Grip / isHovering()

• Example
• CircleCrip

import compose.grips.*;  

GripDispatcher dispatch;  
CircleGrip myGrip;  

void setup() {  
  dispatch = new GripDispatcher(this);  
  myGrip = new CircleGrip(50, 50, 40);  
}  

void draw() {  
  dispatch.update(); // Checks for hover  
  dispatch.draw(); // Calls all the draw methods  
}  

class CircleGrip extends Grip {  

  float x, y, diameter;  

  CircleGrip(float x, float y, float diameter) {  
    this.x = x;  
    this.y = y;  
    this.diameter = diameter;  
  }  

  boolean isHovering() {  
    return dist(mouseX, mouseY, x, y) < diameter/2;  
  }  

  void draw() {  
    if (this.isHovering()) {  
      fill(255, 255, 0);  
    } else {  
      fill(255);  
    }  
    ellipse(x, y, diameter, diameter);  
  }  

} 

Description

Called by GripDispatcher to qualify this Grip for “hover” status. Implement this method with logic that determines whether or not the mouse is contained by this Grip’s geometry.

By default, this method always returns false, so GripDispatcher won’t ever know if your mouse is on top of the Grip. Until you implement this method GripDispatcher cannot broadcast events to your Grip.

Multiple Grip objects may return true for this method in a given update cycle, but only one will be selected as the hover, whichever is closest to the front of the screen.

Syntax

class FancyGrip extends Grip { 
   boolean isHovering() {
      return true or false
   }
}

Parameters

None

Returns

True if the mouse is contained by this Grip's geometry.

Usage

Web & Applications

Related

• isTheHover()
• GripDispatcher :: getHoverGrip()

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