canvas中的控件

canvas中所有控件定义生成好后，后加pack/grid/place，加以显示。
用tkinter.pack设计复杂界面布局

生成canvas

 def showCanvas(self): #显示画布         self.canvas_1 = tkinter.Canvas(width=500,height=50,bg="red")         self.canvas_1.pack(side='top',expand='no',fill='x')          self.canvas_2 = tkinter.Canvas(width=100,height=100,bg='yellow')         self.canvas_2.pack(side='left',anchor='nw',fill='y')          self.canvas_3 = tkinter.Canvas(bg='white')         self.canvas_3.pack(side='left',expand='yes',fill='both',padx=5,pady=5) 

button

生成对象 = tkinter.Button（画布,长,宽,command,image）
command和bind用来绑定控件的功能函数

#####文件的路径######### C_PATH = "F:\py_pro\electricBox\venv\log\CC.png" R_PATH = "F:\py_pro\electricBox\venv\log\RR.png" L_PATH = "F:\py_pro\electricBox\venv\log\LL.png" def addButton(self):         photo_C = tkinter.PhotoImage(file=C_PATH)         self.button_show_R = tkinter.Button(self.canvas,width=100,height=50,image=photo_C).pack(side='top')         photo_R = tkinter.PhotoImage(file=R_PATH)         self.button_show_R = tkinter.Button(self.canvas,width=100,height=50,image=photo_R).pack(side='top')         photo_L = tkinter.PhotoImage(file=L_PATH)         self.button_show_R = tkinter.Button(self.canvas,width=100,height=50,image=photo_L).pack(side='top') 

控件Button和其他控件都可以插入图片

Label

 def addLabel(self):         self.Label1 = tkinter.Label(self.canvas_1,width=50,foreground='blue',text='Input information：')         self.Label1.pack(side='left') 

Entry

简单的文本框输入，以“回车”触发

 def getEntry(self):         self.input_var = tkinter.StringVar()         self.inputEntry = tkinter.Entry(self.canvas,textvariable=self.input_var)         self.inputEntry.bind('<Return>',self.Analysis_Creat)         self.inputEntry.pack(side='left') 

combox

下拉框默认可以在框里输入信息，将state设为“readonly”，即没有输入信息的功能

 def combox(self):         self.comboxText = tkinter.StringVar()         self.combox = tkinter.ttk.Combobox(self.canvas,width=10,textvariable=self.comboxText,state='readonly')         self.combox['value'] = ('电阻','电容','电感','短路','断路')         self.combox.pack(side= 'left') 

画布中画直线

在画布中，用鼠标画直线，

 ##################   Start  canvas中画线    ############################ def paintLine(self):         self.canvas.bind('<Button-1>',self.getStartPosition)         self.canvas.bind('<ButtonRelease-1>', self.getEndPosition) def getStartPosition(self,event):         self.x_Start_position = event.x         self.y_Start_position = event.y         print(self.x_Start_position,self.y_Start_position) def getEndPosition(self,event):         self.x_End_position = event.x         self.y_End_position = event.y         print(self.x_End_position, self.y_End_position) if abs(self.x_End_position - self.x_Start_position) > abs(self.y_End_position - self.y_Start_position):             self.line1 = self.canvas.create_line(self.x_Start_position,self.y_Start_position,                                            self.x_End_position,self.y_Start_position) else:             self.line1 = self.canvas.create_line(self.x_Start_position,self.y_Start_position,                                            self.x_Start_position,self.y_End_position)