A template class that supports advanced functionality like autofilling arrays, conditional processing with - * basic comparison operators, sub-templates, basic math function support, special built-in template variables, - * inline code execution and more. XTemplate also provides the templating mechanism built into {@link Ext.DataView}.
- *XTemplate supports many special tags and built-in operators that aren't defined as part of the API, but are - * supported in the templates that can be created. The following examples demonstrate all of the supported features. - * This is the data object used for reference in each code example:
+ *A template class that supports advanced functionality like:
XTemplate provides the templating mechanism built into:
For example usage {@link #XTemplate see the constructor}.
+ * + * @constructor + * The {@link Ext.Template#Template Ext.Template constructor} describes + * the acceptable parameters to pass to the constructor. The following + * examples demonstrate all of the supported features. + * + *This is the data object used for reference in each code example:
*
var data = {
name: 'Jack Slocum',
@@ -36,104 +62,161 @@ var data = {
}]
};
* Auto filling of arrays
The tpl tag and the for operator are used
- * to process the provided data object. If for="." is specified, the data object provided
- * is examined. If the variable in for is an array, it will auto-fill, repeating the template
- * block inside the tpl tag for each item in the array:
The tpl tag and the for operator are used + * to process the provided data object: + *
+<tpl for=".">...</tpl> // loop through array at root node
+<tpl for="foo">...</tpl> // loop through array at foo node
+<tpl for="foo.bar">...</tpl> // loop through array at foo.bar node
+ *
var tpl = new Ext.XTemplate(
'<p>Kids: ',
- '<tpl for=".">',
- '<p>{name}</p>',
+ '<tpl for=".">', // process the data.kids node
+ '<p>{#}. {name}</p>', // use current array index to autonumber
'</tpl></p>'
);
tpl.overwrite(panel.body, data.kids); // pass the kids property of the data object
* Scope switching
The for property can be leveraged to access specified members
- * of the provided data object to populate the template:
An example illustrating how the for property can be leveraged + * to access specified members of the provided data object to populate the template:
*
var tpl = new Ext.XTemplate(
'<p>Name: {name}</p>',
'<p>Title: {title}</p>',
'<p>Company: {company}</p>',
'<p>Kids: ',
- '<tpl for="kids">', // interrogate the kids property within the data
+ '<tpl for="kids">', // interrogate the kids property within the data
'<p>{name}</p>',
'</tpl></p>'
);
+tpl.overwrite(panel.body, data); // pass the root node of the data object
+ * Flat arrays that contain values (and not objects) can be auto-rendered + * using the special {.} variable inside a loop. This variable + * will represent the value of the array at the current index:
+ *
+var tpl = new Ext.XTemplate(
+ '<p>{name}\'s favorite beverages:</p>',
+ '<tpl for="drinks">',
+ '<div> - {.}</div>',
+ '</tpl>'
+);
tpl.overwrite(panel.body, data);
* Access to parent object from within sub-template scope
When processing a sub-template, for example while
- * looping through a child array, you can access the parent object's members via the parent object:
When processing a sub-template, for example while looping through a child array, + * you can access the parent object's members via the parent object:
*
var tpl = new Ext.XTemplate(
'<p>Name: {name}</p>',
'<p>Kids: ',
'<tpl for="kids">',
- '<tpl if="age > 1">', // <-- Note that the > is encoded
+ '<tpl if="age > 1">',
'<p>{name}</p>',
- '<p>Dad: {parent.name}</p>',
+ '<p>Dad: {parent.name}</p>',
'</tpl>',
'</tpl></p>'
);
tpl.overwrite(panel.body, data);
-Array item index and basic math support
While processing an array, the special variable {#}
- * will provide the current array index + 1 (starts at 1, not 0). Templates also support the basic math operators
- * + - * and / that can be applied directly on numeric data values:
The tpl tag and the if operator are used + * to provide conditional checks for deciding whether or not to render specific + * parts of the template. Notes:
+<tpl if="age > 1 && age < 10">Child</tpl>
+<tpl if="age >= 10 && age < 18">Teenager</tpl>
+<tpl if="this.isGirl(name)">...</tpl>
+<tpl if="id==\'download\'">...</tpl>
+<tpl if="needsIcon"><img src="{icon}" class="{iconCls}"/></tpl>
+// no good:
+<tpl if="name == "Jack"">Hello</tpl>
+// encode " if it is part of the condition, e.g.
