QAbstract3DGraph Class

Quality of shadows.

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

Access functions:

• *activeInputHandler() const

• void setActiveInputHandler( *inputHandler)

Notifier signal:

• void activeInputHandlerChanged( *inputHandler)

This property holds the active theme of the graph.

Access functions:

• *activeTheme() const

• void setActiveTheme( *theme)

Notifier signal:

• void activeThemeChanged( *theme)

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.

This property was introduced in QtDataVisualization 1.1.

Access functions:

• qreal aspectRatio() const

• void setAspectRatio(qreal ratio)

Notifier signal:

• void aspectRatioChanged(qreal ratio)

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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.

This property was introduced in QtDataVisualization 1.1.

Access functions:

• qreal currentFps() const

Notifier signal:

• void currentFpsChanged(qreal fps)

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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.

This property was introduced in QtDataVisualization 1.2.

Access functions:

• qreal horizontalAspectRatio() const

• void setHorizontalAspectRatio(qreal ratio)

Notifier signal:

• void horizontalAspectRatioChanged(qreal ratio)

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

Defaults to the "C" locale.

This property was introduced in QtDataVisualization 1.2.

Access functions:

• locale() const

• void setLocale(const &locale)

Notifier signal:

• void localeChanged(const &locale)

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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.

This property was introduced in QtDataVisualization 1.2.

Access functions:

• qreal margin() const

• void setMargin(qreal margin)

Notifier signal:

• void marginChanged(qreal margin)

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.

This property was introduced in QtDataVisualization 1.1.

Access functions:

• bool measureFps() const

• void setMeasureFps(bool enable)

Notifier signal:

• void measureFpsChanged(bool enabled)

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This property holds 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 the static mode with massive data sets is not advisable. Static optimization works only on scatter graphs. Defaults to OptimizationDefault.

Access functions:

• optimizationHints() const

• void setOptimizationHints( hints)

Notifier signal:

• void optimizationHintsChanged( hints)

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

Defaults to false.

This property was introduced in QtDataVisualization 1.1.

Access functions:

• bool isOrthoProjection() const

• void setOrthoProjection(bool enable)

Notifier signal:

• void orthoProjectionChanged(bool enabled)

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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.

This property was introduced in QtDataVisualization 1.2.

Access functions:

• bool isPolar() const

• void setPolar(bool enable)

Notifier signal:

• void polarChanged(bool enabled)

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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.

This property was introduced in QtDataVisualization 1.2.

Access functions:

• queriedGraphPosition() const

Notifier signal:

• void queriedGraphPositionChanged(const &data)

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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.

This property was introduced in QtDataVisualization 1.2.

Access functions:

• float radialLabelOffset() const

• void setRadialLabelOffset(float offset)

Notifier signal:

• void radialLabelOffsetChanged(float offset)

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This property holds whether floor reflections are on or off.

Defaults to false.

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.

If using a custom surface format, the stencil buffer needs to be defined (QSurfaceFormat::setStencilBufferSize()) for reflections to work.

This property was introduced in QtDataVisualization 1.2.

Access functions:

• bool isReflection() const

• void setReflection(bool enable)

Notifier signal:

• void reflectionChanged(bool enabled)

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Floor reflectivity.

Larger numbers make the floor more reflective. The valid range is [0...1]. Defaults to 0.5.

This property was introduced in QtDataVisualization 1.2.

Access functions:

• qreal reflectivity() const

• void setReflectivity(qreal reflectivity)

Notifier signal:

• void reflectivityChanged(qreal reflectivity)

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This property holds 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.

Access functions:

• *scene() const

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 by the Axis Range Dragging With Labels Example.

This property was introduced in QtDataVisualization 1.1.

Access functions:

• selectedElement() const

Notifier signal:

• void selectedElementChanged( type)

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Item selection mode.

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

Access functions:

• selectionMode() const

• void setSelectionMode( mode)

Notifier signal:

• void selectionModeChanged( mode)

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This property holds the quality of the shadow.

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

Access functions:

• shadowQuality() const

• void setShadowQuality( quality)

Notifier signal:

• void shadowQualityChanged( quality)

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Destroys QAbstract3DGraph.

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.

This function was introduced in QtDataVisualization 1.1.

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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.

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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.

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Clears selection from all attached series.

Returns the list of all added custom items.

This function was introduced in QtDataVisualization 1.2.

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Returns 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.

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

This function was introduced in Qt 6.3.

Returns the list of all added input handlers.

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

This function was introduced in QtDataVisualization 1.1.

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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.

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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.

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

This function was introduced in QtDataVisualization 1.1.

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

This function was introduced in QtDataVisualization 1.1.

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

This function was introduced in QtDataVisualization 1.1.

Renders current frame to an image of imageSize. Default size is the window size. Image is rendered with antialiasing level given in msaaSamples. Default level is 0.

Returns the rendered image.

This function was introduced in QtDataVisualization 1.1.

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.

This function was introduced in QtDataVisualization 1.1.

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Can be used to get the selected custom item after receiving selectedElementChanged signal with QAbstract3DGraph::ElementCustomItem 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.

This function was introduced in QtDataVisualization 1.1.

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

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

This function was introduced in QtDataVisualization 1.1.

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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.

This function was introduced in QtDataVisualization 1.1.

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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.

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Sets 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 theme 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.

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Returns true if shadows are supported with the current configuration. OpenGL ES2 configurations do not support shadows.

Returns the list of all added themes.

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This convenience function can be used to create a custom surface format suitable for use by Qt Data Visualization 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 <QtDataVisualization/qutils.h>

// ...

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

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

#include <QtDataVisualization/qutils.h>

// ...

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