获取在jpanel上单击的顶点的索引
我想创建一个显示图形并像gephi一样操作它们的应用程序。 我已经编写了一些类，但是我在方法中遇到了问题。 此方法返回我单击的节点的索引。 该方法有效但如果我改变顶点位置（移动）它就不起作用。
//get the id of the vertices but here I have a problem, if the vertices x,y changed I can't get the id anymore.
public int getIndex(){
int i2=-1;
for(int i=0;i<Vnumber;i++)
{
if(gr.s.get(i).x==(dragged.getX()+(radius/2)) && gr.s.get(i).y==(dragged.getY()+(radius/2))){
i2=i;
break;}
else if(cnd)
if(gr.s.get(i).x==(location.getX()+(radius/2)) && gr.s.get(i).y==(location.getY()+(radius/2))){
i2=i;
break;}
}return i2;
}
这是我的课程： Application.java 包图;
import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.geom.Ellipse2D;
import java.util.ArrayList;
import java.util.Random;
import javax.swing.JOptionPane;
public class Application extends javax.swing.JFrame
{
boolean oval,zoom,cnd=false;
static int Vnumber;
int rand;
int radius;
int id;
Random r;
Graph gr;
ArrayList <Ellipse2D> nodes;
private Ellipse2D dragged;
private Point offset;
Point location;
public Application()
{
initComponents();
gr=new Graph();
nodes=new ArrayList<>();
r=new Random();
radius=40;
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
pan = new javax.swing.JPanel(){
@Override
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
int i=0;
if(oval){
DrawCircle(g,i);
}
if(zoom){
DrawCircle(g,i);
}
}
};
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
unarr = new javax.swing.JButton();
Vertices = new javax.swing.JToggleButton();
slider = new javax.swing.JSlider();
Edges = new javax.swing.JButton();
unsom = new javax.swing.JButton();
info = new javax.swing.JLabel();
jMenuBar1 = new javax.swing.JMenuBar();
jMenu1 = new javax.swing.JMenu();
jMenu2 = new javax.swing.JMenu();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
pan.setBackground(new java.awt.Color(255, 255, 255));
pan.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
pan.setForeground(new java.awt.Color(255, 102, 102));
pan.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
panMouseClicked(evt);
}
public void mouseEntered(java.awt.event.MouseEvent evt) {
panMouseEntered(evt);
}
public void mousePressed(java.awt.event.MouseEvent evt) {
panMousePressed(evt);
}
public void mouseReleased(java.awt.event.MouseEvent evt) {
panMouseReleased(evt);
}
});
pan.addComponentListener(new java.awt.event.ComponentAdapter() {
public void componentResized(java.awt.event.ComponentEvent evt) {
panComponentResized(evt);
}
});
pan.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
public void mouseDragged(java.awt.event.MouseEvent evt) {
panMouseDragged(evt);
}
public void mouseMoved(java.awt.event.MouseEvent evt) {
panMouseMoved(evt);
}
});
jPanel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
jPanel1.setName(""); // NOI18N
jLabel1.setForeground(new java.awt.Color(255, 0, 0));
jLabel1.setText("Manuel");
unarr.setText("One Edge");
unarr.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
unarrActionPerformed(evt);
}
});
Vertices.setText("Vertices");
Vertices.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
VerticesActionPerformed(evt);
}
});
slider.setMaximum(85);
slider.setMinimum(20);
slider.setPaintLabels(true);
slider.setPaintTicks(true);
slider.setToolTipText("");
slider.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
public void mouseDragged(java.awt.event.MouseEvent evt) {
sliderMouseDragged(evt);
}
});
Edges.setText("Edges");
unsom.setText("One Vertex");
unsom.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
unsomActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel1)
.addGap(352, 352, 352))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(Vertices, javax.swing.GroupLayout.PREFERRED_SIZE, 111, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(unarr, javax.swing.GroupLayout.PREFERRED_SIZE, 101, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(Edges, javax.swing.GroupLayout.DEFAULT_SIZE, 90, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(unsom, javax.swing.GroupLayout.PREFERRED_SIZE, 105, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(193, 193, 193)))
.addComponent(slider, javax.swing.GroupLayout.DEFAULT_SIZE, 67, Short.MAX_VALUE)
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 7, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(unarr)
