sugar-calculate-activity 43-3 / usr / share / sugar / activities / Calculate.activity / layout.py

# layout.py, see calculate.py for info
# Copyright (C) 2012 Aneesh Dogra <lionaneesh@gmail.com>

from gettext import gettext as _
import pygtk
pygtk.require('2.0')
import gtk
import pango
from sugar.activity import activity
import sugar.profile
from sugar.graphics.combobox import ComboBox
from toolbars import EditToolbar
from toolbars import AlgebraToolbar
from toolbars import TrigonometryToolbar
from toolbars import BooleanToolbar
from toolbars import MiscToolbar

try:
    from sugar.graphics.toolbarbox import ToolbarButton, ToolbarBox
    from sugar.activity.widgets import ActivityToolbarButton
    from sugar.activity.widgets import StopButton
except ImportError:
    pass


class CalcLayout:

    FONT_SMALL_POINTS = 10
    FONT_SMALL = "sans %d" % FONT_SMALL_POINTS
    FONT_SMALL_NARROW = "sans italic %d" % FONT_SMALL_POINTS
    FONT_BIG_POINTS = 14
    FONT_BIG = "sans bold %d" % FONT_BIG_POINTS
    FONT_BIG_NARROW = "sans italic 14"
    FONT_BIGGER_POINTS = 18
    FONT_BIGGER = "sans bold %d" % FONT_BIGGER_POINTS

    def __init__(self, parent):
        self._parent = parent

        self._own_equations = []
        self._other_equations = []
        self._showing_history = True
        self._showing_all_history = True
        self._var_textviews = {}
        self.graph_selected = None

        self.create_dialog()

    def create_color(self, rf, gf, bf):
        return gtk.gdk.Color(int(rf * 0xFFFF), int(gf * 0xFFFF),
                             int(bf * 0xFFFF))

    def create_button_data(self):
        """Create a list with button information. We need to do that here
        because we want to include the lambda functions."""

        mul_sym = self._parent.ml.mul_sym
        div_sym = self._parent.ml.div_sym
        equ_sym = self._parent.ml.equ_sym

        self.button_data = [
            # [x, y, width, label, bgcol, cb]
            [0, 0, 2, 1, u'\u2190', self.col_gray3,
                lambda w: self._parent.move_left()],
            [2, 0, 2, 1, u'\u2192', self.col_gray3,
                lambda w: self._parent.move_right()],
            [4, 0, 2, 1, u'\u232B', self.col_gray3,
                lambda w: self._parent.remove_character(-1)],

            [0, 1, 1, 2, '7', self.col_gray2,
                lambda w: self._parent.add_text('7')],
            [1, 1, 1, 2, '8', self.col_gray2,
                lambda w: self._parent.add_text('8')],
            [2, 1, 1, 2, '9', self.col_gray2,
                lambda w: self._parent.add_text('9')],

            [0, 3, 1, 2, '4', self.col_gray2,
                lambda w: self._parent.add_text('4')],
            [1, 3, 1, 2, '5', self.col_gray2,
                lambda w: self._parent.add_text('5')],
            [2, 3, 1, 2, '6', self.col_gray2,
                lambda w: self._parent.add_text('6')],

            [0, 5, 1, 2, '1', self.col_gray2,
                lambda w: self._parent.add_text('1')],
            [1, 5, 1, 2, '2', self.col_gray2,
                lambda w: self._parent.add_text('2')],
            [2, 5, 1, 2, '3', self.col_gray2,
                lambda w: self._parent.add_text('3')],

            [0, 7, 2, 2, '0', self.col_gray2,
                lambda w: self._parent.add_text('0')],
            [2, 7, 1, 2, '.', self.col_gray2,
                lambda w: self._parent.add_text('.')],

            [3, 1, 3, 2, _('Clear'), self.col_gray1,
             lambda w: self._parent.clear()],

            [3, 3, 1, 2, '+', self.col_gray3,
                lambda w: self._parent.add_text('+')],
            [4, 3, 1, 2, '-', self.col_gray3,
                lambda w: self._parent.add_text('-')],
            [5, 3, 1, 2, '(', self.col_gray3,
             lambda w: self._parent.add_text('(')],
            [3, 5, 1, 2, mul_sym, self.col_gray3,
                lambda w: self._parent.add_text(mul_sym)],
            [4, 5, 1, 2, div_sym, self.col_gray3,
                lambda w: self._parent.add_text(div_sym)],
            [5, 5, 1, 2, ')', self.col_gray3,
                lambda w: self._parent.add_text(')')],

            [3, 7, 3, 2, equ_sym, self.col_gray1,
                lambda w: self._parent.process()],
        ]

    def create_dialog(self):
        """Setup most of the dialog."""

