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# -*- coding: utf-8 -*-
# libavg - Media Playback Engine.
# Copyright (C) 2003-2014 Ulrich von Zadow
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Current versions can be found at www.libavg.de
from libavg import avg, player
class Orientation():
VERTICAL = 0
HORIZONTAL = 1
def bmpFromSrc(src):
if isinstance(src, basestring):
return avg.Bitmap(src)
elif isinstance(src, avg.Bitmap):
return src
else:
raise RuntimeError("src must be a string or a Bitmap.")
class _StretchNodeBase(avg.DivNode):
def __init__(self, src=None, parent=None, **kwargs):
super(_StretchNodeBase, self).__init__(**kwargs)
self.registerInstance(self, parent)
if isinstance(src, avg.Bitmap):
self._bmp = src
else:
self._bmp = bmpFromSrc(src)
self.subscribe(self.SIZE_CHANGED, self._positionNodes)
def _initNodes(self):
self._setSizeFromBmp(self._bmp)
self._positionNodes(self.size)
if player.isPlaying():
self._renderImages()
else:
player.subscribe(avg.Player.PLAYBACK_START, self._renderImages)
def _setSizeFromBmp(self, bmp):
size = bmp.getSize()
if self.width == 0:
self.width = size.x
if self.height == 0:
self.height = size.y
def _checkExtents(self, endsExtent, minExtent):
if endsExtent < 0:
raise RuntimeError(
"Illegal value for endsExtent: %i. Must be >= 0"%endsExtent)
elif endsExtent == 0:
# 1 has same effect as 0 - we just create one-pixel wide start and end images.
endsExtent = 1
if minExtent == -1:
minExtent = endsExtent*2+1
else:
minExtent = minExtent
return (endsExtent, minExtent)
def _renderImage(self, srcBmp, node, pos, size):
canvas = player.createCanvas(id="stretch_canvas", size=size)
img = avg.ImageNode(pos=pos, parent=canvas.getRootNode())
img.setBitmap(srcBmp)
canvas.render()
node.setBitmap(canvas.screenshot())
player.deleteCanvas("stretch_canvas")
class HStretchNode(_StretchNodeBase):
def __init__(self, endsExtent, minExtent=-1, **kwargs):
super(HStretchNode, self).__init__(**kwargs)
(self.__endsExtent, self.__minExtent) = self._checkExtents(endsExtent, minExtent)
self.__startImg = avg.ImageNode(parent=self)
self.__centerImg = avg.ImageNode(parent=self)
self.__endImg = avg.ImageNode(parent=self)
self._initNodes()
def _positionNodes(self, newSize):
if newSize.x < self.__minExtent:
self.width = self.__minExtent
else:
self.__centerImg.x = self.__endsExtent
self.__centerImg.width = newSize.x - self.__endsExtent*2
self.__endImg.x = newSize.x - self.__endsExtent
def _renderImages(self):
height = self._bmp.getSize().y
self._renderImage(self._bmp, self.__startImg, (0,0), (self.__endsExtent, height))
self._renderImage(self._bmp, self.__centerImg,
(-self.__endsExtent,0), (1, height))
endOffset = self._bmp.getSize().x - self.__endsExtent
self._renderImage(self._bmp, self.__endImg,
(-endOffset,0), (self.__endsExtent, height))
class VStretchNode(_StretchNodeBase):
def __init__(self, endsExtent, minExtent=-1, **kwargs):
super(VStretchNode, self).__init__(**kwargs)
(self.__endsExtent, self.__minExtent) = self._checkExtents(endsExtent, minExtent)
self.__startImg = avg.ImageNode(parent=self)
self.__centerImg = avg.ImageNode(parent=self)
self.__endImg = avg.ImageNode(parent=self)
self._initNodes()
def _positionNodes(self, newSize):
if newSize.y < self.__minExtent:
self.height = self.__minExtent
else:
self.__centerImg.y = self.__endsExtent
self.__centerImg.height = newSize.y - self.__endsExtent*2
self.__endImg.y = newSize.y - self.__endsExtent
def _renderImages(self):
width = self._bmp.getSize().x
