DZone Snippets: draw code

Drawing a single Polyline using SVG

jrobertson (James Robertson) — Sat, 22 Mar 2008 19:15:43 GMT

This code is very similar to Draw a series of lines using SVG [dzone.com] but now we can draw a series of points at the same time the mouse button is pressed and is moving. Here's an example of the SVG squiggle output [twitxr.com].



		xmlns:xlink="http://www.w3.org/1999/xlink" >

  



    y="0" width="100%" height="100%" fill="yellow" />

  



  



  Click something to move it

  Click nothing to add something

*update 7:44pm*
By simply making the id unique using a global variable count it was possible to draw multiple polylines [twitxr.com].

Actionscript Draw Box

bgidge (Bryan Gidge) — Sat, 27 Jan 2007 03:00:29 GMT

Function to draw a box with a specified width, height, and color, and return the box MovieClip



function draw_box(w,h,c){

	var new_box = this.createEmptyMovieClip("new_box", this.getNextDepth());

	new_box.beginFill(c);

	new_box.lineStyle(0,0x000000,0);

	new_box.moveTo(0, 0);

	new_box.lineTo(w, 0);

	new_box.lineTo(w, h);

	new_box.lineTo(0, h);

	new_box.lineTo(0, 0);

	new_box.endFill();

	return new_box;

}

Sample function call draws a 200w x 25h pixel, black box:



draw_box(200,25,0x000000);

Allegro Dibujos de posicion relativa

jcongote (John Edgar Congote Calle) — Fri, 22 Sep 2006 20:09:54 GMT

Dibujos en allegro dependiendo de la posicion del mouse



#include 





void  dibujo(int x,int y){

      circle (screen, x+100,y+100,100,makecol(128,0,0));

      circlefill (screen,x+50,y+50,20,makecol(0,255,0));

      circlefill (screen,x+150,y+50,20,makecol(0,255,0));

      rect (screen,x+80,y+100,x+120,y+150,makecol(0,0,128));

      line (screen,x+50,y+180,x+150,y+180,makecol(128,128,0));

}



void init();

void deinit();





int main() {

	init();

	show_mouse(screen);

	while (!key[KEY_ESC]) {  

          clear_to_color(screen,0);

          dibujo(mouse_x,mouse_y);

	}



	deinit();

	return 0;

}

END_OF_MAIN();



void init() {

	int depth, res;

	allegro_init();

	depth = desktop_color_depth();

	if (depth == 0) depth = 32;

	set_color_depth(depth);

	res = set_gfx_mode(GFX_AUTODETECT_WINDOWED, 640, 480, 0, 0);

	if (res != 0) {

		allegro_message(allegro_error);

		exit(-1);

	}



	install_timer();

	install_keyboard();

	install_mouse();

	/* add other initializations here */

}



void deinit() {

	clear_keybuf();

	/* add other deinitializations here */

}

Sparkline: from PIL to S60

korakot (Korakot Chaovavanich) — Sun, 26 Jun 2005 13:50:12 GMT

py_s60 1.1.3 has its drawing API very similar to PIL.
Porting from PIL to S60 is very easy. Here's an example
that I port a sparkline drawing function from
Joe Gregorio's article at xml.com



# modified from  Joe Gregorio's article at

# http://www.xml.com/pub/a/2005/06/22/sparklines.html



from appuifw import *

import e32



lock = e32.Ao_lock()

c = Canvas()

app.body = c

draw = c._draw



red, green, blue, gray = 0xff0000, 0x00ff00, 0x0000ff, 0x777777



def plot_sparkline(results, step=2, height=20, \

    min_m=None, max_m=None, last_m=None, \

    min_color=blue, max_color=green, last_color=red):

    coords = zip(range(1,len(results)*step+1, step), \

       [height - 3  - y/(101.0/(height-4)) for y in results])

    draw.line(coords, gray)

    if min_m:

        min_pt = coords[results.index(min(results))]

        draw.rectangle([min_pt[0]-1, min_pt[1]-1, min_pt[0]+1, min_pt[1]+1], fill=min_color)

    if max_m:

        max_pt = coords[results.index(max(results))]

        draw.rectangle([max_pt[0]-1, max_pt[1]-1, max_pt[0]+1, max_pt[1]+1], fill=max_color)

    if last_m:

        end = coords[-1]

        draw.rectangle([end[0]-1, end[1]-1, end[0]+1, end[1]+1], fill=last_color)





results = [88,84,82,92,82,86,66,82,44,64,66,88,96,80,24,26, \

        14,0,0,26,8,6,6,24,52,66,36,6,10,14,30]

plot_sparkline(results, 3, 30, min_m=1, max_m=1, last_m=1)



app.exit_key_handler = lock.signal

lock.wait()