QLineSeries相关内容_qlineseries 锯齿

学习一下Qt Charts的折线图部分。参考书籍：Qt5.9 C++开发指南

百度网盘体验地址：
链接：https://pan.baidu.com/s/1Z_5u_XZ7LV4PwFjEqD34CA 
提取码：q6d8
1
2
3

效果图

头文件

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QtCharts/QChart>
#include <QLineSeries>
#include <QValueAxis>
using namespace QtCharts;

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

public:
    //初始化界面数据
    void InitForm();
    //创建Chart
    void createChart();
    //初始化Chart，赋值数据
    void InitChart();

private slots:
    void on_rdoTop_clicked();

    void on_rdoBottom_clicked();

    void on_rdoLeft_clicked();

    void on_rdoRight_clicked();

    void on_chkLegendVisible_stateChanged(int arg1);

    void on_chkBgVisible_stateChanged(int arg1);

    void on_btnSetLegendFont_clicked();

    void on_btnSetLegendLabelColor_clicked();

    void on_lEditChartTitle_textChanged(const QString &arg1);

    void on_btnChartTitleFont_clicked();

    void on_sboxLeft_valueChanged(int arg1);

    void on_sboxTop_valueChanged(int arg1);

    void on_sboxRight_valueChanged(int arg1);

    void on_sboxBottom_valueChanged(int arg1);

    void on_comboBox_currentIndexChanged(int index);

    void on_comboBox_2_currentIndexChanged(int index);

    void on_rdoSinLine_clicked();

    void on_rdoCosLine_clicked();

    void on_rdoLineName_textChanged(const QString &arg1);

    void on_chkSeriesVisible_stateChanged(int arg1);

    void on_rdoDataPointVisible_stateChanged(int arg1);

    void on_sliderOpacity_valueChanged(int value);

    void on_btnLineColor_clicked();

    void on_chkDataPointLableVisible_stateChanged(int arg1);

    void on_btnDataPointLabelColor_clicked();

    void on_btnDataPointLabelFont_clicked();

    void on_rdoFormatY_clicked();

    void on_rdoFormatXY_clicked();

    void on_rdoAxisX_clicked();

    void on_rdoAxisY_clicked();

    void on_sboxMin_valueChanged(int arg1);

    void on_sboxMax_valueChanged(int arg1);

    void on_chkAxisVisible_stateChanged(int arg1);

    void on_lEditAxisTitle_textChanged(const QString &arg1);

    void on_chkAxisLabelVisible_stateChanged(int arg1);

    void on_lEditAxisLabelFormat_textChanged(const QString &arg1);

    void on_btnAxisTitleTextColor_clicked();

    void on_btnAxisTitleTextFont_clicked();

    void on_chkGridLineVisible_stateChanged(int arg1);

    void on_btnGridLineColor_clicked();

    void on_btnGridLinePen_clicked();

    void on_btnTickVisible_stateChanged(int arg1);

    void on_spinTickCount_valueChanged(int arg1);

    void on_btnTickLinePen_clicked();

    void on_btnTickLinePenColor_clicked();

    void on_chkMinorTickVisible_stateChanged(int arg1);

    void on_spinMinorTickCount_valueChanged(int arg1);

    void on_btnMinorTickLineColor_clicked();

    void on_btnMinorTickLinePen_clicked();

    //刷新
    void onRefresh(bool checked);
    //放大
    void onZoomIn(bool checked);
    //缩小
    void onZoomOut(bool checked);
    //原始大小
    void onOriginSize(bool checked);
    //区域放大
    void onAreaZoomIn(bool checked);
    //退出
    void onQuit(bool checked);

    void on_btnAxisLabelFont_clicked();

private:
    Ui::MainWindow *ui;

    QLineSeries *m_curSeries;   //当前操作的序列
    QValueAxis *m_curAxis;      //当前操作的坐标轴
};

