src/app/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 eventutils import event_handler, EventDispatcher, EventHandlerMixin
  11 from cursors import WarpingCursor
  12 from config import FRAMERATE
  13 from config import  INSTRUMENTS
  14 from globals import BACKGROUND_LAYER
  15 from globals import FOREGROUND_LAYER
  16 from globals import CURSOR_LAYER
  17 from globals import hls_to_rgba_8bits
  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
  33     def _initTiles(self) :
  34         screen = pygame.display.get_surface()
  35         tileWidth = int(round(float(screen.get_width()) / self.cols))
  36         tileHeight = int(round(float(screen.get_height()) / self.rows))
  37
  38         self.tiles = []
  39         instrus = list(self.instruments[:])
  40         for y in range(self.cols) :
  41             for x in range(self.rows) :
  42                 upperLeftCorner = (x * tileWidth, y * tileHeight)
  43                 rect = pygame.Rect(upperLeftCorner, (tileWidth, tileHeight))
  44                 # !!! s'il y avait plus de 3x3 tuiles !!!, il faudrait alors
  45                 # changer le tuple (x,y) qui concerne le point d'application de l'homotétie.
  46                 # Cf. InstrumentTile.inflate
  47                 tile = InstrumentTile(instrus.pop(0), self, rect, (x,y))
  48                 self.add(tile, layer=BACKGROUND_LAYER)
  49                 self.tiles.append(tile)
  50
  51     def _initCursor(self) :
  52         self.cursor = WarpingCursor(blinkMode=True)
  53         self.add(self.cursor, layer=CURSOR_LAYER)
  54
  55
  56     def run(self):
  57         self._running = True
  58         clock = pygame.time.Clock()
  59         pygame.display.flip()
  60         pygame.mouse.set_visible(False)
  61         while self._running :
  62             EventDispatcher.dispatchEvents()
  63             dirty = self.draw(pygame.display.get_surface())
  64             pygame.display.update(dirty)
  65             clock.tick(FRAMERATE)
  66
  67     def stop(self) :
  68         self._running = False
  69         pygame.mouse.set_visible(True)
  70         self.cursor._stopBlink()
  71
  72     @event_handler(pygame.KEYDOWN)
  73     def handleKeyDown(self, event) :
  74         if event.key == pygame.K_q:
  75             self.stop()
  76
  77     @event_handler(pygame.MOUSEMOTION)
  78     def onMouseMove(self, event) :
  79         for tile in reversed(self.sprites()[:-1]) :
  80             if tile.rect.collidepoint(*event.pos) :
  81                 self.raiseTileOver(tile)
  82                 break
  83
  84     def raiseTileOver(self, tile) :
  85         if not tile.inflated :
  86             self.change_layer(tile, FOREGROUND_LAYER)
  87             tile.inflate(tile.coords)
  88
  89             if self._inflatedTile :
  90                 self._inflatedTile.deflate()
  91                 self.change_layer(self._inflatedTile, BACKGROUND_LAYER)
  92
  93             self._inflatedTile = tile
  94
  95     @event_handler(pygame.MOUSEBUTTONDOWN)
  96     def selectInstrument(self, event) :
  97         for tile in reversed(self.sprites()[:-1]) :
  98             if tile.rect.collidepoint(*event.pos) :
  99                 self.selectedInstrument = tile.instrumentDescription
 100                 self.stop()
 101                 break
 102
 103
 104
 105 class InstrumentTile(pygame.sprite.DirtySprite) :
 106
 107     @staticmethod
 108     def _get_instrument_image(name) :
 109         imagePath = os.path.abspath(__file__).split(os.path.sep)[:-1]
 110         imagePath.extend(['data', 'instruments'])
 111         name, ext = os.path.splitext(name)
 112         imagePath.append('%s%s' % (name, ext or '.jpg'))
 113         return os.path.sep.join(imagePath)
 114
 115     BORDER = 10
 116     INFLATE_ZOOM = 0.4
 117
 118     def __init__(self, instrumentDescription, group, rect, coords) :
 119         pygame.sprite.DirtySprite.__init__(self, group)
 120         self.inflated = False
 121         self.instrumentDescription = instrumentDescription
 122         self.rect = rect
 123         self._baseRect = rect.copy()
 124         self.coords = coords
 125         imagePath = InstrumentTile._get_instrument_image(instrumentDescription['name'])
 126         self._img = pygame.image.load(imagePath)
 127         self.update()
 128
 129
 130     def update(self) :
 131         innerWidth, innerHeight = [l-self.BORDER*2 for l in self.rect.size]
 132         innerSize = innerWidth, innerHeight
 133
 134         border = pygame.Surface(self.rect.size)
 135         border.fill((0,0,0,255))
 136
 137         bg = pygame.Surface(innerSize)
 138         bg.fill((255,255,255,255))
 139         bgRect = pygame.Rect((self.BORDER, self.BORDER), innerSize)
 140
 141         img = self._img
 142         iWidth, iHeight = img.get_size()
 143         imgRatio = float(iWidth) / iHeight
 144
 145         # adapts dimensions
 146         iw = innerWidth
 147         ih = int(round(innerWidth  / imgRatio))
 148
 149         if ih > innerHeight:
 150             ih = innerHeight
 151             iw = int(round(innerHeight * imgRatio))
 152
 153         imgPosition = ((innerWidth - iw) / 2, (innerHeight - ih) / 2)
 154         imgRect = pygame.Rect(imgPosition, (iw, ih))
 155         img = pygame.transform.smoothscale(img, (iw, ih))
 156
 157         bg.blit(img, imgRect)
 158         border.blit(bg, bgRect)
 159         self.image = border
 160
 161
 162     def inflate(self, refPoint) :
 163         self.inflated = True
 164         keep = {}
 165         for name in REF_POINTS[refPoint] :
 166             keep[name] = getattr(self.rect, name)
 167
 168         self.rect.inflate_ip(*[l*self.INFLATE_ZOOM for l in self.rect.size])
 169
 170         for k, v in keep.items() :
 171             setattr(self.rect, k, v)
 172
 173         self.update()
 174         self.dirty = 1
 175
 176
 177     def deflate(self) :
 178         self.inflated = False
 179         self.rect = self._baseRect.copy()
 180         self.update()
 181         self.dirty = 1
 182
 183
 184
 185 REF_POINTS = {
 186     (0, 0) : ['top', 'left'],
 187     (1, 0) : ['top'],
 188     (2, 0) : ['top', 'right'],
 189
 190     (0, 1) : ['left'],
 191     (1, 1) : [],
 192     (2, 1) : ['right'],
 193
 194     (0, 2) : ['bottom', 'left'],
 195     (1, 2) : ['bottom'],
 196     (2, 2) : ['bottom', 'right']
 197 }