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# Copyright (C) IBM Corporation 2008
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import GObject
from gi.repository import Pango
import cPickle
import copy
from Textbox import Textbox
import logging
SNAP_SENTENCE, SNAP_PARAGRAPH, SNAP_SECTION, SNAP_NONE = range(4)
class Editable_Textbox( Textbox ):
"""
Created by Jonathan Mace
This class implements its own special code for dragging and selecting.
It has an article class which provides the text buffer, and any modifications
to the text buffer are done via the article class.
"""
def __init__(self):
GObject.GObject.__init__(self)
self.set_border_width(1)
self.set_cursor_visible(True)
self.set_editable(True)
self.set_wrap_mode(Gtk.WrapMode.WORD)
self.article = None
self.set_mode(SNAP_SENTENCE)
self.changed = False
self.block = True
self.selecting = False
self.handlers = []
self.modify_font(Pango.FontDescription('arial 9'))
self.ignore_snap_self = True
self.drag_source = False
self.edited = False
self.set_property("left-margin", 5)
logging.debug('########### Editable_Textbox.drag_dest_set')
self.drag_dest_set_target_list(None)
self.drag_dest_add_text_targets()
self.drag_dest_add_image_targets()
def set_article(self, article):
self.article = article
self.set_buffer(article.getBuffer())
def get_article(self):
return self.article
def clear(self):
self.article.delete()
def get_mouse_iter(self, x, y):
click_coords = self.window_to_buffer_coords(Gtk.TextWindowType.TEXT, x, y)
mouseClickPositionIter = self.get_iter_at_location(click_coords[0], click_coords[1])
return mouseClickPositionIter
def set_mode(self, snapto):
self.snapto = snapto
def set_buffer(self, buffer):
for handler in self.handlers:
self.disconnect(handler)
buffer.connect("changed", self.text_changed, None)
Gtk.TextView.set_buffer(self, buffer)
self.handlers = []
self.handlers.append(self.connect("button-press-event", self.clicked_event, None))
self.handlers.append(self.connect("button-release-event", self.unclicked_event, None))
self.handlers.append(self.connect("drag-data-get", self.drag_data_get_event, None))
self.handlers.append(self.connect("drag-begin", self.drag_begin_event, None))
self.handlers.append(self.connect("drag-motion", self.drag_motion_event, None))
self.handlers.append(self.connect("drag-drop", self.drag_drop_event, None))
self.handlers.append(self.connect("drag-leave", self.drag_leave_event, None))
self.handlers.append(self.connect("drag-data-delete", self.drag_data_delete_event, None))
self.handlers.append(self.connect("drag-data-received", self.drag_data_received_event, None))
self.handlers.append(self.connect("drag-end", self.drag_end_event, None))
self.handlers.append(self.connect("motion-notify-event", self.motion_notify, None))
self.handlers.append(self.connect("focus-out-event", self.leave_notify, None))
def text_changed(self, buffer, data):
self.changed = True
self.selecting = False
def motion_notify(self, widget, event, data):
if not self.ignore_snap_self and self.selecting:
""" The following code implements the 'snapping' to sentences etc.
The base class responds to motion notify events and does some unknown (to me)
action which for some reason, must complete, otherwise on some platforms it will
stop any more motion notify events.
So what happens, is the first 'run through' of the motion notify responder emits another
motion notify event, ignores it and lets the base class respond to it. Then when control
is given back to the first emission, we implement our code. The order of events is:
1) motion notify event 1 emitted naturally
2) our class responds to motion notify event 1
3) motion notify event 2 emitted by step 2)
4) our class ignores motion notify event 2
5) the default class acts upon motion notify event 2
6) motion notify event 2 finishes naturally
7) our class does its stuff
8) motion notify event 1 finishes by our class stopping its emission
"""
if self.block == True:
self.stop_emission("motion-notify-event")
self.block = False
self.emit("motion-notify-event", event)
buf = self.get_buffer()
mouseiter = self.get_mouse_iter(int(event.x), int(event.y))
article = self.get_article()
if mouseiter.compare(self.selectionstart) == 1:
if self.snapto == SNAP_SENTENCE:
selectionstart = article.getSentence(self.selectionstart).getStart()
selectionend = article.getSentence(mouseiter).getEnd()
if self.snapto == SNAP_PARAGRAPH:
selectionstart = article.getParagraph(self.selectionstart).getStart()
selectionend = article.getParagraph(mouseiter).getEnd()
if self.snapto == SNAP_SECTION:
selectionstart = article.getSection(self.selectionstart).getStart()
selectionend = article.getSection(mouseiter).getEnd()
else:
if self.snapto == SNAP_SENTENCE:
selectionstart = article.getSentence(mouseiter).getStart()
selectionend = article.getSentence(self.selectionstart).getEnd()
if self.snapto == SNAP_PARAGRAPH:
selectionstart = article.getParagraph(mouseiter).getStart()
selectionend = article.getParagraph(self.selectionstart).getEnd()
if self.snapto == SNAP_SECTION:
selectionstart = article.getSection(mouseiter).getStart()
