/* BasicBorders.java --
Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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package javax.swing.plaf.basic;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import java.io.Serializable;
import javax.swing.AbstractButton;
import javax.swing.ButtonModel;
import javax.swing.JButton;
import javax.swing.JPopupMenu;
import javax.swing.JSplitPane;
import javax.swing.JToolBar;
import javax.swing.UIDefaults;
import javax.swing.UIManager;
import javax.swing.border.AbstractBorder;
import javax.swing.border.BevelBorder;
import javax.swing.border.Border;
import javax.swing.plaf.BorderUIResource;
import javax.swing.plaf.UIResource;
import javax.swing.text.JTextComponent;
/**
* Provides various borders for the Basic look and feel.
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public class BasicBorders
{
/**
* A MarginBorder that gets shared by multiple components.
* Created on demand by the private helper function {@link
* #getMarginBorder()}.
*/
private static MarginBorder sharedMarginBorder;
/**
* Returns a border for drawing push buttons.
*
* <p>The colors of the border are retrieved from the
* <code>UIDefaults</code> of the currently active look and feel
* using the keys <code>“Button.shadow”</code>,
* <code>“Button.darkShadow”</code>,
* <code>“Button.light”</code>, and
* <code>“Button.highlight”</code>.
*
* <p><img src="doc-files/BasicBorders.ButtonBorder-1.png" width="300"
* height="170" alt="[A screen shot of the returned border]" />
*
* @return a {@link
* javax.swing.plaf.BorderUIResource#CompoundBorderUIResource}
* whose outer border is a {@link #ButtonBorder} and whose
* inner border is a {@link #MarginBorder}.
*/
public static Border getButtonBorder()
{
UIDefaults defaults;
Border outer;
defaults = UIManager.getLookAndFeelDefaults();
/* The keys for UIDefaults have been determined by writing a
* test program that dumps the UIDefaults to stdout; that program
* was run on a JDK 1.4.1_01 for GNU/Linux. Note that in the API,
* the key "light" is usually called "highlight", and "highlight"
* is usually called "lightHighlight".
*/
outer = new ButtonBorder(defaults.getColor("Button.shadow"),
defaults.getColor("Button.darkShadow"),
defaults.getColor("Button.light"),
defaults.getColor("Button.highlight"));
/* While the inner border is shared between multiple buttons,
* we do not share the outer border because ButtonBorders store
* their border colors. We cannot guarantee that the colors
* (which come from UIDefaults) are unchanged between invocations
* of getButtonBorder. We could store the last colors, and share
* the button border if the colors are the same as in the last
* invocation, but it probably is not worth the effort.
*/
return new BorderUIResource.CompoundBorderUIResource(
outer,
/* inner */ getMarginBorder());
}
/**
* Returns a border for drawing radio buttons.
*
* <p>The colors of the border are retrieved from the
* <code>UIDefaults</code> of the currently active look and feel
* using the keys <code>“RadioButton.shadow”</code>,
* <code>“RadioButton.darkShadow”</code>,
* <code>“RadioButton.light”</code>, and
* <code>“RadioButton.highlight”</code>.
*
* <p><img src="doc-files/BasicBorders.RadioButtonBorder-1.png" width="300"
* height="135" alt="[A screen shot of the returned border]" />
*
* @return a {@link
* javax.swing.plaf.BorderUIResource#CompoundBorderUIResource}
* whose outer border is a {@link #RadioButtonBorder} and whose
* inner border is a {@link #MarginBorder}.
*/
public static Border getRadioButtonBorder()
{
UIDefaults defaults;
Border outer;
defaults = UIManager.getLookAndFeelDefaults();
/* The keys for UIDefaults have been determined by writing a
* test program that dumps the UIDefaults to stdout; that program
* was run on a JDK 1.4.1_01 for GNU/Linux. Note that in the API,
* the key "light" is usually called "highlight", and "highlight"
* is usually called "lightHighlight".
*/
outer = new RadioButtonBorder(
defaults.getColor("RadioButton.shadow"),
defaults.getColor("RadioButton.darkShadow"),
defaults.getColor("RadioButton.light"),
defaults.getColor("RadioButton.highlight"));
/* While the inner border is shared between multiple buttons, we
* do not share the outer border because RadioButtonBorders, being
* ButtonBorders, store their border colors. We cannot guarantee
* that the colors (which come from UIDefaults) are unchanged
* between invocations of getButtonBorder. We could store the last
* colors, and share the button border if the colors are the same
* as in the last invocation, but it probably is not worth the
* effort.
*/
return new BorderUIResource.CompoundBorderUIResource(
outer,
/* inner */ getMarginBorder());
}
/**
* Returns a border for drawing toggle buttons.
*
* <p>The colors of the border are retrieved from the
* <code>UIDefaults</code> of the currently active look and feel
* using the keys <code>“ToggleButton.shadow”</code>,
* <code>“ToggleButton.darkShadow”</code>,
* <code>“ToggleButton.light”</code>, and
* <code>“ToggleButton.highlight”</code>.
*
* <p><img src="doc-files/BasicBorders.ToggleButtonBorder-1.png" width="270"
* height="135" alt="[A screen shot of the returned border]" />
*
* @return a {@link
* javax.swing.plaf.BorderUIResource#CompoundBorderUIResource}
* whose outer border is a {@link #ToggleButtonBorder} and whose
* inner border is a {@link #MarginBorder}.
*/
public static Border getToggleButtonBorder()
{
UIDefaults defaults;
Border outer;
defaults = UIManager.getLookAndFeelDefaults();
/* The keys for UIDefaults have been determined by writing a
* test program that dumps the UIDefaults to stdout; that program
* was run on a JDK 1.4.1_01 for GNU/Linux. Note that in the API,
* the key "light" is usually called "highlight", and "highlight"
* is usually called "lightHighlight".
*/
outer = new ToggleButtonBorder(
defaults.getColor("ToggleButton.shadow"),
defaults.getColor("ToggleButton.darkShadow"),
defaults.getColor("ToggleButton.light"),
defaults.getColor("ToggleButton.highlight"));
/* While the inner border is shared between multiple buttons, we
* do not share the outer border because ToggleButtonBorders, being
* ButtonBorders, store their border colors. We cannot guarantee
* that the colors (which come from UIDefaults) are unchanged
* between invocations of getButtonBorder. We could store the last
* colors, and share the button border if the colors are the same
* as in the last invocation, but it probably is not worth the
* effort.
