class Q3DSurfaceWidgetItem¶

The Q3DSurfaceWidgetItem class provides methods for rendering 3D surface plots. More…

Synopsis¶

Properties¶

axisXᅟ - Active x-axis
axisYᅟ - Active y-axis
axisZᅟ - Active z-axis
flipHorizontalGridᅟ - Whether the horizontal axis grid is displayed on top of the graph rather than on the bottom
selectedSeriesᅟ - Selected series or null

Methods¶

def __init__()
def addAxis()
def addSeries()
def axes()
def axisX()
def axisY()
def axisZ()
def flipHorizontalGrid()
def releaseAxis()
def removeSeries()
def selectedSeries()
def seriesList()
def setAxisX()
def setAxisY()
def setAxisZ()
def setFlipHorizontalGrid()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description¶

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

This class enables developers to render 3D surface plots and to view them by rotating the scene freely. The visual properties of the surface such as draw mode and shading can be controlled via QSurface3DSeries .

The Q3DSurfaceWidgetItem supports selection by showing a highlighted ball on the data point where the user has clicked with the left mouse button (when the default input handler is in use) or selected via QSurface3DSeries . The selection pointer is accompanied by a label, which in the default case shows the value of the data point and the coordinates of the point.

The value range and the label format shown on the axis can be controlled through QValue3DAxis .

To rotate the graph, hold down the right mouse button and move the mouse. Zooming is done using the mouse wheel. Both actions assume the default input handler is in use.

If no axes are set explicitly for Q3DSurfaceWidgetItem , temporary default axes with no labels are created. These default axes can be modified via axis accessors, but as soon as any axis is set explicitly for the orientation, the default axis for that orientation is destroyed.

How to construct a minimal Q3DSurfaceWidgetItem graph¶

First, construct Q3DSurfaceWidgetItem . Since we are running the graph as a top-level window in this example, we need to clear the Qt::FramelessWindowHint flag, which is set by default:

quickWidget = QQuickWidget()
surface = Q3DSurfaceWidgetItem()
surface.setWidget(quickWidget)
surface.widget().setMinimumSize(QSize(256, 256))

Now Q3DSurfaceWidgetItem is ready to receive data to be rendered. Create data elements to receive values:

Note

In the new proxy-series relationship, data is held in series. Therefore, for the proxy to be able to add, delete, or edit the data, it is a prerequisite to create a series first.

data = QSurfaceDataArray()
dataRow1 = QSurfaceDataRow()
dataRow2 = QSurfaceDataRow()

First feed the data to the row elements and then add their pointers to the data element:

dataRow1 << QSurfaceDataItem(0.0f, 0.1f, 0.5f) << QSurfaceDataItem(1.0f, 0.5f, 0.5f)
dataRow2 << QSurfaceDataItem(0.0f, 1.8f, 1.0f) << QSurfaceDataItem(1.0f, 1.2f, 1.0f)
data << dataRow1 << dataRow2

Create a new series and set data to it:

series = QSurface3DSeries()
series.dataProxy().resetArray(data)
surface.addSeries(series)

Finally you will need to set it visible:

surface.widget().show()

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

if __name__ == "__main__":

    app = QApplication([])
    quickWidget = QQuickWidget()
    surface = Q3DSurfaceWidgetItem()
    surface.setWidget(quickWidget)
    surface.widget().setMinimumSize(QSize(256, 256))
    data = QSurfaceDataArray()
    dataRow1 = QSurfaceDataRow()
    dataRow2 = QSurfaceDataRow()
    dataRow1 << QSurfaceDataItem(0.0f, 0.1f, 0.5f) << QSurfaceDataItem(1.0f, 0.5f, 0.5f)
    dataRow2 << QSurfaceDataItem(0.0f, 1.8f, 1.0f) << QSurfaceDataItem(1.0f, 1.2f, 1.0f)
    data << dataRow1 << dataRow2
    series = QSurface3DSeries()
    series.dataProxy().resetArray(data)
    surface.addSeries(series)
    surface.widget().show()
    sys.exit(app.exec())

And this is what those few lines of code produce:

The scene can be rotated, zoomed into, and a surface point can be selected to view its position, but no other interactions are included in this minimal code example. You can learn more by familiarizing yourself with the examples provided, like the Surface Graph Gallery .

