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
|
// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import QtQuick
import QtCharts
//![1]
ChartView {
id: chartView
property bool openGL: openGLSupported
animationOptions: ChartView.NoAnimation
theme: ChartView.ChartThemeDark
onOpenGLChanged: {
if (openGLSupported) {
var series1 = series("signal 1")
if (series1)
series1.useOpenGL = openGL;
var series2 = series("signal 2")
if (series2)
series2.useOpenGL = openGL;
}
}
ValueAxis {
id: axisY1
min: -1
max: 4
}
ValueAxis {
id: axisY2
min: -10
max: 5
}
ValueAxis {
id: axisX
min: 0
max: 1024
}
LineSeries {
id: lineSeries1
name: "signal 1"
axisX: axisX
axisY: axisY1
useOpenGL: chartView.openGL
}
LineSeries {
id: lineSeries2
name: "signal 2"
axisX: axisX
axisYRight: axisY2
useOpenGL: chartView.openGL
}
//![1]
//![2]
Timer {
id: refreshTimer
interval: 1 / 60 * 1000 // 60 Hz
running: true
repeat: true
onTriggered: {
dataSource.update(chartView.series(0));
dataSource.update(chartView.series(1));
}
}
//![2]
//![3]
function changeSeriesType(type) {
chartView.removeAllSeries();
// Create two new series of the correct type. Axis x is the same for both of the series,
// but the series have their own y-axes to make it possible to control the y-offset
// of the "signal sources".
var series1
var series2
if (type === "line") {
series1 = chartView.createSeries(ChartView.SeriesTypeLine, "signal 1",
axisX, axisY1);
series1.useOpenGL = chartView.openGL
series2 = chartView.createSeries(ChartView.SeriesTypeLine, "signal 2",
axisX, axisY2);
series2.useOpenGL = chartView.openGL
} else {
series1 = chartView.createSeries(ChartView.SeriesTypeScatter, "signal 1",
axisX, axisY1);
series1.markerSize = 2;
series1.borderColor = "transparent";
series1.useOpenGL = chartView.openGL
series2 = chartView.createSeries(ChartView.SeriesTypeScatter, "signal 2",
axisX, axisY2);
series2.markerSize = 2;
series2.borderColor = "transparent";
series2.useOpenGL = chartView.openGL
}
}
function createAxis(min, max) {
// The following creates a ValueAxis object that can be then set as a x or y axis for a series
return Qt.createQmlObject("import QtQuick 2.0; import QtCharts 2.0; ValueAxis { min: "
+ min + "; max: " + max + " }", chartView);
}
//![3]
function setAnimations(enabled) {
if (enabled)
chartView.animationOptions = ChartView.SeriesAnimations;
else
chartView.animationOptions = ChartView.NoAnimation;
}
function changeRefreshRate(rate) {
refreshTimer.interval = 1 / Number(rate) * 1000;
}
}
|