Sprite::whenBackdropSwitches()
This method is called when the backdrop of the stage switches. The method will receive the name of the new backdrop as a paramter.
Examples
import org.openpatch.scratch.Sprite;
import org.openpatch.scratch.Stage;
public class SpriteWhenBackdropSwitches {
public SpriteWhenBackdropSwitches() {
Stage myStage = new Stage(600, 240);
myStage.addBackdrop("forest", "assets/background_forest.png");
myStage.addBackdrop("sea", "assets/background_sea.png");
myStage.addTimer("backdrop");
myStage.add(new CustomSprite());
while (myStage.getTimer().forMillis(3000)) {
if (myStage.getTimer("backdrop").intervalMillis(1000)) {
myStage.switchBackdrop("sea");
} else {
myStage.switchBackdrop("forest");
}
}
myStage.exit();
}
public static void main(String[] args) {
new SpriteWhenBackdropSwitches();
}
}
class CustomSprite extends Sprite {
public CustomSprite() {
this.addCostume("zeta", "assets/zeta_green_badge.png");
this.addCostume("gamma", "assets/gamma_purple_badge.png");
}
@Override
public void whenBackdropSwitches(String name) {
if (name.equals("forest")) {
this.switchCostume("zeta");
} else if (name.equals("sea")) {
this.switchCostume("gamma");
}
}
}
Syntax
Java
void whenBackdropSwitches(name)
Scratch
Parameters
Name | Data Type | Description |
---|---|---|
name | String | Name of the new backdrop. |
Return
void