def _initializeGridSprites(self):
# We already know the maximum number of track lines, so go ahead and add them all now
for i in range(0, Sequence.MAX_TRACKS):
self.add(TrackLine(i, self.rect.width, self.skin.guiColor("Track Line")))
# Add a few empty sprites for these groups
# This is necessary so that the layers are properly sorted for this sprite
# group, and also so that grid can be efficiently created by there being at
# least one item to compare the current time with.
self.add(BarLine(Position(0), (0, 0),
self.rect.height, 1, self.skin.guiColor("Bar Line"),
self.getSpeed()))
# Finally, add the cursor object, which should always be on the very top
self.cursor = CursorLine(Position(0), (0, 1), self.getTrackHeightInPx() + 1, 4,
self.skin.guiColor("Cursor"), self.getSpeed())
self.add(self.cursor, layer=3)
self._updateBarLines()
self._updateTrackLines()
class GridSpriteGroup(LayeredDirty, SequenceObserver):
class Width:
MIN_WIDTH_IN_BARS = 32 # 1 minute @ 120 BPM
MAX_WIDTH_IN_BARS = 1024 # 30 minutes @ 120 BPM
DEF_WIDTH_IN_BARS = MIN_WIDTH_IN_BARS
class Layers:
GRID = 0
BLOCKS = 1
CURSOR = 2
POPUPS = 3
DEFAULT = GRID
def __init__(self, sequence:Sequence, offset:tuple, rect:pygame.Rect, skin:Skin):
LayeredDirty.__init__(self)
self.sequence = sequence
self.sequence.addObserver(self)
self.offset = offset
self.rect = rect
self.skin = skin
self.blocks = []
self.trackLines = []
self.barLines = []
self.lastTime = sequence.getTime()
self.widthInBeats = sequence.timeSignature.getBeatsForBars(self.Width.DEF_WIDTH_IN_BARS)
self.activeTrackCount = Sequence.MIN_TRACKS
self._initializeGridSprites()
def _initializeGridSprites(self):
# We already know the maximum number of track lines, so go ahead and add them all now
for i in range(0, Sequence.MAX_TRACKS):
self.add(TrackLine(i, self.rect.width, self.skin.guiColor("Track Line")))
# Add a few empty sprites for these groups
# This is necessary so that the layers are properly sorted for this sprite
# group, and also so that grid can be efficiently created by there being at
# least one item to compare the current time with.
self.add(BarLine(Position(0), (0, 0),
self.rect.height, 1, self.skin.guiColor("Bar Line"),
self.getSpeed()))
# Finally, add the cursor object, which should always be on the very top
self.cursor = CursorLine(Position(0), (0, 1), self.getTrackHeightInPx() + 1, 4,
self.skin.guiColor("Cursor"), self.getSpeed())
self.add(self.cursor, layer=3)
self._updateBarLines()
self._updateTrackLines()
def add(self, *sprites, **kwargs):
for sprite in sprites:
layer = GridSpriteGroup.Layers.DEFAULT
if isinstance(sprite, Block):
self.blocks.append(sprite)
layer = GridSpriteGroup.Layers.BLOCKS
elif isinstance(sprite, CursorLine):
layer = GridSpriteGroup.Layers.CURSOR
elif isinstance(sprite, BarLine):
self.barLines.append(sprite)
layer = GridSpriteGroup.Layers.GRID
elif isinstance(sprite, TrackLine):
self.trackLines.append(sprite)
layer = GridSpriteGroup.Layers.GRID
elif isinstance(sprite, Popup):
layer = GridSpriteGroup.Layers.POPUPS
super().add(sprite, layer=layer)
def onItemAdded(self, item:Item):
self.addItem(item)
def addItem(self, item:Item):
positionX = self.getOffsetFromFirstBarLine(item.position.beats)
positionY = self.trackLines[item.track].rect.top
width = item.getLengthInBeats() * self.getBeatWidthInPx()
self.add(Block(item, (positionX, positionY),
width, self.getTrackHeightInPx(),
self.skin.nextPaletteColor(), self.skin.font("Block"),
self.getSpeed()))