See also

Q3DBarsWidgetItem Q3DScatterWidgetItem Qt Graphs C++ Classes for 3D

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property axisXᅟ: QValue3DAxis¶

This property holds The active x-axis..

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

If 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.

See also

addAxis() releaseAxis()

Access functions:

axisX()
setAxisX()
Signal axisXChanged()

property axisYᅟ: QValue3DAxis¶

This property holds The active y-axis..

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

If 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.

See also

addAxis() releaseAxis()

Access functions:

axisY()
setAxisY()
Signal axisYChanged()

property axisZᅟ: QValue3DAxis¶

This property holds The active z-axis..

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

If 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.

See also

addAxis() releaseAxis()

Access functions:

axisZ()
setAxisZ()
Signal axisZChanged()

property flipHorizontalGridᅟ: bool¶

This property holds Whether the horizontal axis grid is displayed on top of the graph rather than on the bottom..

In some use cases, the horizontal axis grid is mostly covered by the surface, so it can be more useful to display the horizontal axis grid on top of the graph rather than on the bottom. A typical use case for this is showing 2D spectrograms using orthographic projection with a top-down viewpoint.

If false, the horizontal axis grid and labels are drawn on the horizontal background of the graph. If true, the horizontal axis grid and labels are drawn on the opposite side of the graph from the horizontal background. Defaults to false.

Access functions:

flipHorizontalGrid()
setFlipHorizontalGrid()
Signal flipHorizontalGridChanged()

property selectedSeriesᅟ: QSurface3DSeries¶

This property holds The selected series or null..

If selectionMode has MultiSeries set, this property holds the series which owns the selected point.

Access functions:

selectedSeries()
Signal selectedSeriesChanged()

__init__([parent=None])¶

Parameters:: parent – QObject

Constructs a new 3D surface graph with the optional parent.

addAxis(axis)¶

Parameters:: axis – QValue3DAxis

Adds 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.

See also

releaseAxis() setAxisX() setAxisY() setAxisZ()

addSeries(series)¶

Parameters:: series – QSurface3DSeries

Adds the 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.

See also

hasSeries()

axes()¶

Return type:: .list of QValue3DAxis

Returns the list of all added axes.

See also

addAxis()

axisX()¶

Return type:: QValue3DAxis

See also

setAxisX()

Getter of property axisXᅟ .

axisXChanged(axis)¶

Parameters:: axis – QValue3DAxis

Notification signal of property axisXᅟ .

axisY()¶

Return type:: QValue3DAxis

See also

setAxisY()

Getter of property axisYᅟ .

axisYChanged(axis)¶

Parameters:: axis – QValue3DAxis

Notification signal of property axisYᅟ .

axisZ()¶

Return type:: QValue3DAxis

See also

setAxisZ()

Getter of property axisZᅟ .

axisZChanged(axis)¶

Parameters:: axis – QValue3DAxis

Notification signal of property axisZᅟ .

flipHorizontalGrid()¶

Return type:: bool

See also

setFlipHorizontalGrid()

Getter of property flipHorizontalGridᅟ .

flipHorizontalGridChanged(flip)¶

Parameters:: flip – bool

Notification signal of property flipHorizontalGridᅟ .

releaseAxis(axis)¶

Parameters:: axis – QValue3DAxis

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.

See also

addAxis() setAxisX() setAxisY() setAxisZ()

removeSeries(series)¶

Parameters:: series – QSurface3DSeries

Removes the series from the graph.

See also

hasSeries()

selectedSeries()¶

Return type:: QSurface3DSeries

Getter of property selectedSeriesᅟ .

selectedSeriesChanged(series)¶

Parameters:: series – QSurface3DSeries

Notification signal of property selectedSeriesᅟ .

seriesList()¶

Return type:: .list of QSurface3DSeries

Returns the list of series added to this graph.

See also

hasSeries()

setAxisX(axis)¶

Parameters:: axis – QValue3DAxis

See also

axisX()

Setter of property axisXᅟ .

setAxisY(axis)¶

Parameters:: axis – QValue3DAxis

See also

axisY()

Setter of property axisYᅟ .

setAxisZ(axis)¶

Parameters:: axis – QValue3DAxis

See also

axisZ()

Setter of property axisZᅟ .

setFlipHorizontalGrid(flip)¶

Parameters:: flip – bool

See also

flipHorizontalGrid()

Setter of property flipHorizontalGridᅟ .