Dashboard Studio - Interactions on line charts

[Ho_Wai_Yung]

There a few questions in regards to the Interactions for Dashboard studios.

This is the current code I have:

{
    "drilldown": "true",
    "visualizations": {
        "viz_ar3dmyq9": {
            "type": "splunk.line",
            "dataSources": {
                "primary": "ds_jjp4wUrz"
            },
            "eventHandlers": [
                {
                    "type": "drilldown.setToken",
                    "options": {
                        "tokens": [
                            {
                                "token": "click_time",
                                "key": "row._time.value"
                            }
                        ]
                    }
                },
                {
                    "type": "drilldown.linkToSearch",
                    "options": {
                         "query": "SomeSearchQuery",
                         "earliest": "$click_time$",
                         "latest": "$global_time.latest$",
                         "type": "custom",
                         "newTab": true
}
}
            ],
            "options": {
                "seriesColorsByField": {},
                "dataValuesDisplay": "minmax",
                "y2AxisTitleText": ""
            }
        },
        "viz_leeY0Yzv": {
            "type": "splunk.markdown",
            "options": {
                "markdown": "**Value of Clicked row : $click_time$**",
                "backgroundColor": "#ffffff",
                "fontFamily": "Times New Roman",
                "fontSize": "extraLarge"
            }
        }
    },
    "dataSources": {
        "ds_uHpCvdwq": {
            "type": "ds.search",
            "options": {
                "enableSmartSources": true,
                "query": "someCustomQuery",
                "refresh": "10s",
                "refreshType": "delay"
            },
            "name": "CustomQuery"
        },
        "ds_jjp4wUrz": {
            "type": "ds.search",
            "options": {
                "query": "AnotherCustomQuery",
                "refresh": "10s",
                "refreshType": "delay"
            },
            "name": "CustomQuery2"
        }
    },
    "defaults": {
        "dataSources": {
            "ds.search": {
                "options": {
                    "queryParameters": {
                        "latest": "$global_time.latest$",
                        "earliest": "$global_time.earliest$"
                    }
                }
            }
        }
    },
    "inputs": {
        "input_global_trp": {
            "type": "input.timerange",
            "options": {
                "token": "global_time",
                "defaultValue": "-60m@m,now"
            },
            "title": "Global Time Range"
        }
    },
    "layout": {
        "type": "absolute",
        "options": {
            "width": 1440,
            "height": 960,
            "display": "auto"
        },
        "structure": [
            {
                "item": "viz_ar3dmyq9",
                "type": "block",
                "position": {
                    "x": 0,
                    "y": 0,
                    "w": 1440,
                    "h": 330
                }
            },
            {
                "item": "viz_leeY0Yzv",
                "type": "block",
                "position": {
                    "x": 310,
                    "y": 780,
                    "w": 940,
                    "h": 30
                }
            }
        ],
        "globalInputs": [
            "input_global_trp"
        ]
    },
    "description": "Tracking objects",
    "title": "Info"
}

The line chart maps the data from 'AnotherCustomQuery'  (ds_jjp4wUrz), which is a query returning a chart that gets the max object_times for the 3 objects at one minute intervals:

.... | chart span=1m max(object_time) OVER _time by object

Producing a 3 line chart, each line representing each object.

I can get the time the user clicked on, tokenized in "click_time", but a few puzzles remain:
1. When the user clicks on a object line, how do I get the line's object_name and pass it along to my search query?
2. For the "drilldown.linkToSearch", how can I add 1 minute to the click_time and add it into the latest?
     Is it possible I don't need that range and search at a specific time? 
3. When I open the dashboard, the first click search says "invalid earliest time", but subsequent clicks on the chart says it's working fine. Is there are particular reason why this is happening?

[Ho_Wai_Yung · Accepted solution]

Figured out the solution:

1. I just use $name$ to get the click event object line name.

2. Put latest="+1"

3. Removed all defined tokens and put the actual values into the search.

"eventHandlers": [
    {
        "type": "drilldown.linkToSearch",
        "options": {
             "enableSmartSources": true,
             "query": "... where match(Object,\"$name$\") and match(Object_Time,\"$value$\")\r\n| ...",
             "earliest": "$row._time.value$",
             "latest": "+1m",
             "type": "custom",
             "newTab": true
        }
    }
]

The