terminator/terminatorlib/paned.py

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#!/usr/bin/python
# Terminator by Chris Jones <cmsj@tenshu.net>
# GPL v2 only
"""paned.py - a base Paned container class and the vertical/horizontal
variants"""
import gobject
import gtk
from util import dbg, err
from newterminator import Terminator
from terminal import Terminal
from container import Container
# pylint: disable-msg=R0921
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# pylint: disable-msg=E1101
class Paned(Container):
"""Base class for Paned Containers"""
def __init__(self):
"""Class initialiser"""
self.terminator = Terminator()
Container.__init__(self)
self.signals.append({'name': 'resize-term',
'flags': gobject.SIGNAL_RUN_LAST,
'return_type': gobject.TYPE_NONE,
'param_types': (gobject.TYPE_STRING,)})
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# pylint: disable-msg=W0613
def set_initial_position(self, widget, event):
"""Set the initial position of the widget"""
if isinstance(self, gtk.VPaned):
position = self.allocation.height / 2
else:
position = self.allocation.width / 2
dbg("Paned::set_initial_position: Setting position to: %d" % position)
self.set_position(position)
self.disconnect(self.cnxids['init'])
del(self.cnxids['init'])
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# pylint: disable-msg=W0613
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def split_axis(self, widget, vertical=True, sibling=None):
"""Default axis splitter. This should be implemented by subclasses"""
self.remove(widget)
if vertical:
container = VPaned()
else:
container = HPaned()
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if not sibling:
sibling = Terminal()
self.terminator.register_terminal(sibling)
sibling.spawn_child()
self.add(container)
self.show_all()
container.add(widget)
container.add(sibling)
self.show_all()
def add(self, widget):
"""Add a widget to the container"""
if len(self.children) == 0:
self.pack1(widget, True, True)
self.children.append(widget)
elif len(self.children) == 1:
if self.get_child1():
self.pack2(widget, True, True)
else:
self.pack1(widget, True, True)
self.children.append(widget)
else:
raise ValueError('Paned widgets can only have two children')
self.cnxids[widget] = []
if isinstance(widget, Terminal):
top_window = self.get_top_window(self)
# FIXME: somehow propagate the title-change signal to the Window
signals = {'close-term': self.wrapcloseterm,
'split-horiz': self.split_horiz,
'split-vert': self.split_vert,
'resize-term': self.resizeterm,
'zoom': top_window.zoom}
for signal in signals:
self.connect_child(widget, signal, signals[signal])
self.connect_child(widget, 'maximise', top_window.zoom,
False)
widget.grab_focus()
elif isinstance(widget, gtk.Paned):
try:
self.connect_child(widget, 'resize-term', self.resizeterm)
except TypeError:
err('Paned::add: %s has no signal resize-term' % widget)
def remove(self, widget):
"""Remove a widget from the container"""
gtk.Paned.remove(self, widget)
self.disconnect_child(widget)
self.children.remove(widget)
return(True)
def wrapcloseterm(self, widget):
"""A child terminal has closed, so this container must die"""
if self.closeterm(widget):
parent = self.get_parent()
parent.remove(self)
# At this point we only have one child, which is the surviving term
sibling = self.children[0]
self.remove(sibling)
parent.add(sibling)
del(self)
else:
dbg("Paned::wrapcloseterm: self.closeterm failed")
def hoover(self):
"""Check that we still have a reason to exist"""
if len(self.children) == 1:
dbg('Paned::hoover: We only have one child, die')
parent = self.get_parent()
parent.remove(self)
child = self.children[0]
self.remove(child)
parent.add(child)
del(self)
def resizeterm(self, widget, keyname):
"""Handle a keyboard event requesting a terminal resize"""
if keyname in ['up', 'down'] and isinstance(self, gtk.VPaned):
# This is a key we can handle
position = self.get_position()
if isinstance(widget, Terminal):
fontheight = widget.vte.get_char_height()
else:
fontheight = 10
if keyname == 'up':
self.set_position(position - fontheight)
else:
self.set_position(position + fontheight)
elif keyname in ['left', 'right'] and isinstance(self, gtk.HPaned):
# This is a key we can handle
position = self.get_position()
if isinstance(widget, Terminal):
fontwidth = widget.vte.get_char_width()
else:
fontwidth = 10
if keyname == 'left':
self.set_position(position - fontwidth)
else:
self.set_position(position + fontwidth)
else:
# This is not a key we can handle
self.emit('resize-term', keyname)
class HPaned(Paned, gtk.HPaned):
"""Merge gtk.HPaned into our base Paned Container"""
def __init__(self):
"""Class initialiser"""
Paned.__init__(self)
gtk.HPaned.__init__(self)
self.register_signals(HPaned)
self.cnxids['init'] = self.connect('expose-event',
self.set_initial_position)
class VPaned(Paned, gtk.VPaned):
"""Merge gtk.VPaned into our base Paned Container"""
def __init__(self):
"""Class initialiser"""
Paned.__init__(self)
gtk.VPaned.__init__(self)
self.register_signals(VPaned)
self.cnxids['init'] = self.connect('expose-event',
self.set_initial_position)
gobject.type_register(HPaned)
gobject.type_register(VPaned)
# vim: set expandtab ts=4 sw=4: