QAbstract3DGraph Class

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

头：	#include <QAbstract3DGraph>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Graphs) target_link_libraries(mytarget PRIVATE Qt6::Graphs)
qmake:	QT += graphs
继承：	QQuickWidget
继承者：	Q3DBars , Q3DScatter ，和 Q3DSurface
状态：	技术预览

• 所有成员列表，包括继承成员
• QAbstract3DGraph is part of Qt Graphs C++ Classes for 3D .

公共类型

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 }

特性

activeInputHandler : QAbstract3DInputHandler* activeTheme : Q3DTheme* aspectRatio : qreal cameraTargetPosition : QVector3D cameraXRotation : float cameraYRotation : float cameraZoomLevel : float currentFps : const int horizontalAspectRatio : qreal locale : QLocale margin : qreal maxCameraZoomLevel : float measureFps : bool

minCameraZoomLevel : float msaaSamples : int optimizationHint : QAbstract3DGraph::OptimizationHint orthoProjection : bool polar : bool queriedGraphPosition : const QVector3D radialLabelOffset : float scene : Q3DScene* const selectedElement : const QAbstract3DGraph::ElementType selectionMode : QAbstract3DGraph::SelectionFlags shadowQuality : QAbstract3DGraph::ShadowQuality wrapCameraXRotation : bool wrapCameraYRotation : bool

公共函数

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 ()

信号

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 )

相关非成员

QSurfaceFormat

qDefaultSurfaceFormat (bool antialias )

详细描述

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.

注意： 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);
					

另请参阅 Q3DBars , Q3DScatter , Q3DSurface ，和 Qt Graphs C++ Classes for 3D .

成员类型文档编制

enum class QAbstract3DGraph:: CameraPreset

用于摄像头的预定义位置。

常量	值	描述
QAbstract3DGraph::CameraPreset::NoPreset	0	Used to indicate a preset has not been set, or the scene has been rotated freely.
QAbstract3DGraph::CameraPreset::FrontLow	1
QAbstract3DGraph::CameraPreset::Front	2
QAbstract3DGraph::CameraPreset::FrontHigh	3
QAbstract3DGraph::CameraPreset::LeftLow	4
QAbstract3DGraph::CameraPreset::Left	5
QAbstract3DGraph::CameraPreset::LeftHigh	6
QAbstract3DGraph::CameraPreset::RightLow	7
QAbstract3DGraph::CameraPreset::Right	8
QAbstract3DGraph::CameraPreset::RightHigh	9
QAbstract3DGraph::CameraPreset::BehindLow	10
QAbstract3DGraph::CameraPreset::Behind	11
QAbstract3DGraph::CameraPreset::BehindHigh	12
QAbstract3DGraph::CameraPreset::IsometricLeft	13
QAbstract3DGraph::CameraPreset::IsometricLeftHigh	14
QAbstract3DGraph::CameraPreset::IsometricRight	15
QAbstract3DGraph::CameraPreset::IsometricRightHigh	16
QAbstract3DGraph::CameraPreset::DirectlyAbove	17
QAbstract3DGraph::CameraPreset::DirectlyAboveCW45	18
QAbstract3DGraph::CameraPreset::DirectlyAboveCCW45	19
QAbstract3DGraph::CameraPreset::FrontBelow	20	在 Q3DBars from FrontBelow onward these only work for graphs including negative values. They act as Preset...Low for positive-only values.
QAbstract3DGraph::CameraPreset::LeftBelow	21
QAbstract3DGraph::CameraPreset::RightBelow	22
QAbstract3DGraph::CameraPreset::BehindBelow	23
QAbstract3DGraph::CameraPreset::DirectlyBelow	24	Acts as FrontLow for positive-only bars.

enum class QAbstract3DGraph:: ElementType

Type of an element in the graph.

常量	值	描述
QAbstract3DGraph::ElementType::None	0	No defined element.
QAbstract3DGraph::ElementType::Series	1	An item in a series.
QAbstract3DGraph::ElementType::AxisXLabel	2	The x-axis label.
QAbstract3DGraph::ElementType::AxisYLabel	3	The y-axis label.
QAbstract3DGraph::ElementType::AxisZLabel	4	The z-axis label.
QAbstract3DGraph::ElementType::CustomItem	5	A custom item.

enum class QAbstract3DGraph:: OptimizationHint

The optimization hint for rendering.

常量	值	描述
QAbstract3DGraph::OptimizationHint::Default	0	Provides the full feature set with instancing at a good performance.
QAbstract3DGraph::OptimizationHint::Legacy	1	Provides 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.

