ImageView

A widget to display an image.

Import this type with “const {ImageView} = require('tabris');”

Properties

image

Type: Image

The image to display. Providing the width and height attributes on the image will resize it internally. When no dimensions are given the image will be loaded with its original size. Since the full size image might occupy a lot of memory, it’s recommended to provide exact dimensions.

scaleMode

Type: string, supported values: auto, fit, fill, stretch, none, default: auto

How to scale the image.

fit will scale the image proportionally to fit into the view, possible leaving some empty space at the edges. That is, the image will be displayed as large as possible while being fully contained in the view.
fill will scale the image proportionally to fill the entire view, possibly cutting off parts of the image. That is, the image will be displayed as small as possible while covering the entire view.
auto will scale down the image to fit into the view if it is too large, but it won’t scale up a smaller image.
stretch will resize the image to the actual bounds of the image view.
none will not resize the image at all. The image will be displayed in its original size.
tintColor

iOSAndroid

Type: Color

A color to change the image appearance. All opaque parts of the image will be tinted with the given color. Set to initial to remove the effect.

Events

imageChanged

Fired when the image property has changed.

Event Parameters

target: this The widget the event was fired on.
value: Image The new value of image.

load

Fired when the image loading has finished.

Event Parameters

target: this The widget the event was fired on.
error: boolean Contains the final status of the loading process

scaleModeChanged

Fired when the scaleMode property has changed.

Event Parameters

target: this The widget the event was fired on.
value: string The new value of scaleMode.

tintColorChanged

Fired when the tintColor property has changed.

Event Parameters

target: this The widget the event was fired on.
value: Color The new value of tintColor.

Example

const {ImageView, ui} = require('tabris');
// Display images with different scale modes
createImageView('fit');
createImageView('none');
createImageView('fill');
function createImageView(scaleMode) {
  new ImageView({
    left: 10, top: 'prev() 10', width: 250, height: 100,
    image: 'images/target_200.png',
    background: '#aaaaaa',
    scaleMode: scaleMode
  }).appendTo(ui.contentView);
}

原文:

https://youjingyu.github.io/Tabris-Documention/?folderName=widgets&pageName=ImageView.html