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This article mainly introduces Python how to achieve a simple GUI program, the article introduces in great detail, has a certain reference value, interested friends must read it!

Notepad

Source code

# python simple notepad from tkinter import * from tkinter import messageboxfrom tkinter import filedialogimport osfilename='' # filename, global variable def about (): messagebox.showinfo ('prompt', 'this is a message box') def openFile (): global filename # use the global variable filename=filedialog.askopenfilename (defaultextension='.txt') # to open the file The default extension is xtxt if filename=='': # if filename=None else: root.title ('FileName:'+os.path.basename (filename)) # displays the file name in the title bar textPad.delete (1.0 end) # removes the original content from the text box f=open (filename,'r') Encoding='UTF-8') # get the contents of the file textPad.insert (1.0Magneto f.read ()) # display to the text box f.close () def saveOtherFile (): global filename f=filedialog.asksaveasfilename (initialfile=' unnamed .txt', defaultextension='.txt') # Save the file filename=f root.title ('FileName:' + os.path.basename (filename)) fh=open (fMagneW`) Encoding='UTF-8') # Open file msg=textPad.get (1.0 menu=menubar end) # get the content from the text box fh.write (msg) fh.close () root=Tk () # set up the menu bar root.title ('notepad') root.geometry ('500x500' 100') # widthxheight+x+ymenubar=Menu (root) root.config (menu=menubar) filemenu=Menu (menubar) # the first menu bar filemenu.add_command (label=' Open', accelerator='Ctrl+N') Command=openFile) filemenu.add_command (label=' save', accelerator='Ctrl+T',command=saveOtherFile) menubar.add_cascade (label=' file', menu=filemenu) aboutmenu=Menu (menubar) aboutmenu.add_command (label=' about', accelerator='Ctrl+Y',command=about) menubar.add_cascade (label=' help', menu=aboutmenu) status=Label (root,text='Ln20',bd=1,relief=SUNKEN,anchor=W) # bottom status bar status.pack (side=BOTTOM,fill=X) lnlabel=Label (root,width=2,bg='antique white') # left border bar lnlabel.pack (side=LEFT) Fill=Y) textPad=Text (root,undo=True) # set text box textPad.pack (expand=YES,fill=BOTH) scroll=Scrollbar (textPad) # right progress bar textPad.config (yscrollcommand=scroll.set) scroll.config (command=textPad.yview) scroll.pack (side=RIGHT,fill=Y) root.mainloop () # python notepad from tkinter import * from tkinter import messageboxfrom tkinter import filedialogimport osfilename='' # file name Global variable def about (): messagebox.showinfo ('prompt', 'this is a message box') def openFile (): global filename # use the global variable filename=filedialog.askopenfilename (defaultextension='.txt') # to open the file The default extension is xtxt if filename=='': # if filename=None else: root.title ('FileName:'+os.path.basename (filename)) # displays the file name in the title bar textPad.delete (1.0 end) # removes the original content from the text box f=open (filename,'r') Encoding='UTF-8') # get the contents of the file textPad.insert (1.0Magneto f.read ()) # display to the text box f.close () def saveOtherFile (): global filename f=filedialog.asksaveasfilename (initialfile=' unnamed .txt', defaultextension='.txt') # Save the file filename=f root.title ('FileName:' + os.path.basename (filename)) fh=open (fMagneW`) Encoding='UTF-8') # Open file msg=textPad.get (1.0 menu=menubar end) # get the content from the text box fh.write (msg) fh.close () root=Tk () # set up the menu bar root.title ('notepad') root.geometry ('500x500' 100') # widthxheight+x+ymenubar=Menu (root) root.config (menu=menubar) filemenu=Menu (menubar) # the first menu bar filemenu.add_command (label=' Open', accelerator='Ctrl+N') Command=openFile) filemenu.add_command (label=' save', accelerator='Ctrl+T',command=saveOtherFile) menubar.add_cascade (label=' file', menu=filemenu) aboutmenu=Menu (menubar) aboutmenu.add_command (label=' about', accelerator='Ctrl+Y',command=about) menubar.add_cascade (label=' help', menu=aboutmenu) status=Label (root,text='Ln20',bd=1,relief=SUNKEN,anchor=W) # bottom status bar status.pack (side=BOTTOM,fill=X) lnlabel=Label (root,width=2,bg='antique white') # left border bar lnlabel.pack (side=LEFT) Fill=Y) textPad=Text (root,undo=True) # set text box textPad.pack (expand=YES,fill=BOTH) scroll=Scrollbar (textPad) # right progress bar textPad.config (yscrollcommand=scroll.set) scroll.config (command=textPad.yview) scroll.pack (side=RIGHT,fill=Y) root.mainloop ()

Running effect:

