Click on one of four images
Jaap MurreThe waitfor ... or ... construct allows two or more events to be specified, where the first one to occur is handled and the rest is ignored. So, if we click on b3, the script is no longer waiting for the other three blocks (images) to be clicked and moves past the final 'or' clause.
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var n,
size = 40,
b1 = main.addblock("left","top",size,size),
b2 = main.addblock("right","top",size,size),
b3 = main.addblock("left","bottom",size,size),
b4 = main.addblock("right","bottom",size,size);
b1.preload("color_cars1.png"); // preload each image in each block where it will be shown
b2.preload("color_cars2.png");
b3.preload("color_cars3.png");
b4.preload("color_cars4.png");
image.await("preloading_completed"); // Wait until all images are preloaded
// The waitfor ... or ... construct allows two or more events to be specified,
// where the first one to occur is handled and the rest is ignored. So, if we
// click on b3, the script is no longer waiting for clicks on the other blocks.
waitfor { // waitfor is not part of normal JavaScript so it (only) appears we have an error
b1.setimage("color_cars1.png");
b1.await('click');
n = 1;
} or {
b2.setimage("color_cars2.png");
b2.await('click');
n = 2;
} or {
b3.setimage("color_cars3.png");
b3.await('click');
n = 3;
} or {
b4.setimage("color_cars4.png");
b4.await('click');
n = 4;
}
text("You clicked on image " + n);
await(3000);
color_cars1.png
color_cars2.png
color_cars3.png
color_cars4.png