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path: root/sugar-toolkit/src/sugar/graphics/colorbutton.py
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diff --git a/sugar-toolkit/src/sugar/graphics/colorbutton.py b/sugar-toolkit/src/sugar/graphics/colorbutton.py
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-# Copyright (C) 2007, Red Hat, Inc.
-# Copyright (C) 2008, Benjamin Berg <benjamin@sipsolutions.net>
-#
-# 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.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Lesser General Public License for more details.
-#
-# 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.
-
-import gettext
-import gtk
-import gobject
-import struct
-import logging
-
-from sugar.graphics import style
-from sugar.graphics.icon import Icon
-from sugar.graphics.palette import Palette, ToolInvoker, WidgetInvoker
-
-_ = lambda msg: gettext.dgettext('sugar-toolkit', msg)
-
-def get_svg_color_string(color):
- return '#%.2X%.2X%.2X' % (color.red / 257, color.green / 257,
- color.blue / 257)
-
-class _ColorButton(gtk.Button):
- """This is a ColorButton for Sugar. It is similar to the gtk.ColorButton,
- but does not have any alpha support.
- Instead of a color selector dialog it will pop up a Sugar palette.
-
- As a preview an sugar.graphics.Icon is used. The fill color will be set to
- the current color, and the stroke color is set to the font color.
- """
-
- __gtype_name__ = 'SugarColorButton'
- __gsignals__ = { 'color-set' : (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
- tuple())}
-
- def __init__(self, **kwargs):
- self._title = _('Choose a color')
- self._color = gtk.gdk.Color(0, 0, 0)
- self._has_palette = True
- self._has_invoker = True
- self._palette = None
- self._accept_drag = True
-
- self._preview = Icon(icon_name='color-preview',
- icon_size=gtk.ICON_SIZE_BUTTON)
-
- gobject.GObject.__init__(self, **kwargs)
-
- if self._accept_drag:
- self.drag_dest_set(gtk.DEST_DEFAULT_MOTION |
- gtk.DEST_DEFAULT_HIGHLIGHT |
- gtk.DEST_DEFAULT_DROP,
- [('application/x-color', 0, 0)],
- gtk.gdk.ACTION_COPY)
- self.drag_source_set(gtk.gdk.BUTTON1_MASK | gtk.gdk.BUTTON3_MASK,
- [('application/x-color', 0, 0)],
- gtk.gdk.ACTION_COPY)
- self.connect('drag_data_received', self.__drag_data_received_cb)
- self.connect('drag_data_get', self.__drag_data_get_cb)
-
- self._preview.fill_color = get_svg_color_string(self._color)
- self._preview.stroke_color = \
- get_svg_color_string(self.style.fg[gtk.STATE_NORMAL])
- self.set_image(self._preview)
-
- if self._has_palette and self._has_invoker:
- self._invoker = WidgetInvoker(self)
- # FIXME: This is a hack.
- self._invoker.has_rectangle_gap = lambda : False
- self._invoker.palette = self._palette
-
- def create_palette(self):
- if self._has_palette:
- self._palette = _ColorPalette(color=self._color,
- primary_text=self._title)
- self._palette.connect('color-set', self.__palette_color_set_cb)
- self._palette.connect('notify::color', self.__palette_color_changed)
-
- return self._palette
-
- def __palette_color_set_cb(self, palette):
- self.emit('color-set')
-
- def __palette_color_changed(self, palette, pspec):
- self.color = self._palette.color
-
- def do_style_set(self, previous_style):
- self._preview.stroke_color = \
- get_svg_color_string(self.style.fg[gtk.STATE_NORMAL])
-
- def do_clicked(self):
- if self._palette:
- self._palette.popup(immediate=True)
-
- def set_color(self, color):
- assert isinstance(color, gtk.gdk.Color)
-
