本文介绍了如何解决错位的BoxLayout？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想在一个JPanel与框布局添加多个JLabel对齐，但我对自己的设置面临setAlignmentX prolems（）。我要的定做一个例子从文本泡沫边框这个网站，并试图拉出来，从它的一些例子。在JPanel，然后在JScrollPane中添加。
I'm trying to add multiple Jlabels in a Jpanel with Box layout, But i'm facing prolems on setting their setAlignmentX() . I'm reffering to an example from this site of Text bubble border and trying to pull out some examples from it. The jpanel is then added in Jscrollpane.
我的code是这里！
//Source :Andrew Thompson
class TextBubbleBorder extends AbstractBorder {
private Color color;
private int thickness = 4;
private int radii = 8;
private int pointerSize = 7;
private Insets insets = null;
private BasicStroke stroke = null;
private int strokePad;
private int pointerPad = 4;
private boolean left = true;
RenderingHints hints;
TextBubbleBorder(
Color color) {
new TextBubbleBorder(color, 4, 8, 7);
}
TextBubbleBorder(
Color color, int thickness, int radii, int pointerSize) {
this.thickness = thickness;
this.radii = radii;
this.pointerSize = pointerSize;
this.color = color;
stroke = new BasicStroke(thickness);
strokePad = thickness / 2;
hints = new RenderingHints(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int pad = radii + strokePad;
int bottomPad = pad + pointerSize + strokePad;
insets = new Insets(pad, pad, bottomPad, pad);
}
TextBubbleBorder(
Color color, int thickness, int radii, int pointerSize, boolean left) {
this(color, thickness, radii, pointerSize);
this.left = left;
}
@Override
public Insets getBorderInsets(Component c) {
return insets;
}
@Override
public Insets getBorderInsets(Component c, Insets insets) {
return getBorderInsets(c);
}
@Override
public void paintBorder(
Component c,
Graphics g,
int x, int y,
int width, int height) {
Graphics2D g2 = (Graphics2D) g;
int bottomLineY = height - thickness - pointerSize;
RoundRectangle2D.Double bubble = new RoundRectangle2D.Double(
0 + strokePad,
0 + strokePad,
width - thickness,
bottomLineY,
radii,
radii);
Polygon pointer = new Polygon();
if (left) {
// left point
pointer.addPoint(
strokePad + radii + pointerPad,
bottomLineY);
// right point
pointer.addPoint(
strokePad + radii + pointerPad + pointerSize,
bottomLineY);
// bottom point
pointer.addPoint(
strokePad + radii + pointerPad + (pointerSize / 2),
height - strokePad);
} else {
// left point
pointer.addPoint(
width - (strokePad + radii + pointerPad),
bottomLineY);
// right point
pointer.addPoint(
width - (strokePad + radii + pointerPad + pointerSize),
bottomLineY);
// bottom point
pointer.addPoint(
width - (strokePad + radii + pointerPad + (pointerSize / 2)),
height - strokePad);
}
Area area = new Area(bubble);
area.add(new Area(pointer));
g2.setRenderingHints(hints);
// Paint the BG color of the parent, everywhere outside the clip
// of the text bubble.
