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 gtk
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from gtk import gdk, keysyms
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import gobject
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import time
import hippo
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ALIGNMENT_AUTOMATIC = 0
ALIGNMENT_BOTTOM_LEFT = 1
ALIGNMENT_BOTTOM_RIGHT = 2
ALIGNMENT_LEFT_BOTTOM = 3
ALIGNMENT_LEFT_TOP = 4
ALIGNMENT_RIGHT_BOTTOM = 5
ALIGNMENT_RIGHT_TOP = 6
ALIGNMENT_TOP_LEFT = 7
ALIGNMENT_TOP_RIGHT = 8
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class Palette(gtk.Window):
__gtype_name__ = 'SugarPalette'
__gproperties__ = {
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'invoker' : (object, None, None,
gobject.PARAM_READWRITE),
'alignment' : (gobject.TYPE_INT, None, None, 0, 8,
ALIGNMENT_AUTOMATIC,
gobject.PARAM_READWRITE)
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}
_PADDING = 1
_WIN_BORDER = 5
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def __init__(self, **kwargs):
gobject.GObject.__init__(self, type=gtk.WINDOW_POPUP, **kwargs)
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gtk.Window.__init__(self)
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self._alignment = ALIGNMENT_AUTOMATIC
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self._palette_label = gtk.Label()
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self._palette_label.show()
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vbox = gtk.VBox(False, 0)
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vbox.pack_start(self._palette_label, True, True, self._PADDING)
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self._separator = gtk.HSeparator()
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self._menu_bar = gtk.MenuBar()
self._menu_bar.set_pack_direction(gtk.PACK_DIRECTION_TTB)
self._content = gtk.HBox()
self._button_bar = gtk.HButtonBox()
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# Set main container
vbox.pack_start(self._separator, True, True, self._PADDING)
vbox.pack_start(self._menu_bar, True, True, self._PADDING)
vbox.pack_start(self._content, True, True, self._PADDING)
vbox.pack_start(self._button_bar, True, True, self._PADDING)
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vbox.show()
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self.add(vbox)
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# Widget events
self.connect('enter-notify-event', self._mouse_over_widget_cb)
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self.connect('leave-notify-event', self._mouse_out_widget_cb)
self.connect('button-press-event', self._close_palette_cb)
self.connect('key-press-event', self._on_key_press_event_cb)
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self.set_border_width(self._WIN_BORDER)
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def do_set_property(self, pspec, value):
if pspec.name == 'invoker':
self._invoker = value
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elif pspec.name == 'alignment':
self._alignment = value
else:
raise AssertionError
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def place(self):
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# Automatic Alignment
if self._alignment == ALIGNMENT_AUTOMATIC:
# Trying Different types of ALIGNMENTS,
# and return the choosen one
if self._try_position(ALIGNMENT_BOTTOM_LEFT):
return ALIGNMENT_BOTTOM_LEFT
elif self._try_position(ALIGNMENT_BOTTOM_RIGHT):
return ALIGNMENT_BOTTOM_RIGHT
elif self._try_position(ALIGNMENT_LEFT_BOTTOM):
return ALIGNMENT_LEFT_BOTTOM
elif self._try_position(ALIGNMENT_LEFT_TOP):
return ALIGNMENT_LEFT_TOP
elif self._try_position(ALIGNMENT_RIGHT_BOTTOM):
return ALIGNMENT_RIGHT_BOTTOM
elif self._try_position(ALIGNMENT_RIGHT_TOP):
return ALIGNMENT_RIGHT_TOP
elif self._try_position(ALIGNMENT_TOP_LEFT):
return ALIGNMENT_TOP_LEFT
elif self._try_position(ALIGNMENT_TOP_RIGHT):
return ALIGNMENT_TOP_RIGHT
else:
# Manual Alignment
move_x, move_y = self._calc_position(self._alignment)
self.move(move_x, move_y)
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def _try_position(self, alignment):
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screen_width = gtk.gdk.screen_width()
screen_height = gtk.gdk.screen_height()
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move_x, move_y = self._calc_position(alignment)
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self._width, self._height = self.size_request()
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plt_x, plt_y = self.window.get_origin()
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if move_x > plt_x:
plt_x += (move_x - plt_x)
else:
plt_x -= (plt_x - move_x)
if move_y > plt_y:
plt_y += (move_y - plt_y)
else:
plt_y -= (plt_y - move_y)
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if (plt_x < 0 or plt_x + self._width > screen_width) or \
(plt_y < 0 or plt_y + self._height > screen_height):
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return False
else:
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self.move(move_x, move_y)
self.show()
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return True
def _calc_position(self, alignment):
# Invoker: x, y, width and height
inv_rect = self._invoker.get_rect()
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palette_rectangle = self.get_allocation()
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if alignment == ALIGNMENT_BOTTOM_LEFT:
move_x = inv_rect.x
move_y = inv_rect.y + inv_rect.height
