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javax.swing.plaf.basic
Class BasicLabelUI
java.lang.Object
javax.swing.plaf.ComponentUI
javax.swing.plaf.LabelUI
javax.swing.plaf.basic.BasicLabelUI
-
All Implemented Interfaces:
-
PropertyChangeListener
,
EventListener
-
Direct Known Subclasses:
-
MetalLabelUI
-
public class BasicLabelUI
- extends LabelUI
- implements PropertyChangeListener
A Windows L&F implementation of LabelUI. This implementation is completely static, i.e. there's only one UIView implementation that's shared by all JLabel objects.
Method Summary
|
static
ComponentUI
|
createUI
(
JComponent
c)
|
int
|
getBaseline
(
JComponent
Returns the baseline.
|
Component.BaselineResizeBehavior
|
getBaselineResizeBehavior
(
JComponent
Returns an enum indicating how the baseline of the component changes as the size changes.
|
Dimension
|
getMaximumSize
(
JComponent
c)
Returns the specified component's maximum size appropriate for the look and feel. |
Dimension
|
getMinimumSize
(
JComponent
c)
Returns the specified component's minimum size appropriate for the look and feel. |
Dimension
|
getPreferredSize
(
JComponent
c)
Returns the specified component's preferred size appropriate for the look and feel. |
protected void |
installComponents
(
JLabel
c)
|
protected void |
installDefaults
(
JLabel
c)
|
protected void |
installKeyboardActions
(
JLabel
l)
|
protected void |
installListeners
(
JLabel
c)
|
void |
installUI
(
JComponent
c)
Configures the specified component appropriate for the look and feel. |
protected
String
|
layoutCL
(
JLabel
label,
FontMetrics
fontMetrics,
String
text,
Icon
icon,
Rectangle
viewR,
Rectangle
iconR,
Rectangle
textR)
Forwards the call to SwingUtilities.layoutCompoundLabel(). |
void |
paint
(
Graphics
g,
JComponent
c)
Paint the label text in the foreground color, if the label is opaque then paint the entire background with the background color. |
protected void |
paintDisabledText
(
JLabel
l,
Graphics
g,
String
s, int textX, int textY)
Paint clippedText at textX, textY with background.lighter() and then shifted down and to the right by one pixel with background.darker(). |
protected void |
paintEnabledText
(
JLabel
l,
Graphics
g,
String
s, int textX, int textY)
Paint clippedText at textX, textY with the labels foreground color. |
void |
propertyChange
(
PropertyChangeEvent
e)
This method gets called when a bound property is changed. |
protected void |
uninstallComponents
(
JLabel
c)
|
protected void |
uninstallDefaults
(
JLabel
c)
|
protected void |
uninstallKeyboardActions
(
JLabel
c)
|
protected void |
uninstallListeners
(
JLabel
c)
|
void |
uninstallUI
(
JComponent
c)
Reverses configuration which was done on the specified component during installUI. |
Methods inherited from class java.lang.
Object
|
clone
,
equals
,
finalize
,
getClass
,
hashCode
,
notify
,
notifyAll
,
toString
,
wait
,
wait
,
wait
|
labelUI
protected static BasicLabelUI labelUI
BasicLabelUI
public BasicLabelUI()
layoutCL
protected String layoutCL(JLabel label,
FontMetrics fontMetrics,
String text,
Icon icon,
Rectangle viewR,
Rectangle iconR,
Rectangle textR)
-
Forwards the call to SwingUtilities.layoutCompoundLabel(). This method is here so that a subclass could do Label specific layout and to shorten the method name a little.
-
-
-
See Also:
-
SwingUtilities.layoutCompoundLabel(javax.swing.JComponent, java.awt.FontMetrics, java.lang.String, javax.swing.Icon, int, int, int, int, java.awt.Rectangle, java.awt.Rectangle, java.awt.Rectangle, int)
paintEnabledText
protected void paintEnabledText(JLabel l,
Graphics g,
String s,
int textX,
int textY)
-
Paint clippedText at textX, textY with the labels foreground color.
-
-
-
See Also:
-
paint(java.awt.Graphics, javax.swing.JComponent)
,
paintDisabledText(javax.swing.JLabel, java.awt.Graphics, java.lang.String, int, int)
paintDisabledText
protected void paintDisabledText(JLabel l,
Graphics g,
String s,
int textX,
int textY)
-
Paint clippedText at textX, textY with background.lighter() and then shifted down and to the right by one pixel with background.darker().
-
-
-
See Also:
-
paint(java.awt.Graphics, javax.swing.JComponent)
,
paintEnabledText(javax.swing.JLabel, java.awt.Graphics, java.lang.String, int, int)
paint
public void paint(Graphics g,
JComponent c)
-
Paint the label text in the foreground color, if the label is opaque then paint the entire background with the background color. The Label text is drawn by paintEnabledText() or paintDisabledText(). The locations of the label parts are computed by layoutCL.
-
-
Overrides:
-
paint
in class
ComponentUI
-
-
Parameters:
-
g - the Graphics context in which to paint
-
c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
-
See Also:
-
paintEnabledText(javax.swing.JLabel, java.awt.Graphics, java.lang.String, int, int)
,
paintDisabledText(javax.swing.JLabel, java.awt.Graphics, java.lang.String, int, int)
,
layoutCL(javax.swing.JLabel, java.awt.FontMetrics, java.lang.String, javax.swing.Icon, java.awt.Rectangle, java.awt.Rectangle, java.awt.Rectangle)
getPreferredSize
public Dimension getPreferredSize(JComponent c)
-
Description copied from class:
ComponentUI
-
Returns the specified component's preferred size appropriate for the look and feel. If null is returned, the preferred size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method returns null.
