Java JList.getBackground方法代码示例

import javax.swing.JList; //导入方法依赖的package包/类
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
    if (!(value instanceof TreeListNode)) {
        //shoudln't happen
        return new JLabel();
    }
    TreeListNode node = (TreeListNode) value;
    int rowHeight = list.getFixedCellHeight();
    int rowWidth = list.getVisibleRect().width;
    int dropIndex = -1;
    DropLocation dropLocation = list.getDropLocation();
    if (dropLocation != null && !dropLocation.isInsert()) {
        dropIndex = dropLocation.getIndex();
    }
    boolean isDropTarget = dropIndex == index;
    isSelected = isSelected || isDropTarget;
    Color background = isSelected ? list.getSelectionBackground() : list.getBackground();
    Color foreground = isSelected ? list.getSelectionForeground() : list.getForeground();

    return node.getRenderer(foreground, background, isSelected, cellHasFocus, rowHeight, rowWidth);
}
 

import javax.swing.JList; //导入方法依赖的package包/类
@Override
public Component getListCellRendererComponent( JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus ) {
    if (!(value instanceof ListNode)) {
        //shoudln't happen
        return new JLabel();
    }
    if( list instanceof SelectionList ) {
        isSelected |= index == ((SelectionList)list).getMouseOverRow();
    }
    ListNode node = (ListNode) value;
    int rowHeight = list.getFixedCellHeight();
    int rowWidth = list.getWidth();
    JScrollPane scroll = ( JScrollPane ) SwingUtilities.getAncestorOfClass( JScrollPane.class, list);
    if( null != scroll )
        rowWidth = scroll.getViewport().getWidth();
    Color background = isSelected ? list.getSelectionBackground() : list.getBackground();
    Color foreground = isSelected ? list.getSelectionForeground() : list.getForeground();

    return node.getListRenderer(foreground, background, isSelected, cellHasFocus, rowHeight, rowWidth);
}
 

import javax.swing.JList; //导入方法依赖的package包/类
/** Configures a list cell renderer and sets up sizing and the 
 * backing image from it */
public boolean configure (Object nd, JScrollPane tv, JList list, int row) {
    boolean sameVn = setLastRendereredObject(nd);
    boolean sameComp = setLastRenderedScrollPane (tv);
    Component renderer = null;
    bg = list.getBackground();
    boolean sel = list.isSelectionEmpty() ? false :
        list.getSelectionModel().isSelectedIndex(row);
    renderer = list.getCellRenderer().getListCellRendererComponent(list, nd, row, sel, false);
    if (renderer != null) {
        setComponent (renderer, list);
    }
    return true;
}
 

import javax.swing.JList; //导入方法依赖的package包/类
public Renderer(JList list) {
    setFont(list.getFont());
    fgColor = list.getForeground();
    bgColor = list.getBackground();
    bgColorDarker = new Color(Math.abs(bgColor.getRed() - DARKER_COLOR_COMPONENT),
            Math.abs(bgColor.getGreen() - DARKER_COLOR_COMPONENT),
            Math.abs(bgColor.getBlue() - DARKER_COLOR_COMPONENT));
    bgSelectionColor = list.getSelectionBackground();
    fgSelectionColor = list.getSelectionForeground();
}
 

import javax.swing.JList; //导入方法依赖的package包/类
public Renderer( JList list ) {
    setFont( list.getFont() );            
    fgColor = list.getForeground();
    bgColor = list.getBackground();
    bgColorDarker = new Color(
                            Math.abs(bgColor.getRed() - DARKER_COLOR_COMPONENT),
                            Math.abs(bgColor.getGreen() - DARKER_COLOR_COMPONENT),
                            Math.abs(bgColor.getBlue() - DARKER_COLOR_COMPONENT)
                    );
    bgSelectionColor = list.getSelectionBackground();
    fgSelectionColor = list.getSelectionForeground();        
}
 

import javax.swing.JList; //导入方法依赖的package包/类
@Override
public Component getListCellRendererComponent(JList<? extends AuthenticationCheckboxListItem> list, AuthenticationCheckboxListItem value,
        int index, boolean isSelected, boolean cellHasFocus) {
    final Color bc;
    final Color fc;
    if (isSelected) {
        bc = UIManager.getColor("List.selectionBackground"); //NOI18N
        fc = UIManager.getColor("List.selectionForeground"); //NOI18N
    } else {
        bc = list.getBackground();
        fc = list.getForeground();
    }
    setBackground(bc); // NOI18N
    setForeground(fc); // NOI18N
    
    label.setBackground(bc);
    label.setForeground(fc);
    label.setText(value.getDisplayName());
    label.setFont(list.getFont());
    
    check.setSelected(value.isSelected());
    check.setBackground(bc);
    check.setForeground(fc);
    check.setEnabled(list.isEnabled());
    
    Border border;
    if (cellHasFocus) {
        border = focusBorder;
    } else {
        border = noFocusBorder;
    }
    setBorder(border);
    
    return this;
}
 

import javax.swing.JList; //导入方法依赖的package包/类
/**
 * Returns the renderer.
 *
 * @param list The list of choices being rendered.
 * @param value The {@link Completion} being rendered.
 * @param index The index into <code>list</code> being rendered.
 * @param selected Whether the item is selected.
 * @param hasFocus Whether the item has focus.
 */
@Override
public Component getListCellRendererComponent(JList list, Object value,
					int index, boolean selected, boolean hasFocus) {

	super.getListCellRendererComponent(list,value,index,selected,hasFocus);
	if (font!=null) {
		setFont(font); // Overrides super's setFont(list.getFont()).
	}
	this.selected = selected;
	this.realBG = altBG!=null && (index&1)==1 ? altBG : list.getBackground();

	Completion c = (Completion)value;
	setIcon(c.getIcon());

	if (c instanceof FunctionCompletion) {
		FunctionCompletion fc = (FunctionCompletion)value;
		prepareForFunctionCompletion(list, fc, index, selected, hasFocus);
	}
	else if (c instanceof VariableCompletion) {
		VariableCompletion vc = (VariableCompletion)value;
		prepareForVariableCompletion(list, vc, index, selected, hasFocus);
	}
	else if (c instanceof TemplateCompletion) {
		TemplateCompletion tc = (TemplateCompletion)value;
		prepareForTemplateCompletion(list, tc, index, selected, hasFocus);
	}
	else if (c instanceof MarkupTagCompletion) {
		MarkupTagCompletion mtc = (MarkupTagCompletion)value;
		prepareForMarkupTagCompletion(list, mtc, index, selected, hasFocus);
	}
	else {
		prepareForOtherCompletion(list, c, index, selected, hasFocus);
	}

	// A delegate renderer might do its own alternate row striping
	// (Substance does).
	if (delegate!=null) {
		delegate.getListCellRendererComponent(list, getText(), index,
				selected, hasFocus);
		delegate.setFont(getFont());
		delegate.setIcon(getIcon());
		return delegate;
	}

	if (!selected && (index&1)==1 && altBG!=null) {
		setBackground(altBG);
	}

	return this;

}