01/08/09
XML driven flash components
30/07/09
Create data graph on the fly
Generating graph from data collected on the internet and shows it on the web can be very useful.
I found 2 ways to create data graph/chart on the fly:
1. Use the google api
http://code.google.com/apis/chart/basics.html
To create a simple pie chart, all you need is one line of html
XML: | <img src="http://chart.apis.google.com/chart?chs=350x100&chd=t:60,40&cht=p3&chl=Web_designers|Programmers" alt="Sample chart" /> |
And you will have
2. Use php + GD Library
to create the same chart you need the following codes. Codes are based on
http://www.talkphp.com/advanced-php-programming/2508-3d-pie-charts-php-gd.html
with small changes
PHP: | $image = imagecreatetruecolor(300, 300); |
| |
| $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF); |
| $gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0); |
| $darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90); |
| $navy = imagecolorallocate($image, 0x00, 0x00, 0x80); |
| $darknavy = imagecolorallocate($image, 0x00, 0x00, 0x50); |
| $red = imagecolorallocate($image, 0xFF, 0x00, 0x00); |
| $darkred = imagecolorallocate($image, 0x90, 0x00, 0x00); |
| |
| |
| imageFill($image, 0, 0, $white); |
| imageColorTransparent($image, $white); |
| |
| |
| for ($i = 160; $i > 150; $i--) { |
| imagefilledarc($image, 150, $i, 200, 100, 0, 45, $darknavy, IMG_ARC_PIE); |
| imagefilledarc($image, 150, $i, 200, 100, 45, 75 , $darkgray, IMG_ARC_PIE); |
| imagefilledarc($image, 150, $i, 200, 100, 75, 360 , $darkred, IMG_ARC_PIE); |
| } |
| |
| imagefilledarc($image, 150, 150, 200, 100, 0, 45, $navy, IMG_ARC_PIE); |
| imagefilledarc($image, 150, 150, 200, 100, 45, 75 , $gray, IMG_ARC_PIE); |
| imagefilledarc($image, 150, 150, 200, 100, 75, 360 , $red, IMG_ARC_PIE); |
| |
| |
| header('Content-type: image/png'); |
| imagepng($image); |
| imagedestroy($image); |
If you need to know more about using GD Lib to create graph on the web, please visit a tutorial at
http://php.about.com/od/advancedphp/ss/gd_library_6.htm
You need to be careful when you are using server side script to generate graph as it is CPU intensive.
 29/07/09
Windows Small Business Server (SBS)'s backup disconnect remote desktop
I don’t anyone of you know why this could happen:
A Windows SBS 2003 would disconnect a remote desktop session when it starts its backup. The default windows backup verifies the backup copy and it takes forever. I have to edit the executive file to stop the verification following this guide:
http://www.slickit.ca/2009/05/turn-verify-off-sbs-2003-backup.html
This allows me to re-schedual backup to starts later at night so people can do their work at the early evenings. But this just avoids the problem.
Please let me know if you any idea …
Are you are web design agent?
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WE will provide a strong portfolio if required.
Have a good day!
Javascript form validator script
I have been using the a javascript from
http://www.javascript-coder.com/html-form/javascript-form-validation.phtml
for awhile and I totally like it. It’s very easy to use in order to validate the web form. What’s more, it is very easy to extend.
Here is how to extend the script so that it can find out if a user input the right confirm email address or not.
Code: | function confirmEmail () |
| { |
| var frm = document.forms["custForm"]; |
| if(frm.email.value != frm.confirm_email.value) |
| { |
| sfm_show_error_msg("Confirm email does not match "); |
| return false; |
| } |
| else |
| { |
| return true; |
| } |
| } |
| |
| frmvalidator.setAddnlValidationFunction("confirmEmail"); |
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