Trim Paths Sliders

(function (thisObj) {
    buildUI(thisObj);

    //Build the window
    function buildUI(thisObj) {
        var window = (thisObj instanceof Panel) ? thisObj : new Window("palette", "script", undefined, {
            resizeable: true
        });

        //Add elements to the window
        window.alignChildren = "center";
        window.orientation = "column";
        var mainGroup = window.add("group");
        mainGroup.alignChildren = ("center");
        mainGroup.orientation = ("row");
        var staticTextGroup = mainGroup.add("group");
        staticTextGroup.alignChildren = ("left");
        staticTextGroup.orientation = ("column");
        staticTextGroup.add ("statictext", undefined, "In:");
        staticTextGroup.add ("statictext", undefined, "Out:");
        var sliderGroup = mainGroup.add("group");
        sliderGroup.orientation = ("column");
        var inSlider = sliderGroup.add("slider {minValue: 0, maxValue: 100, value: 0}");
        var outSlider = sliderGroup.add("slider {minValue: 0, maxValue: 100, value: 100}");
        var editTextGroup = mainGroup.add("group");
        editTextGroup.orientation = ("column");
        var inEditText = editTextGroup.add("edittext {text: 0, characters: 3, justify: 'center'}");
        var outEditText = editTextGroup.add("edittext {text: 100, characters: 3, justify: 'center'}");
        var addTrimButton = window.add("button", undefined, "Add Trim Paths");

        //Slider functions
        inSlider.onChanging = function () {
            inEditText.text = Math.round(inSlider.value);
        }

        inSlider.onChange = function () {
             var comp = app.project.activeItem;
                    if (!comp || !(comp instanceof CompItem)){
                        alert("No composition is selected. Please select a composition and try again.");
                        return;
                    }
                    for(var i = 0; i < comp.selectedLayers.length; i++) {
                         var myShape = app.project.activeItem.selectedLayers[i];
                         var timePosition = app.project.activeItem.time;
                         myShape.property("ADBE Root Vectors Group").property("ADBE Vector Filter - Trim").property("ADBE Vector Trim Start").setValueAtTime(timePosition, inSlider.value);
                    }
        }

        outSlider.onChanging = function() {
            outEditText.text = Math.round(outSlider.value);
        }

        outEditText.onChange = function () {
             var comp = app.project.activeItem;
                    if (!comp || !(comp instanceof CompItem)){
                        alert("No composition is selected. Please select a composition and try again.");
                        return;
                    }
                    for(var i = 0; i < comp.selectedLayers.length; i++) {
                         var myShape = app.project.activeItem.selectedLayers[i];
                         var timePosition = app.project.activeItem.time;
                         myShape.property("ADBE Root Vectors Group").property("ADBE Vector Filter - Trim").property("ADBE Vector Trim End").setValueAtTime(timePosition, outSlider.value);
                    }
        }

        //Editable text functions
        inEditText.onChange = function() {
            inSlider.value = inEditText.text;
            var comp = app.project.activeItem;
                    if (!comp || !(comp instanceof CompItem)){
                        alert("No composition is selected. Please select a composition and try again.");
                        return;
                    }
                    for(var i = 0; i < comp.selectedLayers.length; i++) {
                         var myShape = app.project.activeItem.selectedLayers[i];
                         var timePosition = app.project.activeItem.time;
                         myShape.property("ADBE Root Vectors Group").property("ADBE Vector Filter - Trim").property("ADBE Vector Trim Start").setValueAtTime(timePosition, inSlider.value);
                    }
        }

        outEditText.onChange = function() {
            outSlider.value = outEditText.text;
            var comp = app.project.activeItem;
                    if (!comp || !(comp instanceof CompItem)){
                        alert("No composition is selected. Please select a composition and try again.");
                        return;
                    }
                    for(var i = 0; i < comp.selectedLayers.length; i++) {
                         var myShape = app.project.activeItem.selectedLayers[i];
                         var timePosition = app.project.activeItem.time;
                         myShape.property("ADBE Root Vectors Group").property("ADBE Vector Filter - Trim").property("ADBE Vector Trim End").setValueAtTime(timePosition, outSlider.value);
                    }
        }

        //Button function
        addTrimButton.onClick = function() {
            var comp = app.project.activeItem;
                    if (!comp || !(comp instanceof CompItem)){
                        alert("No composition is selected. Please select a composition and try again.");
                        return;
                    }

                for(var i = 0; i < comp.selectedLayers.length; i++) {
                        var shapeLayers = app.project.activeItem.selectedLayers[i];
                        try{shapeLayers.property("ADBE Root Vectors Group").addProperty("ADBE Vector Filter - Trim");}catch(error){return;}
                        var timePosition = app.project.activeItem.time;
                        shapeLayers.property("ADBE Root Vectors Group").property("ADBE Vector Filter - Trim").property("ADBE Vector Trim Start").setValueAtTime(timePosition, myPanel.grp.trimPaths.sliders.startSlider.value);
                        shapeLayers.property("ADBE Root Vectors Group").property("ADBE Vector Filter - Trim").property("ADBE Vector Trim End").setValueAtTime(timePosition, myPanel.grp.trimPaths.sliders.endSlider.value);
                    }
                }

        //Adjust window on resize
        window.onResizing = window.onResize = function () {
            this.layout.resize();
        };

        //Makes sure that window is displayed to the user
        if (window instanceof Window) {
            window.center();
            window.show();
        } else {
            window.layout.layout(true);
            window.layout.resize();
        }
    }
})(this);