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An experimental interactive fan chart. Needs some work to be really usable. See bug #2611 for more details.

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svn: r11648
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Doug Blank 2009-01-17 22:36:30 +00:00
parent 4db08cb975
commit bd90c18ed9
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src/plugins/gramplet/FanChartGramplet.py Normal file
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# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2009 Douglas S. Blank
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# $Id$
#-------------------------------------------------------------------------
#
# Python modules
#
#-------------------------------------------------------------------------
import pygtk
pygtk.require('2.0')
import pango
import gtk
import math
from gtk import gdk
try:
import cairo
except ImportError:
pass
if gtk.pygtk_version < (2,3,93):
raise Exception("PyGtk 2.3.93 or later required")
#-------------------------------------------------------------------------
#
# GRAMPS modules
#
#-------------------------------------------------------------------------
from BasicUtils import name_displayer
from Simple import SimpleAccess
from gettext import gettext as _
from DataViews import Gramplet, register
#-------------------------------------------------------------------------
#
# FanChartWidget
#
#-------------------------------------------------------------------------
class FanChartWidget(gtk.Widget):
BORDER_WIDTH = 10
__gsignals__ = { 'realize': 'override',
'expose-event' : 'override',
'size-allocate': 'override',
'size-request': 'override',
}
def __init__(self, generations):
"""
Highly experimental... documents forthcoming...
"""
gtk.Widget.__init__(self)
self.draw_gc = None
self.pixels_per_generation = 50
## gotten from experiments with "sans serif 8":
self.degrees_per_radius = .80
self.generations = generations
self.rotate_value = 0
self.data = {}
for i in range(self.generations):
self.data[i] = [None for j in range(2 ** i)]
self.center = 50
self.layout = self.create_pango_layout('cairo')
self.layout.set_font_description(pango.FontDescription("sans serif 8"))
def set_generations(self, generations):
self.generations = generations
self.data = {}
for i in range(self.generations):
self.data[i] = [None for j in range(2 ** i)]
def do_realize(self):
self.set_flags(self.flags() | gtk.REALIZED)
self.window = gdk.Window(self.get_parent_window(),
width=self.allocation.width,
height=self.allocation.height,
window_type=gdk.WINDOW_CHILD,
wclass=gdk.INPUT_OUTPUT,
event_mask=self.get_events() | gdk.EXPOSURE_MASK)
if not hasattr(self.window, "cairo_create"):
self.draw_gc = gdk.GC(self.window,
line_width=5,
line_style=gdk.SOLID,
join_style=gdk.JOIN_ROUND)
self.window.set_user_data(self)
self.style.attach(self.window)
self.style.set_background(self.window, gtk.STATE_NORMAL)
self.window.move_resize(*self.allocation)
def do_size_request(self, requisition):
width, height = self.layout.get_size()
requisition.width = (width // pango.SCALE + self.BORDER_WIDTH*4)* 1.45
requisition.height = (3 * height // pango.SCALE + self.BORDER_WIDTH*4) * 1.2
def do_size_allocate(self, allocation):
self.allocation = allocation
if self.flags() & gtk.REALIZED:
self.window.move_resize(*allocation)
def _expose_gdk(self, event):
x, y, w, h = self.allocation
self.layout = self.create_pango_layout('no cairo')
fontw, fonth = self.layout.get_pixel_size()
self.style.paint_layout(self.window, self.state, False,
event.area, self, "label",
(w - fontw) / 2, (h - fonth) / 2,
self.layout)
def do_expose_event(self, event):
try:
cr = self.window.cairo_create()
except AttributeError:
return self._expose_gdk(event)
return self._expose_cairo(event, cr)
def _expose_cairo(self, event, cr):
x, y, w, h = self.allocation
cr.translate(w/2., h/2.)
cr.rotate(self.rotate_value * math.pi/180)
for generation in range(self.generations - 1, 0, -1):
slice = 360 / len(self.data[generation])
current = 0
for person in self.data[generation]:
if person:
name = name_displayer.display(person)
gender = person.get_gender()
self.draw_person(cr, gender, name, current, generation)
current += slice
cr.set_source_rgb(1, 1, 1) # white
cr.move_to(0,0)
cr.arc(0, 0, self.center, 0, 2 * math.pi)
cr.move_to(0,0)
cr.fill()
cr.set_source_rgb(0, 0, 0) # black
cr.arc(0, 0, self.center, 0, 2 * math.pi)
cr.stroke()
person = self.data[0][0]
if person:
cr.save()
name = name_displayer.display(person)
layout = self.create_pango_layout(name)
layout.set_font_description(pango.FontDescription("sans serif 8"))
cr.move_to(-self.center + 10, -4)
cr.show_layout(layout)
cr.restore()
fontw, fonth = self.layout.get_pixel_size()
cr.move_to((w - fontw - 4), (h - fonth ))
cr.update_layout(self.layout)
cr.show_layout(self.layout)
def draw_person(self, cr, gender, name, start, generation):
x, y, w, h = self.allocation
start_rad = start * math.pi/180
if gender == 0:
cr.set_source_rgb(1, 0.69, 0.69) # pink
elif gender == 1:
cr.set_source_rgb(0, 1, 1) # cyan
radius = generation * self.pixels_per_generation + self.center
cr.move_to(0, 0)
cr.arc(0, 0, radius, start_rad, start_rad + (2 * math.pi) / 2 ** generation)
cr.move_to(0, 0)
cr.fill()
cr.set_source_rgb(0, 0, 0) # black
cr.arc(0, 0, radius, start_rad, start_rad)
cr.line_to(0, 0)
cr.arc(0, 0, radius, start_rad, start_rad + (2 * math.pi) / 2 ** generation)
cr.line_to(0, 0)
cr.set_line_width(1)
cr.stroke()
degrees = 6 # self.text_degrees(name, radius)/2
#FIXME: if degrees bigger than arc available, trim or wrap?
