public void handleMessage(String event, JSONObject message) {
try {
if (MESSAGE_ZOOM_RECT.equals(event)) {
float x = (float) message.getDouble("x");
float y = (float) message.getDouble("y");
final RectF zoomRect =
new RectF(x, y, x + (float) message.getDouble("w"), y + (float) message.getDouble("h"));
mTarget.post(
new Runnable() {
public void run() {
animatedZoomTo(zoomRect);
}
});
} else if (MESSAGE_ZOOM_PAGE.equals(event)) {
ImmutableViewportMetrics metrics = getMetrics();
RectF cssPageRect = metrics.getCssPageRect();
RectF viewableRect = metrics.getCssViewport();
float y = viewableRect.top;
// attempt to keep zoom keep focused on the center of the viewport
float newHeight = viewableRect.height() * cssPageRect.width() / viewableRect.width();
float dh = viewableRect.height() - newHeight; // increase in the height
final RectF r = new RectF(0.0f, y + dh / 2, cssPageRect.width(), y + dh / 2 + newHeight);
mTarget.post(
new Runnable() {
public void run() {
animatedZoomTo(r);
}
});
}
} catch (Exception e) {
Log.e(LOGTAG, "Exception handling message \"" + event + "\":", e);
}
}
