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299 lines
7.7 KiB
299 lines
7.7 KiB
/**
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* @constructor ItemBox
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* @extends Item
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* @param {ItemSet} parent
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* @param {Object} data Object containing parameters start
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* content, className.
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* @param {Object} [options] Options to set initial property values
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* @param {Object} [defaultOptions] default options
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* // TODO: describe available options
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*/
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function ItemBox (parent, data, options, defaultOptions) {
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this.props = {
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dot: {
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left: 0,
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top: 0,
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width: 0,
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height: 0
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},
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line: {
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top: 0,
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left: 0,
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width: 0,
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height: 0
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}
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};
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Item.call(this, parent, data, options, defaultOptions);
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}
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ItemBox.prototype = new Item (null, null);
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/**
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* Repaint the item
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* @return {Boolean} changed
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*/
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ItemBox.prototype.repaint = function repaint() {
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// TODO: make an efficient repaint
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var changed = false;
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var dom = this.dom;
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if (!dom) {
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this._create();
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dom = this.dom;
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changed = true;
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}
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if (dom) {
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if (!this.parent) {
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throw new Error('Cannot repaint item: no parent attached');
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}
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if (!dom.box.parentNode) {
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var foreground = this.parent.getForeground();
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if (!foreground) {
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throw new Error('Cannot repaint time axis: ' +
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'parent has no foreground container element');
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}
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foreground.appendChild(dom.box);
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changed = true;
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}
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if (!dom.line.parentNode) {
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var background = this.parent.getBackground();
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if (!background) {
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throw new Error('Cannot repaint time axis: ' +
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'parent has no background container element');
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}
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background.appendChild(dom.line);
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changed = true;
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}
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if (!dom.dot.parentNode) {
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var axis = this.parent.getAxis();
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if (!background) {
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throw new Error('Cannot repaint time axis: ' +
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'parent has no axis container element');
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}
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axis.appendChild(dom.dot);
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changed = true;
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}
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// update contents
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if (this.data.content != this.content) {
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this.content = this.data.content;
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if (this.content instanceof Element) {
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dom.content.innerHTML = '';
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dom.content.appendChild(this.content);
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}
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else if (this.data.content != undefined) {
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dom.content.innerHTML = this.content;
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}
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else {
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throw new Error('Property "content" missing in item ' + this.data.id);
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}
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changed = true;
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}
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// update class
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var className = (this.data.className? ' ' + this.data.className : '') +
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(this.selected ? ' selected' : '');
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if (this.className != className) {
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this.className = className;
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dom.box.className = 'item box' + className;
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dom.line.className = 'item line' + className;
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dom.dot.className = 'item dot' + className;
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changed = true;
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}
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}
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return changed;
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};
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/**
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* Show the item in the DOM (when not already visible). The items DOM will
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* be created when needed.
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* @return {Boolean} changed
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*/
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ItemBox.prototype.show = function show() {
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if (!this.dom || !this.dom.box.parentNode) {
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return this.repaint();
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}
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else {
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return false;
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}
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};
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/**
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* Hide the item from the DOM (when visible)
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* @return {Boolean} changed
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*/
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ItemBox.prototype.hide = function hide() {
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var changed = false,
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dom = this.dom;
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if (dom) {
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if (dom.box.parentNode) {
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dom.box.parentNode.removeChild(dom.box);
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changed = true;
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}
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if (dom.line.parentNode) {
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dom.line.parentNode.removeChild(dom.line);
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}
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if (dom.dot.parentNode) {
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dom.dot.parentNode.removeChild(dom.dot);
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}
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}
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return changed;
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};
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/**
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* Reflow the item: calculate its actual size and position from the DOM
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* @return {boolean} resized returns true if the axis is resized
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* @override
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*/
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ItemBox.prototype.reflow = function reflow() {
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var changed = 0,
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update,
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dom,
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props,
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options,
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margin,
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start,
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align,
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orientation,
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top,
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left,
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data,
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range;
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if (this.data.start == undefined) {
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throw new Error('Property "start" missing in item ' + this.data.id);
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}
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data = this.data;
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range = this.parent && this.parent.range;
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if (data && range) {
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// TODO: account for the width of the item
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var interval = (range.end - range.start);
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this.visible = (data.start > range.start - interval) && (data.start < range.end + interval);
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}
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else {
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this.visible = false;
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}
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if (this.visible) {
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dom = this.dom;
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if (dom) {
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update = util.updateProperty;
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props = this.props;
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options = this.options;
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start = this.parent.toScreen(this.data.start);
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align = options.align || this.defaultOptions.align;
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margin = options.margin && options.margin.axis || this.defaultOptions.margin.axis;
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orientation = options.orientation || this.defaultOptions.orientation;
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changed += update(props.dot, 'height', dom.dot.offsetHeight);
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changed += update(props.dot, 'width', dom.dot.offsetWidth);
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changed += update(props.line, 'width', dom.line.offsetWidth);
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changed += update(props.line, 'height', dom.line.offsetHeight);
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changed += update(props.line, 'top', dom.line.offsetTop);
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changed += update(this, 'width', dom.box.offsetWidth);
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changed += update(this, 'height', dom.box.offsetHeight);
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if (align == 'right') {
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left = start - this.width;
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}
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else if (align == 'left') {
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left = start;
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}
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else {
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// default or 'center'
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left = start - this.width / 2;
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}
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changed += update(this, 'left', left);
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changed += update(props.line, 'left', start - props.line.width / 2);
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changed += update(props.dot, 'left', start - props.dot.width / 2);
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changed += update(props.dot, 'top', -props.dot.height / 2);
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if (orientation == 'top') {
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top = margin;
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changed += update(this, 'top', top);
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}
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else {
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// default or 'bottom'
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var parentHeight = this.parent.height;
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top = parentHeight - this.height - margin;
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changed += update(this, 'top', top);
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}
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}
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else {
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changed += 1;
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}
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}
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return (changed > 0);
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};
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/**
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* Create an items DOM
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* @private
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*/
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ItemBox.prototype._create = function _create() {
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var dom = this.dom;
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if (!dom) {
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this.dom = dom = {};
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// create the box
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dom.box = document.createElement('DIV');
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// className is updated in repaint()
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// contents box (inside the background box). used for making margins
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dom.content = document.createElement('DIV');
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dom.content.className = 'content';
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dom.box.appendChild(dom.content);
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// line to axis
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dom.line = document.createElement('DIV');
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dom.line.className = 'line';
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// dot on axis
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dom.dot = document.createElement('DIV');
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dom.dot.className = 'dot';
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}
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};
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/**
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* Reposition the item, recalculate its left, top, and width, using the current
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* range and size of the items itemset
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* @override
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*/
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ItemBox.prototype.reposition = function reposition() {
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var dom = this.dom,
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props = this.props,
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orientation = this.options.orientation || this.defaultOptions.orientation;
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if (dom) {
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var box = dom.box,
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line = dom.line,
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dot = dom.dot;
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box.style.left = this.left + 'px';
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box.style.top = this.top + 'px';
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line.style.left = props.line.left + 'px';
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if (orientation == 'top') {
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line.style.top = 0 + 'px';
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line.style.height = this.top + 'px';
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}
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else {
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// orientation 'bottom'
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line.style.top = (this.top + this.height) + 'px';
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line.style.height = Math.max(this.parent.height - this.top - this.height +
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this.props.dot.height / 2, 0) + 'px';
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}
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dot.style.left = props.dot.left + 'px';
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dot.style.top = props.dot.top + 'px';
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}
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};
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