Events mechanism
Tiles emit events, they also trap events. A Dashboard also traps particular events.
Events are defined in the exec result of a tile, events are emitted when parsing done.
Tiles register handlers on particular tags and event's type. You can use regular expression.
Sample
{
'title' 'My Dashboard With events'
'tiles' [
{
'type' 'display'
'title' 'Tile A'
'w' 2 'h' 1 'x' 2 'y' 0
'data' ''
'options' { 'eventHandler' 'type=(data|style),tag=tes.*' } // Events handler
}
{
'type' 'button'
'title' 'Tile B'
'options' { 'button' { 'label' 'Click me' } }
'w' 2 'h' 1 'x' 0 'y' 0
'macro' <%
{
'data' <%
RAND 100 * ROUND 'v' STORE // compute a random value
{
'data' ''
'events' [
{ 'tags' [ 'test' ] 'type' 'data' 'value' $v } // Event emitter
]
}
%>
}
%>
}
]
}
Event's types
data
| Name | Type | Description |
|---|---|---|
| type | data | |
| tags | string[] | Targets |
| value | GTS, GTS[], string, number, custom data | The event emitter send data to the receiver, could be any kind of data including single value, GTS list or complex data. The receiver treat this event as an execution result. |
{ 'tags' [ 'random' ] 'type' 'data' 'value' 42 } }
style
| Name | Type | Description |
|---|---|---|
| type | style | |
| tags | string[] | Targets |
| value | {key:sting, value:string} | Send CSS style to be applied by the receiver with a CSS selector as key |
{
'tags' [ 'foo' ]
'type' 'style'
'value' {
'.discovery-tile' 'background-color: red !important;'
'.value' 'color: #ffffff;'
}
}
zoom
Only relevant for line, area, step, annotation and bar charts.
| Name | Type | Description |
|---|---|---|
| type | zoom | |
| tags | string[] | Targets |
{
'title' 'My Dashboard with zoom sync'
'tiles' [
{
'type' 'bar' 'x' 0 'y' 0 'w' 6 'h' 1
'options' { 'eventHandler' 'type=zoom,tag=chart1' }
'macro' <%
NOW 'now' STORE
[ 1 4 <% DROP NEWGTS 'g' STORE
1 10 <% 'ts' STORE $g $now $ts STU * - NaN NaN NaN RAND ADDVALUE DROP %> FOR
$g
%> FOR ] 'data' STORE
{
'data' $data
'events' [
{ 'tags' [ 'chart2' ] 'type' 'zoom' }
]
}
%>
}
{
'type' 'line' 'x' 6 'y' 0 'w' 6 'h' 1
'options' { 'eventHandler' 'type=zoom,tag=chart2' }
'macro' <%
NOW 'now' STORE
[ 1 4 <% DROP NEWGTS 'g' STORE
1 10 <% 'ts' STORE $g $now $ts STU * - NaN NaN NaN RAND ADDVALUE DROP %> FOR
$g
%> FOR ] 'data' STORE
{
'data' $data
'events' [
{ 'tags' [ 'chart1' ] 'type' 'zoom' }
]
}
%>
}
]
}
xpath
Only relevant for SVG targets.
| Name | Type | Description |
|---|---|---|
| type | xpath | |
| tags | string[] | Targets |
| value | {key:sting, value:string}, string | Attributes map or XML string for node replacement |
| selector | string | XPath selector starting at SVG (ie: /svg/g/g[2]/ellipse[3] ) |
If value is a string, the node targeted by the XPath selector is replaced by the XML provided in value.
If value is a map, the attributes of the node targeted by the XPath selector will be overridden with the values
provided in the map. The key of the map must correspond to an attribute's name.
{ // Node replacement
'tags' [ 'svg' ]
'type' 'xpath'
'value' '<' 'ellipse rx="15" ry="18" style="stroke:none;fill: red;" cx="50" cy="200"' + '/>' +
'selector' '/svg/g/g[2]/ellipse[1]'
}
{ // Attributes replacement
'tags' [ 'svg' ]
'type' 'xpath'
'value' { 'rx' $v 'ry' $v }
'selector' '/svg/g/g[2]/ellipse[3]'
}
popup
The only target is the Dashboard itself, you must declare handlers at the dashboard level.
Dashboard Event handler declaration:
{
'title' 'My Dashboard With events'
'options' { 'eventHandler' 'type=popup,tag=foo' }
'tiles' [ ... ]
}
When event is trapped, a popup opens with a content.
| Name | Type | Description |
|---|---|---|
| type | popup | |
| tags | string[] | Targets |
| value | Tile, Dashboard | Open a Tile or a complete dashboard in a popup. |
{
'tags' [ 'foo' ]
'type' 'popup'
'value' { // a Tile
'type' 'area'
'data' [
NEWGTS 'data' RENAME 0.0 'v' STORE
1 500 <% 1 s * NOW SWAP - NaN NaN NaN $v RAND 0.5 - + DUP 'v' STORE ADDVALUE %> FOR
]
}
}
variable
You can inject variables into macro defined in Tiles and modify value with an event. But variables must be declared at
the Dashboard level with an initial value.
| Name | Type | Description |
|---|---|---|
| type | variable | |
| tags | string[] | Targets |
| value | any | New value for this variable |
| selector | string | Variable's name |
<discovery-dashboard url="https://sandbox.senx.io/api/v0/exec" dashboard-title="Test">
{
'title' 'My Dashboard With events'
'vars' {
'myVar' 42
}
'tiles' [
{
'type' 'input:text'
'title' 'Input emitter'
'options' {
'button' { 'label' 'Send' }
}
'w' 2 'h' 1 'x' 0 'y' 0
'macro' <% { 'data' $myVar 'events' [ { 'tags' [ 'random' ] 'type' 'variable' 'selector' 'myVar' } ] } %>
}
{
'type' 'display'
'title' 'Event var receiver'
'w' 2 'h' 1 'x' 2 'y' 0
'macro' <% $myVar %>
'options' { 'eventHandler' 'type=(variable),tag=random' }
}
]
}
</discovery-dashboard>
Next step: Tips & tricks