handler used in the graph.

Access functions:

QAbstract3DInputHandler *activeInputHandler() const
void setActiveInputHandler(QAbstract3DInputHandler *inputHandler)

Notifier signal:

void activeInputHandlerChanged(QAbstract3DInputHandler *inputHandler)

activeTheme : Q3DTheme*

This property holds the active theme of the graph.

Sets activeTheme as the active theme to be used for the graph. Implicitly calls addTheme() to transfer the ownership of the theme to this graph.

If activeTheme is null, a temporary default theme is created. This temporary theme is destroyed if any theme is explicitly set later. Properties of the theme can be modified even after setting it, and the modifications take effect immediately.

Access functions:

Q3DTheme *activeTheme() const
void setActiveTheme(Q3DTheme *activeTheme)

Notifier signal:

void activeThemeChanged(Q3DTheme *activeTheme)

aspectRatio : qreal

This property holds the ratio of the graph scaling between the longest axis on the horizontal plane and the y-axis.

Defaults to 2.0.

Note: Has no effect on Q3DBars.

Access functions:

qreal aspectRatio() const
void setAspectRatio(qreal ratio)

Notifier signal:

void aspectRatioChanged(qreal ratio)

See also horizontalAspectRatio.

cameraTargetPosition : QVector3D

This property holds the camera target position as a vector or vertex in the 3D space.

Defaults to QVector3D(0.0, 0.0, 0.0).

Valid coordinate values are between -1.0...1.0, where the edge values indicate the edges of the corresponding axis range. Any values outside this range are clamped to the edge.

Note: For bar graphs, the Y-coordinate is ignored and camera always targets a point on the horizontal background.

Access functions:

QVector3D cameraTargetPosition()
void setCameraTargetPosition(const QVector3D &target)

Notifier signal:

void cameraTargetPositionChanged(const QVector3D &target)

cameraXRotation : float

This property holds the X-rotation angle of the camera around the target point in degrees.

Access functions:

float cameraXRotation()
void setCameraXRotation(float rotation)

Notifier signal:

void cameraXRotationChanged(float rotation)

cameraYRotation : float

This property holds the Y-rotation angle of the camera around the target point in degrees.

Access functions:

float cameraYRotation()
void setCameraYRotation(float rotation)

Notifier signal:

void cameraYRotationChanged(float rotation)

cameraZoomLevel : float

This property holds the camera zoom level in percentage.

The default value of 100.0f means there is no zoom in or out set in the camera. The value is limited by the minCameraZoomLevel and maxCameraZoomLevel properties.

Access functions:

float cameraZoomLevel()
void setCameraZoomLevel(float level)

Notifier signal:

void cameraZoomLevelChanged(float zoomLevel)

See also minCameraZoomLevel and maxCameraZoomLevel.

[read-only] currentFps : const int

This property holds 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.

Access functions:

int currentFps() const

Notifier signal:

void currentFpsChanged(int fps)

See also measureFps.

horizontalAspectRatio : qreal

This property holds the ratio of the graph scaling between the x-axis and z-axis.

The value of 0.0 indicates automatic scaling according to axis ranges. Defaults to 0.0.

Has no effect on Q3DBars, which handles scaling on the horizontal plane via the barThickness and barSpacing properties. Polar graphs also ignore this property.

Access functions:

qreal horizontalAspectRatio() const
void setHorizontalAspectRatio(qreal ratio)

Notifier signal:

void horizontalAspectRatioChanged(qreal ratio)

See also aspectRatio, polar, Q3DBars::barThickness, and Q3DBars::barSpacing.

locale : QLocale

This property holds the locale used for formatting various numeric labels.

Defaults to the "C" locale.

Access functions:

QLocale locale() const
void setLocale(const QLocale &locale)

Notifier signal:

void localeChanged(const QLocale &locale)

See also QValue3DAxis::labelFormat.

margin : qreal

This property holds 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 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 -1.0.

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 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.

Access functions:

qreal margin() const
void setMargin(qreal margin)

Notifier signal:

void marginChanged(qreal margin)

maxCameraZoomLevel : float

This property holds the maximum allowed camera zoom level.

If the maximum level is set to a new value that is lower than the existing minimum level, the minimum level is adjusted to the new maximum as well. If the current cameraZoomLevel is outside the new bounds, it is adjusted as well. Defaults to 500.0f.