-
-
Overrides:
-
getPreferredSize
in class
ComponentUI
-
-
Parameters:
-
c - the component whose preferred size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
-
See Also:
-
JComponent.getPreferredSize()
,
LayoutManager.preferredLayoutSize(java.awt.Container)
getMinimumSize
public Dimension getMinimumSize(JComponent c)
-
Description copied from class:
ComponentUI
-
Returns the specified component's minimum size appropriate for the look and feel. If null is returned, the minimum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.
-
-
Overrides:
-
getMinimumSize
in class
ComponentUI
-
-
Parameters:
-
c - the component whose minimum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
-
Returns:
-
getPreferredSize(c)
-
See Also:
-
JComponent.getMinimumSize()
,
LayoutManager.minimumLayoutSize(java.awt.Container)
,
ComponentUI.getPreferredSize(javax.swing.JComponent)
getMaximumSize
public Dimension getMaximumSize(JComponent c)
-
Description copied from class:
ComponentUI
-
Returns the specified component's maximum size appropriate for the look and feel. If null is returned, the maximum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.
-
-
Overrides:
-
getMaximumSize
in class
ComponentUI
-
-
Parameters:
-
c - the component whose maximum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
-
Returns:
-
getPreferredSize(c)
-
See Also:
-
JComponent.getMaximumSize()
,
LayoutManager2.maximumLayoutSize(java.awt.Container)
getBaseline
public int
getBaseline
(
JComponent
c,
int width,
int height)
-
Returns the baseline.
-
-
Overrides:
-
getBaseline
in class
ComponentUI
-
-
Parameters:
-
c - JComponent baseline is being requested for
-
width - the width to get the baseline for
-
height - the height to get the baseline for
-
Returns:
-
baseline or a value < 0 indicating there is no reasonable baseline
-
Throws:
-
NullPointerException
- if c is null
-
IllegalArgumentException
- if width or height is < 0
-
Since:
-
1.6
-
See Also:
-
JComponent.getBaseline(int, int)
getBaselineResizeBehavior
public
Component.BaselineResizeBehavior
getBaselineResizeBehavior
(
JComponent
c)
-
Returns an enum indicating how the baseline of the component changes as the size changes.
-
-
Overrides:
-
getBaselineResizeBehavior
in class
ComponentUI
-
-
Parameters:
-
c - JComponent to return baseline resize behavior for
-
Returns:
-
an enum indicating how the baseline changes as the component size changes
-
Throws:
-
NullPointerException
- if c is null
-
Since:
-
1.6
-
See Also:
-
JComponent.getBaseline(int, int)
installUI
public void installUI(JComponent c)
-
Description copied from class:
ComponentUI
-
Configures the specified component appropriate for the look and feel. This method is invoked when the ComponentUI instance is being installed as the UI delegate on the specified component. This method should completely configure the component for the look and feel, including the following:
-
Install any default property values for color, fonts, borders, icons, opacity, etc. on the component. Whenever possible, property values initialized by the client program should
not
be overridden.
-
Install a LayoutManager on the component if necessary.
-
Create/add any required sub-components to the component.
-
Create/install event listeners on the component.
-
Create/install a PropertyChangeListener on the component in order to detect and respond to component property changes appropriately.
-
Install keyboard UI (mnemonics, traversal, etc.) on the component.
-
Initialize any appropriate instance data.
-
-
Overrides:
-
installUI
in class
ComponentUI
-
-
Parameters:
-
c - the component where this UI delegate is being installed
-
See Also:
-
ComponentUI.uninstallUI(javax.swing.JComponent)
,
JComponent.setUI(javax.swing.plaf.ComponentUI)
,
JComponent.updateUI()
uninstallUI
public void uninstallUI(JComponent c)
-
Description copied from class:
ComponentUI
-
Reverses configuration which was done on the specified component during installUI. This method is invoked when this UIComponent instance is being removed as the UI delegate for the specified component. This method should undo the configuration performed in installUI, being careful to leave the JComponent instance in a clean state (no extraneous listeners, look-and-feel-specific property objects, etc.). This should include the following:
-
Remove any UI-set borders from the component.
-
Remove any UI-set layout managers on the component.
-
Remove any UI-added sub-components from the component.
-
Remove any UI-added event/property listeners from the component.
-
Remove any UI-installed keyboard UI from the component.
-
Nullify any allocated instance data objects to allow for GC.
-
-
Overrides:
-
uninstallUI
in class
ComponentUI
-
-
Parameters:
-
c - the component from which this UI delegate is being removed; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
-
See Also:
-
ComponentUI.installUI(javax.swing.JComponent)
,
JComponent.updateUI()
installDefaults
protected void installDefaults(JLabel c)
-
-
installListeners
protected void installListeners(JLabel c)
-
-
installComponents
protected void installComponents(JLabel c)
-
-
installKeyboardActions
protected void installKeyboardActions(JLabel l)
-
-
uninstallDefaults
protected void uninstallDefaults(JLabel c)
-
-
uninstallListeners
protected void uninstallListeners(JLabel c)
-
-
uninstallComponents
protected void uninstallComponents(JLabel c)
-
-
uninstallKeyboardActions
protected void uninstallKeyboardActions(JLabel c)
-
-
createUI
public static ComponentUI createUI(JComponent c)
-
-
propertyChange
public void propertyChange(PropertyChangeEvent e)
-
Description copied from interface:
PropertyChangeListener
-
This method gets called when a bound property is changed.
-
-
Specified by:
-
propertyChange
in interface
PropertyChangeListener
-
-
Parameters:
-
e - A PropertyChangeEvent object describing the event source and the property that has changed.