|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectcom.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.core.QObject
com.trolltech.qt.gui.QWidget
com.trolltech.qt.gui.QAbstractSpinBox
com.trolltech.qt.gui.QDoubleSpinBox
public class QDoubleSpinBox
The QDoubleSpinBox
class provides a spin box widget that takes doubles. QDoubleSpinBox
allows the user to choose a value by clicking the up and down buttons or by pressing Up or Down on the keyboard to increase or decrease the value currently displayed. The user can also type the value in manually. The spin box supports double values but can be extended to use different strings with validate()
, textFromValue()
and valueFromText()
.
Every time the value changes QDoubleSpinBox
emits the valueChanged()
signal. The current value can be fetched with value()
and set with setValue()
.
Note: QDoubleSpinBox
will round numbers so they can be displayed with the current precision. In a QDoubleSpinBox
with decimals set to 2, calling setValue
(2.555) will cause value()
to return 2.56.
Clicking the up and down buttons or using the keyboard accelerator's Up and Down arrows will increase or decrease the current value in steps of size singleStep()
. If you want to change this behavior you can reimplement the virtual function stepBy()
. The minimum and maximum value and the step size can be set using one of the constructors, and can be changed later with setMinimum()
, setMaximum()
and setSingleStep()
. The spinbox has a default precision of 2 decimal places but this can be changed using setDecimals()
.
Most spin boxes are directional, but QDoubleSpinBox
can also operate as a circular spin box, i.e. if the range is 0.0-99.9 and the current value is 99.9, clicking "up" will give 0 if wrapping() is set to true. Use setWrapping() if you want circular behavior.
The displayed value can be prepended and appended with arbitrary strings indicating, for example, currency or the unit of measurement. See setPrefix()
and setSuffix()
. The text in the spin box is retrieved with text() (which includes any prefix()
and suffix()
), or with cleanText()
(which has no prefix()
, no suffix()
and no leading or trailing whitespace).
It is often desirable to give the user a special (often default) choice in addition to the range of numeric values. See setSpecialValueText() for how to do this with QDoubleSpinBox
.
QSpinBox
, QDateTimeEdit
, QSlider
, and Spin Boxes Example.
Nested Class Summary |
---|
Nested classes/interfaces inherited from class com.trolltech.qt.gui.QAbstractSpinBox |
---|
QAbstractSpinBox.ButtonSymbols, QAbstractSpinBox.CorrectionMode, QAbstractSpinBox.StepEnabled, QAbstractSpinBox.StepEnabledFlag |
Nested classes/interfaces inherited from class com.trolltech.qt.gui.QWidget |
---|
QWidget.RenderFlag, QWidget.RenderFlags |
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
---|
QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9 |
Field Summary | |
---|---|
QSignalEmitter.Signal1 |
valueChanged
This signal is emitted whenever the spin box's value is changed. |
QSignalEmitter.Signal1 |
valueStringChanged
|
Fields inherited from class com.trolltech.qt.gui.QAbstractSpinBox |
---|
editingFinished |
Fields inherited from class com.trolltech.qt.gui.QWidget |
---|
customContextMenuRequested |
Constructor Summary | |
---|---|
QDoubleSpinBox()
Constructs a spin box with 0.0 as minimum value and 99.99 as maximum value, a step value of 1.0 and a precision of 2 decimal places. |
|
QDoubleSpinBox(QWidget parent)
Constructs a spin box with 0.0 as minimum value and 99.99 as maximum value, a step value of 1.0 and a precision of 2 decimal places. |
Method Summary | |
---|---|
java.lang.String |
cleanText()
This property holds the text of the spin box excluding any prefix, suffix, or leading or trailing whitespace. |
int |
decimals()
This property holds the precision of the spin box, in decimals. |
static QDoubleSpinBox |
fromNativePointer(QNativePointer nativePointer)
|
double |
maximum()
This property holds the maximum value of the spin box. |
double |
minimum()
This property holds the minimum value of the spin box. |
java.lang.String |
prefix()
This property holds the spin box's prefix. |
void |
setDecimals(int prec)
This property holds the precision of the spin box, in decimals. |
void |
setMaximum(double max)
This property holds the maximum value of the spin box. |
void |
setMinimum(double min)
This property holds the minimum value of the spin box. |
void |
setPrefix(java.lang.String prefix)
This property holds the spin box's prefix. |
void |
setRange(double min,
double max)
Convenience function to set the minimum and maximum values with a single function call. |
void |
setSingleStep(double val)
This property holds the step value. |
void |
setSuffix(java.lang.String suffix)
This property holds the suffix of the spin box. |
void |
setValue(double val)
This property holds the value of the spin box. |
double |
singleStep()
This property holds the step value. |
java.lang.String |
suffix()
This property holds the suffix of the spin box. |
java.lang.String |
textFromValue(double val)
This virtual function is used by the spin box whenever it needs to display the given value. |
double |
value()
This property holds the value of the spin box. |
double |
valueFromText(java.lang.String text)
This virtual function is used by the spin box whenever it needs to interpret text entered by the user as a value. |
Methods inherited from class com.trolltech.qt.gui.QAbstractSpinBox |
---|
alignment, buttonSymbols, clear, correctionMode, fixup, hasAcceptableInput, hasFrame, initStyleOption, interpretText, isAccelerated, isReadOnly, keyboardTracking, lineEdit, selectAll, setAccelerated, setAlignment, setAlignment, setButtonSymbols, setCorrectionMode, setFrame, setKeyboardTracking, setLineEdit, setReadOnly, setSpecialValueText, setWrapping, specialValueText, stepBy, stepDown, stepEnabled, stepUp, text, validate, wrapping |
Methods inherited from class com.trolltech.qt.core.QObject |
---|
childEvent, children, connectSlotsByName, customEvent, disposeLater, dumpObjectInfo, dumpObjectTree, dynamicPropertyNames, event, eventFilter, findChild, findChild, findChild, findChildren, findChildren, findChildren, findChildren, indexOfProperty, installEventFilter, isWidgetType, killTimer, moveToThread, objectName, parent, properties, property, removeEventFilter, setObjectName, setParent, setProperty, startTimer, timerEvent, toString, userProperty |
Methods inherited from class com.trolltech.qt.QtJambiObject |
---|
dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
---|
blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread |
Methods inherited from class java.lang.Object |
---|
clone, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
---|
disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Field Detail |
---|
public final QSignalEmitter.Signal1 valueStringChanged
public final QSignalEmitter.Signal1 valueChanged
Constructor Detail |
---|
public QDoubleSpinBox()
setMinimum()
, setMaximum()
, and setSingleStep()
.
