sugar-toolkit-gtk3/sugar/graphics/palette.py

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# Copyright (C) 2007, Eduardo Silva (edsiper@gmail.com)
#
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# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
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import logging
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import gtk
import gobject
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import time
import hippo
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from sugar.graphics import animator
from sugar.graphics import units
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from sugar import _sugarext
_BOTTOM_LEFT = 0
_BOTTOM_RIGHT = 1
_LEFT_BOTTOM = 2
_LEFT_TOP = 3
_RIGHT_BOTTOM = 4
_RIGHT_TOP = 5
_TOP_LEFT = 6
_TOP_RIGHT = 7
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class Palette(gobject.GObject):
AUTOMATIC = 0
BOTTOM = 1
LEFT = 2
RIGHT = 3
TOP = 4
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__gtype_name__ = 'SugarPalette'
__gproperties__ = {
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'invoker' : (object, None, None,
gobject.PARAM_READWRITE),
'position' : (gobject.TYPE_INT, None, None, 0, 5,
0, gobject.PARAM_READWRITE)
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}
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def __init__(self, label, accel_path=None):
gobject.GObject.__init__(self)
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self._position = self.AUTOMATIC
self._palette_popup_sid = None
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self._popup_anim = animator.Animator(0.3, 10)
self._popup_anim.add(_PopupAnimation(self))
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self._secondary_anim = animator.Animator(1.3, 10)
self._secondary_anim.add(_SecondaryAnimation(self))
self._popdown_anim = animator.Animator(0.6, 10)
self._popdown_anim.add(_PopdownAnimation(self))
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self._menu = _sugarext.Menu()
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self._primary = _PrimaryMenuItem(label, accel_path)
self._menu.append(self._primary)
self._primary.show()
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self._separator = gtk.SeparatorMenuItem()
self._menu.append(self._separator)
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self._content = _ContentMenuItem()
self._menu.append(self._content)
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self._button_bar = _ButtonBarMenuItem()
self._menu.append(self._button_bar)
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self._menu.connect('enter-notify-event',
self._enter_notify_event_cb)
self._menu.connect('leave-notify-event',
self._leave_notify_event_cb)
self._menu.connect('button-press-event',
self._button_press_event_cb)
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def set_primary_text(self, label, accel_path=None):
self._primary.set_label(label, accel_path)
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def append_menu_item(self, item):
self._separator.show()
self._menu.insert(item, len(self._menu.get_children()) - 2)
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def insert_menu_item(self, item, index=-1):
self._separator.show()
if index < 0:
self._menu.insert(item, len(self._menu.get_children()) - 2)
else:
self._menu.insert(item, index + 2)
def remove_menu_item(self, index):
if index > len(self._menu.get_children()) - 4:
raise ValueError('index %i out of range' % index)
self._menu.remove(self._menu.get_children()[index + 2])
if len(self._menu.get_children()) == 0:
self._separator.hide()
def menu_item_count(self):
return len(self._menu.get_children()) - 4
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def set_content(self, widget):
self._content.set_widget(widget)
self._content.show()
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def append_button(self, button):
self._button_bar.append_button(button)
self._button_bar.show()
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def do_set_property(self, pspec, value):
if pspec.name == 'invoker':
self._invoker = value
self._invoker.add_listener(self)
elif pspec.name == 'position':
self._position = value
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else:
raise AssertionError
def _get_position(self, alignment):
# Invoker: x, y, width and height
inv_rect = self._invoker.get_rect()