selectionend = article.getSection(self.selectionstart).getEnd()
self.scroll_to_iter(mouseiter, 0)
article.highlight(selectionstart, selectionend)
else:
self.block = True
def clicked_event(self, widget, event, data):
if event.type == Gdk.EventType._2BUTTON_PRESS or event.type == Gdk.EventType._3BUTTON_PRESS:
self.stop_emission("button_press_event")
return
if event.button == 3:
self.stop_emission("button_press_event")
return
if self.changed == True:
buf = self.get_buffer()
article = self.get_article()
article.checkIntegrity()
self.changed = False
if not self.get_buffer().get_has_selection():
result = self.do_button_press_event(widget, event)
a = self.article
loc_iter = self.get_mouse_iter(int(event.x), int(event.y))
self.selecting = True
self.selectionstart = loc_iter
self.stop_emission("button-press-event")
return result
else:
buf = self.get_buffer()
bounds = buf.get_selection_bounds()
if bounds == ():
return
start = bounds[0]
end = bounds[1]
if start.compare(end) == 1:
start, end = end, start
loc = self.get_mouse_iter(int(event.x), int(event.y))
if start.compare(loc) == 1 or loc.compare(end) == 1:
self.do_button_press_event(widget, event)
a = self.article
self.selecting = True
self.selectionstart = loc
self.stop_emission("button-press-event")
def leave_notify(self, widget, event, data):
if self.changed == True:
offset = self.get_buffer().get_property("cursor-position")
self.article.checkIntegrity()
newbuf = self.article.getBuffer()
self.set_buffer(newbuf)
self.changed = False
iter = newbuf.get_iter_at_offset(offset)
newbuf.place_cursor(iter)
def unclicked_event(self, widget, event, data):
if self.snapto != SNAP_NONE:
self.article.clearArrow()
self.do_button_release_event(widget, event)
self.selecting = False
return True
else:
return False
def drag_begin_event(self, widget, context, data):
logging.debug('############ Editable_Textbox.drag_begin_event')
self.grab_focus()
if self.snapto != SNAP_NONE:
a = self.article
a.rememberSelection()
self.drag_source = True
def drag_drop_event(self, widget, context, x, y, time, data):
if self.snapto != SNAP_NONE:
self.article.clearArrow()
self.set_cursor_visible(True)
def drag_motion_event(self, widget, drag_context, x, y, time, data):
if self.snapto != SNAP_NONE and not self.ignore_snap_self or (not self.drag_source and self.ignore_snap_self):
self.delete_on_fail = False
self.set_cursor_visible(False)
a = self.article
loc_iter = self.get_mouse_iter(x, y)
if self.snapto == SNAP_SENTENCE:
a.mark(a.getBestSentence(loc_iter).getStart())
#a.markSentence(loc_iter)
if self.snapto == SNAP_PARAGRAPH:
a.mark(a.getBestParagraph(loc_iter).getStart())
#a.markParagraph(loc_iter)
if self.snapto == SNAP_SECTION:
a.mark(a.getBestSection(loc_iter).getStart())
#a.markSection(loc_iter)
result = self.do_drag_motion(widget, drag_context, x, y, time)
self.stop_emission("drag-motion")
return result
self.changed = False
else:
self.set_cursor_visible(True)
self.drag_source = True
def drag_leave_event(self, widget, context, time, data):
if self.snapto != SNAP_NONE and not self.ignore_snap_self or (not self.drag_source and self.ignore_snap_self):
self.delete_on_fail = True
self.article.clearArrow()
self.do_drag_leave(widget, context, time)
self.stop_emission("drag-leave")
self.changed = False
self.set_cursor_visible(True)
def drag_data_delete_event(self, widget, context, data):
if self.snapto != SNAP_NONE and not self.ignore_snap_self or (not self.drag_source and self.ignore_snap_self):
a = self.article
a.deleteDragSelection()
self.stop_emission("drag-data-delete")
self.changed = False
def drag_data_received_event(self, widget, context, x, y, selection_data, info, time, data):
logging.debug('################ Editable_Textbox.drag_data_received_event')
if self.snapto != SNAP_NONE and not self.ignore_snap_self or (not self.drag_source and self.ignore_snap_self):
a = self.article
insert_loc = self.get_mouse_iter(x, y)
data_received_type = str(selection_data.get_data_type())
data = cPickle.loads(str(selection_data.get_data()))
if data_received_type == "sentence":
bestpoint = insert_loc
if data_received_type == "paragraph":
bestpoint = a.getBestParagraph(insert_loc).getStart()
if data_received_type == "section":
bestpoint = a.getBestSection(insert_loc).getStart()
a.insert(data, insert_loc)
self.stop_emission("drag-data-received")
context.finish(True, True, time)
self.grab_focus()
def drag_data_get_event(self, widget, context, selection_data, info, time, data):
logging.debug('############### Editable_Textbox.drag_data_get_event')
if not self.ignore_snap_self and self.snapto != SNAP_NONE:
a = self.article
if self.snapto == SNAP_SENTENCE:
atom = Gdk.atom_intern("sentence", only_if_exists=False)
if self.snapto == SNAP_PARAGRAPH:
atom = Gdk.atom_intern("paragraph", only_if_exists=False)
if self.snapto == SNAP_SECTION:
atom = Gdk.atom_intern("section", only_if_exists=False)
string = cPickle.dumps(a.getSelection())
selection_data.set(atom, 8, string)
self.stop_emission("drag-data-get")
def drag_end_event(self, widget, context, data):
self.drag_source = False
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