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101 lines
3.0 KiB
101 lines
3.0 KiB
/**
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* A panel can contain components
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* @param {Component} [parent]
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* @param {Component[]} [depends] Components on which this components depends
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* (except for the parent)
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* @param {Object} [options] Available parameters:
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* {String | Number | function} [left]
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* {String | Number | function} [top]
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* {String | Number | function} [width]
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* {String | Number | function} [height]
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* {String | function} [className]
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* @constructor Panel
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* @extends Component
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*/
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function Panel(parent, depends, options) {
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this.id = util.randomUUID();
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this.parent = parent;
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this.depends = depends;
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this.options = {};
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this.setOptions(options);
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}
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Panel.prototype = new Component();
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/**
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* Get the container element of the panel, which can be used by a child to
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* add its own widgets.
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* @returns {HTMLElement} container
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*/
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Panel.prototype.getContainer = function () {
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return this.frame;
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};
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/**
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* Repaint the component
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* @return {Boolean} changed
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*/
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Panel.prototype.repaint = function () {
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var changed = 0,
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update = util.updateProperty,
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asSize = util.option.asSize,
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options = this.options,
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frame = this.frame;
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if (!frame) {
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frame = document.createElement('div');
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frame.className = 'panel';
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if (options.className) {
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if (typeof options.className == 'function') {
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util.addClassName(frame, String(options.className()));
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}
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else {
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util.addClassName(frame, String(options.className));
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}
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}
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this.frame = frame;
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changed += 1;
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}
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if (!frame.parentNode) {
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if (!this.parent) {
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throw new Error('Cannot repaint panel: no parent attached');
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}
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var parentContainer = this.parent.getContainer();
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if (!parentContainer) {
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throw new Error('Cannot repaint panel: parent has no container element');
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}
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parentContainer.appendChild(frame);
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changed += 1;
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}
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changed += update(frame.style, 'top', asSize(options.top, '0px'));
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changed += update(frame.style, 'left', asSize(options.left, '0px'));
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changed += update(frame.style, 'width', asSize(options.width, '100%'));
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changed += update(frame.style, 'height', asSize(options.height, '100%'));
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return (changed > 0);
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};
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/**
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* Reflow the component
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* @return {Boolean} resized
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*/
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Panel.prototype.reflow = function () {
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var changed = 0,
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update = util.updateProperty,
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frame = this.frame;
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if (frame) {
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changed += update(this, 'top', frame.offsetTop);
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changed += update(this, 'left', frame.offsetLeft);
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changed += update(this, 'width', frame.offsetWidth);
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changed += update(this, 'height', frame.offsetHeight);
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}
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else {
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changed += 1;
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}
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return (changed > 0);
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};
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