def __init__(self, x, y, width=200, height=80, name=None, focus=True, line_width=3.5, **kwargs):
super(VariableItem, self).__init__(**kwargs)
self.x = int(x - width / 2)
self.y = int(y - height / 2)
self.width = width
self.height = height
self.__needs_resize_calc = True
self.dragging = False
self.active_color = [0, 0, 0]
self.__old_name = ""
self.named = True
self._new = True
# this will be the variable created in the simulator
self.var = None
self.line_width = line_width
text_width = self.width - self.padding * 2 - self.icon_size
if name is not None:
self._display_name = TextInfo(name, wrap_width=text_width, align=pango.ALIGN_LEFT, placeholder_text=False)
else:
self._display_name = TextInfo(
"(enter name)", wrap_width=text_width, align=pango.ALIGN_LEFT, placeholder_text=True
)
if focus:
self.get_canvas().grab_focus(self)
self.get_canvas().grab_highlight(self)
def __init__(self, flow_from=None, name=None, start=None, end=None,
dragging=True, focus=True, line_width=9, **kwargs):
super(FlowItem, self).__init__(**kwargs)
self.__needs_resize_calc = True
self.dragging = dragging
self.active_color = [0, 0, 0]
self.__old_name = ""
self.arrow_size = 20
self.named = True
if flow_from:
start_coord = flow_from.abs_center()
self.x1 = start_coord[0]
self.y1 = start_coord[1]
self.x2 = start_coord[0]
self.y2 = start_coord[1]
# keep track of where we're coming from, even if its a cloud.
self.flow_from = flow_from
#now make sure we update our endpoints when the targets move
self.__start_cb = self.flow_from.connect("item_moved_event",
self.update_point)
else:
if not start or not end:
logging.error("flow_from and start or end undefined!")
return
self.x1, self.y1 = start
self.x2, self.y2 = end
self.flow_from = None
self.flow_to = None
self._new = True
# this will be the variable created in the simulator
self.var = None
self.line_width = line_width
if name is not None:
self._display_name = TextInfo(name,
placeholder_text=False)
else:
self._display_name = TextInfo("(new flow)",
placeholder_text=True)
if focus:
self.get_canvas().grab_focus(self)
self.get_canvas().grab_highlight(self)
def __init__(self,
x,
y,
width=200,
height=80,
name=None,
focus=True,
line_width=3.5,
**kwargs):
super(VariableItem, self).__init__(**kwargs)
self.x = int(x - width / 2)
self.y = int(y - height / 2)
self.width = width
self.height = height
self.__needs_resize_calc = True
self.dragging = False
self.active_color = [0, 0, 0]
self.__old_name = ""
self.named = True
self._new = True
# this will be the variable created in the simulator
self.var = None
self.line_width = line_width
text_width = self.width - self.padding * 2 - self.icon_size
if name is not None:
self._display_name = TextInfo(name,
wrap_width=text_width,
align=pango.ALIGN_LEFT,
placeholder_text=False)
else:
self._display_name = TextInfo("(enter name)",
wrap_width=text_width,
align=pango.ALIGN_LEFT,
placeholder_text=True)
if focus:
self.get_canvas().grab_focus(self)
self.get_canvas().grab_highlight(self)
def __init__(self, x, y, width=140, height=80, name=None,
focus=True, line_width=3.5, **kwargs):
super(StockItem, self).__init__(**kwargs)
self._new = True
# this will be the variable created in the simulator
self.var = None
self.x = int(x - width/2)
self.y = int(y - height/2)
self.width = width
self.height = height
self.dragging = False
self.active_color = [0, 0, 0]
self.line_width = line_width
self.__old_name = ""
self.named = True
# keep track of inflows and outflows, for use in engine
self.inflows = []
self.outflows = []
text_width = self.width - self.padding*2
if name is not None:
self._display_name = TextInfo(name, wrap_width=text_width,
placeholder_text=False)
else:
self._display_name = TextInfo("(enter name)", wrap_width=text_width,
placeholder_text=True)
self.__needs_resize_calc = True
if focus:
self.get_canvas().grab_focus(self)
self.get_canvas().grab_highlight(self)
class FlowItem(SimItem):
def __init__(self, flow_from=None, name=None, start=None, end=None,
dragging=True, focus=True, line_width=9, **kwargs):
super(FlowItem, self).__init__(**kwargs)
self.__needs_resize_calc = True
self.dragging = dragging
self.active_color = [0, 0, 0]
self.__old_name = ""
self.arrow_size = 20
self.named = True
if flow_from:
start_coord = flow_from.abs_center()
self.x1 = start_coord[0]
self.y1 = start_coord[1]
self.x2 = start_coord[0]
self.y2 = start_coord[1]
# keep track of where we're coming from, even if its a cloud.
self.flow_from = flow_from
#now make sure we update our endpoints when the targets move
self.__start_cb = self.flow_from.connect("item_moved_event",
self.update_point)
else:
if not start or not end:
logging.error("flow_from and start or end undefined!")
