The XForms switch, case and toggle elements are often used to implement a tabbed view in complex applications. This article demonstrates how they can also be employed at a much finer granularity to build individual composite controls.
This approach can be of particular use when the available display area is severely limited, as the following code shows:
<xf:switch> <xf:case id="case-display"> <xf:trigger> <xf:label ref="/data" /> <xf:action ev:event="DOMActivate"> <xf:toggle case="case-edit" /> <xf:setfocus control="edit" /> </xf:action> </xf:trigger> </xf:case> <xf:case id="case-edit"> <xf:input ref="/data" id="edit"> <xf:toggle ev:event="DOMFocusOut" case="case-display" /> </xf:input> </xf:case> </xf:switch>
Another scenario where composite controls can be helpful is when a trigger is used to invoke some activity that may take a long time to complete. In these cases, a busy animation can be switched for the activated trigger, indicating to the user that the application is processing their request:
<xf:switch> <xf:case id="case-ready"> <xf:trigger> <xf:label>Submit</xf:label> <xf:action ev:event="DOMActivate"> <xf:toggle case="case-busy" /> ... </xf:action> </xf:trigger> </xf:case> <xf:case id="case-busy"> <img src="status-busy.gif" alt="Please wait..." /> </xf:case> </xf:switch>
toggle back to the ready case. 
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To build individual composite
To build individual composite controls is not an easy task I think...
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A toggle switch is a class of
A toggle switch is a class of electrical switches that are actuated by a mechanical lever, handle, or rocking mechanism. Toggle switches are available in many different styles and sizes, and are used in countless applications. Many are designed to provide, the simultaneous actuation of multiple sets of electrical contacts, or the control of large amounts of electric current or mains voltages. The word toggle is a reference to a kind of mechanism or joint consisting of two arms, which are almost in line with each other, connected with an elbow-like pivot. In the phrase "toggle switch" it specifically refers to one kind of mechanism that can be used to implement a positive snap-action. However, the word "toggle switch" has come to mean any kind of switch with a short handle and a positive snap-action, whether it actually contains a toggle mechanism or not.
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JavaScript composite control
JavaScript composite control version:
HTML (this is the only bit your designer would have to change - the rest is automagic):
<span onclick="edit()" data="location.of.data">text to in-line edit</span>
In addition you would need to add the following site wide JavaScript (only once though). There is some Mootools syntax, but could be rewritten for raw JS:
// Adds in-line edit to any span/div and places the data
// at the location defined in the element's 'data' property
function edit(event) {
var field = event.currentTarget;
eval('var prop = ' + field.get('data'));
// Create the editable element and add a closure that does the updates
var input = new Element('input').addEvent('change',function() {
swapInElement(field, input);
prop = input.get('value'); field.set('text',prop);
// You may want to add a global update function here
});
swapInElement(input, field).focus();
}
One utility function for completeness sake...
function swapInElement = function(toAdd,toRemove) {
var previousNode = toRemove.getPrevious();
var parent = toRemove.getParent();
toRemove.dispose();
if (!$defined(previousNode)) {
toAdd.inject(parent, 'top');
} else {
toAdd.injectAfter(previousNode);
}
return toAdd;
}
I definitely think this is
I definitely think this is the right approach. You are definitely going in the right direction with this.
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