Initial Commit

Java/Processing/processing-3.3.6/modes/java/examples/Topics/GUI/Rollover/Rollover.pde

@@ -0,0 +1,82 @@
+/**
+ * Rollover. 
+ * 
+ * Roll over the colored squares in the center of the image
+ * to change the color of the outside rectangle. 
+ */
+ 
+ 
+int rectX, rectY;      // Position of square button
+int circleX, circleY;  // Position of circle button
+int rectSize = 90;     // Diameter of rect
+int circleSize = 93;   // Diameter of circle
+
+color rectColor;
+color circleColor;
+color baseColor;
+
+boolean rectOver = false;
+boolean circleOver = false;
+
+void setup() {
+  size(640, 360);
+  rectColor = color(0);
+  circleColor = color(255);
+  baseColor = color(102);
+  circleX = width/2+circleSize/2+10;
+  circleY = height/2;
+  rectX = width/2-rectSize-10;
+  rectY = height/2-rectSize/2;
+  ellipseMode(CENTER);
+}
+
+void draw() {
+  update(mouseX, mouseY);
+
+  noStroke();
+  if (rectOver) {
+    background(rectColor);
+  } else if (circleOver) {
+    background(circleColor);
+  } else {
+    background(baseColor);
+  }
+
+  stroke(255);
+  fill(rectColor);
+  rect(rectX, rectY, rectSize, rectSize);
+  stroke(0);
+  fill(circleColor);
+  ellipse(circleX, circleY, circleSize, circleSize);
+}
+
+void update(int x, int y) {
+  if( overCircle(circleX, circleY, circleSize) ) {
+    circleOver = true;
+    rectOver = false;
+  } else if ( overRect(rectX, rectY, rectSize, rectSize) ) {
+    rectOver = true;
+    circleOver = false;
+  } else {
+    circleOver = rectOver = false;
+  }
+}
+
+boolean overRect(int x, int y, int width, int height) {
+  if (mouseX >= x && mouseX <= x+width && 
+      mouseY >= y && mouseY <= y+height) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+boolean overCircle(int x, int y, int diameter) {
+  float disX = x - mouseX;
+  float disY = y - mouseY;
+  if(sqrt(sq(disX) + sq(disY)) < diameter/2 ) {
+    return true;
+  } else {
+    return false;
+  }
+}