*/
return new BorderUIResource.CompoundBorderUIResource(
outer,
/* inner */ getMarginBorder());
}
/**
* Returns a border for drawing a two-pixel thick separator line
* below menu bars.
*
* <p>The colors of the border are retrieved from the
* <code>UIDefaults</code> of the currently active look and feel
* using the keys <code>“MenuBar.shadow”</code> and
* <code>“MenuBar.highlight”</code>.
*
* <p><img src="doc-files/BasicBorders.MenuBarBorder-1.png" width="500"
* height="140" alt="[A screen shot of a JMenuBar with this border]" />
*
* @return a {@link #MenuBarBorder}.
*
* @see javax.swing.JMenuBar
*/
public static Border getMenuBarBorder()
{
UIDefaults defaults;
/* See comment in methods above for why this border is not shared. */
defaults = UIManager.getLookAndFeelDefaults();
return new MenuBarBorder(defaults.getColor("MenuBar.shadow"),
defaults.getColor("MenuBar.highlight"));
}
/**
* Returns a border for drawing a one-pixel thick border around
* split panes that are interrupted where the divider joins the
* border.
*
* <p>The colors of the border are retrieved from the
* <code>UIDefaults</code> of the currently active look and feel
* using the keys <code>“SplitPane.darkShadow”</code> and
* <code>“SplitPane.highlight”</code>.
*
* <p><img src="doc-files/BasicBorders.SplitPaneBorder-1.png" width="520"
* height="200" alt="[A screen shot for JSplitPane.HORIZONTAL_SPLIT]" />
*
* <p><img src="doc-files/BasicBorders.SplitPaneBorder-2.png" width="520"
* height="200" alt="[A screen shot for JSplitPane.VERTICAL_SPLIT]" />
*
* @return a {@link #SplitPaneBorder}.
*
* @see javax.swing.JSplitPane
* @see #getSplitPaneDividerBorder()
*/
public static Border getSplitPaneBorder()
{
UIDefaults defaults;
/* See comment in methods above for why this border is not shared. */
defaults = UIManager.getLookAndFeelDefaults();
return new SplitPaneBorder(defaults.getColor("SplitPane.highlight"),
defaults.getColor("SplitPane.darkShadow"));
}
/**
* Returns a border for drawing a one-pixel thick border around
* the divider of split panes.
*
* <p>The colors of the edges that are adjacent to the child components
* of the <code>JSplitPane</code> are retrieved from the
* <code>UIDefaults</code> of the currently active look and feel
* using the keys <code>“SplitPane.darkShadow”</code> and
* <code>“SplitPane.highlight”</code>. The color of the
* other two edges is the background color of the divider.
*
* <p><img src="doc-files/BasicBorders.SplitPaneDividerBorder-1.png"
* width="520" height="200" alt=
* "[A screen shot for JSplitPane.HORIZONTAL_SPLIT]" />
*
* @return an instance of <code>SplitPaneDividerBorder</code>, which is
* not a public API class of this package.
*
* @see javax.swing.JSplitPane
* @see javax.swing.plaf.basic.BasicSplitPaneDivider
* @see #getSplitPaneBorder()
*
* @since 1.3
*/
public static Border getSplitPaneDividerBorder()
{
UIDefaults defaults;
/* See comment in methods above for why this border is not shared. */
defaults = UIManager.getLookAndFeelDefaults();
return new SplitPaneDividerBorder(
defaults.getColor("SplitPane.highlight"),
defaults.getColor("SplitPane.darkShadow"));
}
/**
* Returns a border for drawing a border around a text field
* that makes the field appear as etched into the surface.
*
* <p>The colors of the border are retrieved from the
* <code>UIDefaults</code> of the currently active look and feel
* using the keys <code>“TextField.shadow”</code>,
* <code>“TextField.darkShadow”</code>,
* <code>“TextField.light”</code>, and
* <code>“TextField.highlight”</code>.
*
* <p><img src="doc-files/BasicBorders.FieldBorder-1.png" width="500"
* height="200" alt="[A screen shot of a border returned by
* this method]" />
*
* @return an instance of
* {@link javax.swing.plaf.basic.BasicBorders$FieldBorder}.
*
* @see javax.swing.JTextField
* @see javax.swing.text.JTextComponent
*/
public static Border getTextFieldBorder()
{
UIDefaults defaults;
/* See comment in methods above for why this border is not shared. */
defaults = UIManager.getLookAndFeelDefaults();
return new FieldBorder(
defaults.getColor("TextField.shadow"),
defaults.getColor("TextField.darkShadow"),
defaults.getColor("TextField.light"),
defaults.getColor("TextField.highlight"));
}
/**
* Returns a two-pixel thick, green
* <code>LineBorderUIResource</code>. This is so ugly that look and
* feels better use different borders for their progress bars, or
* they will look really terrible.
*
* <p><img src="doc-files/BasicBorders-1.png" width="120" height="80"
* alt="[A screen shot of a border returned by this method]" />
*/
public static Border getProgressBarBorder()
{
/* There does not seem to exist a way to parametrize the color
* or thickness of the border through UIDefaults.
*/
return new BorderUIResource.LineBorderUIResource(Color.green, 2);
}
/**
* Returns a border that is composed of a raised bevel border and a
* one-pixel thick line border.
*
* <p><img src="doc-files/BasicBorders-2.png" width="300" height="200"
* alt="[A screen shot of a border returned by this method]" />
*
* <p>The colors of the border are retrieved from the
* <code>UIDefaults</code> of the currently active look and feel
* using the keys <code>“InternalFrame.borderShadow”</code>,
* <code>“InternalFrame.borderDarkShadow”</code>,
* <code>“InternalFrame.borderLight”</code>,
* <code>“InternalFrame.borderHighlight”</code>, and
* (for the inner one-pixel thick line)
* <code>“InternalFrame.borderColor”</code>.