#endif // MAINWINDOW_H
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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151

cpp文件

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtMath>
#include <QFontDialog>
#include <QColorDialog>
#include <QDebug>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    InitForm();
    connect(ui->actRefresh, SIGNAL(triggered(bool)), this, SLOT(onRefresh(bool)));
    connect(ui->actZoomIn, SIGNAL(triggered(bool)), this, SLOT(onZoomIn(bool)));
    connect(ui->actZoomOut, SIGNAL(triggered(bool)), this, SLOT(onZoomOut(bool)));
    connect(ui->actOriginSize, SIGNAL(triggered(bool)), this, SLOT(onOriginSize(bool)));
    connect(ui->actQuit, SIGNAL(triggered(bool)), this, SLOT(onQuit(bool)));
    connect(ui->actAreaZoomIn, SIGNAL(triggered(bool)), this, SLOT(onAreaZoomIn(bool)));
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::InitForm()
{
    //创建Chart
    createChart();
    //初始化Chart，赋值数据
    InitChart();
    //初始化部分界面，未全部初始化，相关设置代码见槽函数...
    QChart *chart = ui->chartView->chart();         //获取chart
    ui->lEditChartTitle->setText(chart->title());   //图表标题
    //图标边距
    QMargins margin = chart->margins();
    ui->sboxLeft->setValue(margin.left());
    ui->sboxTop->setValue(margin.top());
    ui->sboxRight->setValue(margin.right());
    ui->sboxBottom->setValue(margin.bottom());
    //坐标轴最大值，最小值
    QValueAxis *axisX = (QValueAxis *)ui->chartView->chart()->axisX();
    m_curAxis = axisX;
    ui->sboxMin->setValue(axisX->min());
    ui->sboxMax->setValue(axisX->max());
    m_curSeries = (QLineSeries *)ui->chartView->chart()->series().at(0);
}

void MainWindow::createChart()
{
    //添加Chart
    QChart *chart = new QChart();
    chart->setTitle(QStringLiteral("简单函数曲线"));
    chart->setTheme(QChart::ChartThemeBlueCerulean);
    ui->chartView->setChart(chart);
    ui->chartView->setRenderHint(QPainter::Antialiasing);
    //添加序列
    QLineSeries *series1 = new QLineSeries();
    QLineSeries *series2 = new QLineSeries();
    series1->setName(QStringLiteral("Sin曲线"));
    series2->setName(QStringLiteral("Cos曲线"));
    series1->setPen(QPen(Qt::red, 2, Qt::DotLine));
    series2->setPen(QPen(Qt::blue, 2, Qt::SolidLine));
    chart->addSeries(series1);
    chart->addSeries(series2);
    //创建坐标轴
    QValueAxis *axisX = new QValueAxis;
    axisX->setTitleText(QStringLiteral("角度"));
    axisX->setRange(0, 360);
    axisX->setLabelFormat("%d");
    axisX->setTickCount(10);        //设置主分隔数：10条线，形成九个网格
    axisX->setMinorTickCount(3);    //设置小分隔数：4条线，与主分隔线形成5个网格
    QValueAxis *axisY = new QValueAxis;
    axisY->setTitleText(QStringLiteral("值"));
    axisY->setRange(-2, 2);
    axisY->setLabelFormat("%.1f");
    axisY->setTickCount(5);
    axisY->setMinorTickCount(4);
    //添加坐标轴
    chart->setAxisX(axisX, series1);
    chart->setAxisY(axisY, series1);
    chart->setAxisX(axisX, series2);
    chart->setAxisY(axisY, series2);
    //设置图例字体
    QFont font("SimSun-ExtB", 9);
    ui->chartView->chart()->legend()->setFont(font);
}

void MainWindow::InitChart()
{
    QLineSeries *series1 = (QLineSeries *)ui->chartView->chart()->series().at(0);
    QLineSeries *series2 = (QLineSeries *)ui->chartView->chart()->series().at(1);
    for (int i = 0; i <= 360; i++)
    {
        series1->append(i, qSin(qDegreesToRadians(double(i))));
        series2->append(i, qCos(qDegreesToRadians(double(i))));
    }
}

void MainWindow::on_rdoTop_clicked()
{
    //图例上
    ui->chartView->chart()->legend()->setAlignment(Qt::AlignTop);
}

void MainWindow::on_rdoBottom_clicked()
{
    //图例下
    ui->chartView->chart()->legend()->setAlignment(Qt::AlignBottom);
}

void MainWindow::on_rdoLeft_clicked()
{
    //图例左
    ui->chartView->chart()->legend()->setAlignment(Qt::AlignLeft);
}

void MainWindow::on_rdoRight_clicked()
{
    //图例右
    ui->chartView->chart()->legend()->setAlignment(Qt::AlignRight);
}

