source: winedb/src/gamegui/ScrollBar.java

package gamegui;

import java.awt.*;
import java.awt.event.*;

public class ScrollBar extends Member {
        int size;
        int position;
        int scrollSpeed;
        boolean horizontal;

        public ScrollBar(String newName, int newX, int newY, int newWidth, int newHeight, int scrollSpeed, boolean horizontal) {
                super(newName, newX, newY, newWidth, newHeight);

                size = 0;
                position = 0;
                this.scrollSpeed = scrollSpeed;
                this.horizontal = horizontal;
        }

        public void clear() {
                size = 0;
                position = 0;
        }

        public boolean handleEvent(MouseEvent e) {
                int x = e.getX(), y = e.getY();

                if(horizontal) {
                        if(getY() <= y && y <= getY()+getHeight()) {
                                if(getX() <= x && x <= getX()+getHeight()) {
                                        setPosition(position-scrollSpeed);
                                        return true;
                                }else if(getX()+getWidth()-getHeight() <= x && x <= getX()+getWidth()) {
                                        setPosition(position+scrollSpeed);
                                        return true;
                                }
                        }
                        return false;
                }else {
                        if(getX() <= x && x <= getX()+getWidth()) {
                                if(getY() <= y && y <= getY()+getWidth()) {
                                        setPosition(position-scrollSpeed);
                                        return true;
                                }else if(getY()+getHeight()-getWidth() <= y && y <= getY()+getHeight()) {
                                        setPosition(position+scrollSpeed);
                                        return true;
                                }
                        }
                        return false;
                }
        }

        public void draw(Graphics g) {
                g.setColor(Color.black);
                g.fillRect(getX(), getY(), getWidth(), getHeight());

                g.setColor(Color.red);
                g.drawRect(getX(), getY(), getWidth(), getHeight());

                if(horizontal) {
                        g.drawLine(getX()+getHeight(), getY(), getX()+getHeight(), getY()+getHeight());
                        g.drawLine(getX()+getWidth()-getHeight(), getY(), getX()+getWidth()-getHeight(), getY()+getHeight());

                        g.drawLine(getX()+getHeight()+position, getY(), getX()+getHeight()+position, getY()+getHeight());
                        g.drawLine(getX()+getHeight()+position+size, getY(), getX()+getHeight()+position+size, getY()+getHeight());

                        g.drawLine(getX()+getHeight()*17/20, getY()+getHeight()*3/20, getX()+getHeight()*17/20, getY()+getHeight()*17/20);
                        g.drawLine(getX()+getHeight()*17/20, getY()+getHeight()*17/20, getX()+getHeight()*3/20, getY()+getHeight()/2);
                        g.drawLine(getX()+getHeight()*3/20, getY()+getHeight()/2, getX()+getHeight()*17/20, getY()+getHeight()*3/20);

                        g.drawLine(getX()+getWidth()-getHeight()*17/20, getY()+getHeight()*3/20, getX()+getWidth()-getHeight()*17/20, getY()+getHeight()*17/20);
                        g.drawLine(getX()+getWidth()-getHeight()*17/20, getY()+getHeight()*17/20, getX()+getWidth()-getHeight()*3/20, getY()+getHeight()/2);
                        g.drawLine(getX()+getWidth()-getHeight()*3/20, getY()+getHeight()/2, getX()+getWidth()-getHeight()*17/20, getY()+getHeight()*3/20);
                }else {
                        g.drawLine(getX(), getY()+getWidth(), getX()+getWidth(), getY()+getWidth());
                        g.drawLine(getX(), getY()+getHeight()-getWidth(), getX()+getWidth(), getY()+getHeight()-getWidth());

                        g.drawLine(getX(), getY()+getWidth()+position, getX()+getWidth(), getY()+getWidth()+position);
                        g.drawLine(getX(), getY()+getWidth()+position+size, getX()+getWidth(), getY()+getWidth()+position+size);

                        g.drawLine(getX()+getWidth()*3/20, getY()+getWidth()*17/20, getX()+getWidth()*17/20, getY()+getWidth()*17/20);
                        g.drawLine(getX()+getWidth()*17/20, getY()+getWidth()*17/20, getX()+getWidth()/2, getY()+getWidth()*3/20);
                        g.drawLine(getX()+getWidth()/2, getY()+getWidth()*3/20, getX()+getWidth()*3/20, getY()+getWidth()*17/20);

                        g.drawLine(getX()+getWidth()*3/20, getY()+getHeight()-getWidth()*17/20, getX()+getWidth()*17/20, getY()+getHeight()-getWidth()*17/20);
                        g.drawLine(getX()+getWidth()*17/20, getY()+getHeight()-getWidth()*17/20, getX()+getWidth()/2, getY()+getHeight()-getWidth()*3/20);
                        g.drawLine(getX()+getWidth()/2, getY()+getHeight()-getWidth()*3/20, getX()+getWidth()*3/20, getY()+getHeight()-getWidth()*17/20);
                }
        }

        public int getPosition() {
                return position;
        }

        public int getSize() {
                return size;
        }

        public int getMaxSize() {
                if(horizontal)
                        return getWidth()-2*getHeight();
                else
                        return getHeight()-2*getWidth();
        }

        public void setPosition(int position) {
                if(position > getMaxSize()-size)
                        this.position = getMaxSize()-size;
                else if(position < 0)
                        this.position = 0;
                else
                        this.position = position;
        }

        public void setSize(int size) {
                this.size = size;
        }
}