- java.lang.Object
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- javax.swing.plaf.ComponentUI
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- javax.swing.plaf.ScrollBarUI
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- javax.swing.plaf.basic.BasicScrollBarUI
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- javax.swing.plaf.synth.SynthScrollBarUI
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- All Implemented Interfaces:
- LayoutManager, PropertyChangeListener, EventListener, SynthConstants, SynthUI, SwingConstants
public class SynthScrollBarUI extends BasicScrollBarUI implements PropertyChangeListener, SynthUI
Provides the Synth L&F UI delegate forJScrollBar
.- Since:
- 1.7
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Nested Class Summary
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Nested classes/interfaces inherited from class javax.swing.plaf.basic.BasicScrollBarUI
BasicScrollBarUI.ArrowButtonListener, BasicScrollBarUI.ModelListener, BasicScrollBarUI.PropertyChangeHandler, BasicScrollBarUI.ScrollListener, BasicScrollBarUI.TrackListener
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Field Summary
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Fields inherited from class javax.swing.plaf.basic.BasicScrollBarUI
buttonListener, decrButton, DECREASE_HIGHLIGHT, decrGap, incrButton, INCREASE_HIGHLIGHT, incrGap, isDragging, maximumThumbSize, minimumThumbSize, modelListener, NO_HIGHLIGHT, propertyChangeListener, scrollbar, scrollBarWidth, scrollListener, scrollTimer, thumbColor, thumbDarkShadowColor, thumbHighlightColor, thumbLightShadowColor, thumbRect, trackColor, trackHighlight, trackHighlightColor, trackListener, trackRect
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Fields inherited from interface javax.swing.plaf.synth.SynthConstants
DEFAULT, DISABLED, ENABLED, FOCUSED, MOUSE_OVER, PRESSED, SELECTED
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Fields inherited from interface javax.swing.SwingConstants
BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST
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Constructor Summary
Constructors Constructor and Description SynthScrollBarUI()
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Method Summary
Methods Modifier and Type Method and Description protected void
configureScrollBarColors()
protected JButton
createDecreaseButton(int orientation)
protected JButton
createIncreaseButton(int orientation)
static ComponentUI
createUI(JComponent c)
SynthContext
getContext(JComponent c)
Returns the Context for the specified component.protected Dimension
getMinimumThumbSize()
Returns the smallest acceptable size for the thumb.Dimension
getPreferredSize(JComponent c)
A vertical scrollbar's preferred width is the maximum of preferred widths of the (nonnull
) increment/decrement buttons, and the minimum width of the thumb.boolean
getSupportsAbsolutePositioning()
Indicates whether the user can absolutely position the thumb with a mouse gesture (usually the middle mouse button).protected void
installDefaults()
protected void
installListeners()
void
paint(Graphics g, JComponent c)
Paints the specified component according to the Look and Feel.protected void
paint(SynthContext context, Graphics g)
Paints the specified component.void
paintBorder(SynthContext context, Graphics g, int x, int y, int w, int h)
Paints the border.protected void
paintThumb(SynthContext context, Graphics g, Rectangle thumbBounds)
Paints the scrollbar thumb.protected void
paintTrack(SynthContext context, Graphics g, Rectangle trackBounds)
Paints the scrollbar track.void
propertyChange(PropertyChangeEvent e)
This method gets called when a bound property is changed.protected void
setThumbRollover(boolean active)
Sets whether or not the mouse is currently over the thumb.protected void
uninstallDefaults()
protected void
uninstallListeners()
void
update(Graphics g, JComponent c)
Notifies this UI delegate to repaint the specified component.-
Methods inherited from class javax.swing.plaf.basic.BasicScrollBarUI
addLayoutComponent, createArrowButtonListener, createModelListener, createPropertyChangeListener, createScrollListener, createTrackListener, getMaximumSize, getMaximumThumbSize, getThumbBounds, getTrackBounds, installComponents, installKeyboardActions, installUI, isThumbRollover, layoutContainer, layoutHScrollbar, layoutVScrollbar, minimumLayoutSize, paintDecreaseHighlight, paintIncreaseHighlight, paintThumb, paintTrack, preferredLayoutSize, removeLayoutComponent, scrollByBlock, scrollByUnit, setThumbBounds, uninstallComponents, uninstallKeyboardActions, uninstallUI
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Methods inherited from class javax.swing.plaf.ComponentUI
contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMinimumSize
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Method Detail
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createUI
public static ComponentUI createUI(JComponent c)
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installDefaults
protected void installDefaults()
- Overrides:
installDefaults
in classBasicScrollBarUI
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configureScrollBarColors
protected void configureScrollBarColors()
- Overrides:
configureScrollBarColors
in classBasicScrollBarUI
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installListeners
protected void installListeners()
- Overrides:
installListeners
in classBasicScrollBarUI
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uninstallListeners
protected void uninstallListeners()
- Overrides:
uninstallListeners
in classBasicScrollBarUI
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uninstallDefaults
protected void uninstallDefaults()
- Overrides:
uninstallDefaults
in classBasicScrollBarUI
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getContext
public SynthContext getContext(JComponent c)
Description copied from interface:SynthUI
Returns the Context for the specified component.- Specified by:
getContext
in interfaceSynthUI
- Parameters:
c
- Component requesting SynthContext.- Returns:
- SynthContext describing component.
