python pyqt5(鼠标左键画图，右键移动图片，滚轮控制图片放缩)
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2023-11-10 10:16:58
import sysimport osfrom PyQt5 import QtWidgets,QtCore,QtGui,Qt import cv2.cv2 as cv class MainWindow(QtWidgets.QWidget): def __init__(self): super().__init__() self.initUI() self.path = "" self.cur_img = ""...
鼠标左键画图，右键移动图片
import sys
import os
from PyQt5 import QtWidgets,QtCore,QtGui,Qt
import cv2.cv2 as cv
class MainWindow(QtWidgets.QWidget):
def __init__(self):
super().__init__()
self.initUI()
self.path = ""
self.cur_img = ""
self.img_w = ""
self.img_h = ""
self.left_flag = False
self.right_flag = False
self.label_x = 0 #label当前坐标
self.label_y = 0
self.mouse_mv_x = "" #鼠标移动上一次坐标
self.mouse_mv_y = ""
self.x1 = ""
self.y1 = ""
self.last_x = "" #画画上一个点坐标
self.last_y = ""
self.mouse_mv_x1 = "" #中转点
self.mouse_mv_y1 = ""
def initUI(self):
self.setGeometry(300, 200, 580, 430)
self.setWindowTitle('Hello')
self.pushbutton = QtWidgets.QPushButton(self)
self.pushbutton.setGeometry(0, 0, 100, 30)
self.pushbutton.clicked.connect(self.open_pic)
self.pushbutton.setText("选择图片")
self.groupbox = QtWidgets.QGroupBox(self)
self.groupbox.setGeometry(0, 30, 580, 400)
self.label = QtWidgets.QLabel(self.groupbox)
self.label.setGeometry(0, 0, 580, 400)
#打开一个图片文件
def open_pic(self):
self.path = Qt.QFileDialog.getOpenFileName()
self.cur_img = cv.imread(self.path[0])
self.img_w = 580
self.img_h = 400
#self.cur_img = cv.cvtColor(self.cur_img, cv.COLOR_BGR2RGB)
self.label.setPixmap(QtGui.QPixmap(self.path[0]).scaled(self.img_w,self.img_h)) #在label中显示图片
#鼠标左击事件
def mousePressEvent(self,event):
if event.buttons() == QtCore.Qt.LeftButton:
self.left_flag = True
if event.buttons() == QtCore.Qt.RightButton:
self.right_flag = True
#鼠标释放事件
def mouseReleaseEvent(self,event):
self.left_flag = False
self.right_flag = False
self.mouse_mv_y = ""
self.mouse_mv_x = ""
self.last_x = ""
self.last_y = ""
#鼠标移动事件
def mouseMoveEvent(self,event):
if self.left_flag: #鼠标左击
self.x1 = event.x()
self.y1 = event.y()
mv_x = int((self.x1 - self.label_x)*self.cur_img.shape[1]/580)
mv_y = int((self.y1 - 30 - self.label_y)*self.cur_img.shape[0]/400)
cv.circle(self.cur_img,(mv_x, mv_y), 4, (0,0,0), -1)
if self.last_x != "" and self.last_y != "":
#if self.mouse_mv_x != "" and self.mouse_mv_y != "":
cv.line(self.cur_img,(int((self.last_x-self.label_x) *self.cur_img.shape[1]/580),int((self.last_y-self.label_y - 30)*self.cur_img.shape[0]/400)),(int((self.x1-self.label_x) *self.cur_img.shape[1]/580),int((self.y1 -self.label_y- 30)*self.cur_img.shape[0]/400)),(0,0,0),8)
#elif self.mouse_mv_x == "" and self.mouse_mv_y == "":
# cv.line(self.cur_img,(int(self.last_x*self.cur_img.shape[1]/580),int((self.last_y - 30)*self.cur_img.shape[0]/400)),(int(self.x1*self.cur_img.shape[1]/580),int((self.y1-30)*self.cur_img.shape[0]/400)),(0,0,0),8)
self.last_x = self.x1