# Toolbar
        try:
            self._toolbar_box = ToolbarBox()

            activity_button = ActivityToolbarButton(self._parent)
            self._toolbar_box.toolbar.insert(activity_button, 0)

            def append(icon_name, label, page, position):
                toolbar_button = ToolbarButton()
                toolbar_button.props.page = page
                toolbar_button.props.icon_name = icon_name
                toolbar_button.props.label = label
                self._toolbar_box.toolbar.insert(toolbar_button, position)

            append('toolbar-edit',
                   _('Edit'),
                   EditToolbar(self._parent),
                   -1)

            append('toolbar-algebra',
                   _('Algebra'),
                   AlgebraToolbar(self._parent),
                   -1)

            append('toolbar-trigonometry',
                   _('Trigonometry'),
                   TrigonometryToolbar(self._parent),
                   -1)

            append('toolbar-boolean',
                   _('Boolean'),
                   BooleanToolbar(self._parent),
                   -1)

            self._misc_toolbar = MiscToolbar(
                self._parent,
                target_toolbar=self._toolbar_box.toolbar)

            append('toolbar-constants',
                   _('Miscellaneous'),
                   self._misc_toolbar,
                   5)

            self._stop_separator = gtk.SeparatorToolItem()
            self._stop_separator.props.draw = False
            self._stop_separator.set_expand(True)
            self._stop_separator.show()
            self._toolbar_box.toolbar.insert(self._stop_separator, -1)

            self._stop = StopButton(self._parent)
            self._toolbar_box.toolbar.insert(self._stop, -1)

            self._toolbar_box.show_all()
            self._parent.set_toolbar_box(self._toolbar_box)

        except NameError:
            # Use old toolbar design
            toolbox = activity.ActivityToolbox(self._parent)
            self._parent.set_toolbox(toolbox)
            toolbox.add_toolbar(_('Edit'), EditToolbar(self._parent))
            toolbox.add_toolbar(_('Algebra'), AlgebraToolbar(self._parent))
            toolbox.add_toolbar(
                _('Trigonometry'), TrigonometryToolbar(self._parent))
            toolbox.add_toolbar(_('Boolean'), BooleanToolbar(self._parent))
            toolbox.add_toolbar(_('Miscellaneous'), MiscToolbar(self._parent))
            toolbox.show_all()

# Some layout constants
        self.input_font = pango.FontDescription(str='sans bold 12')
        self.button_font = pango.FontDescription(str='sans bold 16')
        self.col_white = self.create_color(1.00, 1.00, 1.00)
        self.col_gray1 = self.create_color(0.76, 0.76, 0.76)
        self.col_gray2 = self.create_color(0.50, 0.50, 0.50)
        self.col_gray3 = self.create_color(0.25, 0.25, 0.25)
        self.col_black = self.create_color(0.00, 0.00, 0.00)
        self.col_red = self.create_color(1.00, 0.00, 0.00)

# Big - Table, 16 rows, 10 columns, homogeneously divided
        self.grid = gtk.Table(26, 11, True)
        self.grid.set_border_width(0)
        self.grid.set_row_spacings(0)
        self.grid.set_col_spacings(4)

# Left part: container and input
        vc1 = gtk.VBox(False, 0)
        hc1 = gtk.HBox(False, 10)
        eb = gtk.EventBox()
        eb.add(hc1)
        eb.modify_bg(gtk.STATE_NORMAL, self.col_black)
        eb.set_border_width(12)
        eb2 = gtk.EventBox()
        eb2.add(eb)
        eb2.modify_bg(gtk.STATE_NORMAL, self.col_black)
        label1 = gtk.Label(_('Label:'))
        label1.modify_fg(gtk.STATE_NORMAL, self.col_white)
        label1.set_alignment(1, 0.5)
        hc1.pack_start(label1, expand=False, fill=False, padding=10)
        self.label_entry = gtk.Entry()
        self.label_entry.modify_bg(gtk.STATE_INSENSITIVE, self.col_black)
        hc1.pack_start(self.label_entry, expand=True, fill=True, padding=0)
        vc1.pack_start(eb2, expand=False)

        self.text_entry = gtk.Entry()
        try:
            self.text_entry.props.im_module = 'gtk-im-context-simple'
        except AttributeError:
            pass
        self.text_entry.set_size_request(-1, 75)
        self.text_entry.connect('key_press_event', self._parent.ignore_key_cb)
        self.text_entry.modify_font(self.input_font)
        self.text_entry.modify_bg(gtk.STATE_INSENSITIVE, self.col_black)
        eb = gtk.EventBox()
        eb.add(self.text_entry)
        eb.modify_bg(gtk.STATE_NORMAL, self.col_black)
        eb.set_border_width(12)
        eb2 = gtk.EventBox()
        eb2.add(eb)
        eb2.modify_bg(gtk.STATE_NORMAL, self.col_black)
        vc1.pack_start(eb2, expand=True, fill=True, padding=0)
        self.grid.attach(vc1, 0, 7, 0, 6)