return
self.x1, self.y1 = start
self.x2, self.y2 = end
self.flow_from = None
self.flow_to = None
self._new = True
# this will be the variable created in the simulator
self.var = None
self.line_width = line_width
if name is not None:
self._display_name = TextInfo(name,
placeholder_text=False)
else:
self._display_name = TextInfo("(new flow)",
placeholder_text=True)
if focus:
self.get_canvas().grab_focus(self)
self.get_canvas().grab_highlight(self)
def remove(self):
# get rid of clouds
if self.flow_from:
self.flow_from.disconnect(self.__start_cb)
if type(self.flow_from) is CloudItem:
self.get_canvas().remove_item(self.flow_from)
if self.flow_to:
self.flow_to.disconnect(self.__end_cb)
if type(self.flow_to) is CloudItem:
self.get_canvas().remove_item(self.flow_to)
super(FlowItem, self).remove()
def center(self):
return (int(self.x1 + (self.x2 - self.x1)/2),
int(self.y1 + (self.y2 - self.y1)/2))
def abs_center(self):
center = self.center()
transform = self.get_transform()
x0, y0 = 0, 0
if transform is not None:
xx, yx, xy, yy, x0, y0 = self.get_transform()
return (x0 + center[0], y0 + center[1])
def edge_point(self, end_point):
center_x, center_y = self.abs_center()
line_angle = math.atan2((end_point[1] - center_y),
(end_point[0] - center_x))
if line_angle < 0: line_angle = 2*math.pi + line_angle
radius = self.icon_size/2
center_x = center_x + radius * math.cos(line_angle)
center_y = center_y + radius * math.sin(line_angle)
return (center_x, center_y)
def do_simple_create_path(self, cr):
self.ensure_size(cr)
# define the bounding path here.
cr.rectangle(self.bounds_x1, self.bounds_y1,
self.bounds_x2, self.bounds_y2)
def ensure_size(self, cr):
if self.__needs_resize_calc:
self.bounds_x1 = float(min(self.x1, self.x2) - self.line_width)
self.bounds_y1 = float(min(self.y1, self.y2) - self.line_width)
self.bounds_x2 = float(max(self.x1, self.x2) + self.line_width)
self.bounds_y2 = float(max(self.y1, self.y2) + self.line_width)
b_w = self.bounds_x2 - self.bounds_x1
b_h = self.bounds_y2 - self.bounds_y1
b_cx = self.bounds_x1 + b_w/2.0
b_cy = self.bounds_y1 + b_h/2.0
self._display_name.update_extents(cr)
t_w = self._display_name.width
bottom_extent = b_cy + self.padding + self.icon_size/2 \
+ self._display_name.height
self.bounds_x1 = float(min(self.bounds_x1, b_cx - t_w/2.0))
self.bounds_y1 = float(min(self.bounds_y1, b_cy - self.icon_size/2 \
- self.padding))
self.bounds_x2 = float(max(self.bounds_x2, b_cx + t_w/2.0))
self.bounds_y2 = float(max(self.bounds_y2, bottom_extent))
#self._display_name.update_extents(cr)
self.__needs_resize_calc = False
self.force_redraw()
def do_simple_paint(self, cr, bounds):
cr.save()
self.ensure_size(cr)
cr.set_line_cap(cairo.LINE_CAP_ROUND)
cr.move_to(self.x1, self.y1)
angle = math.atan2(self.y2-self.y1, self.x2-self.x1)
end_x = self.x2 - math.cos(angle) * self.arrow_size
end_y = self.y2 - math.sin(angle) * self.arrow_size
cr.line_to(end_x, end_y)
cr.set_line_width(self.line_width)
cr.set_source_rgb(self.active_color[0], \
self.active_color[1], \
self.active_color[2])
cr.stroke()
# draw arrow
cr.move_to(self.x2, self.y2)
# 10/pi is 20 degrees to either side of the line
cr.line_to(self.x2 - math.cos(angle+20.0/180*pi) * self.arrow_size,
self.y2 - math.sin(angle+20.0/180*pi) * self.arrow_size)
cr.curve_to(end_x, end_y, end_x, end_y,
self.x2 - math.cos(angle-20.0/180*pi) * self.arrow_size,
self.y2 - math.sin(angle-20.0/180*pi) * self.arrow_size)
cr.close_path()
cr.set_line_width(self.line_width/1.5)
cr.set_line_join(cairo.LINE_JOIN_ROUND)
cr.stroke_preserve()
