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40 lines
1.6 KiB
Plaintext
40 lines
1.6 KiB
Plaintext
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{
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"name": "display_expression",
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"type": "function",
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"description": "Returns the display expression for a given feature in a layer. If called with no parameters, it evaluates the current feature. The expression is evaluated by default.",
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"arguments": [
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{
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"arg": "feature",
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"optional": true,
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"default": "current feature",
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"description": "The feature which should be evaluated."
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},
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{
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"arg": "layer",
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"optional": true,
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"default": "current layer",
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"description": "The layer (or its id or name)."
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},
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{
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"arg": "evaluate",
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"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' function).",
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"optional": true,
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"default": "true"
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}
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],
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"examples": [
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{
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"expression": "display_expression()",
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"returns": "The display expression of the current feature."
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},
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{
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"expression": "display_expression($currentfeature)",
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"returns": "The display expression for a given feature."
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},
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{
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"expression": "display_expression('a_layer_id', $currentfeature, 'False')",
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"returns": "The display expression of the current feature not evaluated."
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}
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]
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}
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