Component parent = c.getParent();
if (parent!=null) {
Color bg = parent.getBackground();
Rectangle rect = new Rectangle(0,0,width, height);
Area borderRegion = new Area(rect);
borderRegion.subtract(area);
g2.setClip(borderRegion);
g2.setColor(bg);
g2.fillRect(0, 0, width, height);
g2.setClip(null);
}
g2.setColor(color);
g2.setStroke(stroke);
g2.draw(area);
}}
//TextBubbleBorder ends here
MSGBOX从这里开始
Msgbox starts here
class msgbox extends JPanel {
boolean ij = true;
String msg = "";
JLabel jl;
msgbox() {
// msgpnl();
}
msgbox(String str, boolean bj) {
ij = bj;
msg = str;
msgpnl();
}
/* public void setText(String str, boolean bj){
ij=bj;
msg=str;
msgpnl();
}
*/
public void msgpnl() {
//setLayout(new GridLayout(0, 1));
this.setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
if (ij) {
jl = new JLabel(msg);
jl.setOpaque(true);
jl.setBorder(new TextBubbleBorder(Color.LIGHT_GRAY, 1, 10, 7, ij));
jl.setBackground(new Color(123, 104, 238));
jl.setAlignmentX(0);
} else {
jl = new JLabel(msg, SwingConstants.RIGHT);
jl.setOpaque(true);
jl.setBorder(new TextBubbleBorder(Color.LIGHT_GRAY, 1, 10, 7, ij));
jl.setBackground(new Color(224, 102, 255));
jl.setAlignmentX(1);
}
this.add(jl);
System.out.print("\nThis executed");
}
}
chatpanel
chatpanel
class chatpanel extends JScrollPane {
static JPanel jp;
chatpanel() {
this.setVisible(true);
//this.setLayout(null);
this.jp = new JPanel();
this.jp.setLayout(new BoxLayout(this.jp, BoxLayout.Y_AXIS));
//jp= new JPanel( new GridLayout(0, 1,0,5));
//this.setLayout(new GridLayout(1,1));
this.getViewport().add(jp);
jp.setVisible(true);
setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
}
public void addmsg(Component co) {
//msgscp.add(co);
//co.setSize(100, 30);
jp.add(co);
}
public static void main(String args[]) {
JFrame jf = new JFrame("Testing msgpanel");
jf.setLayout(new GridLayout(0, 1, 0, 0));
chatpanel cp = new chatpanel();
JButton jb = new JButton("new");
msgbox mb;
mb = new msgbox("<html><body style='width: 200px; padding: 5px;'>"
+ "<h1>Do U C Me?</h1>"
+ "Here is a long string that will wrap. "
+ "The effect we want is a multi-line label.", true);
// mb.setText();
cp.addmsg(mb);
msgbox mb2 = new msgbox("Hello 2", false);
cp.addmsg(mb2);
jb.setSize(100, 30);
jf.add(cp);
//jf.add(jb);
jf.setSize(400, 400);
//jf.pack();
jf.setVisible(true);
}
}
另外，我想我会面临的问题，同时结束了文本的JLabel，虽然我在chatpanel使用HTML包装技术。不会是effecient不断变化msgboxes尺寸!!预先感谢帮助！
Plus i think i will face problem while wrapping up text in Jlabel, although i used HTML wrapping technique in chatpanel. that will not be effecient with changing sizes of msgboxes!! thanks in advance for help!!
推荐答案
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
public class ChatPanel {
private JFrame jf = new JFrame("Testing msgpanel");
private JScrollPane scroll = new JScrollPane();
private JPanel jp;
private ChatPaneMsgBox mb;
private ChatPaneMsgBox mb2;
private JPanel cp = new JPanel();
private JButton jb = new JButton(" ME !!! ");
private JButton jb1 = new JButton(" YOU !!! ");
public ChatPanel() {
jp = new JPanel();
jp.setLayout(new BoxLayout(jp, BoxLayout.Y_AXIS));
mb = new ChatPaneMsgBox("<html><body style='width: 200px; padding: 5px;'>"
+ "<h1>Do U C Me?</h1>"
+ "Here is a long string that will wrap. "
+ "The effect we want is a multi-line label.", true);
addmsg(mb);
mb2 = new ChatPaneMsgBox("Hello 2", false);
addmsg(mb2);
scroll.setViewportView(jp);
scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
scroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
jb.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
mb = new ChatPaneMsgBox("<html><body style='width: 200px; padding: 5px;'>"
+ "<h1>Do U C Me?</h1>"
+ "Here is a long string that will wrap. "
+ "The effect we want is a multi-line label.", true);
addmsg(mb);
Rectangle rect = jp.getBounds();
Rectangle r2 = scroll.getViewport().getVisibleRect();
jp.scrollRectToVisible(new Rectangle((int) rect.getWidth(),
(int) rect.getHeight(), (int) r2.getWidth(), (int) r2.getHeight()));
}
});
jb1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
mb2 = new ChatPaneMsgBox("Hello 2", false);
addmsg(mb2);
Rectangle rect = jp.getBounds();
Rectangle r2 = scroll.getViewport().getVisibleRect();
jp.scrollRectToVisible(new Rectangle((int) rect.getWidth(),
(int) rect.getHeight(), (int) r2.getWidth(), (int) r2.getHeight()));
}
});
cp.add(jb);
cp.add(jb1);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.add(scroll);
jf.add(cp, BorderLayout.SOUTH);
jf.setSize(400, 400);
jf.setVisible(true);
}
private void addmsg(Component co) {
jp.add(co);
jp.revalidate();
jp.repaint();
}
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new ChatPanel();
}
});
}
}
import java.awt.Color;
import javax.swing.BoxLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
class ChatPaneMsgBox extends JPanel {
boolean ij = true;
private String msg = "";
private JLabel jl;
public ChatPaneMsgBox() {
}
public ChatPaneMsgBox(String str, boolean bj) {
ij = bj;
msg = str;
msgpnl();
}
private void msgpnl() {
this.setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
if (ij) {
jl = new JLabel(msg);
jl.setOpaque(true);
jl.setBorder(new TextBubbleBorder(Color.LIGHT_GRAY, 1, 10, 7, ij));
jl.setBackground(new Color(123, 104, 238));
jl.setAlignmentX(0);
} else {
jl = new JLabel(msg, SwingConstants.RIGHT);
jl.setOpaque(true);
jl.setBorder(new TextBubbleBorder(Color.LIGHT_GRAY, 1, 10, 7, ij));
jl.setBackground(new Color(224, 102, 255));
jl.setAlignmentX(1);
}
this.add(jl);
System.out.print("\nThis executed");
}
}
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.geom.Area;
import java.awt.geom.RoundRectangle2D;
import javax.swing.border.AbstractBorder;
class TextBubbleBorder extends AbstractBorder {
private Color color;
private int thickness = 4;
private int radii = 8;
private int pointerSize = 7;
private Insets insets = null;
private BasicStroke stroke = null;
private int strokePad;
private int pointerPad = 4;
private boolean left = true;
RenderingHints hints;
TextBubbleBorder(Color color) {
new TextBubbleBorder(color, 4, 8, 7);
}
TextBubbleBorder(Color color, int thickness, int radii, int pointerSize) {
this.thickness = thickness;
this.radii = radii;
this.pointerSize = pointerSize;
this.color = color;
stroke = new BasicStroke(thickness);
strokePad = thickness / 2;
hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int pad = radii + strokePad;
int bottomPad = pad + pointerSize + strokePad;
insets = new Insets(pad, pad, bottomPad, pad);
}
TextBubbleBorder(Color color, int thickness, int radii, int pointerSize, boolean left) {
this(color, thickness, radii, pointerSize);
this.left = left;
}
@Override
public Insets getBorderInsets(Component c) {
return insets;
}
@Override
public Insets getBorderInsets(Component c, Insets insets) {
return getBorderInsets(c);
}
@Override
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
Graphics2D g2 = (Graphics2D) g;
int bottomLineY = height - thickness - pointerSize;
RoundRectangle2D.Double bubble = new RoundRectangle2D.Double(
0 + strokePad,
0 + strokePad,
width - thickness,
bottomLineY,
radii,
radii);
Polygon pointer = new Polygon();
if (left) {
// left point
pointer.addPoint(
strokePad + radii + pointerPad,
bottomLineY);
// right point
pointer.addPoint(
strokePad + radii + pointerPad + pointerSize,
bottomLineY);
// bottom point
pointer.addPoint(
strokePad + radii + pointerPad + (pointerSize / 2),
height - strokePad);
} else {
// left point
pointer.addPoint(
width - (strokePad + radii + pointerPad),
bottomLineY);
// right point
pointer.addPoint(
width - (strokePad + radii + pointerPad + pointerSize),
bottomLineY);
// bottom point
pointer.addPoint(
width - (strokePad + radii + pointerPad + (pointerSize / 2)),
height - strokePad);
}
Area area = new Area(bubble);
area.add(new Area(pointer));
g2.setRenderingHints(hints);
// Paint the BG color of the parent, everywhere outside the clip
// of the text bubble.
Component parent = c.getParent();
if (parent != null) {
Color bg = parent.getBackground();
Rectangle rect = new Rectangle(0, 0, width, height);
Area borderRegion = new Area(rect);
borderRegion.subtract(area);
g2.setClip(borderRegion);
g2.setColor(bg);
g2.fillRect(0, 0, width, height);
g2.setClip(null);
}
g2.setColor(color);
g2.setStroke(stroke);
g2.draw(area);
}
}
这篇关于如何解决错位的BoxLayout？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！