palette_width, palette_height = self._menu.size_request()
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if alignment == _BOTTOM_LEFT:
x = inv_rect.x
y = inv_rect.y + inv_rect.height
elif alignment == _BOTTOM_RIGHT:
x = (inv_rect.x + inv_rect.width) - palette_width
y = inv_rect.y + inv_rect.height
elif alignment == _LEFT_BOTTOM:
x = inv_rect.x - palette_width
y = inv_rect.y
elif alignment == _LEFT_TOP:
x = inv_rect.x - palette_width
y = (inv_rect.y + inv_rect.height) - palette_height
elif alignment == _RIGHT_BOTTOM:
x = inv_rect.x + inv_rect.width
y = inv_rect.y
elif alignment == _RIGHT_TOP:
x = inv_rect.x + inv_rect.width
y = (inv_rect.y + inv_rect.height) - palette_height
elif alignment == _TOP_LEFT:
x = inv_rect.x
y = inv_rect.y - palette_height
elif alignment == _TOP_RIGHT:
x = (inv_rect.x + inv_rect.width) - palette_width
y = inv_rect.y - palette_height
return x, y
def _in_screen(self, x, y):
[width, height] = self._menu.size_request()
screen_width = gtk.gdk.screen_width() - units.grid_to_pixels(1)
screen_height = gtk.gdk.screen_height() - units.grid_to_pixels(1)
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return x + width <= screen_width and \
y + height <= screen_height and \
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x >= units.grid_to_pixels(1) and y >= units.grid_to_pixels(1)
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def _get_automatic_position(self):
alignments = [ _BOTTOM_LEFT, _BOTTOM_RIGHT,
_LEFT_BOTTOM, _LEFT_TOP,
_RIGHT_BOTTOM, _RIGHT_TOP,
_TOP_LEFT, _TOP_RIGHT ]
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for alignment in alignments:
x, y = self._get_position(alignment)
if self._in_screen(x, y):
return x, y
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def _show(self):
x = y = 0
if self._position == self.AUTOMATIC:
x, y = self._get_automatic_position()
elif self._position == self.BOTTOM:
x, y = self._get_position(_BOTTOM_LEFT)
if not self._in_screen(x, y):
x, y = self._get_position(_BOTTOM_RIGHT)
elif self._position == self.LEFT:
x, y = self._get_position(_LEFT_BOTTOM)
if not self._in_screen(x, y):
x, y = self._get_position(_LEFT_TOP)
elif self._position == self.RIGHT:
x, y = self._get_position(_RIGHT_BOTTOM)
if not self._in_screen(x, y):
x, y = self._get_position(_RIGHT_TOP)
elif self._position == self.TOP:
x, y = self._get_position(_TOP_LEFT)
if not self._in_screen(x, y):
x, y = self._get_position(_TOP_RIGHT)
self._palette_popup_sid = _palette_observer.connect('popup',
self._palette_observer_popup_cb)
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self._menu.popup(x, y)
_palette_observer.emit('popup', self)
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def _hide(self):
if not self._palette_popup_sid is None:
_palette_observer.disconnect(self._palette_popup_sid)
self._palette_popup_sid = None
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self._menu.popdown()
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def popup(self):
self._popdown_anim.stop()
self._popup_anim.start()
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self._secondary_anim.start()
def popdown(self):
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self._secondary_anim.stop()
self._popup_anim.stop()
self._popdown_anim.start()
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def invoker_mouse_enter(self):
self.popup()
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def invoker_mouse_leave(self):
self.popdown()
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def _enter_notify_event_cb(self, widget, event):
if event.detail == gtk.gdk.NOTIFY_NONLINEAR:
self._popdown_anim.stop()
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def _leave_notify_event_cb(self, widget, event):
if event.detail == gtk.gdk.NOTIFY_NONLINEAR:
self.popdown()
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def _button_press_event_cb(self, widget, event):
pass
def _palette_observer_popup_cb(self, observer, palette):
if self != palette:
self._hide()
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class _PrimaryMenuItem(gtk.MenuItem):
def __init__(self, label, accel_path):
gtk.MenuItem.__init__(self)
self._set_label(label, accel_path)
def set_label(self, label, accel_path):
self.remove(self._label)
self._set_label(label, accel_path)
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def _set_label(self, label, accel_path):
self._label = gtk.AccelLabel(label)
self._label.set_accel_widget(self)