常量	值	描述
QAbstract3DGraph::SelectionNone	0	Selection mode disabled.
QAbstract3DGraph::SelectionItem	1	Selection highlights a single item.
QAbstract3DGraph::SelectionRow	2	Selection highlights a single row.
QAbstract3DGraph::SelectionItemAndRow	SelectionItem | SelectionRow	Combination flag for highlighting both item and row with different colors.
QAbstract3DGraph::SelectionColumn	4	Selection highlights a single column.
QAbstract3DGraph::SelectionItemAndColumn	SelectionItem | SelectionColumn	Combination flag for highlighting both item and column with different colors.
QAbstract3DGraph::SelectionRowAndColumn	SelectionRow | SelectionColumn	Combination flag for highlighting both row and column.
QAbstract3DGraph::SelectionItemRowAndColumn	SelectionItem | SelectionRow | SelectionColumn	Combination flag for highlighting item, row, and column.
QAbstract3DGraph::SelectionSlice	8	Setting 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::SelectionMultiSeries	16	Setting 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 ，或 SelectionColumn ) must also be set. Multi-series selection is not supported for Q3DScatter .

SelectionFlags 类型是 typedef 对于 QFlags <SelectionFlag>。它存储 SelectionFlag 值的 OR 组合。

enum class QAbstract3DGraph:: ShadowQuality

Quality of shadows.

常量	值	描述
QAbstract3DGraph::ShadowQuality::None	0	Shadows are disabled.
QAbstract3DGraph::ShadowQuality::Low	1	Shadows are rendered in low quality.
QAbstract3DGraph::ShadowQuality::Medium	2	Shadows are rendered in medium quality.
QAbstract3DGraph::ShadowQuality::High	3	Shadows are rendered in high quality.
QAbstract3DGraph::ShadowQuality::SoftLow	4	Shadows are rendered in low quality with softened edges.
QAbstract3DGraph::ShadowQuality::SoftMedium	5	Shadows are rendered in medium quality with softened edges.
QAbstract3DGraph::ShadowQuality::SoftHigh	6	Shadows are rendered in high quality with softened edges.

特性文档编制

activeInputHandler : QAbstract3DInputHandler *

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

访问函数：

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

通知程序信号：

void	activeInputHandlerChanged (QAbstract3DInputHandler * inputHandler )

activeTheme : Q3DTheme *

This property holds the active theme of the graph.

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

若 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.

访问函数：

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

通知程序信号：

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.

默认为 2.0 .

注意： Has no effect on Q3DBars .

访问函数：

qreal	aspectRatio () const
void	setAspectRatio (qreal ratio )

通知程序信号：

void	aspectRatioChanged (qreal ratio )

另请参阅 horizontalAspectRatio .

cameraTargetPosition : QVector3D

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

默认为 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.

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

访问函数：

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

通知程序信号：

void	cameraTargetPositionChanged (const QVector3D & target )

cameraXRotation : float

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

访问函数：

float	cameraXRotation ()
void	setCameraXRotation (float rotation )

通知程序信号：

void	cameraXRotationChanged (float rotation )

cameraYRotation : float

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

访问函数：

float	cameraYRotation ()
void	setCameraYRotation (float rotation )

通知程序信号：

void	cameraYRotationChanged (float rotation )

cameraZoomLevel : float

此特性保持摄像头的缩放级别按百分比。

默认值 100.0f 意味着摄像头没有设置放大 (或缩小)。值被限制通过 minCameraZoomLevel and maxCameraZoomLevel 特性。

访问函数：

float	cameraZoomLevel ()
void	setCameraZoomLevel (float level )

通知程序信号：

void	cameraZoomLevelChanged (float zoomLevel )

另请参阅 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.

访问函数：

int	currentFps () const

通知程序信号：

void	currentFpsChanged (int fps )

另请参阅 measureFps .

horizontalAspectRatio : qreal

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

值 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.

访问函数：

qreal	horizontalAspectRatio () const
void	setHorizontalAspectRatio (qreal ratio )

通知程序信号：

void	horizontalAspectRatioChanged (qreal ratio )

另请参阅 aspectRatio , polar , Q3DBars::barThickness ，和 Q3DBars::barSpacing .

locale : QLocale

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

Defaults to the "C" locale.

访问函数：

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

通知程序信号：

void	localeChanged (const QLocale & locale )

另请参阅 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 .

注意： 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.

注意： 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.

访问函数：

qreal	margin () const
void	setMargin (qreal margin )

通知程序信号：

void	marginChanged (qreal margin )

maxCameraZoomLevel : float

此特性保持允许的最大摄像头缩放级别。

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 .

访问函数：

float	maxCameraZoomLevel ()
void	setMaxCameraZoomLevel (float level )

通知程序信号：

void	maxCameraZoomLevelChanged (float zoomLevel )

另请参阅 cameraZoomLevel and minCameraZoomLevel .

measureFps : bool

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

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

访问函数：

bool	measureFps () const
void	setMeasureFps (bool enable )

通知程序信号：

void	measureFpsChanged (bool enabled )

另请参阅 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 。默认为 10.0f .

访问函数：

float	minCameraZoomLevel ()
void	setMinCameraZoomLevel (float level )

通知程序信号：

void	minCameraZoomLevelChanged (float zoomLevel )

另请参阅 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.

