jquery tools series overlay learning_jquery-JS Tutorial-php.cn

Following the study of scrollable last time, today we continue to study the fourth function of the six major functions of jquery tools - overlay.

For scrollable learning, first give the html target code of the operation:

Here is my overlay

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>close

This function is implemented through the jqueryObject.overlay() method, where The overlay method provides the following two methods:
1. $("button[rel]").overlay()//This method can use the default method to display the prompt overlay

2. $("button[rel]" ).overlay({config object}) //This method will customize the overlay display through the configuration object.

The following code is the configuration parameter implementation of the second method (just put the implementation in the ready method of jquery):

Copy code
The code is as follows :

$("#overlay").overlay({api:true}).load();//Automatically display overlay, (no need to trigger, it will be automatically triggered when the page is loaded)
$ ("button[rel]").overlay({
start:{
width: 300,
absolute: false
},
finish:{
top:10,
left:400,
absolute:false
},
speed:3000,
fadeInSpeed:3000,
closeOn Click: false,
oneInstance:false,
close: '#overlayClose',//Customize the close button
                                                                                                                                                                                                                                                                                   . Function configuration item mode setting
:function(){
                //alert(this .getTrigger().attr("rel") ":onBeforeLoad");//Display the trigger rel attribute value of the overlay prompt box (this.getTrigger().attr("rel") ":onLoad");
},
onBeforeClose:function(){
alert(this.getTrigger().attr("rel") ":onBeforeClose");
                                                                 return false;

Attributes

Default value Description start (Object) {top: 'center',left: 'center', width: 0,absolute: false} is used to set the starting position and size of the overlay pop-up box. By default, the starting position of the overlay pop-up box is the position of its trigger (that is, the page element that triggers its display), and the initial size of the overlay pop-up box is 0; if the overlay is not triggered by a page element, then it starts The position is the middle of the screen. The default value of this attribute can be overridden through the following parameter settings: top: used to set the overlay pop-up box The starting position is based on the distance from the top edge of the screen. left: Used to set the distance between the starting position of the overlay pop-up box and the left edge of the screen. width: used to set the width of the overlay pop-up box at the starting position (i.e. the initial position of the pop-up box Width); the height of the overlay at the beginning will be automatically calculated based on the width. absolute: If this value is set to true, then the position at the beginning of the overlay pop-up box will be this time Calculated based on the upper left corner of the browser window and does not take scroll position into account. If this value is set to , the position at the beginning of the overlay popup will take the scroll position into account. 　 finish (Object) {top: 100,left: 'center',absolute: false} is used to set the overlay pop-up box final location and size. , you can override the default value of this attribute through the following parameter settings: top: used to set the overlay popup The final position of the box relative to the top edge of the screen. left: Used to set the final position of the overlay pop-up box according to the distance from the left edge of the screen. absolute: If this value is set to true, the final position of the overlay pop-up box will be based on Calculated from the upper left corner of the browser window and does not take scroll position into account. If this value is set to , the final position of the overlay popup will take the scroll position into account. In addition, the size of the final position of the overlay pop-up box is set by the relevant css properties. expose 　 Overlay pop-up boxes are often used together with the expose function. The way the two are used together is set through the configuration attribute of the overlay. This configuration item accepts the configuration object of the expose function. This property accepts two types of parameters: one is a string that only accepts the expose background color setting; the other is the expose configuration object. The two parameter modes of this attribute can be found in the examples in this article. speed 'normal' Set overlay popup box Pop-up speed. Valid values accepted by this property are: slow, normal, fast, and milliseconds. If the value of this property is set to 0, the overlay pop-up box will be displayed immediately without animation. fadeInSpeed 'fast' Set overlay pop-up box The speed at which the content is displayed. This property accepts valid values through the speed property. oneInstance TRUE By default, one page Only an overlay popup box will be displayed.However, you can allow the page to display multiple overlay popups by setting this property to false. (Note: This attribute can only have a more obvious effect when closeOnClick is set to false.) closeOnClick TRUE By default, clicking on other areas outside the overlay pop-up box on the page can close the overlay pop-up box. However, setting this property to false disables this functionality. preload TRUE By default, the background image will be preloaded into the browser's cache. Therefore, when the overlay prompt box is opened, the background image of the overlay prompt box has been loaded into the cache, so when the overlay prompt box is triggered, the entire pop-up process of the prompt box will be smooth. Additionally, preloading of the background image can be prevented by setting the property to false. close 　 Close button settings. If the user does not provide a close button for the overlay prompt box there, then the overlay prompt box will automatically generate a close button. For user-customized ways to turn off the overlay prompt button, please refer to the relevant examples in this article. zIndex 9999 Set the z of the overlay prompt box -index attribute (css), as for the role of the z-index attribute, please refer to relevant information. This property has been set to a very high value -999, so under normal circumstances, this property does not need to be set again. However, it should be noted that this value should be greater than the z-index value of other elements on the page. target If the rel attribute does not specify an overlay prompt box, then you can set the overlay prompt box element through this attribute. onBeforeLoad None callback function, this attribute will be executed before the overlay prompt box is triggered. If the function returns false, then the overlay prompt box will will be blocked and not displayed. onLoad None callback function, this attribute will Executed after the overlay prompt box is triggered. onBeforeClose None callback function. This property will be executed after the overlay prompt box closing event is triggered and before the overlay prompt box is closed. Return false to prevent the overlay prompt box from closing. onClose None callback function. This property will be triggered after the overlay prompt box is closed. api FALSE This property setting is the same as selector, API properties of tab function. For the meaning of this attribute, please refer to the selector and tab related instructions in this series.