*/
public static Border getInternalFrameBorder()
{
UIDefaults defaults;
Color shadow, darkShadow, highlight, lightHighlight, line;
/* See comment in methods above for why this border is not shared. */
defaults = UIManager.getLookAndFeelDefaults();
shadow = defaults.getColor("InternalFrame.borderShadow");
darkShadow = defaults.getColor("InternalFrame.borderDarkShadow");
highlight = defaults.getColor("InternalFrame.borderLight");
lightHighlight = defaults.getColor("InternalFrame.borderHighlight");
line = defaults.getColor("InternalFrame.borderColor");
return new BorderUIResource.CompoundBorderUIResource(
/* outer border */
new BorderUIResource.BevelBorderUIResource(
BevelBorder.RAISED,
(highlight != null) ? highlight : Color.lightGray,
(lightHighlight != null) ? lightHighlight : Color.white,
(darkShadow != null) ? darkShadow : Color.black,
(shadow != null) ? shadow : Color.gray),
/* inner border */
new BorderUIResource.LineBorderUIResource(
(line != null) ? line : Color.lightGray));
}
/**
* Returns a shared MarginBorder.
*/
static Border getMarginBorder() // intentionally not public
{
/* Swing is not designed to be thread-safe, so there is no
* need to synchronize the access to the global variable.
*/
if (sharedMarginBorder == null)
sharedMarginBorder = new MarginBorder();
return sharedMarginBorder;
}
/**
* A border whose appearance depends on the state of
* the enclosed button.
*
* <p><img src="doc-files/BasicBorders.ButtonBorder-1.png" width="300"
* height="170" alt="[A screen shot of this border]" />
*
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public static class ButtonBorder
extends AbstractBorder
implements Serializable, UIResource
{
/**
* Determined using the <code>serialver</code> tool
* of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.
*/
static final long serialVersionUID = -157053874580739687L;
/**
* The color for drawing the shaded parts of the border.
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*/
protected Color shadow;
/**
* The color for drawing the dark shaded parts of the border.
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*/
protected Color darkShadow;
/**
* The color for drawing the highlighted parts of the border.
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*/
protected Color highlight;
/**
* The color for drawing the bright highlighted parts of the border.
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*/
protected Color lightHighlight;
/**
* Constructs a new border for drawing a button in the Basic
* look and feel.
*
* @param shadow the shadow color.
* @param darkShadow a darker variant of the shadow color.
* @param highlight the highlight color.
* @param lightHighlight a brighter variant of the highlight color.
*/
public ButtonBorder(Color shadow, Color darkShadow,
Color highlight, Color lightHighlight)
{
/* These colors usually come from the UIDefaults of the current
* look and feel. Use fallback values if the colors are not
* supplied. The API specification is silent about what
* behavior is expected for null colors, so users should not
* rely on this fallback (which is why it is not documented in
* the above Javadoc).
*/
this.shadow = (shadow != null) ? shadow : Color.gray;
this.darkShadow = (darkShadow != null) ? darkShadow : Color.black;
this.highlight = (highlight != null) ? highlight : Color.lightGray;
this.lightHighlight = (lightHighlight != null)
? lightHighlight
: Color.white;
}
/**
* Paints the ButtonBorder around a given component.
*
* @param c the component whose border is to be painted.
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*/
public void paintBorder(Component c, Graphics g,
int x, int y, int width, int height)
{
ButtonModel bmodel = null;
if (c instanceof AbstractButton)
bmodel = ((AbstractButton) c).getModel();
BasicGraphicsUtils.drawBezel(
g, x, y, width, height,
/* pressed */ (bmodel != null)
&& /* mouse button pressed */ bmodel.isPressed()
&& /* mouse inside */ bmodel.isArmed(),
/* default */ (c instanceof JButton)
&& ((JButton) c).isDefaultButton(),
shadow, darkShadow, highlight, lightHighlight);
}
/**
* Measures the width of this border.
*
* <p>Although the thickness of the actually painted border
* depends on the state of the enclosed component, this
* measurement always returns the same amount of pixels. Indeed,
* it would be rather confusing if a button was appearing to
* change its size depending on whether it is pressed or not.
*
* @param c the component whose border is to be measured.
*
* @return an Insets object whose <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @see #getBorderInsets(java.awt.Component, java.awt.Insets)
*/
public Insets getBorderInsets(Component c)
{
/* There is no obvious reason for overriding this method, but we
* try to have exactly the same API as the Sun reference
* implementation.
*/
return getBorderInsets(c, null);
}
/**
* Measures the width of this border, storing the results into a
* pre-existing Insets object.
*
* <p>Although the thickness of the actually painted border
* depends on the state of the enclosed component, this
* measurement always returns the same amount of pixels. Indeed,
* it would be rather confusing if a button was appearing to
* change its size depending on whether it is pressed or not.
*
* @param insets an Insets object for holding the result values.
* After invoking this method, the <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @return the same object that was passed for <code>insets</code>.
*
* @see #getBorderInsets()
*/
public Insets getBorderInsets(Component c, Insets insets)
{
/* The exact amount has been determined using a test program
* that was run on the Sun reference implementation. With
* Apple/Sun JDK 1.3.1 on MacOS X 10.1.5, the result is
* [3, 3, 3, 3]. With Sun JDK 1.4.1_01 on Linux/x86, the
* result is [2, 3, 3, 3]. We use the values from the 1.4.1_01
* release.
*/
if (insets == null)
return new Insets(2, 3, 3, 3);
insets.top = 2;
insets.bottom = insets.left = insets.right = 3;
return insets;
}
}
/**
* A border that makes its enclosed component appear as lowered
* into the surface. Typically used for text fields.
*
* <p><img src="doc-files/BasicBorders.FieldBorder-1.png" width="500"
* height="200" alt="[A screen shot of this border]" />
*
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawEtchedRect
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public static class FieldBorder
extends AbstractBorder
implements UIResource
{
/**
* Determined using the <code>serialver</code> tool
* of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.
*/
static final long serialVersionUID = 949220756998454908L;
/**
* The color for drawing the outer half of the top and left
* edges.
