org.gnu.gtk

Class Range

public abstract class Range extends Widget

This is the base class for the group of widgets that involve graphic display and manipulation of a vale bounded within a specific minumum and maximum value.

Method Summary
void	addListener(RangeListener listener) Register an object to handle range events.
void	addRangeListener(RangeListener listener) Register an object to handle range events.
Adjustment	getAdjustment() Get the Adjustment which is the "model" object for Range.
Class	getEventListenerClass(String signal)
EventType	getEventType(String signal)
boolean	getInverted() Gets the vaue set by Range.
static Type	getType() Retrieve the runtime type used by the GLib library.
UpdateType	getUpdatePolicy() Gets the update policy
double	getValue() Gets the current value of the range.
void	removeRangeListener(RangeListener listener) Removes a listener
void	setAdjustment(Adjustment adjustment) Sets the adjustment to be used as the "model" object for this range widget.
void	setIncrements(double step, double page) Sets the step and page sizes for the range.
void	setInverted(boolean setting) Ranges normally move from lower to higher values as the slider moves from top to bottom or left to right.
void	setRange(double min, double max) Sets the allowable values in the Range, and clamps the range value to be between min and max.
void	setUpdatePolicy(UpdateType policy) Sets the update policy for the Adjustment
void	setValue(double value) Sets the current value of the range; if the value is outside the minimum or maximum range values, it will be clamped to fit inside them.

Method Detail

addListener

public void addListener(RangeListener listener)

addRangeListener

public void addRangeListener(RangeListener listener)

getAdjustment

public Adjustment getAdjustment()

Get the Adjustment which is the "model" object for Range.

Returns: The adjustment model

getEventListenerClass

public Class getEventListenerClass(String signal)

getEventType

public EventType getEventType(String signal)

getInverted

public boolean getInverted()

Gets the vaue set by Range.

Returns: True of the slider is inverted

getType

public static Type getType()

Retrieve the runtime type used by the GLib library.

getUpdatePolicy

public UpdateType getUpdatePolicy()

Gets the update policy

Returns: The current update policy

getValue

public double getValue()

Gets the current value of the range.

Returns: Current value of the range.

removeRangeListener

public void removeRangeListener(RangeListener listener)

Removes a listener

setAdjustment

public void setAdjustment(Adjustment adjustment)

Sets the adjustment to be used as the "model" object for this range widget. The adjustment indicates the current range value, the minimum and maximum range values, the step/page increments used for keybindings and scrolling, and the page size. The page size is normally 0 for Scale and nonzero for ScrollBar, and indicates the size of the visible area of the widget being scrolled. The page size affects the size of the scrollbar slider.

Parameters: adjustment The model to use

setIncrements

public void setIncrements(double step, double page)

Sets the step and page sizes for the range. The step size is used when the user clicks the ScrollBar arrows or moves Scale via arrow keys. The page size is used for example when moving via Page Up or Page Down keys.

Parameters: step Step size page Page size

setInverted

public void setInverted(boolean setting)

Ranges normally move from lower to higher values as the slider moves from top to bottom or left to right. Inverted ranges have higher values at the top or on the right rather than on the bottom or left.

Parameters: setting TRUE to invert the range

setRange

public void setRange(double min, double max)

Sets the allowable values in the Range, and clamps the range value to be between min and max. (If the range has a non-zero page size, it is clamped between min and max - page-size.)

Parameters: min Minimum range value max Maximum range value

setUpdatePolicy

public void setUpdatePolicy(UpdateType policy)

Sets the update policy for the Adjustment

setValue

public void setValue(double value)

Sets the current value of the range; if the value is outside the minimum or maximum range values, it will be clamped to fit inside them. An event is called if the value changes.

Parameters: value The new value of the range