scrolled info in image

[roidayan]

hey i use canvas and image in it to output text for the user (since appuifw.Text is editable.
i want to do if the text reach the end of the screen to delete old lines from the top and move up everything then i can put more text on the screen.
i use something like:
def msg(text):
global textloc
textloc=(textloc[0],textloc[1]+15)
image.text(textloc,unicode(text), (0,0,0), (u'Series 60 J', None))
canvas.blit(image)

to output my text.
any hints how to do what i want ?

[hipp451]

Hi, it's a bit hard to understand your question. However if you want to clear a canvas or image you can use the .clear() and if you want to measure text in pixels there is the .measure text().
See more in PyS60 reference

[croozeus]

@roidayan : Please use the CODE tab (#) to post any code next time. This retains the indentations in your code and makes easier for others to follow up.

[miohtama]

hey i use canvas and image in it to output text for the user (since appuifw.Text is editable.
i want to do if the text reach the end of the screen to delete old lines from the top and move up everything then i can put more text on the screen.
i use something like:
def msg(text):
global textloc
textloc=(textloc[0],textloc[1]+15)
image.text(textloc,unicode(text), (0,0,0), (u'Series 60 J', None))
canvas.blit(image)

to output my text.
any hints how to do what i want ?

Text component might be bit too inflexible for this. Try use TextWrapper class (metioned earlier in forum topics). You also might want to double buffer output using Image to prevent screen flickering.

[roidayan]

what i ment is.
i have an Image object i use to output text. every line i increase y vector but when i reach the end of the screen
i want the upper lines to clear out and all other lines below the lines i cleared to like go up.
i guess i need to clear the entire image and output the text again ?

what did you mean about double buffer using image ? i didnt understand. i use image object inside canvas.