cr.set_source_rgb(1, 1, 1)
cr.fill()
cr.move_to(self.x1, self.y1)
cr.line_to((self.x2 + end_x)/2, (self.y2 + end_y)/2)
cr.set_line_width(self.line_width/3)
cr.set_source_rgb(1, 1, 1)
cr.stroke()
# print flow name
if not self._new:
center = self.center()
cr.move_to(center[0] + self.icon_size/2.0, center[1])
cr.arc(center[0], center[1], self.icon_size/2, 0, 2*math.pi)
cr.close_path()
cr.fill_preserve()
cr.set_source_rgb(self.active_color[0], \
self.active_color[1], \
self.active_color[2])
cr.stroke()
self._display_name.update_extents(cr)
y_offset = center[1] + self.padding + self._display_name.height/2.0 \
+ self.icon_size/2
cr.translate(center[0], y_offset)
# white background for text
cr.rectangle(-self._display_name.text_width/2.0,
-self._display_name.height/2.0,
self._display_name.text_width,
self._display_name.height)
cr.set_source_rgba(1, 1, 1, .8)
cr.fill()
cr.set_source_rgb(self.active_color[0], \
self.active_color[1], \
self.active_color[2])
self._display_name.show_text(cr)
cr.restore()
def set_flow_from(self, flow_from):
if self.flow_from:
self.flow_from.disconnect(self.__start_cb)
if type(self.flow_from) is CloudItem:
self.get_canvas().remove_item(self.flow_from)
self.flow_from = flow_from
self.x1, self.y1 = self.flow_from.abs_center()
self._new = False
#now make sure we update our endpoints when the targets move
self.__start_cb = self.flow_from.connect("item_moved_event",
self.update_point)
self.__needs_resize_calc = True
self.force_redraw()
def set_flow_to(self, flow_to):
if self.flow_to:
self.flow_to.disconnect(self.__end_cb)
if type(self.flow_to) is CloudItem:
self.get_canvas().remove_item(self.flow_to)
self.flow_to = flow_to
self.x2, self.y2 = self.flow_to.edge_point((self.x1, self.y2))
self.x1, self.y1 = self.flow_from.edge_point((self.x2, self.y2))
self._new = False
#now make sure we update our endpoints when the targets move
self.__end_cb = self.flow_to.connect("item_moved_event",
self.update_point)
self.dragging = False
self.__needs_resize_calc = True
self.force_redraw()
def update_point(self, item, target):
self.x1, self.y1 = self.flow_from.abs_center()
self.x2, self.y2 = self.flow_to.edge_point((self.x1, self.y1))
self.x1, self.y1 = self.flow_from.edge_point((self.x2, self.y2))
self.__needs_resize_calc = True
self.emit("item_moved_event", self)
self.force_redraw()
def xml_representation(self):
xml_string = '\
<flow>\n\
<name>%s</name>\n\
<x1>%d</x1>\n\
<y1>%d</y1>\n\
<x2>%d</x2>\n\
<y2>%d</y2>\n\
<start>%s</start>\n\
<end>%s</end>\n\
</flow>\n' % (self.name(), self.x1, self.y1,
self.x2, self.y2,
self.flow_from.name(), self.flow_to.name())
return xml_string
def name(self):
return self._display_name.string
def do_simple_is_item_at(self, x, y, cr, is_pointer_event):
self.ensure_size(cr)
b_w = self.bounds_x2 - self.bounds_x1
b_h = self.bounds_y2 - self.bounds_y1
b_cx = self.bounds_x1 + b_w/2.0
b_cy = self.bounds_y1 + b_h/2.0
self._display_name.update_extents(cr)
t_w = self._display_name.width
bottom_extent = b_cy + self.padding + self.icon_size/2 \
+ self._display_name.height
if ((x < b_cx - t_w/2.0) or (x > b_cx + t_w/2.0)) or \
((y < b_cy - self.icon_size/2 - self.padding) or (y > bottom_extent)):
return False
else:
return True
def on_key_press(self, item, target, event):
# don't allow input while we're creating the flow.
if self._new:
return False
key_name = gtk.gdk.keyval_name(event.keyval)
if key_name in self.enter_key:
self.emit("highlight_out_event", self)
elif key_name in self.delete_key:
self._display_name.backspace()
elif key_name in self.escape_key:
print("escape key!")
