private void setupCanvas() {
mousePanMediator.setBatchDraw(true);
mousePanMediator.setTransformMediator(new BoundaryTransformMediator());
gridPanel.getViewport().getMediators().push(mousePanMediator);
final Transform transform = new Transform().scale(VP_SCALE);
gridPanel.getViewport().setTransform(transform);
gridPanel.add(gridLayer);
}
@Override
public void setZoom(final int zoom) {
final Transform transform = new Transform();
final double tx = gridPanel.getViewport().getTransform().getTranslateX();
final double ty = gridPanel.getViewport().getTransform().getTranslateY();
transform.translate(tx, ty);
transform.scale(((double) zoom / 100.0));
gridPanel.getViewport().setTransform(transform);
gridPanel.getViewport().batch();
}
@Override
public void onResize() {
gridPanel.onResize();
}
@Override
public HandlerRegistration addKeyDownHandler(final KeyDownHandler handler) {
return gridPanel.addDomHandler(handler, KeyDownEvent.getType());
}