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package javax.swing.plaf.basic;

import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.plaf.*;
import java.awt.*;
import java.awt.event.*;


BasicPanel implementation
Author:Steve Wilson
/** * BasicPanel implementation * * @author Steve Wilson */
public class BasicPanelUI extends PanelUI { // Shared UI object private static PanelUI panelUI;
Constructs a BasicPanelUI.
/** * Constructs a {@code BasicPanelUI}. */
public BasicPanelUI() {}
Returns an instance of BasicPanelUI.
Params:
  • c – a component
Returns:an instance of BasicPanelUI
/** * Returns an instance of {@code BasicPanelUI}. * * @param c a component * @return an instance of {@code BasicPanelUI} */
public static ComponentUI createUI(JComponent c) { if(panelUI == null) { panelUI = new BasicPanelUI(); } return panelUI; } public void installUI(JComponent c) { JPanel p = (JPanel)c; super.installUI(p); installDefaults(p); } public void uninstallUI(JComponent c) { JPanel p = (JPanel)c; uninstallDefaults(p); super.uninstallUI(c); }
Method for installing panel properties.
Params:
  • p – an instance of JPanel
/** * Method for installing panel properties. * * @param p an instance of {@code JPanel} */
protected void installDefaults(JPanel p) { LookAndFeel.installColorsAndFont(p, "Panel.background", "Panel.foreground", "Panel.font"); LookAndFeel.installBorder(p,"Panel.border"); LookAndFeel.installProperty(p, "opaque", Boolean.TRUE); }
Method for uninstalling panel properties.
Params:
  • p – an instance of JPanel
/** * Method for uninstalling panel properties. * * @param p an instance of {@code JPanel} */
protected void uninstallDefaults(JPanel p) { LookAndFeel.uninstallBorder(p); }
Returns the baseline.
Throws:
See Also:
Since:1.6
/** * Returns the baseline. * * @throws NullPointerException {@inheritDoc} * @throws IllegalArgumentException {@inheritDoc} * @see javax.swing.JComponent#getBaseline(int, int) * @since 1.6 */
public int getBaseline(JComponent c, int width, int height) { super.getBaseline(c, width, height); Border border = c.getBorder(); if (border instanceof AbstractBorder) { return ((AbstractBorder)border).getBaseline(c, width, height); } return -1; }
Returns an enum indicating how the baseline of the component changes as the size changes.
Throws:
  • NullPointerException – {@inheritDoc}
See Also:
Since:1.6
/** * Returns an enum indicating how the baseline of the component * changes as the size changes. * * @throws NullPointerException {@inheritDoc} * @see javax.swing.JComponent#getBaseline(int, int) * @since 1.6 */
public Component.BaselineResizeBehavior getBaselineResizeBehavior( JComponent c) { super.getBaselineResizeBehavior(c); Border border = c.getBorder(); if (border instanceof AbstractBorder) { return ((AbstractBorder)border).getBaselineResizeBehavior(c); } return Component.BaselineResizeBehavior.OTHER; } }