An experimental interactive fan chart. Needs some work to be really usable. See bug #2611 for more details.
svn: r11648
This commit is contained in:
Doug Blank
parent
4db08cb975
commit
bd90c18ed9
292
src/plugins/gramplet/FanChartGramplet.py
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292
src/plugins/gramplet/FanChartGramplet.py
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2009 Douglas S. Blank
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program 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
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# $Id$
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#-------------------------------------------------------------------------
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#
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# Python modules
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#
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#-------------------------------------------------------------------------
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import pygtk
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pygtk.require('2.0')
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import pango
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import gtk
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import math
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from gtk import gdk
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try:
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import cairo
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except ImportError:
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pass
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if gtk.pygtk_version < (2,3,93):
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raise Exception("PyGtk 2.3.93 or later required")
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#-------------------------------------------------------------------------
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#
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# GRAMPS modules
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#
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#-------------------------------------------------------------------------
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from BasicUtils import name_displayer
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from Simple import SimpleAccess
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from gettext import gettext as _
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from DataViews import Gramplet, register
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#-------------------------------------------------------------------------
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#
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# FanChartWidget
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#
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#-------------------------------------------------------------------------
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class FanChartWidget(gtk.Widget):
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BORDER_WIDTH = 10
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__gsignals__ = { 'realize': 'override',
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'expose-event' : 'override',
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'size-allocate': 'override',
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'size-request': 'override',
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}
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def __init__(self, generations):
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"""
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Highly experimental... documents forthcoming...
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"""
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gtk.Widget.__init__(self)
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self.draw_gc = None
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self.pixels_per_generation = 50
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## gotten from experiments with "sans serif 8":
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self.degrees_per_radius = .80
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self.generations = generations
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self.rotate_value = 0
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self.data = {}
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for i in range(self.generations):
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self.data[i] = [None for j in range(2 ** i)]
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self.center = 50
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self.layout = self.create_pango_layout('cairo')
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self.layout.set_font_description(pango.FontDescription("sans serif 8"))
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def set_generations(self, generations):
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self.generations = generations
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self.data = {}
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for i in range(self.generations):
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self.data[i] = [None for j in range(2 ** i)]
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def do_realize(self):
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self.set_flags(self.flags() | gtk.REALIZED)
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self.window = gdk.Window(self.get_parent_window(),
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width=self.allocation.width,
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height=self.allocation.height,
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window_type=gdk.WINDOW_CHILD,
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wclass=gdk.INPUT_OUTPUT,
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event_mask=self.get_events() | gdk.EXPOSURE_MASK)
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if not hasattr(self.window, "cairo_create"):
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self.draw_gc = gdk.GC(self.window,
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line_width=5,
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line_style=gdk.SOLID,
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join_style=gdk.JOIN_ROUND)
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self.window.set_user_data(self)
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self.style.attach(self.window)
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self.style.set_background(self.window, gtk.STATE_NORMAL)
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self.window.move_resize(*self.allocation)
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def do_size_request(self, requisition):
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width, height = self.layout.get_size()
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requisition.width = (width // pango.SCALE + self.BORDER_WIDTH*4)* 1.45
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requisition.height = (3 * height // pango.SCALE + self.BORDER_WIDTH*4) * 1.2
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def do_size_allocate(self, allocation):
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self.allocation = allocation
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if self.flags() & gtk.REALIZED:
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self.window.move_resize(*allocation)
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def _expose_gdk(self, event):
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x, y, w, h = self.allocation
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self.layout = self.create_pango_layout('no cairo')
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fontw, fonth = self.layout.get_pixel_size()
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self.style.paint_layout(self.window, self.state, False,
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event.area, self, "label",
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(w - fontw) / 2, (h - fonth) / 2,
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self.layout)
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def do_expose_event(self, event):
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try:
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cr = self.window.cairo_create()
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except AttributeError:
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return self._expose_gdk(event)
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return self._expose_cairo(event, cr)
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def _expose_cairo(self, event, cr):
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x, y, w, h = self.allocation
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cr.translate(w/2., h/2.)
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cr.rotate(self.rotate_value * math.pi/180)
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for generation in range(self.generations - 1, 0, -1):
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slice = 360 / len(self.data[generation])
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current = 0
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for person in self.data[generation]:
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if person:
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name = name_displayer.display(person)
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gender = person.get_gender()
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self.draw_person(cr, gender, name, current, generation)
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current += slice
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cr.set_source_rgb(1, 1, 1) # white
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cr.move_to(0,0)
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cr.arc(0, 0, self.center, 0, 2 * math.pi)
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cr.move_to(0,0)
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cr.fill()
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cr.set_source_rgb(0, 0, 0) # black
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cr.arc(0, 0, self.center, 0, 2 * math.pi)
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cr.stroke()
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person = self.data[0][0]
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if person:
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cr.save()
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name = name_displayer.display(person)
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layout = self.create_pango_layout(name)
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layout.set_font_description(pango.FontDescription("sans serif 8"))
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cr.move_to(-self.center + 10, -4)
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cr.show_layout(layout)
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cr.restore()
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fontw, fonth = self.layout.get_pixel_size()
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cr.move_to((w - fontw - 4), (h - fonth ))
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cr.update_layout(self.layout)
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cr.show_layout(self.layout)
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def draw_person(self, cr, gender, name, start, generation):
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x, y, w, h = self.allocation
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start_rad = start * math.pi/180
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if gender == 0:
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cr.set_source_rgb(1, 0.69, 0.69) # pink
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elif gender == 1:
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cr.set_source_rgb(0, 1, 1) # cyan
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radius = generation * self.pixels_per_generation + self.center
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cr.move_to(0, 0)
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cr.arc(0, 0, radius, start_rad, start_rad + (2 * math.pi) / 2 ** generation)
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cr.move_to(0, 0)
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cr.fill()
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cr.set_source_rgb(0, 0, 0) # black
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cr.arc(0, 0, radius, start_rad, start_rad)
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cr.line_to(0, 0)
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cr.arc(0, 0, radius, start_rad, start_rad + (2 * math.pi) / 2 ** generation)
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cr.line_to(0, 0)
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cr.set_line_width(1)
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cr.stroke()
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degrees = 6 # self.text_degrees(name, radius)/2
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#FIXME: if degrees bigger than arc available, trim or wrap?