- if self._color.red == color.red and \
- self._color.green == color.green and \
- self._color.blue == color.blue:
- return
-
- self._color = gtk.gdk.Color(color.red, color.green, color.blue)
- self._preview.fill_color = get_svg_color_string(self._color)
- if self._palette:
- self._palette.props.color = self._color
- self.notify('color')
-
- def get_color(self):
- return self._color
-
- color = gobject.property(type=object, getter=get_color, setter=set_color)
-
- def set_icon_name(self, icon_name):
- self._preview.props.icon_name = icon_name
-
- def get_icon_name(self):
- return self._preview.props.icon_name
-
- icon_name = gobject.property(type=str,
- getter=get_icon_name, setter=set_icon_name)
-
- def set_icon_size(self, icon_size):
- self._preview.props.icon_size = icon_size
-
- def get_icon_size(self):
- return self._preview.props.icon_size
-
- icon_size = gobject.property(type=int,
- getter=get_icon_size, setter=set_icon_size)
-
- def set_title(self, title):
- self._title = title
- if self._palette:
- self._palette.primary_text = self._title
-
- def get_title(self):
- return self._title
-
- title = gobject.property(type=str, getter=get_title, setter=set_title)
-
- def _set_has_invoker(self, has_invoker):
- self._has_invoker = has_invoker
-
- def _get_has_invoker(self):
- return self._has_invoker
-
- has_invoker = gobject.property(type=bool, default=True,
- flags=gobject.PARAM_READWRITE |
- gobject.PARAM_CONSTRUCT_ONLY,
- getter=_get_has_invoker,
- setter=_set_has_invoker)
-
- def _set_has_palette(self, has_palette):
- self._has_palette = has_palette
-
- def _get_has_palette(self):
- return self._has_palette
-
- has_palette = gobject.property(type=bool, default=True,
- flags=gobject.PARAM_READWRITE |
- gobject.PARAM_CONSTRUCT_ONLY,
- getter=_get_has_palette,
- setter=_set_has_palette)
-
- def _set_accept_drag(self, accept_drag):
- self._accept_drag = accept_drag
-
- def _get_accept_drag(self):
- return self._accept_drag
-
- accept_drag = gobject.property(type=bool, default=True,
- flags=gobject.PARAM_READWRITE |
- gobject.PARAM_CONSTRUCT_ONLY,
- getter=_get_accept_drag,
- setter=_set_accept_drag)
-
- # Drag and Drop
- def __drag_begin_cb(self, widget, context):
- pixbuf = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, True, 8,
- style.SMALL_ICON_SIZE,
- style.SMALL_ICON_SIZE)
-
- red = self._color.red / 257
- green = self._color.green / 257
- blue = self._color.blue / 257
-
- pixbuf.fill(red << 24 + green << 16 + blue << 8 + 0xff)
-
- context.set_icon_pixbuf(pixbuf)
-
- def __drag_data_get_cb(self, widget, context, selection_data, info, time):
- data = struct.pack('=HHHH', self._color.red, self._color.green,
- self._color.blue, 65535)
- selection_data.set(selection_data.target, 16, data)
-
- def __drag_data_received_cb(self, widget, context, x, y, selection_data, \
- info, time):
- if len(selection_data.data) != 8:
- return
-
- dropped = selection_data.data
- red = struct.unpack_from('=H', dropped, 0)[0]
- green = struct.unpack_from('=H', dropped, 2)[0]
- blue = struct.unpack_from('=H', dropped, 4)[0]
- # dropped[6] and dropped[7] is alpha, but we ignore the alpha channel
-
- color = gtk.gdk.Color(red, green, blue)
- self.set_color(color)
-
-
-class _ColorPalette(Palette):
- """This is a color picker palette. It will usually be used indirectly
- trough a sugar.graphics.ColorButton.
- """
- _RED = 0
- _GREEN = 1
- _BLUE = 2
-
- __gtype_name__ = 'SugarColorPalette'
- # The color-set signal is emitted when the user is finished selecting
- # a color.