2. Simple drawing # drawing program import osimport tkinterimport tkinter.simpledialogimport tkinter.colorchooserimport tkinter.filedialogfrom PIL import Imagefrom PIL import ImageGrabdef openItem (): global img filename=tkinter.filedialog.askopenfilename (title= "Open", filetypes= [('Image','*.png *. Gif')]) if filename: img=tkinter.PhotoImage (file=filename) canvas.create_image (400300) Image=img) def saveItem (): saveX=int (root.winfo_rootx ()) saveY=int (root.winfo_rooty () saveW=root.winfo_width () saveH=root.winfo_height () im=ImageGrab.grab ((saveX,saveY,saveX+saveW,saveY+saveH)) filename=tkinter.filedialog.asksaveasfilename (title='Save',filetypes= [('Image') '* .png * .gif')]) if not filename: return try: if filename [filename.index ('.'):] in ['.png' '.gif'] = False: filename+='.png' except: filename+='.png' im.save (filename) def clearItem (): for i in canvas.find_all (): canvas.delete (I) def curveType (): penType.set (1) def lineType (): penType.set (2) def rectangleType (): penType.set (3) def textType (): global userText userText=tkinter.simpledialog.askstring (title= "Please input your words" Prompt='') penType.set (4) def eraseType (): penType.set (5) def chooseForeColor (): global foreColor foreColor=tkinter.colorchooser.askcolor () [1] def chooseBackColor (): global backColor backColor=tkinter.colorchooser.askcolor () [1] def onClickLeft (event): global userText canDraw.set (1) X.set (event.x) Y.set (event.y) if penType.get () = 4: canvas.create_text (event.x,event.y) Text=userText) def onMoveLeft (event): global lastPaint,foreColor,backColor if canDraw.get () = = 0: return if penType.get () = = 1: # draw curve canvas.create_line (X.get (), Y.get (), event.x,event.y) Fill=foreColor) X.set (event.x) Y.set (event.y) elif penType.get () = 2: # draw a line (preview) try: canvas.delete (lastPaint) except: pass lastPaint=canvas.create_line (X.get (), Y.get (), event.x,event.y Fill=foreColor) elif penType.get () = = 3: # draw rectangle (preview) try: canvas.delete (lastPaint) except: pass lastPaint=canvas.create_rectangle (X.get (), Y.get (), event.x,event.y,fill=backColor,outline=foreColor) elif penType.get () = 5: # Eraser canvas.create_rectangle (event.x-5,event.y-5,event.x+5 Event.y+5,fill=backColor,outline=backColor) def onReleaseLeft (event): global lastPaint,foreColor,backColor lastPaint=0 if penType.get () = = 2: # lift the left button to draw a straight line canvas.create_line (X.get (), Y.get (), event.x,event.y,fill=foreColor) elif penType.get () = = 3: # lift the left button and draw a rectangle canvas.create_rectangle (X.get (), Y.get (), event.x,event.y) Fill=backColor,outline=foreColor) canDraw.set (0) def onReleaseRight (event): menu.post (event.x_root, event.y_root) root=tkinter.Tk () root.title ("Paint") root.geometry ("800x600+280+50") lastPaint=0userText= "foreColor='black'backColor='white'X=tkinter.IntVar (value=0) Y=tkinter.IntVar (value=0) canDraw=tkinter.IntVar (value=0) # can I draw a picture? 1: yes, 0: cannot penType=tkinter.IntVar (value=1) # Brush Type, 1: curve, 2: line, 3: rectangle, 4: text 5: eraser menu=tkinter.Menu (root,tearoff=0) subMenu=tkinter.Menu (menu,tearoff=0) img=tkinter.PhotoImage () canvas=tkinter.Canvas (root,bg='white',width=800,height=600) canvas.create_image (800,800,600) menu.add_command (label='Open',command=openItem) menu.add_command (label='Save as',command=saveItem) menu.add_separator () subMenu.add_command (label='Curve',command=curveType) subMenu.add_command (label='Line',command=lineType) subMenu.add_command (label='Rectangle' Command=rectangleType) subMenu.add_command (label='Text',command=textType) subMenu.add_command (label='Erase',command=eraseType) menu.add_cascade (label='Pen Type',menu=subMenu) menu.add_separator () menu.add_command (label='Foreground Color',command=chooseForeColor) menu.add_command (label='Bakckground Color',command=chooseBackColor) menu.add_separator () menu.add_command (label='Clear',command=clearItem) canvas.bind (', onClickLeft) canvas.bind (', onMoveLeft) canvas.bind ('', onReleaseLeft) canvas.bind ('' OnReleaseRight) canvas.pack (fill=tkinter.BOTH,expand=tkinter.YES) root.mainloop ()

Running effect:

The above is all the content of this article "how to implement simple GUI programs in Python". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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