self.draw_text(cr, name,
radius - self.pixels_per_generation/2,
start + 90 + degrees)
def text_degrees(self, text, radius):
return 360.0 * len(text)/(radius * self.degrees_per_radius)
def draw_text(self, cr, text, radius, pos):
x, y, w, h = self.allocation
cr.save()
# Create a PangoLayout, set the font and text
# Draw the layout N_WORDS times in a circle
for i in range(len(text)):
cr.save()
layout = self.create_pango_layout(text[i])
layout.set_font_description(pango.FontDescription("sans serif 8"))
angle = 360.0 * i / (radius * self.degrees_per_radius) + pos
cr.set_source_rgb(0, 0, 1) # blue clickable
cr.rotate(angle * (math.pi / 180));
# Inform Pango to re-layout the text with the new transformation
cr.update_layout(layout)
width, height = layout.get_size()
cr.move_to(- (width / pango.SCALE) / 2.0, - radius)
cr.show_layout(layout)
cr.restore()
cr.restore()
class FanChartGramplet(Gramplet):
def init(self):
self.gui.fan = FanChartWidget(4)
self.gui.get_container_widget().remove(self.gui.textview)
vbox = gtk.VBox()
self.scale = gtk.HScale()
self.scale.set_draw_value(0)
self.scale.set_value_pos(gtk.POS_LEFT)
self.scale.set_range(0, 360)
self.scale.connect("value-changed", self.scale_changed)
vbox.pack_start(self.scale, False, False)
vbox.pack_start(self.gui.fan)
self.gui.get_container_widget().add_with_viewport(vbox)
#container is a gtk.ScrolledWindow
container = self.gui.get_container_widget()
container.connect("button-press-event", self.on_mouse_down)
vbox.show()
self.gui.fan.show()
self.scale.show()
def scale_changed(self, widget):
self.gui.fan.rotate_value = widget.get_value()
self.gui.fan.queue_draw()
def on_mouse_down(self, widget, e):
# compute angle, radius, find out who would be there (rotated)
x, y, w, h = self.gui.fan.allocation
cx = w/2
cy = h/2
radius = math.sqrt((e.x - cx) ** 2 + (e.y - cy - 20) ** 2)
if radius < self.gui.fan.center:
generation = 0
else:
generation = int((radius - self.gui.fan.center) /
self.gui.fan.pixels_per_generation) + 1
rads = math.atan2( (e.y - cy), (e.x - cx - 20) )
if rads < 0:
rads = math.pi + (math.pi + rads)
pos = (rads/(math.pi * 2) - self.gui.fan.rotate_value/360.)
pos = int(math.floor(pos * 2 ** generation))
pos = pos % (2 ** generation)
if 0 < generation < 4 and 0 <= pos < len(self.gui.fan.data[generation]):
person = self.gui.fan.data[generation][pos]
if person:
#name = name_displayer.display(person)
self.dbstate.change_active_person(person)
return True
def db_changed(self):
self.sa = SimpleAccess(self.dbstate.db)
def active_changed(self, handle):
self.gui.fan.rotate_value = 0
self.scale.set_value(0)
self.scale.set_value_pos(gtk.POS_LEFT)
self.update()
def main(self):
self.gui.fan.data[0][0] = self.dbstate.get_active_person()
for current in range(1, 4):
parent = 0
for p in self.gui.fan.data[current - 1]:
self.gui.fan.data[current][parent] = self.sa.father(p)
parent += 1
self.gui.fan.data[current][parent] = self.sa.mother(p)
parent += 1
self.gui.fan.queue_draw()
register(type="gramplet",
name= "Fan Chart Gramplet",
tname=_("Fan Chart Gramplet"),
height=430,
expand=False,
content = FanChartGramplet,
detached_height = 550,
detached_width = 475,
title=_("Fan Chart"),
)