97 lines
2.4 KiB
JavaScript
97 lines
2.4 KiB
JavaScript
/**
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This is a jQuery plugin to support resizing text areas.
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Originally based off text area resizer by Ryan O'Dell : http://plugins.jquery.com/misc/textarea.js
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@module $.fn.DivResizer
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**/
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var div, endDrag, grip, lastMousePos, min, mousePosition, originalDivHeight, originalPos, performDrag, startDrag, wrappedEndDrag, wrappedPerformDrag;
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div = void 0;
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originalPos = void 0;
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originalDivHeight = void 0;
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lastMousePos = 0;
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min = 230;
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grip = void 0;
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wrappedEndDrag = void 0;
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wrappedPerformDrag = void 0;
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startDrag = function(e, opts) {
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div = $(e.data.el);
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div.addClass('clear-transitions');
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div.blur();
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lastMousePos = mousePosition(e).y;
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originalPos = lastMousePos;
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originalDivHeight = div.height();
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wrappedPerformDrag = (function() {
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return function(e) {
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return performDrag(e, opts);
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};
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})();
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wrappedEndDrag = (function() {
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return function(e) {
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return endDrag(e, opts);
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};
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})();
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$(document).mousemove(wrappedPerformDrag).mouseup(wrappedEndDrag);
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return false;
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};
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performDrag = function(e, opts) {
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var size, sizePx, thisMousePos;
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thisMousePos = mousePosition(e).y;
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size = originalDivHeight + (originalPos - thisMousePos);
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lastMousePos = thisMousePos;
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var maxHeight = $(window).height();
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if (opts.maxHeight) {
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maxHeight = opts.maxHeight(maxHeight);
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}
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size = Math.min(size, maxHeight);
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size = Math.max(min, size);
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sizePx = size + "px";
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if (typeof opts.onDrag === "function") {
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opts.onDrag(sizePx);
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}
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div.height(sizePx);
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if (size < min) {
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endDrag(e, opts);
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}
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return false;
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};
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endDrag = function(e, opts) {
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$(document).unbind("mousemove", wrappedPerformDrag).unbind("mouseup", wrappedEndDrag);
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div.removeClass('clear-transitions');
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div.focus();
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if (typeof opts.resize === "function") {
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opts.resize();
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}
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div = null;
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};
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mousePosition = function(e) {
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return {
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x: e.clientX + document.documentElement.scrollLeft,
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y: e.clientY + document.documentElement.scrollTop
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};
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};
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$.fn.DivResizer = function(opts) {
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return this.each(function() {
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var grippie, start, staticOffset;
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div = $(this);
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if (div.hasClass("processed")) return;
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div.addClass("processed");
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staticOffset = null;
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start = function() {
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return function(e) {
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return startDrag(e, opts);
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};
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};
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grippie = div.prepend("<div class='grippie'></div>").find('.grippie').bind("mousedown", {
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el: this
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}, start());
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});
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};
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