self._renderImage(self._bmp, self.__startImg, (0,0), (width, self.__endsExtent))
self._renderImage(self._bmp, self.__centerImg,
(0,-self.__endsExtent), (width, 1))
endOffset = self._bmp.getSize().y - self.__endsExtent
self._renderImage(self._bmp, self.__endImg, (0,-endOffset),
(width, self.__endsExtent))
class HVStretchNode(_StretchNodeBase):
def __init__(self, endsExtent, minExtent=(-1,-1), **kwargs):
super(HVStretchNode, self).__init__(**kwargs)
(hEndsExtent, hMinExtent) = self._checkExtents(endsExtent[0], minExtent[0])
(vEndsExtent, vMinExtent) = self._checkExtents(endsExtent[1], minExtent[1])
self.__endsExtent = avg.Point2D(hEndsExtent, vEndsExtent)
self.__minExtent = avg.Point2D(hMinExtent, vMinExtent)
self.__createNodes()
self._initNodes()
def __calcNodePositions(self, newSize):
xPosns = (0, self.__endsExtent[0], newSize.x-self.__endsExtent[0], newSize.x)
yPosns = (0, self.__endsExtent[1], newSize.y-self.__endsExtent[1], newSize.y)
self.__nodePosns = []
for y in range(4):
curRow = []
for x in range(4):
curRow.append(avg.Point2D(xPosns[x], yPosns[y]))
self.__nodePosns.append(curRow)
def __createNodes(self):
self.__nodes = []
for y in range(3):
curRow = []
for x in range(3):
node = avg.ImageNode(parent=self)
curRow.append(node)
self.__nodes.append(curRow)
def _positionNodes(self, newSize):
newSize = avg.Point2D(
max(self.__minExtent.x, newSize.x),
max(self.__minExtent.y, newSize.y))
self.__calcNodePositions(newSize)
for y in range(3):
for x in range(3):
pos = self.__nodePosns[y][x]
size = self.__nodePosns[y+1][x+1] - self.__nodePosns[y][x]
node = self.__nodes[y][x]
node.pos = pos
node.size = size
def _renderImages(self):
bmpSize = self._bmp.getSize()
xPosns = (0, self.__endsExtent[0], bmpSize.x-self.__endsExtent[0], bmpSize.x)
yPosns = (0, self.__endsExtent[1], bmpSize.y-self.__endsExtent[1], bmpSize.y)
for y in range(3):
for x in range(3):
node = self.__nodes[y][x]
pos = avg.Point2D(xPosns[x], yPosns[y])
size = avg.Point2D(xPosns[x+1], yPosns[y+1]) - pos
if x == 1:
size.x = 1
if y == 1:
size.y = 1
self._renderImage(self._bmp, node, -pos, size)
class SwitchNode(avg.DivNode):
def __init__(self, nodeMap=None, visibleid=None, parent=None, **kwargs):
super(SwitchNode, self).__init__(**kwargs)
self.registerInstance(self, parent)
self.__nodeMap = None
if nodeMap:
self.setNodeMap(nodeMap)
if visibleid:
self.setVisibleID(visibleid)
self.subscribe(self.SIZE_CHANGED, self.__setChildSizes)
def setNodeMap(self, nodeMap):
if self.__nodeMap is not None:
raise RuntimeError("SwitchNode.nodeMap can only be set once.")
self.__nodeMap = nodeMap
for node in self.__nodeMap.itervalues():
if node:
# Only insert child if it hasn't been inserted yet.
try:
self.indexOf(node)
except RuntimeError:
self.appendChild(node)
if self.size != (0,0):
size = self.size
else:
key = list(self.__nodeMap.keys())[0]
size = self.__nodeMap[key].size
self.size = size
def getVisibleID(self):
return self.__visibleid
def setVisibleID(self, visibleid):
if not (visibleid in self.__nodeMap):
raise RuntimeError("'%s' is not a registered id." % visibleid)
self.__visibleid = visibleid
for node in self.__nodeMap.itervalues():
node.active = False
self.__nodeMap[visibleid].active = True
visibleid = property(getVisibleID, setVisibleID)
def __setChildSizes(self, newSize):
if self.__nodeMap:
for node in self.__nodeMap.itervalues():
if node:
node.size = newSize
# Hack to support min. size in SwitchNodes containing StretchNodes
if node.size > newSize:
self.size = node.size
return
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