Widget Input Parameters

When a widget is being started, it receives a special Data Table on its input. This Data Table is called Widget Input Parameters Table.

If a widget is started directly from a Iotellect Client (by manually executing its Launch Action), there is no way to pass any parameters to it.

However, widgets can be launched from inside another widgets. When a widget wants to launch another widget, it executes a binding which target is set to Launch Widget action of the widget to start. This binding's expression should result to a Data Table, and this table will be passed to a newly opening widget as its Widget Input Parameters Table.

So, to recap, here is the necessary sequence for passing parameters between widgets:

• In originating widget, create a binding which target points to a launch action of another widget, e.g. users.admin.widgets.voltageChart:launch!.
• Make sure that expression of the above binding creates/fetches and returns a Data Table object.

Accessing input parameters from within a widget is very easy. The Widget Input Parameters Table is always a default table during widget binding expression evaluation. Thus, if this table has field called mode, this parameter can be referred from any binding's expression by using {mode} reference.

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