- __gsignals__ = { 'color-set' : (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
- tuple())}
-
- def __init__(self, **kwargs):
- self._color = gtk.gdk.Color(0, 0, 0)
- self._previous_color = self._color.copy()
- self._scales = None
-
- Palette.__init__(self, **kwargs)
-
- self.connect('popup', self.__popup_cb)
- self.connect('popdown', self.__popdown_cb)
-
- self._picker_hbox = gtk.HBox()
- self.set_content(self._picker_hbox)
-
- self._swatch_tray = gtk.Table()
-
- self._picker_hbox.pack_start(self._swatch_tray)
- self._picker_hbox.pack_start(gtk.VSeparator(),
- padding=style.DEFAULT_SPACING)
-
- self._chooser_table = gtk.Table(3, 2)
- self._chooser_table.set_col_spacing(0, style.DEFAULT_PADDING)
-
- self._scales = []
- self._scales.append(
- self._create_color_scale(_('Red'), self._RED, 0))
- self._scales.append(
- self._create_color_scale(_('Green'), self._GREEN, 1))
- self._scales.append(
- self._create_color_scale(_('Blue'), self._BLUE, 2))
-
- self._picker_hbox.add(self._chooser_table)
-
- self._picker_hbox.show_all()
-
- self._build_swatches()
-
- def _create_color_scale(self, text, color, row):
- label = gtk.Label(text)
- label.props.xalign = 1.0
- scale = gtk.HScale()
- scale.set_size_request(style.zoom(250), -1)
- scale.set_draw_value(False)
- scale.set_range(0, 1.0)
- scale.set_increments(0.1, 0.2)
-
- if color == self._RED:
- scale.set_value(self._color.red / 65535.0)
- elif color == self._GREEN:
- scale.set_value(self._color.green / 65535.0)
- elif color == self._BLUE:
- scale.set_value(self._color.blue / 65535.0)
-
- scale.connect('value-changed',
- self.__scale_value_changed_cb,
- color)
- self._chooser_table.attach(label, 0, 1, row, row + 1)
- self._chooser_table.attach(scale, 1, 2, row, row + 1)
-
- return scale
-
-
-
- def _build_swatches(self):
- for child in self._swatch_tray.get_children():
- child.destroy()
-
- # Use a hardcoded list of colors for now.
- colors = ['#ed2529', '#69bc47', '#3c54a3',
- '#f57f25', '#0b6b3a', '#00a0c6',
- '#f6eb1a', '#b93f94', '#5b4a9c',
- '#000000', '#919496', '#ffffff']
-
- # We want 3 rows of colors.
- rows = 3
- i = 0
- self._swatch_tray.props.n_rows = rows
- self._swatch_tray.props.n_columns = (len(colors) + rows - 1) / rows
- for color in colors:
- button = _ColorButton(has_palette=False,
- color=gtk.gdk.color_parse(color),
- accept_drag=False,
- icon_size=gtk.ICON_SIZE_LARGE_TOOLBAR)
- button.set_relief(gtk.RELIEF_NONE)
- self._swatch_tray.attach(button,
- i % rows, i % rows + 1,
- i / rows, i / rows + 1,
- yoptions=0, xoptions=0)
- button.connect('clicked', self.__swatch_button_clicked_cb)
- i += 1
-
- self._swatch_tray.show_all()
-
- def __popup_cb(self, palette):
- self._previous_color = self._color.copy()
-
- def __popdown_cb(self, palette):
- self.emit('color-set')
-
- def __scale_value_changed_cb(self, widget, color):
- new_color = self._color.copy()
- if color == self._RED:
- new_color.red = int(65535 * widget.get_value())
- elif color == self._GREEN:
- new_color.green = int(65535 * widget.get_value())
- elif color == self._BLUE:
- new_color.blue = int(65535 * widget.get_value())
- self.color = new_color
-
- def do_key_press_event(self, event):
- if event.keyval == gtk.keysyms.Escape:
- self.props.color = self._previous_color
- self.popdown(immediate=True)
- return True
- elif event.keyval == gtk.keysyms.Return:
- self.popdown(immediate=True)
- return True
- return False
-
- def __swatch_button_clicked_cb(self, button):
- self.props.color = button.get_color()
-
- def set_color(self, color):
- assert isinstance(color, gtk.gdk.Color)
-
- if self._color.red == color.red and \
- self._color.green == color.green and \
- self._color.blue == color.blue:
- return
-
- self._color = color.copy()
-
- if self._scales:
- self._scales[self._RED].set_value(self._color.red / 65535.0)
- self._scales[self._GREEN].set_value(self._color.green / 65535.0)
- self._scales[self._BLUE].set_value(self._color.blue / 65535.0)
-
- self.notify('color')
-
- def get_color(self):
- return self._color
-
- color = gobject.property(type=object, getter=get_color, setter=set_color)
-
-
-
-def _add_accelerator(tool_button):
- if not tool_button.props.accelerator or not tool_button.get_toplevel() or \
- not tool_button.child:
- return
-
- # TODO: should we remove the accelerator from the prev top level?
-
- accel_group = tool_button.get_toplevel().get_data('sugar-accel-group')
- if not accel_group:
- logging.warning('No gtk.AccelGroup in the top level window.')
- return
-
- keyval, mask = gtk.accelerator_parse(tool_button.props.accelerator)
- # the accelerator needs to be set at the child, so the gtk.AccelLabel
- # in the palette can pick it up.