.addComponent(Vertices)
.addComponent(Edges)
.addComponent(unsom)))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(slider, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
info.setText("...");
jMenu1.setText("File");
jMenuBar1.add(jMenu1);
jMenu2.setText("Edit");
jMenuBar1.add(jMenu2);
setJMenuBar(jMenuBar1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(pan, javax.swing.GroupLayout.DEFAULT_SIZE, 568, Short.MAX_VALUE)
.addGap(143, 143, 143))
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addComponent(info)
.addGap(0, 0, Short.MAX_VALUE)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(pan, javax.swing.GroupLayout.PREFERRED_SIZE, 359, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(info, javax.swing.GroupLayout.PREFERRED_SIZE, 14, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void panMouseClicked(java.awt.event.MouseEvent evt)
{
}
void DrawCircle(Graphics g,int i)
{
Graphics2D g2d = (Graphics2D) g.create();
for (Ellipse2D node : nodes)
{
g2d.setColor(Color.yellow);
g2d.fill(node);
if (node == dragged)
{
g2d.setColor(Color.BLUE);
g2d.draw(node);
}
g2d.setColor(Color.BLUE);
FontMetrics fm = g.getFontMetrics();
int textWidth = fm.stringWidth(gr.s.get(i).str);
int xx = node.getBounds().x;
int yy = node.getBounds().y;
int width = node.getBounds().width;
int height = node.getBounds().height;
g.drawString(gr.s.get(i).str,
xx + ((width - textWidth)) / 2,
yy + ((height - fm.getHeight()) / 2) + fm.getAscent());
i++;
}
g2d.dispose();
}
private void VerticesActionPerformed(java.awt.event.ActionEvent evt)
{
if(Vertices==evt.getSource())
{
//bouton est cliqué
oval=true;
//gestion exeption si Vnumber est un string ou Vnumber<0
do{
try
{
Vnumber=Integer.parseInt(JOptionPane.showInputDialog("Please Enter vertices number (>0):"));
}
catch(NumberFormatException e)
{
JOptionPane.showMessageDialog(this,"please enter a number !", "Erreur", JOptionPane.ERROR_MESSAGE);
return;
}
}while(Vnumber<=0);
//initialisation arraylist de sommet
for(int i=0; i<Vnumber; i++)
gr.s.add(i,new Vertices(pan.getWidth(),radius));
//initialisation arraylist Ellipse2D (argument serot envoyé a g2d.fill ou autre)
for(int i=0; i<Vnumber; i++)
nodes.add(i,new Ellipse2D.Float(gr.s.get(i).x - (gr.s.get(i).radius / 2),gr.s.get(i).y - (gr.s.get(i).radius / 2),
gr.s.get(i).radius, gr.s.get(i).radius));
repaint();
Vertices.setEnabled(false);
}
}
//get the id of the vertices but here I have a problem, if the vertices x,y changed I can't get the id anymore.
public int getIndex(){
int i2=-1;
for(int i=0;i<Vnumber;i++)
{
if(gr.s.get(i).x==(dragged.getX()+(radius/2)) && gr.s.get(i).y==(dragged.getY()+(radius/2))){
i2=i;
break;}
else if(cnd)
if(gr.s.get(i).x==(location.getX()+(radius/2)) && gr.s.get(i).y==(location.getY()+(radius/2))){
i2=i;
break;}
}return i2;
}
private void panComponentResized(java.awt.event.ComponentEvent evt)
{
}
private void panMouseReleased(java.awt.event.MouseEvent evt)
{
if (dragged != null)
{
repaint();
}
dragged = null;
offset = null;
if(cnd){
gr.s.get(id).x=(int)location.getX()+(gr.s.get(id).radius/2);
gr.s.get(id).y=(int)location.getY()+(gr.s.get(id).radius/2);
//nodes.set(id, new Ellipse2D.Float((int)location.getX()-(gr.s.get(id).radius/2),
//(int)location.getY()-(gr.s.get(id).radius/2),gr.s.get(id).radius,gr.s.get(id).radius));
}
}
private void panMouseDragged(java.awt.event.MouseEvent evt)
{
if (dragged != null && offset != null)
{
//adjust the click
Point to = evt.getPoint();
location=new Point(evt.getPoint());
//new location of the vertex
to.x += offset.x;
to.y += offset.y;
System.out.println("x="+to.x+"/y="+to.y);
//change the position of the vertex
Rectangle bounds = dragged.getBounds();
cnd=true;
//set location
bounds.setLocation(to);
dragged.setFrame(bounds);
repaint();
}
}
public boolean InsideVertices(java.awt.event.MouseEvent evt){
for (Ellipse2D node : nodes)
{
if (node.contains(evt.getPoint()))
{
dragged = node;
//old location of vertex
//if(dragged.getX()+(gr.s.get(i).radius/2)==gr.s.get(i).x&&dragged.getY()+(gr.s.get(i).radius/2)==gr.s.get(i).y)
offset = new Point(node.getBounds().x - evt.getX(), node.getBounds().y - evt.getY());