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self.draw_text(cr, name,
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radius - self.pixels_per_generation/2,
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start + 90 + degrees)
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def text_degrees(self, text, radius):
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return 360.0 * len(text)/(radius * self.degrees_per_radius)
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def draw_text(self, cr, text, radius, pos):
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x, y, w, h = self.allocation
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cr.save()
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# Create a PangoLayout, set the font and text
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# Draw the layout N_WORDS times in a circle
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for i in range(len(text)):
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cr.save()
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layout = self.create_pango_layout(text[i])
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layout.set_font_description(pango.FontDescription("sans serif 8"))
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angle = 360.0 * i / (radius * self.degrees_per_radius) + pos
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cr.set_source_rgb(0, 0, 1) # blue clickable
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cr.rotate(angle * (math.pi / 180));
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# Inform Pango to re-layout the text with the new transformation
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cr.update_layout(layout)
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width, height = layout.get_size()
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cr.move_to(- (width / pango.SCALE) / 2.0, - radius)
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cr.show_layout(layout)
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cr.restore()
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cr.restore()
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class FanChartGramplet(Gramplet):
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def init(self):
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self.gui.fan = FanChartWidget(4)
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self.gui.get_container_widget().remove(self.gui.textview)
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vbox = gtk.VBox()
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self.scale = gtk.HScale()
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self.scale.set_draw_value(0)
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self.scale.set_value_pos(gtk.POS_LEFT)
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self.scale.set_range(0, 360)
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self.scale.connect("value-changed", self.scale_changed)
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vbox.pack_start(self.scale, False, False)
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vbox.pack_start(self.gui.fan)
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self.gui.get_container_widget().add_with_viewport(vbox)
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#container is a gtk.ScrolledWindow
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container = self.gui.get_container_widget()
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container.connect("button-press-event", self.on_mouse_down)
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vbox.show()
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self.gui.fan.show()
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self.scale.show()
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def scale_changed(self, widget):
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self.gui.fan.rotate_value = widget.get_value()
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self.gui.fan.queue_draw()
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def on_mouse_down(self, widget, e):
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# compute angle, radius, find out who would be there (rotated)
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x, y, w, h = self.gui.fan.allocation
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cx = w/2
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cy = h/2
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radius = math.sqrt((e.x - cx) ** 2 + (e.y - cy - 20) ** 2)
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if radius < self.gui.fan.center:
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generation = 0
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else:
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generation = int((radius - self.gui.fan.center) /
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self.gui.fan.pixels_per_generation) + 1
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rads = math.atan2( (e.y - cy), (e.x - cx - 20) )
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if rads < 0:
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rads = math.pi + (math.pi + rads)
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pos = (rads/(math.pi * 2) - self.gui.fan.rotate_value/360.)
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pos = int(math.floor(pos * 2 ** generation))
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pos = pos % (2 ** generation)
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if 0 < generation < 4 and 0 <= pos < len(self.gui.fan.data[generation]):
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person = self.gui.fan.data[generation][pos]
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if person:
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#name = name_displayer.display(person)
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self.dbstate.change_active_person(person)
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return True
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def db_changed(self):
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self.sa = SimpleAccess(self.dbstate.db)
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def active_changed(self, handle):
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self.gui.fan.rotate_value = 0
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self.scale.set_value(0)
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self.scale.set_value_pos(gtk.POS_LEFT)
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self.update()
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def main(self):
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self.gui.fan.data[0][0] = self.dbstate.get_active_person()
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for current in range(1, 4):
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parent = 0
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for p in self.gui.fan.data[current - 1]:
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self.gui.fan.data[current][parent] = self.sa.father(p)
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parent += 1
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self.gui.fan.data[current][parent] = self.sa.mother(p)
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parent += 1
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self.gui.fan.queue_draw()
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register(type="gramplet",
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name= "Fan Chart Gramplet",
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tname=_("Fan Chart Gramplet"),
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height=430,
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expand=False,
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content = FanChartGramplet,
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detached_height = 550,
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detached_width = 475,
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title=_("Fan Chart"),
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)
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