def __init__(self, graph=None):
'''
'''
self.graph = graph
self.force_directed_graph = ForceDirectedGraph(graph=self.graph, graphical_event_manager=self)
self.last_generation_timestamp = None
self.display_node_labels = False
self.b1_down = False
self.b2_down = False
self.b3_down = False
self.b1_x = None
self.b1_y = None
self.mx = None
self.my = None
self.started = False
self.i = 0
self.win = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.win.set_title(WIN_TITLE)
self.gw = W_1
self.gh = H_1 #int(float(self.gw) / 1.618)
self.win.resize(self.gw, self.gh)
self.win.set_position(gtk.WIN_POS_CENTER)
self.win.connect('destroy', gtk.main_quit)
#self.win.realize()
self.da = gtk.DrawingArea()
self.win.add(self.da)
self.da.set_size_request(self.gw, self.gh)
self.win.set_resizable(False)
# REGISTER HANDLERS FOR GTK EVENTS
# WINDOW / PAINT EVENTS
#
self.da.connect("expose-event", self.area_expose_cb)
# MOUSE EVENTS
#
self.da.connect("button_press_event", self.button_press_event)
self.da.connect("button_release_event", self.button_released_event)
self.da.connect("motion_notify_event", self.motion_notify_event)
#self.da.connect("scroll_event", self.scroll_event)
# KEYBOARD EVENTS
#
self.win.connect("key-press-event", self.on_key_press_event)
self.da.set_events(
gtk.gdk.EXPOSURE_MASK
| gtk.gdk.BUTTON_PRESS_MASK
| gtk.gdk.BUTTON_RELEASE_MASK
| gtk.gdk.POINTER_MOTION_MASK
| gtk.gdk.KEY_PRESS_MASK
# gtk.gdk.SCROLL_MASK
)
self.da.show()
self.win.show_all()
class GEM(object):
'''
graphical event manager
framework for handling simple process driven and interactive graphics
'''
def __init__(self, graph=None):
'''
'''
self.graph = graph
self.force_directed_graph = ForceDirectedGraph(graph=self.graph, graphical_event_manager=self)
self.last_generation_timestamp = None
self.display_node_labels = False
self.b1_down = False
self.b2_down = False
self.b3_down = False
self.b1_x = None
self.b1_y = None
self.mx = None
self.my = None
self.started = False
self.i = 0
self.win = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.win.set_title(WIN_TITLE)
self.gw = W_1
self.gh = H_1 #int(float(self.gw) / 1.618)
self.win.resize(self.gw, self.gh)
self.win.set_position(gtk.WIN_POS_CENTER)
self.win.connect('destroy', gtk.main_quit)
#self.win.realize()
self.da = gtk.DrawingArea()
self.win.add(self.da)
self.da.set_size_request(self.gw, self.gh)
self.win.set_resizable(False)
# REGISTER HANDLERS FOR GTK EVENTS
# WINDOW / PAINT EVENTS
#
self.da.connect("expose-event", self.area_expose_cb)
# MOUSE EVENTS
#
self.da.connect("button_press_event", self.button_press_event)
self.da.connect("button_release_event", self.button_released_event)
self.da.connect("motion_notify_event", self.motion_notify_event)
#self.da.connect("scroll_event", self.scroll_event)
# KEYBOARD EVENTS
#
self.win.connect("key-press-event", self.on_key_press_event)
self.da.set_events(
gtk.gdk.EXPOSURE_MASK
| gtk.gdk.BUTTON_PRESS_MASK
| gtk.gdk.BUTTON_RELEASE_MASK
| gtk.gdk.POINTER_MOTION_MASK
| gtk.gdk.KEY_PRESS_MASK
# gtk.gdk.SCROLL_MASK
)
self.da.show()
self.win.show_all()
def area_expose_cb(self, area, event):
'''
'''
self.area = area
self.style = self.da.get_style()
self.gc = self.style.fg_gc[gtk.STATE_NORMAL]
self.w, self.h = area.window.get_size()
self.started = True
return True
def button_press_event(self, widget, event):
if (event.button == 1):
# NOTE POSITION OF ORIGINAL CLICK
self.b1_x = event.x
self.b1_y = event.y
self.b1_down = True
# should do node selection here
self.last_b1_drag_position = (event.x, event.y)
self.handle_node_select_attempt(event.x, event.y)
# translated x,y for button press canvaS x,y
# check which nodes are within selection volume
# find the closest of the nodes
# select it
# change node colour based on selection
# potentially change colour of adjacent edges, and neighbout nodes
elif (event.button == 3):
self.b3_z = event.x
self.b3_down = True
elif (event.button == 2):
self.b2_down = True
elif (event.button == 4):
pass
elif (event.button == 5):
pass
return True
def motion_notify_event(self, widget, event):
'''
record mouse movement, calc deltas
call self.force_directed_graph.move(d_x, d_y, d_z), passing deltas
