Java中的多行工具提示？
[英]Multi-line tooltips in Java?
问题描述
I'm trying to display tooltips in Java which may or may not be paragraph-length. 
我正在尝试在Java中显示工具提示，这可能是段落长度，也可能不是。 How can I word-wrap long tooltips? 如何自动换行长工具提示？
10 个解决方案
解决方案1
143 已采纳 2009-05-15 13:35:01
If you wrap the tooltip in <html> and </html> tags, you can break lines with <br> tags. 如果将工具提示包装在<html>和</html>标记中，则可以使用<br>标记中断行。 See http://www.jguru.com/faq/view.jsp?EID=10653 for examples and discussion. 有关示例和讨论，请参见http://www.jguru.com/faq/view.jsp?EID=10653 。
Or you can use the JMultiLineToolTip class that can be found many places on the net, including https://github.com/ls-cwi/yoshiko-app/blob/master/src/main/java/com/yoshiko/internal/view/JMultiLineToolTip.java 或者您可以使用可以在网上找到许多地方的JMultiLineToolTip类，包括https://github.com/ls-cwi/yoshiko-app/blob/master/src/main/java/com/yoshiko/internal/视图/ JMultiLineToolTip.java
解决方案2
24 2009-05-15 13:38:25
Tooltip text which starts with " <html> " will be treated as HTML. 以“ <html> ”开头的工具提示文本将被视为HTML。 Of course that might be very wide HTML. 当然，这可能是非常宽的HTML。
You can override JComponent.createTooltip to replace the tooltip with your own component which can display whatevee you like. 您可以覆盖JComponent.createTooltip以将工具提示替换为您自己的组件，该组件可以显示您喜欢的whatevee。
解决方案3
19 2013-06-09 10:19:05
I know this one is quite old but i found a quite simple solution using HTML code! 我知道这个很老了，但我找到了一个使用HTML代码的简单解决方案！
Just use a HTML Paragraph with a fixed width: 只需使用固定宽度的HTML段落：
setToolTipText("<html><p width=\"500\">" +value+"</p></html>");
解决方案4
5 2009-05-15 13:35:09
Use HTML tooltips and manually break your lines (a simple word tokenizer with a fixed line length should do it). 使用HTML工具提示并手动断行（具有固定行长度的简单单词标记器应该这样做）。 Just make sure your tooltop text starts with "<HTML>". 只需确保您的tooltop文本以“<HTML>”开头即可。 Break lines with "<BR/>" or "<P>". 用“<BR/>”或“<P>”分隔行。 I realize it's not the most clean solution and Java's HTML support is horrible, but it should get things done. 我意识到这不是最干净的解决方案，Java的HTML支持是可怕的，但它应该完成任务。
解决方案5
4 2012-11-20 14:14:42
Example: 例：
jTextField1.setToolTipText("<html>"
+ "Line One"
+"<br>"
+ "Line 2"
+ "</html>");
解决方案6
2 2012-11-21 23:23:33
This could be improved somewhat, but my approach was a helper function called before setting tooltip that split the tooltip text at provided length, but adjusted to break words on space where possible. 这可以稍微改进，但我的方法是在设置工具提示之前调用的辅助函数，该工具提示将工具提示文本拆分为提供的长度，但调整为在可能的情况下打破空间上的单词。
import java.util.ArrayList;
import java.util.List;
/**
*
*/
public class MultiLineTooltips
{
private static int DIALOG_TOOLTIP_MAX_SIZE = 75;
private static final int SPACE_BUFFER = 10;
public static String splitToolTip(String tip)
{
return splitToolTip(tip,DIALOG_TOOLTIP_MAX_SIZE);
}
public static String splitToolTip(String tip,int length)
{
if(tip.length()<=length + SPACE_BUFFER )
{
return tip;
}
List<String> parts = new ArrayList<>();
int maxLength = 0;
String overLong = tip.substring(0, length + SPACE_BUFFER);
int lastSpace = overLong.lastIndexOf(' ');
if(lastSpace >= length)
{
parts.add(tip.substring(0,lastSpace));
maxLength = lastSpace;
}
else
{
parts.add(tip.substring(0,length));
maxLength = length;
}
while(maxLength < tip.length())
{
if(maxLength + length < tip.length())
{
parts.add(tip.substring(maxLength, maxLength + length));
maxLength+=maxLength+length;
}
else
{
parts.add(tip.substring(maxLength));
break;
}
}
StringBuilder sb = new StringBuilder("<html>");
for(int i=0;i<parts.size() - 1;i++)
{
sb.append(parts.get(i)+"<br>");
}
sb.append(parts.get(parts.size() - 1));
sb.append(("</html>"));
return sb.toString();
}
}
Use like 用得像
jComponent.setToolTipText(MultiLineTooltips.splitToolTip(TOOLTIP));
解决方案7
2 2009-05-15 14:43:26
您可以继承JToolTip（它是一个Component），并覆盖组件上的createToolTip（）。
解决方案8
1 2013-04-06 00:33:14