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elif alignment == ALIGNMENT_BOTTOM_RIGHT:
move_x = (inv_rect.x + inv_rect.width) - self._width
move_y = inv_rect.y + inv_rect.height
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elif alignment == ALIGNMENT_LEFT_BOTTOM:
move_x = inv_rect.x - self._width
move_y = inv_rect.y
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elif alignment == ALIGNMENT_LEFT_TOP:
move_x = inv_rect.x - self._width
move_y = (inv_rect.y + inv_rect.height) - palette_rectangle.height
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elif alignment == ALIGNMENT_RIGHT_BOTTOM:
move_x = inv_rect.x + inv_rect.width
move_y = inv_rect.y
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elif alignment == ALIGNMENT_RIGHT_TOP:
move_x = inv_rect.x + inv_rect.width
move_y = (inv_rect.y + inv_rect.height) - palette_rectangle.height
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elif alignment == ALIGNMENT_TOP_LEFT:
move_x = inv_rect.x
move_y = inv_rect.y - palette_rectangle.height
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elif alignment == ALIGNMENT_TOP_RIGHT:
move_x = (inv_rect.x + inv_rect.width) - self._width
move_y = inv_rect.y - palette_rectangle.height
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return move_x, move_y
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def set_primary_state(self, label, accel_path=None):
if accel_path != None:
item = gtk.MenuItem(label)
item.set_accel_path(accel_path)
self.append_menu_item(item)
self._separator.hide()
else:
self._palette_label.set_text(label)
def append_menu_item(self, item):
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self._separator.show()
self._menu_bar.show()
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self._menu_bar.append(item)
item.show()
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def set_content(self, widget):
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self._separator.show()
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self._content.pack_start(widget, True, True, self._PADDING)
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widget.show()
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def append_button(self, button):
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button.connect('released', self._close_palette_cb)
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self._button_bar.pack_start(button, True, True, self._PADDING)
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button.show()
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# Display the palette and set the position on the screen
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def popup(self):
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self.realize()
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self.place()
def popdown(self):
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gdk.keyboard_ungrab()
self.hide()
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# PRIVATE METHODS
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# Is the mouse out of the widget ?
def _is_mouse_out(self, widget):
mouse_x, mouse_y = widget.get_pointer()
event_rect = gdk.Rectangle(mouse_x, mouse_y, 1, 1)
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if (self.allocation.intersect(event_rect).width==0):
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return True
else:
return False
# SIGNAL HANDLERS
# Release the GDK pointer and hide the palette
def _close_palette_cb(self, widget=None, event=None):
self.popdown()
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# Mouse is out of the widget
def _mouse_out_widget_cb(self, widget, event):
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if (widget == self) and self._is_mouse_out(widget):
self._close_palette_cb()
return
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gdk.keyboard_grab(self.window, False)
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# Mouse inside the widget
def _mouse_over_widget_cb(self, widget, event):
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gdk.keyboard_ungrab()
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# Some key is pressed
def _on_key_press_event_cb(self, window, event):
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# Escape or Alt+Up: Close
# Enter, Return or Space: Select
keyval = event.keyval
state = event.state & gtk.accelerator_get_default_mod_mask()
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if (keyval == keysyms.Escape or
((keyval == keysyms.Up or keyval == keysyms.KP_Up) and
state == gdk.MOD1_MASK)):
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self._close_palette_cb()
class WidgetInvoker:
def __init__(self, parent):
self._parent = parent
def get_rect(self):
win_x, win_y = self._parent.window.get_origin()
rectangle = self._parent.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)
# Is mouse over self._parent ?
def is_mouse_over(self):
pointer_x, pointer_y = self._parent.get_pointer()
self._parent_alloc = self._parent.get_allocation()
pointer_rect = gdk.Rectangle(pointer_x + self._parent_alloc.x, \
pointer_y + self._parent_alloc.y, 1, 1)
if (self._parent.allocation.intersect(pointer_rect).width == 0):
return False
return True
class CanvasInvoker:
def __init__(self, parent):
self._parent = parent
def get_rect(self):
context = self._parent.get_context()
x, y = context.translate_to_screen(self._parent)
width, height = self._parent.get_allocation()
return gtk.gdk.Rectangle(x, y, width, height)
# Is mouse over self._parent ?
def is_mouse_over(self):
return True