Access functions:

float maxCameraZoomLevel()
void setMaxCameraZoomLevel(float level)

Notifier signal:

void maxCameraZoomLevelChanged(float zoomLevel)

See also cameraZoomLevel and minCameraZoomLevel.

measureFps : bool

This property holds whether rendering is done continuously instead of on demand.

If true, rendering is continuous and the value of the currentFps property is updated. Defaults to false.

Access functions:

bool measureFps() const
void setMeasureFps(bool enable)

Notifier signal:

void measureFpsChanged(bool enabled)

See also currentFps.

minCameraZoomLevel : float

This property holds the minimum allowed camera zoom level.

If the minimum level is set to a new value that is higher than the existing maximum level, the maximum level is adjusted to the new minimum as well. If the current zoomLevel is outside the new bounds, it is adjusted as well. The minCameraZoomLevel cannot be set below 1.0f. Defaults to 10.0f.

Access functions:

float minCameraZoomLevel()
void setMinCameraZoomLevel(float level)

Notifier signal:

void minCameraZoomLevelChanged(float zoomLevel)

See also cameraZoomLevel and maxCameraZoomLevel.

msaaSamples : int

This property holds the number of used samples in MSAA.

Sets the number of used MSAA samples to samples. The number of samples can be either 0, 2, 4, or 8.

Access functions:

int msaaSamples() const
void setMsaaSamples(int samples)

Notifier signal:

void msaaSamplesChanged(int samples)

optimizationHint : QAbstract3DGraph::OptimizationHint

This property holds whether the default, static, or legacy mode is used for rendering optimization.

The default mode uses instanced rendering, and provides the full feature set at the best level of performance on most systems. 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 the static mode with massive data sets is not advisable. Static optimization works only on scatter graphs. Legacy mode renders all items in th graph individually, without instancing. It should be used only if default mode does not work, i.e. if the target system does not support instancing. Defaults to Default.

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 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.

Access functions:

QAbstract3DGraph::OptimizationHint optimizationHint() const
void setOptimizationHint(QAbstract3DGraph::OptimizationHint hint)

Notifier signal:

void optimizationHintChanged(QAbstract3DGraph::OptimizationHint hint)

See also QAbstract3DSeries::mesh.

orthoProjection : bool

This property holds whether orthographic projection is used for displaying the graph.

Defaults to false.

Note: Shadows will be disabled when set to true.

Access functions:

bool isOrthoProjection() const
void setOrthoProjection(bool enable)

Notifier signal:

void orthoProjectionChanged(bool enabled)

See also QAbstract3DAxis::labelAutoRotation.

polar : bool

This property holds whether horizontal axes are changed into polar axes.

If 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 false.

Access functions:

bool isPolar() const
void setPolar(bool enable)

Notifier signal:

void polarChanged(bool enabled)

See also orthoProjection and radialLabelOffset.

[read-only] queriedGraphPosition : const QVector3D

This property holds 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 [-1, 1]. If the queried position was outside the graph bounds, the values will not reflect the real position, but will instead indicate an undefined position outside the range [-1, 1]. The value will be undefined until a query is made.

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 screen positions that contain the floor of the graph.

Access functions:

QVector3D queriedGraphPosition() const

Notifier signal:

void queriedGraphPositionChanged(const QVector3D &data)

See also Q3DScene::graphPositionQuery.

radialLabelOffset : float

This property holds the normalized horizontal offset for the axis labels of the radial polar axis.

The value 0.0 indicates that the labels should be drawn next to the 0-angle angular axis grid line. The value 1.0 indicates that the labels are drawn in their usual place at the edge of the graph background. Defaults to 1.0.

This property is ignored if the polar property value is false.

Access functions:

float radialLabelOffset() const
void setRadialLabelOffset(float offset)

Notifier signal:

void radialLabelOffsetChanged(float offset)

See also polar.

[read-only] scene : Q3DScene* const

This property holds the Q3DScene pointer that can be used to manipulate the scene and access the scene elements.

This property is read-only.

Access functions:

Q3DScene *scene() const

[read-only] selectedElement : const QAbstract3DGraph::ElementType

This property holds the element selected 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 selectedElementChanged signal is emitted.

The signal can be used for example for implementing custom input handlers, as demonstrated in the Graph Gallery example under Scatter Graph tab.

