set the background grid for both the x and y axis

Author: dsarvan

pyqtplot08.png

@@ -0,0 +1,81 @@
+#!/usr/bin/env python
+# File: pyqtplot08.py
+# Name: D.Saravanan
+# Date: 14/07/2023
+
+""" Script to create plot using the PlotWidget in PyQtGraph """
+
+import sys
+
+import pyqtgraph as pg
+from PyQt6 import QtCore, QtWidgets
+
+
+class MainWindow(QtWidgets.QMainWindow):
+    """Subclass of QMainWindow to customize application's main window."""
+
+    def __init__(self, hour, temperature):
+        super().__init__()
+
+        # set the size parameters (width, height) pixels
+        self.setFixedSize(QtCore.QSize(640, 480))
+
+        # set the central widget of the window
+        self.graphWidget = pg.PlotWidget()
+        self.setCentralWidget(self.graphWidget)
+
+        # set the background color using hex notation #121317 as string
+        self.graphWidget.setBackground("#121317")
+
+        # set the main plot title, text color, text size, text weight, text style
+        self.graphWidget.setTitle(
+            "Temperature Plot", color="#dcdcdc", size="10pt", bold=True, italic=False
+        )
+
+        # set the axis labels (position and text), style parameters
+        styles = {"color": "#dcdcdc", "font-size": "10pt"}
+        self.graphWidget.setLabel(
+            "left", "Temperature", units="\N{DEGREE SIGN}C", **styles
+        )
+        self.graphWidget.setLabel("bottom", "Hour", units="H", **styles)
+
+        # set the legend which represents given line
+        self.graphWidget.addLegend()
+
+        # set the background grid for both the x and y axis
+        self.graphWidget.showGrid(x=True, y=True)
+
+        # set the line color in 3-tuple of int values, line width in pixels, line style
+        lvalue = pg.mkPen(
+            color=(220, 220, 220), width=1, style=QtCore.Qt.PenStyle.SolidLine
+        )
+
+        # plot data: x, y values with lines drawn using Qt's QPen types & marker '+'
+        self.graphWidget.plot(
+            hour,
+            temperature,
+            name="Sensor 1",
+            pen=lvalue,
+            symbol="+",
+            symbolSize=8,
+            symbolBrush=("r"),
+        )
+
+
+def main():
+    """Need one (and only one) QApplication instance per application.
+    Pass in sys.argv to allow command line arguments for the application.
+    If no command line arguments than QApplication([]) is required."""
+    app = QtWidgets.QApplication(sys.argv)
+
+    hour = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+    temperature = [30, 32, 34, 32, 33, 31, 29, 32, 35, 45]
+
+    window = MainWindow(hour, temperature)  # an instance of the class MainWindow
+    window.show()  # windows are hidden by default
+
+    sys.exit(app.exec())  # start the event loop
+
+
+if __name__ == "__main__":
+    main()