svghmi/widget_back.ysl2
author Edouard Tisserant <edouard.tisserant@gmail.com>
Wed, 30 Jun 2021 15:51:59 +0200
branchsvghmi
changeset 3267 5f20f391ae31
parent 3241 fe945f1f48b7
child 3653 d5ff60e906b0
permissions -rw-r--r--
SVGHMI: Prepare accepting multiple clients on multiple HMI: Use POULibrary new capability to add variables to PLC Configuration. Now heartbeat and HMI tree root are added by the library part of SVGHMI, and not by each instance.
// widget_back.ysl2

widget_desc("Back") {
    longdesc
    ||
    Back widget brings focus back to previous page in history when clicked.
    ||

    shortdesc > Jump to previous page
}

// TODO: use es6
widget_class("Back")
    ||
        on_click(evt) {
            if(jump_history.length > 1){
               jump_history.pop();
               let [page_name, index] = jump_history.pop();
               switch_page(page_name, index);
            }
        }
        init() {
            this.element.setAttribute("onclick", "hmi_widgets['"+this.element_id+"'].on_click(evt)");
        }
    ||