ImageMapster を使用して 3 つの状態を追跡する例を次に示します。
http://jsfiddle.net/jamietre/GjxCk/
基本的なトリックは、各領域の状態を自分で追跡し、ImageMapster に何をすべきかを指示することです。これはコードです:
var map = $('#map'),
// a object map for tracking the state of each area
selStates = {},
// rendering options for the 1st selected state
selected1opts = {
fillColor: '00ff00',
stroke: true,
strokeColor: '000000',
strokeWidth: 2
},
// rendering options for the 2nd selected state
selected2opts = {
fillColor: 'ff0000',
stroke: true,
strokeColor: '00ff00',
strokeWidth: 1
};
// make an array from the different states' rendering options so we can easily
// choose one
var renderOpts = [selected1opts, selected2opts];
function onClick(data) {
// get current state (0,1,2) -- default to zero which means unset
var cur = selStates[data.key] || 0,
next = (cur + 1) % 3;
// always unset: if state 0, this is all we need to do. if state
// 2, we have to unset first, since setting the state for an area
// that's already selected will do nothing. If it happens to be going from
// 0 to 1, then no harm done.
map.mapster('set', false, data.key);
if (next) {
// now set the area state using the correct options
map.mapster('set', true, data.key, renderOpts[cur]);
}
// update local store with current state
// add 1, and apply a modulus of 3 to get new state
selStates[data.key] = next;
}
map.mapster({
mapKey: 'state',
// setting isSelectable=false will prevent imagemapster from using its own click-select
// handling. You could also return false from the onClick event to stop internal handling
isSelectable: false,
// bind our "onClick" function above to handle area clicks
onClick: onClick
});