I have a problem with image preview
use mac with high sierra
with photoshop cc2014 everything ok works properly
instead in photoshop 2018 I get out error
where am I wrong?
// script
function main(){
inputFolder = Folder.selectDialog("SELECT FOLDER IMAGE:");
var fileList = inputFolder.getFiles(/\.(jpg|png)$/i);
Image.prototype.onDraw = function(){
// "this" is the container; "this.image" is the graphic
if( !this.image ) return;
var WH = this.size,
wh = this.image.size,
k = Math.min(WH[0]/wh[0], WH[1]/wh[1]),xy;
// Resize proportionally:
wh = [k*wh[0],k*wh[1]];
// Center:
xy = [ (WH[0]-wh[0])/2, (WH[1]-wh[1])/2 ];
this.graphics.drawImage(this.image,xy[0],xy[1],wh[0],wh[1]);
WH = wh = xy = null;
}
var win = new Window ("dialog", "PREVIEW");
win.pnl1 = win.add('panel', undefined, undefined, {borderStyle:'black'});
win.pnl1.preferredSize=[400,400];
win.Im1 = win.pnl1.add ("image", undefined,fileList[0]);
win.Im1.size = [400,400];
win.pnl2 = win.add('panel', undefined, undefined, {borderStyle:'black'});
win.pnl2.orientation = "row";
win.pnl2.bu2 = win.pnl2.add('button',[110,10,200,30],'BACK');
win.pnl2.bu1 = win.pnl2.add('button',[10,10,100,30],'NEXT');
var PIC = 0;
win.pnl2.bu1.onClick=function(){
//Next picture
if(PIC == fileList.length -1) return;
PIC++;
win.Im1.image = fileList[PIC];
}
win.pnl2.bu2.onClick=function(){
//Previous
if(PIC == 0 ) return;
PIC--;
win.Im1.image = fileList[PIC];
}
win.show();
}
main();
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Replies
Your first code works well only with .png files
instead if sono.jpg comes out error
// script
// it open little image browser within Photoshop
function brwsr() {
u = undefined, Image.prototype.onDraw = function() {
WH = [(k = Math.min(wh[0] / (WH = this.image.size)[0], wh[1] / WH[1])) * WH[0], k * WH[1]]
xy = [(wh[0] - WH[0]) / 2, (wh[1] - WH[1]) / 2], this.graphics.drawImage(this.image, xy[0], xy[1], WH[0], WH[1])
};
wh=(upr=(win=new Window('dialog', 'PREVIEW')).add('panel', u, u, {borderStyle:'black'})).preferredSize=[400, 400];
(img = upr.add('image', u, fL[0])).size = wh; (btm = win.add('panel', u, u, {borderStyle:'black'})).orientation='row'
p = 0; function IF(v) {return v ? 'if (p) img.image = fL[--p]' : 'if (fL[p + 1]) img.image = fL[++p]'}
obj = {CLOSE: 'win.close()', BACK: IF(true), NEXT: IF(false), OPEN: 'open(File(fL
)), refresh()'}
for(i in obj) eval("btm.add('button', [107, 10, 200, 33], i).onClick = function() {" + obj +"}"); win.show()
}
if ((fL = Folder.selectDialog('SELECT IMAGE\'S FOLDER:').getFiles(/\.(jpg|png)$/i)).length) brwsr()
Run 'Version II' script in CS6 and you will see 
however I'm going to find information in decumentation for you as well:
https://www.ps-scripts.com/viewtopic.php?f=77&t=40429#p169072
I'm sorry I did mistake. I did not mean 'preview', but 'image' 
('preview' was name for 'dialog' in that code - I'm in rush 
)
In case of 'image' documentation states that must be 'PNG', so like for 'iconbutton', but that's not true for both, I used jpg's:
On pages 68-69 (71-72) you will find that author of unofficial documentation also used .jpg: https://indd.adobe.com/view/a0207571-ff5b-4bbf-a540-07079bd21d75
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