'''
if (self.b1_down == True):
(x_1_now, y_1_now) = (event.x, event.y)
(x_0_now, y_0_now) = self.force_directed_graph.reverse(x_1_now, y_1_now, W_0, H_0, W_1, H_1)
selected_nodes = [x for x in self.graph.nodes() if x.is_selected]
if len(selected_nodes) > 0:
selected_node = selected_nodes[0]
selected_node.position.x = x_0_now
selected_node.position.y = y_0_now
elif (self.b3_down == True):
pass
return True
def button_released_event(self, widget, event):
'''
toggle status of b1/b2/b3_down
'''
if (event.button == 1):
self.b1_down = False
elif (event.button == 2):
self.b2_down = False
elif (event.button == 3):
self.b3_down = False
return True
def on_key_press_event(self, widget, event):
self.display_node_labels = not self.display_node_labels
def handle_node_select_attempt(self, x1, y1):
x0, y0 = self.force_directed_graph.reverse(x1, y1, W_0, H_0, W_1, H_1)
# distances
r2s = {} # r2 : Node
for node in self.graph.nodes():
# r2 = (x - mx0)^2 + (y - my0)^2
r2s[node] = math.pow(node.position.x - x0, 2) + math.pow(node.position.y - y0, 2)
for node in r2s.keys():
r2 = r2s[node]
if r2 > (MINIMUM_NODE_SELECTION_RADIUS * MINIMUM_NODE_SELECTION_RADIUS):
r2s.pop(node)
closest_node = None
if len(r2s) > 0:
sorted_nodes = sorted(r2s.keys(), key = lambda x : r2s[x])
closest_node = sorted_nodes[0]
for node in self.graph.nodes():
# RESET ALL OTHER NODES
if node != closest_node:
node.is_selected = False
# TOGGLE SELECTION ON TRAGET NODE
elif node == closest_node:
node.is_selected = not node.is_selected
def time_tick_handler(self):
'''
only run if (self.started == True)
construct gdk pixmap
draw a white background
call rot.iterate on pixmap
draw pixmap to window area
show change
'''
if (self.started != True):
return True
now = time.clock()
# ------------------------------------------------------------------------
# CALC POINTER POSITION
#
# (mx0, my0) = (0,0)
# if self.mx and self.my:
# mx0, my0 = self.force_directed_graph.reverse(self.mx, self.my, W_0, H_0, W_1, H_1)
# print('Pointer (x0,y0) = (%i, %i), (x1,y1) = (%i, %i)' % (mx0, my0, self.mx, self.my))
# ------------------------------------------------------------------------
# PERIOIDIC INTERFERENCE WITH SIMULATION - ADD/REMOVE NODE @ RANDOM
#
# HANDLE GENERATION ZERO
#
if not self.last_generation_timestamp:
self.last_generation_timestamp = time.clock()
# HANDLE SUBSEQUENT GENERATIONS
#
elif now - self.last_generation_timestamp > GENERATION_INTERVAL:
node_count = len(self.graph.nodes())
min_node_count = DEMO_GRAPH_SIZE / 2
max_node_count = DEMO_GRAPH_SIZE * 2
# LOWER BOUND ON NODE COUNT
if node_count <= min_node_count:
new_node = add_node_to_graph_at_random(self.graph)
# UPPER BOUND ON NODE COUNT
elif node_count >= max_node_count:
remove_node_from_graph_at_random(self.graph)
# LAISSEZ FAIRE ZONE
else:
x = randint(1,2)
if x % 2 == 0:
remove_node_from_graph_at_random(self.graph)
else:
new_node = add_node_to_graph_at_random(self.graph)
self.last_generation_timestamp = now
# --------------------------------------------------
# print('\n'*80)
# REPORT POINTER POSITION
#
#print('(W0, H0) = %i, %i | (W1, H1) = %i, %i' % (W_0, H_0, W_1, H_1))
# REPORT ON NODES
#
#print(' ' + ('Idx').rjust(5) + ('x0').rjust(10) + ' ' + ('y0').rjust(10) + ('x1').rjust(10) + ' ' + ('y1').rjust(10))
for tag in sorted(self.graph.nodes(), key = lambda x : x.idx):
x = tag.position.x
y = tag.position.y
idx = tag.idx
tx, ty = self.force_directed_graph.translate(x, y, W_0, H_0, W_1, H_1)
selected_token = '*' if tag.is_selected else ' '
#print(selected_token + ' ' + ('%i' % idx).rjust(5) + ' ' + ('%.2f' % x).rjust(10) + ' ' + ('%.2f' % y).rjust(10)+ ' ' + ('%.2f' % tx).rjust(10) + ' ' + ('%.2f' % ty).rjust(10))
# construct pixmap
#
pixmap = gtk.gdk.Pixmap(self.da.window, self.gw, self.gh, depth=-1)
# draw white background
#
pixmap.draw_rectangle(self.style.white_gc, True, 0, 0, self.gw, self.gh)
# call rot.iterate on pixmap
#
self.force_directed_graph.iterate(pixmap, self.gc, self.style, NODE_LABEL_VERT_SPACING)
# draw pixmap to window
#
self.area.window.draw_drawable(self.gc, pixmap, 0, 0, 0, 0, -1, -1)
# show changes
#
self.area.show()
return True # return True => repeat