*/
protected Color shadow;
/**
* The color for drawing the inner half of the top and left
* edges.
*/
protected Color darkShadow;
/**
* The color for drawing the inner half of the bottom and right
* edges.
*/
protected Color highlight;
/**
* The color for drawing the outer half of the bottom and right
* edges.
*/
protected Color lightHighlight;
/**
* Constructs a new border for drawing a text field in the Basic
* look and feel.
*
* @param shadow the color for drawing the outer half
* of the top and left edges.
*
* @param darkShadow the color for drawing the inner half
* of the top and left edges.
*
* @param highlight the color for drawing the inner half
* of the bottom and right edges.
*
* @param lightHighlight the color for drawing the outer half
* of the bottom and right edges.
*/
public FieldBorder(Color shadow, Color darkShadow,
Color highlight, Color lightHighlight)
{
/* These colors usually come from the UIDefaults of the current
* look and feel. Use fallback values if the colors are not
* supplied. The API specification is silent about what
* behavior is expected for null colors, so users should not
* rely on this fallback (which is why it is not documented in
* the above Javadoc).
*/
this.shadow = (shadow != null) ? shadow : Color.gray;
this.darkShadow = (darkShadow != null) ? darkShadow : Color.black;
this.highlight = (highlight != null) ? highlight : Color.lightGray;
this.lightHighlight = (lightHighlight != null)
? lightHighlight : Color.white;
}
/**
* Paints the FieldBorder around a given component.
*
* @param c the component whose border is to be painted.
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawEtchedRect
*/
public void paintBorder(Component c, Graphics g,
int x, int y, int width, int height)
{
BasicGraphicsUtils.drawEtchedRect(g, x, y, width, height,
shadow, darkShadow,
highlight, lightHighlight);
}
/**
* Measures the width of this border.
*
* @param c the component whose border is to be measured.
* If <code>c</code> is an instance of {@link
* javax.swing.text.JTextComponent}, its margin is
* added to the border size.
*
* @return an Insets object whose <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @see #getBorderInsets(java.awt.Component, java.awt.Insets)
*/
public Insets getBorderInsets(Component c)
{
return getBorderInsets(c, null);
}
/**
* Measures the width of this border, storing the results into a
* pre-existing Insets object.
*
* @param c the component whose border is to be measured.
* If <code>c</code> is an instance of {@link
* javax.swing.text.JTextComponent}, its margin is
* added to the border size.
*
* @param insets an Insets object for holding the result values.
* After invoking this method, the <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @return the same object that was passed for <code>insets</code>.
*
* @see #getBorderInsets()
*/
public Insets getBorderInsets(Component c, Insets insets)
{
if (insets == null)
insets = new Insets(2, 2, 2, 2);
else
insets.top = insets.left = insets.bottom = insets.right = 2;
if (c instanceof JTextComponent)
{
Insets margin = ((JTextComponent) c).getMargin();
insets.top += margin.top;
insets.left += margin.left;
insets.bottom += margin.bottom;
insets.right += margin.right;
}
return insets;
}
}
/**
* An invisible, but spacing border whose margin is determined
* by calling the <code>getMargin()</code> method of the enclosed
* component. If the enclosed component has no such method,
* this border will not occupy any space.
*
* <p><img src="doc-files/BasicBorders.MarginBorder-1.png" width="325"
* height="200" alt="[An illustration that shows how MarginBorder
* determines its borders]" />
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public static class MarginBorder
extends AbstractBorder
implements Serializable, UIResource
{
/**
* Determined using the <code>serialver</code> tool
* of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.
*/
static final long serialVersionUID = -3035848353448896090L;
/**
* Constructs a new MarginBorder.
*/
public MarginBorder()
{
}
/**
* Measures the width of this border.
*
* @param c the component whose border is to be measured.
*
* @return an Insets object whose <code>left</code>, <code>right</code>,
* <code>top</code> and <code>bottom</code> fields indicate the
* width of the border at the respective edge.
*
* @see #getBorderInsets(java.awt.Component, java.awt.Insets)
*/
public Insets getBorderInsets(Component c)
{
return getBorderInsets(c, new Insets(0, 0, 0, 0));
}
/**
* Determines the insets of this border by calling the
* <code>getMargin()</code> method of the enclosed component. The
* resulting margin will be stored into the the <code>left</code>,
* <code>right</code>, <code>top</code> and <code>bottom</code>
* fields of the passed <code>insets</code> parameter.
*
* <p>Unfortunately, <code>getMargin()</code> is not a method of
* {@link javax.swing.JComponent} or some other common superclass
* of things with margins. While reflection could be used to
* determine the existence of this method, this would be slow on
* many virtual machines. Therefore, the current implementation
* knows about {@link javax.swing.AbstractButton#getMargin()},
* {@link javax.swing.JPopupMenu#getMargin()}, {@link
* javax.swing.JToolBar#getMargin()}, and {@link
* javax.swing.text.JTextComponent}. If <code>c</code> is an
* instance of a known class, the respective
* <code>getMargin()</code> method is called to determine the
* correct margin. Otherwise, a zero-width margin is returned.
*
* @param c the component whose border is to be measured.
*
* @return the same object that was passed for <code>insets</code>,
* but with changed fields.
*/
public Insets getBorderInsets(Component c, Insets insets)
{
Insets margin = null;
/* This is terrible object-oriented design. See the above Javadoc
* for an excuse.
*/
if (c instanceof AbstractButton)
margin = ((AbstractButton) c).getMargin();
else if (c instanceof JPopupMenu)
margin = ((JPopupMenu) c).getMargin();
else if (c instanceof JToolBar)
margin = ((JToolBar) c).getMargin();
else if (c instanceof JTextComponent)
margin = ((JTextComponent) c).getMargin();
if (margin == null)
insets.top = insets.left = insets.bottom = insets.right = 0;
else
{
insets.top = margin.top;
insets.left = margin.left;
insets.bottom = margin.bottom;
insets.right = margin.right;
}
return insets;
}
}
/**
* A border for drawing a separator line below JMenuBar.
