在秋千上圆滑的圆角
我想为我的挥杆应用做出光滑的圆角，但我无法得到我想要的结果...
这是截图：
1。setShape()表示JFrame：
2.替换JPanel的paintComponent()方法而非使用setShape()：
3. setBackground(new Color(0, 0, 0, 0))对于JFrame：
嗯，但文字质量存在问题：
在第3步之前：
在第3步之后：
这里是完整的代码：
public class WelcomePage extends JFrame {
private Point initialClick;
private boolean end = false;
private JLabel jLabelAppTitle;
private JPanel jPanelExit;
private JLabel jLabelHint;
private int r = 220, g = 0, b = 0;
private int r2 = 10, g2 = 10, b2 = 10;
private boolean flag = false;
public WelcomePage() {
initComponents();
// setShape(new RoundRectangle2D.Double(0, 0, getWidth(), getHeight(), 15, 15));
centerLocation();
refreshPage();
}
public static void main(String args[]) {
try {
for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e) {
e.printStackTrace();
}
EventQueue.invokeLater(() -> FadeTransitions.fadeIn(new WelcomePage(), FadeTransitions.NORMAL_FADE, true));
}
private void refreshPage() {
Timer timer = new Timer(20, e -> {
if (!end) {
if (r == 220 && b == 0 && g < 220) {
g++;
} else if (g == 220 && b == 0 && r > 0) {
r--;
} else if (g == 220 && r == 0 && b < 220) {
b++;
} else if (b == 220 && r == 0 && g > 0) {
g--;
} else if (b == 220 && g == 0 && r < 220) {
r++;
} else if (r == 220 && g == 0 && b > 0) {
b--;
}
if (!flag) {
r2 += 5;
g2 += 5;
b2 += 5;
if (r2 == 250) {
flag = true;
}
} else {
r2 -= 5;
g2 -= 5;
b2 -= 5;
if (r2 == 10) {
flag = false;
}
}
jLabelAppTitle.setForeground(new Color(r, g, b));
jLabelHint.setForeground(new Color(r2, g2, b2));
} else {
((Timer) e.getSource()).stop();
}
});
timer.setCoalesce(true);
timer.setRepeats(true);
timer.start();
}
private void centerLocation() throws HeadlessException {
final Toolkit toolkit = Toolkit.getDefaultToolkit();
final Dimension screenSize = toolkit.getScreenSize();
final int x = (screenSize.width - this.getWidth()) / 2;
final int y = (screenSize.height - this.getHeight()) / 2;
this.setLocation(x, y);
}
@SuppressWarnings("unchecked")
private void initComponents() {
JPanel jPanelMain = new JPanel() {
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g.create();
RenderingHints qualityHints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
qualityHints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2.setRenderingHints(qualityHints);
g2.setPaint(Color.WHITE);
g2.fillRoundRect(0, 0, getWidth(), getHeight(), 25, 25);
g2.dispose();
}
};
jPanelExit = new JPanel();
JLabel jLabelExit = new JLabel();
JLabel jLabelWelcome = new JLabel();
jLabelAppTitle = new JLabel();
jLabelHint = new JLabel();
JButton jButtonGo = new JButton();
setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
setTitle("welcome to My App!");
setUndecorated(true);
setBackground(new Color(0, 0, 0, 0));
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
close();
}
});
addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
public void mouseDragged(MouseEvent evt) {
thisMouseDragged(evt);
}
});
addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(MouseEvent evt) {
thisMousePressed(evt);
}
});
jPanelMain.setBackground(Color.WHITE);
jPanelExit.setBackground(new Color(160, 0, 20));
jLabelExit.setFont(new Font("Tahoma", Font.BOLD, 13));
jLabelExit.setForeground(new Color(255, 255, 255));
jLabelExit.setHorizontalAlignment(SwingConstants.CENTER);
jLabelExit.setText("X");
jLabelExit.setCursor(new Cursor(Cursor.HAND_CURSOR));
jLabelExit.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(MouseEvent evt) {
jLabelExitMouseClicked();
}
public void mouseEntered(MouseEvent evt) {
jLabelExitMouseEntered();
}
public void mouseExited(MouseEvent evt) {
jLabelExitMouseExited();
}
});
GroupLayout jPanelExitLayout = new GroupLayout(jPanelExit);
jPanelExit.setLayout(jPanelExitLayout);
jPanelExitLayout.setHorizontalGroup(
jPanelExitLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(GroupLayout.Alignment.TRAILING, jPanelExitLayout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabelExit, GroupLayout.PREFERRED_SIZE, 45, GroupLayout.PREFERRED_SIZE))
);
jPanelExitLayout.setVerticalGroup(
jPanelExitLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(GroupLayout.Alignment.TRAILING, jPanelExitLayout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabelExit, GroupLayout.PREFERRED_SIZE, 22, GroupLayout.PREFERRED_SIZE))
);
jLabelWelcome.setFont(new Font("Tahoma", 0, 25));
jLabelWelcome.setForeground(new Color(0, 0, 100));
jLabelWelcome.setHorizontalAlignment(SwingConstants.CENTER);
jLabelWelcome.setText("Welcome");
jLabelAppTitle.setFont(new Font("MV Boli", 0, 29));
jLabelAppTitle.setHorizontalAlignment(SwingConstants.CENTER);
jLabelAppTitle.setText("My Swing App");
jButtonGo.setBackground(new Color(100, 20, 80));
jButtonGo.setFont(new Font("Tahoma", 0, 15));
jButtonGo.setForeground(new Color(255, 255, 255));
jButtonGo.setText("GO");
jButtonGo.addActionListener(evt -> jButtonGoActionPerformed());
jLabelHint.setFont(new Font("Tahoma", 0, 11));
jLabelHint.setHorizontalAlignment(SwingConstants.CENTER);
jLabelHint.setText("press GO button");
javax.swing.GroupLayout jPanelMainLayout = new javax.swing.GroupLayout(jPanelMain);
jPanelMain.setLayout(jPanelMainLayout);
jPanelMainLayout.setHorizontalGroup(
jPanelMainLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanelMainLayout.createSequentialGroup()
.addContainerGap(48, Short.MAX_VALUE)
.addGroup(jPanelMainLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanelMainLayout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jPanelExit, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(15, 15, 15))
.addGroup(jPanelMainLayout.createSequentialGroup()
.addGroup(jPanelMainLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(jLabelWelcome, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabelAppTitle, javax.swing.GroupLayout.DEFAULT_SIZE, 220, Short.MAX_VALUE)
.addComponent(jLabelHint, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButtonGo, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap(48, Short.MAX_VALUE))))
);
jPanelMainLayout.setVerticalGroup(
jPanelMainLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanelMainLayout.createSequentialGroup()
.addComponent(jPanelExit, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(64, 64, 64)
.addComponent(jLabelWelcome, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(98, 98, 98)
.addComponent(jLabelAppTitle)
.addGap(86, 86, 86)
.addComponent(jLabelHint)
.addGap(24, 24, 24)
.addComponent(jButtonGo, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(86, 86, 86))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(0, 0, 0)
.addComponent(jPanelMain, javax.swing.GroupLayout.DEFAULT_SIZE, 316, Short.MAX_VALUE)
.addGap(0, 0, 0))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(0, 0, 0)
.addComponent(jPanelMain, javax.swing.GroupLayout.DEFAULT_SIZE, 473, Short.MAX_VALUE)
.addGap(0, 0, 0))
);
pack();
}
private void thisMousePressed(MouseEvent evt) {
initialClick = evt.getPoint();
}
private void thisMouseDragged(MouseEvent evt) {
int thisX = this.getLocation().x;
int thisY = this.getLocation().y;
int xMoved = (thisX + evt.getX()) - (thisX + initialClick.x);
int yMoved = (thisY + evt.getY()) - (thisY + initialClick.y);
int x = thisX + xMoved;
int y = thisY + yMoved;
this.setLocation(x, y);
}
private void jLabelExitMouseClicked() {
close();
}
private void close() {
end = true;
FadeTransitions.fadeOut(this, FadeTransitions.FAST_FADE, FadeTransitions.EXIT_ON_CLOSE);
}
private void jLabelExitMouseEntered() {
jPanelExit.setBackground(new Color(200, 0, 20));
