// ELabel.js 
//
//   This Javascript is provided by Mike Williams
//   Community Church Javascript Team
//   http://www.bisphamchurch.org.uk/   
//   http://econym.org.uk/gmap/
//
//   This work is licenced under a Creative Commons Licence
//   http://creativecommons.org/licenses/by/2.0/uk/
//
// Version 0.2      the .copy() parameters were wrong
// version 1.0      added .show() .hide() .setContents() .setPoint() .setOpacity() .overlap
// version 1.1      Works with GMarkerManager in v2.67, v2.68, v2.69, v2.70 and v2.71
// version 1.2      Works with GMarkerManager in v2.72, v2.73, v2.74 and v2.75
// version 1.3      add .isHidden()
// version 1.4      permit .hide and .show to be used before addOverlay()
// version 1.5      fix positioning bug while label is hidden
// version 1.6      added .supportsHide()
// version 1.7      fix .supportsHide()
// version 1.8      remove the old GMarkerManager support due to clashes with v2.143


function ELabel(point, html, classname, pixelOffset, percentOpacity, overlap) {
    // Mandatory parameters
    this.point = point;
    this.html = html;

    // Optional parameters
    this.classname = classname || "";
    this.pixelOffset = pixelOffset || new GSize(0, 0);
    if (percentOpacity) {
        if (percentOpacity < 0) { percentOpacity = 0; }
        if (percentOpacity > 100) { percentOpacity = 100; }
    }
    this.percentOpacity = percentOpacity;
    this.overlap = overlap || false;
    this.hidden = false;
}

ELabel.prototype = new GOverlay();

ELabel.prototype.initialize = function(map) {
    var div = document.createElement("div");
    div.style.position = "absolute";
    div.innerHTML = '<div class="' + this.classname + '">' + this.html + '</div>';
    map.getPane(G_MAP_FLOAT_SHADOW_PANE).appendChild(div);
    this.map_ = map;
    this.div_ = div;
    if (this.percentOpacity) {
        if (typeof (div.style.filter) == 'string') { div.style.filter = 'alpha(opacity:' + this.percentOpacity + ')'; }
        if (typeof (div.style.KHTMLOpacity) == 'string') { div.style.KHTMLOpacity = this.percentOpacity / 100; }
        if (typeof (div.style.MozOpacity) == 'string') { div.style.MozOpacity = this.percentOpacity / 100; }
        if (typeof (div.style.opacity) == 'string') { div.style.opacity = this.percentOpacity / 100; }
    }
    if (this.overlap) {
        var z = GOverlay.getZIndex(this.point.lat());
        this.div_.style.zIndex = z;
    }
    if (this.hidden) {
        this.hide();
    }
}

ELabel.prototype.remove = function() {
    this.div_.parentNode.removeChild(this.div_);
}

ELabel.prototype.copy = function() {
    return new ELabel(this.point, this.html, this.classname, this.pixelOffset, this.percentOpacity, this.overlap);
}

ELabel.prototype.redraw = function(force) {
    var p = this.map_.fromLatLngToDivPixel(this.point);
    var h = parseInt(this.div_.clientHeight);
    this.div_.style.left = (p.x + this.pixelOffset.width) + "px";
    this.div_.style.top = (p.y + this.pixelOffset.height - h) + "px";
}

ELabel.prototype.show = function() {
    if (this.div_) {
        this.div_.style.display = "";
        this.redraw();
    }
    this.hidden = false;
}

ELabel.prototype.hide = function() {
    if (this.div_) {
        this.div_.style.display = "none";
    }
    this.hidden = true;
}

ELabel.prototype.isHidden = function() {
    return this.hidden;
}

ELabel.prototype.supportsHide = function() {
    return true;
}

ELabel.prototype.setContents = function(html) {
    this.html = html;
    this.div_.innerHTML = '<div class="' + this.classname + '">' + this.html + '</div>';
    this.redraw(true);
}

ELabel.prototype.setPoint = function(point) {
    this.point = point;
    if (this.overlap) {
        var z = GOverlay.getZIndex(this.point.lat());
        this.div_.style.zIndex = z;
    }
    this.redraw(true);
}

ELabel.prototype.setOpacity = function(percentOpacity) {
    if (percentOpacity) {
        if (percentOpacity < 0) { percentOpacity = 0; }
        if (percentOpacity > 100) { percentOpacity = 100; }
    }
    this.percentOpacity = percentOpacity;
    if (this.percentOpacity) {
        if (typeof (this.div_.style.filter) == 'string') { this.div_.style.filter = 'alpha(opacity:' + this.percentOpacity + ')'; }
        if (typeof (this.div_.style.KHTMLOpacity) == 'string') { this.div_.style.KHTMLOpacity = this.percentOpacity / 100; }
        if (typeof (this.div_.style.MozOpacity) == 'string') { this.div_.style.MozOpacity = this.percentOpacity / 100; }
        if (typeof (this.div_.style.opacity) == 'string') { this.div_.style.opacity = this.percentOpacity / 100; }
    }
}

ELabel.prototype.getPoint = function() {
    return this.point;
}