*
* <p><img src="doc-files/BasicBorders.MenuBarBorder-1.png" width="500"
* height="140" alt="[A screen shot of a JMenuBar with this border]" />
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public static class MenuBarBorder
extends AbstractBorder
implements UIResource
{
/**
* Determined using the <code>serialver</code> tool
* of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.
*/
static final long serialVersionUID = -6909056571935227506L;
/**
* The shadow color, which is used for the upper line of the
* two-pixel thick bottom edge.
*/
private Color shadow;
/**
* The highlight color, which is used for the lower line of the
* two-pixel thick bottom edge.
*/
private Color highlight;
/**
* Constructs a new MenuBarBorder for drawing a JMenuBar in
* the Basic look and feel.
*
* <p><img src="doc-files/BasicBorders.MenuBarBorder-1.png" width="500"
* height="140" alt="[A screen shot of a JMenuBar with this
* border]" />
*
* @param shadow the shadow color, which is used for the upper
* line of the two-pixel thick bottom edge.
*
* @param highlight the shadow color, which is used for the lower
* line of the two-pixel thick bottom edge.
*/
public MenuBarBorder(Color shadow, Color highlight)
{
/* These colors usually come from the UIDefaults of the current
* look and feel. Use fallback values if the colors are not
* supplied. The API specification is silent about what
* behavior is expected for null colors, so users should not
* rely on this fallback (which is why it is not documented in
* the above Javadoc).
*/
this.shadow = (shadow != null) ? shadow : Color.gray;
this.highlight = (highlight != null) ? highlight : Color.white;
}
/**
* Paints the MenuBarBorder around a given component.
*
* @param c the component whose border is to be painted, usually
* an instance of {@link javax.swing.JMenuBar}.
*
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*/
public void paintBorder(Component c, Graphics g,
int x, int y, int width, int height)
{
Color oldColor;
/* To understand this code, it might be helpful to look at the
* image "BasicBorders.MenuBarBorder-1.png" that is included
* with the JavaDoc. It is located in the "doc-files"
* subdirectory.
*/
oldColor = g.getColor();
y = y + height - 2;
try
{
g.setColor(shadow);
g.drawLine(x, y, x + width - 2, y);
g.drawLine(x, y + 1, x, y + 1);
g.drawLine(x + width - 2, y + 1, x + width - 2, y + 1);
g.setColor(highlight);
g.drawLine(x + 1, y + 1, x + width - 3, y + 1);
g.drawLine(x + width - 1, y, x + width - 1, y + 1);
}
finally
{
g.setColor(oldColor);
}
}
/**
* Measures the width of this border.
*
* @param c the component whose border is to be measured.
*
* @return an Insets object whose <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @see #getBorderInsets(java.awt.Component, java.awt.Insets)
*/
public Insets getBorderInsets(Component c)
{
/* There is no obvious reason for overriding this method, but we
* try to have exactly the same API as the Sun reference
* implementation.
*/
return getBorderInsets(c, null);
}
/**
* Measures the width of this border, storing the results into a
* pre-existing Insets object.
*
* @param insets an Insets object for holding the result values.
* After invoking this method, the <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @return the same object that was passed for <code>insets</code>.
*
* @see #getBorderInsets()
*/
public Insets getBorderInsets(Component c, Insets insets)
{
/* The exact amount has been determined using a test program
* that was run on the Apple/Sun JDK 1.3.1 on MacOS X, and the
* Sun JDK 1.4.1_01 on GNU/Linux for x86. Both gave [0,0,2,0],
* which was expected from looking at the screen shot.
*/
if (insets == null)
return new Insets(0, 0, 2, 0);
insets.left = insets.right = insets.top = 0;
insets.bottom = 2;
return insets;
}
}
/**
* A border for drawing radio buttons in the Basic look and feel.
*
* <p><img src="doc-files/BasicBorders.RadioButtonBorder-1.png" width="300"
* height="135" alt="[A screen shot of this border]" />
*
* <p>Note about the screen shot: Normally, the
* <code>borderPainted</code> property is <code>false</code> for
* JRadioButtons. For this screen shot, it has been set to
* <code>true</code> so the borders get drawn. Also, a
* concretization of the Basic look and would typically provide
* icons for the various states of radio buttons.
*
* <p>Note that the focus rectangle is invisible If the radio button
* is currently selected. While it might be debatable whether this
* makes a lot of sense, this behavior can be observed in the Sun
* reference implementation (in JDK 1.3.1 and 1.4.1). The Classpath
* implementation tries to exactly replicate the JDK appearance.
*
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public static class RadioButtonBorder
extends ButtonBorder
{
/**
* Determined using the <code>serialver</code> tool
* of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.
*/
static final long serialVersionUID = 1596945751743747369L;
/**
* Constructs a new border for drawing a JRadioButton in
* the Basic look and feel.
*
* @param shadow the shadow color.
* @param darkShadow a darker variant of the shadow color.
* @param highlight the highlight color.
* @param lightHighlight a brighter variant of the highlight color.
*/
public RadioButtonBorder(Color shadow, Color darkShadow,
Color highlight, Color lightHighlight)
{
/* The superclass ButtonBorder substitutes null arguments
* with fallback colors.
*/
super(shadow, darkShadow, highlight, lightHighlight);
}
/**
* Paints the RadioButtonBorder around a given component.
*
* <p>The Sun implementation always seems to draw exactly
* the same border, irrespective of the state of the button.
* This is rather surprising, but GNU Classpath emulates the
* observable behavior.
*
* @param c the component whose border is to be painted.
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*/
public void paintBorder(Component c, Graphics g,
int x, int y, int width, int height)
{
AbstractButton button = null;
ButtonModel bmodel = null;
boolean lowered = false;
boolean focused = false;
if (c instanceof AbstractButton)
{
button = (AbstractButton) c;
bmodel = button.getModel();
}
if (bmodel != null)
{
lowered = button.isSelected()
|| (/* mouse inside */ bmodel.isArmed() && bmodel.isPressed());
focused = button.hasFocus() && button.isFocusPainted();
}
if (lowered)
BasicGraphicsUtils.drawLoweredBezel(g, x, y, width, height,
shadow, darkShadow,
highlight, lightHighlight);
else
BasicGraphicsUtils.drawBezel(g, x, y, width, height,
/* isPressed */ false,
/* isPefault */ focused,
shadow, darkShadow,
highlight, lightHighlight);
}
/**
* Measures the width of this border.
