92 lines
2.2 KiB
JavaScript
92 lines
2.2 KiB
JavaScript
var bricks = window.bricks || {};
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var low_handle = function(widget, dim, last_pos, cur_pos, maxlen, winsize){
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var max_rate = cur_pos / (maxlen - winsize);
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if (Math.abs(cur_pos + winsize - maxlen) < 1){
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bricks.debug('fire max_threshold ......');
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widget.dispatch('max_threshold');
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return
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}
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if (cur_pos < 1) {
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bricks.debug('fire min_threshold ......');
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widget.dispatch('min_threshold');
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return
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}
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}
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bricks.HScrollPanel = class extends bricks.HBox {
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/*
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{
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min_threshold:
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max_threshold:
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}
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*/
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constructor(opts){
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opts.width = '100%';
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opts.height = '100%';
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opts.overflow = 'auto';
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super(opts);
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this.min_threshold = opts.min_threshold || 0.01;
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this.max_threshold = opts.max_threshold || 0.99;
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this.bind('scroll', this.scroll_handle.bind(this))
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this.last_scrollLeft = this.dom_element.scrollLeft;
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this.threshold = false;
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}
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scroll_handle(event){
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if (event.target != this.dom_element){
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// bricks.debug('HScroll():scroll on other', event.target);
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return;
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}
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var e = this.dom_element;
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if ( e.scrollWidth - e.clientWidth < 1) {
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// bricks.debug('HScroll():same size');
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return;
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}
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low_handle(this, 'x', this.last_scrollLeft,
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e.scrollLeft,
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e.scrollWidth,
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e.clientWidth);
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this.last_scrollLeft = e.scrollLeft;
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}
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}
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bricks.VScrollPanel = class extends bricks.VBox {
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/*
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{
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min_threshold:
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max_threshold:
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}
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*/
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constructor(opts){
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opts.width = '100%';
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opts.height = '100%';
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opts.overflow = 'auto';
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super(opts);
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this.min_threshold = opts.min_threshold || 0.02;
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this.max_threshold = opts.max_threshold || 0.95;
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this.bind('scroll', this.scroll_handle.bind(this))
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this.last_scrollY = this.dom_element.scrollY;
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}
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scroll_handle(event){
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if (event.target != this.dom_element){
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// bricks.debug('scroll on other', event.target);
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return;
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}
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var e = this.dom_element;
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if ( e.scrollHeight - e.clientHeight < 2) {
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// bricks.debug('same size');
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return;
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}
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low_handle(this, 'y', this.last_scrollTop,
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e.scrollTop,
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e.scrollHeight,
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e.clientHeight);
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this.last_scrollTop = e.scrollTop;
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}
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}
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bricks.Factory.register('VScrollPanel', bricks.VScrollPanel);
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bricks.Factory.register('HScrollPanel', bricks.HScrollPanel);
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