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path: root/J2JToolbar.py
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import gtk, gst, thread, tempfile, time, os
import pygame
import olpcgames
from gettext import gettext as _
from sugar.graphics.toolbutton import ToolButton
from sugar.graphics.toolcombobox import ToolComboBox
import logging

log = logging.getLogger('City run')
log.setLevel(logging.DEBUG)

ImagePath = os.path.dirname(os.path.abspath(__file__)) + "/City/Images"

GST_PIPE = ['v4l2src', 'ffmpegcolorspace', 'pngenc']

class readScenes(object):
    def __init__(self, scpath):
        self.scpath = scpath
        self.scene_names = [dir for dir in os.listdir(self.scpath) if os.path.isdir(self.scpath + '/' + dir)]
        self.scene_data = []
        for n in self.scene_names:
            fp = self.scpath + "/" + n            
            mdfile = [open(fp + '/' + f) for f in os.listdir(fp) if os.path.isfile(fp + "/" + f) and f.startswith(n)]
            if mdfile:
                result = {"Name":n}
                defaults = {}
                for line in mdfile[0]:
                    if line.startswith('#') or line.startswith('\n'):
                        pass
                    else:
                        keyvals = line.split('=')
                        if len(keyvals) == 2:
                            key = keyvals[0].upper() 
                            val = (keyvals[1][:-1] if keyvals[1][-1] == '\n' else keyvals[1])
                            if key.startswith('TEMPO'):
                                result['Tempo'] = val.replace(' ','')
                            elif key.startswith('KEY'):
                                result['Key'] = val.replace(' ','')
                            elif key.startswith('MODE'):
                                result['Mode'] = val.replace(' ','')
                            else:
                                pass
                        else:
                            raise IOError, "Bad Scene Meta Data file: %s" %keyvals
                result['Defaults'] = {}
                self.scene_data.append(result)
            else:
                raise IOError, "Can't find Meta Data file in %s Scene" %n
    def scene_instruct(self, name):
        "returns a list of strings suitable to give to a ScenePlayer object for creating a scene"
        for scd in self.scene_data:
            if scd['Name'] == name:
                collected = [name]
                for k in ['Key', 'Mode', 'Tempo', 'Defaults']:
                    try:
                        collected.append(str(scd[k]))
                    except KeyError:
                        collected.append('None')                
                return collected
    def get_scene_list(self):
        "returns a list of scene strings for the toolbar, with City as the default"
        ordered_names = self.scene_names[:]
        if 'City' in ordered_names:
            ordered_names.insert(0,ordered_names.pop(ordered_names.index('City')))
        return [self.scene_instruct(s) for s in ordered_names]

class CameraSnap(object):
    """A class representing the OLPC camera."""
    def __init__(self):
        log.info("CameraSnap init")
        snap_file, self.snap_path = tempfile.mkstemp(suffix = '.png')
        pipe = GST_PIPE + ['filesink location=%s' % self.snap_path]
        self.pipe = gst.parse_launch('!'.join(pipe))
        self.bus = self.pipe.get_bus()
        log.info("tempfile is %s " %self.snap_path)
    def Snap(self):
        """Take a snapshot."""
        log.info("about to set pipe state to PLAY")
        self.pipe.set_state(gst.STATE_PLAYING)
        log.info("about to poll")
        thread.start_new_thread(self.bus.poll, (gst.MESSAGE_EOS, -1))
        for i in xrange(60):
            time.sleep(0.18)
            if os.path.getsize(self.snap_path) > 0: break
        else: raise IOError, "Error writing camera snap to file"
        return self.snap_path
    def Stop(self):
        self.pipe.set_state(gst.STATE_NULL)

    
class Jam2JamToolBar(gtk.Toolbar):
    def __init__(self, activity):
        gtk.Toolbar.__init__(self)
        self.activity = activity
        self.parameters = ['Density', 'Pitch', 'Length', 'Timbre', 'Volume'] # no tempo here.
        scene_stuff = readScenes(self.activity._ScenePath)
        self.scenes = scene_stuff.get_scene_list()
        print "SCENE DATA IS ", self.scenes
        #self.scenes = [['City', 'A', 'minor pentatonic'], ['City', 'G#', 'major']] #this data needs to be obtained from directories
        self.play_pause_state = 'Playing'
        self.scene_init = True
        
        # Separator
        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        self.insert(separator, -1)

        #Horizontal Parameter control combobox
        self._add_widget(gtk.Label(_('Horizontal:')))
        self._Hparameter_combo = ToolComboBox()
        for i, f in enumerate(self.parameters):
            self._Hparameter_combo.combo.append_item(i, f)
        self._Hparameter_combo.combo.connect('changed', self._Hparameter_change_cb)
        self._add_widget(self._Hparameter_combo)
        self._Hparameter_combo.combo.set_active(0)

        # Separator
        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.show()
        self.insert(separator, -1)

        #Vertical Parameter control combobox
        self._add_widget(gtk.Label(_('Vertical:')))
        self._Vparameter_combo = ToolComboBox()
        for j, k in enumerate(self.parameters):
            self._Vparameter_combo.combo.append_item(j, k)
        self._Vparameter_combo.combo.connect('changed', self._Vparameter_change_cb)
        self._add_widget(self._Vparameter_combo)
        self._Vparameter_combo.combo.set_active(1)