*
* @param c the component whose border is to be measured.
*
* @return an Insets object whose <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @see #getBorderInsets(java.awt.Component, java.awt.Insets)
*/
public Insets getBorderInsets(Component c)
{
/* There is no obvious reason for overriding this method, but we
* try to have exactly the same API as the Sun reference
* implementation.
*/
return getBorderInsets(c, null);
}
/**
* Measures the width of this border, storing the results into a
* pre-existing Insets object.
*
* @param insets an Insets object for holding the result values.
* After invoking this method, the <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @return the same object that was passed for <code>insets</code>.
*
* @see #getBorderInsets()
*/
public Insets getBorderInsets(Component c, Insets insets)
{
/* The exact amount has been determined using a test program
* that was run on the Apple/Sun JDK 1.3.1 on MacOS X, and the
* Sun JDK 1.4.1_01 on GNU/Linux for x86. Both gave [2,2,2,2].
*/
if (insets == null)
return new Insets(2, 2, 2, 2);
insets.left = insets.right = insets.top = insets.bottom = 2;
return insets;
}
}
/**
* A one-pixel thick border for rollover buttons, for example in
* tool bars.
*
* @since 1.4
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public static class RolloverButtonBorder
extends ButtonBorder
{
/**
* Determined using the <code>serialver</code> tool
* of Sun JDK 1.4.1_01 on GNU/Linux 2.4.20 for x86.
*/
static final long serialVersionUID = 1976364864896996846L;
/**
* Constructs a new border for drawing a roll-over button
* in the Basic look and feel.
*
* @param shadow the shadow color.
* @param darkShadow a darker variant of the shadow color.
* @param highlight the highlight color.
* @param lightHighlight a brighter variant of the highlight color.
*/
public RolloverButtonBorder(Color shadow, Color darkShadow,
Color highlight, Color lightHighlight)
{
super(shadow, darkShadow, highlight, lightHighlight);
}
/**
* Paints the border around a rollover button. If <code>c</code>
* is not an {@link javax.swing.AbstractButton} whose model
* returns <code>true</code> for {@link
* javax.swing.ButtonModel#isRollver}, nothing gets painted at
* all.
*
* @param c the button whose border is to be painted.
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*/
public void paintBorder(Component c, Graphics g,
int x, int y, int width, int height)
{
ButtonModel bmodel = null;
boolean drawPressed;
Color oldColor = g.getColor();
int x2, y2;
if (c instanceof AbstractButton)
bmodel = ((AbstractButton) c).getModel();
/* Draw nothing if c is not a rollover button. */
if ((bmodel == null) || !bmodel.isRollover())
return;
/* Draw nothing if the mouse is pressed, but outside the button. */
if (bmodel.isPressed() && !bmodel.isArmed())
return;
drawPressed = bmodel.isSelected() || bmodel.isPressed();
x2 = x + width - 1;
y2 = y + height - 1;
try
{
g.setColor(drawPressed ? shadow : lightHighlight);
g.drawLine(x, y, x2 - 1, y); // top edge
g.drawLine(x, y + 1, x, y2 - 1); // left edge
g.setColor(drawPressed ? lightHighlight : shadow);
g.drawLine(x, y2, x2, y2); // bottom edge
g.drawLine(x2, y, x2, y2 - 1); // right edge
}
finally
{
g.setColor(oldColor);
}
}
}
/**
* A border for JSplitPanes in the Basic look and feel. The divider
* in the middle of the JSplitPane has its own border class, of which
* an instance can be obtained with {@link #getSplitPaneDividerBorder()}.
*
* <p><img src="doc-files/BasicBorders.SplitPaneBorder-1.png" width="520"
* height="200" alt="[A screen shot for JSplitPane.HORIZONTAL_SPLIT]" />
*
* <p><img src="doc-files/BasicBorders.SplitPaneBorder-2.png" width="520"
* height="200" alt="[A screen shot for JSplitPane.VERTICAL_SPLIT]" />
*
* <p>In contrast to the other borders of the Basic look and feel,
* this class is not serializable. While this might be unintended,
* GNU Classpath follows the specification in order to be fully
* compatible with the Sun reference implementation.
*
* <p>In the Sun JDK, the bottom edge of the divider also gets
* painted if the orientation of the enclosed JSplitPane is
* <code>JSplitPane.VERTICAL_SPLIT</code> (at least in versions
* 1.3.1 and 1.4.1). GNU Classpath does not replicate this bug. A
* report has been filed with Sun (bug ID 4885629).
*
* <p>Note that the bottom left pixel of the border has a different
* color depending on the orientation of the enclosed JSplitPane.
* Although this is visually inconsistent, Classpath replicates the
* appearance of the Sun reference implementation. A bug report has
* been filed with Sun (review ID 188774).
*
* @see {@link #getSplitPaneBorder()}
* @see {@link #getSplitPaneDividerBorder()}
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public static class SplitPaneBorder
implements Border, UIResource
{
/**
* Indicates that the top edge shall be not be painted
* by {@link #paintRect(java.awt.Graphics, int, int, int, int, int)}.
*/
private static final int SUPPRESS_TOP = 1;
/**
* Indicates that the left edge shall be not be painted
* by {@link #paintRect(java.awt.Graphics, int, int, int, int, int)}.
*/
private static final int SUPPRESS_LEFT = 2;
/**
* Indicates that the bottom edge shall be not be painted
* by {@link #paintRect(java.awt.Graphics, int, int, int, int, int)}.
*/
private static final int SUPPRESS_BOTTOM = 4;
/**
* Indicates that the right edge shall be not be painted
* by {@link #paintRect(java.awt.Graphics, int, int, int, int, int)}.
*/
private static final int SUPPRESS_RIGHT = 8;
/**
* The color for drawing the bottom and right edges of the border.
*/
protected Color highlight;
/**
* The color for drawing the top and left edges of the border.
*/
protected Color shadow;
/**
* Constructs a new border for drawing a JSplitPane in the Basic
* look and feel. The divider in the middle of the JSplitPane has
* its own border class, <code>SplitPaneDividerBorder</code>.
