DZone Snippets: icon code

HTML - AddIcon

whitetiger () — Fri, 03 Nov 2006 19:44:06 GMT

Show all icons in avkon.mbm

korakot (Korakot Chaovavanich) — Tue, 14 Feb 2006 16:41:43 GMT

There are 2 type of mbm files. The following code work with
ROM-type (most mbm on Z:\) only.



>>> from appuifw import *

>>> avkon = u'z:\\system\\data\\avkon.mbm'

>>> def showicon(id_list, maskfunc=lambda x:x):

...     if type(id_list) == int:

...         id_list = [id_list] # one item

...     entries = []

...     if type(maskfunc) == dict:  # allow dict as a func

...         func = lambda id: maskfunc.get(id,id)

...     else:

...         func = maskfunc

...     for id in id_list:

...         item = u'%s, %s' % (id, func(id))

...         icon = Icon(avkon, id, func(id))

...         entries.append((item, u'', icon))

...     app.body = Listbox(entries, lambda: None)

...

>>> showicon(range(503))  # all icons, including mask

>>> showicon(range(0,100,2), lambda x:x+1)  # first 50 icons, with their mask brother

Reading a 24-bit icon in an mbm file

korakot (Korakot Chaovavanich) — Tue, 14 Feb 2006 12:27:42 GMT

Here's an example how I read the icon and display it on canvas
It's a continued part of my previous mbm hack.



>>> from appuifw import *

>>> from struct import unpack

>>> def readL(f, pos=None):     # helping function

...     if pos is not None:

...         f.seek(pos)

...     return unpack('L', f.read(4))[0]

...

>>> fxmbm = 'E:\\system\\apps\\FExplorer\\FExplorer.mbm'

>>> f = open(fxmbm, 'rb')

>>> trailer = readL(f, 16)

>>> num = readL(f, trailer)   # 19 icons

>>> offset = []

>>> for i in range(num):

...   offset.append(readL(f))

...

>>> offset

[20L, 68L, 116L, 474L, 588L, 1038L, 1228L, 1636L, 1864L, 2277L, 2430L, 3735L, 41

69L, 4569L, 4697L, 5197L, 5370L, 5897L, 6062L]

>>> start = offset[2]  # folder icon

>>> f.seek(start)

>>> length = readL(f) - readL(f)    # length of data section

>>> width, height = readL(f), readL(f)  # 16 x 13

>>> f.seek(start+0x28)  # start of data section

>>> data_enc = f.read(length)   # got the data

>>> def rle24_decode(bytes):

...     out = []

...     i = 0

...     while i < len(bytes):

...         n = ord(bytes[i])

...         i += 1

...         if n < 0x80:

...             out.append( bytes[i:i+3] * (n+1) )

...             i += 3

...         else:

...             n = 0x100 - n

...             out.append( bytes[i:i+3*n] )

...             i += 3*n

...     return ''.join(out)

...

>>> data = rel24_decode(data_enc)

>>> app.body = canvas = Canvas()

>>> for j in range(height):

...     for i in range(width):

...         p = 3*(j*width+i)

...         color = [ord(data[p+k]) for k in (2,1,0)]  # It's BGR

...         canvas.point((i,j), tuple(color))

...

>>>  # folder icon is drawn on screen

Counting number of bitmaps in an mbm file

korakot (Korakot Chaovavanich) — Mon, 13 Feb 2006 22:32:04 GMT

I continue my hacking on symbian mbm(multi-bitmap) format.



# a helping function

from struct import unpack

def readL(f, pos=None):

    if pos is not None:

        f.seek(pos)

    return unpack('L', f.read(4))[0]



# the real counting function

def mbm_count(mbm_file):

    f = open(mbm_file, 'rb')

    mbm_type = readL(f)

    if mbm_type == 0x10000041:  # mbm on ROM (Z:)

        return readL(f) 

    elif mbm_type == 0x10000037L:  # mbm on file (normal)

        return readL(f, readL(f, 16)) # read at trailer

    else:       # what type is it?

        return None

For example (you may try this on your phone)



>>> mbm_count('z:\\system\\data\\avkon.mbm')

503L

>>> mbm_count('E:\\system\\apps\\FExplorer\\FExplorer.mbm')

19L

>>>

Using Icon as Image

korakot (Korakot Chaovavanich) — Sun, 03 Jul 2005 02:02:10 GMT

Pys60 1.1.3 have 2 differnt classes for graphics data.
Icon class represents icon (typically from .mbm file)
which can be put in ListBox for selection.
Image class represents a bigger image which can be
drawn upon. These 2 classes can't convert to/from
each other.

So, I create a library that read .mbm file and draw
an Image from the data there. So, you can make
an icon into an image (now only 1-bit icons).
the module can be downloaded from here
http://larndham.net/service/pys60/icon_image.py



from appuifw import *

import icon_image, e32



app.body = c = Canvas()

# choose a bitmap from plenty inside mbm (multi-bitmap)

icon = icon_image('z:\\system\\data\\avkon.mbm', 28) 

c.blit(icon)



e32.ao_sleep(10)  # 10 sec to end program

Look here for more information.
http://discussion.forum.nokia.com/forum/showthread.php?s=&threadid=63608

Using icons in Listbox

korakot (Korakot Chaovavanich) — Fri, 01 Jul 2005 15:24:44 GMT

pys60 1.1.3 provide some graphics capabilitis.
One of them is using icons in Listbox
(code taken from pys60 API reference)



icon1 = appuifw.Icon(u"z:\\system\\data\\avkon.mbm", 28, 29)

icon2 = appuifw.Icon(u"z:\\system\\data\\avkon.mbm ", 40, 41)

entries = [(u"Signal", icon1),

           (u"Battery", icon2)]

lb = appuifw.Listbox(entries, lbox_observe)

Listbox is one of the 3 types that can be assigned to app.body
(i.e. Text, Listbox, Canvas)
So, to make code above able to run, you must add
appuifw.app.body = lb
and the function lbox_observe that will handle the selection
need to be defined.