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import cairo
import gtk
import gobject
from gtk import gdk
from p5 import P5
from constants import Constants
class PhotoCanvas(P5):
def __init__(self):
P5.__init__(self)
self.img = None
self.drawImg = None
self.SCALING_IMG_ID = 0
self.cacheWid = -1
self.modify_bg( gtk.STATE_NORMAL, Constants.colorBlack.gColor )
self.modify_bg( gtk.STATE_INSENSITIVE, Constants.colorBlack.gColor )
def draw(self, ctx, w, h):
self.fillRect( ctx, Constants.colorBlack, w, h )
if (self.img != None):
if (w == self.img.get_width()):
self.cacheWid == w
self.drawImg = self.img
#only scale images when you need to, otherwise you're wasting cycles, fool!
if (self.cacheWid != w):
if (self.SCALING_IMG_ID == 0):
self.drawImg = None
self.SCALING_IMG_ID = gobject.idle_add( self.resizeImage, w, h )
if (self.drawImg != None):
#center the image based on the image size, and w & h
ctx.set_source_surface(self.drawImg, (w/2)-(self.drawImg.get_width()/2), (h/2)-(self.drawImg.get_height()/2))
ctx.paint()
self.cacheWid = w
def setImage(self, img):
self.cacheWid = -1
self.img = img
self.drawImg = None
self.queue_draw()
def resizeImage(self, w, h):
self.SCALING_IMG_ID = 0
if (self.img == None):
return
#use image size in case 640 no more
scaleImg = cairo.ImageSurface(cairo.FORMAT_ARGB32, w, h)
sCtx = cairo.Context(scaleImg)
sScl = (w+0.0)/(self.img.get_width()+0.0)
sCtx.scale( sScl, sScl )
sCtx.set_source_surface( self.img, 0, 0 )
sCtx.paint()
self.drawImg = scaleImg
self.cacheWid = w
self.queue_draw()
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