# TODO: This really shouldn't be necessary...
self.change_layer(self.cursor, GridSpriteGroup.Layers.CURSOR)
def remove_internal(self, sprite):
super().remove_internal(sprite)
if isinstance(sprite, Block):
self.blocks.remove(sprite)
elif isinstance(sprite, BarLine):
self.barLines.remove(sprite)
elif isinstance(sprite, TrackLine):
self.trackLines.remove(sprite)
def draw(self, surface, bgd=None):
updateRects = super().draw(surface, bgd)
# TODO: It's probably more efficient to pass the offset into draw()
for rect in updateRects:
rect.left += self.offset[0]
rect.top += self.offset[1]
return updateRects
def update(self, *args):
now = self.sequence.getTime()
elapsedTime = float(now - self.lastTime)
super().update(elapsedTime)
self.lastTime = now
self._updateBarLines()
self._updateCursor()
def _updateCursor(self):
if self.cursor.isOffscreen:
firstBarLine = self.barLines[0]
self.cursor.moveToBeat(firstBarLine.position.beats, firstBarLine.rect.right)
self.cursor.isOffscreen = False
def _updateBarLines(self):
numBarLines = len(self.barLines)
lastBarLine = self.barLines[numBarLines - 1]
while lastBarLine.rect.left < self.rect.right:
nextRect = lastBarLine.rect.move(self.getBarWidthInPx(), 0)
barLine = BarLine(Position(lastBarLine.position.beats + 4), (nextRect.left, nextRect.top), self.rect.height, 1,
self.skin.guiColor("Bar Line"), self.getSpeed())
self.add(barLine)
lastBarLine = barLine
def _updateBarLineWidths(self):
barWidth = self.getBarWidthInPx()
startingBarX = self.barLines[0].rect.left
for i in range(1, len(self.barLines)):
barLine = self.barLines[i]
barLine.rect.left = startingBarX + (barWidth * i)
barLine.dirty = True
def _updateGridItemSpeeds(self):
speed = self.getSpeed()
for sprite in self.barLines:
sprite.speedInPxPerSec = speed
for sprite in self.blocks:
sprite.speedInPxPerSec = speed
self.cursor.speedInPxPerSec = speed
def _updateTrackLines(self):
trackHeightInPx = self.getTrackHeightInPx()
for trackLine in self.trackLines:
trackLine.visible = trackLine.track < self.activeTrackCount
if trackLine.visible:
trackLine.setTop(self.rect.top + trackHeightInPx * trackLine.track)
else:
trackLine.setTop(-1)
trackLine.dirty = 1
self._updateBlockHeights(trackHeightInPx + 1)
# TODO: 1 is used here for the track line height, but this should not be hardcoded
self.cursor.updateHeight(trackHeightInPx - 1)
def _updateBlockHeights(self, trackHeightInPx:int):
for block in self.blocks:
newRect = block.rect
newRect.top = self.trackLines[block.item.track].rect.top
newRect.height = trackHeightInPx
block.resize(newRect)
def reset(self):
for sprite in self.blocks:
sprite.kill()
def getSpeed(self):
return self.rect.width / self.getWidthInSec()
def getTrackHeightInPx(self):
return self.rect.height / self.activeTrackCount
def getBeatWidthInPx(self):
return self.rect.width / self.widthInBeats
def getBarWidthInPx(self):
return self.rect.width / self.getWidthInBars()
def getWidthInBars(self):
return self.sequence.timeSignature.getBarsForBeats(self.widthInBeats)
def getWidthInSec(self):
return MusicTimeConverter.beatsToSeconds(self.getTempo(), self.widthInBeats)
def getTempo(self):
return self.sequence.getTempo()
def setTempo(self, tempo:float):
self.sequence.setTempo(tempo)
def moveCursorLeft(self, beats:int):
nextBeat = self.cursor.position.beats - beats
if nextBeat >= self.barLines[0].position.beats:
self.cursor.moveToBeat(nextBeat, self.getOffsetFromFirstBarLine(nextBeat))
def moveCursorRight(self, beats:int):
nextBeat = self.cursor.position.beats + beats
if nextBeat < self.sequence.timeSignature.getBeatsForBars(self.Width.MAX_WIDTH_IN_BARS):
if nextBeat - self.barLines[0].position.beats >= self.widthInBeats:
self.expandBars(beats)
self.cursor.moveToBeat(nextBeat, self.getOffsetFromFirstBarLine(nextBeat))
def getOffsetFromFirstBarLine(self, beats:int):
return self.barLines[0].rect.left + \
((beats - self.barLines[0].position.beats) * self.getBeatWidthInPx())
def moveUp(self):
nextTrack = self.cursor.track - 1
if nextTrack >= 0:
if nextTrack < self.activeTrackCount:
currentBeat = self.sequence.getCurrentBeat()
if not self.sequence.hasItemsAfterBeat(currentBeat, self.activeTrackCount - 1):
self.collapseTracks()
self.cursor.moveToTrack(nextTrack, self.trackLines[nextTrack].rect.bottom)
def moveDown(self):
nextTrack = self.cursor.track + 1
if nextTrack < Sequence.MAX_TRACKS:
if nextTrack >= self.activeTrackCount:
self.expandTracks()
self.cursor.moveToTrack(nextTrack, self.trackLines[nextTrack].rect.bottom)
def expandTracks(self):
self.activeTrackCount += 1
self._updateTrackLines()
def collapseTracks(self):
if self.activeTrackCount > Sequence.MIN_TRACKS:
self.activeTrackCount -= 1
self._updateTrackLines()
def expandBars(self, widthInBeats:int):
self.widthInBeats += widthInBeats
self._updateBarLineWidths()
self._updateBarLines()
self._updateBlockSizes()
self._updateGridItemSpeeds()
def _updateBlockSizes(self):
beatWidth = self.getBeatWidthInPx()
for block in self.blocks:
block.rect.left = self.getOffsetFromFirstBarLine(block.position.beats)
newRect = pygame.Rect(block.rect.left, block.rect.top,
block.item.getLengthInBeats() * beatWidth, block.rect.height)
block.resize(newRect)
def collapseBars(self):
if self.getWidthInBars() > self.Width.MIN_WIDTH_IN_BARS:
self.widthInBeats -= self.sequence.timeSignature.beatsPerMeasure
self._updateGridItemSpeeds()
def getNearestTrackLineAt(self, position:tuple):
trackHeightInPx = self.getTrackHeightInPx()
for trackLine in self.trackLines:
if trackLine.visible:
if position[1] > trackLine.rect.top and \
position[1] - trackLine.rect.top < trackHeightInPx:
return trackLine
return None
def getNearestBarLineAt(self, position:tuple):
barWidthInPx = self.getBarWidthInPx()
for barLine in self.barLines:
if barLine.visible:
if position[0] > barLine.rect.left and \
position[0] - barLine.rect.left < barWidthInPx:
return barLine
return None
