內容

• 特性
• 公共函數
• 信號
• 靜態公共成員
• 詳細描述
• 如何構造最小 Q3DScatter 圖形

Q3DScatter 類

The Q3DScatter 類提供渲染 3D 散點圖形的方法。 更多...

頭：	#include <Q3DScatter>
Since:	QtDataVisualization 1.0
繼承：	QAbstract3DGraph

• 所有成員列錶，包括繼承成員
• 過時成員

特性

• axisX : QValue3DAxis*
• axisY : QValue3DAxis*
• axisZ : QValue3DAxis*
• selectedSeries : QScatter3DSeries* const

• 19 properties inherited from QAbstract3DGraph
• 16 特性繼承自 QWindow
• 1 特性繼承自 QObject

公共函數

	Q3DScatter (const QSurfaceFormat * format = nullptr, QWindow * parent = nullptr)
virtual	~Q3DScatter ()
void	addAxis (QValue3DAxis * axis )
void	addSeries (QScatter3DSeries * series )
QList<QValue3DAxis *>	axes () const
QValue3DAxis *	axisX () const
QValue3DAxis *	axisY () const
QValue3DAxis *	axisZ () const
void	releaseAxis (QValue3DAxis * axis )
void	removeSeries (QScatter3DSeries * series )
QScatter3DSeries *	selectedSeries () const
QList<QScatter3DSeries *>	seriesList () const
void	setAxisX (QValue3DAxis * axis )
void	setAxisY (QValue3DAxis * axis )
void	setAxisZ (QValue3DAxis * axis )

• 54 公共函數繼承自 QAbstract3DGraph
• 82 公共函數繼承自 QWindow
• 145 公共函數繼承自 QOpenGLFunctions
• 31 公共函數繼承自 QObject
• 6 公共函數繼承自 QSurface

信號

void	axisXChanged (QValue3DAxis * axis )
void	axisYChanged (QValue3DAxis * axis )
void	axisZChanged (QValue3DAxis * axis )
void	selectedSeriesChanged (QScatter3DSeries * series )

• 18 信號繼承自 QAbstract3DGraph
• 18 信號繼承自 QWindow
• 2 信號繼承自 QObject

靜態公共成員

const QMetaObject

staticMetaObject

• 1 靜態公共成員繼承自 QWindow
• 9 靜態公共成員繼承自 QObject

額外繼承成員

• 24 公共槽繼承自 QWindow
• 1 公共槽繼承自 QObject
• 18 保護函數繼承自 QWindow
• 9 保護函數繼承自 QObject

詳細描述

The Q3DScatter 類提供渲染 3D 散點圖形的方法。

This class enables developers to render scatter graphs in 3D and to view them by rotating the scene freely. Rotation is done by holding down the right mouse button and moving the mouse. Zooming is done by mouse wheel. Selection, if enabled, is done by left mouse button. The scene can be reset to default camera view by clicking mouse wheel. In touch devices rotation is done by tap-and-move, selection by tap-and-hold and zoom by pinch.

If no axes are set explicitly to Q3DScatter , temporary default axes with no labels are created. These default axes can be modified via axis accessors, but as soon any axis is set explicitly for the orientation, the default axis for that orientation is destroyed.

Q3DScatter supports more than one series visible at the same time.

如何構造最小 Q3DScatter 圖形

首先，構造 Q3DScatter . Since we are running the graph as top level window in this example, we need to clear the Qt::FramelessWindowHint flag, which gets set by default:

Q3DScatter scatter;
scatter.setFlags(scatter.flags() ^ Qt::FramelessWindowHint);
					

Now Q3DScatter is ready to receive data to be rendered. Add one series of 3 QVector3D items:

QScatter3DSeries *series = new QScatter3DSeries;
QScatterDataArray data;
data << QVector3D(0.5f, 0.5f, 0.5f) << QVector3D(-0.3f, -0.5f, -0.4f) << QVector3D(0.0f, -0.3f, 0.2f);
series->dataProxy()->addItems(data);
scatter.addSeries(series);
					

Finally you will need to set it visible:

scatter.show();
					

The complete code needed to create and display this graph is:

#include <QtDataVisualization>
using namespace QtDataVisualization;
int main(int argc, char **argv)
{
    QGuiApplication app(argc, argv);
    Q3DScatter scatter;
    scatter.setFlags(scatter.flags() ^ Qt::FramelessWindowHint);
    QScatter3DSeries *series = new QScatter3DSeries;
    QScatterDataArray data;
    data << QVector3D(0.5f, 0.5f, 0.5f) << QVector3D(-0.3f, -0.5f, -0.4f) << QVector3D(0.0f, -0.3f, 0.2f);
    series->dataProxy()->addItems(data);
    scatter.addSeries(series);
    scatter.show();
    return app.exec();
}
					

And this is what those few lines of code produce:

The scene can be rotated, zoomed into, and an item can be selected to view its position, but no other interaction is included in this minimal code example. You can learn more by familiarizing yourself with the examples provided, like the Scatter Example .

