Difference between revisions of "Actionscript 2 Sandbox"

Revision as of 14:20, 17 June 2008

the readable stuff is at the Actionscript page, the sandbox is the-messing-around-with-snippets-section.

#include "filename.as"          // includes the .as file at runtime (must be in same folder as .fla)


/*
CONDITIONALS
*/

var message = "yellow";                         // the equal sign assigns values to variables
trace ("big " + message + " truck");            // prints "big yellow truck"
if (message == "yellow") {                      // the double equal sign checks to see if variables are equal
trace ("yes, i did say big yellow truck.");     // prints "yes, i did say big yellow truck"
}

/*
BUTTONS IN A 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
}

/*
FUNCTIONS IN DIFFERENT LAYERS/SCENES
*/

function T1over() {                             // this code is placed on main stage
        _root.one_mc.gotoAndStop(2);            // but refers to a one_mc on the stage
        getURL('javascript:modifyT1();');
}


_root.one_mc.onRollOver = T1over;               // this would be same

on (rollOver) {
        gotoAndStop(2);
        getURL('javascript:modifyT1();');
}

var x = 1;
while (x <= 5) {                // as long as x is less than 5...
trace (x);                      // return 1 in output
x = x + 1;                      // return 2 3 4 5 in output
}

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

• More about using suffixes to trigger code hints

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

trace (101);
trace (102);
trace (103);
trace (104);
trace (105);

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);

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
}

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

• flash to/from javascript call