1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
# -*- coding: utf-8 -*-
#
# Licensed under the terms of the PyQwt License
# Copyright (C) 2003-2009 Gerard Vermeulen, for the original PyQwt example
# Copyright (c) 2015 Pierre Raybaut, for the PyQt5/PySide port and further
# developments (e.g. ported to PythonQwt API)
# (see LICENSE file for more details)
SHOW = True # Show test in GUI-based test launcher
import numpy as np
from qtpy.QtCore import QSize, Qt
from qtpy.QtGui import QBrush, QFont, QPainter, QPen
from qtpy.QtWidgets import QFrame
from qwt import QwtPlotCurve, QwtPlotItem, QwtScaleMap, QwtSymbol
from qwt.tests import utils
class CurveDemo1(QFrame):
def __init__(self, *args):
QFrame.__init__(self, *args)
self.xMap = QwtScaleMap()
self.xMap.setScaleInterval(-0.5, 10.5)
self.yMap = QwtScaleMap()
self.yMap.setScaleInterval(-1.1, 1.1)
# frame style
self.setFrameStyle(QFrame.Box | QFrame.Raised)
self.setLineWidth(2)
self.setMidLineWidth(3)
# calculate values
self.x = np.arange(0, 10.0, 10.0 / 27)
self.y = np.sin(self.x) * np.cos(2 * self.x)
# make curves with different styles
self.curves = []
self.titles = []
# curve 1
self.titles.append("Style: Sticks, Symbol: Ellipse")
curve = QwtPlotCurve()
curve.setPen(QPen(Qt.red))
curve.setStyle(QwtPlotCurve.Sticks)
curve.setSymbol(
QwtSymbol(QwtSymbol.Ellipse, QBrush(Qt.yellow), QPen(Qt.blue), QSize(5, 5))
)
self.curves.append(curve)
# curve 2
self.titles.append("Style: Lines, Symbol: None")
curve = QwtPlotCurve()
curve.setPen(QPen(Qt.darkBlue))
curve.setStyle(QwtPlotCurve.Lines)
self.curves.append(curve)
# curve 3
self.titles.append("Style: Lines, Symbol: None, Antialiased")
curve = QwtPlotCurve()
curve.setPen(QPen(Qt.darkBlue))
curve.setStyle(QwtPlotCurve.Lines)
curve.setRenderHint(QwtPlotItem.RenderAntialiased)
self.curves.append(curve)
# curve 4
self.titles.append("Style: Steps, Symbol: None")
curve = QwtPlotCurve()
curve.setPen(QPen(Qt.darkCyan))
curve.setStyle(QwtPlotCurve.Steps)
self.curves.append(curve)
# curve 5
self.titles.append("Style: NoCurve, Symbol: XCross")
curve = QwtPlotCurve()
curve.setStyle(QwtPlotCurve.NoCurve)
curve.setSymbol(
QwtSymbol(QwtSymbol.XCross, QBrush(), QPen(Qt.darkMagenta), QSize(5, 5))
)
self.curves.append(curve)
# attach data, using Numeric
for curve in self.curves:
curve.setData(self.x, self.y)
def shiftDown(self, rect, offset):
rect.translate(0, offset)
def paintEvent(self, event):
QFrame.paintEvent(self, event)
painter = QPainter(self)
painter.setClipRect(self.contentsRect())
self.drawContents(painter)
def drawContents(self, painter):
# draw curves
r = self.contentsRect()
dy = int(r.height() / len(self.curves))
r.setHeight(dy)
for curve in self.curves:
self.xMap.setPaintInterval(r.left(), r.right())
self.yMap.setPaintInterval(r.top(), r.bottom())
painter.setRenderHint(
QPainter.Antialiasing,
curve.testRenderHint(QwtPlotItem.RenderAntialiased),
)
curve.draw(painter, self.xMap, self.yMap, r)
self.shiftDown(r, dy)
# draw titles
r = self.contentsRect()
r.setHeight(dy)
painter.setFont(QFont("Helvetica", 8))
painter.setPen(Qt.black)
for title in self.titles:
painter.drawText(
0,
r.top(),
r.width(),
painter.fontMetrics().height(),
Qt.AlignTop | Qt.AlignHCenter,
title,
)
self.shiftDown(r, dy)
def test_curvedemo1():
"""Curve demo 1"""
utils.test_widget(CurveDemo1, size=(300, 600), options=False)
if __name__ == "__main__":
test_curvedemo1()
|
