一 代码
import tkinter import tkinter.filedialog import os from PIL importImageGrab from time import sleep root = tkinter.Tk() root.geometry('100x40+400+300') root.resizable(False,False) classMyCapture: def __init__(self, png): #变量X和Y用来记录鼠标左键按下的位置 self.X = tkinter.IntVar(value=0) self.Y = tkinter.IntVar(value=0) #屏幕尺寸 screenWidth = root.winfo_screenwidth() screenHeight = root.winfo_screenheight() #创建顶级组件容器 self.top = tkinter.Toplevel(root, width=screenWidth, height=screenHeight) #不显示最大化、最小化按钮 self.top.overrideredirect(True) self.canvas = tkinter.Canvas(self.top,bg='white', width=screenWidth, height=screenHeight) #显示全屏截图,在全屏截图上进行区域截图 self.image = tkinter.PhotoImage(file=png) self.canvas.create_image(screenWidth//2, screenHeight//2, image=self.image) #鼠标左键按下的位置 def onLeftButtonDown(event): self.X.set(event.x) self.Y.set(event.y) #开始截图 self.sel =True self.canvas.bind('<Button-1>', onLeftButtonDown) #鼠标左键移动,显示选取的区域 def onLeftButtonMove(event): ifnot self.sel: return global lastDraw try: #删除刚画完的图形,要不然鼠标移动的时候是黑乎乎的一片矩形 self.canvas.delete(lastDraw) exceptExceptionas e: pass lastDraw = self.canvas.create_rectangle(self.X.get(), self.Y.get(), event.x, event.y, outline='black') self.canvas.bind('<B1-Motion>', onLeftButtonMove) #获取鼠标左键抬起的位置,保存区域截图 def onLeftButtonUp(event): self.sel =False try: self.canvas.delete(lastDraw) exceptExceptionas e: pass sleep(0.1) #考虑鼠标左键从右下方按下而从左上方抬起的截图 left, right = sorted([self.X.get(), event.x]) top, bottom = sorted([self.Y.get(), event.y]) pic =ImageGrab.grab((left+1, top+1, right, bottom)) #弹出保存截图对话框 fileName = tkinter.filedialog.asksaveasfilename(title='保存截图', filetypes=[('image','*.jpg *.png')]) if fileName: pic.save(fileName) #关闭当前窗口 self.top.destroy() self.canvas.bind('<ButtonRelease-1>', onLeftButtonUp) self.canvas.pack(fill=tkinter.BOTH, expand=tkinter.YES) #开始截图 def buttonCaptureClick(): #最小化主窗口 root.state('icon') sleep(0.2) filename ='temp.png' im =ImageGrab.grab() im.save(filename) im.close() #显示全屏幕截图 w =MyCapture(filename) buttonCapture.wait_window(w.top) #截图结束,恢复主窗口,并删除临时的全屏幕截图文件 root.state('normal') os.remove(filename) buttonCapture = tkinter.Button(root, text='截图', command=buttonCaptureClick) buttonCapture.place(x=10, y=10, width=80, height=20) #启动消息主循环 root.mainloop()
二 运行结果