*
* @param shadow the shadow color.
* @param highlight the highlight color.
*/
public SplitPaneBorder(Color highlight, Color shadow)
{
/* These colors usually come from the UIDefaults of the current
* look and feel. Use fallback values if the colors are not
* supplied. The API specification is silent about what
* behavior is expected for null colors, so users should not
* rely on this fallback (which is why it is not documented in
* the above Javadoc).
*/
this.shadow = (shadow != null) ? shadow : Color.black;
this.highlight = (highlight != null) ? highlight : Color.white;
}
/**
* Paints the border around a <code>JSplitPane</code>.
*
* <p><img src="doc-files/BasicBorders.SplitPaneBorder-1.png" width="520"
* height="200" alt="[A screen shot for JSplitPane.HORIZONTAL_SPLIT]" />
*
* <p><img src="doc-files/BasicBorders.SplitPaneBorder-2.png" width="520"
* height="200" alt="[A screen shot for JSplitPane.VERTICAL_SPLIT]" />
*
* @param c the <code>JSplitPane</code> whose border is to be painted.
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*/
public void paintBorder(Component c, Graphics g,
int x, int y, int width, int height)
{
JSplitPane splitPane;
Component content;
if (!(c instanceof JSplitPane))
return;
splitPane = (JSplitPane) c;
switch (splitPane.getOrientation())
{
case JSplitPane.HORIZONTAL_SPLIT:
if ((content = splitPane.getLeftComponent()) != null)
paintRect(g, SUPPRESS_RIGHT, true, x, y, content.getBounds());
if ((content = splitPane.getRightComponent()) != null)
paintRect(g, SUPPRESS_LEFT, true, x, y, content.getBounds());
break;
case JSplitPane.VERTICAL_SPLIT:
if ((content = splitPane.getTopComponent()) != null)
paintRect(g, SUPPRESS_BOTTOM, false, x, y, content.getBounds());
if ((content = splitPane.getBottomComponent()) != null)
paintRect(g, SUPPRESS_TOP, false, x, y, content.getBounds());
break;
}
}
/**
* Paints a border around a child of a <code>JSplitPane</code>,
* omitting some of the edges.
*
* @param g the graphics for painting.
*
* @param suppress a bit mask indicating the set of suppressed
* edges, for example <code>SUPPRESS_TOP | SUPPRESS_RIGHT</code>.
*
* @param x the x coordinate of the SplitPaneBorder.
*
* @param y the y coordinate of the SplitPaneBorder.
*
* @param shadeBottomLeftPixel <code>true</code> to paint the
* bottom left pixel in the shadow color,
* <code>false</code> for the highlight color. The Basic
* look and feel uses the highlight color for the bottom
* left pixel of the border of a JSplitPane whose
* orientation is VERTICAL_SPLIT, and the shadow color
* otherwise. While this might be a strange distinction,
* Classpath tries to look identical to the reference
* implementation. A bug report has been filed with Sun;
* its review ID is 188774. We currently replicate the
* Sun behavior.
*
* @param rect the bounds of the child of JSplitPane whose
* border is to be painted.
*/
private void paintRect(Graphics g, int suppress,
boolean shadeBottomLeftPixel,
int x, int y,
Rectangle rect)
{
if (rect == null)
return;
/* On each edge, the border exceeds the enclosed child by one
* pixel. See the image "BasicBorders.SplitPaneBorder-1.png" in
* the directory "doc-files".
*/
x += rect.x - 1;
y += rect.y - 1;
int right = x + rect.width + 1;
int bottom = y + rect.height + 1;
Color oldColor = g.getColor();
try
{
g.setColor(shadow);
if ((suppress & SUPPRESS_TOP) == 0)
g.drawLine(x, y, right, y);
if ((suppress & SUPPRESS_LEFT) == 0)
g.drawLine(x, y, x, bottom);
else
g.drawLine(x, bottom, x, bottom); // one pixel
g.setColor(highlight);
if ((suppress & SUPPRESS_BOTTOM) == 0)
g.drawLine(x + (shadeBottomLeftPixel ? 1 : 0), bottom, right, bottom);
else if (!shadeBottomLeftPixel)
g.drawLine(x, bottom, x, bottom); // one pixel
if ((suppress & SUPPRESS_RIGHT) == 0)
g.drawLine(right, y, right, bottom);
}
finally
{
g.setColor(oldColor);
}
}
/**
* Measures the width of this border.
*
* @param c the component whose border is to be measured, usually
* an instance of {@link javax.swing.JSplitPane}.
*
* @return an Insets object whose <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*/
public Insets getBorderInsets(Component c)
{
return new Insets(1, 1, 1, 1);
}
/**
* Determines whether this border fills every pixel in its area
* when painting.
*
* @return <code>false</code> because this border does not
* paint over the pixels where the divider joins
* the border.
*/
public boolean isBorderOpaque()
{
/* Strangely, the Sun implementation (tested with JDK 1.3.1 and
* 1.4.1_01) seems to always return true. It could be a bug,
* but without knowing the details of their implementation, it is
* hard to decide.
*/
return false;
}
}
/**
* A border for the divider inside a JSplitPane.
*
* <p><img src="doc-files/BasicBorders.SplitPaneDividerBorder-1.png"
* width="520" height="200" alt="[A screen shot of this border]" />
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
private static class SplitPaneDividerBorder
implements Border, UIResource, Serializable
{
/**
* The highlight color, which is drawn on the left or top edge
* depending on the orientation of the JSplitPanel.
*/
protected Color highlight;
/**
* The highlight color, which is drawn on the right or bottom edge
* depending on the orientation of the JSplitPanel.
*/
protected Color shadow;
/**
* Constructs a new border for drawing the divider of a JSplitPane
* in the Basic look and feel. The outer parts of the JSplitPane have
* their own border class, <code>SplitPaneBorder</code>.
*
* @param shadow the shadow color.
* @param highlight the highlight color.