- tool_button.child.add_accelerator('clicked', accel_group, keyval, mask,
- gtk.ACCEL_LOCKED | gtk.ACCEL_VISIBLE)
-
-def _hierarchy_changed_cb(tool_button, previous_toplevel):
- _add_accelerator(tool_button)
-
-def setup_accelerator(tool_button):
- _add_accelerator(tool_button)
- tool_button.connect('hierarchy-changed', _hierarchy_changed_cb)
-
-# This not ideal. It would be better to subclass gtk.ToolButton, however
-# the python bindings do not seem to be powerfull enough for that.
-# (As we need to change a variable in the class structure.)
-class ColorToolButton(gtk.ToolItem):
- __gtype_name__ = 'SugarColorToolButton'
- __gsignals__ = { 'color-set' : (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
- tuple())}
-
- def __init__(self, icon_name='color-preview', **kwargs):
- self._accelerator = None
- self._tooltip = None
- self._palette_invoker = ToolInvoker()
- self._palette = None
-
- gobject.GObject.__init__(self, **kwargs)
-
- # The gtk.ToolButton has already added a normal button.
- # Replace it with a ColorButton
- color_button = _ColorButton(icon_name=icon_name, has_invoker=False)
- self.add(color_button)
-
- # The following is so that the behaviour on the toolbar is correct.
- color_button.set_relief(gtk.RELIEF_NONE)
- color_button.icon_size = gtk.ICON_SIZE_LARGE_TOOLBAR
-
- self._palette_invoker.attach_tool(self)
-
- # This widget just proxies the following properties to the colorbutton
- color_button.connect('notify::color', self.__notify_change)
- color_button.connect('notify::icon-name', self.__notify_change)
- color_button.connect('notify::icon-size', self.__notify_change)
- color_button.connect('notify::title', self.__notify_change)
- color_button.connect('color-set', self.__color_set_cb)
- color_button.connect('can-activate-accel',
- self.__button_can_activate_accel_cb)
-
- def __button_can_activate_accel_cb(self, button, signal_id):
- # Accept activation via accelerators regardless of this widget's state
- return True
-
- def set_accelerator(self, accelerator):
- self._accelerator = accelerator
- setup_accelerator(self)
-
- def get_accelerator(self):
- return self._accelerator
-
- accelerator = gobject.property(type=str, setter=set_accelerator,
- getter=get_accelerator)
-
- def create_palette(self):
- self._palette = self.get_child().create_palette()
- return self._palette
-
- def get_palette_invoker(self):
- return self._palette_invoker
-
- def set_palette_invoker(self, palette_invoker):
- self._palette_invoker.detach()
- self._palette_invoker = palette_invoker
-
- palette_invoker = gobject.property(
- type=object, setter=set_palette_invoker, getter=get_palette_invoker)
-
- def set_color(self, color):
- self.get_child().props.color = color
-
- def get_color(self):
- return self.get_child().props.color
-
- color = gobject.property(type=object, getter=get_color, setter=set_color)
-
- def set_icon_name(self, icon_name):
- self.get_child().props.icon_name = icon_name
-
- def get_icon_name(self):
- return self.get_child().props.icon_name
-
- icon_name = gobject.property(type=str,
- getter=get_icon_name, setter=set_icon_name)
-
- def set_icon_size(self, icon_size):
- self.get_child().props.icon_size = icon_size
-
- def get_icon_size(self):
- return self.get_child().props.icon_size
-
- icon_size = gobject.property(type=int,
- getter=get_icon_size, setter=set_icon_size)
-
- def set_title(self, title):
- self.get_child().props.title = title
-
- def get_title(self):
- return self.get_child().props.title
-
- title = gobject.property(type=str, getter=get_title, setter=set_title)
-
- def do_expose_event(self, event):
- child = self.get_child()
- allocation = self.get_allocation()
- if self._palette and self._palette.is_up():
- invoker = self._palette.props.invoker
- invoker.draw_rectangle(event, self._palette)
- elif child.state == gtk.STATE_PRELIGHT:
- child.style.paint_box(event.window, gtk.STATE_PRELIGHT,
- gtk.SHADOW_NONE, event.area,
- child, 'toolbutton-prelight',
- allocation.x, allocation.y,
- allocation.width, allocation.height)
-
- gtk.ToolButton.do_expose_event(self, event)
-
- def __notify_change(self, widget, pspec):
- self.notify(pspec.name)
-
- def __color_set_cb(self, widget):
- self.emit('color-set')
-