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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 enum import Enum
from math import sin, cos, degrees, sqrt
from PySide6.QtCore import QObject, Signal, Slot, Qt, QRandomGenerator
from PySide6.QtGui import QVector2D, QVector3D
from PySide6.QtGraphs import (QAbstract3DSeries,
QScatterDataItem, QScatterDataProxy,
QScatter3DSeries, QtGraphs3D, QGraphsTheme)
NUMBER_OF_ITEMS = 10000
CURVE_DIVIDER = 7.5
LOWER_NUMBER_OF_ITEMS = 900
LOWER_CURVE_DIVIDER = 0.75
class InputState(Enum):
StateNormal = 0
StateDraggingX = 1
StateDraggingZ = 2
StateDraggingY = 3
class ScatterDataModifier(QObject):
backgroundVisibleChanged = Signal(bool)
gridVisibleChanged = Signal(bool)
shadowQualityChanged = Signal(int)
def __init__(self, scatter, parent):
super().__init__(parent)
self._graph = scatter
self._style = QAbstract3DSeries.Mesh.Sphere
self._smooth = True
self._autoAdjust = True
self._itemCount = LOWER_NUMBER_OF_ITEMS
self._CURVE_DIVIDER = LOWER_CURVE_DIVIDER
self._graph.setShadowQuality(QtGraphs3D.ShadowQuality.SoftHigh)
self._graph.setCameraPreset(QtGraphs3D.CameraPreset.Front)
self._graph.setCameraZoomLevel(80.0)
self._graph.activeTheme().setTheme(QGraphsTheme.Theme.MixSeries)
self._graph.activeTheme().setColorScheme(QGraphsTheme.ColorScheme.Dark)
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)
self._preset = QtGraphs3D.CameraPreset.FrontLow.value
self._state = InputState.StateNormal
self._dragSpeedModifier = float(15)
self._graph.selectedElementChanged.connect(self.handleElementSelected)
self._graph.dragged.connect(self.handleAxisDragging)
self._graph.setDragButton(Qt.MouseButton.LeftButton)
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.CheckState.Checked
series = self._graph.seriesList()[0]
series.setMeshSmooth(self._smooth)
@Slot(int)
def changeTheme(self, theme):
currentTheme = self._graph.activeTheme()
currentTheme.setTheme(QGraphsTheme.Theme(theme))
self.backgroundVisibleChanged.emit(currentTheme.isPlotAreaBackgroundVisible())
self.gridVisibleChanged.emit(currentTheme.isGridVisible())
@Slot()
def changePresetCamera(self):
self._graph.setCameraPreset(QtGraphs3D.CameraPreset(self._preset))
self._preset += 1
if self._preset > QtGraphs3D.CameraPreset.DirectlyBelow.value:
self._preset = QtGraphs3D.CameraPreset.FrontLow.value
@Slot(QtGraphs3D.ShadowQuality)
def shadowQualityUpdatedByVisual(self, sq):
self.shadowQualityChanged.emit(sq.value)
@Slot(QtGraphs3D.ElementType)
def handleElementSelected(self, type):
if type == QtGraphs3D.ElementType.AxisXLabel:
self._state = InputState.StateDraggingX
elif type == QtGraphs3D.ElementType.AxisYLabel:
self._state = InputState.StateDraggingY
elif type == QtGraphs3D.ElementType.AxisZLabel:
self._state = InputState.StateDraggingZ
else:
self._state = InputState.StateNormal
@Slot(QVector2D)
def handleAxisDragging(self, delta):
distance = 0.0
# Get scene orientation from active camera
xRotation = self._graph.cameraXRotation()
yRotation = self._graph.cameraYRotation()
# Calculate directional drag multipliers based on rotation
xMulX = cos(degrees(xRotation))
xMulY = sin(degrees(xRotation))
zMulX = sin(degrees(xRotation))
zMulY = cos(degrees(xRotation))
# Get the drag amount
move = delta.toPoint()
# Flip the effect of y movement if we're viewing from below
yMove = -move.y() if yRotation < 0 else move.y()
# Adjust axes
if self._state == InputState.StateDraggingX:
axis = self._graph.axisX()
distance = (move.x() * xMulX - yMove * xMulY) / self._dragSpeedModifier
axis.setRange(axis.min() - distance, axis.max() - distance)
elif self._state == InputState.StateDraggingZ:
axis = self._graph.axisZ()
distance = (move.x() * zMulX + yMove * zMulY) / self._dragSpeedModifier
axis.setRange(axis.min() + distance, axis.max() + distance)
elif self._state == InputState.StateDraggingY:
axis = self._graph.axisY()
# No need to use adjusted y move here
distance = move.y() / self._dragSpeedModifier
axis.setRange(axis.min() + distance, axis.max() + distance)
@Slot(int)
def changeShadowQuality(self, quality):
sq = QtGraphs3D.ShadowQuality(quality)
self._graph.setShadowQuality(sq)
@Slot(int)
def setBackgroundVisible(self, state):
enabled = state == Qt.CheckState.Checked
self._graph.activeTheme().setPlotAreaBackgroundVisible(enabled)
@Slot(int)
def setGridVisible(self, state):
self._graph.activeTheme().setGridVisible(state == 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._dragSpeedModifier = 1.5
self._autoAdjust = True
else:
self._graph.axisX().setRange(-10.0, 10.0)
self._graph.axisZ().setRange(-10.0, 10.0)
self._dragSpeedModifier = float(15)
self._autoAdjust = False
def adjust_minimum_range(self, range):
if self._itemCount == LOWER_NUMBER_OF_ITEMS:
range *= 1.45
else:
range *= 4.95
self._graph.axisX().setMin(range)
self._graph.axisZ().setMin(range)
self._autoAdjust = False
def adjust_maximum_range(self, range):
if self._itemCount == LOWER_NUMBER_OF_ITEMS:
range *= 1.45
else:
range *= 4.95
self._graph.axisX().setMax(range)
self._graph.axisZ().setMax(range)
self._autoAdjust = False
def rand_vector() -> QVector3D:
generator = QRandomGenerator.global_()
x = float(generator.bounded(100)) / 2.0 - float(generator.bounded(100)) / 2.0
y = float(generator.bounded(100)) / 100.0 - float(generator.bounded(100)) / 100.0
z = float(generator.bounded(100)) / 2.0 - float(generator.bounded(100)) / 2.0
return QVector3D(x, y, z)
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