GUI----简易画图项目

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"""  开发画图软件 """
# -*- coding：utf-8 -*-
from tkinter import *
from tkinter.colorchooser import *
from tkinter.filedialog import *
from tkinter.messagebox 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
        self.startDrawFlag = False
        self.pack()
        self.createWidget()

    def createWidget(self):
        # 创建绘图区
        self.drawpad = Canvas(root, width=win_width, height=win_height*0.9, bg=self.bgcolor)
        self.drawpad.pack()
        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_earsor = Button(root, text="橡皮擦", name="earsor")
        btn_earsor.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_rect.bind_class("Button", "<1>", self.eventManager)
        self.drawpad.bind("<ButtonRelease-1>", self.stopDraw)
         # 增加颜色切换的快捷键
        root.bind("<KeyPress-r>", self.kuaijiejian)
        root.bind("<KeyPress-g>", self.kuaijiejian)
        root.bind("<KeyPress-y>", self.kuaijiejian)


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

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


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

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

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

if __name__ == '__main__':
    root = Tk();root.geometry(str(win_width)+"x"+str(win_height)+"+200+300")
    root.title("Mr_huang的简易画图板")
    app = Application(master=root)
    root.mainloop()