开发简单的画图程序

"""开发画图软件的菜单"""

from tkinter import *
from tkinter.filedialog import *
from tkinter.colorchooser import *

# 窗口的宽度和高度
win_width = 900
win_height = 450

class Application(Frame):

    def __init__(self, master=None, bgcolor="#000000"):
        super().__init__(master)

        self.master = master
        self.bgcolor = bgcolor
        self.x = 0
        self.y = 0
        self.fgcolor = "#ff0000"
        self.lastDraw = 0  # 表示最后绘制图形的 id
        self.startDrawFlag = False
        self.pack()
        self.create_windget()

    def create_windget(self):
        # 创建绘图区
        self.drawpda = Canvas(root, width=win_width, height=win_height*0.9, bg=self.bgcolor)
        self.drawpda.pack()
        # 创建按钮
        btn_start = Button(root, text="开始", name="start")
        btn_start.pack(side="left", padx="10")
        btn_pen = Button(root, text="画笔", name="pen")
        btn_pen.pack(side="left", padx="10")
        btn_rect = Button(root, text="矩形", name="rect")
        btn_rect.pack(side="left", padx="10")
        btn_clear = Button(root, text="清屏", name="clear")
        btn_clear.pack(side="left", padx="10")
        btn_erasor = Button(root, text="橡皮", name="erasor")
        btn_erasor.pack(side="left", padx="10")
        btn_line = Button(root, text="直线", name="line")
        btn_line.pack(side="left", padx="10")
        btn_lineArrow= Button(root, text="箭头直线", name="lineArrow")
        btn_lineArrow.pack(side="left", padx="10")
        btn_color = Button(root, text="颜色", name="color")
        btn_color.pack(side="left", padx="10")

        # 事件处理
        btn_pen.bind_class("Button", "<1>", self.eventManager)
        self.drawpda.bind("<ButtonRelease-1>", self.stopDraw)

    def eventManager(self, event):
        name = event.widget.winfo_name()
        print(name)
        if name == "line":
            self.drawpda.bind("<B1-Motion>", self.myline)
        elif name == "lineArrow":
            self.drawpda.bind("<B1-Motion>", self.mylineArrow)
        elif name == "rect":
            self.drawpda.bind("<B1-Motion>", self.myRect)
        elif name == "erasor":
            self.drawpda.bind("<B1-Motion>", self.myErasor)
        elif name == "pen":
            self.drawpda.bind("<B1-Motion>", self.myPen)
        elif name == "clear":
            self.drawpda.delete("all")
        elif name == "color":
            c = askcolor(color=self.fgcolor, title="选择画笔颜色")
            self.fgcolor = c[1]  # [(255,0,0),"#ff0000"]

    def startDraw(self, event):
        self.drawpda.delete(self.lastDraw)

        if not self.startDrawFlag:
            self.startDrawFlag = True
            self.x = event.x
            self.y = event.y

    def myline(self, event):
        self.startDraw(event)
        self.lastDraw = self.drawpda.create_line(self.x, self.y, event.x, event.y, fill=self.fgcolor)

    def mylineArrow(self, event):
        self.startDraw(event)
        self.lastDraw = self.drawpda.create_line(self.x, self.y, event.x, event.y, arrow=LAST, fill=self.fgcolor)

    def myRect(self,event):
        self.startDraw(event)
        self.lastDraw = self.drawpda.create_rectangle(self.x, self.y, event.x, event.y, outline=self.fgcolor)

    def myPen(self, event):
        self.startDraw(event)
        self.drawpda.create_line(self.x, self.y, event.x, event.y, fill=self.fgcolor)
        self.x = event.x
        self.y = event.y

    def myErasor(self, event):
        self.startDraw(event)
        self.drawpda.create_rectangle(event.x-4, event.y-4, event.x+4, event.y+4,fill=self.bgcolor)
        self.x = event.x
        self.y = event.y

    def stopDraw(self, event):
        self.startDrawFlag = False
        self.lastDraw = 0

    def kuaijiejian(self, event):
        if event.char == 'r':
            self.fgcolor = "#ff0000"
        elif event.char == 'g':
            self.fgcolor = "#00ff00"
        elif event.char == 'y':
            self.fgcolor = "#ffff00"
        pass

if __name__ == '__main__':
    root = Tk()
    root.geometry(str(win_width)+"x"+str(win_height)+"+200+300")
    root.title("明算软件的画图软件")
    app = Application(master=root)
    root.mainloop()