# Left part: buttons
        self.pad = gtk.Table(9, 6, True)
        self.pad.set_row_spacings(12)
        self.pad.set_col_spacings(12)
        self.pad.set_border_width(12)
        self.create_button_data()
        self.buttons = {}
        for x, y, w, h, cap, bgcol, cb in self.button_data:
            button = self.create_button(
                _(cap), cb, self.col_white, bgcol, w, h)
            self.buttons[cap] = button
            self.pad.attach(button, x, x + w, y, y + h)

        eb = gtk.EventBox()
        eb.add(self.pad)
        eb.modify_bg(gtk.STATE_NORMAL, self.col_black)
        self.grid.attach(eb, 0, 7, 6, 26)

# Right part: container and equation button
        hc2 = gtk.HBox()
        combo = ComboBox()
        combo.append_item(0, _('All equations'))
        combo.append_item(1, _('My equations'))
        combo.append_item(2, _('Show variables'))
        combo.set_active(0)
        combo.connect('changed', self._history_filter_cb)
        hc2.pack_start(combo)
        hc2.set_border_width(6)
        self.grid.attach(hc2, 7, 11, 0, 2)

# Right part: last equation
        self.last_eq = gtk.TextView()
        self.last_eq.set_editable(False)
        self.last_eq.set_wrap_mode(gtk.WRAP_WORD_CHAR)
        self.last_eq.connect('realize', self._textview_realize_cb)
        self.last_eq.modify_base(gtk.STATE_NORMAL, gtk.gdk.color_parse(
                                 sugar.profile.get_color().get_fill_color()))
        self.last_eq.modify_bg(gtk.STATE_NORMAL, gtk.gdk.color_parse(
                               sugar.profile.get_color().get_stroke_color()))
        self.last_eq.set_border_window_size(gtk.TEXT_WINDOW_LEFT, 4)
        self.last_eq.set_border_window_size(gtk.TEXT_WINDOW_RIGHT, 4)
        self.last_eq.set_border_window_size(gtk.TEXT_WINDOW_TOP, 4)
        self.last_eq.set_border_window_size(gtk.TEXT_WINDOW_BOTTOM, 4)

        # TODO Fix for old Sugar 0.82 builds, red_float not available
        xo_color = sugar.profile.get_color()
        bright = (
            gtk.gdk.color_parse(xo_color.get_fill_color()).red_float +
            gtk.gdk.color_parse(xo_color.get_fill_color()).green_float +
            gtk.gdk.color_parse(xo_color.get_fill_color()).blue_float) / 3.0
        if bright < 0.5:
            self.last_eq.modify_text(gtk.STATE_NORMAL, self.col_white)
        else:
            self.last_eq.modify_text(gtk.STATE_NORMAL, self.col_black)

        self.grid.attach(self.last_eq, 7, 11, 2, 7)

# Right part: history
        scrolled_window = gtk.ScrolledWindow()
        scrolled_window.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)

        self.history_vbox = gtk.VBox()
        self.history_vbox.set_homogeneous(False)
        self.history_vbox.set_border_width(0)
        self.history_vbox.set_spacing(4)

        self.variable_vbox = gtk.VBox()
        self.variable_vbox.set_homogeneous(False)
        self.variable_vbox.set_border_width(0)
        self.variable_vbox.set_spacing(4)

        vbox = gtk.VBox()
        vbox.pack_start(self.history_vbox)
        vbox.pack_start(self.variable_vbox)
        scrolled_window.add_with_viewport(vbox)
        self.grid.attach(scrolled_window, 7, 11, 7, 26)

        gtk.gdk.screen_get_default().connect('size-changed',
                                             self._configure_cb)

    def _configure_cb(self, event):
        # Maybe redo layout
        self._toolbar_box.toolbar.remove(self._stop)
        self._toolbar_box.toolbar.remove(self._stop_separator)
        self._misc_toolbar.update_layout()
        self._toolbar_box.toolbar.insert(self._stop_separator, -1)
        self._toolbar_box.toolbar.insert(self._stop, -1)

    def show_it(self):
        """Show the dialog."""
        self._parent.set_canvas(self.grid)
        self._parent.show_all()
        self.show_history()
        self.text_entry.grab_focus()

