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Normal Topic Non resizable diagram alignment grid during zoom in/out ! (Read 1402 times)
Kannan Thirumal
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Non resizable diagram alignment grid during zoom in/out !
Jun 25th, 2019 at 5:22am
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Hi,

We show the diagram background alignment grid like this,

this.diagram.setShowGrid(true);

But when zoom in/out, the background grid size also gets changed. Is there any way to stop this?

Regards,
Kannan
  
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Lyubo
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Re: Non resizable diagram alignment grid during zoom in/out !
Reply #1 - Jun 25th, 2019 at 8:09am
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Hi,

The background grid measures distances in diagram units, that's why it scales, when the view is zoomed. To achieve something close to your requirement, you can adjust the gridSizeX and gridSizeY values in response to a zoom event:
Code (Javascript)
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diagram.setVirtualScroll(true); // required for better performance

var defaultGridSize = 4; // this is the default diagram gridSizeX/Y value, can set to other initial value.

diagram.addEventListener("zoomChanged", function (sender, args)
{
    var scale = diagram.getZoomFactor() / 100;
    diagram.setGridSizeX(defaultGridSize / scale);
    diagram.setGridSizeY(defaultGridSize / scale);
});


Alternatively, you can consider setting a background image, representing a static grid.

Regards,
Lyubo
  
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