Here is a version which I have used before, it works well if you are loading your tool tips from ResourceBundles: 这是我以前使用过的一个版本，如果你从ResourceBundles加载你的工具提示它会很好用：
import javax.swing.JComponent;
import javax.swing.JToolTip;
import javax.swing.LookAndFeel;
import javax.swing.UIManager;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.ToolTipUI;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.util.regex.Pattern;
/**
* A tooltip that wraps multi-line text.
*/
public final class MultiLineToolTipUI extends ToolTipUI {
private static final int INSET = 2;
private static final Pattern LINE_SPLITTER = Pattern.compile("$", Pattern.MULTILINE);
private static final MultiLineToolTipUI SHARED_INSTANCE = new MultiLineToolTipUI();
/**
* Install the multi-line tooltip into the UI manager.
*/
public static void installUI() {
String toolTipUI = MultiLineToolTipUI.class.getName();
UIManager.put("ToolTipUI", toolTipUI);
UIManager.put(toolTipUI, MultiLineToolTipUI.class);
}
@SuppressWarnings("UnusedDeclaration")
public static ComponentUI createUI(JComponent c) {
return SHARED_INSTANCE;
}
private MultiLineToolTipUI() {}
@Override
public Dimension getMaximumSize(JComponent c) {
return getPreferredSize(c);
}
@Override
public Dimension getMinimumSize(JComponent c) {
return getPreferredSize(c);
}
@Override
public Dimension getPreferredSize(JComponent c) {
String[] lines = LINE_SPLITTER.split(((JToolTip) c).getTipText());
if (lines.length == 0) {
return new Dimension(2 * INSET, 2 * INSET);
}
FontMetrics metrics = c.getFontMetrics(c.getFont());
Graphics g = c.getGraphics();
int w = 0;
for (String line : lines) {
w = Math.max(w, (int) metrics.getStringBounds(line, g).getWidth());
}
int h = lines.length * metrics.getHeight();
return new Dimension(w + 2 * INSET, h + 2 * INSET);
}
@Override
public void installUI(JComponent c) {
LookAndFeel.installColorsAndFont(c, "ToolTip.background", "ToolTip.foreground", "ToolTip.font");
LookAndFeel.installBorder(c, "ToolTip.border");
}
@Override
public void paint(Graphics g, JComponent c) {
int w = c.getWidth(), h = c.getHeight();
g.setColor(c.getBackground());
g.fillRect(0, 0, w, h);
g.setColor(c.getForeground());
g.drawRect(0, 0, w, h);
String[] lines = LINE_SPLITTER.split(((JToolTip) c).getTipText());
if (lines.length != 0) {
FontMetrics metrics = c.getFontMetrics(c.getFont());
int height = metrics.getHeight();
int y = INSET + metrics.getAscent();
for (String line : lines) {
g.drawString(line, INSET, y);
y += height;
}
}
}
@Override
public void uninstallUI(JComponent c) {
LookAndFeel.uninstallBorder(c);
}
}
And you would use it by calling this method, before your UI is created: 在创建UI之前，您可以通过调用此方法来使用它：
MultiLineToolTipUI.installUI();
Then in your properties files just insert newlines to wrap your tool tips as desired. 然后在属性文件中插入换行符以根据需要包装工具提示。
解决方案9
1 2018-03-29 06:34:44
I created a utility class that automatically formats strings to a specific length with <br> tags. 我创建了一个实用程序类，它使用<br>标签自动将字符串格式化为特定长度。 It is based on the MultiLineToolTips class posted by Paul Taylor, but his has a bug in it that skips portions of the string and does not actually limit the string to a specific length. 它基于Paul Taylor发布的MultiLineToolTips类，但是他有一个错误，跳过部分字符串并且实际上并没有将字符串限制为特定长度。
To use my class, simply invoke the splitToolTip method by writing MultiLineToolTips.splitToolTip(yourString); 要使用我的类，只需通过编写MultiLineToolTips.splitToolTip(yourString);调用splitToolTip方法MultiLineToolTips.splitToolTip(yourString); or MultiLineToolTips.splitToolTip(yourString, maxLength); 或MultiLineToolTips.splitToolTip(yourString, maxLength); if you want to split it to a specific maximum length. 如果要将其拆分为特定的最大长度。 This will create nicely formatted tool tip strings. 这将创建格式良好的工具提示字符串。
import java.util.ArrayList;
import java.util.List;
/** A helper class to split strings into a certain length,
* formatted with html {@literal<br>} tags for multi-line tool tips.
