snapToGrid problem

[navrkal.pavel]

Hi,
I'm using smartgwt 3.1p_2013-06-19 in Firefox 21.

I have parent Canvas with setSnapHGap(150) and setSnapVGap(150) as a grid for snap Canvas with setSnapToGrid(true).

When I try drag&drop the snap canvas over the parent, just a small movement (1-2 px) to jump to the next field bottom or right. But if I want to jump next field left or top, I need long mouse move.

This behavior is very uncomfortable.

Can I tune some parameters to improve this behavior?

Here is full code exapmle:

import com.google.gwt.core.client.EntryPoint;
import com.smartgwt.client.types.DragAppearance;
import com.smartgwt.client.widgets.Canvas;


public class SnapTest implements EntryPoint {

	private int width = 150;
	private int height = 150;
	private Canvas parent;
	private Canvas snap;

	public void onModuleLoad() {
		parent = new Canvas();
		parent.setWidth100();
		parent.setHeight100();
		parent.setSnapHGap(width);
		parent.setSnapVGap(height);
		parent.draw();

		drawGrid();

		snap = new Canvas();
		snap.setCanDragReposition(true);
		snap.setDragAppearance(DragAppearance.TARGET);
		snap.setBackgroundColor("red");
		snap.setSnapToGrid(true);
		snap.setWidth(width);
		snap.setHeight(height);
		snap.setParentElement(parent);
		snap.moveTo(width, height);
	}


	private void drawGrid() {
		Canvas cnv;
		for (int curHeight = 0;(curHeight + height) < parent.getHeight(); curHeight += height) {
			for (int curWidth = 0;(curWidth + width) < parent.getWidth(); curWidth += width) {
				cnv = getCanvas();
				cnv.moveTo(curWidth, curHeight);
			}
		}
	}


	private Canvas getCanvas() {
		Canvas cnv = new Canvas();
		cnv.setWidth(width);
		cnv.setHeight(height);
		cnv.setParentElement(parent);
		cnv.setBorder("1px solid blue");

		return cnv;
	}
}