    def showing_history(self):
        """Return whether we're currently showing the history (or otherwise
        the list of variables)."""
        return self._showing_history

    def show_history(self):
        """Show the history VBox."""
        self._showing_history = True
        self.variable_vbox.hide()
        self.history_vbox.show()

    def toggle_select_graph(self, widget, host=None):
        # if we have a graph already selected, we must deselect it first
        if self.graph_selected and self.graph_selected != widget:
            self.toggle_select_graph(self.graph_selected)

        if not self.graph_selected:
            widget.set_visible_window(True)
            widget.set_above_child(True)
            self.graph_selected = widget
            white = gtk.gdk.color_parse('white')
            widget.modify_bg(gtk.STATE_NORMAL, white)
        else:
            widget.set_visible_window(False)
            self.graph_selected = False

    def add_equation(self, textview, own, prepend=False):
        """Add a gtk.TextView of an equation to the history_vbox."""

        GraphEventBox = None
        if isinstance(textview, gtk.Image):
            # Add the image inside the eventBox
            GraphEventBox = gtk.EventBox()
            GraphEventBox.add(textview)
            GraphEventBox.set_visible_window(False)
            GraphEventBox.connect(
                'button_press_event', self.toggle_select_graph)
            GraphEventBox.show()

        if prepend:
            if GraphEventBox:
                self.history_vbox.pack_start(GraphEventBox, False, True)
                self.history_vbox.reorder_child(GraphEventBox, 0)
            else:
                self.history_vbox.pack_start(textview, False, True)
                self.history_vbox.reorder_child(textview, 0)
        else:
            if GraphEventBox:
                self.history_vbox.pack_end(GraphEventBox, False, True)
            else:
                self.history_vbox.pack_end(textview, False, True)

        if own:
            if GraphEventBox:
                self._own_equations.append(GraphEventBox)
                GraphEventBox.child.show()
            else:
                self._own_equations.append(textview)
                textview.show()
        else:
            if self._showing_all_history:
                if GraphEventBox:
                    self._other_equations.append(GraphEventBox)
                    GraphEventBox.child.show()
                else:
                    self._other_equations.append(textview)
                    textview.show()

    def show_all_history(self):
        """Show both owned and other equations."""
        self._showing_all_history = True
        for key in self._other_equations:
            if isinstance(key, gtk.EventBox):
                key.child.show()
            else:
                key.show()

    def show_own_history(self):
        """Show only owned equations."""
        self._showing_all_history = False
        for key in self._other_equations:
            if isinstance(key, gtk.EventBox):
                key.child.hide()
            else:
                key.hide()

    def add_variable(self, varname, textview):
        """Add a gtk.TextView of a variable to the variable_vbox."""

        if varname in self._var_textviews:
            self.variable_vbox.remove(self._var_textviews[varname])
            del self._var_textviews[varname]

        self._var_textviews[varname] = textview
        self.variable_vbox.pack_start(textview, False, True)

        # Reorder textviews for a sorted list
        names = self._var_textviews.keys()
        names.sort()
        for i in range(len(names)):
            self.variable_vbox.reorder_child(self._var_textviews[names[i]], i)

        textview.show()

    def show_variables(self):
        """Show the variables VBox."""
        self._showing_history = False
        self.history_vbox.hide()
        self.variable_vbox.show()

    def create_button(self, cap, cb, fgcol, bgcol, width, height):
        """Create a button that is set up properly."""
        button = gtk.Button(_(cap))
        self.modify_button_appearance(button, fgcol, bgcol, width, height)
        button.connect("clicked", cb)
        button.connect("key_press_event", self._parent.ignore_key_cb)
        return button

    def modify_button_appearance(self, button, fgcol, bgcol, width, height):
        """Modify button style."""
        width = 50 * width
        height = 50 * height
        button.get_child().set_size_request(width, height)
        button.get_child().modify_font(self.button_font)
        button.get_child().modify_fg(gtk.STATE_NORMAL, fgcol)
        button.modify_bg(gtk.STATE_NORMAL, bgcol)
        button.modify_bg(gtk.STATE_PRELIGHT, bgcol)

    def _history_filter_cb(self, combo):
        selection = combo.get_active()
        if selection == 0:
            self.show_history()
            self.show_all_history()
        elif selection == 1:
            self.show_history()
            self.show_own_history()
        elif selection == 2:
            self.show_variables()

    def _textview_realize_cb(self, widget):
        '''Change textview properties once window is created.'''
        win = widget.get_window(gtk.TEXT_WINDOW_TEXT)
        win.set_cursor(gtk.gdk.Cursor(gtk.gdk.HAND1))
        return False