Hi, I am trying to do some drag and drop with graphics. I have several rectangles that I want people to be able to click on, and drag over to a grid. If the cursor is in the grid, then I want a copy of the graphic to "snap" to one of the grid squares. If it is in the menu section, I don't want it to do anything. I've kind of gotten it to drag, but it is very slow, and lands about half an inch to the left of the original image. I'm pretty new to Java, especially graphics, so any help is greatly appreciated. Below you will find the code.
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
public class DragAndDrop extends JFrame
{
WATCanvas canvas;
public DragAndDrop()
{
super();
Container container = getContentPane();
setBackground(Color.WHITE);
canvas = new WATCanvas(800,600,45,40);
container.add(canvas);
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(1, 2));
container.add(panel, BorderLayout.SOUTH);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setSize(1200,1000);
setVisible(true);
}
class WATCanvas extends JPanel
{
Cursor curSP, curCSF, curCDF, curUB, curPP, curMod, curKD, cur;
int buttonLeftBorder = 900;
int buttonTopBorder = 20;
double spX=buttonLeftBorder, spY=buttonTopBorder+10, spW=20, spH=20;//singlePallet coordinates
double csFX=buttonLeftBorder, csFY=buttonTopBorder+90, csFW=80, csFH=40;//caseFlow coordinates
double cdFX=buttonLeftBorder, cdFY=buttonTopBorder+150, cdFW=40, cdFH=40;//caddyFlow coordinates
double ubX=buttonLeftBorder, ubY=buttonTopBorder+210, ubW=80, ubH=20;//unloadBulk coordinates
double ppX=buttonLeftBorder, ppY=buttonTopBorder+250, ppW=80, ppH=20;//prePick coordinates
double modX=buttonLeftBorder, modY=buttonTopBorder+290, modW=40, modH=40;//module coordinates
double kdX=buttonLeftBorder, kdY=buttonTopBorder+350, kdW=20, kdH=20;//kd coordinates
int x1, y1, x2, y2;
int width, height, rows, cols;
Rectangle2D singlePallet;
Rectangle2D caseFlow;
Rectangle2D caddyFlow;
Rectangle2D unloadBulk;
Rectangle2D prePick;
Rectangle2D module;
Rectangle2D kd;
Rectangle2D selectedShape;
Rectangle2D boundingRec;
public WATCanvas(int w, int h, int r, int c)
{
setBackground(Color.white);
setSize(width = w, height = h);
rows = r;
cols = c;
addMouseListener(new MyMouseListener());
addMouseMotionListener(new MyMouseMotionListener());
setTitle("Warehouse Allocation Model");
}
public void paint(Graphics g)
{
Font insideDrawing = new Font("TimesRoman",Font.PLAIN, 9);
Font boldDescription = new Font("TimesRoman", Font.BOLD, 10);
Graphics2D g2 = (Graphics2D) g;
//single pallet location
singlePallet = new Rectangle2D.Double(spX,spY,spW,spW);
g2.draw(singlePallet);
g2.setFont(insideDrawing);
g2.drawString("xxx", buttonLeftBorder+05, buttonTopBorder+15);
g2.setFont(boldDescription);
g2.drawString("Single Pallet Lane", buttonLeftBorder+25, buttonTopBorder+20);
//Multiple Pallets
g2.setFont(insideDrawing);
g2.drawString("xxx",buttonLeftBorder+05,buttonTopBorder+55);
g2.drawRect(buttonLeftBorder, buttonTopBorder+50, 20, 20);
g2.drawRect(buttonLeftBorder+20, buttonTopBorder+50, 20, 20);
g2.drawRect(buttonLeftBorder+40, buttonTopBorder+50, 20, 20);
g2.drawRect(buttonLeftBorder+60, buttonTopBorder+50, 20, 20);
g2.setFont(boldDescription);
g2.drawString("Flow Lane (4-deep example)", buttonLeftBorder+85, buttonTopBorder+60);
//Case Flow
caseFlow = new Rectangle2D.Double(csFX,csFY,csFW,csFH);
g2.setFont(insideDrawing);
g2.drawString("Case Flow", buttonLeftBorder+20, buttonTopBorder+115);
g2.draw(caseFlow);
g2.setFont(boldDescription);
g2.drawString("Standard Case Flow Rack", buttonLeftBorder+85, buttonTopBorder+115);
//Caddy Flow
caddyFlow = new Rectangle2D.Double(cdFX,cdFY,cdFW,cdFH);
g2.setFont(insideDrawing);
g2.drawString("Caddy",buttonLeftBorder+10, buttonTopBorder+170);
g2.drawString("Flow",buttonLeftBorder+12,buttonTopBorder+180);
g2.draw(caddyFlow);
g2.setFont(boldDescription);
