使 jQuery Tipsy 工具提示随鼠标移动

Question

我确信这是可能的——而且可能非常简单——但我不知道如何让它发挥作用。如何使 Tipsy 工具提示随鼠标水平移动？

当鼠标悬停在启用 Tipsy 的元素上时，我希望工具提示显示在其正常的 Y 位置（元素正上方），但我希望它等于鼠标的 X 位置。让事情变得有点复杂的是，我试图仅对重力为 2 个字符（“nw”、“ne”、“sw”、“se”）的元素启用 mousemove 功能。

没有代码可以发布，因为我尝试过的所有方法都不起作用，并且该插件是公开可用的。

Answer 1

请注意，笔尖不会完全跟随鼠标。它将跟随应用尖端的元素的相应边缘。

如果您希望提示跟随鼠标在显示屏上的实际位置，那么您应该考虑使用不同的插件。

---

使用方法：

$('.element').tipsy({follow: 'x'});

$('.element').tipsy({follow: 'y'});

---

插件本身（需要更多测试）

// tipsy, facebook style tooltips for jquery
// version 1.0.0a
// (c) 2008-2010 jason frame [[email protected]]
// releated under the MIT license

(function($) {

    function fixTitle($ele) {
        if ($ele.attr('title') || typeof($ele.attr('original-title')) != 'string') {
            $ele.attr('original-title', $ele.attr('title') || '').removeAttr('title');
        }
    }

    function Tipsy(element, options) {
        this.$element = $(element);
        this.options = options;
        this.enabled = true;
        fixTitle(this.$element);
    }

    Tipsy.prototype = {
        show: function() {
            var title = this.getTitle();
            if (title && this.enabled) {
                var $tip = this.tip();

                $tip.find('.tipsy-inner')[this.options.html ? 'html' : 'text'](title);
                $tip[0].className = 'tipsy'; // reset classname in case of dynamic gravity
                $tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).appendTo(document.body);

                var pos = $.extend({}, this.$element.offset(), {
                    width: this.$element[0].offsetWidth,
                    height: this.$element[0].offsetHeight
                });

                var actualWidth = $tip[0].offsetWidth, actualHeight = $tip[0].offsetHeight;
                var gravity = (typeof this.options.gravity == 'function')
                                ? this.options.gravity.call(this.$element[0])
                                : this.options.gravity;

                var tp;
                switch (gravity.charAt(0)) {
                    case 'n':
                        tp = {top: pos.top + pos.height + this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
                        break;
                    case 's':
                        tp = {top: pos.top - actualHeight - this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
                        break;
                    case 'e':
                        tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - this.options.offset};
                        break;
                    case 'w':
                        tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width + this.options.offset};
                        break;
                }

                if (gravity.length == 2) {
                    if (gravity.charAt(1) == 'w') {
                        tp.left = pos.left + pos.width / 2 - 15;
                    } else {
                        tp.left = pos.left + pos.width / 2 - actualWidth + 15;
                    }
                }

                $tip.css(tp).addClass('tipsy-' + gravity);

                if (this.options.fade) {
                    $tip.stop().css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: this.options.opacity});
                } else {
                    $tip.css({visibility: 'visible', opacity: this.options.opacity});
                }
            }
        },

        hide: function() {
            if (this.options.fade) {
                this.tip().stop().fadeOut(function() { $(this).remove(); });
            } else {
                this.tip().remove();
            }
        },

        getTitle: function() {
            var title, $e = this.$element, o = this.options;
            fixTitle($e);
            var title, o = this.options;
            if (typeof o.title == 'string') {
                title = $e.attr(o.title == 'title' ? 'original-title' : o.title);
            } else if (typeof o.title == 'function') {
                title = o.title.call($e[0]);
            }
            title = ('' + title).replace(/(^\s*|\s*$)/, "");
            return title || o.fallback;
        },

        tip: function() {
            if (!this.$tip) {
                this.$tip = $('<div class="tipsy"></div>').html('<div class="tipsy-arrow"></div><div class="tipsy-inner"/></div>');
            }
            return this.$tip;
        },

        validate: function() {
            if (!this.$element[0].parentNode) {
                this.hide();
                this.$element = null;
                this.options = null;
            }
        },

        enable: function() { this.enabled = true; },
        disable: function() { this.enabled = false; },
        toggleEnabled: function() { this.enabled = !this.enabled; }
    };