self.last_y = self.y1
img2 = cv.cvtColor(self.cur_img, cv.COLOR_BGR2RGB)
QImage = QtGui.QImage(img2, self.cur_img.shape[1], self.cur_img.shape[0],3*self.cur_img.shape[1],QtGui.QImage.Format_RGB888)
pixmap = QtGui.QPixmap(QImage).scaled(self.label.width(),self.label.height())
self.label.setPixmap(pixmap)
if self.right_flag: #鼠标右击
self.x1 = event.x()
self.y1 = event.y()
if self.mouse_mv_x != "" and self.mouse_mv_y != "":
self.label_x = self.label_x + (self.x1 - self.mouse_mv_x)
self.label_y = self.label_y + (self.y1 - self.mouse_mv_y)
self.mouse_mv_x = self.x1
self.mouse_mv_y = self.y1
self.label.setGeometry(self.label_x, self.label_y, 580, 400)
if __name__ == '__main__':
app=QtWidgets.QApplication(sys.argv)
win=MainWindow()
win.show()
sys.exit(app.exec_())
滚轮控制图片放缩
import sys
import os
from PyQt5 import QtWidgets,QtCore,QtGui,Qt
import cv2.cv2 as cv
class MainWindow(QtWidgets.QWidget):
def __init__(self):
super().__init__()
self.initUI()
self.path = ""
self.cur_img = ""
self.img_w = ""
self.img_h = ""
self.resize_point = 10
self.cur_resimg = ""
def initUI(self):
self.setGeometry(300, 200, 580, 430)
self.setWindowTitle('Hello')
self.pushbutton = QtWidgets.QPushButton(self)
self.pushbutton.setGeometry(0, 0, 100, 30)
self.pushbutton.clicked.connect(self.open_pic)
self.pushbutton.setText("选择图片")
self.groupbox = QtWidgets.QGroupBox(self)
self.groupbox.setGeometry(0, 30, 580, 400)
self.label = QtWidgets.QLabel(self.groupbox)
self.label.setGeometry(0, 0, 580, 400)
def open_pic(self):
self.path = Qt.QFileDialog.getOpenFileName()
self.cur_img = cv.imread(self.path[0])
self.img_w = 580
self.img_h = 400
self.label.setPixmap(QtGui.QPixmap(self.path[0]).scaled(self.img_w,self.img_h))
def wheelEvent(self, event):
self.angle = event.angleDelta( ) /8
self.angleY = self.angle.y()
if self.angleY>0:
if self.resize_point >= 1 and self.resize_point <= 19:
self.resize_point += 1
elif self.angleY<0:
if self.resize_point >= 2 and self.resize_point <= 20:
self.resize_point -= 1
self.cur_resimg = cv.resize(self.cur_img,(int(self.cur_img.shape[1]*self.resize_point/10),int(self.cur_img.shape[0]*self.resize_point/10)))
img2 = cv.cvtColor(self.cur_resimg, cv.COLOR_BGR2RGB)
QImage = QtGui.QImage(img2, self.cur_resimg.shape[1], self.cur_resimg.shape[0],3*self.cur_resimg.shape[1],QtGui.QImage.Format_RGB888)
pixmap = QtGui.QPixmap(QImage).scaled(self.cur_resimg.shape[1],self.cur_resimg.shape[0])
self.label_w = self.cur_resimg.shape[1]
self.label_h = self.cur_resimg.shape[0]
self.label.setGeometry(QtCore.QRect(int((1-self.resize_point/10)*self.cur_resimg.shape[1]/2),int((1-self.resize_point/10)*self.cur_resimg.shape[0]/2),self.label_w,self.label_h))
self.label.setPixmap(pixmap)
if __name__ == '__main__':
app=QtWidgets.QApplication(sys.argv)
win=MainWindow()
win.show()
sys.exit(app.exec_())
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