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annotate gamelib/cursor.py @ 172:3b5cfb3f794e

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Ensure cursor loaded when calling set_highlight
author Stefano Rivera <stefano@rivera.za.net>
date Wed, 25 Aug 2010 13:12:14 +0200
parents a1162ea4ad67
children fbfd8e748ac0
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1 # cursor.py
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2 # Copyright Boomslang team, 2010 (see COPYING File)
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3 # Sprite Cursor
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4
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5 from albow.resource import get_image
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6 from albow.widget import Widget
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7 from pygame.sprite import Sprite, RenderUpdates
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8 import pygame
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9 import pygame.color
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10 import pygame.cursors
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11 import pygame.mouse
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12
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13 class CursorSprite(Sprite):
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14 "A Sprite that follows the Cursor"
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16 def __init__(self, filename, x, y):
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17 Sprite.__init__(self)
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18 self.filename = filename
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19 self.pointer_x = x
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20 self.pointer_y = y
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21 self.highlighted = False
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23 def load(self):
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24 if not hasattr(self, 'plain_image'):
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25 self.plain_image = get_image('items', self.filename)
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26 self.image = self.plain_image
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27 self.rect = self.image.get_rect()
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28 self.highlight = pygame.Surface(self.rect.size)
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29 color = pygame.color.Color(255, 100, 100, 0)
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30 self.highlight.fill(color)
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32 def update(self):
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33 pos = pygame.mouse.get_pos()
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34 self.rect.left = pos[0] - self.pointer_x
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35 self.rect.top = pos[1] - self.pointer_y
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37 def set_highlight(self, enable):
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38 if enable != self.highlighted:
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39 self.load()
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40 self.highlighted = enable
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41 self.image = self.plain_image.copy()
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42 if enable:
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43 self.image.blit(self.highlight, self.highlight.get_rect(),
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44 None, pygame.BLEND_MULT)
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46
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47 HAND = CursorSprite('hand.png', 12, 0)
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49
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50 class CursorWidget(Widget):
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51 """Mix-in widget to ensure that mouse_move is propogated to parents"""
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53 cursor = HAND
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55 def __init__(self, *args, **kwargs):
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56 Widget.__init__(self, *args, **kwargs)
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57 self._cursor_group = RenderUpdates()
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58 self._loaded_cursor = None
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60 def enter_screen(self):
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61 pygame.mouse.set_visible(0)
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63 def leave_screen(self):
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64 pygame.mouse.set_visible(1)
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66 def draw_all(self, _surface):
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67 Widget.draw_all(self, _surface)
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68 surface = self.get_root().surface
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69 if self.cursor != self._loaded_cursor:
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70 self._loaded_cursor = self.cursor
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71 if self.cursor is None:
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72 pygame.mouse.set_visible(1)
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73 self._cursor_group.empty()
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74 else:
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75 pygame.mouse.set_visible(0)
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76 self.cursor.load()
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77 self._cursor_group.empty()
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78 self._cursor_group.add(self.cursor)
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79 if self.cursor is not None:
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80 self._cursor_group.update()
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81 self._cursor_group.draw(surface)
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83 def mouse_delta(self, event):
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84 self.invalidate()
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86 def set_cursor(self, cursor):
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87 CursorWidget.cursor = cursor
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89 def cursor_highlight(self, enable):
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90 self.cursor.set_highlight(enable)