repaint();
return true;
}
}
//for(int i=0;i<Vnumber;i++)
// gr.s.set(i,new Vertices((int)location.getX(),(int)location.getY(),i));
return false;
}
private void panMousePressed(java.awt.event.MouseEvent evt)
{
System.out.println("x="+evt.getX()+"y="+evt.getY());
if(InsideVertices( evt))
{
info.setText("you are inside vertices , the ID is = "+getIndex());
id=getIndex();
}
else
info.setText("outside vertices!");
}
private void panMouseEntered(java.awt.event.MouseEvent evt)
{
}
private void panMouseMoved(java.awt.event.MouseEvent evt)
{
}
private void sliderMouseDragged(java.awt.event.MouseEvent evt) {
if(slider==evt.getSource())
{
if(id>=0){
gr.s.get(id).radius=slider.getValue();
nodes.set(id,new Ellipse2D.Float(gr.s.get(id).x-(gr.s.get(id).radius/2),gr.s.get(id).y-(gr.s.get(id).radius/2)
,slider.getValue(),slider.getValue()));
}
else
{
gr.s.get(id).radius=slider.getValue();
nodes.set(id,new Ellipse2D.Float((int)location.getX(),(int)location.getY(),slider.getValue(),slider.getValue()));
}
}
repaint();
}
private void unsomActionPerformed(java.awt.event.ActionEvent evt) {
}
private void unarrActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
public static void main(String args[])
{
try
{
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels())
{
if ("Nimbus".equals(info.getName()))
{
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
}
catch (ClassNotFoundException ex)
{
java.util.logging.Logger.getLogger(Application.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
catch (InstantiationException ex)
{
java.util.logging.Logger.getLogger(Application.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
catch (IllegalAccessException ex)
{
java.util.logging.Logger.getLogger(Application.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
catch (javax.swing.UnsupportedLookAndFeelException ex)
{
java.util.logging.Logger.getLogger(Application.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable()
{
public void run()
{
new Application().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton Edges;
private javax.swing.JToggleButton Vertices;
private javax.swing.JLabel info;
private javax.swing.JLabel jLabel1;
private javax.swing.JMenu jMenu1;
private javax.swing.JMenu jMenu2;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel pan;
private javax.swing.JSlider slider;
private javax.swing.JButton unarr;
private javax.swing.JButton unsom;
// End of variables declaration
}
Graph.java
package graph;
import java.util.ArrayList;
public class Graph {
ArrayList <Vertices> v;
ArrayList <Edges> e;
ArrayList <Boolean> matrix;
Graph(){
e=new ArrayList<>();
v=new ArrayList<>();
//allocation matrix
}
Graph( ArrayList <Vertices> ee, ArrayList <Edges> vv){
e=new ArrayList<>(ee);
v=new ArrayList<>(vv);
}
Graph( ArrayList <Vertices> vv){
v=new ArrayList<>(vv);
}
}
Vertices.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package graph;
import java.util.ArrayList;
public class Vertices
{
static int id = 0;
int x;
int y;
String str;
int radius;
Vertices()
{
int Min=200;
int Max=800;
x= Min + (int)(Math.random() * ((Max - Min) + 1));
y= Min + (int)(Math.random() * ((Max - Min) + 1));
str= "S" + (id++);
radius= 50;
}
Vertices(int w,int r)
{
int Min=20;
int Max=w-100;
x= Min + (int)(Math.random() * ((Max - Min) + 1));
y= Min + (int)(Math.random() * ((Max - Min) + 1));
str= "S" + (id++);
radius= r;
}
Vertices(int x,int y,int i)
{
this.x=x;
this.y=y;
id=i;
str="s"+id;
}
//formule random : var= Min + (int)(Math.random() * ((Max - Min) + 1));
Vertices(Vertices s)
{
x=s.x;
y= s.y;
str = s.str;
// radius = s.radius;
id=(s.id)++;
}
void Reset()
{
id=0;
}
}
1 个答案:
答案 0 :(得分：0)
我认为忘记在查找顶点后更新顶点的位置。 Vertices.java不包含更新位置的方法，如setter或其他东西。如果你试图通过getter从另一个类访问类变量，你只能获得它的值的副本，而不是实际的变量。
有点难以确定错误的确切位置。你能提供一个最小的例子吗？
修改
你的变量名很糟糕......在Graph.java源代码中是主要的。
<强> REDIT：
if(cnd){
gr.s.get(id).x=(int)location.getX()+(gr.s.get(id).radius/2);
gr.s.get(id).y=(int)location.getY()+(gr.s.get(id).radius/2);
}
如果我有了正确的想法，你试图从图中得到一个带有特殊id的点，但gr.s.get（id）.x按值返回一个整数，你只是覆盖它在副本中的值，而不是在实际图表中。您需要为要更改的点获取一个getter，然后更改x和y变量的值。
顺便说一下：外语不是坏变量名的借口。这些名字可以代表什么。另外我无法弄清楚gr.s应该是什么......
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