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# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
from math import cos, degrees, sqrt
from PySide6.QtCore import QObject, Signal, Slot, Qt
from PySide6.QtGui import QVector3D
from PySide6.QtDataVisualization import (QAbstract3DGraph, QAbstract3DSeries,
QScatterDataItem, QScatterDataProxy,
QScatter3DSeries, Q3DCamera,
Q3DTheme)
from axesinputhandler import AxesInputHandler
NUMBER_OF_ITEMS = 10000
CURVE_DIVIDER = 7.5
LOWER_NUMBER_OF_ITEMS = 900
LOWER_CURVE_DIVIDER = 0.75
class ScatterDataModifier(QObject):
backgroundEnabledChanged = Signal(bool)
gridEnabledChanged = Signal(bool)
shadowQualityChanged = Signal(int)
def __init__(self, scatter, parent):
super().__init__(parent)
self._graph = scatter
self._style = QAbstract3DSeries.MeshSphere
self._smooth = True
self._inputHandler = AxesInputHandler(scatter)
self._autoAdjust = True
self._itemCount = LOWER_NUMBER_OF_ITEMS
self._CURVE_DIVIDER = LOWER_CURVE_DIVIDER
self._inputHandler = AxesInputHandler(scatter)
self._graph.activeTheme().setType(Q3DTheme.ThemeStoneMoss)
self._graph.setShadowQuality(QAbstract3DGraph.ShadowQualitySoftHigh)
self._graph.scene().activeCamera().setCameraPreset(Q3DCamera.CameraPresetFront)
self._graph.scene().activeCamera().setZoomLevel(80.0)
self._proxy = QScatterDataProxy()
self._series = QScatter3DSeries(self._proxy)
self._series.setItemLabelFormat("@xTitle: @xLabel @yTitle: @yLabel @zTitle: @zLabel")
self._series.setMeshSmooth(self._smooth)
self._graph.addSeries(self._series)
# Give ownership of the handler to the graph and make it the active
# handler
self._graph.setActiveInputHandler(self._inputHandler)
# Give our axes to the input handler
self._inputHandler.setAxes(self._graph.axisX(), self._graph.axisZ(),
self._graph.axisY())
self.addData()
def addData(self):
# Configure the axes according to the data
self._graph.axisX().setTitle("X")
self._graph.axisY().setTitle("Y")
self._graph.axisZ().setTitle("Z")
dataArray = []
limit = int(sqrt(self._itemCount) / 2.0)
for i in range(-limit, limit):
for j in range(-limit, limit):
x = float(i) + 0.5
y = cos(degrees(float(i * j) / self._CURVE_DIVIDER))
z = float(j) + 0.5
dataArray.append(QScatterDataItem(QVector3D(x, y, z)))
self._graph.seriesList()[0].dataProxy().resetArray(dataArray)
@Slot(int)
def changeStyle(self, style):
comboBox = self.sender()
if comboBox:
self._style = comboBox.itemData(style)
if self._graph.seriesList():
self._graph.seriesList()[0].setMesh(self._style)
@Slot(int)
def setSmoothDots(self, smooth):
self._smooth = smooth == Qt.Checked.value
series = self._graph.seriesList()[0]
series.setMeshSmooth(self._smooth)
@Slot(int)
def changeTheme(self, theme):
currentTheme = self._graph.activeTheme()
currentTheme.setType(Q3DTheme.Theme(theme))
self.backgroundEnabledChanged.emit(currentTheme.isBackgroundEnabled())
self.gridEnabledChanged.emit(currentTheme.isGridEnabled())
@Slot()
def changePresetCamera(self):
preset = Q3DCamera.CameraPresetFrontLow.value
camera = self._graph.scene().activeCamera()
camera.setCameraPreset(Q3DCamera.CameraPreset(preset))
preset += 1
if preset > Q3DCamera.CameraPresetDirectlyBelow.value:
preset = Q3DCamera.CameraPresetFrontLow.value
@Slot(QAbstract3DGraph.ShadowQuality)
def shadowQualityUpdatedByVisual(self, sq):
self.shadowQualityChanged.emit(sq.value)
@Slot(int)
def changeShadowQuality(self, quality):
sq = QAbstract3DGraph.ShadowQuality(quality)
self._graph.setShadowQuality(sq)
@Slot(int)
def setBackgroundEnabled(self, enabled):
self._graph.activeTheme().setBackgroundEnabled(enabled == Qt.Checked.value)
@Slot(int)
def setGridEnabled(self, enabled):
self._graph.activeTheme().setGridEnabled(enabled == Qt.Checked.value)
@Slot()
def toggleItemCount(self):
if self._itemCount == NUMBER_OF_ITEMS:
self._itemCount = LOWER_NUMBER_OF_ITEMS
self._CURVE_DIVIDER = LOWER_CURVE_DIVIDER
else:
self._itemCount = NUMBER_OF_ITEMS
self._CURVE_DIVIDER = CURVE_DIVIDER
self._graph.seriesList()[0].dataProxy().resetArray([])
self.addData()
@Slot()
def toggleRanges(self):
if not self._autoAdjust:
self._graph.axisX().setAutoAdjustRange(True)
self._graph.axisZ().setAutoAdjustRange(True)
self._inputHandler.setDragSpeedModifier(1.5)
self._autoAdjust = True
else:
self._graph.axisX().setRange(-10.0, 10.0)
self._graph.axisZ().setRange(-10.0, 10.0)
self._inputHandler.setDragSpeedModifier(15.0)
self._autoAdjust = False
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