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Tutorials » Interactivity

Dynamic Pie Chart in Flash 5
Author: Helen Triolo | Website: http://www.i-technica.com |

Adding the Actions

Step 4 : Understanding and Building the Code

The entire code is shown below. If you're creating this movie yourself, you can cut and paste the code from this page into the Frame Actions tab for frame 1 of the movie. In the proceeding pages, I've broken the code to show what's happening.

aCount = new Array(20, 5, 50, 37, 10);
aCategory = new Array("lions", "monkeys", "birds", "elephants", "snakes");
nElements = aCount.length;
aColor = new Array(0x0000cc, 0x669999, 0xcc66cc, 0x00cccc, 0x9933cc);
aPercent = new Array(nElements);
nDepth = 1;
// Calculate total
for (i=0; i < nElements; i++) {
 nTotal += aCount[i];
}
// Calculate percents
for (i=0; i < nElements; i++) {
 aPercent[i] = math.round((aCount[i]/nTotal)*100);
 nTotalPercent += aPercent[i];  // keep for later fix
 if (i < nElements-1) {
 nAllButLast += aPercent[i];	   // keep this for later fix too
 }
}
// if percents don't add to 100 (because of rounding they can be off by 1), fix last percent
if (nTotalPercent != 100) {
 aPercent[nElements-1] = 100 - nAllButLast;
}
// trace(aCount + " " + nTotal + " " + aPercent + " " + nTotalPercent + " " + nAllButLast);
// subtract 1 from first percent because 1 pie slice exists already
aPercent[0] -= 1;
nRunningSum = 0;
for (i=0; i 






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Added: : 2000-12-15

Rating: 7.56 Votes: 76

Hits: 1654





» Author



 Helen Triolo started i-Technica, a web design shop in the Washington DC area, three years ago, after being an apps engineer for a Silicon Valley company and then a programmer for an uncountable number of years.  She's been hooked on Flash since buying a copy last January.



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