nativescript-parallax/utilities.js

NativeScript Parallax View Plugin.

"use strict";
exports.__esModule = true;
var app = require("application");
var Platform = require("platform");
var label_1 = require("ui/label");
var stack_layout_1 = require("ui/layouts/stack-layout");
var color_1 = require("color");
var ParallaxUtilities = (function () {
    function ParallaxUtilities() {
    }
    ParallaxUtilities.setMinimumHeight = function (contentView, anchoredRow, minHeight, includesAnchored) {
        if (includesAnchored) {
            minHeight = minHeight - (anchoredRow.getMeasuredHeight() * 0.9);
        }
        contentView.minHeight = minHeight;
    };
    ParallaxUtilities.getMinimumHeights = function () {
        var height1 = Platform.screen.mainScreen.heightDIPs;
        var height2 = Platform.screen.mainScreen.widthDIPs;
        if (height1 > height2) {
            return {
                portrait: height1,
                landscape: height2
            };
        }
        else {
            return {
                portrait: height2,
                landscape: height1
            };
        }
    };
    ParallaxUtilities.addDropShadow = function (translateY, width) {
        var wrapper = new stack_layout_1.StackLayout();
        wrapper.width = width;
        wrapper.height = 3;
        wrapper.translateY = translateY;
        wrapper.addChild(this.shadowView(0.4, width));
        wrapper.addChild(this.shadowView(0.2, width));
        wrapper.addChild(this.shadowView(0.05, width));
        return wrapper;
    };
    ParallaxUtilities.shadowView = function (opacity, width) {
        var shadowRow = new stack_layout_1.StackLayout();
        shadowRow.backgroundColor = new color_1.Color('black');
        shadowRow.opacity = opacity;
        shadowRow.height = 1;
        return shadowRow;
    };
    ParallaxUtilities.fadeViews = function (topHeight, verticalOffset, viewsToFade, topOpacity) {
        if (verticalOffset < topHeight) {
            topOpacity = parseFloat((1 - (verticalOffset * 0.01)).toString());
            if (topOpacity > 0 && topOpacity <= 1) {
                for (var v = 0; v < viewsToFade.length; v++) {
                    var view = viewsToFade[v];
                    view.opacity = topOpacity;
                }
            }
        }
    };
    ParallaxUtilities.getAnchoredTopHeight = function (topHeight, verticalOffset) {
        var translateY;
        if (verticalOffset <= topHeight) {
            translateY = topHeight - (verticalOffset * 2);
            if (translateY > topHeight) {
                translateY = topHeight;
            }
            if (app.android) {
                translateY = translateY - 5;
            }
        }
        else {
            translateY = 0;
        }
        if (translateY < 0) {
            translateY = 0;
        }
        return translateY;
    };
    ParallaxUtilities.getTopViewHeight = function (topHeight, verticalOffset) {
        if ((topHeight - verticalOffset) >= 0) {
            return topHeight - verticalOffset;
        }
        else {
            return 0;
        }
    };
    ParallaxUtilities.displayDevWarning = function (parent, message) {
        var viewsToCollapse = [];
        for (var _i = 2; _i < arguments.length; _i++) {
            viewsToCollapse[_i - 2] = arguments[_i];
        }
        var warningText = new label_1.Label();
        warningText.text = message;
        warningText.color = new color_1.Color('red');
        warningText.textWrap = true;
        warningText.translateY = 50;
        parent.addChild(warningText);
        viewsToCollapse.forEach(function (view) {
            if (view != null) {
                view.visibility = 'collapse';
            }
        });
    };
    ParallaxUtilities.pluckViews = function (parent) {
        var returnViews = [];
        parent.eachLayoutChild(function (child) {
            returnViews.push(child);
        });
        parent.removeChildren();
        return returnViews;
    };
    ParallaxUtilities.containsCssClass = function (view, className) {
        var cssClasses = view.className.split(' ');
        return cssClasses.indexOf(className) > -1 ? true : false;
    };
    return ParallaxUtilities;
}());
exports.ParallaxUtilities = ParallaxUtilities;
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