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annotate gamelib/sprite_cursor.py @ 573:ffdaac5d6cf8

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author Jeremy Thurgood <firxen@gmail.com>
date Sat, 28 Nov 2009 20:29:33 +0000
parents 9cc7bc5cd10c
children
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1 """In-game sprite cursors for the gameboard.
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2
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3 Currently mostly used when placing buildings.
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4 """
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5
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6 import pygame
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7 from pygame.locals import SRCALPHA
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8
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9 import imagecache
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10 import constants
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11 from pgu.vid import Sprite
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12
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13 # ignore os.popen3 warning generated by pygame.font.SysFont
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14 import warnings
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15 warnings.filterwarnings("ignore", "os.popen3 is deprecated.")
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16
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17 class SpriteCursor(Sprite):
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18 """A Sprite used as an on-board cursor.
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19 """
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21 def __init__(self, image_name, tv, cost=None):
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22 self._font = pygame.font.SysFont('Vera', 20, bold=True)
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23 image = imagecache.load_image(image_name, ["sprite_cursor"])
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24
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25 if cost is not None:
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26 image = self._apply_text(image, str(cost))
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27
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28 # Create the sprite somewhere far off screen
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29 Sprite.__init__(self, image, (-1000, -1000))
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30 self._tv = tv
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32 def _apply_text(self, image, stext):
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33 """Apply the text to the image."""
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34 image = image.copy()
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35 text = self._font.render(stext, True, constants.FG_COLOR)
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36 w, h = image.get_size()
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37 x, y = text.get_size()
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38 image.blit(text, (w - x, h - y))
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39 return image
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41 def set_pos(self, tile_pos):
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42 """Set the cursor position on the gameboard."""
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43 self.rect.x, self.rect.y = self._tv.tile_to_view(tile_pos)
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45 class SmallSpriteCursor(SpriteCursor):
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46 """A sprite cursor for use with images too small for the associated text."""
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48 def _apply_text(self, image, stext):
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49 text = self._font.render(stext, True, constants.FG_COLOR)
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50 w, h = image.get_size()
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51 x, y = text.get_size()
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53 new_w, new_h = w + x, max(h, y)
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55 new_image = pygame.Surface((new_w, new_h), SRCALPHA)
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56 new_image.blit(image, (0, 0))
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57 new_image.blit(text, (w, new_h - y))
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58 return new_image