Access functions:

QAbstract3DGraph::ElementType selectedElement() const

Notifier signal:

void selectedElementChanged(QAbstract3DGraph::ElementType type)

See also selectedLabelIndex(), selectedAxis(), selectedCustomItemIndex(), selectedCustomItem(), Q3DBars::selectedSeries(), Q3DScatter::selectedSeries(), Q3DSurface::selectedSeries(), and Q3DScene::setSelectionQueryPosition().

selectionMode : QAbstract3DGraph::SelectionFlags

Item selection mode.

A combination of SelectionFlags. By default, SelectionItem. Different graph types support different selection modes.

Access functions:

QAbstract3DGraph::SelectionFlags selectionMode() const
void setSelectionMode(const QAbstract3DGraph::SelectionFlags &selectionMode)

Notifier signal:

void selectionModeChanged(const QAbstract3DGraph::SelectionFlags selectionMode)

See also SelectionFlags.

shadowQuality : QAbstract3DGraph::ShadowQuality

This property holds the quality of the shadow.

One of the ShadowQuality enum values. By default, Medium.

Note: If setting the shadow quality to a certain level fails, the level is lowered until it is successfully set. The shadowQualityChanged signal is emitted each time a change is made.

Access functions:

QAbstract3DGraph::ShadowQuality shadowQuality() const
void setShadowQuality(const QAbstract3DGraph::ShadowQuality &shadowQuality)

Notifier signal:

void shadowQualityChanged(QAbstract3DGraph::ShadowQuality quality)

See also ShadowQuality.

wrapCameraXRotation : bool

This property holds the behavior of the minimum and maximum limits in the X-rotation.

If set to true, the X-rotation of the camera is wrapped from minimum to maximum and from maximum to minimum. If set to false, the X-rotation of the camera is limited to the sector determined by the minimum and maximum values. Set to true by default.

Access functions:

bool wrapCameraXRotation()
void setWrapCameraXRotation(bool wrap)

Notifier signal:

void wrapCameraXRotationChanged(bool wrap)

wrapCameraYRotation : bool

This property holds the behavior of the minimum and maximum limits in the Y-rotation.

If true, the Y-rotation of the camera is wrapped from minimum to maximum and from maximum to minimum. If false, the Y-rotation of the camera is limited to the sector determined by the minimum and maximum values. Set to true by default.

Access functions:

bool wrapCameraYRotation()
void setWrapCameraYRotation(bool wrap)

Notifier signal:

void wrapCameraYRotationChanged(bool wrap)

Member Function Documentation

[override virtual noexcept] QAbstract3DGraph::~QAbstract3DGraph()

Destroys QAbstract3DGraph.

int QAbstract3DGraph::addCustomItem(QCustom3DItem *item)

Adds a QCustom3DItem item to the graph. Graph takes ownership of the 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.

Items are rendered in the order they have been inserted. The rendering order needs to be taken into account when having solid and transparent items.

See also removeCustomItems(), removeCustomItem(), removeCustomItemAt(), and customItems().

void QAbstract3DGraph::addInputHandler(QAbstract3DInputHandler *inputHandler)

Adds the given inputHandler to the graph. The input handlers added via addInputHandler are not taken in to use directly. Only the ownership of the inputHandler is given to the graph. The inputHandler must not be null or already added to another graph.

See also releaseInputHandler() and setActiveInputHandler().

void QAbstract3DGraph::addTheme(Q3DTheme *theme)

Adds the given theme to the graph. The themes added via addTheme are not taken in to use directly. Only the ownership of the theme is given to the graph. The theme must not be null or already added to another graph.

See also releaseTheme() and setActiveTheme().

void QAbstract3DGraph::clearSelection()

Clears selection from all attached series.

QList<QCustom3DItem *> QAbstract3DGraph::customItems() const

Returns the list of all added custom items.

See also addCustomItem().

bool QAbstract3DGraph::hasSeries(QAbstract3DSeries *series) const

Returns whether the series has already been added to the graph.

QList<QAbstract3DInputHandler *> QAbstract3DGraph::inputHandlers() const

Returns the list of all added input handlers.

See also addInputHandler().

void QAbstract3DGraph::releaseCustomItem(QCustom3DItem *item)

Gets ownership of given item back and removes the item from the graph.

Note: If the same item is added back to the graph, the texture or the texture file needs to be re-set.

