[英]Paint program in Java. JPanel Refreshes badly
大家好,我對程序沒有幾個問題:首先,我制作了2個JPanels,並將它們添加到帶有BorderLayout Center和East的主窗口中。
程序看起來像這樣,但是當我開始繪制某些東西時,我的菜單出現在“中心邊框布局”上並不知道為什么。
另外,當我最小化或更改Window大小時,圖形消失:/。
第三件事,我只能畫一條多邊形線(“Łamana”),我也不知道如何使它畫一條簡單的線(“ Prosta”)。 Atm Prosta與Łamana相同。
另外,有時它會畫一些形狀(例如“Koło”),例如圓形。
我的代碼:
主要
import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class edytor extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
public static String jaki, co = null;
public static int jak, jak1;
final static float dash1[] = { 10.0f };
final static BasicStroke dashed = new BasicStroke(1.0f,
BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f, dash1, 0.0f);
public edytor() throws HeadlessException {
super("PAINT");
setLayout(new BorderLayout());
setSize(840, 702);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
jak = 10;
co = "Łamana";
jaki = "Czarny";
JButton zapis = new JButton("Zapis");
zapis.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
}
});
JPanel prawyPanel = new JPanel(new GridLayout(5, 0));
JPanel lewyPanel = new rysowanie();
lewyPanel.setVisible(true);
prawyPanel.setVisible(true);
final JComboBox<String> coRysujemy = new JComboBox<String>();
coRysujemy.setEditable(true);
coRysujemy.addItem("Łamana");
coRysujemy.addItem("Kwadrat");
coRysujemy.addItem("Koło");
coRysujemy.addItem("Prosta");
prawyPanel.add(coRysujemy);
coRysujemy.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
co = (String) coRysujemy.getSelectedItem();
}
});
final JComboBox<String> jakiKolor = new JComboBox<String>();
jakiKolor.setEditable(true);
jakiKolor.addItem("Czarny");
jakiKolor.addItem("Niebieski");
jakiKolor.addItem("Zielony");
prawyPanel.add(jakiKolor);
jakiKolor.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jaki = (String) jakiKolor.getSelectedItem();
}
});
final JComboBox<String> jakGrube = new JComboBox<String>();
jakGrube.setEditable(true);
jakGrube.addItem("10");
jakGrube.addItem("20");
jakGrube.addItem("30");
prawyPanel.add(jakGrube);
jakGrube.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jak = jakGrube.getSelectedIndex();
}
});
final JComboBox<String> jakRysowane = new JComboBox<String>();
jakRysowane.setEditable(true);
jakRysowane.addItem("Nie Przerywane");
jakRysowane.addItem("Przerywane");
prawyPanel.add(jakRysowane);
prawyPanel.add(zapis);
lewyPanel.setBackground(Color.WHITE);
add(lewyPanel, BorderLayout.CENTER);
add(prawyPanel, BorderLayout.EAST);
jakRysowane.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
jak1 = jakRysowane.getSelectedIndex();
}
});
}
public static void main(String[] args) {
edytor ramka = new edytor();
ramka.setVisible(true);
}
}
繪圖窗口面板
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JPanel;
public class rysowanie extends JPanel {
/**
*
*/
private static final long serialVersionUID = 636480153152364773L;
private int squareX;
private int squareY;
private int squareW;
private int squareH;
private int xstart, ystart, xend, yend;
public rysowanie() {
// TODO Auto-generated constructor stub
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
if (edytor.jak == 1) {
edytor.jak = 10;
}
if (edytor.jak == 2) {
edytor.jak = 20;
}
if (edytor.jak == 3) {
edytor.jak = 30;
}
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
squareX = e.getX();
squareY = e.getY();
repaint();
}
public void mouseReleased(MouseEvent e) {
if (e.getX() > squareX)
squareW = e.getX() - squareX;
else {
squareW = squareX - e.getX();
squareX = e.getX();
}
if (e.getY() > squareY)
squareH = e.getY() - squareY;
else {
squareH = squareY - e.getY();
squareY = e.getY();
}
repaint();
}
});
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
xstart = e.getX();
ystart = e.getY();
repaint();
}
public void mouseReleased(MouseEvent e) {
xend = e.getX();
yend = e.getY();
repaint();
}
});
if (edytor.co == "Kwadrat") {
if (edytor.jaki == "Niebieski") {
g.setColor(Color.BLUE);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawRect(squareX, squareY, squareW, squareH);
}
if (edytor.co == "Czarny") {
g.setColor(Color.BLACK);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawRect(squareX, squareY, squareW, squareH);
}
if (edytor.jaki == "Zielony") {
g.setColor(Color.GREEN);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawRect(squareX, squareY, squareW, squareH);
}
}
if (edytor.co == "Łamana") {
if (edytor.jaki == "Niebieski") {
g.setColor(Color.BLUE);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g2.drawLine(xstart, ystart, xend, yend);
}
if (edytor.jaki == "Czarny") {
g.setColor(Color.BLACK);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawLine(xstart, ystart, xend, yend);
}
if (edytor.jaki == "Zielony") {
g.setColor(Color.GREEN);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawLine(xstart, ystart, xend, yend);
}
}
if (edytor.co == "Koło") {
if (edytor.jaki == "Niebieski") {
g.setColor(Color.BLUE);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawOval(squareX, squareY, squareW, squareH);
}
if (edytor.jaki == "Czarny") {
g.setColor(Color.BLACK);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawOval(squareX, squareY, squareW, squareH);
}
if (edytor.jaki == "Zielony") {
g2.setColor(Color.GREEN);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g2.drawOval(squareX, squareY, squareW, squareH);
}
}
if (edytor.co == "Prosta") {
if (edytor.jaki == "Niebieski") {
g.setColor(Color.BLUE);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g2.drawLine(xstart, ystart, xend, yend);
}
if (edytor.jaki == "Czarny") {
g.setColor(Color.BLACK);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawLine(xstart, ystart, xend, yend);
}
if (edytor.jaki == "Zielony") {
g.setColor(Color.GREEN);
g2.setStroke(new BasicStroke(edytor.jak));
if (edytor.jak1 == 1) {
g2.setStroke(edytor.dashed);
}
g.drawLine(xstart, ystart, xend, yend);
}
}
}
}
希望有任何提示。
當您通過不通過paint
方法調用super.paint()
來中斷繪制鏈時,就會發生這種情況。 您所看到的是由於不清除繪畫區域而留下的怪異的繪畫工件(通過調用super.paint()
)
而不是覆蓋paint()
,而應該覆蓋paintComponent
。
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
}
注意:當你調用super.paint[Component]
,這也將清除繪制的前行,這可能不是你想要的功能。 您可以選擇以下幾種方法:
您可以創建Point2D
對象的List
,將點添加到列表中,並遍歷paintComponent
方法中的列表以繪制點到點的線。
您可以將每條線繪制到BufferedImage
並在paintComponent
方法中繪制圖像。
也不要將字符串與==
進行比較。 使用eqauls()
。 Google How do I compare Strings in Java
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