npm package: @hreimer/angular-image-viewer
Description: A configurable Angular image viewer component, compatible with Angular 11.x+
Author: Heinrich Reimer
Latest version: 0.14.1


# Angular Image Viewer

A configurable Angular image viewer component, compatible with Angular 11.x+ 

## Features:
 * Compatible with Angular 11.x+
 * Configurable
 * Rotate image
 * Zoom image
 * Drag to move image
 * Toggle Full Screen mode
 * Reset Image after rotating/zooming/dragging

## Install

``` npm install @hreimer/angular-image-viewer ```

Note: Refer to the official links how to set-up your app if you want to use FontAwesome Icons (https://github.com/FortAwesome/angular-fontawesome) or Material Icons (https://material.angular.io/guide/getting-started).

## Set up

To use default configuration, simply import the ImageViewerModule into your module, like so:

```javascript
import { AngularImageViewerModule } from "@hreimer/angular-image-viewer";

@NgModule({
  //...
  imports: [
    //...
    AngularImageViewerModule
  ],
  //...
})
```

Then, add the component to your template, providing an array of image URLs. You can also optionally add an index, to indicate which image should be shown first. The default will be the first item in the array.

```html
<angular-image-viewer  [src]="images" [(index)]="imageIndex"></angular-image-viewer>
```

By default, the image viewer will fill its container. If you wish to restrict the size, simply place it within a div, and set the size constraints on the div.

---

## Configuration

Configuration can be provided at the module level (by passing the object as an argument to `forRoot()`, or at the component level, by passing it as the `config` input. Any configuration provided at the component level will override that which is set at the module level.

The configuration object is structured as below. All values are optional, and if omitted, the default value shown below will be used.

```javascript
{
  btnContainerClass: '',            // The CSS class(es) to be applied to the button container
  btnClass: 'default',              // The CSS class(es) that will be applied to the buttons e.g. default is needed for FontAwesome icons, while not needed for Material Icons
  btnSubClass: 'material-icons',    // The CSS class(es) that will be applied to span elements inside material buttons (a Elements)
  zoomFactor: 0.1,                  // The amount that the scale will be increased by
  containerBackgroundColor: '#ccc', // The color to use for the background. This can provided in hex, or rgb(a).
  wheelZoom: true,                  // If true, the mouse wheel can be used to zoom in
  allowFullscreen: true,            // If true, the fullscreen button will be shown, allowing the user to enter fullscreen mode
  allowKeyboardNavigation: true,    // If true, the left / right arrow keys can be used for navigation
  btnShow: {                        // Control which icons should be visible                
    zoomIn: true,
    zoomOut: true,
    rotateClockwise: true,
    rotateCounterClockwise: true,
    next: true,
    prev: true,
    reset: true
  },
  btnIcons: {                       // The icon classes that will apply to the buttons. By default, font-awesome is used.
    zoomIn: {
      classes: 'fas fa-plus',        // this property will be used for FontAwesome and other libraries to set the icons via the classes - choose one: classes or text
      text: 'zoom_in'               // this property will be used for Material-Icons and similar libraries to set the icons via the text
    },
    zoomOut: {
      classes: 'fas fa-minus',
      text: 'zoom_out'
    },
    rotateClockwise:  {
      classes: 'fas fa-repeat',
      text: 'rotate_right'
    },
    rotateCounterClockwise:  {
      classes: 'fas fa-undo',
      text: 'rotate_left'
    },
    next:  {
      classes: 'fas fa-arrow-right',
      text: 'arrow_right'
    },
    prev:  {
      classes: 'fas fa-arrow-left',
      text: 'arrow_left'
    },
    fullscreen:  {
      classes: 'fas fa-arrows-alt',
      text: 'fullscreen'
    },
    reset:  {
      classes: 'fas fa-undo',
      text: 'restore'
    }
  }
};
```

To add additional buttons use the following 

```html 
<angular-image-viewer [src]="images" 
                  [config]="{
                    customBtns: [
                      {
                        name: 'link',
                        icon: {
                          classes: 'fas fa-paperclip',
                          text: 'link'
                        }
                      }
                    ]
                  }"
                  (customImageEvent)="handleEvent($event)">
</angular-image-viewer>
```

```javascript
handleEvent(event: customImageEvent) {
    console.log(`${event.name} has been clicked on img ${event.imageIndex + 1}`);

    switch (event.name) {
      case 'print':
        console.log('run print logic');
        break;
    }
}
```

Note: This package builts on the idea from angular-x-image-viewer (https://github.com/deepakgonda/angular-image-viewer) and adds support for Material Icons as well as introduces a Reset Button and structures the buttons horizontally in another customisable container.