    $.fn.tipsy = function(options) {

        if (options === true) {
            return this.data('tipsy');
        } else if (typeof options == 'string') {
            return this.data('tipsy')[options]();
        }

        options = $.extend({}, $.fn.tipsy.defaults, options);

        function get(ele) {
            var tipsy = $.data(ele, 'tipsy');
            if (!tipsy) {
                tipsy = new Tipsy(ele, $.fn.tipsy.elementOptions(ele, options));
                $.data(ele, 'tipsy', tipsy);
            }
            return tipsy;
        }

        function enter() {
            var tipsy = get(this);
            tipsy.hoverState = 'in';
            if (options.delayIn == 0) {
                tipsy.show();
            } else {
                setTimeout(function() { if (tipsy.hoverState == 'in') tipsy.show(); }, options.delayIn);
            }
        };

                function move(event) {
                        var tipsy = get(this);
                        tipsy.hoverState = 'in';
                        if (options.follow == 'x') {
                            var arrow = $(tipsy.$tip).children('.tipsy-arrow');
                            if (/^[^w]w$/.test(options.gravity) && arrow.position() != null) {
                                var x = event.pageX - ($(arrow).position().left+($(arrow).outerWidth()/2));
                            } else if (/^[^e]e$/.test(options.gravity) && arrow.position() != null) {
                                var x = event.pageX - ($(arrow).position().left+($(arrow).outerWidth()/2));
                            } else {
                                var x = event.pageX - ($(tipsy.$tip).outerWidth()/2);
                            }
                            $(tipsy.$tip).css('left', x);
                        } else if (options.follow == 'y') {
                            if (/^w|^e/.test(options.gravity) ) {
                                $(tipsy.$tip).css('top', event.pageY-($(tipsy.$tip).outerHeight()/2));
                            }
                        }

                }

        function leave() {
            var tipsy = get(this);
            tipsy.hoverState = 'out';
            if (options.delayOut == 0) {
                tipsy.hide();
            } else {
                setTimeout(function() { if (tipsy.hoverState == 'out') tipsy.hide(); }, options.delayOut);
            }
        };

        if (!options.live) this.each(function() { get(this); });

        if (options.trigger != 'manual') {
            var binder   = options.live ? 'live' : 'bind',
                eventIn  = options.trigger == 'hover' ? 'mouseenter' : 'focus',
                eventOut = options.trigger == 'hover' ? 'mouseleave' : 'blur',
                                eventMove = 'mousemove';
            this[binder](eventIn, enter)[binder](eventOut, leave)[binder](eventMove, move);

        }

        return this;

    };

    $.fn.tipsy.defaults = {
        delayIn: 0,
        delayOut: 0,
        fade: false,
        fallback: '',
        gravity: 'n',
        html: false,
        live: false,
        offset: 0,
        opacity: 0.8,
        title: 'title',
        trigger: 'hover',
                follow: false,
    };

    // Overwrite this method to provide options on a per-element basis.
    // For example, you could store the gravity in a 'tipsy-gravity' attribute:
    // return $.extend({}, options, {gravity: $(ele).attr('tipsy-gravity') || 'n' });
    // (remember - do not modify 'options' in place!)
    $.fn.tipsy.elementOptions = function(ele, options) {
        return $.metadata ? $.extend({}, options, $(ele).metadata()) : options;
    };

    $.fn.tipsy.autoNS = function() {
        return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n';
    };

    $.fn.tipsy.autoWE = function() {
        return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w';
    };

})(jQuery);