else:
# add key to name buffer
self._display_name.add(event.string)
self.__needs_resize_calc = True
self.force_redraw()
# return true to stop propogation
return True
def on_button_press(self, item, target, event):
canvas = self.get_canvas()
if canvas.override:
# if we're in the process of drawing a line, just
# propogate the signal.
return False
canvas.grab_focus(item)
logging.debug("**before grab")
canvas.grab_highlight(self)
logging.debug("**after grab")
if event.button is 1:
pass
elif event.button is 3:
edit_equation(self.var)
canvas.drop_highlight()
else:
print "unsupported button: %d" % event.button
return True
def on_button_release(self, item, target, event):
pass
def on_motion_notify (self, item, target, event):
if self.dragging is True:
self.x2 = event.x
self.y2 = event.y
self.__needs_resize_calc = True
self.force_redraw()
return True
return False
def on_focus_in(self, item, target, event):
return False
def on_focus_out(self, item, target, event):
return False
def on_highlight_in(self, item, target):
self.active_color = [1, .6, .2]
self.force_redraw()
#logging.debug("h_in : (%s)" % self.name())
self.__old_name = self.name()
if self.name() == "(new flow)":
self.__old_name = ""
return False
class StockItem(SimItem):
def __init__(self, x, y, width=140, height=80, name=None,
focus=True, line_width=3.5, **kwargs):
super(StockItem, self).__init__(**kwargs)
self._new = True
# this will be the variable created in the simulator
self.var = None
self.x = int(x - width/2)
self.y = int(y - height/2)
self.width = width
self.height = height
self.dragging = False
self.active_color = [0, 0, 0]
self.line_width = line_width
self.__old_name = ""
self.named = True
# keep track of inflows and outflows, for use in engine
self.inflows = []
self.outflows = []
text_width = self.width - self.padding*2
if name is not None:
self._display_name = TextInfo(name, wrap_width=text_width,
placeholder_text=False)
else:
self._display_name = TextInfo("(enter name)", wrap_width=text_width,
placeholder_text=True)
self.__needs_resize_calc = True
if focus:
self.get_canvas().grab_focus(self)
self.get_canvas().grab_highlight(self)
def do_simple_create_path(self, cr):
self.ensure_size(cr)
# define the bounding path here.
cr.rectangle(self.x - self.line_width/2.0,
self.y - self.line_width/2.0,
self.width + self.line_width/2.0,
self.height + self.line_width/2.0)
def center(self):
return (int(self.x + self.width/2), int(self.y + self.height/2))
def abs_center(self):
center = self.center()
transform = self.get_transform()
x0, y0 = 0, 0
if transform is not None:
xx, yx, xy, yy, x0, y0 = transform
return (x0 + center[0], y0 + center[1])
def edge_point(self, end_point):
center_x, center_y = self.abs_center()
line_angle = math.atan2((end_point[1] - center_y),
(end_point[0] - center_x))
if line_angle < 0: line_angle = 2*math.pi + line_angle
# should always be between 0 and .5*pi
ref_angle = math.atan2(float(self.height),float(self.width))
width = self.width/2
height = self.height/2
if line_angle < ref_angle or line_angle > 2*math.pi - ref_angle:
center_x = center_x + width
center_y = center_y + width * math.tan(line_angle)
elif line_angle > math.pi - ref_angle and line_angle < math.pi + ref_angle:
center_x = center_x - width
center_y = center_y - width * math.tan(line_angle)
if line_angle >= ref_angle and line_angle <= math.pi - ref_angle:
center_x = center_x - height * math.tan(line_angle - math.pi/2)
center_y = center_y + height
elif line_angle >= math.pi + ref_angle and \
line_angle <= 2*math.pi - ref_angle:
center_x = center_x + height * math.tan(line_angle - math.pi/2)
center_y = center_y - height
#logging.debug("line: %5.1f, ref %5.1f" % (math.degrees(line_angle),
# math.degrees(ref_angle)))
return (center_x, center_y)
def ensure_size(self, cr):
if self.__needs_resize_calc:
self._display_name.update_extents(cr)
old_center_x = self.x + self.width/2.0
old_center_y = self.y + self.height/2.0
self.height = max(self.height, \
self._display_name.height + 2*self.padding)
self.x = old_center_x - self.width/2.0
self.y = old_center_y - self.height/2.0
self.bounds_x1 = self.x - self.line_width/2.0
self.bounds_y1 = self.y - self.line_width/2.0
