User Guide

on mouseEnter 183
on mouseEnter
Usage
-- Lingo syntax
on mouseEnter
statement(s)
end
// JavaScript syntax
function mouseEnter() {
statement(s);
}
Description
System message and event handler; contains statements that run when the mouse pointer first
contacts the active area of the sprite. The mouse button does not have to be pressed.
If the sprite is a bitmap cast member with matte ink applied, the active area is the portion of the
image that is displayed; otherwise, the active area is the sprite’s bounding rectangle.
If used in a behavior, this event is passed the sprite script or frame script reference
me.
Example
This example is a simple button behavior that switches the bitmap of the button when the mouse
rolls over and then off the button:
-- Lingo syntax
property spriteNum
on mouseEnter me
-- Determine current cast member and switch to next in cast
currentMember = sprite(spriteNum).member.number
sprite(spriteNum).member = currentMember + 1
end
on mouseLeave me
-- Determine current cast member and switch to previous in cast
currentMember = sprite(spriteNum).member.number
sprite(spriteNum).member = currentMember - 1
end
// JavaScript syntax
var spriteNum;
function mouseEnter() {
// Determine current cast member and switch to next in cast
currentMember = sprite(spriteNum).member.number;
sprite(spriteNum).member = currentMember + 1;
}
function mouseLeave() {
// Determine current cast member and switch to previous in cast
currentMember = sprite(spriteNum).member.number;
sprite(spriteNum).member = currentMember - 1;
}
See also
on mouseLeave, on mouseWithin