public QDoubleSpinBox(QWidget parent)
setMinimum()
, setMaximum()
, and setSingleStep()
.
Method Detail |
---|
public final java.lang.String cleanText()
text
, QDoubleSpinBox::prefix
, and QDoubleSpinBox::suffix
.
public final int decimals()
Warning: The results might not be reliable with very high values for decimals.
Note: The maximum, minimum and value might change as a result of changing this property.
public final double maximum()
minimum
is adjusted if necessary, to ensure that the range remains valid. The default maximum value is 99.99.
Note: The maximum value will be rounded to match the decimals property.
decimals
, and setRange()
.
public final double minimum()
maximum
is adjusted if necessary to ensure that the range remains valid. The default minimum value is 0.0.
Note: The minimum value will be rounded to match the decimals property.
decimals
, setRange()
, and specialValueText
.
public final java.lang.String prefix()
spinbox.setPrefix("$");To turn off the prefix display, set this property to an empty string. The default is no prefix. The prefix is not displayed when
value()
== minimum()
and specialValueText() is set. If no prefix is set, prefix()
returns an empty string.
suffix()
, setSuffix()
, specialValueText(), and setSpecialValueText().
public final void setDecimals(int prec)
Warning: The results might not be reliable with very high values for decimals.
Note: The maximum, minimum and value might change as a result of changing this property.
public final void setMaximum(double max)
minimum
is adjusted if necessary, to ensure that the range remains valid. The default maximum value is 99.99.
Note: The maximum value will be rounded to match the decimals property.
decimals
, and setRange()
.
public final void setMinimum(double min)
maximum
is adjusted if necessary to ensure that the range remains valid. The default minimum value is 0.0.
Note: The minimum value will be rounded to match the decimals property.
decimals
, setRange()
, and specialValueText
.
public final void setPrefix(java.lang.String prefix)
spinbox.setPrefix("$");To turn off the prefix display, set this property to an empty string. The default is no prefix. The prefix is not displayed when
value()
== minimum()
and specialValueText() is set. If no prefix is set, prefix()
returns an empty string.
suffix()
, setSuffix()
, specialValueText(), and setSpecialValueText().
public final void setRange(double min, double max)
Note: The maximum and minimum values will be rounded to match the decimals property.
spinbox.setRange(minimum, maximum);is equivalent to:
spinbox.setMinimum(minimum); spinbox.setMaximum(maximum);
minimum
, and maximum
.
public final void setSingleStep(double val)
singleStep
. The default value is 1.0. Setting a singleStep
value of less than 0 does nothing.
public final void setSuffix(java.lang.String suffix)
spinbox.setSuffix(" km");To turn off the suffix display, set this property to an empty string. The default is no suffix. The suffix is not displayed for the
minimum()
if specialValueText() is set. If no suffix is set, suffix()
returns an empty string.
prefix()
, setPrefix()
, specialValueText(), and setSpecialValueText().
public final void setValue(double val)
setValue()
will emit valueChanged()
if the new value is different from the old one. Note: The value will be rounded so it can be displayed with the current setting of decimals.
decimals
.
public final double singleStep()
singleStep
. The default value is 1.0. Setting a singleStep
value of less than 0 does nothing.
public final java.lang.String suffix()
spinbox.setSuffix(" km");To turn off the suffix display, set this property to an empty string. The default is no suffix. The suffix is not displayed for the
minimum()
if specialValueText() is set. If no suffix is set, suffix()
returns an empty string.
prefix()
, setPrefix()
, specialValueText(), and setSpecialValueText().
public final double value()
setValue()
will emit valueChanged()
if the new value is different from the old one. Note: The value will be rounded so it can be displayed with the current setting of decimals.
decimals
.
public java.lang.String textFromValue(double val)
QWidget::locale()
.toString
(value, QLatin1Char('f'), decimals()
) and will remove the thousand separator. Reimplementations may return anything. Note: QDoubleSpinBox
does not call this function for specialValueText() and that neither prefix()
nor suffix()
should be included in the return value.
If you reimplement this, you may also need to reimplement valueFromText()
.
valueFromText()
.
public double valueFromText(java.lang.String text)
Subclasses that need to display spin box values in a non-numeric way need to reimplement this function.
Note: QDoubleSpinBox
handles specialValueText() separately; this function is only concerned with the other values.
textFromValue()
, and validate()
.
public static QDoubleSpinBox fromNativePointer(QNativePointer nativePointer)
|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |