[英]Add JPanel dynamically Swing
嗨,我想拥有以下用户界面:
当用户点击start时 ,我想在这些元素下动态添加JPanel
。 像这样的东西:
我能够在一个空的JFrame
生成网格,但是当我尝试添加它时, JFrame
有更多的元素会出现,但非常小。
这是我试过的代码。 UITable
类创建按钮和输入文本
public UITable(){
jfrm = new JFrame("Plants experiment");
jfrm.setLayout(new FlowLayout());
jfrm.setSize(1000, 1000);
jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//JLabel titles for input texts
JLabel jlab_plants = new JLabel(" Enter nº plants: ");
JLabel jlab_time = new JLabel(" Enter evolution time: ");
jlab_prueba = new JLabel("");
//Input texts
jtf_plants = new JTextField(10);
jtf_plants.setActionCommand("numPlants");
jtf_time = new JTextField(10);
jtf_time.setActionCommand("time");
//Buttons
jbtnStart = new JButton("Start");
//Add components
jfrm.add(jlab_plants);
jfrm.add(jtf_plants);
jfrm.add(jlab_time);
jfrm.add(jtf_time);
jfrm.add(jbtnStart);
jfrm.add(jlab_prueba);
//Set visibility
jfrm.setVisible(true);
}
动态添加网格:
@Override
public void actionPerformed(ActionEvent ae) {
// ...
this.view.jfrm.add(new Grid());
this.view.jfrm.revalidate();
this.view.jfrm.repaint();
}
这是Grid类:
public class Grid extends JPanel{
//Change Point to Plant in order to have a different color for each object
private List<Plant> fillCells;
public Grid() {
//fillCells = new ArrayList<>(25);
fillCells = PlantsControler.myPlants;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
System.out.println("Width: "+getWidth()+" Height: "+ getHeight());
---- //Returns Width: 10 Height: 10 ------
g.clearRect(0, 0, getWidth(), getHeight());
for (Plant fillCell : fillCells) {
int cellX = 10 + (fillCell.getX() * 10);
int cellY = 10 + (fillCell.getY() * 10);
g.setColor(fillCell.getColor());
g.fillRect(cellX, cellY, 10, 10);
}
g.setColor(Color.BLACK);
g.drawRect(10, 10, 800, 500);
for (int i = 10; i <= 800; i += 10) {
g.drawLine(i, 10, i, 510);
}
for (int i = 10; i <= 500; i += 10) {
g.drawLine(10, i, 810, i);
}
}
public void fillCell(int x, int y, Color color) {
fillCells.add(new Plant(x, y, color));
repaint();
}
public void fillCell(Plant plant){
fillCells.add(plant);
repaint();
}
public void fillCell(){
repaint();
}
public void clearGrid(){
fillCells.clear();
}
提前致谢!!!
你可以试试下面的东西。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class DemoFrame extends JFrame {
JTextField field = new JTextField();
public DemoFrame() {
setLayout(new BorderLayout());
JPanel controlsPane = new JPanel(new FlowLayout());
controlsPane.add(new JLabel("I m a Label"));
field.setPreferredSize(new Dimension(100,20));
controlsPane.add(field);
JButton button = new JButton("I am add drawPanel");
controlsPane.add(button);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent paramActionEvent) {
DemoFrame.this.add(new DrawPanel(), BorderLayout.CENTER);
DemoFrame.this.revalidate();
}
});
add(controlsPane,BorderLayout.NORTH);
}
public static void main(String[] args) {
DemoFrame frame = new DemoFrame();
frame.setVisible(true);
frame.pack();
}
class DrawPanel extends JPanel {
@Override
protected void paintComponent(Graphics g) {
// TODO Auto-generated method stub
super.paintComponent(g);
g.setColor(Color.BLUE);
g.drawString(field.getText(), this.getWidth()/2, this.getHeight()/2);
}
}
}
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