self.bounds_x2 = self.x + self.width + self.line_width/2.0
self.bounds_y2 = self.y + self.height + self.line_width/2.0
self.__needs_resize_calc = False
self.force_redraw()
def do_simple_paint(self, cr, bounds):
cr.save()
self.ensure_size(cr)
cr.rectangle(self.x, self.y, self.width, self.height)
cr.set_source_rgb (1, 1, 1)
cr.fill_preserve()
cr.set_line_width(self.line_width)
cr.set_source_rgb(self.active_color[0], \
self.active_color[1], \
self.active_color[2])
cr.stroke()
# translate so that our coordinate system is in the widget
center = self.center()
cr.translate(center[0], center[1])
self._display_name.show_text(cr)
cr.restore()
def xml_representation(self):
# get the center of the widget, so that we get the correct
# behavior when it loads. also, add the cairo transformation
# matrix offset.
x_center = self.bounds_x1 + self.width/2.0
y_center = self.bounds_y1 + self.height/2.0
xml_string = '\
<stock>\n\
<name>%s</name>\n\
<x>%d</x>\n\
<y>%d</y>\n\
<width>%f</width>\n\
<height>%f</height>\n\
</stock>\n' % (self._display_name.string, x_center, y_center,
self.width, self.height)
return xml_string
def name(self):
return self._display_name.string
def on_key_press(self, item, target, event):
key_name = gtk.gdk.keyval_name(event.keyval)
if key_name in self.enter_key:
self.emit("highlight_out_event", self)
elif key_name in self.delete_key:
self._display_name.backspace()
elif key_name in self.escape_key:
print("escape key!")
else:
# add key to name buffer
self._display_name.add(event.string)
self.__needs_resize_calc = True
self.force_redraw()
# return true to stop propogation
return True
def on_button_press(self, item, target, event):
canvas = self.get_canvas()
if canvas.override:
# if we're in the process of drawing a line, just
# propogate the signal. first fix the coordinates
canvas = self.get_canvas()
event.x, event.y = canvas.convert_from_item_space(self,
event.x, event.y)
return False
canvas.grab_focus(item)
logging.debug("**before grab")
canvas.grab_highlight(self)
logging.debug("**after grab")
if event.button is 1:
self.drag_x = event.x
self.drag_y = event.y
fleur = gtk.gdk.Cursor(gtk.gdk.FLEUR)
canvas = item.get_canvas()
canvas.pointer_grab(item,
gtk.gdk.POINTER_MOTION_MASK
| gtk.gdk.BUTTON_RELEASE_MASK,
fleur, event.time)
self.dragging = True
elif event.button is 3:
edit_equation(self.var)
canvas.drop_highlight()
else:
print "unsupported button: %d" % event.button
return True
def on_button_release(self, item, target, event):
if event.button is 1:
canvas = item.get_canvas()
canvas.pointer_ungrab(item, event.time)
self.dragging = False
def on_motion_notify (self, item, target, event):
if (self.dragging == True) and (event.state & gtk.gdk.BUTTON1_MASK):
new_x = event.x
new_y = event.y
item.translate(new_x - self.drag_x, new_y - self.drag_y)
self.emit("item_moved_event", self)
return True
canvas = self.get_canvas()
event.x, event.y = canvas.convert_from_item_space(self, event.x, event.y)
return False
def on_focus_in(self, item, target, event):
return False
def on_focus_out(self, item, target, event):
return False
def on_highlight_in(self, item, target):
self.active_color = [1, .6, .2]
self.force_redraw()
self.__old_name = self.name()
return False
class VariableItem(SimItem):
def __init__(self, x, y, width=200, height=80, name=None, focus=True, line_width=3.5, **kwargs):
super(VariableItem, self).__init__(**kwargs)
self.x = int(x - width / 2)
self.y = int(y - height / 2)
self.width = width
self.height = height
self.__needs_resize_calc = True
self.dragging = False
self.active_color = [0, 0, 0]
self.__old_name = ""
self.named = True
self._new = True
# this will be the variable created in the simulator
self.var = None
self.line_width = line_width
text_width = self.width - self.padding * 2 - self.icon_size
if name is not None:
self._display_name = TextInfo(name, wrap_width=text_width, align=pango.ALIGN_LEFT, placeholder_text=False)
else:
self._display_name = TextInfo(
"(enter name)", wrap_width=text_width, align=pango.ALIGN_LEFT, placeholder_text=True
)
if focus:
self.get_canvas().grab_focus(self)
self.get_canvas().grab_highlight(self)
def do_simple_create_path(self, cr):
self.ensure_size(cr)
