Merge pull request #42 from yimelia/master

添加基于QCharts的动态曲线图示例

Author: 892768447

Diff for: QChart/DynamicSpline.py

@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2019年5月5日
+@author: Yimelia
+@site: https://github.com/yimelia
+@file: DynamicSpline
+@description: This example shows how to draw dynamic data. https://doc.qt.io/qt-5/qtcharts-dynamicspline-example.html
+"""
+import sys
+
+from PyQt5.QtCore import Qt, QTimer, QRandomGenerator
+from PyQt5.QtChart import QChartView, QLineSeries, QChart, QSplineSeries, QValueAxis
+from PyQt5.QtGui import QPainter, QPen
+from PyQt5.QtWidgets import QApplication
+
+
+__version__ = "0.0.1"
+
+
+class DynamicSpline(QChart):
+    def __init__(self):
+        super().__init__()
+        self.m_step = 0
+        self.m_x = 5
+        self.m_y = 1
+        # 初始化图像
+        self.series = QSplineSeries(self)
+        green_pen = QPen(Qt.red)
+        green_pen.setWidth(3)
+        self.series.setPen(green_pen)
+        self.axisX = QValueAxis()
+        self.axisY = QValueAxis()
+        self.series.append(self.m_x, self.m_y)
+
+        self.addSeries(self.series)
+        self.addAxis(self.axisX, Qt.AlignBottom)
+        self.addAxis(self.axisY, Qt.AlignLeft)
+        self.series.attachAxis(self.axisX)
+        self.series.attachAxis(self.axisY)
+        self.axisX.setTickCount(5)
+        self.axisX.setRange(0, 10)
+        self.axisY.setRange(-5, 10)
+
+        self.timer = QTimer(self)
+        self.timer.setInterval(1000)
+        self.timer.timeout.connect(self.handleTimeout)
+        self.timer.start()
+
+    def handleTimeout(self):
+        x = self.plotArea().width() / self.axisX.tickCount()
+        y = (self.axisX.max() - self.axisX.min()) / self.axisX.tickCount()
+        self.m_x += y
+        # 在PyQt5.11.3及以上版本中，QRandomGenerator.global()被重命名为global_()
+        self.m_y = QRandomGenerator.global_().bounded(5) - 2.5
+        self.series.append(self.m_x, self.m_y)
+        self.scroll(x, 0)
+        if self.m_x >= 100:
+            self.timer.stop()
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    chart = DynamicSpline()
+    chart.setTitle("Dynamic spline chart")
+    chart.legend().hide()
+    chart.setAnimationOptions(QChart.AllAnimations)
+
+    view = QChartView(chart)
+    view.setRenderHint(QPainter.Antialiasing)  # 抗锯齿
+    view.resize(400, 300)
+    view.show()
+    sys.exit(app.exec_())

Diff for: QChart/README.md

@@ -34,4 +34,9 @@
 ## 5、ToolTip提示
 [运行 ToolTip.py](ToolTip.py) | [运行 ToolTip2.py](ToolTip2.py) 
 
-![ToolTip](ScreenShot/ToolTip.gif) ![ToolTip2](ScreenShot/ToolTip2.gif)
+![ToolTip](ScreenShot/ToolTip.gif) ![ToolTip2](ScreenShot/ToolTip2.gif)
+
+## 6、动态曲线图
+[运行 DynamicSpline.py](DynamicSpline.py)
+
+![DynamicSpline](ScreenShot/DynamicSplineChart.gif)

Diff for: QChart/ScreenShot/DynamicSplineChart.gif

@@ -135,6 +135,7 @@ https://pyqt5.com 社区是专门针对PyQt5学习和提升开设的博客网站
   - [柱状堆叠图](QChart/BarStack.py)
   - [LineChart自定义xy轴](QChart/CustomXYaxis.py)
   - [ToolTip提示](QChart/ToolTip.py)
+  - [DynamicSpline动态曲线图](QChart/DynamicSpline.py)
 
 - [Qpyqtgraph](Qpyqtgraph)
   - [鼠标获取X轴坐标](Qpyqtgraph/mouseFlow.py)