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#!/usr/bin/env python
# -*- 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
# Original author of this file is Sebastian Maulbeck
# <sm (at) archimedes-solutions (dot) de>
'''
Multitouch emulation helper, supporting pinch gestures
'''
from libavg import avg, Point2D, player
class MTemu(object):
MOUSE_STATE_UP = 'MOUSE_STATE_UP'
MOUSE_STATE_DOWN = 'MOUSE_STATE_DOWN'
def __init__(self):
self.__mouseState = self.MOUSE_STATE_UP
self.__cursorID = 0
self.__dualTouch = False
self.__secondTouch = False
self.__source = avg.Event.TOUCH
self.__oldEventHook = player.getEventHook()
player.setEventHook(self.__onEvent)
root = player.getRootNode()
self.__caption = avg.WordsNode(pos=(root.size.x - 15, root.size.y - 20),
alignment = 'right',
color='DDDDDD',
sensitive=False,
fontsize=14,
parent=root)
self.__updateCaption()
def deinit(self):
player.setEventHook(self.__oldEventHook)
self.__caption.unlink()
if self.__mouseState == self.MOUSE_STATE_DOWN:
self.__releaseTouch(self.__cursorID)
if self.__secondTouch:
self.__releaseTouch(self.__cursorID+1)
def toggleSource(self):
'''
Switch between avg.Event.TOUCH and avg.Event.TRACK - source
'''
self.__clearSourceState()
self.__source = (avg.Event.TOUCH if self.__source == avg.Event.TRACK
else avg.Event.TRACK)
self.__updateCaption()
def toggleDualTouch(self):
self.__dualTouch = not(self.__dualTouch)
self.__clearDualtouchState()
def enableDualTouch(self):
self.__dualTouch = True
self.__clearDualtouchState()
def disableDualTouch(self):
self.__dualTouch = False
self.__clearDualtouchState()
def __clearSourceState(self):
if self.__mouseState == self.MOUSE_STATE_DOWN:
self.__releaseTouch(self.__cursorID)
if self.__secondTouch:
self.__releaseTouch(self.__cursorID+1)
self.__mouseState = self.MOUSE_STATE_UP
self.__secondTouch = False
def __clearDualtouchState(self):
if self.__mouseState == self.MOUSE_STATE_DOWN:
if self.__secondTouch:
self.__releaseTouch(self.__cursorID+1)
else:
self.__sendFakeTouch(self.__cursorID+1, Point2D(0,0),
avg.Event.CURSOR_DOWN, mirror=True)
self.__secondTouch = not(self.__secondTouch)
def __updateCaption(self):
self.__caption.text = 'Multitouch emulation (%s source)' % self.__source
def __onEvent(self, event):
if event.source == avg.Event.MOUSE:
if event.type == avg.Event.CURSOR_DOWN:
self.__onMouseDown(event)
elif event.type == avg.Event.CURSOR_MOTION:
self.__onMouseMotion(event)
elif event.type == avg.Event.CURSOR_UP:
self.__onMouseUp(event)
return True
else:
return False
def __onMouseDown(self, event):
self._initialPos = event.pos
if self.__mouseState == self.MOUSE_STATE_UP and event.button == 1:
self.__sendFakeTouch(self.__cursorID, event.pos, event.type)
if self.__dualTouch and not self.__secondTouch:
self.__sendFakeTouch(self.__cursorID+1, event.pos, event.type,
True)
self.__secondTouch = True
self.__mouseState = self.MOUSE_STATE_DOWN
def __onMouseMotion(self, event):
if self.__mouseState == self.MOUSE_STATE_DOWN:
self.__sendFakeTouch(self.__cursorID, event.pos, event.type)
if self.__dualTouch and self.__secondTouch:
self.__sendFakeTouch(self.__cursorID+1, event.pos,
event.type, True)
def __onMouseUp(self, event):
if self.__mouseState == self.MOUSE_STATE_DOWN and event.button == 1:
self.__sendFakeTouch(self.__cursorID, event.pos, event.type)
if self.__dualTouch and self.__secondTouch:
self.__sendFakeTouch(self.__cursorID+1, event.pos,
event.type, True)
self.__secondTouch = False
self.__mouseState = self.MOUSE_STATE_UP
self.__cursorID += 2 #Even for left uneven for right touch
def __sendFakeTouch(self, cursorID, pos, touchType, mirror=False):
offset = Point2D(0,0)
if self.__dualTouch:
offset = Point2D(40, 0)
if mirror:
pos = 2*(self._initialPos)-pos
offset = -offset
player.getTestHelper().fakeTouchEvent(cursorID,
touchType, self.__source, self.__clampPos(pos+offset))
def __releaseTouch(self, cursorID):
self.__sendFakeTouch(cursorID, Point2D(0,0), avg.Event.CURSOR_UP)
def __clampPos(self, pos):
if pos[0] < 0:
pos[0] = 0
if pos[1] < 0:
pos[1] = 0
if pos[0] >= player.getRootNode().size[0]:
pos[0] = player.getRootNode().size[0]-1
if pos[1] >= player.getRootNode().size[1]:
pos[1] = player.getRootNode().size[1]-1
return pos
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