In addition, the tooltip also provides a series of methods for obtaining overlay objects. The specific usage methods are as follows:

Copy code The code is as follows:

var overlayObj=$("#overlay").overlay({api:true});
overlayObj.load();//Automatically display overlay, (no need to trigger, it will be loaded on the page Automatically triggered when completed)
setTimeout(function(){overlayObj.close();},2000);//After 2 seconds, the automatically loaded (appeared) prompt box will be hidden
$("#overlayInfo") .append("

overlay is opened:" overlayObj.isOpened() "

");//Determine whether there is an overlay prompt box displayed at this time
. append("

overlay background image:" overlayObj.getBackgroundImage() "

"); getTrigger () "

"); );
$("#overlayInfo").append("

overlay content:" overlayObj.getContent().html() "

"); OnbeforeLoad = Function () {
Alert (this.getContent (). Attr ("ID");
}

The following is the description of the Overlay object description:

Method

Default value	Description
load()	Overlay	Another way to open the overlay prompt box, through this method you can not pass The page event is triggered and the overlay prompt box is opened directly through the js script.
close()	Overlay	(via the call to this method from the js script) close the pop-up overlay prompt box.
isOpened()	boolean	Determine whether there is currently an overlay prompt box opened. If the overlay prompt box is currently opened, return true.
getBackgroundImage()	jQuery	Return the background image of the current overlay prompt box as a jquery object.
getContent()	jQuery	Return the content of the overlay pop-up box as a jquery object.
getTrigger()	jQuery	The element that will trigger the overlay popup box is returned as a jquery object.
getConf()	Object	Get the configuration object of overlay when the popup box is initialized.
api	FALSE	Same as api in configuration object.

onBeforeLoad(fn)	API	Same as the onBeforeLoad attribute in the configuration file.
onLoad(fn)	API	Same configuration file in onLoad attribute.
onBeforeClose(fn)	API	Same configuration file in onBeforeClose attribute.
onClose(fn)	API	Same configuration file in onClose attribute.

Finally, the complete sample code is given:

Copy the code The code is as follows:

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Here is my overlay

$$$$$$$$$$

         Class aptent taciti sociosqu ad litora torquent per conubia nostra,
         per inceptos himenaeos. Donec lorem ligula, elementum vitae,
         imperdiet a, posuere nec, ante. Quisque mattis massa id metus.