void MainWindow::on_chkLegendVisible_stateChanged(int arg1)
{//设置图例：图例可见
    if (Qt::Checked == arg1)
        ui->chartView->chart()->legend()->setVisible(true);
    else
        ui->chartView->chart()->legend()->setVisible(false);
}

void MainWindow::on_chkBgVisible_stateChanged(int arg1)
{//设置图例：背景显示
    if (Qt::Checked == arg1)
        ui->chartView->chart()->legend()->setBackgroundVisible(true);
    else
        ui->chartView->chart()->legend()->setBackgroundVisible(false);
}

void MainWindow::on_btnSetLegendFont_clicked()
{//设置图例：字体
    bool ok = false;
    QFont initialFont = ui->chartView->chart()->titleFont();
    QFont font = QFontDialog::getFont(&ok, initialFont);
    qDebug() << ok;
    if (ok)
        ui->chartView->chart()->legend()->setFont(font);
}

void MainWindow::on_btnSetLegendLabelColor_clicked()
{//设置图例：标签颜色
    //setLabelColor函数会：改变图例颜色的同时，改变图例边框颜色
    QColor initialColor = ui->chartView->chart()->legend()->labelColor();
    initialColor = QColorDialog::getColor(initialColor);
    ui->chartView->chart()->legend()->setLabelColor(initialColor);
//    //注意：setColor和setBorderColor设置的是背景颜色
//    ui->chartView->chart()->legend()->setBackgroundVisible(true);//背景显示
//    ui->chartView->chart()->legend()->setColor(/*borderColor*/Qt::red);//背景颜色
//    ui->chartView->chart()->legend()->setBorderColor(/*borderColor*/Qt::black);//背景边框颜色
}

void MainWindow::on_lEditChartTitle_textChanged(const QString &arg1)
{//设置图表：标题内容
    ui->chartView->chart()->setTitle(arg1);
}

void MainWindow::on_btnChartTitleFont_clicked()
{//设置图表：标题字体
    bool ok = false;
    QFont initialFont = ui->chartView->chart()->titleFont();
    QFont font = QFontDialog::getFont(&ok, initialFont);
    qDebug() << ok;
    if (ok)
        ui->chartView->chart()->setTitleFont(font);
}

void MainWindow::on_sboxLeft_valueChanged(int arg1)
{//设置图表：左边距
    QMargins margins = ui->chartView->chart()->margins();
    margins.setLeft(arg1);
    ui->chartView->chart()->setMargins(margins);
}

void MainWindow::on_sboxTop_valueChanged(int arg1)
{//设置图表：上边距
    QMargins margins = ui->chartView->chart()->margins();
    margins.setTop(arg1);
    ui->chartView->chart()->setMargins(margins);
}

void MainWindow::on_sboxRight_valueChanged(int arg1)
{//设置图表：右边距
    QMargins margins = ui->chartView->chart()->margins();
    margins.setRight(arg1);
    ui->chartView->chart()->setMargins(margins);
}

void MainWindow::on_sboxBottom_valueChanged(int arg1)
{//设置图表：下边距
    QMargins margins = ui->chartView->chart()->margins();
    margins.setBottom(arg1);
    ui->chartView->chart()->setMargins(margins);
}

void MainWindow::on_comboBox_currentIndexChanged(int index)
{//设置图表：动画效果
    ui->chartView->chart()->setAnimationOptions((QChart::AnimationOptions)index);
}

void MainWindow::on_comboBox_2_currentIndexChanged(int index)
{//设置图表：背景主题效果
    ui->chartView->chart()->setTheme((QChart::ChartTheme)index);
}

void MainWindow::on_rdoSinLine_clicked()
{//设置序列：当前序列
    m_curSeries = (QLineSeries *)ui->chartView->chart()->series().at(0);
}

void MainWindow::on_rdoCosLine_clicked()
{//设置序列：当前序列
    m_curSeries = (QLineSeries *)ui->chartView->chart()->series().at(1);
}

void MainWindow::on_rdoLineName_textChanged(const QString &arg1)
{//设置序列：序列名称
    m_curSeries->setName(arg1);
}

void MainWindow::on_chkSeriesVisible_stateChanged(int arg1)
{//设置序列：序列可见
    if (Qt::Checked == arg1)
        m_curSeries->setVisible(true);
    else
        m_curSeries->setVisible(false);
}

