Programming Resources
For Fun and Learning
Charles Cusack
Computer Science
Hope College
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Alice

SimpleListDemo


Description

Run it
Download jar file (Right click)

ListButton.java
ListView.java
MyList.java
SimpleListDemo.java

ListView.java

import aLibrary.*;
import java.awt.*;

public class ListView extends AView {
    private MyList dispList;
//------------------------------------------------------------------------------
    public ListView(MyList l) {
        super(25,25,800,100);
        dispList = l;
        int j=dispList.index();
        drawPointer(70*j+5,20);
        dispList.start();
        for(int i=0; i<dispList.count(); i++) {
                drawArrow(70*i,13,30);
                drawItem(70*i+30,0,40,25,dispList.item());
                dispList.forth();
        }
        dispList.start();
        for(int i=0;i<j;i++)
            dispList.forth();
    }
//------------------------------------------------------------------------------
    private void drawArrow(int x,int y,int l) {
        ALine arrowB, arrowH1, arrowH2;
        arrowB = new ALine(x,y,x+l,y);
        arrowH1 = new ALine(x+l,y,x+l-6,y-4);
        arrowH2 = new ALine(x+l,y,x+l-6,y+4);
        arrowB.place(this);
        arrowH1.place(this);
        arrowH2.place(this);
    }
//------------------------------------------------------------------------------
    private void drawItem(int x,int y,int w,int h,Object A) {
        ARectangle outerRect, innerRect;
        innerRect = new ARectangle(x,y,w,h);
        innerRect.setColor(Color.lightGray);
        innerRect.setToFill();
        outerRect = new ARectangle(x,y,w,h);
        innerRect.place(this);
        outerRect.place(this);

        ALabel blah=new ALabel(x+2,y+2,w,h);
        if(A instanceof String) {
            blah.setText((String) A);
        }
        else {
           blah.setText("Not a String");
        }
        blah.place(this);
    }
//------------------------------------------------------------------------------
    private void drawPointer(int x,int y) {
        AOval theBaseO, theBaseI;
        ALine arrowB1, arrowB2, arrowH1, arrowH2;
        ALabel theLabel;

        arrowH1 = new ALine(x+12,y,x+5,y+10);
        arrowH2 = new ALine(x+12,y,x+19,y+10);
        arrowB1 = new ALine(x+9,y+5,x+9,y+30);
        arrowB2 = new ALine(x+15,y+5,x+15,y+30);
        theBaseO = new AOval(x,y+25,24,24);
        theBaseI = new AOval(x,y+25,24,24);
        theBaseI.setColor(Color.yellow);
        theBaseI.setToFill();
        theLabel = new ALabel(x+5,y+29,15,15);
        theLabel.setFontSize(12);
        theLabel.setText("" + dispList.index());

        arrowH1.place(this);
        arrowH2.place(this);
        arrowB1.place(this);
        arrowB2.place(this);
        theBaseI.place(this);
        theBaseO.place(this);
        theLabel.place(this);
    }
}