在Rectangle中创建字符串 [英] Creating a string inside a Rectangle
本文介绍了在Rectangle中创建字符串的处理方法，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
你好，我想在一个矩形里面做一个字符串在java中做自定义菜单我使用一个画布，并执行以下方法，但我似乎无法得到它！
public void render（Graphics g）{
Graphics2D g2d =（Graphics2D）g;
g2d.setColor（Color.WHITE）;
Font font = new Font（Verdana，Font.PLAIN，20）;
g2d.setFont（font）;
g2d.setRenderingHint（RenderingHints.KEY_ANTIALIASING，
RenderingHints.VALUE_ANTIALIAS_ON）;
FontMetrics fm = root.getFontMetrics（font）;
g2d.drawString（option，（int）getX（） - fm.stringWidth（option）/ 2，（int）getY（）+ fm.getHeight（））;
g2d.drawRect（（int）getX（） - fm.stringWidth（option）/ 2 - 20，（int）getY（） - fm.getHeight（） - 10，（int）getX stringWidth（option）/ 2 + 40，（int）getY（） - fm.getHeight（）+ 10）;
}
解决方案
你正在使用组件x / y位置，其中 Graphics 上下文已经翻译，因此 0x0 是顶/
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class DrawText {
public static void main（String [] args）{
new DrawText（）;
}
public DrawText（）{
EventQueue.invokeLater（new Runnable（）{
@Override
public void run（）{
try {
UIManager.setLookAndFeel（UIManager.getSystemLookAndFeelClassName（））;
} catch（ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex）{
ex.printStackTrace（）;
}
JFrame frame = new JFrame（Testing）;
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
frame.add（new TestPane（））;
frame.pack（）;
frame.setLocationRelativeTo（null）;
frame.setVisible（true）;
}
}）;
}
public class TestPane extends JPanel {
public TestPane（）{
setBackground（Color.BLACK）;
}
@Override
public Dimension getPreferredSize（）{
return new Dimension（200，200）;
}
@Override
protected void paintComponent（Graphics g）{
super.paintComponent（g）;
Graphics2D g2d =（Graphics2D）g.create（）;
g2d.setColor（Color.RED）;
g2d.drawLine（0，getHeight（）/ 2，getWidth（），getHeight（）/ 2）;
g2d.drawLine（getWidth（）/ 2，0，getWidth（）/ 2，getHeight（））;
render（g）;
g2d.dispose（）;
}
public void render（Graphics g）{
Graphics2D g2d =（Graphics2D）g;
g2d.setColor（Color.WHITE）;
Font font = new Font（Verdana，Font.PLAIN，20）;
g2d.setFont（font）;
g2d.setRenderingHint（RenderingHints.KEY_ANTIALIASING，
RenderingHints.VALUE_ANTIALIAS_ON）;
FontMetrics fm = g2d.getFontMetrics（）;
String option =This is a test;
int x =（getWidth（） - fm.stringWidth（option））/ 2;
int y =（（getHeight（） - fm.getHeight（））/ 2）;
g2d.drawString（option，x，y + fm.getAscent（））;
g2d.drawRect（
（int）x - 20，
（int）y - 10，
（int）fm.stringWidth（option）+ 40，
（int）fm.getHeight（）+ 20）;
}
}
}
...
更新... / p>
如果每个菜单项都打印在单个组件中，则上面提供的概念应该工作。如果您在单个组件中打印多个项目，则可以使用...。
public void render（Graphics g）{
Graphics2D g2d =（Graphics2D）g;
g2d.setColor（Color.WHITE）;
Font font = new Font（Verdana，Font.PLAIN，20）;
g2d.setFont（font）;
int x = 0;
int y = 0;
g2d.setRenderingHint（RenderingHints.KEY_ANTIALIASING，
RenderingHints.VALUE_ANTIALIAS_ON）;
FontMetrics fm = g2d.getFontMetrics（）;
String option =This is a test;
while（x< getWidth（））{
while（y
int width = fm.stringWidth （选项）;
int height = fm.getHeight（）;
g2d.drawString（option，x + 20，y + fm.getAscent（）+ 10）;
width + = 40;
height + = 20;
g2d.drawRect（
（int）x，
（int）y，
（int）width，
x + = width;
y + = height;
}
}
}
Hello i'm trying to do a string inside a rectangle to make custom menus in java I'm using a canvas and doing the following method, but I can't seem to get it right!
public void render(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.WHITE);
Font font = new Font("Verdana", Font.PLAIN, 20);
g2d.setFont(font);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
FontMetrics fm = root.getFontMetrics(font);
g2d.drawString(option, (int)getX() - fm.stringWidth(option)/2, (int) getY() + fm.getHeight());
g2d.drawRect((int)getX() - fm.stringWidth(option)/2 - 20, (int) getY() - fm.getHeight() - 10, (int)getX() - fm.stringWidth(option)/2 + 40 , (int) getY() - fm.getHeight() + 10);
}
解决方案
The basic problem you have is that you are using the components x/y position where the Graphics context is already translated so that 0x0 is the top/left corner of the component.
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class DrawText {
public static void main(String[] args) {
new DrawText();
}
public DrawText() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setBackground(Color.BLACK);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
g2d.setColor(Color.RED);
g2d.drawLine(0, getHeight() / 2, getWidth(), getHeight() / 2);
g2d.drawLine(getWidth() / 2, 0, getWidth() / 2, getHeight());
render(g);
g2d.dispose();
}
public void render(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.WHITE);
Font font = new Font("Verdana", Font.PLAIN, 20);
g2d.setFont(font);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
FontMetrics fm = g2d.getFontMetrics();
String option = "This is a test";
int x = (getWidth() - fm.stringWidth(option)) / 2;
int y = ((getHeight() - fm.getHeight()) / 2);
g2d.drawString(option, x, y + fm.getAscent());
g2d.drawRect(
(int)x - 20,
(int)y - 10,
(int)fm.stringWidth(option) + 40,
(int)fm.getHeight() + 20);
}
}
}
For example...
Updated...
If, each menu item is printed within a single component, then the concept provided above should work. If you are printing multiple items within a single component, you could use something like...
public void render(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.WHITE);
Font font = new Font("Verdana", Font.PLAIN, 20);
g2d.setFont(font);
int x = 0;
int y = 0;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
FontMetrics fm = g2d.getFontMetrics();
String option = "This is a test";
while (x < getWidth()) {
while (y < getHeight()) {
int width = fm.stringWidth(option);
int height= fm.getHeight();
g2d.drawString(option, x + 20, y + fm.getAscent() + 10);
width += 40;
height += 20;
g2d.drawRect(
(int) x,
(int) y,
(int) width,
(int) height);
x += width;
y += height;
}
}
}
这篇关于在Rectangle中创建字符串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IT屋！
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