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 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         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 == pygame.K_q:
  76             self.stop()
  77
  78     @event_handler(pygame.MOUSEMOTION)
  79     def onMouseMove(self, event) :
  80         for tile in reversed(self.sprites()[:-1]) :
  81             if tile.rect.collidepoint(*event.pos) :
  82                 self.raiseTileOver(tile)
  83                 break
  84
  85     def raiseTileOver(self, tile) :
  86         if not tile.inflated :
  87             self.change_layer(tile, FOREGROUND_LAYER)
  88             tile.inflate(tile.coords)
  89
  90             if self._inflatedTile :
  91                 self._inflatedTile.deflate()
  92                 self.change_layer(self._inflatedTile, BACKGROUND_LAYER)
  93
  94             self._inflatedTile = tile
  95
  96     @event_handler(pygame.MOUSEBUTTONDOWN)
  97     def selectInstrument(self, event) :
  98         for tile in reversed(self.sprites()[:-1]) :
  99             if tile.rect.collidepoint(*event.pos) :
 100                 self.selectedInstrument = tile.instrumentDescription
 101                 self.stop()
 102                 break
 103
 104
 105
 106 class InstrumentTile(pygame.sprite.DirtySprite) :
 107
 108     @staticmethod
 109     def _get_instrument_image(name) :
 110         imagePath = os.path.abspath(__file__).split(os.path.sep)[:-1]
 111         imagePath.extend(['data', 'instruments'])
 112         name, ext = os.path.splitext(name)
 113         imagePath.append('%s%s' % (name, ext or '.jpg'))
 114         return os.path.sep.join(imagePath)
 115
 116     BORDER = 10
 117     INFLATE_ZOOM = 0.4
 118
 119     def __init__(self, instrumentDescription, group, rect, coords) :
 120         pygame.sprite.DirtySprite.__init__(self, group)
 121         self.inflated = False
 122         self.instrumentDescription = instrumentDescription
 123         self.rect = rect
 124         self._baseRect = rect.copy()
 125         self.coords = coords
 126         imagePath = InstrumentTile._get_instrument_image(instrumentDescription['name'])
 127         self._img = pygame.image.load(imagePath)
 128         self.update()
 129
 130
 131     def update(self) :
 132         innerWidth, innerHeight = [l-self.BORDER*2 for l in self.rect.size]
 133         innerSize = innerWidth, innerHeight
 134
 135         border = pygame.Surface(self.rect.size)
 136         border.fill((0xdd,0xdd,0xdd,255))
 137
 138         bg = pygame.Surface(innerSize)
 139         bg.fill((255,255,255,255))
 140         bgRect = pygame.Rect((self.BORDER, self.BORDER), innerSize)
 141
 142         img = self._img
 143         iWidth, iHeight = img.get_size()
 144         imgRatio = float(iWidth) / iHeight
 145
 146         # adapts dimensions
 147         iw = innerWidth
 148         ih = int(round(innerWidth  / imgRatio))
 149
 150         if ih > innerHeight:
 151             ih = innerHeight
 152             iw = int(round(innerHeight * imgRatio))
 153
 154         imgPosition = ((innerWidth - iw) / 2, (innerHeight - ih) / 2)
 155         imgRect = pygame.Rect(imgPosition, (iw, ih))
 156         img = pygame.transform.smoothscale(img, (iw, ih))
 157
 158         bg.blit(img, imgRect)
 159         border.blit(bg, bgRect)
 160         self.image = border
 161
 162
 163     def inflate(self, refPoint) :
 164         self.inflated = True
 165         keep = {}
 166         for name in REF_POINTS[refPoint] :
 167             keep[name] = getattr(self.rect, name)
 168
 169         self.rect.inflate_ip(*[l*self.INFLATE_ZOOM for l in self.rect.size])
 170
 171         for k, v in keep.items() :
 172             setattr(self.rect, k, v)
 173
 174         self.update()
 175         self.dirty = 1
 176
 177
 178     def deflate(self) :
 179         self.inflated = False
 180         self.rect = self._baseRect.copy()
 181         self.update()
 182         self.dirty = 1
 183
 184
 185
 186 REF_POINTS = {
 187     (0, 0) : ['top', 'left'],
 188     (1, 0) : ['top'],
 189     (2, 0) : ['top', 'right'],
 190
 191     (0, 1) : ['left'],
 192     (1, 1) : [],
 193     (2, 1) : ['right'],
 194
 195     (0, 2) : ['bottom', 'left'],
 196     (1, 2) : ['bottom'],
 197     (2, 2) : ['bottom', 'right']
 198 }