}
private void jLabelExitMouseExited() {
jPanelExit.setBackground(new Color(160, 0, 20));
}
private void jButtonGoActionPerformed() {
end = true;
FadeTransitions.run(this, new ServerManager(this), FadeTransitions.NORMAL_FADE, FadeTransitions.DISPOSE_ON_CLOSE);
}
}
感谢。
2 个答案:
答案 0 :(得分：7)
很抱歉，不是答案，但希望至少朝着可接受的答案迈出一步：从我到目前为止的分析来看，可能是这只是一个深处（深夜！）内部的一个错误渲染管道。
以下MVCE显示两个（未修饰的）框架，每个框架包含一个按钮。它们是相同的，除了用于帧的背景。对于一帧，颜色是透明的，而对于另一帧，它是不透明的。
import java.awt.Color;
import java.awt.Font;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class TextRenderBug extends JFrame {
public static void main(String[] args)
{
setLookAndFeel();
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
createAndShowGUI(new Color(0,0,0 ), 400);
createAndShowGUI(new Color(0,0,0,0), 600);
}
});
}
private static void setLookAndFeel()
{
try
{
for (UIManager.LookAndFeelInfo info :
UIManager.getInstalledLookAndFeels())
{
if ("Nimbus".equals(info.getName()))
{
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
private static void createAndShowGUI(Color background, int x)
{
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setUndecorated(true);
f.setBackground(background);
JButton b = new JButton("Text");
b.setFont(new Font("Tahoma", 0, 15));
f.getContentPane().add(b);
f.setBounds(x, 400, 200, 50);
f.setVisible(true);
}
}
它清楚地表明文本以不同的方式呈现，完全取决于背景是否透明 - 当然，情况并非如此。
（顺便说一句，这不是Nimbus特有的：它也适用于其他LookAndFeel。只需删除设置LaF的行。）
到目前为止我发现了什么：
- 行为以某种方式由
drawString类 的 - 它不会出现在所有组件中。它可以在
JButton和JLabel上观察到，但不能在正常JComponent上观察到
- 更新：它也不依赖于字体（虽然使用其他字体，但效果并不那么明显）。正确渲染时，字体看起来更加粗体，但当然，它不仅仅是与
Font.BOLD相同的字体。 - 绘画过程相当复杂。
sun.swing.SwingUtilities2方法引起
（好吧，有些人可能已经知道后者）。
这是一个显示最后观察结果的例子，也许它可以作为进一步研究其他观察的起点：
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.lang.reflect.Method;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class TextRenderBugTest
{
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
createAndShowGUI(new Color(0,0,0 ), 400);
createAndShowGUI(new Color(0,0,0,0), 600);
}
});
}
private static void createAndShowGUI(Color background, int x)
{
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setUndecorated(true);
f.setBackground(background);
JButton b = new JButton("Text");
b.setFont(new Font("Tahoma", 0, 15));
JComponent c = new ExampleComponent();
c.setFont(new Font("Tahoma", 0, 15));
f.getContentPane().setLayout(new GridLayout(0,1));
f.getContentPane().add(b);
f.getContentPane().add(c);
f.setBounds(x, 400, 200, 100);
f.setVisible(true);
}
static class ExampleComponent
//extends JComponent
extends JButton
{
@Override
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.setColor(getBackground());
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(getForeground());
g.drawString("Text", 10, 20);
drawStringWithSwingUtilities(g, 60, 20);
}
private void drawStringWithSwingUtilities(Graphics g, int x, int y)
{
try
{
Class<?> c = Class.forName("sun.swing.SwingUtilities2");
Method m = c.getMethod("drawString", JComponent.class,
Graphics.class, String.class, int.class, int.class);
m.invoke(null, this, g, "Text", x, y);
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
}
我已经尝试进一步分析了这一点，并使用了RenderingHints KEY_TEXT_ANTIALIASING和KEY_TEXT_LCD_CONTRAST以及其他设置，这些设置在绘制管道中更改时朝向像素最终放在屏幕上，但直到现在还没有进一步的见解。
（如果您愿意，可以将此信息添加到原始问题中，然后我将删除此（不是）答案）
答案 1 :(得分：4)
你唯一的机会就是与地区合作。您将需要硬编码并使用减法，但最终它看起来会很好。您可以在mylyn的通知类中查看它是如何完成的：http://grepcode.com/file/repository.grepcode.com/java/eclipse.org/3.6/org.eclipse.mylyn.commons/ui/3.4.0/org/eclipse/mylyn/internal/provisional/commons/ui/AbstractNotificationPopup.java
希望它有所帮助，祝你好运！
编辑：记住这个可能有用的小教程：http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/SWTShellcreateanonrectangularwindow.htm
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