void MainWindow::on_rdoDataPointVisible_stateChanged(int arg1)
{//设置序列：数据点可见
    if (Qt::Checked == arg1)
        m_curSeries->setPointsVisible(true);
    else
        m_curSeries->setPointsVisible(false);
}
void MainWindow::on_sliderOpacity_valueChanged(int value)
{//设置序列：序列(曲线)透明度
    m_curSeries->setOpacity(value / 100.0);
}

void MainWindow::on_btnLineColor_clicked()
{//设置序列：序列(曲线)颜色
    QPen pen = m_curSeries->pen();
    QColor initialColor = pen.color();
    initialColor = QColorDialog::getColor(initialColor);
    pen.setColor(initialColor);
    m_curSeries->setPen(pen);
}

void MainWindow::on_chkDataPointLableVisible_stateChanged(int arg1)
{//设置序列：数据点标签可见
    if (Qt::Checked == arg1)
        m_curSeries->setPointLabelsVisible(true);
    else
        m_curSeries->setPointLabelsVisible(false);
}

void MainWindow::on_btnDataPointLabelColor_clicked()
{//设置序列：数据点 标签颜色
    QColor initialColor = m_curSeries->pointLabelsColor();
    initialColor = QColorDialog::getColor(initialColor);
    m_curSeries->setPointLabelsColor(initialColor);
}

void MainWindow::on_btnDataPointLabelFont_clicked()
{//设置序列：数据点 标签字体
    QFont initialFont = m_curSeries->pointLabelsFont();
    bool ok = false;
    QFont font = QFontDialog::getFont(&ok, initialFont);
    if (ok)
        m_curSeries->setPointLabelsFont(font);
}

void MainWindow::on_rdoFormatY_clicked()
{//设置序列：数据点 标签格式 @yPoint
    m_curSeries->setPointLabelsFormat(ui->rdoFormatY->text());
}

void MainWindow::on_rdoFormatXY_clicked()
{//设置序列：数据点 标签格式 (@xPoint,@yPoint)
    m_curSeries->setPointLabelsFormat(ui->rdoFormatXY->text());
}

void MainWindow::on_rdoAxisX_clicked()
{//设置坐标轴：选择当前操作的坐标轴
    m_curAxis = (QValueAxis *)ui->chartView->chart()->axisX();
}

void MainWindow::on_rdoAxisY_clicked()
{//设置坐标轴：选择当前操作的坐标轴
    m_curAxis = (QValueAxis *)ui->chartView->chart()->axisY();
}

void MainWindow::on_sboxMin_valueChanged(int arg1)
{//设置坐标轴：坐标轴最小值改变
    m_curAxis->setMin(arg1);
}

void MainWindow::on_sboxMax_valueChanged(int arg1)
{//设置坐标轴：坐标轴最大值改变
    if (m_curAxis->max() != arg1)
        m_curAxis->setMax(arg1);
}

void MainWindow::on_chkAxisVisible_stateChanged(int arg1)
{//设置坐标轴：轴可见
    if (Qt::Checked == arg1)
        m_curAxis->setVisible(true);
    else
        m_curAxis->setVisible(false);
}

void MainWindow::on_lEditAxisTitle_textChanged(const QString &arg1)
{//设置坐标轴：轴标题设置
    m_curAxis->setTitleText(arg1);
}

void MainWindow::on_chkAxisLabelVisible_stateChanged(int arg1)
{//设置坐标轴：轴标签可见
    if (Qt::Checked == arg1)
        m_curAxis->setLabelsVisible(true);
    else
        m_curAxis->setLabelsVisible(false);
}

void MainWindow::on_lEditAxisLabelFormat_textChanged(const QString &arg1)
{//设置坐标轴：轴刻度标签 标签格式
    m_curAxis->setLabelFormat(arg1);
}

void MainWindow::on_btnAxisTitleTextColor_clicked()
{//设置坐标轴：轴刻度标签 文字颜色
    QColor initialColor = m_curAxis->labelsColor();
    initialColor = QColorDialog::getColor(initialColor);
    m_curAxis->setLabelsColor(initialColor);
}

void MainWindow::on_btnAxisTitleTextFont_clicked()
{//设置坐标轴：轴刻度标题 设置字体
    QFont initialFont = m_curAxis->titleFont();
    bool ok = false;
    QFont font = QFontDialog::getFont(&ok, initialFont);
    if (ok)
        m_curAxis->setTitleFont(font);
}