g2.drawString("Standard Caddy Flow Rack", buttonLeftBorder+45, buttonTopBorder+175);
//Unload Bulk Door
unloadBulk = new Rectangle2D.Double(ubX,ubY,ubW,ubH);
g2.setFont(insideDrawing);
g2.setColor(Color.BLACK);
g2.fill(unloadBulk);
g2.setColor(Color.WHITE);
g2.drawString("Unload/Bulk Door", buttonLeftBorder+3, buttonTopBorder+223);
g2.setColor(Color.BLACK);
g2.setFont(boldDescription);
g2.drawString("Unload/Bulk Door", buttonLeftBorder+85, buttonTopBorder+223);
//Pre-Pick Trad
prePick = new Rectangle2D.Double(ppX,ppY,ppW,ppH);
g2.setFont(insideDrawing);
g2.fill(prePick);
g2.setColor(Color.WHITE);
g2.drawString("PP/Trad",buttonLeftBorder+20, buttonTopBorder+263);
g2.setFont(boldDescription);
g2.setColor(Color.BLACK);
g2.drawString("Pre-Pick Module", buttonLeftBorder+85, buttonTopBorder+263);
//Module with spotted pattern
module = new Rectangle2D.Double(modX,modY,modW,modH);
g2.setFont(insideDrawing);
BufferedImage bi = new BufferedImage(5,5,BufferedImage.TYPE_INT_RGB);
Graphics2D big = bi.createGraphics();
big.setColor(Color.WHITE);
big.fillRect(0, 0, 5, 5);
big.setColor(Color.LIGHT_GRAY);
big.fillOval(2, 2, 2, 2);
TexturePaint tp = new TexturePaint(bi, new Rectangle(5,5));
g2.setPaint(tp);
g2.fill(module);
g2.setFont(boldDescription);
g2.setColor(Color.BLACK);
g2.drawString("Module", buttonLeftBorder+04, buttonTopBorder+310);
g2.draw(module);
g2.setFont(boldDescription);
g2.drawString("Standard Caddy Flow Rack", buttonLeftBorder+45, buttonTopBorder+310);
//KD with spotted pattern
kd = new Rectangle2D.Double(kdX,kdY,kdW,kdH);
BufferedImage bi2 = new BufferedImage(5,5,BufferedImage.TYPE_INT_RGB);
Graphics2D big2 = bi2.createGraphics();
big2.setColor(Color.DARK_GRAY);
big2.fillRect(0, 0, 5, 5);
big2.setColor(Color.BLACK);
big2.fillOval(2, 2, 2, 2);
TexturePaint tp2 = new TexturePaint(bi2, new Rectangle(5,5));
g2.setPaint(tp2);
g2.fill(kd);
g2.setFont(boldDescription);
g2.setColor(Color.BLACK);
g2.drawString("KD", buttonLeftBorder+4, buttonTopBorder+365);
g2.draw(kd);
g.setFont(boldDescription);
g.drawString("KD Stands", buttonLeftBorder+25, buttonTopBorder+365);
width = 900;
height = 800;
int start = 25;
int rowHt = 20;
for(int j=0;j<=rows;++j)
g.drawLine(start, start + j*rowHt, height+start,start + j*rowHt);
int rowWid = 20;
for(int k=0;k<=cols;++k)
g.drawLine(start+k*rowWid, start, start + k*rowWid, width+start);
if (cur != null)
setCursor(cur);
}
class MyMouseListener extends MouseAdapter
{
public void mousePressed(MouseEvent e)
{
if (singlePallet.contains(e.getX(), e.getY()))
{
selectedShape = singlePallet;
if (boundingRec != null)
boundingRec = singlePallet.getBounds2D();
}
else if (caseFlow.contains(e.getX(), e.getY()))
{
selectedShape = caseFlow;
if (boundingRec != null)
boundingRec = caseFlow.getBounds2D();
}
else if (caddyFlow.contains(e.getX(), e.getY()))
{
selectedShape = caddyFlow;
if (boundingRec != null)
boundingRec = caddyFlow.getBounds2D();
}
else if (unloadBulk.contains(e.getX(), e.getY()))
{
selectedShape = unloadBulk;
if (boundingRec != null)
boundingRec = unloadBulk.getBounds2D();
}
else if (prePick.contains(e.getX(), e.getY()))
{
selectedShape = prePick;
if (boundingRec != null)
boundingRec = prePick.getBounds2D();
}
else if (module.contains(e.getX(), e.getY()))
{
selectedShape = module;
if (boundingRec != null)
boundingRec = module.getBounds2D();
}
else if (kd.contains(e.getX(), e.getY()))
{
selectedShape = kd;
if (boundingRec != null)
boundingRec = kd.getBounds2D();
}
else
{
boundingRec = null;
}
canvas.repaint();
x1 = e.getX();
y1 = e.getY();
}
public void mouseReleased(MouseEvent e)
{
if (singlePallet.contains(e.getX(), e.getY()))
{
boundingRec = singlePallet.getBounds2D();
selectedShape = singlePallet;
}
else if (caseFlow.contains(e.getX(), e.getY()))
{
boundingRec = caseFlow.getBounds2D();
selectedShape = caseFlow;
}
else if (caddyFlow.contains(e.getX(), e.getY()))
{
boundingRec = caddyFlow.getBounds2D();
selectedShape = caddyFlow;
