resizepanel.js

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YAHOO.widget.ResizePanel = function(el, userConfig) {
    if (arguments.length > 0) {
        YAHOO.widget.ResizePanel.superclass.constructor.call(this, el, userConfig);
    }
}

YAHOO.extend(YAHOO.widget.ResizePanel, YAHOO.widget.Panel);

YAHOO.widget.ResizePanel.prototype.init = function(el, userConfig) {
    YAHOO.widget.ResizePanel.superclass.init.call(this, el/*, userConfig*/);  // Note that we don't pass the user config in here yet because we only want it executed once, at the lowest subclass level

    this.beforeInitEvent.fire(YAHOO.widget.ResizePanel);

    this.resizeHandle = document.createElement("DIV");
    this.resizeHandle.id = this.id + "_r";

    this.resizeHandle.style.position = "absolute";
    this.resizeHandle.style.width = "25px";
    this.resizeHandle.style.height = "4px";
    this.resizeHandle.style.right = "0";
    this.resizeHandle.style.bottom = "0";
    this.resizeHandle.style.padding = "0";
    this.resizeHandle.style.margin = "0";
    this.resizeHandle.style.zIndex = "1";

    this.resizeHandle.style.backgroundColor = "#666";
    this.resizeHandle.style.cursor = "se-resize";
    this.resizeHandle.style.fontSize = "2px";

    this.beforeRenderEvent.subscribe(function() {
        if (! this.footer) {
            this.setFooter("");
        }
    },
            this, true
            );
    this.renderEvent.subscribe(function() {
        var me = this;

        me.innerElement.appendChild(me.resizeHandle);

        this.ddResize = new YAHOO.util.DragDrop(this.resizeHandle.id, this.id);
        this.ddResize.setHandleElId(this.resizeHandle.id);

        var headerHeight = me.header.offsetHeight;

        this.ddResize.onMouseDown = function(e) {

            this.startWidth = me.innerElement.offsetWidth;
            this.startHeight = me.innerElement.offsetHeight;

            me.cfg.setProperty("width", this.startWidth + "px");
            me.cfg.setProperty("height", this.startHeight + "px");

            this.startPos = [YAHOO.util.Event.getPageX(e),
                    YAHOO.util.Event.getPageY(e)];

            me.innerElement.style.overflow = "hidden";
            me.body.style.overflow = "auto";
        }

        this.ddResize.onDrag = function(e) {
            var newPos = [YAHOO.util.Event.getPageX(e),
                    YAHOO.util.Event.getPageY(e)];

            var offsetX = newPos[0] - this.startPos[0];
            var offsetY = newPos[1] - this.startPos[1];

            var newWidth = Math.max(this.startWidth + offsetX, 10);
            var newHeight = Math.max(this.startHeight + offsetY, 10);

            me.cfg.setProperty("width", newWidth + "px");
            me.cfg.setProperty("height", newHeight + "px");

            var bodyHeight = (newHeight - 5 - me.footer.offsetHeight - me.header.offsetHeight - 3);
            if (bodyHeight < 0) {
                bodyHeight = 0;
            }

            me.body.style.height =  bodyHeight + "px";

            var innerHeight = me.innerElement.offsetHeight;
            var innerWidth = me.innerElement.offsetWidth;

            if (innerHeight < headerHeight) {
                me.innerElement.style.height = headerHeight + "px";
            }

            if (innerWidth < 20) {
                me.innerElement.style.width = "20px";
            }
        }

    }, this, true);

    if (userConfig) {
        this.cfg.applyConfig(userConfig, true);
    }

    this.initEvent.fire(YAHOO.widget.ResizePanel);
}

YAHOO.widget.ResizePanel.prototype.toString = function() {
    return "ResizePanel " + this.id;
}