* Based on the MultiLineToolTips class posted by
* <a href="https://stackoverflow.com/users/1480018/paul-taylor">Paul Taylor</a>
* on <a href="https://stackoverflow.com/a/13503677/9567822">Stack Overflow</a>
* @author <a href="https://stackoverflow.com/users/9567822/andrew-lemaitre?tab=profile">Andrew LeMaitre</a>
*/
public final class MultiLineToolTips {
/** Private constructor for utility class. */
private MultiLineToolTips() {
}
/** Default max length of the tool tip when split with {@link #splitToolTip(String)}. */
private static final int DIALOG_TOOLTIP_MAX_SIZE = 75;
/** A function that splits a string into sections of {@value #DIALOG_TOOLTIP_MAX_SIZE} characters or less.
* If you want the lines to be shorter or longer call {@link #splitToolTip(String, int)}.
* @param toolTip The tool tip string to be split
* @return the tool tip string with HTML formatting to break it into sections of the correct length
*/
public static String splitToolTip(final String toolTip) {
return splitToolTip(toolTip, DIALOG_TOOLTIP_MAX_SIZE);
}
/** An overloaded function that splits a tool tip string into sections of a specified length.
* @param toolTip The tool tip string to be split
* @param desiredLength The maximum length of the tool tip per line
* @return The tool tip string with HTML formatting to break it into sections of the correct length
*/
public static String splitToolTip(final String toolTip, final int desiredLength) {
if (toolTip.length() <= desiredLength) {
return toolTip;
}
List<String> parts = new ArrayList<>();
int stringPosition = 0;
while (stringPosition < toolTip.length()) {
if (stringPosition + desiredLength < toolTip.length()) {
String tipSubstring = toolTip.substring(stringPosition, stringPosition + desiredLength);
int lastSpace = tipSubstring.lastIndexOf(' ');
if (lastSpace == -1 || lastSpace == 0) {
parts.add(toolTip.substring(stringPosition, stringPosition + desiredLength));
stringPosition += desiredLength;
} else {
parts.add(toolTip.substring(stringPosition, stringPosition + lastSpace));
stringPosition += lastSpace;
}
} else {
parts.add(toolTip.substring(stringPosition));
break;
}
}
StringBuilder sb = new StringBuilder("<html>");
for (int i = 0; i < parts.size() - 1; i++) {
sb.append(parts.get(i) + "<br>");
}
sb.append(parts.get(parts.size() - 1));
sb.append(("</html>"));
return sb.toString();
}
}
解决方案10
0 2014-10-17 01:28:48
If you just add <html> to your tooltip text, it will appear to work until you have /*...*/ or HTML in your text. 如果您只是将<html>添加到工具提示文本中，它将在您的文本中包含/*...*/或HTML之前显示。 Use <html><pre> or escape your text. 使用<html><pre>或转义您的文字。 I also had to use <font size=3> to get it looking somewhat decent. 我还必须使用<font size=3>来使它看起来有点像样。
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