        # Separator
        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.show()
        self.insert(separator, -1)


        #Scene Selection control combobox
        self._add_widget(gtk.Label(_('Scene:')))
        self._Scene_combo = ToolComboBox()
        for l, m in enumerate(self.scenes):
            self._Scene_combo.combo.append_item(l, m[0])
        self._Scene_combo.combo.connect('changed', self._Scene_change_cb)
        self._add_widget(self._Scene_combo)
        #ought to do this safely somehow.
        self._Scene_combo.combo.set_active(0)
        self.scene_init = False

        # Separator
        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.show()
        self.insert(separator, -1)

        
        #Camera Button
        self.camera_ready = True
        camera_icon = ImagePath + "/camera-external.svg"
        camera_busy_icon = ImagePath + "/camera-busy.svg"        
        self.camera_image, self.camera_busy_image = gtk.Image(), gtk.Image()
        self.camera_image.set_from_file(camera_icon)
        self.camera_busy_image.set_from_file(camera_busy_icon)
        self.camera_image.show()
        #camera_busy_image.show()
        self._cameraButton = ToolButton()
        self._cameraButton.set_icon_widget(self.camera_image)
        self._cameraButton.connect('clicked', self._cameraSnap_cb)
        self._cameraButton.set_tooltip(_('Snapshot'))
        self.insert(self._cameraButton, -1)
        self._cameraButton.show()

        # Separator
        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.show()
        self.insert(separator, -1)

        #Play/Pause Button
        pause_icon = ImagePath + "/media-playback-pause.svg"
        play_icon = ImagePath + "/media-playback-start.svg"
        self.pause_image = gtk.Image()
        self.pause_image.set_from_file(pause_icon)
    
        self.play_image = gtk.Image()
        self.play_image.set_from_file(play_icon)

        self._pauseButton = ToolButton()
        self._pauseButton.connect('clicked', self._pause_cb)
        self.pause_image.show()
        self._pauseButton.set_icon_widget(self.pause_image)
        self._pauseButton.set_tooltip(_('Pause'))
        #self._toggleplay_pause()
        self.insert(self._pauseButton, -1)
        self._pauseButton.show()

        # Separator
        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.show()
        self.insert(separator, -1)


    def _add_widget(self, widget, expand=False):
        tool_item = gtk.ToolItem()
        tool_item.set_expand(expand)
        tool_item.add(widget)
        widget.show()
        self.insert(tool_item, -1)
        tool_item.show()

    def _toggleplay_pause(self):
        if self.play_pause_state == "Playing":
            self.activity.jamScene.music_player.pause()
            self.play_image.show()
            self._pauseButton.set_icon_widget(self.play_image)
            self._pauseButton.set_tooltip(_('Play'))
            self.play_pause_state = "Paused"
        else:
            self.activity.jamScene.music_player.resume()
            self.pause_image.show()
            self._pauseButton.set_icon_widget(self.pause_image)
            self._pauseButton.set_tooltip(_('Pause'))
            self.play_pause_state = "Playing"
        try:
            self.activity._pgc.grab_focus()
        except AttributeError:
            pass

    def _show_busy_camera(self):
        self.camera_ready = False
        self.camera_busy_image.show()
        self._cameraButton.set_icon_widget(self.camera_busy_image)
        self._cameraButton.set_tooltip(_('Please wait...'))

    def _show_active_camera(self):
        self.camera_image.show()
        self._cameraButton.set_icon_widget(self.camera_image)
        self._cameraButton.set_tooltip(_('Snap'))
        self.camera_ready = True
        
    def _Hparameter_change_cb(self, widget):
        param = "Parameter|Horizontal|" + self.parameters[self._Hparameter_combo.combo.get_active()]
        olpcgames.eventwrap.post(olpcgames.eventwrap.Event(pygame.USEREVENT, action=param))
        try:
            self.activity._pgc.grab_focus()
        except AttributeError:
            pass

    def _Vparameter_change_cb(self, widget):
        param = "Parameter|Vertical|" + self.parameters[self._Vparameter_combo.combo.get_active()]
        olpcgames.eventwrap.post(olpcgames.eventwrap.Event(pygame.USEREVENT, action=param))
        try:
            self.activity._pgc.grab_focus()
        except AttributeError:
            pass

    def _Scene_change_cb(self, widget):
        if self.scene_init:
            pass
        else:
            selection = self.scenes[self._Scene_combo.combo.get_active()]
            scene = "Reload|" + '|'.join(map(lambda x: str(x), selection))
            olpcgames.eventwrap.post(olpcgames.eventwrap.Event(pygame.USEREVENT, action=scene))
            try:
                self.activity._pgc.grab_focus()
            except AttributeError:
                pass

            ### functions to assist calls from pygame
    def deactivate_scene_change(self):
        self._Scene_combo.set_sensitive(False)
    def reactivate_scene_change(self):
        self._Scene_combo.set_sensitive(True)
    def set_horizontal_parameter(self, param):
        ndx = self.parameters.index(param)
        self._Hparameter_combo.combo.set_active(ndx)
    def set_vertical_parameter(self, param):
        ndx = self.parameters.index(param)
        self._Vparameter_combo.combo.set_active(ndx)
        
    def _cameraSnap_cb(self, widget):
        "Here I could wrap a camera event..."
        def snaptime():
            snap = CameraSnap()
            self.activity.cameras_loaded.append(snap)
            picpath = snap.Snap()
            self.activity.load_image(picpath)
            snap.Stop()
            self._show_active_camera()
        self.activity._pgc.grab_focus()
        if self.camera_ready:
            self._show_busy_camera()
            thread.start_new_thread(snaptime, ())
        else:
            log.info('Ignoring request to use camera, as camera is currently busy')

    def _pause_cb(self, widget):
        self._toggleplay_pause()
        log.info("Play/Pause Button pressed")