Editing zoomFactor - FilterMeisterWiki

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= zoomFactor =

== Syntax ==
{{int zoomFactor}}

== Description ==
An integer between 1 and 16 to indicate the current zoom factor of the proxy preview window, or 0 if the proxy zoom factor has not yet been set. (In the current implementation, the zoomFactor variable is essentially the same as the built-in scaleFactor variable.)

== Example ==
<code>
%ffp

ctl(0): STATICTEXT, "Please right click on the preview to set a cross.", size=(100,20)

OnCtl(n): {

if (n == CTL_PREVIEW &amp;&amp; e == FME_RIGHTCLICKED_DOWN) {
    j0 = getPreviewCoordX() * zoomFactor;
    j1 = getPreviewCoordY() * zoomFactor;
    doAction(CA_PREVIEW );
  }
  return false;
}

ForEveryTile: {

int g, h, z, color;
  int PreviewX = j0/zoomFactor;
  int PreviewY = j1/zoomFactor;

// Calculate color of the cross
  color = ( src(PreviewX, PreviewY, 0) + src(PreviewX, PreviewY, 1) + src(PreviewX, PreviewY, 2) ) /3;
  if (color &gt; 128 &amp;&amp; color &lt; 196) color=0; 
  if (color &gt; 64 &amp;&amp; color &lt; 128) color=255;
  else color =255-color;

// Display Cross
  if (doingProxy){
    for (z=0; z &lt; Z; z++) {
      for (g=-7; g &lt; 8; g++)
        if (g &lt; -1 || g &gt; 1) pset(PreviewX + g, PreviewY, z, color);
      for (h=-7; h &lt; 8; h++)
        if (h &lt; -1 || h &gt; 1) pset(PreviewX, PreviewY + h, z, color );	
    }
  }

return true;
}
</code>

== See Also ==
((Constants)), ((scaleFactor)), ((setZoom))

Summary of change:
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