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java.lang.Objectcom.trolltech.qt.internal.QSignalEmitterInternal
com.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.QSpinBox
public class QSpinBox
The QSpinBox
class provides a spin box widget. QSpinBox
is designed to handle integers and discrete sets of values (e.g., month names); use QDoubleSpinBox
for floating point values.
QSpinBox
allows the user to choose a value by clicking the up/down buttons or pressing up/down on the keyboard to increase/decrease the value currently displayed. The user can also type the value in manually. The spin box supports integer values but can be extended to use different strings with validate()
, textFromValue()
and valueFromText()
.
Every time the value changes QSpinBox
emits the valueChanged()
signals. The current value can be fetched with value()
and set with setValue()
.
Clicking the up/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 behaviour 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()
.
Most spin boxes are directional, but QSpinBox
can also operate as a circular spin box, i.e. if the range is 0-99 and the current value is 99, 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 QSpinBox
.
![]() | A spin box shown in the Windows XP widget style. |
![]() | A spin box shown in the Plastique widget style. |
![]() | A spin box shown in the Macintosh widget style. |
prefix()
, suffix()
, and specialValueText() don't provide enough control, you subclass QSpinBox
and reimplement valueFromText()
and textFromValue()
. For example, here's the code for a custom spin box that allows the user to enter icon sizes (e.g., "32 x 32"):int IconSizeSpinBox::valueFromText(const QString &text) const { QRegExp regExp(tr("(\\d+)(\\s*[xx]\\s\*\d+)?")); if (regExp.exactMatch(text)) { return regExp.cap(1).toInt(); } else { return 0; } }See the Icons example for the full source code.
QString IconSizeSpinBox::textFromValue(int value) const { return tr("%1 x %1").arg(value); }
QDoubleSpinBox
, 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.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9 |
Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal |
Field Summary | |
---|---|
QSignalEmitter.Signal1 |
valueChanged
This signal takes 1 generic argument(s). |
QSignalEmitter.Signal1 |
valueStringChanged
This signal takes 1 generic argument(s). |
Fields inherited from class com.trolltech.qt.gui.QAbstractSpinBox |
---|
editingFinished |
Fields inherited from class com.trolltech.qt.gui.QWidget |
---|
customContextMenuRequested |
Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
currentSender |
Constructor Summary | |
---|---|
QSpinBox()
Constructs a spin box with 0 as minimum value and 99 as maximum value, a step value of 1. |
|
QSpinBox(QWidget parent)
Constructs a spin box with 0 as minimum value and 99 as maximum value, a step value of 1. |
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 |
maximum()
This property holds the maximum value of the spin box. |
int |
minimum()
This property holds the minimum value of the spin box. |
java.lang.String |
prefix()
This property holds the spin box's prefix. |
void |
setMaximum(int max)
This property holds the maximum value of the spin box. |
void |
setMinimum(int 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(int min,
int max)
Convenience function to set the minimum, and maximum values with a single function call. |
void |
setSingleStep(int val)
This property holds the step value. |
void |
setSuffix(java.lang.String suffix)
This property holds the suffix of the spin box. |
void |
setValue(int val)
This property holds the value of the spin box. |
int |
singleStep()
This property holds the step value. |
java.lang.String |
suffix()
This property holds the suffix of the spin box. |
protected java.lang.String |
textFromValue(int val)
This virtual function is used by the spin box whenever it needs to display the given value. |
int |
value()
This property holds the value of the spin box. |
protected int |
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 com.trolltech.qt.internal.QSignalEmitterInternal |
---|
__qt_signalInitialization |
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
This signal takes 1 generic argument(s). We list their type and the name they go by in the description of this signal. <java.lang.String(named: arg__1)>:
public final QSignalEmitter.Signal1 valueChanged
This signal takes 1 generic argument(s). We list their type and the name they go by in the description of this signal. <java.lang.Integer(named: i)>:
This signal is emitted whenever the spin box's value is changed. The new value's integer value is passed in i.
Constructor Detail |
---|
public QSpinBox()
setMinimum()
, setMaximum()
, and setSingleStep()
.
public QSpinBox(QWidget parent)
setMinimum()
, setMaximum()
, and setSingleStep()
.
Method Detail |
---|
public final java.lang.String cleanText()
text
, QSpinBox::prefix
, and QSpinBox::suffix
.
public final int maximum()
minimum
is adjusted if necessary, to ensure that the range remains valid. The default maximum value is 99.
setRange()
, and specialValueText
.
public final int minimum()
maximum
is adjusted if necessary to ensure that the range remains valid. The default minimum value is 0.
setRange()
, and specialValueText
.
public final java.lang.String prefix()
spinbox.setPrefix("$");To turn off the prefix display, set this property to an empty string. The default is no prefix. The prefix is not displayed when
value()
== minimum()
and specialValueText() is set. If no prefix is set, prefix()
returns an empty string.
suffix()
, setSuffix()
, specialValueText(), and setSpecialValueText().
public final void setMaximum(int max)
minimum
is adjusted if necessary, to ensure that the range remains valid. The default maximum value is 99.
setRange()
, and specialValueText
.
public final void setMinimum(int min)
maximum
is adjusted if necessary to ensure that the range remains valid. The default minimum value is 0.
setRange()
, and specialValueText
.
public final void setPrefix(java.lang.String prefix)
spinbox.setPrefix("$");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(int min, int max)
spinbox.setRange(minimum, maximum);is equivalent to:
spinbox.setMinimum(minimum); spinbox.setMaximum(maximum);
minimum
, and maximum
.
public final void setSingleStep(int val)
singleStep
. The default value is 1. 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(int val)
setValue()
will emit valueChanged()
if the new value is different from the old one.
public final int singleStep()
singleStep
. The default value is 1. 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 int value()
setValue()
will emit valueChanged()
if the new value is different from the old one.
protected java.lang.String textFromValue(int val)
QWidget::locale()
.toString(). Reimplementations may return anything. (See the example in the detailed description.) Note: QSpinBox
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()
and validate()
valueFromText()
, and validate()
.
protected int valueFromText(java.lang.String text)
Subclasses that need to display spin box values in a non-numeric way need to reimplement this function.
Note: QSpinBox
handles specialValueText() separately; this function is only concerned with the other values.
textFromValue()
, and validate()
.
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