Groovy SwingBuilder : controlling the style of the tabs titles in JTabbedPane

问题

I can't find a way (is there any ?) to format the style of tabs titles in a JTabbedPane.

I can change the background color of the tab panes (see below), but can't find a way to style the titles of the tabs; I would like to have them bold or red or be able to define the tabs width, for instance, like I could format the style of the labels in the first panel.

Here's the code, mostly inspired by tim_yates (Groovy SwingBuilder : using a scrollpanel to show a list of panels) :

import groovy.swing.SwingBuilder
import javax.swing.WindowConstants as WC
import javax.swing.JOptionPane
import javax.swing.JTabbedPane
import javax.swing.JScrollPane
import javax.swing.BoxLayout as BXL
import java.awt.Font

Font font = new Font("Serif", Font.BOLD, 13) 
int numPanels = 20

swing = new SwingBuilder()
frame = swing.frame(title:'test', pack:true,   visible:true, defaultCloseOperation:WC.DISPOSE_ON_CLOSE) {
    tabbedPane(id: 'tabs', tabLayoutPolicy:JTabbedPane.SCROLL_TAB_LAYOUT) {
        panel(name: 'Tab 1', background:java.awt.Color.WHITE ) {
            boxLayout(axis: BXL.Y_AXIS) 
            panel(alignmentX: 0f, background:java.awt.Color.WHITE){
                label ( 'Label 1', preferredSize: [104, 24]).setFont(font) 
                label ( 'Label 2', preferredSize: [104, 24]).setFont(font) 
                label ( 'Label 3', preferredSize: [104, 24]).setFont(font) 
            }   
            scrollPane( verticalScrollBarPolicy:JScrollPane.VERTICAL_SCROLLBAR_ALWAYS) {
                vbox (){
                    (1..numPanels).each { num ->
                        def panelID = "panel$num"
                        def pane = panel( alignmentX:0f, id:panelID, background:java.awt.Color.GREEN ) {
                            label('description') 
                            textField( id: "description$num", text:panelID, columns: 70 )
                            button( id: "buttonpanel$num", text:panelID, actionPerformed:{
                            swing."$panelID".background = java.awt.Color.RED
                            } )
                        }
                    }
                }
            }
        }       
        panel(name: 'Tab 2', background:java.awt.Color.WHITE) {
            textField(text: 'Some text', columns: 15)
            scrollPane() {
                textArea(text: 'Some text', columns: 15, rows: 4)
            }
        }       
    }
    boxLayout(axis: BXL.Y_AXIS)
    panel(id:'secondPanel', background:java.awt.Color.WHITE){                       
        button('Quit', actionPerformed:{
        dispose()
        })
    }   
}
frame.size = [ frame.width, 600 ]

I found these links which look very difficult (to me) to implement in Groovy :

JTabbedPane: icon on left side of tabs
How to make JTabbedPane autoresize to fit page dimensions?
Controlling Color in Java Tabbed Pane

Also the Java docs do not explain how to do that, and I didn't find any example using styled tabs.

Thanks for your help.

Regards,

Michel.

PS : Ant's offered a link

Groovy SwingBuilder : changing size and/or font of tabs (in jTabbedpane)

to an interesting article, but not directly helpful for my question (initially too vague).

回答1:

I believe you need to call jtabbedpane.setTabComponentAt (the javadoc for which can be found here)

This requires you be using Java 6 (for Java 5, you are going to have to look into writing a custom TabbedPaneUI class, and overriding this -- or use a custom JTabbedPane class from some other source that allows this)

Here's an example of it in action:

import groovy.swing.SwingBuilder
import javax.swing.WindowConstants as WC
import javax.swing.JOptionPane
import javax.swing.JTabbedPane
import javax.swing.JScrollPane
import javax.swing.BoxLayout as BXL
import java.awt.Font

Font font = new Font("Serif", Font.BOLD, 13) 
int numPanels = 20

swing = new SwingBuilder()

frame = swing.frame(title:'test', pack:true,   visible:true, defaultCloseOperation:WC.DISPOSE_ON_CLOSE) {
    vbox {
        tabbedPane(id: 'tabs', tabLayoutPolicy:JTabbedPane.SCROLL_TAB_LAYOUT) {
            panel( name:'Tab 1', background:java.awt.Color.WHITE ) {
                vbox {
                    panel( background:java.awt.Color.WHITE ){
                        label ( 'Label 1', preferredSize: [104, 24]).setFont(font) 
                        label ( 'Label 2', preferredSize: [104, 24]).setFont(font) 
                        label ( 'Label 3', preferredSize: [104, 24]).setFont(font) 
                    }   
                    scrollPane( verticalScrollBarPolicy:JScrollPane.VERTICAL_SCROLLBAR_ALWAYS) {
                        vbox {
                            (1..numPanels).each { num ->
                                def panelID = "panel$num"
                                def pane = panel( alignmentX:0f, id:panelID, background:java.awt.Color.GREEN ) {
                                    label('description') 
                                    textField( id: "description$num", text:panelID, columns: 70 )
                                    button( id: "buttonpanel$num", text:panelID, actionPerformed:{
                                        swing."$panelID".background = java.awt.Color.RED
                                    } )
                                }
                            }
                        }
                    }
                }
            }       
            panel(name: 'Tab 2', background:java.awt.Color.WHITE) {
                textField(text: 'Some text', columns: 15)
                scrollPane() {
                    textArea(text: 'Some text', columns: 15, rows: 4)
                }
            }       
        }
        panel(id:'secondPanel', background:java.awt.Color.WHITE){                       
            button('Quit', actionPerformed:{
                dispose()
            })
        }   
    }
}

// Define a list of labels for our tabs
def tabComponents = [
  swing.label( text:'Tab 1', font:font.deriveFont( Font.ITALIC ) ),
  swing.label( text:'Tab 2', font:font.deriveFont( 20.0f ) )
]
// Set the tab componets to our labels
tabComponents.eachWithIndex { lbl, idx ->
  swing.tabs.setTabComponentAt idx, lbl
}

frame.size = [ frame.width, 600 ]

PS: You might want to remove your other question that I just found... Generally editing a question to include extra informations is better than posting a new question asking the same thing but with more information

来源：https://stackoverflow.com/questions/6483261/groovy-swingbuilder-controlling-the-style-of-the-tabs-titles-in-jtabbedpane

标签

groovy

coding-style

tabs

jtabbedpane

swingbuilder