Have object - want that user sees selection

[K.Daube]

Dear experts,

I'm down in the object store and have found a marker. I want that the user sees in the document, what I have found.

The problem is: how to come from an object to a TextSelection and TextLocation? All I have found goes the other way round.

currentMarker = GetFirstMarker (doc, "#calc"); // this does its job
doc.TextSelecton = currentMarker;              // no error, no effect 
doc.ScrollToText(...);                         // requires TextLocation

I have studied more than one diagram of the DOM but still don't see through the fog.

Klaus

[Klaus Göbel]

Hi Klaus,

that should work:

var tloc = currentMarker.TextLoc;
var tlocStart = new TextLoc(currentMarker.TextLoc.beg.obj,currentMarker.TextLoc.beg.offset);
tlocEnd.offset = tlocEnd.offset + 1; // if you want to select the marker
var tlocEnd = new TextLoc(currentMarker.TextLoc.end.obj,currentMarker.TextLoc.end.offset);      // beg and end  have the same value, but this is to show the complete way
var myTextRange = new TextRange (tlocStart, tlocEnd);   // define a TextRange
doc.TextSelection = myTextRange;  // if you want to select the marker
doc.ScrollToText(myTextRange);                         // requires a TextRange. NOT a location

In your code line 3 you have to use a TextRange.

This TextRange you get from your Marker's TextLoc (marker.TextLoc)

[K.Daube]

Thanks Klaus,

Not relevant: line 1 is dangling in the air - tloc not used any further.

More delicate: currentMarker.TextLoc.beg.obj creates "undefined is not an object".

but currentMarker.beg.obj creates the same error, as I tried in the following code to have more steps to walk through:

function DisplayMarker (oDoc, currentMarker) {
  var tloc = currentMarker.TextLoc;  
  // beg and end  have the same value, but this is to show the complete way 
  var begObj    = currentMarker.TextLoc.beg.obj;
  var begOffset = currentMarker.TextLoc.beg.offset;
  var tlocStart = new TextLoc(begObj, begOffset);  
  var tlocEnd =   new TextLoc(currentMarker.TextLoc.end.obj, currentMarker.TextLoc.end.offset);   
  tlocEnd.offset = tlocEnd.offset + 1;            // if you want to select the marker  
    
  var myTextRange = new TextRange (tlocStart, tlocEnd);   // define a TextRange  
  oDoc.TextSelection = myTextRange;               // if you want to select the marker  
  oDoc.ScrollToText(myTextRange);                 // requires a TextRange. NOT a location  
 }

Still confused, but on a higher level ...

Klaus

[Klaus Göbel · Accepted solution]

Hi Klaus,

I have to say sorry. I was lacking in concentration.

Here the right solution. (I hope, this time with better concentration)

This is the way:

you get the textlocation.

you create a textrange.

you select the text.

var tloc1 = currentMarker.TextLoc;
var tloc2 = currentMarker.TextLoc;
tloc2.offset = tloc2.offset+1;
var myTextRange  = new TextRange(tloc1,tloc2);
doc.TextSelection = myTextRange ;
doc.ScrollToText (myTextRange );

[K.Daube]

Yes, Klaus, your concentration was excellent!

function DisplayMarker (oDoc, currentMarker) {
  var tloc1 = currentMarker.TextLoc;  
  var tloc2 = currentMarker.TextLoc;  
  tloc2.offset = tloc2.offset+1;                 // offset2 = offset1 is given by TextLoc 
  var myTextRange  = new TextRange(tloc1,tloc2); // define a TextRange    
  oDoc.TextSelection = myTextRange;              // if you want to select the marker  
  oDoc.ScrollToText(myTextRange);                // requires a TextRange. NOT a location  
 }

The marker becomes selected in line 7, before the function is left: