Java在绘制线条时使用jpanel和jscrollpane
我开发了一个可视化连接Java组件的软件解决方案,效果很好。我现在唯一的问题是我的仪表板被一个jscrollpane包围,这很好。但是,如果我离开仪表板,使jscrollpane必须增长,那么所有用于连接组件的线都会从它们的位置移动。我已经搜索了一些方法来获取jscollpane的真实屏幕大小,但没有找到任何结果 要在需要时扩展jscrollpane,我使用:Java在绘制线条时使用jpanel和jscrollpane,java,swing,user-interface,jpanel,jscrollpane,Java,Swing,User Interface,Jpanel,Jscrollpane,我开发了一个可视化连接Java组件的软件解决方案,效果很好。我现在唯一的问题是我的仪表板被一个jscrollpane包围,这很好。但是,如果我离开仪表板,使jscrollpane必须增长,那么所有用于连接组件的线都会从它们的位置移动。我已经搜索了一些方法来获取jscollpane的真实屏幕大小,但没有找到任何结果 要在需要时扩展jscrollpane,我使用: Point p = (mainPanel.getMousePosition()); if(mainPanel.getWidth() -
Point p = (mainPanel.getMousePosition());
if(mainPanel.getWidth() - (p.x) < tmp.getWidth() && mainPanel.getHeight() - (p.y) < tmp.getHeight())
{
dim = new Dimension(dim.width+(mainPanel.getWidth()-p.x),dim.height+mainPanel.getHeight() - (p.y));
}
else if(mainPanel.getHeight() - (p.y) < tmp.getHeight())
{
dim = new Dimension(dim.width,dim.height+mainPanel.getHeight() - (p.y));
}
else if(mainPanel.getWidth() - (p.x) < tmp.getWidth())
{
dim = new Dimension(dim.width+(mainPanel.getWidth()-p.x),dim.height);
}
mainPanel.setPreferredSize(dim);
p点=(mainPanel.getMousePosition());
if(mainPanel.getWidth()-(p.x)
当鼠标被拖动时
因此,我需要在jscrollpane中获得左上角点的坐标,以计算新的坐标或将直线向后移动的东西
要绘制我使用的线:
@Override
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// test
Line2D tmp_line;
for (int i = 0; i < abuttons.size(); i++) {
// System.out.println(abuttons.get(i).out);
if (abuttons.get(i).out != null) {
int x1 = abuttons.get(i).getLocation().x
+ abuttons.get(i).connectBtn_right.getLocation().x
+ 12;
int y1 = abuttons.get(i).getLocation().y
+ abuttons.get(i).connectBtn_right.getLocation().y
+ 9 + 75;
int x2 = abuttons.get(i).out.getLocation().x
+ abuttons.get(i).out.connectBtn_left.getLocation().x
+ 12;
int y2 = abuttons.get(i).out.getLocation().y
+ abuttons.get(i).out.connectBtn_left.getLocation().y
+ 9 + 75;
tmp_line = new Line2D.Double(x1, y1, x2, y2);
g2d.setPaint(Color.BLACK);
g2d.setStroke(new BasicStroke(1.5f));
g2d.draw(tmp_line);
}
}
if (point1 != null && point2 != null) {
line2d = new Line2D.Double(point1, point2);
g2d.setPaint(Color.RED);
g2d.setStroke(new BasicStroke(1.5f));// set stroke size
g2d.draw(line2d);
}
}
@覆盖
公共空间涂料(图g){
超级油漆(g);
Graphics2D g2d=(Graphics2D)g;
g2d.setRenderingHint(RenderingHints.KEY_抗锯齿,
RenderingHints.VALUE_ANTIALIAS_ON);
//试验
Line2D tmp_线;
对于(int i=0;i
谢谢你的帮助
以下是SSCCE:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JScrollPane;
import javax.swing.JButton;
public class LineDraw extends JFrame {
private JPanel contentPane;
JScrollPane scrollPane = new JScrollPane();
JPanel panel = new JPanel();
JButton btnNewButton = new JButton("New button");
JButton btnNewButton_1 = new JButton("New button");
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
LineDraw frame = new LineDraw();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public LineDraw() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
scrollPane.setBounds(0, 0, 424, 251);
contentPane.add(scrollPane);
scrollPane.setViewportView(panel);
panel.setLayout(null);
btnNewButton.setBounds(27, 98, 89, 23);
panel.add(btnNewButton);
btnNewButton_1.setBounds(213, 137, 89, 23);
panel.add(btnNewButton_1);
initListener();
}
private void initListener()
{
btnNewButton.addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseDragged(MouseEvent me) {
super.mouseDragged(me);
Point pos = panel.getMousePosition();
System.out.println(pos);
if(panel.getWidth()-pos.x<50 && panel.getHeight()-pos.y<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth()+50,panel.getHeight()+50));
}
else if(panel.getHeight()-pos.y<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth(),panel.getHeight()+50));
}
else if(panel.getWidth()-pos.x<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth()+50,panel.getHeight()));
}
btnNewButton.setLocation(pos);
repaint();
validate();
}
});
btnNewButton_1.addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseDragged(MouseEvent me) {
super.mouseDragged(me);
Point pos = panel.getMousePosition();
if(panel.getWidth()-pos.x<50 && panel.getHeight()-pos.y<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth()+50,panel.getHeight()+50));
}
else if(panel.getHeight()-pos.y<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth(),panel.getHeight()+50));
}
else if(panel.getWidth()-pos.x<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth()+50,panel.getHeight()));
}
btnNewButton_1.setLocation(panel.getMousePosition());
repaint();
validate();
}
});
}
@Override
public void paint(Graphics g)
{
super.paint(g);
g.drawLine(btnNewButton.getLocation().x+10,btnNewButton.getLocation().y+32, btnNewButton_1.getLocation().x+10,btnNewButton_1.getLocation().y+32);
}
}
导入java.awt.BorderLayout;
导入java.awt.Dimension;
导入java.awt.EventQueue;
导入java.awt.Graphics;
导入java.awt.Point;
导入java.awt.event.MouseAdapter;
导入java.awt.event.MouseEvent;
导入javax.swing.JFrame;
导入javax.swing.JPanel;
导入javax.swing.border.EmptyBorder;
导入javax.swing.JScrollPane;
导入javax.swing.JButton;
公共类LineDraw扩展了JFrame{
私有JPanel内容窗格;
JScrollPane scrollPane=新的JScrollPane();
JPanel面板=新的JPanel();
JButton btnNewButton=新JButton(“新按钮”);
JButton btnNewButton_1=新JButton(“新按钮”);
/**
*启动应用程序。
*/
公共静态void main(字符串[]args){
invokeLater(新的Runnable(){
公开募捐{
试一试{
LineDraw框架=新建LineDraw();
frame.setVisible(true);
}捕获(例外e){
e、 printStackTrace();
}
}
});
}
/**
*创建框架。
*/
公共划线(){
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
立根(100100450300);
contentPane=newjpanel();
setboorder(新的EmptyBorder(5,5,5,5));
setContentPane(contentPane);
contentPane.setLayout(null);
滚动窗格.setBounds(0,0424251);
添加(滚动窗格);
scrollPane.setViewportView(面板);
panel.setLayout(空);
btnNewButton.setBounds(27,98,89,23);
面板。添加(BtnewButton);
btnNewButton_1.立根(213、137、89、23);
面板。添加(btnNewButton_1);
initListener();
}
私有void initListener()
{
addMouseMotionListener(新的MouseAdapter(){
@凌驾
公共无效鼠标标记(MouseEvent me){
超级。鼠标标记(我);
Point pos=panel.getMousePosition();
系统输出打印项次(pos);
如果(panel.getWidth()-pos.x覆盖panel
的paintComponent()
,而不是JFrame的paint()
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
import java.awt.event.*;
public class LineDraw extends JFrame {
private JPanel contentPane;
JScrollPane scrollPane = new JScrollPane();
JPanel panel = new JPanel(){
@Override
public void paintComponent(Graphics g)
{
super.paintComponent(g);
g.drawLine(btnNewButton.getLocation().x,btnNewButton.getLocation().y, btnNewButton_1.getLocation().x,btnNewButton_1.getLocation().y);
}
};
JButton btnNewButton = new JButton("New button");
JButton btnNewButton_1 = new JButton("New button");
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
LineDraw frame = new LineDraw();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public LineDraw() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
scrollPane.setBounds(0, 0, 424, 251);
contentPane.add(scrollPane);
scrollPane.setViewportView(panel);
panel.setLayout(null);
btnNewButton.setBounds(27, 98, 89, 23);
panel.add(btnNewButton);
btnNewButton_1.setBounds(213, 137, 89, 23);
panel.add(btnNewButton_1);
initListener();
}
private void initListener()
{
btnNewButton.addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseDragged(MouseEvent me) {
super.mouseDragged(me);
Point pos = panel.getMousePosition();
System.out.println(pos);
if(panel.getWidth()-pos.x<50 && panel.getHeight()-pos.y<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth()+50,panel.getHeight()+50));
}
else if(panel.getHeight()-pos.y<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth(),panel.getHeight()+50));
}
else if(panel.getWidth()-pos.x<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth()+50,panel.getHeight()));
}
btnNewButton.setLocation(pos);
validate();
repaint();
}
});
btnNewButton_1.addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseDragged(MouseEvent me) {
super.mouseDragged(me);
Point pos = panel.getMousePosition();
if(panel.getWidth()-pos.x<50 && panel.getHeight()-pos.y<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth()+50,panel.getHeight()+50));
}
else if(panel.getHeight()-pos.y<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth(),panel.getHeight()+50));
}
else if(panel.getWidth()-pos.x<50)
{
panel.setPreferredSize(new Dimension(panel.getWidth()+50,panel.getHeight()));
}
btnNewButton_1.setLocation(panel.getMousePosition());
validate();
repaint();
}
});
}
}
import javax.swing.*;
导入javax.swing.border.EmptyBorder;
导入java.awt.*;
导入java.awt.event.*;
公共类LineDraw扩展了JFrame{
私有JPanel内容窗格;
JScrollPane scrollPane=新的JScrollPane();
JPanel面板=新的JPanel(){
@凌驾
公共组件(图形g)
{
超级组件(g);
g、 抽绳(btnNewButton.getLocation().x,btnNewButton.getLocation().y,btnNewButton_1.getLocation().x,btnNewButton_1.getLocation().y);
}
};
JButton btnNewButton=新JButton(“新按钮”);
JButton btnNewButton_1=新JButton(“新按钮”);
/**
*启动应用程序。
*/
公共静态void main(字符串[]args){
invokeLater(新的Runnable(){
公开募捐{
试一试{
LineDraw框架=新建LineDraw();
frame.setVisible(true);
}捕获(例外e){
e、 printStackTrace();
}
}
});
}
/**
*创建框架。
*/
公共划线(){