Scrolling Question?

Question

any solution for this...this is combobox compenent.any solution?

kglad · Accepted Answer

The result i get from this coding. The scroll Bar start from bottom and scrollpane cannot scrolling.

I was test on mobile phone.

coding i use:

var m:Number;

var b:Number;

combobox.addEventListener(MouseEvent.MOUSE_DOWN, startscrollF);

function startscrollF(event:MouseEvent):void {

paramF(combobox.mouseY,combobox.dropdown.verticalScrollPosition,combobox.height-10,combobox.dropdown.maxVerticalScrollPosition);

this.addEventListener(Event.ENTER_FRAME,scrollF);

this.addEventListener(MouseEvent.MOUSE_UP,stopscrollF);

}

function scrollF(e:Event):void{

combobox.dropdown.verticalScrollPosition=Math.round(Math.min(combobox.mouseY *m+b,combobox.dropdown.maxVerticalScrollPosition));

}

function stopscrollF(e:Event):void{

this.removeEventListener(Event.ENTER_FRAME,scrollF);

}

function paramF(x1:Number,y1:Number,x2:Number,y2:Number):void{

m=(y1-y2)/(x1-x2);

b=m*x1-y1;

}

use;

var m: Number;

var b: Number;

combo_box.addEventListener(MouseEvent.MOUSE_DOWN, startscrollF);

function startscrollF(event: MouseEvent): void {

paramF(combo_box.mouseY, combo_box.dropdown.verticalScrollPosition, combo_box.dropdown.height - 10, combo_box.dropdown.maxVerticalScrollPosition);

this.addEventListener(Event.ENTER_FRAME, scrollF);

stage.addEventListener(MouseEvent.MOUSE_UP, stopscrollF);

}

function scrollF(e: Event): void {

combo_box.dropdown.verticalScrollPosition = Math.round(Math.min(combo_box.dropdown.mouseY * m + b, combo_box.dropdown.maxVerticalScrollPosition));

}

function stopscrollF(e: Event): void {

this.removeEventListener(Event.ENTER_FRAME, scrollF);

}

function paramF(x1: Number, y1: Number, x2: Number, y2: Number): void {

m = (y1 - y2) / (x1 - x2);

b = m * x1 - y1;

}

AngryGamerProductions · Answer

Try this: When a user puts their finger on the list to start scrolling, have a variable track where they put their finger down, and have a timer update the CB's scroll amount by how much they have moved their finger from the original area where they put it down.

An example of a code to go along with this is:

var start_finger_position:Number 
combo_box.addEventListener(MouseEvent.MOUSE_OVER, fl_hover);
function fl_hover(event:MouseEvent):void 
{
    start_finger_position = mouseY
}
//insert timer listener and function here
//timer code:
{
combo_box.verticalScrollbar.scroll = combo_box.verticalScrollbar.scroll + (mouseY - start_finger_position)
}

(The timer updates the scroll, so have an interval of about 10-50)

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