Finally got back to this. While I was trying to work out how to do
what Alex described I found an alternate method to do it.
Essentially I just get the _style_runs dictionary, and text string
from the document to save it. To restore the state I simply impose
these on a new document. The style operations are controlled by the
methods getStyle and restoreStyle in the demo code below.
Seems to work, without having to understand much outside of the
_style_runs dictionary format.
Is this to simplistic and is there some reason I'll regret doing it
this way?
Regards
john
Here is my new label and code to exercise it in case anyone is
interested. Press A to just impose the styles from "Hello World" on
the other string, press B to copy the text and style from "Hello
World"
class JLabel(DocumentLabel):
'''Text label.
'''
def __init__(self, text='',
font_name=None, font_size=None, bold=False,
italic=False,
color=(255, 255, 255, 255),
x=0, y=0, width=None, height=None,
anchor_x='left', anchor_y='baseline',
halign='left',
multiline=False, dpi=None, batch=None, group=None):
document = decode_attributed(text)
super(JLabel, self).__init__(document, x, y, width, height,
anchor_x, anchor_y,
multiline, dpi, batch, group)
style = dict(halign=halign)
if font_name:
style['font_name'] = font_name
if font_size:
style['font_size'] = font_size
if bold:
style['bold'] = bold
if italic:
style['italic'] = italic
if color:
style['color'] = color
self.document.set_style(0, len(self.document.text), style)
def getStyle(self):
return self.document._style_runs
def restoreStyle(self, styleDict):
for k in styleDict.keys():
for i in styleDict[k]:
self.document.set_style(i[0], i[1], {k : i[2]})
def backup(self):
""" Gets the text and style data for a backup
Returns
text, styleDict
"""
return self.document.text, self.getStyle()
def restore(self, text, style):
self.document.text = text
self.restoreStyle(style)
window = pyglet.window.Window()
@window.event
def on_key_press(symbol, modifiers):
if symbol == key.A:
print "Change the label"
label2.restoreStyle(label.getStyle())
elif symbol == key.B:
print "Restore the label"
t, s = label.backup()
label2.restore(t,s)
label = JLabel('{bold True}Hello,{bold False} world',
font_name='Times New Roman',
font_size=36,
x=window.width//2, y=window.height//2,
anchor_x='center', anchor_y='center')
label2 = JLabel('Hi one & all',
font_name='Times New Roman',
font_size=12,
x=window.width//4, y=window.height//4,
anchor_x='center', anchor_y='center')
@window.event
def on_draw():
window.clear()
label.draw()
label2.draw()
pyglet.app.run()
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