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Andy79  
#1 Posted : Sunday, October 7, 2012 8:05:27 PM(UTC)
Andy79

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Hi guys,

What is the correct way to remove all vObjects (except the first vObject) from a specific layer
on a CanvasViewer using javascript?

I'm finding that every second object I try to remove is null for some reason...

Code:


// This function removes all vObjects starting from index 1 from the 3rd layer of the CanvasViewer

function RemoveAll() {
 var canvasViewer = $find("<%= photoLabel.CanvasViewer.ClientID %>");
 var cv = canvasViewer.get_canvas();
 var layers = canvasViewer.get_canvas().get_layers();
 var voc = layers.get_item(2).get_vObjects();

 for (var i = 1; i <= voc.get_count(); i++) { 
     voc.removeAt(i);
}



In one example, I have 7 objects on the 3rd layer. I want to remove all vObjects except the first one (index 0).
In this example there will be 6 vObjects I need to remove.

When I run the code above only every second vObject is removed for some reason.

I tried to debug the issue by putting an alert before the for-loop:

Code:

alert(voc.get_count()); // this displays 7 in my example


I also put an alert before voc.removeAt(i)...

Code:

alert(voc.get_item(i).get_index());


...I find that only 3 objects exist, the other 3 are always null.

Any idea what might be causing this, or if there is a better way to achieve the above requirement?

Thanks!
Andrew
p.shirykalova  
#2 Posted : Tuesday, October 9, 2012 1:44:03 AM(UTC)
p.shirykalova

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Hi Andrew!

Sorry for my late reply.
I discussed your issue with our developers. They provided me with the code example which might be helpful:
Code:
$(".psdEditor button.delete").live('click', function () {
   if (!confirm(self._confirmDeleteText)) return false;
   var vObjects = ($(this).closest('#imageInputList').size() > 0 ? self.getCurrentLayerImage() : self.getCurrentLayerText()).get_vObjects();
   var id = $(this).closest('li').attr('id');
   for (var k = 0; k < vObjects.get_count(); k++) {
    var item = vObjects.get_item(k);
    if (item.get_uniqueId() == id) {
     vObjects.removeAt(vObjects.indexOf(item));
     break;
    };
   }
   self._canvas.set_currentVObjectIndex(-1);
   self._canvas.redraw();
   self._onZoneChange();
   $('.psdEditor').trigger('userImageChanged', []);
   return false;
  });

They say the attention should be paid on this line:
Code:
vObjects.removeAt(vObjects.indexOf(item));

This is the correct way to delete vObjects.
Best regards,
Pauline Shirykalova
Aurigma Technical Support
Andy79  
#3 Posted : Tuesday, October 9, 2012 3:42:50 PM(UTC)
Andy79

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Thanks Pauline,

The code provided is not what I require.
Please ask your developers to provide an example of removing vObjects from a specific CanvasViewer layer.

I am using the .removeAt method already and notice that not all vObjects are being removed. I would like your developers to clarify whether my implementation is incorrect or whether this is a bug with the CanvasViewer.

Thanks,
Andrew
p.shirykalova  
#4 Posted : Thursday, October 11, 2012 1:13:07 AM(UTC)
p.shirykalova

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Hi Andy,

You don't consider the fact that the index of the objects standing after the one you delete is decreased by 1. Please try the following code:
Code:
function RemoveAll() {
 var canvasViewer = $find("<%= photoLabel.CanvasViewer.ClientID %>");
 var cv = canvasViewer.get_canvas();
 var layers = canvasViewer.get_canvas().get_layers();
 var voc = layers.get_item(2).get_vObjects();
 
 while(voc.get_count() > 1)
{
    voc.removeAt(voc.get_count() - 1);
}

cv.set_currentVObjectIndex(-1);
cv.redraw();
}

Best regards,
Pauline Shirykalova
Aurigma Technical Support
thanks 1 user thanked p.shirykalova for this useful post.
Andy79 on 10/15/2012(UTC)
Andy79  
#5 Posted : Monday, October 15, 2012 6:08:44 PM(UTC)
Andy79

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Thanks very much. The code worked perfectly.
thanks 1 user thanked Andy79 for this useful post.
p.shirykalova on 10/15/2012(UTC)
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