CODEWITHSUNDEEP
javascriptjqueryinfovis
Jhilom
Jhilom

Reputation: 1028

Alternative Zoom option on JIT Graph

I am using Java Infovis Toolkit. And I want any button option for zooming rather than Mouse wheel. Can Anyone help me with how can I apply two buttons for Zoom in and Zoom out rather than mouse wheel.

Upvotes: 0

Views: 1090

Answers (1)

Pratik Patel
Pratik Patel

Reputation: 1345

If you have two buttons, for zooming in/out then you can use following handler functions with them.

handler: function(btn){
                        //zoom in
                        var val = fd.controller.Navigation.zooming/1000; 
                        var ans = 1 + (10 * val);
                        fd.canvas.scale(ans, ans);
         }

For zoom out,

handler: function(btn){
                        //zoom out
                        var val = fd.controller.Navigation.zooming/1000;  
                        var ans = 1 - (10 * val);
                        fd.canvas.scale(ans, ans);
         }

Here fd is the instance of ForceDirected visualization, you can replace that by an instance of your visualization.

Upvotes: 2

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