- pygame module for cursor resources
— create binary cursor data from simple strings — load cursor data from an XBM file — pygame object representing a cursor
Pygame offers control over the system hardware cursor. Pygame supports black and white cursors (bitmap cursors), as well as system variant cursors and color cursors. You control the cursor with functions inside
pygame.mousepygame module to work with the mouse.
This cursors module contains functions for loading and decoding various cursor formats. These allow you to easily store your cursors in external files or directly as encoded python strings.
The module includes several standard cursors. The
pygame.mouse.set_cursor()set the mouse cursor to a new cursor function takes several arguments. All those arguments have been stored in a single tuple you can call like this:
The following variables can be passed to
This module also contains a few cursors as formatted strings. You'll need to pass these to
pygame.cursors.compile()function before you can use them. The example call would look like this:
>>> cursor = pygame.cursors.compile(pygame.cursors.textmarker_strings) >>> pygame.mouse.set_cursor((8, 16), (0, 0), *cursor)
The following strings can be converted into cursor bitmaps with
- create binary cursor data from simple stringscompile(strings, black='X', white='.', xor='o') -> data, mask
A sequence of strings can be used to create binary cursor data for the system cursor. This returns the binary data in the form of two tuples. Those can be passed as the third and fourth arguments respectively of the
pygame.mouse.set_cursor()set the mouse cursor to a new cursor function.
If you are creating your own cursor strings, you can use any value represent the black and white pixels. Some system allow you to set a special toggle color for the system color, this is also called the xor color. If the system does not support xor cursors, that color will simply be black.
The height must be divisible by 8. The width of the strings must all be equal and be divisible by 8. If these two conditions are not met,
ValueErroris raised. An example set of cursor strings looks like this
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 ", " ", " ", " ")
- load cursor data from an XBM fileload_xbm(cursorfile) -> cursor_argsload_xbm(cursorfile, maskfile) -> cursor_args
This loads cursors for a simple subset of
XBMfiles are traditionally used to store cursors on UNIX systems, they are an ASCII format used to represent simple images.
Sometimes the black and white color values will be split into two separate
XBMfiles. You can pass a second maskfile argument to load the two images into a single cursor.
The cursorfile and maskfile arguments can either be filenames or file-like object with the readlines method.
The return value cursor_args can be passed directly to the
- pygame object representing a cursorCursor(size, hotspot, xormasks, andmasks) -> CursorCursor(hotspot, surface) -> CursorCursor(constant) -> CursorCursor(Cursor) -> CursorCursor() -> Cursor
— copy the current cursor — get the cursor type — get the cursor data
In pygame 2, there are 3 types of cursors you can create to give your game that little bit of extra polish. There's bitmap type cursors, which existed in pygame 1.x, and are compiled from a string or load from an xbm file. Then there are system type cursors, where you choose a preset that will convey the same meaning but look native across different operating systems. Finally you can create a color cursor, which displays a pygame surface as the cursor.
Creating a system cursor
Choose a constant from this list, pass it into
pygame.cursors.Cursor(constant), and you're good to go. Be advised that not all systems support every system cursor, and you may get a substitution instead. For example, on macOS, WAIT/WAITARROW should show up as an arrow, and SIZENWSE/SIZENESW/SIZEALL should show up as a closed hand. And on Wayland, every SIZE cursor should show up as a hand.
Pygame Cursor Constant Description -------------------------------------------- pygame.SYSTEM_CURSOR_ARROW arrow pygame.SYSTEM_CURSOR_IBEAM i-beam pygame.SYSTEM_CURSOR_WAIT wait pygame.SYSTEM_CURSOR_CROSSHAIR crosshair pygame.SYSTEM_CURSOR_WAITARROW small wait cursor (or wait if not available) pygame.SYSTEM_CURSOR_SIZENWSE double arrow pointing northwest and southeast pygame.SYSTEM_CURSOR_SIZENESW double arrow pointing northeast and southwest pygame.SYSTEM_CURSOR_SIZEWE double arrow pointing west and east pygame.SYSTEM_CURSOR_SIZENS double arrow pointing north and south pygame.SYSTEM_CURSOR_SIZEALL four pointed arrow pointing north, south, east, and west pygame.SYSTEM_CURSOR_NO slashed circle or crossbones pygame.SYSTEM_CURSOR_HAND hand
Creating a cursor without passing arguments
In addition to the cursor constants available and described above, you can also call
pygame.cursors.Cursor(), and your cursor is ready (doing that is the same as calling
pygame.cursors.Cursor(pygame.SYSTEM_CURSOR_ARROW). Doing one of those calls actually creates a system cursor using the default native image.
Creating a color cursor
To create a color cursor, create a
hotspotis an (x,y) coordinate that determines where in the cursor the exact point is. The hotspot position must be within the bounds of the
Creating a bitmap cursor
When the mouse cursor is visible, it will be displayed as a black and white bitmap using the given bitmask arrays. The
sizeis a sequence containing the cursor width and height.
hotspotis a sequence containing the cursor hotspot position.
A cursor has a width and height, but a mouse position is represented by a set of point coordinates. So the value passed into the cursor
hotspotvariable helps pygame to actually determine at what exact point the cursor is at.
xormasksis a sequence of bytes containing the cursor xor data masks. Lastly
andmasks, a sequence of bytes containing the cursor bitmask data. To create these variables, we can make use of the
pygame.cursors.compile()create binary cursor data from simple strings function.
Width and height must be a multiple of 8, and the mask arrays must be the correct size for the given width and height. Otherwise an exception is raised.
- copy the current cursorcopy() -> Cursor
Returns a new Cursor object with the same data and hotspot as the original.
- get the cursor typetype -> string
The type will be
- get the cursor datadata -> tuple
Returns the data that was used to create this cursor object, wrapped up in a tuple.
New in pygame 2.0.1.
Example code for creating and settings cursors. (Click the mouse to switch cursor)
# pygame setup import pygame pygame.init() screen = pygame.display.set_mode([600, 400]) pygame.display.set_caption("Example code for the cursors module") # create a system cursor system = pygame.cursors.Cursor(pygame.SYSTEM_CURSOR_NO) # create bitmap cursors bitmap_1 = pygame.cursors.Cursor(*pygame.cursors.arrow) bitmap_2 = pygame.cursors.Cursor( (24, 24), (0, 0), *pygame.cursors.compile(pygame.cursors.thickarrow_strings) ) # create a color cursor surf = pygame.Surface((40, 40)) # you could also load an image surf.fill((120, 50, 50)) # and use that as your surface color = pygame.cursors.Cursor((20, 20), surf) cursors = [system, bitmap_1, bitmap_2, color] cursor_index = 0 pygame.mouse.set_cursor(cursors[cursor_index]) clock = pygame.time.Clock() going = True while going: clock.tick(60) screen.fill((0, 75, 30)) pygame.display.flip() for event in pygame.event.get(): if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE): going = False # if the mouse is clicked it will switch to a new cursor if event.type == pygame.MOUSEBUTTONDOWN: cursor_index += 1 cursor_index %= len(cursors) pygame.mouse.set_cursor(cursors[cursor_index]) pygame.quit()
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