Need an Mc to always stay on screen

[nmuta]

I have a very tall Flash application that I will be using as part of a Help Desk application .

The document is 1500 pixels tall. There is a little "control panel" on the right hand side of the screen that always needs to stay on screen , no matter how far down you scroll. The scroll panel is 510 pixels tall, and the registration point is toward the top/middle.

I have the code set so that now, if the mouse gets too far away from the panel, the control panel will travel down (or up) to find the mouse y position. But its a little choppy and sometimes you have to move the mouse to the extreme top or bottom of the screen to get it to position itself properly.

code:

---

_root.multiplier=60;

_root.pccount=103;

_root.dragmode=false;



function movepane(){



	panely=_root.controlpanel._y

	mousey=_root._ymouse;

	if (mousey>panely+400){

		_root.controlpanel._y=_root.controlpanel._y+multip  lier;

		multiplier= multiplier*0.99;

		

	}else if (mousey<panely-100){

		_root.controlpanel._y=_root.controlpanel._y-multiplier;

		multiplier= multiplier*0.99;

	}else{

		multiplier=60;

	}//end if mousey

	



}

---

Here is the link: try it out.


http://www.newmediatech.net/nuSite/helpdesk3.html

[jbum]

Figure out the minimum and maximum Y values that the control panel should be allowed to have. Let's say it's 0 and 1000.

MINIMUM_Y = 0;
MAXIMUM_Y = 1000;

Then change these two lines:

if (mousey>panely+400){
...
}else if (mousey<panely-100){

to this:

if (mousey>panely+400 and _root.controlpanel._y < MAXIMUM_Y){
...
}else if (mousey<panely-100 and _root.controlpanel._y > MINIMUM_Y){

[nmuta]

thanks! I didn't think about using a minimum and maximum y value. It's still stopping too soon in both directions, but I can work with it based on what you've said. I need to figure out how to change the registration point on the mc, that will help me get the measurements more precise.

[jbum]

Yep. Having a precise registration point always makes scripting easier.

For example, if the registration point is at the top of the MC, than the maximum _y is going to be

Stage.height - mc._height;

If the registration point is at the exact center of the MC, then maximum _y is going to be

Stage.height - mc._height/2;

But if the registration point is "near" the top or center, then all bets are off

I often use the properties panel to move content to insure that the registration point is exactly centered. If a movie is 140 pixels high, I will manually set the y position to -70.