c# - Resize the canvas after zooming -

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i'm performing zooming canvas using matrix. code below:

void zoom_mousewheel(object sender, mousewheeleventargs e) {         point p = e.mousedevice.getposition(clipborder);          matrix m = canvaspanel.rendertransform.value;         if (e.delta > 0)             m.scaleatprepend(1.1, 1.1, p.x, p.y);         else             m.scaleatprepend(1 / 1.1, 1 / 1.1, p.x, p.y);          canvaspanel.rendertransform = new matrixtransform(m);        // canvaspanel.rendertransformorigin = new point(0.5, 0.5); }

i want resize canvas when click button in main window. can 1 plz, me out.

regards,

viswa

private void btn_original_click(object sender, routedeventargs e)//---------------------------------------> event getting original size of canvas     {         matrix m = canvaspanel.rendertransform.value;         m.setidentity();                          canvaspanel.rendertransform = new matrixtransform(m);     }

this makes canvas set original size of , comes it's original position


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