com.github.strikerx3.jxinput.XInputButtonsDelta Maven / Gradle / Ivy
package com.github.strikerx3.jxinput;
import com.github.strikerx3.jxinput.enums.XInputButton;
/**
* Represents the delta (change) of the buttons between two successive polls.
*
* @author Ivan "StrikerX3" Oliveira
*/
public class XInputButtonsDelta {
private final XInputButtons lastButtons;
private final XInputButtons buttons;
protected XInputButtonsDelta(final XInputButtons lastButtons, final XInputButtons buttons) {
this.lastButtons = lastButtons;
this.buttons = buttons;
}
/**
* Returns true if the button was pressed (i.e. changed from released to pressed between two consecutive polls).
*
* @param button the button
* @return true if the button was pressed, false otherwise
*/
public boolean isPressed(final XInputButton button) {
return delta(lastButtons, buttons, button);
}
/**
* Returns true if the button was released (i.e. changed from pressed to released between two consecutive polls).
*
* @param button the button
* @return true if the button was released, false otherwise
*/
public boolean isReleased(final XInputButton button) {
return delta(buttons, lastButtons, button);
}
/**
* Determines if the state of a button was changed from one poll to the following poll.
*
* @param from the old state
* @param to the new state
* @param button the button
* @return true if there was a change, false otherwise
*/
private boolean delta(final XInputButtons from, final XInputButtons to, final XInputButton button) {
switch (button) {
case A:
return !from.a && to.a;
case B:
return !from.b && to.b;
case X:
return !from.x && to.x;
case Y:
return !from.y && to.y;
case BACK:
return !from.back && to.back;
case START:
return !from.start && to.start;
case LEFT_SHOULDER:
return !from.lShoulder && to.lShoulder;
case RIGHT_SHOULDER:
return !from.rShoulder && to.rShoulder;
case LEFT_THUMBSTICK:
return !from.lThumb && to.lThumb;
case RIGHT_THUMBSTICK:
return !from.rThumb && to.rThumb;
case DPAD_UP:
return !from.up && to.up;
case DPAD_DOWN:
return !from.down && to.down;
case DPAD_LEFT:
return !from.left && to.left;
case DPAD_RIGHT:
return !from.right && to.right;
case GUIDE_BUTTON:
return !from.guide && to.guide;
case UNKNOWN:
return !from.unknown && to.unknown;
}
return false;
}
}