# define the bounding path here.
cr.rectangle(
self.x - self.line_width / 2.0,
self.y - self.line_width / 2.0,
self.width + self.line_width / 2.0,
self.height + self.line_width / 2.0,
)
def center(self):
return (int(self.x + self.width / 2), int(self.y + self.height / 2))
def abs_center(self):
center = self.center()
transform = self.get_transform()
x0, y0 = 0, 0
if transform is not None:
xx, yx, xy, yy, x0, y0 = self.get_transform()
return (x0 + self.x + self.icon_size / 2.0, y0 + center[1])
def edge_point(self, end_point):
center_x, center_y = self.abs_center()
line_angle = math.atan2((end_point[1] - center_y), (end_point[0] - center_x))
if line_angle < 0:
line_angle = 2 * math.pi + line_angle
radius = self.icon_size / 2
center_x = center_x + radius * math.cos(line_angle)
center_y = center_y + radius * math.sin(line_angle)
return (center_x, center_y)
def ensure_size(self, cr):
if self.__needs_resize_calc:
self._display_name.update_extents(cr)
old_center_x = self.x + self.width / 2.0
old_center_y = self.y + self.height / 2.0
self.height = max(self.icon_size, self._display_name.height) + 2 * self.padding
self.x = old_center_x - self.width / 2.0
self.y = old_center_y - self.height / 2.0
self.bounds_x1 = self.x - self.line_width / 2.0
self.bounds_y1 = self.y - self.line_width / 2.0
self.bounds_x2 = self.x + self.width + self.line_width + 2 * self.padding
self.bounds_y2 = self.y + self.height + self.line_width + 2 * self.padding
self.__needs_resize_calc = False
self.force_redraw()
def do_simple_paint(self, cr, bounds):
cr.save()
# keep track of the transformation matrix, so we can save
# the right coordinates
matrix = cr.get_matrix()
self.ensure_size(cr)
self.type_icon(cr)
center = self.center()
cr.translate(int(center[0] + self.icon_size / 2 + self.padding), center[1])
# white background for text
cr.rectangle(
-self._display_name.width / 2.0,
-self._display_name.height / 2.0,
self._display_name.text_width,
self._display_name.height,
)
cr.set_source_rgba(1, 1, 1, 0.8)
cr.fill()
cr.set_source_rgb(self.active_color[0], self.active_color[1], self.active_color[2])
self._display_name.show_text(cr)
cr.restore()
def type_icon(self, cr):
cr.move_to(self.x + self.icon_size, self.y + 0.5 * self.height)
cr.arc(self.x + 0.5 * self.icon_size, self.y + 0.5 * self.height, self.icon_size / 2, 0, 2 * math.pi)
cr.close_path()
cr.set_source_rgb(1, 1, 1)
cr.fill_preserve()
cr.set_line_width(self.line_width)
cr.set_source_rgb(self.active_color[0], self.active_color[1], self.active_color[2])
cr.stroke()
def xml_representation(self):
# get the center of the widget, so that we get the correct
# behavior when it loads. also, add the cairo transformation
# matrix offset.
x_center = self.bounds_x1 + self.width / 2
y_center = self.bounds_y1 + self.height / 2
xml_string = (
"\
<var>\n\
<name>%s</name>\n\
<x>%d</x>\n\
<y>%d</y>\n\
<width>%f</width>\n\
<height>%f</height>\n\
</var>\n"
% (self._display_name.string, x_center, y_center, self.width, self.height)
)
return xml_string
def name(self):
return self._display_name.string
def on_key_press(self, item, target, event):
key_name = gtk.gdk.keyval_name(event.keyval)
if key_name in self.enter_key:
self.emit("highlight_out_event", self)
elif key_name in self.delete_key:
self._display_name.backspace()
elif key_name in self.escape_key:
print ("escape key!")