}
else if (unloadBulk.contains(e.getX(), e.getY()))
{
boundingRec = unloadBulk.getBounds2D();
selectedShape = unloadBulk;
}
else if (prePick.contains(e.getX(), e.getY()))
{
boundingRec = prePick.getBounds2D();
selectedShape = prePick;
}
else if (module.contains(e.getX(), e.getY()))
{
boundingRec = module.getBounds2D();
selectedShape = module;
}
else if (kd.contains(e.getX(), e.getY()))
{
boundingRec = kd.getBounds2D();
selectedShape = kd;
}
//canvas.repaint();
}
public void mouseClicked(MouseEvent e)
{
if (singlePallet.contains(e.getX(), e.getY()))
{
selectedShape = singlePallet;
boundingRec = singlePallet.getBounds2D();
}
else if (caseFlow.contains(e.getX(), e.getY()))
{
selectedShape = caseFlow;
boundingRec = caseFlow.getBounds2D();
}
else if (caddyFlow.contains(e.getX(), e.getY()))
{
selectedShape = caddyFlow;
boundingRec = caddyFlow.getBounds2D();
}
else if (unloadBulk.contains(e.getX(), e.getY()))
{
selectedShape = unloadBulk;
boundingRec = unloadBulk.getBounds2D();
}
else if (prePick.contains(e.getX(), e.getY()))
{
selectedShape = prePick;
boundingRec = prePick.getBounds2D();
}
else if (module.contains(e.getX(), e.getY()))
{
selectedShape = module;
boundingRec = module.getBounds2D();
}
else if (kd.contains(e.getX(), e.getY()))
{
selectedShape = kd;
boundingRec = kd.getBounds2D();
}
else
{
if (boundingRec != null)
boundingRec = null;
}
canvas.repaint();
}
}
class MyMouseMotionListener extends MouseMotionAdapter
{
public void mouseDragged(MouseEvent e) {
if (singlePallet.contains(e.getX(), e.getY()))
{
boundingRec = null;
selectedShape = singlePallet;
x2 = e.getX();
y2 = e.getY();
spX = spX + x2 - x1;
spY = spY + y2 - y1;
x1 = x2;
y1 = y2;
}
else if (caseFlow.contains(e.getX(), e.getY()))
{
boundingRec = null;
selectedShape = caseFlow;
x2 = e.getX();
y2 = e.getY();
csFX = csFX + x2 - x1;
csFY = csFY + y2 - y1;
x1 = x2;
y1 = y2;
}
else if (caddyFlow.contains(e.getX(), e.getY()))
{
boundingRec = null;
selectedShape = caseFlow;
x2 = e.getX();
y2 = e.getY();
cdFX = cdFX + x2 - x1;
cdFY = cdFY + y2 - y1;
x1 = x2;
y1 = y2;
}
else if (unloadBulk.contains(e.getX(), e.getY()))
{
boundingRec = null;
selectedShape = caseFlow;
x2 = e.getX();
y2 = e.getY();
ubX = ubX + x2 - x1;
ubY = ubY + y2 - y1;
x1 = x2;
y1 = y2;
}
else if (prePick.contains(e.getX(), e.getY()))
{
boundingRec = null;
selectedShape = caseFlow;
x2 = e.getX();
y2 = e.getY();
ppX = ppX + x2 - x1;
ppY = ppY + y2 - y1;
x1 = x2;
y1 = y2;
}
else if (module.contains(e.getX(), e.getY()))
{
boundingRec = null;
selectedShape = caseFlow;
x2 = e.getX();
y2 = e.getY();
modX = modX + x2 - x1;
modY = modY + y2 - y1;
x1 = x2;
y1 = y2;
}
else if (kd.contains(e.getX(), e.getY()))
{
boundingRec = null;
selectedShape = caseFlow;
x2 = e.getX();
y2 = e.getY();
kdX = kdX + x2 - x1;
kdY = kdY + y2 - y1;
x1 = x2;
y1 = y2;
}
}
public void mouseMoved(MouseEvent e)
{
if(singlePallet != null && caseFlow != null && caddyFlow != null && unloadBulk != null
&& prePick != null && module != null && kd != null)
{
if (singlePallet.contains(e.getX(), e.getY()))
{
cur = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
}
else if (caseFlow.contains(e.getX(), e.getY()))
{
cur = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
}
else if (caddyFlow.contains(e.getX(), e.getY()))
{
cur = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
}
else if (unloadBulk.contains(e.getX(), e.getY()))
{
cur = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
}
else if (prePick.contains(e.getX(), e.getY()))
{
cur = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
}
else if (module.contains(e.getX(), e.getY()))
{
cur = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
}
else if (kd.contains(e.getX(), e.getY()))
{
cur = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
}
else
{
cur = Cursor.getDefaultCursor();
}
}
canvas.repaint();
}
}
}
public static void main(String arg[])
{
new DragAndDrop();
}
}