访问函数：

int	msaaSamples () const
void	setMsaaSamples (int samples )

通知程序信号：

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 默认 .

注意： 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.

访问函数：

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

通知程序信号：

void	optimizationHintChanged (QAbstract3DGraph::OptimizationHint hint )

另请参阅 QAbstract3DSeries::mesh .

orthoProjection : bool

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

默认为 false .

注意： Shadows will be disabled when set to true .

访问函数：

bool	isOrthoProjection () const
void	setOrthoProjection (bool enable )

通知程序信号：

void	orthoProjectionChanged (bool enabled )

另请参阅 QAbstract3DAxis::labelAutoRotation .

polar : bool

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

若 true , the x-axis becomes the angular axis and the z-axis becomes the radial axis. Polar mode is not available for bar graphs.

默认为 false .

访问函数：

bool	isPolar () const
void	setPolar (bool enable )

通知程序信号：

void	polarChanged (bool enabled )

另请参阅 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.

注意： 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.

访问函数：

QVector3D

queriedGraphPosition () const

通知程序信号：

void	queriedGraphPositionChanged (const QVector3D & data )

另请参阅 Q3DScene::graphPositionQuery .

radialLabelOffset : float

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

值 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 .

访问函数：

float	radialLabelOffset () const
void	setRadialLabelOffset (float offset )

通知程序信号：

void	radialLabelOffsetChanged (float offset )

另请参阅 polar .

[read-only] scene : Q3DScene * const

此特性保持 Q3DScene pointer that can be used to manipulate the scene and access the scene elements.

This property is read-only.

访问函数：

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 信号发射。

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

访问函数：

QAbstract3DGraph::ElementType

selectedElement () const

通知程序信号：

void	selectedElementChanged (QAbstract3DGraph::ElementType type )

另请参阅 selectedLabelIndex (), selectedAxis (), selectedCustomItemIndex (), selectedCustomItem (), Q3DBars::selectedSeries (), Q3DScatter::selectedSeries (), Q3DSurface::selectedSeries ()，和 Q3DScene::setSelectionQueryPosition ().

selectionMode : QAbstract3DGraph::SelectionFlags

Item selection mode.

A combination of SelectionFlags 。默认情况下， SelectionItem . Different graph types support different selection modes.

访问函数：

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

通知程序信号：

void	selectionModeChanged (const QAbstract3DGraph::SelectionFlags selectionMode )

另请参阅 SelectionFlags .

shadowQuality : QAbstract3DGraph::ShadowQuality

This property holds the quality of the shadow.

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

注意： 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.

访问函数：

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

通知程序信号：

void	shadowQualityChanged (QAbstract3DGraph::ShadowQuality quality )

另请参阅 ShadowQuality .

wrapCameraXRotation : bool

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

若设为 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 在默认情况下。

访问函数：

bool	wrapCameraXRotation ()
void	setWrapCameraXRotation (bool wrap )

通知程序信号：

void	wrapCameraXRotationChanged (bool wrap )

wrapCameraYRotation : bool

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

若 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 在默认情况下。

访问函数：

bool	wrapCameraYRotation ()
void	setWrapCameraYRotation (bool wrap )

通知程序信号：

void	wrapCameraYRotationChanged (bool wrap )

成员函数文档编制

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

销毁 QAbstract3DGraph .

int QAbstract3DGraph:: addCustomItem ( QCustom3DItem * item )

添加 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.

另请参阅 removeCustomItems (), removeCustomItem (), removeCustomItemAt ()，和 customItems ().

void QAbstract3DGraph:: addInputHandler ( QAbstract3DInputHandler * inputHandler )

添加给定 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.

另请参阅 releaseInputHandler () 和 setActiveInputHandler ().

void QAbstract3DGraph:: addTheme ( Q3DTheme * theme )

添加给定 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.

另请参阅 releaseTheme () 和 setActiveTheme ().

void QAbstract3DGraph:: clearSelection ()

Clears selection from all attached series.

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

Returns the list of all added custom items.

另请参阅 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.

另请参阅 addInputHandler ().

void QAbstract3DGraph:: releaseCustomItem ( QCustom3DItem * item )

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

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

另请参阅 QCustom3DItem::setTextureImage () 和 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.

另请参阅 addInputHandler () 和 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.

另请参阅 addTheme () 和 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.

注意： OpenGL ES2 does not support anitialiasing.

另请参阅 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 信号。

Returns the pointer to the selected axis, or null.

另请参阅 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 信号。

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

另请参阅 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 信号。

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

另请参阅 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 信号。

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

另请参阅 selectedElement .

void QAbstract3DGraph:: setActiveInputHandler ( QAbstract3DInputHandler * inputHandler )

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

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

注意： setter 函数对于特性 activeInputHandler .

另请参阅 activeInputHandler (), addInputHandler ()，和 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 特性。

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

Returns the list of all added themes.

另请参阅 addTheme ().

相关非成员

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));
					

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