PyQT5开发之参数化调节模糊

  1import cv2 as cv
  2from PyQt5 import QtWidgets, QtCore, QtGui
  3import sys
  4
  5
  6class SpinBoxComBoxDemoPanel(QtWidgets.QWidget):
  7    def __init__(self, parent=None):
  8        super().__init__(parent)
  9        # 文本标签
 10        self.combox = QtWidgets.QComboBox()
 11        self.combox.addItem("原图")
 12        self.combox.addItem("模糊")
 13        self.combox.addItem("灰度")
 14        self.combox.setCurrentIndex(0)
 15
 16        hbox_layout1 = QtWidgets.QHBoxLayout()
 17        hbox_layout1.addWidget(QtWidgets.QLabel("选择:"))
 18        hbox_layout1.addWidget(self.combox)
 19        hbox_layout1.addStretch(1)
 20
 21        panel1 = QtWidgets.QGroupBox("单选演示")
 22        panel1.setLayout(hbox_layout1)
 23
 24        self.spinbox1 = QtWidgets.QSpinBox()
 25        self.spinbox1.setRange(0, 100)
 26        self.spinbox1.setSingleStep(1)
 27        self.spinbox2 = QtWidgets.QSpinBox()
 28        self.spinbox2.setRange(3, 50)
 29        self.spinbox2.setSingleStep(2)
 30
 31        hbox_layout2 = QtWidgets.QHBoxLayout()
 32        hbox_layout2.addWidget(QtWidgets.QLabel("窗口:"))
 33        hbox_layout2.addWidget(self.spinbox1)
 34        hbox_layout2.addWidget(QtWidgets.QLabel("方差:"))
 35        hbox_layout2.addWidget(self.spinbox2)
 36        hbox_layout2.addStretch(1)
 37
 38        panel2 = QtWidgets.QGroupBox("高斯模糊参数")
 39        panel2.setLayout(hbox_layout2)
 40
 41        panel3 = QtWidgets.QWidget()
 42        hbox_layout3 = QtWidgets.QHBoxLayout()
 43        hbox_layout3.addWidget(panel1)
 44        hbox_layout3.addWidget(panel2)
 45        panel3.setLayout(hbox_layout3)
 46
 47        # 输入文本框
 48        self.label = QtWidgets.QLabel()
 49        pixmap = QtGui.QPixmap("images/16.jpg")
 50        pix = pixmap.scaled(QtCore.QSize(620, 500), QtCore.Qt.KeepAspectRatio)
 51        self.label.setPixmap(pix)
 52        self.label.setAlignment(QtCore.Qt.AlignCenter)
 53        self.label.setStyleSheet("background-color:black; color: green")
 54
 55        # 添加到布局管理器中
 56        vbox_layout = QtWidgets.QVBoxLayout()
 57        vbox_layout.addWidget(panel3)
 58        vbox_layout.addWidget(self.label)
 59        vbox_layout.addStretch(1)
 60
 61        self.spinbox1.setEnabled(False)
 62        self.spinbox2.setEnabled(False)
 63
 64        # 面板容器
 65        self.setLayout(vbox_layout)
 66
 67        # setup listener
 68        self.combox.currentIndexChanged.connect(self.on_select_changed)
 69        self.spinbox2.valueChanged.connect(self.on_update_blur)
 70
 71    def on_select_changed(self):
 72        index = self.combox.currentIndex()
 73        self.spinbox1.setEnabled(False)
 74        self.spinbox2.setEnabled(False)
 75        if index == 0:
 76            self.on_update_original()
 77        if index == 1:
 78            self.spinbox1.setEnabled(True)
 79            self.spinbox2.setEnabled(True)
 80            self.on_update_blur()
 81        if index == 2:
 82            self.on_update_gray()
 83
 84    def on_update_original(self):
 85        pixmap = QtGui.QPixmap("images/16.jpg")
 86        pix = pixmap.scaled(QtCore.QSize(620, 500), QtCore.Qt.KeepAspectRatio)
 87        self.label.setPixmap(pix)
 88
 89    def on_update_blur(self):
 90        image = cv.imread("images/16.jpg")
 91        sigma = self.spinbox2.value()
 92        win_size = self.spinbox1.value()
 93        bgr = cv.GaussianBlur(image, (win_size, win_size), sigma)
 94        dst = cv.cvtColor(bgr, cv.COLOR_BGR2RGB)
 95        height, width, channel = dst.shape
 96        bytesPerLine = 3 * width
 97        img = QtGui.QImage(dst.data, width, height, bytesPerLine, QtGui.QImage.Format_RGB888)
 98        pixmap = QtGui.QPixmap(img)
 99        pix = pixmap.scaled(QtCore.QSize(620, 500), QtCore.Qt.KeepAspectRatio)
100        self.label.setPixmap(pix)
101
102    def on_update_gray(self):
103        image = cv.imread("images/16.jpg")
104        gray = cv.cvtColor(image, cv.COLOR_BGR2GRAY)
105        dst = cv.cvtColor(gray, cv.COLOR_GRAY2RGB)
106        height, width, channel = dst.shape
107        bytesPerLine = 3 * width
108        img = QtGui.QImage(dst.data, width, height, bytesPerLine, QtGui.QImage.Format_RGB888)
109        pixmap = QtGui.QPixmap(img)
110        pix = pixmap.scaled(QtCore.QSize(620, 500), QtCore.Qt.KeepAspectRatio)
111        self.label.setPixmap(pix)

本文主要是演示了PyQT5的QSpinBox与QComboBox两种控件使用，从创建、Group方式排版布局，事件响应处理等等细节全面介绍了它们的使用。

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