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if accel_path:
self.set_accel_path(accel_path)
self._label.set_alignment(0.0, 0.5)
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self.add(self._label)
self._label.show()
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class _ContentMenuItem(gtk.MenuItem):
def __init__(self):
gtk.MenuItem.__init__(self)
def set_widget(self, widget):
if self.child:
self.remove(self.child)
self.add(widget)
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def is_empty(self):
return self.child is None
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class _ButtonBarMenuItem(gtk.MenuItem):
def __init__(self):
gtk.MenuItem.__init__(self)
self._hbar = gtk.HButtonBox()
self.add(self._hbar)
self._hbar.show()
def append_button(self, button):
self._hbar.pack_start(button)
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def is_empty(self):
return len(self._hbar.get_children()) == 0
class _PopupAnimation(animator.Animation):
def __init__(self, palette):
animator.Animation.__init__(self, 0.0, 1.0)
self._palette = palette
def next_frame(self, current):
if current == 1.0:
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self._palette._primary.show()
for menu_item in self._palette._menu.get_children()[1:]:
menu_item.hide()
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self._palette._show()
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class _SecondaryAnimation(animator.Animation):
def __init__(self, palette):
animator.Animation.__init__(self, 0.0, 1.0)
self._palette = palette
def next_frame(self, current):
if current == 1.0:
middle_menu_items = self._palette._menu.get_children()
middle_menu_items = middle_menu_items[2:len(middle_menu_items) - 2]
if middle_menu_items or \
not self._palette._content.is_empty() or \
not self._palette._button_bar.is_empty():
self._palette._separator.show()
for menu_item in middle_menu_items:
menu_item.show()
if not self._palette._content.is_empty():
self._palette._content.show()
if not self._palette._button_bar.is_empty():
self._palette._button_bar.show()
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self._palette._show()
class _PopdownAnimation(animator.Animation):
def __init__(self, palette):
animator.Animation.__init__(self, 0.0, 1.0)
self._palette = palette
def next_frame(self, current):
if current == 1.0:
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self._palette._hide()
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class Invoker(object):
def __init__(self):
self._listeners = []
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def add_listener(self, listener):
self._listeners.append(listener)
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def notify_mouse_enter(self):
for listener in self._listeners:
listener.invoker_mouse_enter()
def notify_mouse_leave(self):
for listener in self._listeners:
listener.invoker_mouse_leave()
class WidgetInvoker(Invoker):
def __init__(self, widget):
Invoker.__init__(self)
self._widget = widget
widget.connect('enter-notify-event', self._enter_notify_event_cb)
widget.connect('leave-notify-event', self._leave_notify_event_cb)
def get_rect(self):
win_x, win_y = self._widget.window.get_origin()
rectangle = self._widget.get_allocation()
x = win_x + rectangle.x
y = win_y + rectangle.y
width = rectangle.width
height = rectangle.height
return gtk.gdk.Rectangle(x, y, width, height)
def _enter_notify_event_cb(self, widget, event):
self.notify_mouse_enter()
def _leave_notify_event_cb(self, widget, event):
self.notify_mouse_leave()
class CanvasInvoker(Invoker):
def __init__(self, item):
Invoker.__init__(self)
self._item = item
item.connect('motion-notify-event',
self._motion_notify_event_cb)
def get_rect(self):
context = self._item.get_context()
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if context:
x, y = context.translate_to_screen(self._item)
width, height = self._item.get_allocation()
return gtk.gdk.Rectangle(x, y, width, height)
def _motion_notify_event_cb(self, button, event):
if event.detail == hippo.MOTION_DETAIL_ENTER:
self.notify_mouse_enter()
elif event.detail == hippo.MOTION_DETAIL_LEAVE:
self.notify_mouse_leave()
return False
class _PaletteObserver(gobject.GObject):
__gtype_name__ = 'SugarPaletteObserver'
__gsignals__ = {
'popup': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([object]))
}
def __init__(self):
gobject.GObject.__init__(self)
_palette_observer = _PaletteObserver()