/**
* Scales the view about the center of the canvas.
*
* @param scale the amount to scale
*/
private void scaleViewAboutPoint(double scale) {
Rectangle canvasBounds = graph.getCanvas().getBounds();
graph
.getCanvas()
.getCamera()
.scaleViewAboutPoint(scale, canvasBounds.getCenterX(), canvasBounds.getCenterY());
}
/**
* Controls which direction to pan the canvas.
*
* @param dir integer representing the direction to pan
*/
private void pan(int dir) {
int amount = 15;
if (dir == LEFT) {
graph.getCanvas().getCamera().translateView(-amount, 0);
} else if (dir == RIGHT) {
graph.getCanvas().getCamera().translateView(amount, 0);
} else if (dir == UP) {
graph.getCanvas().getCamera().translateView(0, -amount);
} else if (dir == DOWN) {
graph.getCanvas().getCamera().translateView(0, amount);
}
}