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Class guinea.ui.Slider

java.lang.Object
   |
   +----java.awt.Component
           |
           +----guinea.ui.Slider

public class Slider

extends Component

implements Adjustable, Serializable

See Also:

Adjustable, Scrollbar, LineScale, GradeBar

Variable Index

· adjustmentListener

List of event listeners.

· curValue

Current value.

· EVENT_WHEN_MOVED

· EVENT_WHEN_RELEASED

· eventWhenMoved

Foo

· fixedLineLength

Minimum length of slider's line (in pixels).

· knob

The polygon used to draw slider's knob.

· knobCoordsUpdated

· knobFillColor

The slider knob's fill color.

· knobSize

Size of the slider knob.

· labelFont

Font used for the labels.

· lineCoords

· lineCoordsUpdated

· lineFillColor

The slider line's fill color.

· lineYPos

The Y coordinate of the slider line from the top of the component.

· maxValue

Maximum value.

· minValue

Minimum value.

· numTicks

Number of ticks.

· pressed

· size

Size of component.

· sliderArea

· sliderOffset

Offset of the slider's line from the left and right edge of the component.

· ticks

Ticks.

· xPos

· yPos

Constructor Index

· Slider()

Method Index

· addAdjustmentListener(AdjustmentListener)

Add a listener to recieve adjustment events when the value of the adjustable object changes.

· addTick(int)

Add a tick (without a label) to the slider.

· addTick(int, String)

Add a tick and corresponding label to the slider.

· addTick(int, String, int)

Add a tick and corresponding label to the slider.

· createKnob()

· drawKnob(Graphics)

Draw slider's knob.

· drawLine()

Draw the grading line on the slider component.

· drawLine(Graphics, Dimension)

Draw the grading line on the slider component.

· eraseKnob(Graphics)

Erase slider's knob.

· getBlockIncrement()

Gets the block value increment for the adjustable object.

· getKnobSize()

· getLabelFont()

Get the font used for drawing labels.

· getMaximum()

Gets the maximum value of the adjustable object.

· getMinimum()

Gets the minimum value of the adjustable object.

· getMinimumSize()

Gets the mininimum size of this component.

· getOrientation()

Gets the orientation of the adjustable object.

· getPreferredSize()

Gets the preferred size of this component.

· getSliderOffset()

· getUnitIncrement()

Gets the unit value increment for the adjustable object.

· getValue()

Gets the current value of the adjustable object.

· getVisibleAmount()

Gets the length of the propertional indicator.

· handleMouse(MouseEvent)

· initEvents()

· invalidate()

Invalidate cached coordinates and sizes.

· invalidateTicks()

Invalidate cached coordinates and sizes calculated in the ticks.

· main(String[])

· paint(Graphics)

Paints this component.

· postEvent()

Create an adjustment event and send it to listeners.

· processAdjustmentEvent(AdjustmentEvent)

Process adjustment event (send it to listeners).

· processMouseEvent(MouseEvent)

Processes mouse events occurring on this component by dispatching them to any registered MouseListener objects.

· processMouseMotionEvent(MouseEvent)

Processes mouse motion events occurring on this component by dispatching them to any registered MouseMotionListener objects.

· recalculateKnobCoords()

· recalculateKnobCoords(int)

· recalculateLineCoords(Dimension)

· removeAdjustmentListener(AdjustmentListener)

Removes an adjustment listener.

· removeAllTicks()

Remove all ticks and labels from this slider.

· setBlockIncrement(int)

Sets the block value increment for the adjustable object.

· setBounds(int, int, int, int)

Set size and location of the component.

· setEnabled(boolean)

Enable or disable component.

· setKnobSize(int)

· setLabelFont(Font)

Set font for labels.

· setLineLength(int)

Set minimum length of slider line in pixels.

· setMaximum(int)

Sets the maximum value of the adjustable object.

· setMinimum(int)

Sets the minimum value of the adjustable object.

· setSliderOffset(int)

· setUnitIncrement(int)

Sets the unit value increment for the adjustable object.

· setValue(int)

Sets the current value of the adjustable object.

· setVisibleAmount(int)

Sets the length of the proportionl indicator of the adjustable object.

· setWhenEvent(int)

· translateCoordToValue(int)

Translate an x-coordinate (got from a mouse event, for example) to adjustable value corresponding to the coordinate.

· translateValueToCoord(int)

Translate an adjustable-value to a corresponding component's x-coordinate for drawing, for example.

Variables

 protected transient Dimension size

Size of component.

 protected int lineYPos

 protected int knobSize

 protected Polygon knob

The polygon used to draw slider's knob.

 protected int sliderOffset

 protected int fixedLineLength

 protected transient int xPos

 protected transient int yPos

 protected int minValue

 protected int maxValue

 protected transient int curValue

 protected transient boolean knobCoordsUpdated

 protected transient boolean lineCoordsUpdated

 protected transient Rectangle lineCoords

 protected Color knobFillColor

The slider knob's fill color.

 protected Color lineFillColor

The slider line's fill color.

 protected Font labelFont

Font used for the labels.

 protected transient Rectangle sliderArea

 protected Slider. Tick ticks[]

 protected int numTicks

 protected transient boolean pressed

 protected boolean eventWhenMoved

 public static final int EVENT_WHEN_MOVED

 public static final int EVENT_WHEN_RELEASED

 protected AdjustmentListener adjustmentListener

List of event listeners.

Constructors

 public Slider()

Methods

 protected Polygon createKnob()

 protected void initEvents()

 public void setWhenEvent(int type)

 public synchronized void paint(Graphics g)

Paints this component.

