blob: 84c5071b8a34ba9e7161343ad505390d4f0edec2 (
plain)
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
|
// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
import QtQuick
import QtCharts
Item {
id: root
width: 400
height: 300
property int currentIndex: -1
//![1]
ChartView {
id: chartView
title: "Driver Speeds, lap 1"
anchors.fill: parent
legend.alignment: Qt.AlignTop
animationOptions: ChartView.SeriesAnimations
antialiasing: true
}
//![1]
//![2]
// An example ListModel containing F1 legend drivers' speeds at speed traps
SpeedsList {
id: speedsList
Component.onCompleted: {
timer.start();
}
}
//![2]
//![3]
// A timer to mimic refreshing the data dynamically
Timer {
id: timer
interval: 700
repeat: true
triggeredOnStart: true
running: false
onTriggered: {
root.currentIndex++;
if (root.currentIndex < speedsList.count) {
// Check if there is a series for the data already
// (we are using driver name to identify series)
var lineSeries = chartView.series(speedsList.get(root.currentIndex).driver);
if (!lineSeries) {
lineSeries = chartView.createSeries(ChartView.SeriesTypeLine,
speedsList.get(root.currentIndex).driver);
chartView.axisY().min = 0;
chartView.axisY().max = 250;
chartView.axisY().tickCount = 6;
chartView.axisY().titleText = "speed (kph)";
chartView.axisX().titleText = "speed trap";
chartView.axisX().labelFormat = "%.0f";
}
lineSeries.append(speedsList.get(root.currentIndex).speedTrap,
speedsList.get(root.currentIndex).speed);
if (speedsList.get(root.currentIndex).speedTrap > 3) {
chartView.axisX().max = Number(speedsList.get(root.currentIndex).speedTrap) + 1;
chartView.axisX().min = chartView.axisX().max - 5;
} else {
chartView.axisX().max = 5;
chartView.axisX().min = 0;
}
chartView.axisX().tickCount = chartView.axisX().max - chartView.axisX().min + 1;
} else {
// No more data, change x-axis range to show all the data
timer.stop();
chartView.animationOptions = ChartView.AllAnimations;
chartView.axisX().min = 0;
chartView.axisX().max = speedsList.get(root.currentIndex - 1).speedTrap;
}
}
}
//![3]
}
|
