Image export, on_color_changed, rotation of column labels

[akaever]

I've encountered a couple of issues when working with the dev version:

1. When exporting png images (camera symbol), a zoom factor 3 is applied to the heatmap. For larger heatmaps, this results in pretty high memory consumption (up to 1.5 GB). Some input to adjust this factor would be quite useful (I currently use a simple prompt).

For Chrome and Show image, an iframe environment is needed:

function open_image(dataUrl){
      // put image data into iframe (otherwise issues with chrome)
      var iframe = "<iframe width='100%' height='100%' src='" + dataUrl + "'></iframe>";
      var x = window.open();
      x.document.open();
      x.document.write(iframe);
      x.document.close();
      // window.open(dataUrl, "_blank");
};

2. Looks like a couple of event handlers were dropped in the dev version. on_color_changed was quite useful for storing and restoring heatmap settings. I guess you dropped some of these handlers which were not used so frequently?

3. The partial rotation of column labels was removed (90/-90 instead of 45/-45). This feature was quite useful for reading the labels or long labels..

[skutac]

1. You are right that the export can get really huge in some cases. I will add an option to the InCHlib settigns where you can set the size (%) of the export.

Concerning the Show image options, I've found out that the used implementation is no longer supported by most of the browsers. I'll try to do something with it.

2. To be true, I think there never was an event on_color_change (at least it is not in the ver. 1.2.0). I renamed some of the events in the dev version, but also mapped the older ones to the new names, so, it should work both ways.

3. OK, I can add the option to the settings.

Thank you for the feedback.