Difference between revisions of "Actionscript 2 Sandbox"

Revision as of 16:13, 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"
trace (typeof message);                         // prints "string"
var x = a;                                      // prints "number"
trace (typeof a)
}

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
}


        /* 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
}                                         //    you could even do something like
                                          //    if ( 3 < 300 ) { do something }
                                          //    if ( "a" < "z" ) { do something }
                                          //

        /* 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) {                                 // this placed on one_mc
        gotoAndStop(2);                         // is the same as above
        getURL('javascript:modifyT1();');       // OPTIONALLY use frame labels instead of frame no.
}

        /*  ROTATION  */
        
on (rollOver) {
        this._rotation = + 45;          // Values from 0 to 180 represent clockwise rotation;
}                                       // values from 0 to -180 represent counterclockwise rotation


        /* LOADING IMAGES IN */
        
this.createEmptyMovieClip("image_mc", 1);       // to create a dynamically created mc
image_mc.loadMovie("giraffe.jpg");              // mc loads an image

image_mc.removeMovieClip();                     // to remove the dynamically created mc


        /* CREATING TEXT FIELDS */
        
var score = 99;
this.createTextField("score_txt", 1, 150, 200, 200, 20);
score_txt.text = "  "+score+" points";  // prints 99 points in score_txt field
score_txt.textColor = 0xFF0000;                        // text color is red

                                // myMovieClip.createTextField (instanceName,depth,x,y,width,height)
                                //        instanceName  A string that identifies the instance name of the new text field.
                                //        x An integer that specifies the x coordinate of the new text field.
                                //        y An integer that specifies the y coordinate of the new text field.
                                
myFormat.underline  = true;
myFormat.Color = 0xFF0000;                  // alternatively, score_txt.textColor also works
myFormat.bold = true;
myFormat.size = 16;
myFormat.font = "Georgia";                  // if you choose to set a font, make sure you include dummy field offstage
                                            // which uses your font, has font embedding turned on (character)
                                            // and if you use bold/italic/regular variation you must include each type
                                            
score_txt.setTextFormat(myFormat);          // applies format to all of score_txt
score_txt.setTextFormat(12, 27, myFormat);  // applies format to only the 12-27th character in score_txt. HARDCORE....


this.createTextField("more_txt", 1, 180, 250, 200, 20);
more_txt.html = true;                                           // creating a dynamic (highlightable) txtfield
more_txt.htmlText = "look its a
<font color='#00ccff'><u>                                       // you will have to format it all in html
<a href='http://www.sg'>link</a>
</u></font>";

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
• halp i am so confused