else:
# add key to name buffer
self._display_name.add(event.string)
self.__needs_resize_calc = True
self.force_redraw()
# return true to stop propogation
return True
def on_button_press(self, item, target, event):
canvas = self.get_canvas()
if canvas.override:
# if we're in the process of drawing a line, just
# propogate the signal. first fix the coordinates
canvas = self.get_canvas()
event.x, event.y = canvas.convert_from_item_space(self, event.x, event.y)
return False
canvas.grab_focus(item)
logging.debug("**before grab")
canvas.grab_highlight(self)
logging.debug("**after grab")
if event.button is 1:
self.drag_x = event.x
self.drag_y = event.y
fleur = gtk.gdk.Cursor(gtk.gdk.FLEUR)
canvas = item.get_canvas()
canvas.pointer_grab(item, gtk.gdk.POINTER_MOTION_MASK | gtk.gdk.BUTTON_RELEASE_MASK, fleur, event.time)
self.dragging = True
elif event.button is 3:
edit_equation(self.var, self.get_influences())
canvas.drop_highlight()
else:
print "unsupported button: %d" % event.button
return True
def on_button_release(self, item, target, event):
if event.button is 1:
canvas = item.get_canvas()
canvas.pointer_ungrab(item, event.time)
self.dragging = False
def on_motion_notify(self, item, target, event):
if (self.dragging == True) and (event.state & gtk.gdk.BUTTON1_MASK):
new_x = event.x
new_y = event.y
item.translate(new_x - self.drag_x, new_y - self.drag_y)
self.emit("item_moved_event", self)
return True
canvas = self.get_canvas()
event.x, event.y = canvas.convert_from_item_space(self, event.x, event.y)
return False
def on_focus_in(self, item, target, event):
return False
def on_focus_out(self, item, target, event):
return False
def on_highlight_in(self, item, target):
self.active_color = [1, 0.6, 0.2]
self.force_redraw()
logging.debug("h_in : '%s'" % self.name())
self.__old_name = self.name()
return False
class VariableItem(SimItem):
def __init__(self,
x,
y,
width=200,
height=80,
name=None,
focus=True,
line_width=3.5,
**kwargs):
super(VariableItem, self).__init__(**kwargs)
self.x = int(x - width / 2)
self.y = int(y - height / 2)
self.width = width
self.height = height
self.__needs_resize_calc = True
self.dragging = False
self.active_color = [0, 0, 0]
self.__old_name = ""
self.named = True
self._new = True
# this will be the variable created in the simulator
self.var = None
self.line_width = line_width
text_width = self.width - self.padding * 2 - self.icon_size
if name is not None:
self._display_name = TextInfo(name,
wrap_width=text_width,
align=pango.ALIGN_LEFT,
placeholder_text=False)
else:
self._display_name = TextInfo("(enter name)",
wrap_width=text_width,
align=pango.ALIGN_LEFT,
placeholder_text=True)
if focus:
self.get_canvas().grab_focus(self)
self.get_canvas().grab_highlight(self)
def do_simple_create_path(self, cr):
self.ensure_size(cr)