Overrides:

paint in class Component

 protected void recalculateLineCoords(Dimension s)

 protected void drawLine()

Draw the grading line on the slider component.

 protected void drawLine(Graphics g,
                         Dimension s)

Draw the grading line on the slider component.

 protected int translateCoordToValue(int x)

Translate an x-coordinate (got from a mouse event, for example) to adjustable value corresponding to the coordinate.

Parameters:

x - A coordinate to translate to an adjustable-value.

Returns:

An adjustable value corresponding to x-coordinate.

 protected int translateValueToCoord(int value)

Translate an adjustable-value to a corresponding component's x-coordinate for drawing, for example.

Parameters:

value - An adjustable value to translate to corresponding component coordinate.

Returns:

A x-coordinate corresponding to translated value.

 protected void recalculateKnobCoords(int value)

 protected void recalculateKnobCoords()

 protected void drawKnob(Graphics g)

Draw slider's knob.

Parameters:

g - A graphics object.

 protected void eraseKnob(Graphics g)

Erase slider's knob.

Parameters:

g - A graphics object.

 public void setEnabled(boolean enabled)

Enable or disable component.

Parameters:

enabled - Is component enabled.

Overrides:

setEnabled in class Component

 public void setSliderOffset(int offset)

 public int getSliderOffset()

 public void setKnobSize(int size)

 public int getKnobSize()

 public void setBounds(int x,
                       int y,
                       int width,
                       int height)

Set size and location of the component. Also invalidates cached position calculations in parts and ticks.

Parameters:

x - X-coordinate.

y - X-coordinate.

width - Width of component.

height - Height of component.

Overrides:

setBounds in class Component

See Also:

invalidate

 public Dimension getMinimumSize()

Gets the mininimum size of this component.

Overrides:

getMinimumSize in class Component

 public Dimension getPreferredSize()

Gets the preferred size of this component.

Overrides:

getPreferredSize in class Component

 public void setLineLength(int len)

Set minimum length of slider line in pixels.

Parameters:

len - Length of line in pixels.

 public Font getLabelFont()

Get the font used for drawing labels.

Returns:

A Java font.

 public void setLabelFont(Font font)

Set font for labels.

Parameters:

font - A font.

 public void removeAllTicks()

Remove all ticks and labels from this slider.

 public void addTick(int value,
                     String label,
                     int level)

Add a tick and corresponding label to the slider.

Parameters:

value - The slider position where to set the tick.

label - A label to be shown below the tick. If null, no label is shown, only a tick.

level - Zero is default value. Use one, two, etc. to write the label below the previous level. Usefull if many labels are used and they tend to overlap.

 public void addTick(int value,
                     String label)

Add a tick and corresponding label to the slider.

Parameters:

value - The slider position where to set the tick.

label - A label to be shown below the tick. If null, no label is shown, only a tick.

 public void addTick(int value)

Add a tick (without a label) to the slider.

Parameters:

value - The slider position where to set the tick.

 public void invalidate()

Invalidate cached coordinates and sizes. Forces recalculation of them when needed next time. Also invalidates values calculated in ticks.

Overrides:

invalidate in class Component

See Also:

invalidateTicks

 protected void invalidateTicks()

Invalidate cached coordinates and sizes calculated in the ticks. Forces recalculation of them when needed next time.

 protected void processMouseEvent(MouseEvent e)

Processes mouse events occurring on this component by dispatching them to any registered MouseListener objects.

Overrides:

processMouseEvent in class Component

 protected void processMouseMotionEvent(MouseEvent e)

Processes mouse motion events occurring on this component by dispatching them to any registered MouseMotionListener objects.

Overrides:

processMouseMotionEvent in class Component

 protected void handleMouse(MouseEvent e)

 public int getOrientation()

Gets the orientation of the adjustable object.

 public void setMinimum(int min)

Sets the minimum value of the adjustable object.

Parameters:

min - the minimum value

 public int getMinimum()

Gets the minimum value of the adjustable object.

 public void setMaximum(int max)

Sets the maximum value of the adjustable object.

Parameters:

max - the maximum value

 public int getMaximum()

Gets the maximum value of the adjustable object.

 public void setUnitIncrement(int u)

Sets the unit value increment for the adjustable object.

Parameters:

u - the unit increment

 public int getUnitIncrement()

Gets the unit value increment for the adjustable object.

 public void setBlockIncrement(int b)

Sets the block value increment for the adjustable object.

Parameters:

b - the block increment

 public int getBlockIncrement()

Gets the block value increment for the adjustable object. This is not currently used.

Returns:

Currently, 1 is always returned.

 public void setVisibleAmount(int v)

Sets the length of the proportionl indicator of the adjustable object. This is not currently used.

Parameters:

v - Currently this is ignored.

 public int getVisibleAmount()

Gets the length of the propertional indicator.

 public void setValue(int v)

Sets the current value of the adjustable object. This value must be within the range defined by the minimum and maximum values for this object.

Parameters:

v - the current value

 public int getValue()

Gets the current value of the adjustable object.

Returns:

Current value of the adjustable object.

 protected void postEvent()

Create an adjustment event and send it to listeners.

See Also:

processAdjustmentEvent

 protected void processAdjustmentEvent(AdjustmentEvent e)

Process adjustment event (send it to listeners).

Parameters:

e - An adjustment event.

 public void addAdjustmentListener(AdjustmentListener l)

Add a listener to recieve adjustment events when the value of the adjustable object changes.

Parameters:

l - The listener to recieve events.

See Also:

AWTEventMulticaster, AdjustmentEvent

 public void removeAdjustmentListener(AdjustmentListener l)

Removes an adjustment listener.

Parameters:

l - The listener being removed.

See Also:

AWTEventMulticaster, AdjustmentEvent

 public static void main(String args[])

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