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// widget_button.ysl2

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template "widget[@type='Button']", mode="widget_class"

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    ||

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    class ButtonWidget extends Widget{

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        frequency = 5;

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        state = 0;

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        active_style = undefined;

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        inactive_style = undefined;

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         on_mouse_down(evt) {

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             if (this.active_style && this.inactive_style) {

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                 this.active_elt.setAttribute("style", this.active_style);

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                 this.inactive_elt.setAttribute("style", "display:none");

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             }

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             this.apply_hmi_value(0, 1);

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         }

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         on_mouse_up(evt) {

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             if (this.active_style && this.inactive_style) {

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                 this.active_elt.setAttribute("style", "display:none");

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                 this.inactive_elt.setAttribute("style", this.inactive_style);

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             }

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             this.apply_hmi_value(0, 0);

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         }

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         init() {

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            this.active_style = this.active_elt ? this.active_elt.style.cssText : undefined;

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            this.inactive_style = this.inactive_elt ? this.inactive_elt.style.cssText : undefined;

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            if (this.active_style && this.inactive_style) {

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                this.active_elt.setAttribute("style", "display:none");

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                this.inactive_elt.setAttribute("style", this.inactive_style);

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            }

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            this.element.setAttribute("onmousedown", "hmi_widgets["+this.element_id+"].on_mouse_down(evt)");

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            this.element.setAttribute("onmouseup", "hmi_widgets["+this.element_id+"].on_mouse_up(evt)");

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         }

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    }

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    ||

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template "widget[@type='Button']", mode="widget_defs" {

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    param "hmi_element";

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    optional_labels("active inactive");

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    |,

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}