【发布时间】:2014-04-15 07:04:42
【问题描述】:
我正在将 Web 应用程序从 Dojo 1.3.1 迁移到 Dojo 1.9.3。该应用程序有很多自定义小部件。其中之一是HelpTip,它是从dijit/Tooltip 扩展而来的。
现在,当我单击显示帮助提示的按钮时,在下面显示的第 2 行出现异常,显示为TypeError: this._showTimer.remove is not a function。
if(this._showTimer){
this._showTimer.remove();
delete this._showTimer;
}
我从 dijit/Tooltip (Dojo 1.9.1) 的 open 函数中复制了上面的代码。但 dijit.Tooltip (Dojo 1.3.1) 有所不同,如下所示:
if(this._showTimer){
clearTimeout(this._showTimer);
delete this._showTimer;
}
当我调试应用程序时,它会在_showTimer 变量中显示一些编号值。因此,您可以看到在 1.3.1 版本的应用程序中,clearTimeout 获得了一个数字并且它工作正常。但在 1.9.3 版本中,它试图调用编号值的 remove 方法,我真的不知道这是为了什么。
编辑:
这是我的HelpTip.js 文件的代码
define([
"dojo/_base/array",
"dojo/_base/declare",
"dojo/_base/lang",
"dojo/dom",
"dojo/has",
"dojo/topic",
"dijit/Tooltip",
"dojo/on"
], function (array, declare, lang, dom, has, topic, Tooltip, on) {
var HelpTip = declare("tt.widget.HelpTip",Tooltip,{
// summary
// Pops up a tooltip (a help message) when you hover over a node.
showDelay: 0,
_noHelpAvailable: "Unable to load help for this item. Please contact support.",
api: null,
connectHandlers: function(/*Array*/ ids) {
array.forEach(ids, function(id) {
var node = dom.byId(id);
if (node && node.tagName.toLowerCase() != "html" && node.tagName.toLowerCase() != "head" && node.tagName.toLowerCase() != "body") {
this.connectId.push(node);
// For A11y we may need to work with onFocus as well
this.connect(node, "onclick", "_onClick");
if(has("ie")){
// BiDi workaround
node.style.zoom = 1;
}
}
}, this);
},
disconnectHandlers: function(/*Array*/ ids) {
if (ids) {
for (var i = this._connects.length - 1; i >= 0; i--) {
if (this._connects[i] && this._connects[i][0] && this._connects[i][0][0]) {
if (array.indexOf(ids, this._connects[i][0][0].id) != -1) {
this._connects[i].remove();
}
}
}
}
},
_onClick: function(/*Event*/ e) {
e.preventDefault(); // don't navigate!
this._onHover(/*Event*/ e);
},
_onHover: function(/*Event*/ e){
if (e.target.id == null || e.target.id == "") {
this.label = this._noHelpAvailable;
} else {
this.label = "Retreiving help for this item...";
this.aroundNode = e.target;
var ids = e.target.id.split("_");
this.api.helpGetText(lang.hitch(this, this.helpGetText), ids[0], ids[1], ids[2]);
}
if(!this._showTimer){
var target = e.target;
this._showTimer = setTimeout(lang.hitch(this, function(){this.open(target)}), this.showDelay);
}
},
_onUnHover: function(/*Event*/ e){
// keep a tooltip open if the associated element has focus
if(this._focus){ return; }
if(this._showTimer){
clearTimeout(this._showTimer);
delete this._showTimer;
}
this.closeNodeConnect.remove();
this.close();
},
helpGetText: function(/*String*/ helpText, /*Object*/ error) {
if (error) {
topic.publish("/errorHandling/trapError", error);
return;
}
this.closeNode = document.createElement("div");
this.closeNode.className = "fakeLink";
this.closeNode.innerHTML = "Close";
this.closeNodeConnect = this.connect(this.closeNode, "click", "_onUnHover");
if (helpText != null && helpText != "") {
if (dijit._masterTT.containerNode != null) {
dijit._masterTT.containerNode.innerHTML = helpText + "<br><br>";
dijit._masterTT.containerNode.appendChild(this.closeNode);
}
} else {
if (dijit._masterTT.containerNode != null) {
dijit._masterTT.containerNode.innerHTML = this._noHelpAvailable + "<br><br>";
dijit._masterTT.containerNode.appendChild(this.closeNode);
}
}
// Firefox bug. when innerHTML changes to be shorter than previous
// one, the node size will not be updated until it moves.
dijit._masterTT.domNode.style.top = (dijit._masterTT.domNode.offsetTop + 1) + "px";
// position the element and change CSS according to position
var align = dijit._masterTT.isLeftToRight() ? {'BR': 'BL', 'BL': 'BR'} : {'BL': 'BR', 'BR': 'BL'};
var pos = dijit.placeOnScreenAroundElement(dijit._masterTT.domNode, this.aroundNode, align);
this.aroundNode = null;
dijit._masterTT.domNode.className="dijitTooltip dijitTooltip" + (pos.corner=='BL' ? "Right" : "Left");//FIXME: might overwrite class
}
}
);
return HelpTip;
});
谢谢
【问题讨论】:
-
您能否发布您用于创建
HelpTip的代码,或者您的HelpTip本身的代码?当您单步执行代码时,最好知道_showTimer的值是什么。 -
调试器显示_showTime=417
-
你能发布
HelpTip的代码,以及你用来调用/创建它的代码吗? -
我已经更新了问题并粘贴了HelpTip.js文件的代码。
标签: javascript dojo tooltip