Create a image matrix from files in InDesign

image_matrix.jsx

// image_matrix.jsx
// creates a matrix of images ;)
// Copyright (c)  2012 
// Fabian "fabiantheblind" Morón Zirfas  
// Permission is hereby granted, free of charge, to any 
// person obtaining a copy of this software and associated
// documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights 
// to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to  permit persons to 
// whom the Software is furnished to do so, subject to 
// the following conditions:  
// The above copyright notice and this permission notice
// shall be included in all copies or substantial portions of the Software.  
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTIO
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  

// see also http://www.opensource.org/licenses/mit-license.php
 
{ // START SCRIPT

main(); // you need a function to be able to cancel a script

function main(){ // all is in here

var w = 25; // the image sizes
var allImages = loadFiles("*.jpg"); // opens a prompt and lets the user choose a folder
if(allImages == null) return; // if that what the function returns null is - cancel

var pw = Math.round(Math.sqrt(allImages.length)) * w + (w*2); // this will hold the page width
var ph = pw;
// THIS IS THE ESSENTIAL PART
// if the rounded value is not the same as the value
// we have a float. so we must add another row for images
if(Math.round(Math.sqrt(allImages.length)) != Math.sqrt(allImages.length)){
        ph = pw + w;
        }

var doc = app.documents.add(); //build a basic document
doc.documentPreferences.pageWidth = pw; // set the width
doc.documentPreferences.pageHeight = ph; // set the height
var page = doc.pages.item(0); // finally - get the first page

var y = w; // the upper left corner
var x = w; // the upper left corner

for(var i = 0; i < allImages.length;i++){ // loop thru all images

var rect = page.rectangles.add({geometricBounds:[y,x,y + w,x + w]}); // add a rectangle to the page
rect.place(allImages[i] ); // place the image
    rect.fit(FitOptions.FILL_PROPORTIONALLY); // fit it to the frame
    rect.fit(FitOptions.CENTER_CONTENT); // fit it to the frame
    x +=w; // increase x by an image width

if(x >= pw - (w)){ // if x is the width minus an image width
        x = w; // reset x
        y+= w; // and increment y by an image width
        }; //end increase x and y conditional

    };//close allImages loop

};// end main function

function loadFiles(type){ // the function that loads the files

var theFolder = Folder.selectDialog ("Choose the Folder");// user select a folder

if(!theFolder){ // if the folder is not a folder cancel the script
	return; // this cancels the whole function image_loadFiles
		}; // end folder check

var allImages = theFolder.getFiles(type);// get the files by type
if((allImages.length < 1)||(allImages == null) ){// again if check if there are images
	alert("There are no images of the type: " + type);// hm something went wrong? User error
	return null; // so we cancel the function
	   }else{
	return allImages; // give back the images. Success!
        };// end all images check

	};// end function loadFiles
} // END OF SCRIPT

This Gist is part of MT4D coming soon on fabiantheblind.info