Dear folks,
I wrote an ad-hoc script to generate buttons that have the 'glossy' effect.
The implementation is fairly straightforward and did work -- the buttons
themselves are rectangles with rounded corners so I call a polygon patch.
The light is simulated using a white, transparent ellipse. But there is one
problem though, the ellipse would mask anything that's above the buttons as
well.
Any people interested to take a look and suggest a solution?
Haibao
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from pylab import *
from matplotlib.patches import *
fig = figure(1,(8,8))
root = fig.add_axes([0,0,1,1])
def plot_cap(center, t, r):
x, y = center
return zip(x+r*cos(t), y+r*sin(t))
def round_rect(ax, xy, width, height, shrink=.33, label=None, **kwargs):
shrink *= height
x,y=xy
pts = []
# plot the four rounded cap one by one
pts += plot_cap((x+width-shrink, y+height-shrink), array([radians(j) for
j in range(0,90)]), shrink)
pts += [[x+width-shrink, y+height], [x+shrink, y+height]]
pts += plot_cap((x+shrink, y+height-shrink), array([radians(j) for j in
range(90,180)]), shrink)
pts += [[x, y+height-shrink], [x, y+shrink]]
pts += plot_cap((x+shrink, y+shrink), array([radians(j) for j in
range(180,270)]), shrink)
pts += [[x+shrink, y], [x+width-shrink, y]]
pts += plot_cap((x+width-shrink, y+shrink), array([radians(j) for j in
range(270,360)]), shrink)
pts += [[x+width, y+shrink], [x+width, y+height-shrink]]
ax.add_patch(Polygon(pts, **kwargs))
# add a white transparency ellipse filter
# CAUTION -- things immediately above the button will be masked too!!!
ax.add_patch(Ellipse((x+width/2.,y+height),1.6*width,height*.8,fc='w',alpha=.3,lw=0))
if label:
root.text(x+width/2.,y+height/2.,label,size=10,horizontalalignment="center",verticalalignment="center",color="w")
round_rect(root,(.45,.4),.1,.04,label="Button",lw=0,fc='k')
round_rect(root,(.15,.4),.2,.08,label="Download\nFirefox",lw=0,fc='r')
round_rect(root,(.65,.4),.2,.08,label="Google\nChrome",lw=0,fc='g')
root.set_xlim(0,1)
root.set_ylim(0,1)
root.set_axis_off()
savefig("glossy.pdf")
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