Difference between revisions of "Template Displays"

Revision as of 07:54, 16 January 2020 (view source) SNC (Talk | contribs) (Created page with "<div class="imgGlyph24 imgConcept"></div> Rather than making a set of Displays that are identical in except for the data they contain, you can implement a template mechan...")		Revision as of 08:16, 16 January 2020 (view source) SNC (Talk | contribs) Newer edit →
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−	<div class="imgGlyph24 imgConcept"></div>&nbsp;Rather than making a set of Displays that are identical in except for the data they contain, you can implement a template mechanism to pop different data sets into the display dynamically (typically from a drop down list of data choices).	+	<div class="imgGlyph24 imgIdea"></div>&nbsp;Rather than making a set of Displays that are identical in except for the data they contain, you can implement a template mechanism to pop different data sets into the display dynamically (typically from a drop down list of data choices). For example, you might want to show the same 7 employment categories for 10 different MSAs, and rather than a different display for each MSA, a single template will let you select an MSA from a drop down list and see it swapped in.
		+	<br>
		+	<div class="imgGlyph24 imgNote"></div>&nbsp;Skills required for this technique:
		+	* HTML
		+	* Javascript
		+	* dataZoa Grouplists
−	<div class="imgGlyph24 imgConcept"></div>&nbsp;Template displays are when a dataZoa Display is designed somewhat generically (typically with regards to row labels) and for which the datasets used is swapped at display time. This is accomplished by providing a target dataset to use in the form of a GroupList name within the same account and via the glname argument of the embedded display's src attribute.
	<br>		<br>
		+	<div class="imgGlyph24 imgConcept"></div>&nbsp;Templatiung of displays combines three concepts:
		+	* Make several dataZoa Grouplists that contain conceptually and structurally similar data that vary in one particular aspect.  For example, you might make 10 Grouplists of the same 7 employment statistics for different MSAs.
		+	* Build a Table in the usual way using one the Grouplists.
		+	* Embed the Table on your webpage in the usual way.
		+	* Implement an HTML <nowiki><select></nowiki> (aka "drop down") list with options for each of the geographies that have the corresponding Grouplist as their values.
		+	* Add the Javascript <i>UpdateFrame</i> function below to your webpage.
		+	* Add an "onchange" function to the <nowiki><select></nowiki> that will call UpdateFrame as described in its comments <br>
	Templates work with any display type, but in this discussion we will just refer to a dataZoa Table Display.		Templates work with any display type, but in this discussion we will just refer to a dataZoa Table Display.
	<br>		<br>

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Revision as of 08:16, 16 January 2020

 Rather than making a set of Displays that are identical in except for the data they contain, you can implement a template mechanism to pop different data sets into the display dynamically (typically from a drop down list of data choices). For example, you might want to show the same 7 employment categories for 10 different MSAs, and rather than a different display for each MSA, a single template will let you select an MSA from a drop down list and see it swapped in.

 Skills required for this technique:

• HTML
• Javascript
• dataZoa Grouplists

 Templatiung of displays combines three concepts:

• Make several dataZoa Grouplists that contain conceptually and structurally similar data that vary in one particular aspect. For example, you might make 10 Grouplists of the same 7 employment statistics for different MSAs.
• Build a Table in the usual way using one the Grouplists.
• Embed the Table on your webpage in the usual way.
• Implement an HTML <select> (aka "drop down") list with options for each of the geographies that have the corresponding Grouplist as their values.
• Add the Javascript UpdateFrame function below to your webpage.
• Add an "onchange" function to the <select> that will call UpdateFrame as described in its comments
  

Templates work with any display type, but in this discussion we will just refer to a dataZoa Table Display.
To begin, make a table specifically for your app which contains all the data needed and then use AJAX to fetch it.

 Some Advantges:

• You can mark the row (series) labels to easily identify their data
• Label knockouts are available
• Just one fetch for multiple series
• The displays are server-cached for speed
• A GroupList parameter (glname=... on a table gives access to multiple datasets
• A LatestValues display gives you current values, prior values and/or (%) changes

 Remember:

• Use jQuery (or similar library) to parse the structured classes in the display and get the data values
• There is a limit of 50 points of historical data per series for tables.