QGIS/resources/function_help/json/maptip

{
	"name": "maptip",
	"type": "function",
        "description": "Returns the maptip for a given feature in a layer. If called with no parameters, it evaluates the current feature. The maptip is evaluated by default.",
        "arguments": [
            {
                    "arg": "feature",
                    "optional": true,
                    "default": "current feature",
                    "description": "The feature which should be evaluated."
            },
            {
                    "arg": "layer",
                    "optional": true,
                    "default": "current layer",
                    "description": "The layer (or its id or name)."
            },
            {
                    "arg": "evaluate",
                    "description": "If the expression must be evaluated. If false, the expression will be returned as a string literal only (which could potentially be later evaluated using the 'eval_template' function).",
                    "optional": true,
                    "default": "true"
            }
	],
        "examples": [
                {
                        "expression": "maptip()",
                        "returns": "The maptip of the current feature."
		},
                {
                        "expression": "maptip($currentFeature)",
                        "returns": "The maptip of the current feature."
                },
		{
			"expression": "maptip('a_layer_id', $currentFeature, 'False')",
                        "returns": "The maptip of the current feature not evaluated."
		}
	]
}