python-tkinter-Screensavers

-The screensaver can be started by itself, or it can be started manually (use manual start Here)
-Stops when the mouse is moved, or if other events are raised
-If the screensaver is a canvas, there is no frame
-The action of the image is random, has randomness, may include color, size, number, direction of movement, etc.
-Overall Composition:
-ScreenSaver:
-Requires a canvas, size consistent with screen, no border
-Ball
-Random color, size, number, direction of movement, etc.
-The ball is active by calling

1 __author__="Qiuxirufeng"2 3 ImportRandom4 ImportTkinter5 6 7 classRandromball ():8     " "9 class defining the ball of motionTen     " " One  A     def __init__(self, canvas, Scrnwidth, scrnheight): -         " " - Canvas : Canvases, all content should be rendered on the canvas, where this variable is passed in the scrnwidth/scrnheight: Screen size, width and height -         " " -         #Initializing the canvas -Self.canvas =Canvas +  -         #The initial position of the ball appears randomly, where the position represents the center of the ball +         #Xpos, ypos represents the coordinates where the position appears ASelf.xpos = Random.randint (ten, int (scrnwidth)-20) atSelf.ypos = Random.randint (ten, int (scrnheight)-20) -  -         #define the speed of the ball motion -         #simulate motion: Constantly erase the original picture and redraw it in a new place -         #here the xvelocity simulates the x-axis direction of motion -self.xvelocity = Random.randint (4, 20) in         #Likewise, the yvelocity simulates the y-axis motion. -self.yvelocity = Random.randint (4, 20) to  +         #define the size of the screen -Self.scrnwidth =Scrnwidth theSelf.scrnheight =Scrnheight *  $         #the size of the ball is randomPanax Notoginseng         #here the size of the ball is represented by the radius -Self.radius = Random.randint (20, 120) the  +         #Define Color A         #RGB notation: Three numbers, each with a value of 0-255, representing the size of the red, green, and blue three colors the         #in some systems, it can also be expressed directly in English words, such as red, green +         #The RGB notation is used here, and a lambda expression is used to find an anonymous function for RGB three random values. -c =Lambda: Random.randint (0, 255) $Self.color ="#%02x%02x%02x"%(c (), C (), C ()) $  -     defCreate_ball (self): -         " " the A variable value defined with a constructor, a ball is drawn on the Zaicanvas -         " "Wuyi  the         #Tkinter does not draw a circular function, only the function of the ellipse, the ellipse needs to be defined two coordinates -         #in a rectangular inner-painted ellipse, you just need to define the upper-left and lower-right corners of the rectangle. Wu         #The method for two coordinates is that the coordinates of the center of the circle are known, and the center coordinates minus the radius can find the upper-left coordinate, and the radius can find the coordinates of the lower right angle. -X1 = Self.xpos-Self.radius AboutY1 = Self.ypos-Self.radius $x2 = Self.xpos +Self.radius -y2 = Self.ypos +Self.radius -  -         #with two diagonal coordinates, it is possible to draw a circular operation A         #Fill indicates the padding color +         #outline is the perimeter border color of the circle theSelf.item = Self.canvas.create_oval (x1, y1, x2, y2, Fill=self.color, outline=Self.color) -  $     defMove_ball (self): the         #to move the ball, you need to control the direction of the ball. the         #after each move, the ball has a new coordinate theSelf.xpos + =self.xvelocity theSelf.ypos + =self.yvelocity -  in         #The following determines if the ball will wall the         ifSelf.xpos + Self.radius >= self.scrnwidthorSelf.xpos-self.radius <=0: the             #Hit the right wall on the left, the ball is in the opposite direction, X is negative . AboutSelf.xvelocity =-self.xvelocity the             #or add a minus sign to x with the next line of code. the             #self.xvelocity *=-1 the         #In the same vein, hit the wall below. +         #if Self.ypos >= Self.scrnheight-self.radius: -         #self.yvelocity =-Self.yvelocity the         #Bayi         #if Self.ypos <= Self.radius: the         #self.yvelocity = ABS (self.yvelocity) the         #the upper and lower walls can also be replaced with the following two lines of code -         ifSelf.ypos + Self.radius >= self.scrnheightorSelf.ypos-self.radius <=0: -Self.yvelocity =-self.yvelocity the  the         #Move a picture on the canvas the Self.canvas.move (Self.item, self.xvelocity, self.yvelocity) the  -  the classScreenSaver (): the     " " the classes that define Screensavers94 can be started the     " " the     #a screen saver for randomly generated balls. theBalls = []98  About     def __init__(self): -         #the number of balls per start is random, within 6 to 50101Self.num_balls = Random.randint (6, 50)102 103Self.root =Tkinter. Tk ()104         #Cancel Border theSelf.root.overrideredirect (1)106 107         #any mouse movement needs to be canceled108Self.root.bind ('<Motion>', Self.myquit)109  the         #get the size specifications of the screen111W, h =self.root.winfo_screenwidth (), Self.root.winfo_screenheight () the 113         #Create a canvas, including the ownership of the canvas, specifications theSelf.canvas = Tkinter. Canvas (Self.root, Width=w, height=h) the Self.canvas.pack () the 117         #draw a ball on the canvas118          forIinchRange (self.num_balls):119Ball = Randromball (Self.canvas, Scrnwidth=w, scrnheight=h) - Ball.create_ball ()121 self.balls.append (Ball)122 123 Self.run_screen_saver ()124 Self.root.mainloop () the 126     defRun_screen_saver (self):127          forBallinchSelf.balls: - Ball.move_ball ()129  the         #after is a function that starts after 80 milliseconds, the function that needs to be started is the second argument131Self.canvas.after (80, Self.run_screen_saver) the 133     defMyquit (Self, event):134 Self.root.destroy ()135 136 if __name__=='__main__':137ScreenSaver ()

python-tkinter-Screensavers