- java.lang.Object
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- javax.swing.plaf.ComponentUI
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- javax.swing.plaf.LabelUI
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- javax.swing.plaf.basic.BasicLabelUI
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- All Implemented Interfaces:
PropertyChangeListener,EventListener
- Direct Known Subclasses:
MetalLabelUI,SynthLabelUI
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.
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Field Summary
Fields Modifier and Type Field Description protected static BasicLabelUIlabelUIThe defaultBasicLabelUIinstance.
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Constructor Summary
Constructors Constructor Description BasicLabelUI()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static ComponentUIcreateUI(JComponent c)Returns an instance ofBasicLabelUI.intgetBaseline(JComponent c, int width, int height)Returns the baseline.Component.BaselineResizeBehaviorgetBaselineResizeBehavior(JComponent c)Returns an enum indicating how the baseline of the component changes as the size changes.DimensiongetMaximumSize(JComponent c)Returns the specified component's maximum size appropriate for the look and feel.DimensiongetMinimumSize(JComponent c)Returns the specified component's minimum size appropriate for the look and feel.protected voidinstallComponents(JLabel c)Registers components.protected voidinstallDefaults(JLabel c)Installs default properties.protected voidinstallKeyboardActions(JLabel l)Registers keyboard actions.protected voidinstallListeners(JLabel c)Registers listeners.protected StringlayoutCL(JLabel label, FontMetrics fontMetrics, String text, Icon icon, Rectangle viewR, Rectangle iconR, Rectangle textR)Forwards the call to SwingUtilities.layoutCompoundLabel().voidpaint(Graphics g, JComponent c)Paints the label text with the foreground color, if the label is opaque then paints the entire background with the background color.protected voidpaintDisabledText(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 voidpaintEnabledText(JLabel l, Graphics g, String s, int textX, int textY)Paint clippedText at textX, textY with the labels foreground color.protected voiduninstallComponents(JLabel c)Unregisters components.protected voiduninstallDefaults(JLabel c)Uninstalls default properties.protected voiduninstallKeyboardActions(JLabel c)Unregisters keyboard actions.protected voiduninstallListeners(JLabel c)Unregisters listeners.-
Methods declared in class javax.swing.plaf.ComponentUI
contains, getAccessibleChild, getAccessibleChildrenCount, getPreferredSize, installUI, uninstallUI, update
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Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods declared in interface java.beans.PropertyChangeListener
propertyChange
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Field Detail
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labelUI
protected static BasicLabelUI labelUI
The defaultBasicLabelUIinstance. This field might not be used. To change the default instance use a subclass which overrides thecreateUImethod, and place that class name in defaults table under the key "LabelUI".
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Method Detail
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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.- Parameters:
label- an instance ofJLabelfontMetrics- a font metricstext- a texticon- an iconviewR- a bounding rectangle to lay out labeliconR- a bounding rectangle to lay out icontextR- a bounding rectangle to lay out text- Returns:
- a possibly clipped version of the compound labels string
- 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)
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paintEnabledText
protected void paintEnabledText(JLabel l, Graphics g, String s, int textX, int textY)
Paint clippedText at textX, textY with the labels foreground color.- Parameters:
l- an instance ofJLabelg- an instance ofGraphicss- a texttextX- an X coordinatetextY- an Y coordinate- See Also:
paint(java.awt.Graphics, javax.swing.JComponent),paintDisabledText(javax.swing.JLabel, java.awt.Graphics, java.lang.String, int, int)
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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().- Parameters:
l- an instance ofJLabelg- an instance ofGraphicss- a texttextX- an X coordinatetextY- an Y coordinate- See Also:
paint(java.awt.Graphics, javax.swing.JComponent),paintEnabledText(javax.swing.JLabel, java.awt.Graphics, java.lang.String, int, int)
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paint
public void paint(Graphics g, JComponent c)
Paints the label text with the foreground color, if the label is opaque then paints the entire background with the background color. The Label text is drawn bypaintEnabledText(javax.swing.JLabel, java.awt.Graphics, java.lang.String, int, int)orpaintDisabledText(javax.swing.JLabel, java.awt.Graphics, java.lang.String, int, int). The locations of the label parts are computed bylayoutCL(javax.swing.JLabel, java.awt.FontMetrics, java.lang.String, javax.swing.Icon, java.awt.Rectangle, java.awt.Rectangle, java.awt.Rectangle).- Overrides:
paintin classComponentUI- Parameters:
g- theGraphicscontext in which to paintc- 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)
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getMinimumSize
public Dimension getMinimumSize(JComponent c)
Description copied from class:ComponentUIReturns the specified component's minimum size appropriate for the look and feel. Ifnullis 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 invokesgetPreferredSizeand returns that value.- Overrides:
getMinimumSizein classComponentUI- 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)
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getMaximumSize
public Dimension getMaximumSize(JComponent c)
Description copied from class:ComponentUIReturns the specified component's maximum size appropriate for the look and feel. Ifnullis 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 invokesgetPreferredSizeand returns that value.- Overrides:
getMaximumSizein classComponentUI- 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)
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getBaseline
public int getBaseline(JComponent c, int width, int height)
Returns the baseline.- Overrides:
getBaselinein classComponentUI- Parameters:
c-JComponentbaseline is being requested forwidth- the width to get the baseline forheight- the height to get the baseline for- Returns:
- baseline or a value < 0 indicating there is no reasonable baseline
- Throws:
NullPointerException- ifcisnullIllegalArgumentException- if width or height is < 0- Since:
- 1.6
- See Also:
JComponent.getBaseline(int, int)
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getBaselineResizeBehavior
public Component.BaselineResizeBehavior getBaselineResizeBehavior(JComponent c)
Returns an enum indicating how the baseline of the component changes as the size changes.- Overrides:
getBaselineResizeBehaviorin classComponentUI- Parameters:
c-JComponentto return baseline resize behavior for- Returns:
- an enum indicating how the baseline changes as the component size changes
- Throws:
NullPointerException- ifcisnull- Since:
- 1.6
- See Also:
JComponent.getBaseline(int, int)
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installDefaults
protected void installDefaults(JLabel c)
Installs default properties.- Parameters:
c- an instance ofJLabel
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installListeners
protected void installListeners(JLabel c)
Registers listeners.- Parameters:
c- an instance ofJLabel
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installComponents
protected void installComponents(JLabel c)
Registers components.- Parameters:
c- an instance ofJLabel
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installKeyboardActions
protected void installKeyboardActions(JLabel l)
Registers keyboard actions.- Parameters:
l- an instance ofJLabel
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uninstallDefaults
protected void uninstallDefaults(JLabel c)
Uninstalls default properties.- Parameters:
c- an instance ofJLabel
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uninstallListeners
protected void uninstallListeners(JLabel c)
Unregisters listeners.- Parameters:
c- an instance ofJLabel
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uninstallComponents
protected void uninstallComponents(JLabel c)
Unregisters components.- Parameters:
c- an instance ofJLabel
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uninstallKeyboardActions
protected void uninstallKeyboardActions(JLabel c)
Unregisters keyboard actions.- Parameters:
c- an instance ofJLabel
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createUI
public static ComponentUI createUI(JComponent c)
Returns an instance ofBasicLabelUI.- Parameters:
c- a component- Returns:
- an instance of
BasicLabelUI
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