DZone Snippets: palette code http://snippets.dzone.com/posts Mon, 06 Oct 2008 09:36:50 GMT DZone Snippets: palette code Retrieve the color from an SVG shape http://snippets.dzone.com/posts/show/5291 <code> <br /> <rect id="c1" x="510" <br />y="120" width="20px" height="20px" fill="pink" stroke="blue" onclick="setPenColour(evt)"/> <br /> <![CDATA[ <br /> function setPenColour(evt) { <br /> m_pen_colour = evt.target.getAttribute('fill'); <br /> } <br /> ]]> <br /></code> <br />Reference: <br /><a href="http://www.kevlindev.com/tutorials/basics/index.htm">Tutorials - SVG</a> [kevlindev.com] <br /><a href="http://www.kevlindev.com/tutorials/basics/events/mouse/svg_js/index.htm">Tutorials - SVG - Events</a> [kevlindev.com] Sun, 30 Mar 2008 14:37:02 GMT http://snippets.dzone.com/posts/show/5291 jrobertson (James Robertson) Color picker http://snippets.dzone.com/posts/show/1493 I saw someone write a fileselect dialog a few days ago. <br />I think we should have more dialog type to use in our apps. <br />So, I write a color picker code below. <br />It can be converted easily into a dialog component. <br /> <br /><code> <br />// Usual code as always <br />import e32 <br />from appuifw import * <br />from key_codes import * <br /> <br />class Keyboard(object): <br /> def __init__(self): <br /> self.state = {} # is this key pressing ? <br /> self.buffer= {} # is it waiting to be processed ? <br /> def handle_event(self, event): # for event_callback <br /> code = event['scancode'] <br /> if event['type'] == EEventKeyDown: <br /> self.buffer[code]= 1 # put into queue <br /> self.state[code] = 1 <br /> elif event['type'] == EEventKeyUp: <br /> self.state[code] = 0 <br /> def pressing(self, code): # just check <br /> return self.state.get(code,0) <br /> def pressed(self, code): # check and process the event <br /> if self.buffer.get(code,0): <br /> self.buffer[code] = 0 # take out of queue <br /> return 1 <br /> return 0 <br /> <br />key = Keyboard() <br />app.body = canvas = Canvas(event_callback=key.handle_event) <br /> <br />def quit(): <br /> global running <br /> running = 0 <br /> <br />app.exit_key_handler = quit <br />running = 1 <br /></code> <br />At first, I wanted to use the <a href=http://www.bigbold.com/snippets/posts/show/1475>standard palette</a> of s60. <br />But later decide to just use 216 web-safe colors. <br />The code is simpler, so the concept is easier to understand. <br /><code> <br />ff00 = range(0xff, -1, -0x33) <br />pal = [(r,g,b) for r in ff00 for g in ff00 for b in ff00] # web-safe <br />map_j = range(0,12,2)+range(11,0,-2) # make better grouping <br />for j in range(12): <br /> for i in range(18): <br /> k = 18*map_j[j] + i <br /> canvas.rectangle([(9*i+1, 9*j+1), (9*i+9, 9*j+9)], None, pal[k]) <br /> <br />def clear_box(color=0xffffff): <br /> global x,y <br /> canvas.rectangle([(9*x, 9*y), (9*x+10, 9*y+10)], color) # cursor <br /> <br />x, y = 0, 0 <br />black_white = 0 <br />while running: <br /> if