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| import numpy as np
import matplotlib.colors as colors
import matplotlib.patches as patches
import matplotlib.mathtext as mathtext
import matplotlib.pyplot as plt
import matplotlib.artist as artist
import matplotlib.image as image
class ItemProperties(object):
def __init__(self, fontsize=14, labelcolor='black', bgcolor='yellow',
alpha=1.0):
self.fontsize = fontsize
self.labelcolor = labelcolor
self.bgcolor = bgcolor
self.alpha = alpha
self.labelcolor_rgb = colors.to_rgba(labelcolor)[:3]
self.bgcolor_rgb = colors.to_rgba(bgcolor)[:3]
class MenuItem(artist.Artist):
parser = mathtext.MathTextParser("Bitmap")
padx = 5
pady = 5
def __init__(self, fig, labelstr, props=None, hoverprops=None,
on_select=None):
artist.Artist.__init__(self)
self.set_figure(fig)
self.labelstr = labelstr
if props is None:
props = ItemProperties()
if hoverprops is None:
hoverprops = ItemProperties()
self.props = props
self.hoverprops = hoverprops
self.on_select = on_select
x, self.depth = self.parser.to_mask(
labelstr, fontsize=props.fontsize, dpi=fig.dpi)
if props.fontsize != hoverprops.fontsize:
raise NotImplementedError(
'support for different font sizes not implemented')
self.labelwidth = x.shape[1]
self.labelheight = x.shape[0]
self.labelArray = np.zeros((x.shape[0], x.shape[1], 4))
self.labelArray[:, :, -1] = x/255.
self.label = image.FigureImage(fig, origin='upper')
self.label.set_array(self.labelArray)
self.rect = patches.Rectangle((0, 0), 1, 1)
self.set_hover_props(False)
fig.canvas.mpl_connect('button_release_event', self.check_select)
def check_select(self, event):
over, junk = self.rect.contains(event)
if not over:
return
if self.on_select is not None:
self.on_select(self)
def set_extent(self, x, y, w, h):
print(x, y, w, h)
self.rect.set_x(x)
self.rect.set_y(y)
self.rect.set_width(w)
self.rect.set_height(h)
self.label.ox = x + self.padx
self.label.oy = y - self.depth + self.pady/2.
self.hover = False
def draw(self, renderer):
self.rect.draw(renderer)
self.label.draw(renderer)
def set_hover_props(self, b):
if b:
props = self.hoverprops
else:
props = self.props
r, g, b = props.labelcolor_rgb
self.labelArray[:, :, 0] = r
self.labelArray[:, :, 1] = g
self.labelArray[:, :, 2] = b
self.label.set_array(self.labelArray)
self.rect.set(facecolor=props.bgcolor, alpha=props.alpha)
def set_hover(self, event):
'check the hover status of event and return true if status is changed'
b, junk = self.rect.contains(event)
changed = (b != self.hover)
if changed:
self.set_hover_props(b)
self.hover = b
return changed
class Menu(object):
def __init__(self, fig, menuitems):
self.figure = fig
fig.suppressComposite = True
self.menuitems = menuitems
self.numitems = len(menuitems)
maxw = max(item.labelwidth for item in menuitems)
maxh = max(item.labelheight for item in menuitems)
totalh = self.numitems*maxh + (self.numitems + 1)*2*MenuItem.pady
x0 = 100
y0 = 400
width = maxw + 2*MenuItem.padx
height = maxh + MenuItem.pady
for item in menuitems:
left = x0
bottom = y0 - maxh - MenuItem.pady
item.set_extent(left, bottom, width, height)
fig.artists.append(item)
y0 -= maxh + MenuItem.pady
fig.canvas.mpl_connect('motion_notify_event', self.on_move)
def on_move(self, event):
draw = False
for item in self.menuitems:
draw = item.set_hover(event)
if draw:
self.figure.canvas.draw()
break
fig = plt.figure()
fig.subplots_adjust(left=0.3)
props = ItemProperties(labelcolor='black', bgcolor='yellow',
fontsize=15, alpha=0.2)
hoverprops = ItemProperties(labelcolor='white', bgcolor='blue',
fontsize=15, alpha=0.2)
menuitems = []
for label in ('open', 'close', 'save', 'save as', 'quit'):
def on_select(item):
print('you selected %s' % item.labelstr)
item = MenuItem(fig, label, props=props, hoverprops=hoverprops,
on_select=on_select)
menuitems.append(item)
menu = Menu(fig, menuitems)
plt.show()
|
