it looks good, could you please post an example how to use it. we need to make it all DynImage -compatible if we're going to replace the old DynImage-loader with this one.
the old DynImage.getImage(src,w,h), DynImage.onLoaderStart(), DynImage.onLoading() and DynImage.onLoaderDone() must work but can make calls to the new imageloader-class' methods instead. and i believe some widgets must be updated (ie scrollbar and scrollpane) /martin > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] On Behalf Of > Michael Bürge > Sent: den 11 november 2001 23:14 > To: [EMAIL PROTECTED] > Subject: [Dynapi-Dev] image-loader > > > there was some discussion about writing a new imageloader. > i wrote one some time ago and this may be good moment to > bring it to the > public. > > the attached file provides the two classes ImageObj and > ImageSet plus the > standalone-object ImageLoader. > > > ImageObj: > basically this acts as a wrapper around the Image-Object. > the constructor accepts 3 arguments: > > var myImg = new ImageObj('path/img.gif',20,20); > > note that after this line, the image hasn't yet been loaded. there's a > load-method: > > myImg.load(new Function('alert("image loaded")')); > > the function (a string containig code will work too) passed as first > argument will be called when the image has been loaded. a > second function > can be passed which is called if the image fails to load. > > > ImageSet: > this is, the name says it, a set of images. > example: > > imgs = ImageSet(); > imgs.addImage('image1','path/img1.gif',10,10); > imgs.addImage('image2','path/img2.gif',10,10); > .. > .. > imgs.load('alert("all imgs loaded")') > > once the ImageSet is loaded, the images can be accessed using > getImage(name), a method that returns an ImageObj. > > img = imgs.getImage('image1'); > > this gives the advantage of having the possibility to manage images in > groups. > there's a lot more to mention. just a few things: > - a base-path can be specified for each ImageSet using > setImgPath(path) > - the load-method accepts a second argument. it should be a > function or a > string containing code which the is called whenever an image > of the set is > loaded. > > > ImageLoader: > the purpose of the ImageLoader is to load all ImageObjs and > ImageSets that > have been created before loadtime automagically. this is done > by adding a > loadfunction to the DynAPI delaying the call of DynAPI.onload (by > overwriting it). > it provides three hook: > ImageLoader.onloaderstart = function() { /* code here */ } > ImageLoader.onloaderprogress = function() { /* code here */ } > ImageLoader.onloaderdone = function() { /* code here */ } > its pretty easy to set up a nice progressbar with these. > > > that's not all that could be said. there are a few usefull > comment in the > code, so have a look at it. > i've been using this for some time now and it prooves pretty robust. > > comments? questions? > > -- > Michael Buerge > > > _______________________________________________ Dynapi-Dev mailing list [EMAIL PROTECTED] http://www.mail-archive.com/dynapi-dev@lists.sourceforge.net/