另請參閱 Q3DBars , Q3DSurface ，和 Qt Data Visualization C++ 類 .

特性文檔編製

axisX : QValue3DAxis *

This property holds the active x-axis.

訪問函數：

QValue3DAxis *	axisX () const
void	setAxisX (QValue3DAxis * axis )

通知程序信號：

void	axisXChanged (QValue3DAxis * axis )

axisY : QValue3DAxis *

This property holds the active y-axis.

訪問函數：

QValue3DAxis *	axisY () const
void	setAxisY (QValue3DAxis * axis )

通知程序信號：

void	axisYChanged (QValue3DAxis * axis )

axisZ : QValue3DAxis *

This property holds the active z-axis.

訪問函數：

QValue3DAxis *	axisZ () const
void	setAxisZ (QValue3DAxis * axis )

通知程序信號：

void	axisZChanged (QValue3DAxis * axis )

selectedSeries : QScatter3DSeries * const

This property holds the selected series or null.

訪問函數：

QScatter3DSeries *

selectedSeries () const

通知程序信號：

void	selectedSeriesChanged (QScatter3DSeries * series )

成員函數文檔編製

Q3DScatter:: Q3DScatter (const QSurfaceFormat * format = nullptr, QWindow * parent = nullptr)

Constructs a new 3D scatter graph with optional parent 窗口和錶麵 format .

[虛擬] Q3DScatter:: ~Q3DScatter ()

Destroys the 3D scatter graph.

void Q3DScatter:: addAxis ( QValue3DAxis * axis )

添加 axis to the graph. The axes added via addAxis are not yet taken to use, addAxis is simply used to give the ownership of the axis to the graph. The axis must not be null or added to another graph.

另請參閱 releaseAxis (), setAxisX (), setAxisY ()，和 setAxisZ ().

void Q3DScatter:: addSeries ( QScatter3DSeries * series )

添加 series to the graph. A graph can contain multiple series, but has only one set of axes. If the newly added series has specified a selected item, it will be highlighted and any existing selection will be cleared. Only one added series can have an active selection.

QList < QValue3DAxis *> Q3DScatter:: axes () const

返迴所有添加軸的列錶。

另請參閱 addAxis ().

QValue3DAxis *Q3DScatter:: axisZ () const

Returns the used z-axis.

注意： getter 函數對於特性 axisZ .

另請參閱 setAxisZ ().

void Q3DScatter:: releaseAxis ( QValue3DAxis * axis )

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

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

另請參閱 addAxis (), setAxisX (), setAxisY ()，和 setAxisZ ().

void Q3DScatter:: removeSeries ( QScatter3DSeries * series )

移除 series 從圖形。

QList < QScatter3DSeries *> Q3DScatter:: seriesList () const

Returns the list of series added to this graph.

void Q3DScatter:: setAxisX ( QValue3DAxis * axis )

集 axis as the active x-axis. Implicitly calls addAxis () to transfer the ownership of the axis to this graph.

若 axis is null, a temporary default axis with no labels and an automatically adjusting range is created. This temporary axis is destroyed if another axis is set explicitly to the same orientation.

注意： setter 函數對於特性 axisX .

另請參閱 axisX (), addAxis ()，和 releaseAxis ().

void Q3DScatter:: setAxisY ( QValue3DAxis * axis )

集 axis as the active y-axis. Implicitly calls addAxis () to transfer the ownership of the axis to this graph.

若 axis is null, a temporary default axis with no labels and an automatically adjusting range is created. This temporary axis is destroyed if another axis is set explicitly to the same orientation.

注意： setter 函數對於特性 axisY .

另請參閱 axisY (), addAxis ()，和 releaseAxis ().

void Q3DScatter:: setAxisZ ( QValue3DAxis * axis )

集 axis as the active z-axis. Implicitly calls addAxis () to transfer the ownership of the axis to this graph.

若 axis is null, a temporary default axis with no labels and an automatically adjusting range is created. This temporary axis is destroyed if another axis is set explicitly to the same orientation.

注意： setter 函數對於特性 axisZ .

另請參閱 axisZ (), addAxis ()，和 releaseAxis ().