src/minwii/widgets/instrumentselector.py

   1 # -*- coding: utf-8 -*-
   2 """
   3 Écran de sélection de l'instrument
   4
   5 $Id$
   6 $URL$
   7 """
   8 import os.path
   9 import pygame
  10 from minwii.eventutils import event_handler, EventDispatcher, EventHandlerMixin
  11 from minwii.config import FRAMERATE
  12 from minwii.config import  INSTRUMENTS
  13 from minwii.globals import BACKGROUND_LAYER
  14 from minwii.globals import FOREGROUND_LAYER
  15 from minwii.globals import CURSOR_LAYER
  16 from minwii.globals import hls_to_rgba_8bits
  17 from cursors import WarpingCursor
  18
  19
  20 class InstrumentSelector(pygame.sprite.LayeredDirty, EventHandlerMixin) :
  21
  22     rows = 3
  23     cols = 3
  24     instruments = INSTRUMENTS
  25
  26     def __init__(self) :
  27         super(InstrumentSelector, self).__init__()
  28         #self._initRects()
  29         self._initTiles()
  30         self._initCursor()
  31         self._inflatedTile = None
  32         self.selectedInstrument = None
  33
  34     def _initTiles(self) :
  35         screen = pygame.display.get_surface()
  36         tileWidth = int(round(float(screen.get_width()) / self.cols))
  37         tileHeight = int(round(float(screen.get_height()) / self.rows))
  38
  39         self.tiles = []
  40         instrus = list(self.instruments[:])
  41         for y in range(self.cols) :
  42             for x in range(self.rows) :
  43                 upperLeftCorner = (x * tileWidth, y * tileHeight)
  44                 rect = pygame.Rect(upperLeftCorner, (tileWidth, tileHeight))
  45                 # !!! s'il y avait plus de 3x3 tuiles !!!, il faudrait alors
  46                 # changer le tuple (x,y) qui concerne le point d'application de l'homotétie.
  47                 # Cf. InstrumentTile.inflate
  48                 tile = InstrumentTile(instrus.pop(0), self, rect, (x,y))
  49                 self.add(tile, layer=BACKGROUND_LAYER)
  50                 self.tiles.append(tile)
  51
  52     def _initCursor(self) :
  53         self.cursor = WarpingCursor(blinkMode=True)
  54         self.add(self.cursor, layer=CURSOR_LAYER)
  55
  56
  57     def run(self):
  58         self._running = True
  59         clock = pygame.time.Clock()
  60         pygame.display.flip()
  61         pygame.mouse.set_visible(False)
  62         while self._running :
  63             EventDispatcher.dispatchEvents()
  64             dirty = self.draw(pygame.display.get_surface())
  65             pygame.display.update(dirty)
  66             clock.tick(FRAMERATE)
  67
  68     def stop(self) :
  69         self._running = False
  70         pygame.mouse.set_visible(True)
  71         self.cursor._stopBlink()
  72
  73     @event_handler(pygame.KEYDOWN)
  74     def handleKeyDown(self, event) :
  75         if event.key in (pygame.K_q, pygame.K_ESCAPE) or \
  76             event.unicode == u'q' :
  77             self.stop()
  78
  79     @event_handler(pygame.MOUSEMOTION)
  80     def onMouseMove(self, event) :
  81         for tile in reversed(self.sprites()[:-1]) :
  82             if tile.rect.collidepoint(*event.pos) :
  83                 self.raiseTileOver(tile)
  84                 break
  85
  86     def raiseTileOver(self, tile) :
  87         if not tile.inflated :
  88             self.change_layer(tile, FOREGROUND_LAYER)
  89             tile.inflate(tile.coords)
  90
  91             if self._inflatedTile :
  92                 self._inflatedTile.deflate()
  93                 self.change_layer(self._inflatedTile, BACKGROUND_LAYER)
  94
  95             self._inflatedTile = tile
  96
  97     @event_handler(pygame.MOUSEBUTTONDOWN)
  98     def selectInstrument(self, event) :
  99         for tile in reversed(self.sprites()[:-1]) :
 100             if tile.rect.collidepoint(*event.pos) :
 101                 self.selectedInstrument = tile.instrumentDescription
 102                 self.stop()
 103                 break
 104
 105
 106
 107 class InstrumentTile(pygame.sprite.DirtySprite) :
 108
 109     @staticmethod
 110     def _get_instrument_image(name) :
 111         imagePath = os.path.abspath(__file__).split(os.path.sep)[:-1]
 112         imagePath.extend(['data', 'instruments'])
 113         name, ext = os.path.splitext(name)
 114         imagePath.append('%s%s' % (name, ext or '.jpg'))
 115         return os.path.sep.join(imagePath)
 116
 117     BORDER = 10
 118     INFLATE_ZOOM = 0.4
 119
 120     def __init__(self, instrumentDescription, group, rect, coords) :
 121         pygame.sprite.DirtySprite.__init__(self, group)
 122         self.inflated = False
 123         self.instrumentDescription = instrumentDescription
 124         self.rect = rect
 125         self._baseRect = rect.copy()
 126         self.coords = coords
 127         imagePath = InstrumentTile._get_instrument_image(instrumentDescription['name'])
 128         self._img = pygame.image.load(imagePath)
 129         self.update()
 130
 131
 132     def update(self) :
 133         innerWidth, innerHeight = [l-self.BORDER*2 for l in self.rect.size]
 134         innerSize = innerWidth, innerHeight
 135
 136         border = pygame.Surface(self.rect.size)
 137         border.fill((0xdd,0xdd,0xdd,255))
 138
 139         bg = pygame.Surface(innerSize)
 140         bg.fill((255,255,255,255))
 141         bgRect = pygame.Rect((self.BORDER, self.BORDER), innerSize)
 142
 143         img = self._img
 144         iWidth, iHeight = img.get_size()
 145         imgRatio = float(iWidth) / iHeight
 146
 147         # adapts dimensions
 148         iw = innerWidth
 149         ih = int(round(innerWidth  / imgRatio))
 150
 151         if ih > innerHeight:
 152             ih = innerHeight
 153             iw = int(round(innerHeight * imgRatio))
 154
 155         imgPosition = ((innerWidth - iw) / 2, (innerHeight - ih) / 2)
 156         imgRect = pygame.Rect(imgPosition, (iw, ih))
 157         img = pygame.transform.smoothscale(img, (iw, ih))
 158
 159         bg.blit(img, imgRect)
 160         border.blit(bg, bgRect)
 161         self.image = border
 162
 163
 164     def inflate(self, refPoint) :
 165         self.inflated = True
 166         keep = {}
 167         for name in REF_POINTS[refPoint] :
 168             keep[name] = getattr(self.rect, name)
 169
 170         self.rect.inflate_ip(*[l*self.INFLATE_ZOOM for l in self.rect.size])
 171
 172         for k, v in keep.items() :
 173             setattr(self.rect, k, v)
 174
 175         self.update()
 176         self.dirty = 1
 177
 178
 179     def deflate(self) :
 180         self.inflated = False
 181         self.rect = self._baseRect.copy()
 182         self.update()
 183         self.dirty = 1
 184
 185
 186
 187 REF_POINTS = {
 188     (0, 0) : ['top', 'left'],
 189     (1, 0) : ['top'],
 190     (2, 0) : ['top', 'right'],
 191
 192     (0, 1) : ['left'],
 193     (1, 1) : [],
 194     (2, 1) : ['right'],
 195
 196     (0, 2) : ['bottom', 'left'],
 197     (1, 2) : ['bottom'],
 198     (2, 2) : ['bottom', 'right']
 199 }