void MainWindow::on_btnAxisLabelFont_clicked()
{//设置坐标轴：轴刻度标签 设置字体
    QFont initialFont = m_curAxis->labelsFont();
    bool ok = false;
    QFont font = QFontDialog::getFont(&ok, initialFont);
    if (ok)
        m_curAxis->setLabelsFont(font);
}

void MainWindow::on_chkGridLineVisible_stateChanged(int arg1)
{//设置网格：网格线可见
    if (Qt::Checked == arg1)
        m_curAxis->setGridLineVisible(true);
    else
        m_curAxis->setGridLineVisible(false);
}

void MainWindow::on_btnGridLineColor_clicked()
{//设置网格：网格线颜色
    QColor initialColor = m_curAxis->gridLineColor();
    initialColor = QColorDialog::getColor(initialColor);
    m_curAxis->setGridLineColor(initialColor);
}

void MainWindow::on_btnGridLinePen_clicked()
{//设置网格：网格线画笔
    //QPen(const QBrush &brush, qreal width, Qt::PenStyle style = Qt::SolidLine,
    //Qt::PenCapStyle cap = Qt::SquareCap, Qt::PenJoinStyle join = Qt::BevelJoin)
}

void MainWindow::on_btnTickVisible_stateChanged(int arg1)
{//设置网格：主刻度 主刻度可见
    if (Qt::Checked == arg1)
        m_curAxis->setLineVisible(true);
    else
        m_curAxis->setLineVisible(false);
}

void MainWindow::on_spinTickCount_valueChanged(int arg1)
{//设置网格：主刻度 主刻度个数
    m_curAxis->setTickCount(arg1);
}

void MainWindow::on_btnTickLinePen_clicked()
{//设置网格：主刻度 主刻度画笔设置
    //QPen(const QBrush &brush, qreal width, Qt::PenStyle style = Qt::SolidLine,
    //Qt::PenCapStyle cap = Qt::SquareCap, Qt::PenJoinStyle join = Qt::BevelJoin)
}

void MainWindow::on_btnTickLinePenColor_clicked()
{//设置网格：主刻度 主刻度画笔颜色设置
    QColor initialColor = m_curAxis->linePenColor();
    initialColor = QColorDialog::getColor(initialColor);
    m_curAxis->setLinePenColor(initialColor);
}

void MainWindow::on_chkMinorTickVisible_stateChanged(int arg1)
{//设置网格：次刻度 此刻度可见
    if (Qt::Checked == arg1)
        m_curAxis->setMinorGridLineVisible(true);
    else
        m_curAxis->setMinorGridLineVisible(false);
}

void MainWindow::on_spinMinorTickCount_valueChanged(int arg1)
{//设置网格：次刻度 此刻度个数
    m_curAxis->setMinorTickCount(arg1);
}

void MainWindow::on_btnMinorTickLineColor_clicked()
{//设置网格：次刻度 此刻度线条颜色
    QColor initialColor = m_curAxis->minorGridLineColor();
    initialColor = QColorDialog::getColor(initialColor);
    m_curAxis->setMinorGridLineColor(initialColor);
}

void MainWindow::on_btnMinorTickLinePen_clicked()
{//设置网格：次刻度 次刻度画笔设置
    //QPen(const QBrush &brush, qreal width, Qt::PenStyle style = Qt::SolidLine,
    //Qt::PenCapStyle cap = Qt::SquareCap, Qt::PenJoinStyle join = Qt::BevelJoin)
}

void MainWindow::onRefresh(bool checked)
{//刷新
    ui->chartView->chart()->update();
}

void MainWindow::onZoomIn(bool checked)
{//放大
    ui->chartView->chart()->zoom(1.2);
}

void MainWindow::onZoomOut(bool checked)
{//缩小
    ui->chartView->chart()->zoom(0.8);
}

void MainWindow::onOriginSize(bool checked)
{//恢复原始大小
    ui->chartView->chart()->zoomReset();
}

void MainWindow::onAreaZoomIn(bool checked)
{//区域放大
    //ui->chartView->chart()->zoomIn();
}

void MainWindow::onQuit(bool checked)
{//退出
    QApplication::quit();
}
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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468