The labels of most components in netbeans are displayed in a single line. You just need to use settooltiptext (string tip) to set the labels for buttons and other prompts. However, if you want to set a multi-row label prompt, there will be a multi-row label prompt on netbeans, as shown in:
Some people on the Internet say that settooltiptext ("<HTML> AAAA/BR bbbbb ToolTip
The displayed components can be rewritten.JComponent
OfcreateToolTip
Method, and use a subclass of this class.
Method: First, define a multilinetooltip that inherits the jtooltip. Rewrite the createconltip () method for the component that needs to implement multiline prompts. When settooltiptext (string tip) is used) you can (use '/N' to separate multiple rows). Check the effect first:
Implementation of multilinw.ltipHere we need to make the L & F of jtooltip, put the lines to be displayed in the string array, calculate the width and height of the display panel, traverse the array and draw the content to the Panel:
Package COM. monitor1394.netbeans. component; <br/> Import Java. AWT. dimension; <br/> Import Java. AWT. fontmetrics; <br/> Import Java. AWT. graphics; <br/> Import Java. AWT. toolkit; <br/> Import Java. io. bufferedreader; <br/> Import Java. io. ioexception; <br/> Import Java. io. stringreader; <br/> Import Java. util. enumeration; <br/> Import Java. util. vector; <br/> Import javax. swing. jcomponent; <br/> Import javax. swing. JT Ooltip; <br/> Import javax. swing. swingutilities; <br/> Import javax. swing. plaf. metal. metaltooltipui; <br/>/** <br/> * multi-row tooltip <br/> * @ author Monitor <br/> * created on, 22:12:06 <br/> */<br/> public class multilinw.ltip extends jtooltip {<br/> Public multilinw.ltip () {<br/> setui (New multilinw.ltipui ()); <br/>}< br/> private class multilinw.ltipui extends metaltoo Ltipui {<br/> private string [] STRs; <br/> private int maxwidth = 0; <br/> @ override <br/> Public void paint (Graphics G, jcomponent c) {<br/> fontmetrics metrics = C. getfontmetrics (G. getfont (); <br/> dimension size = C. getsize (); <br/> G. setcolor (C. getbackground (); <br/> G. fillrect (0, 0, size. width, size. height); <br/> G. setcolor (C. getforeground (); <br/> If (STRs! = NULL) {<br/> for (INT I = 0; I <STRs. length; I ++) {<br/> G. drawstring (STRs [I], 3, (metrics. getheight () * (I + 1 )); <br/>}< br/> @ override <br/> public dimension getpreferredsize (jcomponent C) {<br/> fontmetrics metrics = toolkit. getdefatooltoolkit (). getfontmetrics (C. getfont (); <br/> string tiptext = (jtooltip) c ). gettiptext (); <br/> If (tiptext = NULL) {<br/> tiptext =" "; <Br/>}< br/> bufferedreader BR = new bufferedreader (New stringreader (tiptext); <br/> string line; <br/> int maxwidth = 0; <br/> vector v = new vector (); <br/> try {<br/> while (line = BR. readline ())! = NULL) {<br/> int width = swingutilities. computestringwidth (metrics, line); <br/> maxwidth = (maxwidth <width )? Width: maxwidth; <br/> v. addelement (line); <br/>}< br/>} catch (ioexception ex) {<br/> ex. printstacktrace (); <br/>}< br/> int lines = v. size (); <br/> If (lines <1) {<br/> STRs = NULL; <br/> lines = 1; <br/>} else {<br/> STRs = new string [Lines]; <br/> int I = 0; <br/> for (enumeration E = v. elements (); E. hasmoreelements (); I ++) {<br/> STRs [I] = (string) E. nextelement (); <br/>}< br/> int Height = metrics. getheight () * lines; <br/> This. maxwidth = maxwidth; <br/> return new dimension (maxwidth + 6, height + 4); <br/>}< br/>
The tabbutton class needs to override the createconltip () class:
@ Override <br/> Public jtooltip createconltip () {<br/> multilineconltip tip = new multilineconltip (); <br/> return tip; <br/>}
Set the content to be displayed:
Settooltiptext ("hold down SHIFT and click to close all documents/n hold down ALT and click to close other documents ");
Close the job.
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
