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Dec 11, 2012 - A progress bar is an indicator of the downloading process. A progress bar is an important element of the interface, which aims to show the user the current downloading progress.
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A progress bar can be a great way to visually show a percentage for a statistic or to track progress for a capital campaign in a compelling way. How to Add a Progress Bar. You can put a progress bar in any page or post content on your website by adding the Progress Bar block in your WordPress Editor. How to Edit Progress Bars. Progress bars track donations in real-time and show your campaign's success to date. With Classy, you can display progress bars on 4 campaign types to engage supporters and demonstrate your community’s progress toward your goal. The Option tab has a number of settings, and design options for the progress bar on the Multiple Choice question. You can change the Handle, change the size of the Track, Change the Orientation, change the progress bar options, change the range options, and add a variable to the progress bar. Progress Bar widget, can be used to add animated progress bars to show the progress of a task, project or skill. Following are some use cases: Showing the percentage of expertise you have for certain skill Showing the percentage of the task completion.
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Progress bars indicate the completion percentage of an operation or process. We can categorize progress bar as determinate progress bar and indeterminate progress bar.
Determinate progress bar should only be used in situations where the system can accurately update the current status. A determinate progress bar should never fill from left to right, then loop back to empty for a single process.
If the actual status cannot be calculated, an indeterminate progress bar should be used to provide user feedback.
jQueryUI provides an easy-to-use progress bar widget that we can use to let users know that our application is hard at work performing the requested operation. jQueryUI provides progressbar() method to create progress bars.
Syntax
The progressbar() method can be used in two forms −
$(selector, context).progressbar (options) Method
$(selector, context).progressbar ('action', params) Method
$ (selector, context).progressbar (options) Method
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The progressbar (options) method declares that an HTML element can be managed in the form of a progress bar. The options parameter is an object that specifies the appearance and behavior of progress bars.
Syntax
You can provide one or more options at a time using Javascript object. If there are more than one options to be provided then you will separate them using a comma as follows −
The following table lists the different options that can be used with this method −
| Sr.No. | Option & Description |
|---|---|
| 1 | disabled This option when set to true disables the progress bars. By default its value is false. |
| 2 | max This option sets the maximum value for a progress bar. By default its value is 100. |
| 3 | value This option specifies the initial value of the progress bar. By default its value is 0. |
The following section will show you a few working examples of progressbar functionality.
Default Functionality
The following example demonstrates a simple example of progressbar functionality, passing no parameters to the progressbar() method.
Let us save the above code in an HTML file progressbarexample.htm and open it in a standard browser which supports javascript, you must also see the following output. Now, you can play with the result −
This example shows the creation of progress bar using of progressbar() method. This is a default determinate progress bar.
Use of max and value
The following example demonstrates the usage of two options values and max in the progressbar function of JqueryUI.
Let us save the above code in an HTML file progressbarexample.htm and open it in a standard browser which supports javascript, you must also see the following output. Now, you can play with the result −
Here you can see that the progress bar fills from right to left and stops when the value reaches 300.
$ (selector, context).progressbar ('action', params) Method
The progressbar ('action', params) method can perform an action on progress bar, such as changing the percentage filled. The action is specified as a string in the first argument (e.g., 'value' to change the percentage filled). Check out the actions that can be passed, in the following table.
Syntax
The following table lists the different actions that can be used with this method −
| Sr.No. | Action & Description |
|---|---|
| 1 | destroy This action removes the progress bar functionality of an element completely. The elements return to their pre-init state. This method does not accept any arguments. |
| 2 | destroy This action removes the progress bar functionality of an element completely. The elements return to their pre-init state. This method does not accept any arguments. |
| 3 | disable This action disables the progress bar functionality of an element. This method does not accept any arguments. |
| 4 | enable This action enables the progress bar functionality. This method does not accept any arguments. |
| 5 | option( optionName ) This action retrieves the value currently associated with specified optionName. Where optionName is a String. |
| 6 | option This action gets an object containing key/value pairs representing the current progressbar options hash. This method does not accept any arguments. |
| 7 | option( optionName, value ) This action sets the value of the progressbar option associated with the specified optionName. |
| 8 | option( options ) This action sets one or more options for the progress bars. The argument options is a map of option-value pairs to be set. |
| 9 | value This action retrieves the current value of options.value, that is, the percentage of fill in the progress bar. |
| 10 | value( value ) This action specifies a new value to the percentage filled in the progress bar. The argument value can be a Number or Boolean. |
| 11 | widget This action returns a jQuery object containing the progressbar. This method does not accept any arguments. |
Example
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Now let us see an example using the actions from the above table. The following example demonstrates the use of disable() and option( optionName, value ) methods.
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Let us save the above code in an HTML file progressbarexample.htm and open it in a standard browser which supports javascript, you must also see the following output −
Disabled Progress bar
Progress bar with max value set
Event Management on progress bar elements
In addition to the progressbar (options) method which we saw in the previous sections, JqueryUI provides event methods which gets triggered for a particular event. These event methods are listed below −
| Sr.No. | Event Method & Description |
|---|---|
| 1 | change(event, ui) This event is triggered whenever the value of progress bar changes. Where event is of type Event, and ui is of type Object. |
| 2 | complete(event, ui) This event is triggered when the progressbar reaches the maximumm value. Where event is of type Event, and ui is of type Object. |
| 3 | create(event, ui) This event is triggered whenever progressbar is created. Where event is of type Event, and ui is of type Object. |
Example
The following example demonstrates the event method usage during progressbar functionality. This example demonstrates the use of events change and complete.
Let us save the above code in an HTML file progressbarexample.htm and open it in a standard browser which supports javascript, you must also see the following output −
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Here you can see as the progressbar changes its changed value is printed and upon complete event the 'Loading Completed!' message displays.