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