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getSupportsAbsolutePositioning
public boolean getSupportsAbsolutePositioning()
Description copied from class:BasicScrollBarUI
Indicates whether the user can absolutely position the thumb with a mouse gesture (usually the middle mouse button).- Overrides:
getSupportsAbsolutePositioning
in classBasicScrollBarUI
- Returns:
- true if a mouse gesture can absolutely position the thumb
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update
public void update(Graphics g, JComponent c)
Notifies this UI delegate to repaint the specified component. This method paints the component background, then calls thepaint(SynthContext,Graphics)
method.In general, this method does not need to be overridden by subclasses. All Look and Feel rendering code should reside in the
paint
method.- Overrides:
update
in classComponentUI
- Parameters:
g
- theGraphics
object used for paintingc
- the component being painted- See Also:
paint(SynthContext,Graphics)
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paint
public void paint(Graphics g, JComponent c)
Paints the specified component according to the Look and Feel.This method is not used by Synth Look and Feel. Painting is handled by the
paint(SynthContext,Graphics)
method.- Overrides:
paint
in classBasicScrollBarUI
- Parameters:
g
- theGraphics
object used for paintingc
- the component being painted- See Also:
paint(SynthContext,Graphics)
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paint
protected void paint(SynthContext context, Graphics g)
Paints the specified component.- Parameters:
context
- context for the component being paintedg
- theGraphics
object used for painting- See Also:
update(Graphics,JComponent)
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paintBorder
public void paintBorder(SynthContext context, Graphics g, int x, int y, int w, int h)
Description copied from interface:SynthUI
Paints the border.- Specified by:
paintBorder
in interfaceSynthUI
- Parameters:
context
- a component contextg
-Graphics
to paint onx
- the X coordinatey
- the Y coordinatew
- width of the borderh
- height of the border
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paintTrack
protected void paintTrack(SynthContext context, Graphics g, Rectangle trackBounds)
Paints the scrollbar track.- Parameters:
context
- context for the component being paintedg
-Graphics
object used for paintingtrackBounds
- bounding box for the track
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paintThumb
protected void paintThumb(SynthContext context, Graphics g, Rectangle thumbBounds)
Paints the scrollbar thumb.- Parameters:
context
- context for the component being paintedg
-Graphics
object used for paintingthumbBounds
- bounding box for the thumb
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getPreferredSize
public Dimension getPreferredSize(JComponent c)
A vertical scrollbar's preferred width is the maximum of preferred widths of the (nonnull
) increment/decrement buttons, and the minimum width of the thumb. The preferred height is the sum of the preferred heights of the same parts. The basis for the preferred size of a horizontal scrollbar is similar.The
preferredSize
is only computed once, subsequent calls to this method just return a cached size.- Overrides:
getPreferredSize
in classBasicScrollBarUI
- Parameters:
c
- theJScrollBar
that's delegating this method to us- Returns:
- the preferred size of a Basic JScrollBar
- See Also:
BasicScrollBarUI.getMaximumSize(javax.swing.JComponent)
,ComponentUI.getMinimumSize(javax.swing.JComponent)
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getMinimumThumbSize
protected Dimension getMinimumThumbSize()
Description copied from class:BasicScrollBarUI
Returns the smallest acceptable size for the thumb. If the scrollbar becomes so small that this size isn't available, the thumb will be hidden.Warning : the value returned by this method should not be be modified, it's a shared static constant.
- Overrides:
getMinimumThumbSize
in classBasicScrollBarUI
- Returns:
- The smallest acceptable size for the thumb.
- See Also:
BasicScrollBarUI.getMaximumThumbSize()
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createDecreaseButton
protected JButton createDecreaseButton(int orientation)
- Overrides:
createDecreaseButton
in classBasicScrollBarUI
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createIncreaseButton
protected JButton createIncreaseButton(int orientation)
- Overrides:
createIncreaseButton
in classBasicScrollBarUI
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setThumbRollover
protected void setThumbRollover(boolean active)
Description copied from class:BasicScrollBarUI
Sets whether or not the mouse is currently over the thumb.- Overrides:
setThumbRollover
in classBasicScrollBarUI
- Parameters:
active
- True indicates the thumb is currently active.
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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 interfacePropertyChangeListener
- Parameters:
e
- A PropertyChangeEvent object describing the event source and the property that has changed.
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Vielen Dank im Voraus.
Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-javax/swing/plaf/synth/synthscrollbarui.html
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