Croozeus - Tutorials - Drawing, Opening and Editing an Image.

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Drawing:

#Drawing on an image

#You can draw several shapes on images

import graphics, e32, appuifw
from math import pi

#Define the exit function
app_lock=e32.Ao_lock()
def quit():
app_lock.signal()
appuifw.app.exit_key_handler=quit

canvas=appuifw.Canvas()
appuifw.app.body=canvas
appuifw.app.screen="full"

#Line
canvas.line((30,40,170,15), 0)
e32.ao_sleep(1)

#Rectangle
canvas.rectangle((30,45,110,100), fill=0xCC55EE) #Draws a purple rectangle
e32.ao_sleep(1)

#Dot
canvas.point((200,180), (253,46,103), width=4)
e32.ao_sleep(1)

#Ellipse
canvas.ellipse((22,260,58,280), fill=0x339900)
e32.ao_sleep(1)

app_lock.wait()

Opening:

#Opening an image or creating a blank one

import graphics, e32, appuifw

#Define the exit function
def quit():
app_lock.signal()
appuifw.app.exit_key_handler=quit

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

#We open an existing picture
pic=graphics.Image.open("C:\\mypicture.jpg")
#And also make a blank one
img=graphics.Image.new((240,320)) #Remember to specify the appropriate size in pixels

canvas.blit(pic)
#Sets the background as the picture

#Wait 5 seconds
e32.ao_sleep(5)

canvas.blit(img)
#Sets the background to the blank image

app_lock=e32.Ao_lock()
app_lock.wait()

Editing an Image:

#Editing an image - resizing, transposing and saving

import graphics, e32, appuifw

#Define the exit function
def quit():
    app_lock.signal()
appuifw.app.exit_key_handler=quit

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

#We open the image we want to edit
img=graphics.Image.open("C:\\pic.jpg")

#We define the functions that do the editing and saving, for the menu
def resize():
    global img, canvas
    newx, newy=appuifw.multi_query([u"Enter width", u"Enter hight"]) #Asks for the new size
    img=img.resize((newx,newy))
    canvas.blit(img)

def transpose():
    global img, canvas
    img=img.transpose(ROTATE_90) #Rotates by 90 degrees
    canvas.blit(img)

def save():
    global img
    name=appuifw.query(u"Enter a name for the new image", "text")
    img.save("C:\\"+name+".jpg")

#Set the application's menu
appuifw.app.menu=[(u"Resize", resize), (u"Transpose", transpose), (u"Save", save), (u"Exit", quit)]

#Display the image
canvas.blit(img)

app_lock=e32.Ao_lock()
app_lock.wait()