pyqt5实现嵌入图片并放大缩小.rar

from PyQt5.QtCore import pyqtSlot from PyQt5.QtWidgets import * from PyQt5 import QtCore,QtWidgets from PyQt5.QtGui import * import cv2 from Ui_picshow import Ui_MainWindow from PyQt5.Qt import QPixmap, QPoint, Qt, QPainter, QIcon class ImageBox(QWidget): def __init__(self): super(ImageBox, self).__init__() self.img = None self.scaled_img = None self.point = QPoint(0, 0) self.start_pos = None self.end_pos = None self.left_click = False self.scale = 1 def set_image(self, img_path): self.img = QPixmap(img_path) self.scaled_img = self.img def paintEvent(self, e): if self.scaled_img: painter = QPainter() painter.begin(self) painter.scale(self.scale, self.scale) painter.drawPixmap(self.point, self.scaled_img) painter.end() def wheelEvent(self, event): angle = event.angleDelta() / 8 # 返回QPoint对象，为滚轮转过的数值，单位为1/8度 angleY = angle.y() # 获取当前鼠标相对于view的位置 if angleY > 0: self.scale *= 1.1 else: # 滚轮下滚 self.scale *= 0.9 self.adjustSize() self.update() def mouseMoveEvent(self, e): if self.left_click: self.end_pos = e.pos() - self.start_pos self.point = self.point + self.end_pos self.start_pos = e.pos() self.repaint() def mousePressEvent(self, e): if e.button() == Qt.LeftButton: self.left_click = True self.start_pos = e.pos() def mouseReleaseEvent(self, e): if e.button() == Qt.LeftButton: self.left_click = False class picturezoom(QMainWindow, Ui_MainWindow): """ Class documentation goes here. """ def __init__(self, parent=None): super(picturezoom, self).__init__(parent) self.setupUi(self) self.pushButton.clicked.connect(self.openfile) self.box = ImageBox() def openfile(self): ok,f=QFileDialog.getOpenFileNames(self,'打开','/','jpg(*.jpg)') img=cv2.imread(ok[0]) #读取图像 img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB) #转换图像通道 x = img.shape[1] #获取图像大小 y = img.shape[0] self.zoomscale=1 #图片放缩尺度 frame = QImage(img, x, y, QImage.Format_RGB888) pix = QPixmap.fromImage(frame) self.item=QGraphicsPixmapItem(pix) #创建像素图元 #self.item.setScale(self.zoomscale) self.scene=QGraphicsScene() #创建场景 self.scene.addItem(self.item) self.graphicsView.setScene(self.scene) self.pushButton_3.clicked.connect(self.on_zoomin_clicked) self.pushButton_2.clicked.connect(self.on_zoomout_clicked) # self.box.set_image(ok[0]) # QtCore.QMetaObject.connectSlotsByName(self) return # @pyqtSlot() def on_zoomin_clicked(self): """ 点击缩小图像 """ # TODO: not implemented yet self.zoomscale=self.zoomscale-0.05 if self.zoomscale<=0: self.zoomscale=0.2 self.item.setScale(self.zoomscale) #缩小图像 return # @pyqtSlot() def on_zoomout_clicked(self): """ 点击方法图像 """ # TODO: not implemented yet self.zoomscale=self.zoomscale+0.05 if self.zoomscale>=1.2: self.zoomscale=1.2 self.item.setScale(self.zoomscale) #放大图像 return if __name__ == '__main__': import sys app = QApplication(sys.argv) piczoom =picturezoom() piczoom.show() app.exec_()