[pyGame learning notes] 6 Cursor mouse cursor

Pygame Provide control of system hardware cursor .Pygame Support black and white cursor （ Bitmap cursor ）, And system variant cursor and color cursor .

This cursor module contains functions for loading and decoding various cursor formats . These allow the cursor to be easily stored in an external file or directly as encoded Python character string .

This module includes several standard cursors , The parameters of these cursors are stored in a tuple .

This time, , Let's learn Pygame Cursor operation in pygame.cursor

stay Pygame In the official documents of , We can see that there are three ways to import the cursor ：

pygame.cursors.compile # Create binary cursor data from simple strings  

pygame.cursors.load_xbm #  from XBM File loading cursor data

pygame.cursors.Cursor #  Represents the cursor pygame object

We still give the initial framework first ：

import pygame
from pygame.locals import *
import sys

class Game:
    def __init__(self):
        pygame.init()
        self.W,self.H=800,800
        self.screen=pygame.display.set_mode((self.W,self.H))
        pygame.display.set_caption("【Pygame  Learning notes 】")

    def listen(self):
        for event in pygame.event.get():
            if event.type==QUIT:
                sys.exit()

    def draw(self):
        self.screen.fill((255,255,255))

    def run(self):
        while True:
            self.listen()
            self.draw()
            pygame.display.update()

if __name__ == '__main__':
    game=Game()
    game.run()

pygame.cursors There are several standard cursors below ：

pygame.cursors.arrow

pygame.cursors.diamond

pygame.cursors.broken_x

pygame.cursors.tri_left

pygame.cursors.tri_right

Examples are as follows ：

pygame.mouse.set_cursor(pygame.cursors.arrow)

pygame.mouse.set_cursor(pygame.cursors.diamond)

 pygame.mouse.set_cursor(pygame.cursors.broken_x)

 pygame.mouse.set_cursor(pygame.cursors.tri_left)

 pygame.mouse.set_cursor(pygame.cursors.tri_right)

The module also contains some cursors as formatted strings . They need to be passed to pygame.cursors.compile() function , Then we can use them .

pygame.cursors.textmarker_strings

pygame.cursors.textmarker_strings

pygame.cursors.sizer_x_strings

pygame.cursors.sizer_y_strings

pygame.cursors.sizer_xy_strings

One when typing “I” cursor

        cursor=pygame.cursors.compile(pygame.cursors.textmarker_strings)
        pygame.mouse.set_cursor((8,16),(0,0),*cursor)

Along x Coordinate the cursor when dragging the window

        cursor=pygame.cursors.compile(pygame.cursors.sizer_x_strings)
        pygame.mouse.set_cursor((24,16),(0,0),*cursor)

Along y Coordinate the cursor when dragging the window

        cursor=pygame.cursors.compile(pygame.cursors.sizer_y_strings)
        pygame.mouse.set_cursor((16,24),(0,0),*cursor)

Along xy Coordinate the cursor when dragging the window （ Cursor at the corner of the window ）

        cursor=pygame.cursors.compile(pygame.cursors.sizer_xy_strings)
        pygame.mouse.set_cursor((24,16),(0,0),*cursor)

Be careful , These four cursors are all composed of a tuple , There are several strings in the tuple , If we treat strings as arrays , It's just a two-dimensional array , therefore set_cursor The first tuple passed in later is this “ Two dimensional array ” Size , It can be used len Method and index , View these tuples directly , You can also be like it , Create your own cursor

The explanation of this tuple in the official document is as follows ：

thickarrow_strings = (               #sized 24x24
  "XX                      ",
  "XXX                     ",
  "XXXX                    ",
  "XX.XX                   ",
  "XX..XX                  ",
  "XX...XX                 ",
  "XX....XX                ",
  "XX.....XX               ",
  "XX......XX              ",
  "XX.......XX             ",
  "XX........XX            ",
  "XX........XXX           ",
  "XX......XXXXX           ",
  "XX.XXX..XX              ",
  "XXXX XX..XX             ",
  "XX   XX..XX             ",
  "     XX..XX             ",
  "      XX..XX            ",
  "      XX..XX            ",
  "       XXXX             ",
  "       XX               ",
  "                        ",
  "                        ",
  "                        ")

  The reference code of this learning note is as follows ：

import pygame
from pygame.locals import *
import sys

class Game:
    def __init__(self):
        pygame.init()
        self.W,self.H=800,800
        self.screen=pygame.display.set_mode((self.W,self.H))
        pygame.display.set_caption("【Pygame  Learning notes 】")

    def listen(self):
        for event in pygame.event.get():
            if event.type==QUIT:
                sys.exit()

    def draw(self):
        self.screen.fill((255,255,255))
        # pygame.mouse.set_cursor(pygame.cursors.arrow)
        # cursor=pygame.cursors.compile(pygame.cursors.textmarker_strings)
        # pygame.mouse.set_cursor((8,16),(0,0),*cursor)
        # cursor=pygame.cursors.compile(pygame.cursors.sizer_x_strings)
        # pygame.mouse.set_cursor((24,16),(0,0),*cursor)
        # cursor=pygame.cursors.compile(pygame.cursors.sizer_y_strings)
        # pygame.mouse.set_cursor((16,24),(0,0),*cursor)
        cursor=pygame.cursors.compile(pygame.cursors.sizer_xy_strings)
        pygame.mouse.set_cursor((24,16),(0,0),*cursor)

    def run(self):
        while True:
            self.listen()
            self.draw()
            pygame.display.update()

if __name__ == '__main__':
    game=Game()
    game.run()

It's not easy to make , If you like, just like the collection + Pay attention ~

Thank you for your support ~