# define the bounding path here.
cr.rectangle(self.x - self.line_width / 2.0,
self.y - self.line_width / 2.0,
self.width + self.line_width / 2.0,
self.height + self.line_width / 2.0)
def center(self):
return (int(self.x + self.width / 2), int(self.y + self.height / 2))
def abs_center(self):
center = self.center()
transform = self.get_transform()
x0, y0 = 0, 0
if transform is not None:
xx, yx, xy, yy, x0, y0 = self.get_transform()
return (x0 + self.x + self.icon_size / 2.0, y0 + center[1])
def edge_point(self, end_point):
center_x, center_y = self.abs_center()
line_angle = math.atan2((end_point[1] - center_y),
(end_point[0] - center_x))
if line_angle < 0: line_angle = 2 * math.pi + line_angle
radius = self.icon_size / 2
center_x = center_x + radius * math.cos(line_angle)
center_y = center_y + radius * math.sin(line_angle)
return (center_x, center_y)
def ensure_size(self, cr):
if self.__needs_resize_calc:
self._display_name.update_extents(cr)
old_center_x = self.x + self.width / 2.0
old_center_y = self.y + self.height / 2.0
self.height = max(self.icon_size, self._display_name.height) \
+ 2*self.padding
self.x = old_center_x - self.width / 2.0
self.y = old_center_y - self.height / 2.0
self.bounds_x1 = self.x - self.line_width / 2.0
self.bounds_y1 = self.y - self.line_width / 2.0
self.bounds_x2 = self.x + self.width + self.line_width \
+ 2*self.padding
self.bounds_y2 = self.y + self.height + self.line_width \
+ 2*self.padding
self.__needs_resize_calc = False
self.force_redraw()
def do_simple_paint(self, cr, bounds):
cr.save()
# keep track of the transformation matrix, so we can save
# the right coordinates
matrix = cr.get_matrix()
self.ensure_size(cr)
self.type_icon(cr)
center = self.center()
cr.translate(int(center[0] + self.icon_size / 2 + self.padding),
center[1])
# white background for text
cr.rectangle(-self._display_name.width / 2.0,
-self._display_name.height / 2.0,
self._display_name.text_width, self._display_name.height)
cr.set_source_rgba(1, 1, 1, .8)
cr.fill()
cr.set_source_rgb(self.active_color[0], \
self.active_color[1], \
self.active_color[2])
self._display_name.show_text(cr)
cr.restore()
def type_icon(self, cr):
cr.move_to(self.x + self.icon_size, self.y + .5 * self.height)
cr.arc(self.x + .5 * self.icon_size, self.y + .5 * self.height,
self.icon_size / 2, 0, 2 * math.pi)
cr.close_path()
cr.set_source_rgb(1, 1, 1)
cr.fill_preserve()
cr.set_line_width(self.line_width)
cr.set_source_rgb(self.active_color[0], \
self.active_color[1], \
self.active_color[2])
cr.stroke()
def xml_representation(self):
# get the center of the widget, so that we get the correct
# behavior when it loads. also, add the cairo transformation
# matrix offset.
x_center = self.bounds_x1 + self.width / 2
y_center = self.bounds_y1 + self.height / 2
xml_string = '\
<var>\n\
<name>%s</name>\n\
<x>%d</x>\n\
<y>%d</y>\n\
<width>%f</width>\n\
<height>%f</height>\n\
</var>\n' % (self._display_name.string, x_center, y_center, self.width,
self.height)
return xml_string
def name(self):
return self._display_name.string
def on_key_press(self, item, target, event):
key_name = gtk.gdk.keyval_name(event.keyval)
if key_name in self.enter_key:
self.emit("highlight_out_event", self)
elif key_name in self.delete_key:
self._display_name.backspace()
elif key_name in self.escape_key:
print("escape key!")
else:
# add key to name buffer
self._display_name.add(event.string)
self.__needs_resize_calc = True
self.force_redraw()
# return true to stop propogation
return True
def on_button_press(self, item, target, event):
canvas = self.get_canvas()
if canvas.override:
# if we're in the process of drawing a line, just
# propogate the signal. first fix the coordinates
canvas = self.get_canvas()
event.x, event.y = canvas.convert_from_item_space(
self, event.x, event.y)
return False
canvas.grab_focus(item)
logging.debug("**before grab")
canvas.grab_highlight(self)
logging.debug("**after grab")
if event.button is 1:
self.drag_x = event.x
self.drag_y = event.y
fleur = gtk.gdk.Cursor(gtk.gdk.FLEUR)
canvas = item.get_canvas()
canvas.pointer_grab(
item, gtk.gdk.POINTER_MOTION_MASK
| gtk.gdk.BUTTON_RELEASE_MASK, fleur, event.time)
self.dragging = True
elif event.button is 3:
edit_equation(self.var, self.get_influences())
canvas.drop_highlight()
else:
print "unsupported button: %d" % event.button
return True
def on_button_release(self, item, target, event):
if event.button is 1:
canvas = item.get_canvas()
canvas.pointer_ungrab(item, event.time)
self.dragging = False
def on_motion_notify(self, item, target, event):
if (self.dragging == True) and (event.state & gtk.gdk.BUTTON1_MASK):
new_x = event.x
new_y = event.y
item.translate(new_x - self.drag_x, new_y - self.drag_y)
self.emit("item_moved_event", self)
return True
canvas = self.get_canvas()
event.x, event.y = canvas.convert_from_item_space(
self, event.x, event.y)
return False
def on_focus_in(self, item, target, event):
return False
def on_focus_out(self, item, target, event):
return False
def on_highlight_in(self, item, target):
self.active_color = [1, .6, .2]
self.force_redraw()
logging.debug("h_in : '%s'" % self.name())
self.__old_name = self.name()
return False