Features

Currently Titanium.UI.ImageView doesn't support the contentMode property so your rendered image will everytime fit your ImageView. This module allows you to specify which behavior your ImageView must have and adds some extra features to improve the user experience. The module currently supports the following APIs:

• Content Mode
• Broken link image fallback
• Loading image placeholder
• Custom HTTP header, useful if the images are protected
• WebP support
• GIF support
• Automatic circle transformation (Android only)

Any PR will be really appreciated!

Get it

You can install it directly via gittio using

$ gittio install av.imageview

or manually by cloning this repository or directly by downloading the latest packaged module version here.

Now, follow these steps to install the packaged version of this module into your application.

Usage

You can easily use this module via Alloy or in a classic way.

Alloy

Here is how you can use the extended-imageview directly in alloy:

    <Alloy>
        <Window>
            <View class="container">
                <ImageView module="av.imageview" />
            </View>
        </Window>
    </Alloy>

and inside the related TSS you can do

    "ImageView": {
        width: 100,
        height: 100,
        image: "https://static.pexels.com/photos/27954/pexels-photo-27954.jpg",
    }

ListView ItemTemplate

To include this module in a ListItemTemplate, you have to do:

    <ImageView ns="AvImageview" />

where AvImageview is a variable declared in alloy.js like this:

    var AvImageview = require("av.imageview");

    //and to use contentmodes constants via alloy
    Alloy.Globals.CONTENT_MODE_FIT = AvImageview.CONTENT_MODE_ASPECT_FIT;
    Alloy.Globals.CONTENT_MODE_FILL = AvImageview.CONTENT_MODE_ASPECT_FILL;

    //If you need to access to protected images you can define which request header fields the module has to use for every request
    Alloy.Globals.REQUEST_HEADERS = {
        'Authorization': 'place or assign dinamically your logged user access token',
        'Another HTTP header field': 'with its value'
    };

A complete example can be:

    <ListView id="Images" defaultItemTemplate="template">
        <Templates>
            <ItemTemplate name="template" height="160">
                <ImageView ns="AvImageview" bindId="photo" height="160" width="Ti.UI.FILL" loadingIndicator="true" contentMode="Alloy.Globals.CONTENT_MODE_FILL" requestHeader="Alloy.Globals.REQUEST_HEADERS" />
            </ItemTemplate>
        </Templates>
        <ListSection>
            <ListItem template="template" photo:image="http://www.nationalgeographic.com/content/dam/photography/photos/000/060/6018.ngsversion.1467254523217.adapt.1900.1.jpg"></ListItem>
            <ListItem template="template" photo:image="http://www.italiangoodnews.com/wp-content/uploads/2014/11/italy-04.jpg"></ListItem>
            <ListItem template="template" photo:image="https://walkingtree.org/wp-content/uploads/2015/09/Elia-Locardi-Whispers-From-The-Past-The-Colosseum-Rome-Italy-1280-WM.jpg"></ListItem>
            <ListItem template="template" photo:image="http://wp-admin.goldenbird-italy.com/wp-content/uploads/2015/07/italy_2631046a.jpg"></ListItem>
            <ListItem template="template" photo:image="http://www.travelviaitaly.com/wp-content/uploads/2015/12/Rome-Italy.jpg"></ListItem>
        </ListSection>
    </ListView>

Classic

You can instantiate an extended-imageview in this way:

    require('av.imageview').createImageView({
        width: 100,
        height: 100,
        image: "https://static.pexels.com/photos/27954/pexels-photo-27954.jpg",
        requestHeader: {
            'Authorization': 'Bearer your_access_token_here'
        }
    });

API

All Titanium.UI.View properties and methods are supported.

About the enabled contentMode, you can learn more about this here.

Extra properties

Property	Description	Note
contentMode	Set the ImageView content mode	Supported content modes are listed in a next section.
defaultImage	Local image to display when the image download is in progress
brokenLinkImage	Local image to display when the given link doesn't work or the image doesn't exists
loadingIndicator	Enable or disable the activity indicator when the download is in progress	true by default
loadingIndicatorColor	change the loading indicator color
requestHeader	An object used to define extra http request header fields
timeout	Set timeout for requests, in milliseconds
handleCookies	Enable cookie handling for remote images
enableMemoryCache	Enable or disable the memory cache mechanism	true by default and Android only, for iOS have a look to module properties here
rounded	Enable or disable the circle transformation that automatically render the image as a perfect circle	Android only
dontAnimate	Disable the fadeIn	Android only

Extra methods

Method	Description	Note
setContentMode	Set the contentMode property
setLoadingIndicator	Set the loadingIndicator property
setLoadingIndicatorColor	Set the loadingIndicatorColor property
setDefaultImage	Set the defaultImage property
setBrokenLinkImage	Set the brokenLinkImage property
setClipsToBound	Set the clipToBounds property	iOS only
setRequestHeader	Set the requestHeader property
setRounded	Set the rounded property	Android only
setTimeout	Set timeout for requests, in milliseconds
setSignature	Add a signature to the cache string	Android only
getContentMode	Get the value of contentMode property
getLoadingIndicator	Get the value of loadingIndicator property
getLoadingIndicatorColor	Get the value of loadingIndicatorColor property
getDefaultImage	Get the value of defaultImage property
getBrokenLinkImage	Get the value of brokenLinkImage property
getClipsToBound	Get the value of clipToBounds property	iOS only
getRequestHeader	Get the requestHeader property
getRounded	Get the rounded property	Android only
getTimeout	Get current timeout of requests, in milliseconds

Events

Event	Description
load	Fired when the current image was successfully downloaded
error	Fired when the image was not fetched

Supported Content Modes

Here is a list of supported content modes:

Android and iOS

• CONTENT_MODE_ASPECT_FIT
• CONTENT_MODE_ASPECT_FILL

iOS only

• CONTENT_MODE_SCALE_TO_FIT
• CONTENT_MODE_REDRAW
• CONTENT_MODE_CENTER
• CONTENT_MODE_TOP
• CONTENT_MODE_BOTTOM
• CONTENT_MODE_LEFT
• CONTENT_MODE_RIGHT
• CONTENT_MODE_TOP_LEFT
• CONTENT_MODE_TOP_RIGHT
• CONTENT_MODE_BOTTOM_LEFT
• CONTENT_MODE_BOTTOM_RIGHT

Global properties (iOS only)

Property	Description	Note
shouldCacheImagesInMemory	Specify if memory will be used to cache images	true by default
shouldDecompressImages	Specify if image decompression must be enabled or not	true by default
maxCacheAge	The maximum length of time to keep an image in the cache, in seconds	int
maxCacheSize	The maximum size of the cache, in bytes	int

Donate

If you enjoy this module, feel free to contribute with your PR or donate :-)

Credits

Anyone who contributes to the module enhancement!

@rs for the amazing SDWebImage library. Currently lib version used: 4.1.0.

@bumptech for the amazing Glide library. Currently lib version used: 3.8.0.