Hi guys
quick question really.
I have a Scrollbar class with a public method, arrowPressed
(e:MouseEvent), that i'm trying to call from another class,
TimelineArea(), using objects with the same name with the lines:
left_arrow.addEventListener( MouseEvent.MOUSE_DOWN,
scrollbar.arrowPressed );
right_arrow.addEventListener( MouseEvent.MOUSE_DOWN,
scrollbar.arrowPressed );
// note scrollbar is an instance of the Scrollbar class
the method in the Scrollbar class is as follows:
public function arrowPressed( e:MouseEvent ):void
{
var dir:int = (e.target == left_arrow) ? -1 : 1;
var total:Number = slider.percent + (dir * scrollSpeed);
Tweener.addTween(slider,{percent:total, time:0.5}); // Tweener tween
added to add friction to arrow presses - God bless Zeh and chums!
}
The result of this is that both left_arrow and right_arrow in the
TimelineArea class give a (e.target == left_arrow) = false result and
only move the timeline forward whereas the left_arrow and right_arrow
within the Scrollbar class give the correct result: right_arrow =
false (moves the timeline +1), left_arrow = true (moves the timeline -1)
why would using the public method externally pass a different result
to using it internally, please?
I've included both classes below for context
thanks for your time
a
Scrollbar Class
[CODE]
package
{
import flash.display.Sprite;
import flash.events.MouseEvent;
import com.caurina.transitions.*;
public class Scrollbar extends Sprite
{
// elements
protected var slider:Slider;
protected var left_arrow:Sprite;
protected var right_arrow:Sprite;
protected var scrollSpeed:Number = .02;
// read/write percentage value relates directly to the slider
public function get percent():Number { return slider.percent; }
public function set percent( p:Number ):void
{ slider.percent = p; }
public function Scrollbar()
{
createElements();
}
// executes when the up arrow is pressed
public function arrowPressed( e:MouseEvent ):void
{
var dir:int = (e.target == left_arrow) ? -1 : 1;
var total:Number = slider.percent + (dir * scrollSpeed);
Tweener.addTween(slider,{percent:total, time:0.5}); // Tweener
tween added to add friction to arrow presses - God bless Zeh and chums!
}
protected function createElements():void
{
slider = new Slider();
left_arrow = new Sprite();
left_arrow.graphics.beginFill( 0x999999, 1 );
left_arrow.graphics.moveTo(20,0);
left_arrow.graphics.lineTo(20,40);
left_arrow.graphics.lineTo(10,40);
left_arrow.graphics.curveTo(0,40,0,30);
left_arrow.graphics.lineTo(0,10);
left_arrow.graphics.curveTo(0,0,10,0);
left_arrow.graphics.lineTo(20,0);
left_arrow.graphics.endFill();
right_arrow = new Sprite();
right_arrow.graphics.beginFill( 0x999999, 1 );
right_arrow.graphics.lineTo(10,0);
right_arrow.graphics.curveTo(20,0,20,10);
right_arrow.graphics.lineTo(20,30);
right_arrow.graphics.curveTo(20,40,10,40);
right_arrow.graphics.lineTo(0,40);
right_arrow.graphics.lineTo(0,0);
right_arrow.graphics.endFill();
slider.x = left_arrow.width;
right_arrow.x = slider.x + slider.width;
left_arrow.addEventListener( MouseEvent.MOUSE_DOWN,
arrowPressed );
right_arrow.addEventListener( MouseEvent.MOUSE_DOWN,
arrowPressed );
addChild( slider );
addChild( left_arrow );
addChild( right_arrow );
}
public override function addEventListener( type:String,
listener:Function, useCapture:Boolean=false, priority:int=0,
useWeakReference:Boolean=false ):void
{
if ( type === SliderEvent.CHANGE )
{
slider.addEventListener( SliderEvent.CHANGE,
listener, useCapture, priority, useWeakReference );
return;
}
super.addEventListener( type, listener, useCapture,
priority, useWeakReference );
}
public override function removeEventListener( type:String,
listener:Function, useCapture:Boolean=false ):void
{
if ( type === SliderEvent.CHANGE )
{
slider.removeEventListener( SliderEvent.CHANGE,
listener, useCapture );
return;
}
super.removeEventListener( type, listener, useCapture );
}
}
}
[/CODE]
TimelineArea Class (cut down for readability and relevance)
[CODE]
package
{
//package imports
import flash.display.Sprite;
//scrollbar imports
import com.caurina.transitions.*;
import flash.geom.*;
import flash.events.*;
import com.receptacle.utils.*; // includes SimpleRectangle and
SimpleTextField
internal class TimelineArea extends Sprite
{
// class variable declarations
private var cp:CommonProperties;
private var taTitleBarY;
private var taPanelY:uint;
private var taPanelHeight:uint
private var scrollableBase:Sprite;
private var scrollbar:Scrollbar
private var stage_width:uint;
private var stage_height:uint;
private var yearDistance:uint;
private var startYear:int;
private var endYear:int;
private var yearDiv:uint;
private var panelY:uint;
private var panelColour:uint;
private var taTitleBarHeight:uint;
private var nonScrollableBase:Sprite;
private var commonGrey:uint;
private var subheadingFont:String;
private var headingFont:String;
// constructor
public function TimelineArea():void
{
setVars();
initialiseTimelineScrollBar();
addTimelineAreaNavigation();
}
private function setVars()
{
scrollbar = new Scrollbar();
cp = new CommonProperties();
stage_width = cp.stage_width;
stage_height = cp.stage_height;
taTitleBarHeight = cp.taTitleBarHeight;
taTitleBarY = cp.taTitleBarY;
taPanelY = cp.taPanelY;
taPanelHeight = cp.taPanelHeight;
commonGrey = cp.tickColour;
headingFont = cp.headingFont;
subheadingFont = cp.subheadingFont;
yearDistance = cp.yearDistance;
startYear = cp.startYear;
endYear = cp.endYear;
yearDiv = cp.yearDiv;
scrollbar.x = 16;
scrollbar.y = 550-cp.titleBarHeight;
scrollableBase = new Sprite();
nonScrollableBase = new Sprite();
scrollableBase.y = 0;
addChild(scrollableBase);
addChild(nonScrollableBase);
}
private function initialiseTimelineScrollBar():void
{
trace ("Timeline scrollbar initialised");
var scroll_rect:Rectangle = new Rectangle( 0, 0, stage_width,
taPanelHeight+taTitleBarHeight+30 );
var sc:ScrollContent = new ScrollContent( scrollableBase,
scrollbar, scroll_rect );
addChild( scrollbar );
}
private function addTimelineAreaNavigation():void
{
var left_arrow:SimpleRectangle = new SimpleRectangle(0x000000,
0x000000, 0, 0, stage_width/3, taPanelHeight + taTitleBarHeight);
var right_arrow:SimpleRectangle = new SimpleRectangle(0x000000,
0x000000, (stage_width/3)*2, 0, stage_width/3, taPanelHeight +
taTitleBarHeight);
left_arrow.alpha = 0;
right_arrow.alpha = 0;
left_arrow.addEventListener( MouseEvent.MOUSE_DOWN,
scrollbar.arrowPressed );
right_arrow.addEventListener( MouseEvent.MOUSE_DOWN,
scrollbar.arrowPressed );
addChild(left_arrow);
addChild(right_arrow);
}
}
}
[/CODE]
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