Difference between revisions of "Actionscript"

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*[[Actionscript Sandbox]]
 
*[[Actionscript Sandbox]]
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== code hinting suffixes/names==
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to keep in good form you should keep to these common suffixes so that any programmer can read your code easily without finding it utterly incomprehensible.
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variables:
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*must start with letters, underscore or dollarsign.
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*no hyphens or other punctuation besides the underscore.
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*cannot start with a number.
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*are case-insensitive, but keep it constant or you might get confused
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*xxx_str  // means the variable contains a string
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*xxx_arr // means the variable contains an array
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*[http://livedocs.adobe.com/flash/8/main/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Parts&file=00001151.html More about using suffixes to trigger code hints]
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== conditionals ==
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<pre>var message = "yellow";
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trace ("big " + message + " truck");                // prints "big yellow truck"
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if (message == "yellow") {
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trace ("yes, i did say big yellow truck.");        // prints "yes, i did say big yellow truck"
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}</pre>
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<pre>= assigning value
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== comparing values</pre>
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== loops ==
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<table><tr><td valign=top>this sequence... <pre>trace (101);
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trace (102);
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trace (103);
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trace (104);
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trace (105);</pre></td>
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<td valign=top>is equal to:
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<pre>var x = 101;
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trace (x);
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x = x + 1;
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trace (x);
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x = x + 1;
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trace (x);
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x = x + 1;
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trace (x);
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x = x + 1;
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trace (x);</pre></td>
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<td valign=top>is also equal to:
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<pre>var x = 101;
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while (x <= 105) {    // as long as x is less than 105...
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trace (x);
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x = x + 1;          // ...continue to trace x but add one each time
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}</pre></td>
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<td valign=top>they all print:
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<pre>101
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102
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103
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104
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105</pre></td></tr></table>
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== functions ==
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sample:
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<pre>function area(height, width){
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return height * width;
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}
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area1 = area(10,15);
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area2 = area(10,20);
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area3 = area(10,20);
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</pre>
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== event based execution ==
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<pre>someObject.onSomeEvent = someFunction;</pre>
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for example:
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<pre>skaGirl.onRelease = dirtyskanking;            // the object named skaGirl will dirtyskank when mouse is released
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function dirtyskanking () {
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this._parent._rotation = 360;                    // defines the rotation of the dirtyskanking.
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}
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</pre>
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== sample ==
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=== quiz ===
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<pre>
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button1.onRelease = function () {        // on pressing button 1
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this._parent.q1answer = 1;                // assigning 1 to q1 answer
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this._parent.gotoAndStop("q2")            // after which we go to frame labelled as q2
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}
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if (q1answer == 3) {                      //  if answer was right
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  totalCorrect = totalCorrect++;          //  increase number of total correct qns by one
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}
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</pre>
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== confused about root, this, and parent? so am i! ==
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this piece of code would work ON a frame on the main stage, one_mc being an object onnit.
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<pre>function T1over() {
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_root.one_mc.gotoAndStop(2);
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getURL('javascript:modifyT1();');
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}
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_root.one_mc.onRollOver = T1over;</pre>
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== actionscript and javascript ==
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*[http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_15683 flash to/from javascript call]
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*[http://board.flashkit.com/board/archive/index.php/t-578023.html halp i am so confused]
  
 
== tips ==
 
== tips ==

Revision as of 16:46, 17 June 2008

actionscript, that infuriatingly intractable marshmellow fluff... so far i have only understood the most basic of concepts, but now i will try to learn it well.


code hinting suffixes/names

to keep in good form you should keep to these common suffixes so that any programmer can read your code easily without finding it utterly incomprehensible.

variables:

  • must start with letters, underscore or dollarsign.
  • no hyphens or other punctuation besides the underscore.
  • cannot start with a number.
  • are case-insensitive, but keep it constant or you might get confused
  • xxx_str // means the variable contains a string
  • xxx_arr // means the variable contains an array

conditionals

var message = "yellow";
trace ("big " + message + " truck");                // prints "big yellow truck"
if (message == "yellow") {
trace ("yes, i did say big yellow truck.");        // prints "yes, i did say big yellow truck"
}
= assigning value
== comparing values

loops

this sequence... 
trace (101);
trace (102);
trace (103);
trace (104);
trace (105);
 is equal to: 
var x = 101;
trace (x);
x = x + 1;
trace (x);
x = x + 1;
trace (x);
x = x + 1;
trace (x);
x = x + 1;
trace (x);
 is also equal to: 
var x = 101;
while (x <= 105) {     // as long as x is less than 105...
trace (x);
x = x + 1;           // ...continue to trace x but add one each time
}
 they all print: 
101
102
103
104
105

functions

sample: 

function area(height, width){
return height * width;
}
area1 = area(10,15);
area2 = area(10,20);
area3 = area(10,20);

event based execution

someObject.onSomeEvent = someFunction;

for example: 

skaGirl.onRelease = dirtyskanking;            // the object named skaGirl will dirtyskank when mouse is released

function dirtyskanking () {
this._parent._rotation = 360;                     // defines the rotation of the dirtyskanking.
}

sample

quiz

button1.onRelease = function () {         // on pressing button 1
this._parent.q1answer = 1;                // assigning 1 to q1 answer
this._parent.gotoAndStop("q2")            // after which we go to frame labelled as q2
}

if (q1answer == 3) {                      //  if answer was right
  totalCorrect = totalCorrect++;          //  increase number of total correct qns by one
}

confused about root, this, and parent? so am i!

this piece of code would work ON a frame on the main stage, one_mc being an object onnit. 

function T1over() {
	_root.one_mc.gotoAndStop(2);
	getURL('javascript:modifyT1();');
}

_root.one_mc.onRollOver = T1over;

actionscript and javascript

tips

  • use frame labels rather than frame numbers. you could call a starting frame "init".
  • dont use too many functions

See Also

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