+<tpl if="name == "Jack"">Hello</tpl>
+ *
var tpl = new Ext.XTemplate(
'<p>Name: {name}</p>',
'<p>Kids: ',
'<tpl for="kids">',
- '<tpl if="age > 1">', // <-- Note that the > is encoded
- '<p>{#}: {name}</p>', // <-- Auto-number each item
- '<p>In 5 Years: {age+5}</p>', // <-- Basic math
- '<p>Dad: {parent.name}</p>',
+ '<tpl if="age > 1">',
+ '<p>{name}</p>',
'</tpl>',
'</tpl></p>'
);
tpl.overwrite(panel.body, data);
-Auto-rendering of flat arrays
Flat arrays that contain values (and not objects) can be auto-rendered
- * using the special {.} variable inside a loop. This variable will represent the value of
- * the array at the current index:
-var tpl = new Ext.XTemplate(
- '<p>{name}\'s favorite beverages:</p>',
- '<tpl for="drinks">',
- '<div> - {.}</div>',
- '</tpl>'
-);
-tpl.overwrite(panel.body, data);
-Basic conditional logic
Using the tpl tag and the if
- * operator you can provide conditional checks for deciding whether or not to render specific parts of the template.
- * Note that there is no else operator — if needed, you should use two opposite if statements.
- * Properly-encoded attributes are required as seen in the following example:
The following basic math operators may be applied directly on numeric + * data values:
+ * + - * / + *+ * For example: *
var tpl = new Ext.XTemplate(
'<p>Name: {name}</p>',
'<p>Kids: ',
'<tpl for="kids">',
'<tpl if="age > 1">', // <-- Note that the > is encoded
- '<p>{name}</p>',
+ '<p>{#}: {name}</p>', // <-- Auto-number each item
+ '<p>In 5 Years: {age+5}</p>', // <-- Basic math
+ '<p>Dad: {parent.name}</p>',
'</tpl>',
'</tpl></p>'
);
tpl.overwrite(panel.body, data);
Ability to execute arbitrary inline code
In an XTemplate, anything between {[ ... ]} is considered
- * code to be executed in the scope of the template. There are some special variables available in that code:
+ *
Anything between {[ ... ]} is considered code to be executed
+ * in the scope of the template. There are some special variables available in that code:
*
var tpl = new Ext.XTemplate(
'<p>Name: {name}</p>',
@@ -146,8 +229,13 @@ var tpl = new Ext.XTemplate(
'</tpl></p>'
);
tpl.overwrite(panel.body, data);
-Template member functions
One or more member functions can be defined directly on the config
+ *
+ *
One or more member functions can be specified in a configuration * object passed into the XTemplate constructor for more complex processing:
*
var tpl = new Ext.XTemplate(
@@ -157,25 +245,35 @@ var tpl = new Ext.XTemplate(
'<tpl if="this.isGirl(name)">',
'<p>Girl: {name} - {age}</p>',
'</tpl>',
+ // use opposite if statement to simulate 'else' processing:
'<tpl if="this.isGirl(name) == false">',
'<p>Boy: {name} - {age}</p>',
'</tpl>',
'<tpl if="this.isBaby(age)">',
'<p>{name} is a baby!</p>',
'</tpl>',
- '</tpl></p>', {
- isGirl: function(name){
- return name == 'Sara Grace';
- },
- isBaby: function(age){
- return age < 1;
- }
-});
+ '</tpl></p>',
+ {
+ // XTemplate configuration:
+ compiled: true,
+ disableFormats: true,
+ // member functions:
+ isGirl: function(name){
+ return name == 'Sara Grace';
+ },
+ isBaby: function(age){
+ return age < 1;
+ }
+ }
+);
tpl.overwrite(panel.body, data);
-