key.pressed(EScancodeLeftArrow): <br /> clear_box() <br /> if x > 0: x -= 1 <br /> if key.pressed(EScancodeRightArrow): <br /> clear_box() <br /> if x < 17: x += 1 <br /> if key.pressed(EScancodeUpArrow): <br /> clear_box() <br /> if y > 0: y -= 1 <br /> if key.pressed(EScancodeDownArrow): <br /> clear_box() <br /> if y < 11: y += 1 <br /> if key.pressed(EScancodeSelect): <br /> color = pal[18*map_j[y] + x] <br /> canvas.rectangle([(1,109), (17*9+9,130)], None, color) # show color <br /> black_white ^= 0xffffff # toggle <br /> clear_box(black_white) <br /> e32.ao_sleep(0.2) <br /></code> <br />See <a href=http://www.frappr.com/pys60/photo/1357584>Screenshot</a>. Wed, 15 Feb 2006 23:53:25 GMT http://snippets.dzone.com/posts/show/1493 korakot (Korakot Chaovavanich) Getting symbian's default palette table http://snippets.dzone.com/posts/show/1475 After a night hacking what is the 8-bit color for mbm format. <br />I finally found <a href=http://forum.newlc.com/index.php?topic=5744#msg29359>this thead</a> about standard palette. <br /> <br />So, I make this pallete mapping table to use with 8-bit icons. <br /><code> <br />palette_string = '''0x00000000 <br />0x00CCFFFF <br />0x0099FFFF <br />0x0066FFFF <br />0x0033FFFF <br />0x0000FFFF <br />0x00FFCCFF <br />0x00CCCCFF <br />0x0099CCFF <br />0x0066CCFF <br />0x0033CCFF <br />0x0000CCFF <br />0x00FF99FF <br />0x00CC99FF <br />0x009999FF <br />0x006699FF <br />0x003399FF <br />0x000099FF <br />0x00FF66FF <br />0x00CC66FF <br />0x009966FF <br />0x006666FF <br />0x003366FF <br />0x000066FF <br />0x00FF33FF <br />0x00CC33FF <br />0x009933FF <br />0x006633FF <br />0x003333FF <br />0x000033FF <br />0x00FF00FF <br />0x00CC00FF <br />0x009900FF <br />0x006600FF <br />0x003300FF <br />0x000000FF <br />0x00FFFFCC <br />0x00CCFFCC <br />0x0099FFCC <br />0x0066FFCC <br />0x0033FFCC <br />0x0000FFCC <br />0x00FFCCCC <br />0x00CCCCCC <br />0x0099CCCC <br />0x0066CCCC <br />0x0033CCCC <br />0x0000CCCC <br />0x00FF99CC <br />0x00CC99CC <br />0x009999CC <br />0x006699CC <br />0x003399CC <br />0x000099CC <br />0x00FF66CC <br />0x00CC66CC <br />0x009966CC <br />0x006666CC <br />0x003366CC <br />0x000066CC <br />0x00FF33CC <br />0x00CC33CC <br />0x009933CC <br />0x006633CC <br />0x003333CC <br />0x000033CC <br />0x00FF00CC <br />0x00CC00CC <br />0x009900CC <br />0x006600CC <br />0x003300CC <br />0x000000CC <br />0x00FFFF99 <br />0x00CCFF99 <br />0x0099FF99 <br />0x0066FF99 <br />0x0033FF99 <br />0x0000FF99 <br />0x00FFCC99 <br />0x00CCCC99 <br />0x0099CC99 <br />0x0066CC99 <br />0x0033CC99 <br />0x0000CC99 <br />0x00FF9999 <br />0x00CC9999 <br />0x00999999 <br />0x00669999 <br />0x00339999 <br />0x00009999 <br />0x00FF6699 <br />0x00CC6699 <br />0x00996699 <br />0x00666699 <br />0x00336699 <br />0x00006699 <br />0x00FF3399 <br />0x00CC3399 <br />0x00993399 <br />0x00663399 <br />0x00333399 <br />0x00003399 <br />0x00FF0099 <br />0x00CC0099 <br />0x00990099 <br />0x00660099 <br />0x00330099 <br />0x00000099 <br />0x00FFFF66 <br />0x00CCFF66 <br />0x0099FF66 <br />0x0066FF66 <br />0x0033FF66 <br />0x0000FF66 <br />0x00FFCC66 <br />0x00CCCC66 <br />0x0099CC66 <br />0x0066CC66 <br />0x0033CC66 <br />0x0000CC66 <br />0x00FF9966 <br />0x00CC9966 <br />0x00999966 <br />0x00669966 <br />0x00339966 <br />0x00009966 <br />0x00FF6666 <br />0x00CC6666 <br />0x00996666 <br />0x00666666 <br />0x00336666 <br />0x00006666 <br />0x00FF3366 <br />0x00CC3366 <br />0x00993366 <br />0x00663366 <br />0x00333366 <br />0x00003366 <br />0x00FF0066 <br />0x00CC0066 <br />0x00990066 <br />0x00660066 <br />0x00330066 <br />0x00000066 <br />0x00FFFF33 <br />0x00CCFF33 <br />0x0099FF33 <br />0x0066FF33 <br />0x0033FF33 <br />0x0000FF33 <br />0x00FFCC33 <br />0x00CCCC33 <br />0x0099CC33 <br />0x0066CC33 <br />0x0033CC33 <br />0x0000CC33 <br />0x00FF9933 <br />0x00CC9933 <br />0x00999933 <br />0x00669933 <br />0x00339933 <br />0x00009933 <br />0x00FF6633 <br />0x00CC6633 <br />0x00996633 <br />0x00666633 <br />0x00336633 <br />0x00006633 <br />0x00FF3333 <br />0x00CC3333 <br />0x00993333 <br />0x00663333 <br />0x00333333 <br />0x00003333 <br />0x00FF0033 <br />0x00CC0033 <br />0x00990033 <br />0x00660033 <br />0x00330033 <br />0x00000033 <br />0x00FFFF00 <br />0x00CCFF00 <br />0x0099FF00 <br />0x0066FF00 <br />0x0033FF00 <br />0x0000FF00 <br />0x00FFCC00 <br />0x00CCCC00 <br />0x0099CC00 <br />0x0066CC00 <br />0x0033CC00 <br />0x0000CC00 <br />0x00FF9900 <br />0x00CC9900 <br />0x00999900 <br />0x00669900 <br />0x00339900 <br />0x00009900 <br />0x00FF6600 <br />0x00CC6600 <br />0x00996600 <br />0x00666600 <br />0x00336600 <br />0x00006600 <br />0x00FF3300 <br />0x00CC3300 <br />0x00993300 <br />0x00663300 <br />0x00333300 <br />0x00003300 <br />0x00FF0000 <br />0x00CC0000 <br />0x00990000 <br />0x00660000 <br />0x00330000 <br />0x00000000 <br />0x00EEEEEE <br />0x00DDDDDD <br />0x00BBBBBB <br />0x00AAAAAA <br />0x00888888 <br />0x00777777 <br />0x00555555 <br />0x00444444 <br />0x00222222 <br />0x00111111 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00000000 <br />0x00FFFFFF''' <br /></code> <br />Split and map them into (RR, GG, BB) array <br /><code> <br />palette = [tuple([int(col[i:i+2], 16) for i in range(8,2,-2)]) for col in palette_string.split('\n')] <br /></code> <br />Last night, I lost 3-4 hours figuring if 8-bit is a 8-bit true color. <br />I should have thought about standard palette and google them eariler. <br /> <br />updated <br />======= <br />I just notice the sequence pattern which should make the code shorter. <br /><code> <br />ff00 = range(0xff, -1, -0x33) <br />palette = [(r,g,b) for r in ff00 for g in ff00 for b in ff00] #0x336699 <br />palette[0] = (0,0,0) <br />palette += [(17*i,17*i,17*i) for i in (14,13, 11,10, 8,7, 5,4, 2,1)] # grey <br />palette += [(0,0,0) for i in range(30)] # empty <br />palette[-1] = (255,255,255) <br /></code> Tue, 14 Feb 2006 09:53:58 GMT http://snippets.dzone.com/posts/show/1475 korakot (Korakot Chaovavanich)