See also QCustom3DItem::setTextureImage() and QCustom3DItem::setTextureFile().

void QAbstract3DGraph::releaseInputHandler(QAbstract3DInputHandler *inputHandler)

Releases the ownership of the inputHandler back to the caller, if it was added to this graph. If the released inputHandler is in use there will be no input handler active after this call.

If the default input handler is released and added back later, it behaves as any other input handler would.

See also addInputHandler() and setActiveInputHandler().

void QAbstract3DGraph::releaseTheme(Q3DTheme *theme)

Releases the ownership of the theme back to the caller, if it was added to this graph. If the released theme is in use, a new default theme will be created and set active.

If the default theme is released and added back later, it behaves as any other theme would.

See also addTheme() and setActiveTheme().

void QAbstract3DGraph::removeCustomItem(QCustom3DItem *item)

Removes the custom item. Deletes the resources allocated to it.

void QAbstract3DGraph::removeCustomItemAt(const QVector3D &position)

Removes all custom items at position. Deletes the resources allocated to them.

void QAbstract3DGraph::removeCustomItems()

Removes all custom items. Deletes the resources allocated to them.

QSharedPointer<QQuickItemGrabResult> QAbstract3DGraph::renderToImage(const QSize &imageSize = QSize())

Renders current frame to an image of imageSize. Returns a shared pointer to grab resut which can be used to access the rendered image when it's ready. Image is rendered with the current antialiasing settings.

Note: OpenGL ES2 does not support anitialiasing.

See also QQuickItem::grabToImage.

QAbstract3DAxis *QAbstract3DGraph::selectedAxis() const

Can be used to get the selected axis after receiving selectedElementChanged signal with any label type. Selection is valid until the next selectedElementChanged signal.

Returns the pointer to the selected axis, or null.

See also selectedElement.

QCustom3DItem *QAbstract3DGraph::selectedCustomItem() const

Can be used to get the selected custom item after receiving selectedElementChanged signal with QAbstract3DGraph::ElementType::CustomItem type. Ownership of the item remains with the graph. Selection is valid until the next selectedElementChanged signal.

Returns the pointer to the selected custom item, or null.

See also selectedElement.

int QAbstract3DGraph::selectedCustomItemIndex() const

Can be used to query the index of the selected custom item after receiving selectedElementChanged signal with QAbstract3DGraph::ElementType::CustomItem type. Selection is valid until the next selectedElementChanged signal.

Returns the index of the selected custom item, or -1.

See also selectedElement.

int QAbstract3DGraph::selectedLabelIndex() const

Can be used to query the index of the selected label after receiving selectedElementChanged signal with any label type. Selection is valid until the next selectedElementChanged signal.

Returns the index of the selected label, or -1.

See also selectedElement.

void QAbstract3DGraph::setActiveInputHandler(QAbstract3DInputHandler *inputHandler)

Sets inputHandler as the active input handler used in the graph. Implicitly calls addInputHandler() to transfer ownership of inputHandler to this graph.

If inputHandler is null, no input handler will be active after this call.

Note: Setter function for property activeInputHandler.

See also activeInputHandler(), addInputHandler(), and releaseInputHandler().

void QAbstract3DGraph::setCameraPosition(float horizontal, float vertical, float zoom = 100.0f)

Utility function that sets the camera rotations and distance.horizontal and vertical define the camera rotations to be used. Optional zoom parameter can be given to set the zoom percentage of the camera within the bounds defined by minCameraZoomLevel and maxCameraZoomLevel properties.

QList<Q3DTheme *> QAbstract3DGraph::themes() const

Returns the list of all added themes.

See also addTheme().

Related Non-Members

QSurfaceFormat qDefaultSurfaceFormat(bool antialias)

This convenience function can be used to create a custom surface format suitable for use by Qt Graphs graphs.

The antialias parameter specifies whether or not antialiasing is activated.

Give the surface format returned by this function to the graph constructor (C++) or set it as the window format for QQuickView (QML) before calling show() on it.

For example, disable antialiasing on C++ application:

 #include <QtGraphs/qutils.h>

 // ...

 Q3DBars *graph = new Q3DBars(qDefaultSurfaceFormat(false));

For example, enable antialiasing for direct rendering modes on QML application:

 #include <QtGraphs/qutils.h>

 // ...

 QQuickView viewer;
 viewer.setFormat(qDefaultSurfaceFormat(true));