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Archived:How to draw directly to the phone screen using PySymbian

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Archived.pngAquivado: Este artigo foi arquivado, pois o conteúdo não é mais considerado relevante para se criar soluções comerciais atuais. Se você achar que este artigo ainda é importante, inclua o template {{ForArchiveReview|escreva a sua justificativa}}.

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Article Metadata
Tested with
Devices(s): S60 3rd Edition FP1 SDK
Compatibility
Platform(s): S60 2nd Edition, S60 3rd Edition
Article
Keywords: fgimage
Created: cyke64 (19 Mar 2007)
Last edited: hamishwillee (31 May 2013)

Introduction

You can draw directly to the phone screen. It is useful for a notification from a background program. You need to install fgimage module :

Code Snippets

The following code snippet draws hello world and clears it after 1 second.

import fgimage, e32
from graphics import Image
 
img = Image.new((100, 16)) # create a notification text
img.text((0, 14), u'Hello world', 0)
 
fg = fgimage.FGImage()
x, y = 0, 40 # position to draw
fg.set(x, y, img._bitmapapi()) # send it
 
e32.ao_sleep(1)
fg.unset() # then clear it
import e32
from graphics import *
import fgimage
 
img = Image.new((100, 16))
fg = fgimage.FGImage()
text = u"This is where the text goes"
 
# Does simple scrolling
i = 0
while i < len(text):
 
img.clear((0, 255, 255))
img.text((0, 14), text[i:], 0)
fg.set(0, 40, img._bitmapapi())
e32.ao_sleep(0.2) # 200 ms sleep
i += 1
 
fg.unset()

The following code snippet draws on the phone screen, fetches the pixel value and draws the same pixel somewhere else.

import e32
from graphics import *
import fgimage
 
 
image = Image.new((176, 208))
image.point((10,10), 0x00ff00, width=10) # green
value = fgimage.getpixel(10, 10, img._bitmapapi())
img.point((20,20), value, width=1)
print hex(value)
 
def drawit():
canvas.blit(image)
 
appuifw.app.body = canvas = appuifw.Canvas()
drawit()
e32.ao_sleep(5)

See Also

This page was last modified on 31 May 2013, at 01:08.
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