*/
public SplitPaneDividerBorder(Color highlight, Color shadow)
{
this.highlight = (highlight != null) ? highlight : Color.white;
this.shadow = (shadow != null) ? shadow : Color.black;
}
/**
* Paints the border around the divider of a <code>JSplitPane</code>.
*
* <p><img src="doc-files/BasicBorders.SplitPaneDividerBorder-1.png"
* width="520" height="200" alt="[A picture that shows which pixels
* get painted in what color]" />
*
* @param c the <code>JSplitPane</code> whose divider’s border
* is to be painted.
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*/
public void paintBorder(Component c, Graphics g,
int x, int y, int width, int height)
{
Color oldColor, dcol;
int x2, y2;
JSplitPane sp;
sp = getSplitPane(c);
if (sp == null)
return;
x2 = x + width - 1;
y2 = y + height - 1;
oldColor = g.getColor();
dcol = c.getBackground();
try
{
switch (sp.getOrientation())
{
case JSplitPane.HORIZONTAL_SPLIT:
g.setColor(dcol);
g.drawLine(x + 1, y, x2 - 1, y);
g.drawLine(x + 1, y2, x2 - 1, y2);
g.setColor(sp.getLeftComponent() != null ? highlight : dcol);
g.drawLine(x, y, x, y2);
g.setColor(sp.getRightComponent() != null ? shadow : dcol);
g.drawLine(x2, y, x2, y2);
break;
case JSplitPane.VERTICAL_SPLIT:
g.setColor(dcol);
g.drawLine(x, y + 1, x, y2 - 1);
g.drawLine(x2, y + 1, x2, y2 - 1);
g.setColor(sp.getTopComponent() != null ? highlight : dcol);
g.drawLine(x, y, x2, y);
g.setColor(sp.getBottomComponent() != null ? shadow : dcol);
g.drawLine(x, y2, x2, y2);
break;
}
}
finally
{
g.setColor(oldColor);
}
}
/**
* Measures the width of this border.
*
* @param c the component whose border is to be measured, usually
* an instance of {@link javax.swing.JSplitPane}.
*
* @return an Insets object whose <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*/
public Insets getBorderInsets(Component c)
{
return new Insets(1, 1, 1, 1);
}
/**
* Determines whether this border fills every pixel in its area
* when painting.
*
* @return <code>true</code> if both highlight and shadow
* color are fully opaque.
*/
public boolean isBorderOpaque()
{
return (highlight.getAlpha() == 255) && (shadow.getAlpha() == 255);
}
/**
* Determines the JSplitPane whose divider is being painted.
*
* @param c an instance of BasicSplitPaneDivider.
*
* @return a <code>JSplitPane</code>, or <code>null</code> if
* <code>c</code> is not an instance of {@link
* javax.swing.plaf.basic.BasicSplitPaneDivider}.
*/
private JSplitPane getSplitPane(Component c)
{
if (c instanceof BasicSplitPaneDivider)
return (((BasicSplitPaneDivider) c).getBasicSplitPaneUI())
.getSplitPane();
else
return null;
}
}
/**
* A border for toggle buttons in the Basic look and feel.
*
* <p><img src="doc-files/BasicBorders.ToggleButtonBorder-1.png"
* width="270" height="135" alt="[A screen shot of this border]" />
*
* <p>The Sun implementation always seems to draw exactly
* the same border, irrespective of the state of the button.
* This is rather surprising, but GNU Classpath emulates the
* observable behavior.
*
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public static class ToggleButtonBorder
extends ButtonBorder
{
/**
* Determined using the <code>serialver</code> tool
* of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.
*/
static final long serialVersionUID = -3528666548001058394L;
/**
* Constructs a new border for drawing a JToggleButton in
* the Basic look and feel.
*
* @param shadow the shadow color.
* @param darkShadow a darker variant of the shadow color.
* @param highlight the highlight color.
* @param lightHighlight a brighter variant of the highlight color.
*/
public ToggleButtonBorder(Color shadow, Color darkShadow,
Color highlight, Color lightHighlight)
{
/* The superclass ButtonBorder substitutes null arguments
* with fallback colors.
*/
super(shadow, darkShadow, highlight, lightHighlight);
}
/**
* Paints the ToggleButtonBorder around a given component.
*
* <p>The Sun implementation always seems to draw exactly
* the same border, irrespective of the state of the button.
* This is rather surprising, but GNU Classpath emulates the
* observable behavior.
*
* @param c the component whose border is to be painted.
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*
* @see javax.swing.plaf.basic.BasicGraphicsUtils#drawBezel
*/
public void paintBorder(Component c, Graphics g,
int x, int y, int width, int height)
{
/* The author of this code tried various variants for setting
* the state of the enclosed JToggleButton, but it seems that
* the drawn border is always identical. Weird, because this
* means that the user does not see whether the JToggleButton
* is selected or not.
*/
BasicGraphicsUtils.drawBezel(g, x, y, width, height,
/* pressed */ false,
/* default */ false,
shadow, darkShadow,
highlight, lightHighlight);
}
/**
* Measures the width of this border.
*
* @param c the component whose border is to be measured.
*
* @return an Insets object whose <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @see #getBorderInsets(java.awt.Component, java.awt.Insets)
*/
public Insets getBorderInsets(Component c)
{
/* There is no obvious reason for overriding this method, but we
* try to have exactly the same API as the Sun reference
* implementation.
*/
return getBorderInsets(c, null);
}
/**
* Measures the width of this border, storing the results into a
* pre-existing Insets object.
*
* @param insets an Insets object for holding the result values.
* After invoking this method, the <code>left</code>,
* <code>right</code>, <code>top</code> and
* <code>bottom</code> fields indicate the width of the
* border at the respective edge.
*
* @return the same object that was passed for <code>insets</code>.
*
* @see #getBorderInsets()
*/
public Insets getBorderInsets(Component c, Insets insets)
{
/* The exact amount has been determined using a test program
* that was run on the Apple/Sun JDK 1.3.1 on MacOS X, and the
* Sun JDK 1.4.1_01 on GNU/Linux for x86. Both gave [2,2,2,2].
*/
if (insets == null)
return new Insets(2, 2, 2, 2);
insets.left = insets.right = insets.top = insets.bottom = 2;
return insets;
}
}
}