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import logging
import hippo
import gtk
from sugar import util
from sugar.graphics import style
from view.clipboardicon import ClipboardIcon
from sugar.clipboard import clipboardservice
class _ContextMap:
"""Maps a drag context to the clipboard object involved in the dragging."""
def __init__(self):
self._context_map = {}
def add_context(self, context, object_id, data_types):
"""Establishes the mapping. data_types will serve us for reference-
counting this mapping.
"""
self._context_map[context] = [object_id, data_types]
def get_object_id(self, context):
"""Retrieves the object_id associated with context.
Will release the association when this function was called as many times
as the number of data_types that this clipboard object contains.
"""
[object_id, data_types_left] = self._context_map[context]
data_types_left = data_types_left - 1
if data_types_left == 0:
del self._context_map[context]
else:
self._context_map[context] = [object_id, data_types_left]
return object_id
def has_context(self, context):
return context in self._context_map
class ClipboardBox(hippo.CanvasBox):
def __init__(self, menu_shell):
hippo.CanvasBox.__init__(self)
self._menu_shell = menu_shell
self._icons = {}
self._context_map = _ContextMap()
self._pressed_button = None
self._press_start_x = None
self._press_start_y = None
cb_service = clipboardservice.get_instance()
cb_service.connect('object-added', self._object_added_cb)
cb_service.connect('object-deleted', self._object_deleted_cb)
cb_service.connect('object-state-changed', self._object_state_changed_cb)
def _get_icon_at_coords(self, x, y):
for object_id, icon in self._icons.iteritems():
[icon_x, icon_y] = self.get_position(icon)
[icon_width, icon_height] = icon.get_allocation()
if (x >= icon_x ) and (x <= icon_x + icon_width) and \
(y >= icon_y ) and (y <= icon_y + icon_height):
return icon
return None
def _add_selection(self, object_id, selection):
if selection.data:
logging.debug('ClipboardBox: adding type ' + selection.type + '.')
cb_service = clipboardservice.get_instance()
cb_service.add_object_format(object_id,
selection.type,
selection.data,
on_disk = False)
def _object_added_cb(self, cb_service, object_id, name):
icon = ClipboardIcon(self._menu_shell, object_id, name)
style.apply_stylesheet(icon, 'frame.BuddyIcon')
self.append(icon)
self._icons[object_id] = icon
logging.debug('ClipboardBox: ' + object_id + ' was added.')
def _object_deleted_cb(self, cb_service, object_id):
icon = self._icons[object_id]
self.remove(icon)
del self._icons[object_id]
logging.debug('ClipboardBox: ' + object_id + ' was deleted.')
def _object_state_changed_cb(self, cb_service, object_id, name, percent,
icon_name, preview):
icon = self._icons[object_id]
icon.set_state(name, percent, icon_name, preview)
logging.debug('ClipboardBox: ' + object_id + ' state was changed.')
def drag_motion_cb(self, widget, context, x, y, time):
logging.debug('ClipboardBox._drag_motion_cb')
context.drag_status(gtk.gdk.ACTION_COPY, time)
return True
def drag_drop_cb(self, widget, context, x, y, time):
logging.debug('ClipboardBox._drag_drop_cb')
object_id = util.unique_id()
self._context_map.add_context(context, object_id, len(context.targets))
cb_service = clipboardservice.get_instance()
cb_service.add_object(object_id, name="")
for target in context.targets:
if str(target) not in ('TIMESTAMP', 'TARGETS', 'MULTIPLE'):
widget.drag_get_data(context, target, time)
cb_service.set_object_percent(object_id, percent = 100)
return True
def drag_data_received_cb(self, widget, context, x, y, selection, targetType, time):
logging.debug('ClipboardBox: got data for target ' + selection.target)
if selection:
object_id = self._context_map.get_object_id(context)
self._add_selection(object_id, selection)
else:
logging.warn('ClipboardBox: empty selection for target ' + selection.target)
# If it's the last target to be processed, finish the dnd transaction
if not self._context_map.has_context(context):
context.finish(True, False, time)
def drag_data_get_cb(self, widget, context, selection, targetType, eventTime):
logging.debug("drag_data_get_cb: requested target " + selection.target)
object_id = self._last_clicked_icon.get_object_id()
cb_service = clipboardservice.get_instance()
data = cb_service.get_object_data(object_id, selection.target)
selection.set(selection.target, 8, data)
def button_press_event_cb(self, widget, event):
logging.debug("button_press_event_cb")
if event.button == 1 and event.type == gtk.gdk.BUTTON_PRESS:
self._last_clicked_icon = self._get_icon_at_coords(event.x, event.y)
if self._last_clicked_icon:
self._pressed_button = event.button
self._press_start_x = event.x
self._press_start_y = event.y
return True;
def motion_notify_event_cb(self, widget, event):
if not self._pressed_button:
return True
# if the mouse button is not pressed, no drag should occurr
if not event.state & gtk.gdk.BUTTON1_MASK:
self._pressed_button = None
return True
logging.debug("motion_notify_event_cb")
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x = event.x
y = event.y
state = event.state
if widget.drag_check_threshold(int(self._press_start_x),
int(self._press_start_y),
int(x),
int(y)):
targets = self._get_targets_for_dnd(
self._last_clicked_icon.get_object_id())
context = widget.drag_begin(targets,
gtk.gdk.ACTION_COPY,
1,
event);
return True
def drag_end_cb(self, widget, drag_context):
logging.debug("drag_end_cb")
self._pressed_button = None
def _get_targets_for_dnd(self, object_id):
cb_service = clipboardservice.get_instance()
(name, percent, icon, preview, format_types) = \
cb_service.get_object(object_id)
targets = []
for format_type in format_types:
targets.append((format_type, 0, 0))
logging.debug(str(targets))
return targets
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