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// widget_input.ysl2

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widget_desc("Input") {

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    longdesc

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    || 

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    Input widget takes one variable path, and displays current value in

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    optional "value" labeled sub-element. 

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    Click on optional "edit" labeled element opens keypad to edit value.

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    Operation on current value is performed when click on sub-elements with

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    label starting with '=', '+' or '-' sign. Value after sign is used as

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    operand.

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    ||

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    shortdesc > Input field with predefined operation buttons

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    arg name="format" accepts="string" > optional printf-like format 

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    path name="edit" accepts="HMI_INT, HMI_REAL, HMI_STRING" > single variable to edit

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}

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widget_class("Input")

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||

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     on_op_click(opstr) {

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         this.change_hmi_value(0, opstr);

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     }

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     edit_callback(new_val) {

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         this.apply_hmi_value(0, new_val);

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     }

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     is_inhibited = false;

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     alert(msg){

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         this.is_inhibited = true;

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         this.display = msg;

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         setTimeout(() => this.stopalert(), 1000);

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         this.request_animate();

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     }

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     stopalert(){

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         this.is_inhibited = false;

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         this.display = this.last_value;

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         this.request_animate();

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     }

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     overshot(new_val, max) {

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         this.alert("max");

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     }

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     undershot(new_val, min) {

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         this.alert("min");

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     }

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||

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widget_defs("Input") {

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    const "value_elt" optional_labels("value");

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    const "have_value","string-length($value_elt)>0";

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    value "$value_elt";

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    const "edit_elt" optional_labels("edit");

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    const "have_edit","string-length($edit_elt)>0";

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    value "$edit_elt";

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    if "$have_value"

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    |     frequency: 5,

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    |     dispatch: function(value) {

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    if "$have_value or $have_edit" {

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        choose{

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            when "count(arg) = 1" {

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    |         this.last_value = vsprintf("«arg[1]/@value»", [value]);

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            }

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            otherwise {

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    |         this.last_value = value;

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            }

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        }

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    |         if(!this.is_inhibited){

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    |             this.display = this.last_value;

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    if "$have_value" {

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    |             this.request_animate();

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    }

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    |         }

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    }

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    |     },

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    if "$have_value" {

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    |     animate: function(){

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    |         this.value_elt.textContent = String(this.display);

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    |     },

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    }

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    |     init: function() {

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    if "$have_edit" {

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    |         this.edit_elt.onclick = () => edit_value("«path/@value»", "«path/@type»", this, this.last_value);

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        if "$have_value" {

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    |         this.value_elt.style.pointerEvents = "none";

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        }

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    }

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    foreach "$hmi_element/*[regexp:test(@inkscape:label,'^[=+\-].+')]" {

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    |         id("«@id»").onclick = () => this.on_op_click("«func:escape_quotes(@inkscape:label)»");

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    }

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    |     },

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}