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java.lang.Objectcom.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.core.QObject
com.trolltech.qt.gui.QActionGroup
public class QActionGroup
The QActionGroup class groups actions together.
In some situations it is useful to group actions together. For example, if you have a Left Align action, a Right Align action, a Justify action, and a Center action, only one of these actions should be active at any one time. One simple way of achieving this is to group the actions together in an action group.
Here's a example (from the Menus example):
alignmentGroup = new QActionGroup(this); alignmentGroup->addAction(leftAlignAct); alignmentGroup->addAction(rightAlignAct); alignmentGroup->addAction(justifyAct); alignmentGroup->addAction(centerAct); leftAlignAct->setChecked(true);
Here we create a new action group. Since the action group is exclusive by default, only one of the actions in the group is checked at any one time.
A QActionGroup emits an triggered signal when one of its actions is chosen. Each action in an action group emits its triggered signal as usual.
As stated above, an action group is exclusive by default; it ensures that only one checkable action is active at any one time. If you want to group checkable actions without making them exclusive, you can turn of exclusiveness by calling setExclusive(false).
Actions can be added to an action group using addAction, but it is usually more convenient to specify a group when creating actions; this ensures that actions are automatically created with a parent. Actions can be visually separated from each other by adding a separator action to the group; create an action and use QAction's setSeparator() function to make it considered a separator. Action groups are added to widgets with the QWidget::addActions() function.
Nested Class Summary |
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Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
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QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1<A>, QSignalEmitter.Signal2<A,B>, QSignalEmitter.Signal3<A,B,C>, QSignalEmitter.Signal4<A,B,C,D>, QSignalEmitter.Signal5<A,B,C,D,E>, QSignalEmitter.Signal6<A,B,C,D,E,F>, QSignalEmitter.Signal7<A,B,C,D,E,F,G>, QSignalEmitter.Signal8<A,B,C,D,E,F,G,H>, QSignalEmitter.Signal9<A,B,C,D,E,F,G,H,I> |
Field Summary | |
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QSignalEmitter.Signal1<QAction> |
hovered
This signal is emitted when the given arg__1 in the action group is highlighted by the user; for example, when the user pauses with the cursor over a menu option, toolbar button, or presses an action's shortcut key combination. |
QSignalEmitter.Signal1<QAction> |
triggered
This signal is emitted when the given arg__1 in the action group is activated by the user; for example, when the user clicks a menu option, toolbar button, or presses an action's shortcut key combination. |
Constructor Summary | |
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QActionGroup(QObject parent)
Constructs an action group for the parent object. |
Method Summary | |
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java.util.List<QAction> |
actions()
Returns the list of this groups's actions. |
QAction |
addAction(QAction a)
Adds the a to this group, and returns it. |
QAction |
addAction(QIcon icon,
java.lang.String text)
Creates and returns an action with text and an icon. |
QAction |
addAction(java.lang.String text)
Creates and returns an action with text. |
QAction |
checkedAction()
Returns the currently checked action in the group, or 0 if none are checked. |
static QActionGroup |
fromNativePointer(QNativePointer nativePointer)
This function returns the QActionGroup instance pointed to by nativePointer |
boolean |
isEnabled()
Returns whether the action group is enabled. |
boolean |
isExclusive()
Returns whether the action group does exclusive checking. |
boolean |
isVisible()
Returns whether the action group is visible. |
void |
removeAction(QAction a)
Removes the a from this group. |
void |
setDisabled(boolean b)
This is a convenience function for the enabled property, that is useful for signals--slots connections. |
void |
setEnabled(boolean arg__1)
Sets whether the action group is enabled to arg__1. |
void |
setExclusive(boolean arg__1)
Sets whether the action group does exclusive checking to arg__1. |
void |
setVisible(boolean arg__1)
Sets whether the action group is visible to arg__1. |
Methods inherited from class com.trolltech.qt.core.QObject |
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blockSignals, childEvent, children, connectSlotsByName, customEvent, disposeLater, dumpObjectInfo, dumpObjectTree, dynamicPropertyNames, event, eventFilter, findChild, findChild, findChild, findChildren, findChildren, findChildren, findChildren, installEventFilter, isWidgetType, killTimer, moveToThread, objectName, parent, property, removeEventFilter, setObjectName, setParent, setProperty, signalsBlocked, startTimer, thread, timerEvent |
Methods inherited from class com.trolltech.qt.QtJambiObject |
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dispose, disposed, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
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disconnect, disconnect, signalSender |
Methods inherited from class java.lang.Object |
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clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
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disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Field Detail |
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public final QSignalEmitter.Signal1<QAction> hovered
This signal is emitted when the given arg__1 in the action group is highlighted by the user; for example, when the user pauses with the cursor over a menu option, toolbar button, or presses an action's shortcut key combination.
public final QSignalEmitter.Signal1<QAction> triggered
This signal is emitted when the given arg__1 in the action group is activated by the user; for example, when the user clicks a menu option, toolbar button, or presses an action's shortcut key combination.
Connect to this signal for command actions.
Constructor Detail |
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public QActionGroup(QObject parent)
Constructs an action group for the parent object.
The action group is exclusive by default. Call setExclusive(false) to make the action group non-exclusive.
Method Detail |
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public final java.util.List<QAction> actions()
Returns the list of this groups's actions. This may be empty.
public final QAction addAction(QAction a)
Adds the a to this group, and returns it.
Normally an action is added to a group by creating it with the group as its parent, so this function is not usually used.
public final QAction addAction(QIcon icon, java.lang.String text)
Creates and returns an action with text and an icon. The newly created action is a child of this action group.
Normally an action is added to a group by creating it with the group as its parent, so this function is not usually used.
public final QAction addAction(java.lang.String text)
Creates and returns an action with text. The newly created action is a child of this action group.
Normally an action is added to a group by creating it with the group as parent, so this function is not usually used.
public final QAction checkedAction()
Returns the currently checked action in the group, or 0 if none are checked.
public final boolean isEnabled()
Returns whether the action group is enabled.
Each action in the group will be enabled or disabled unless it has been explicitly disabled.
public final boolean isExclusive()
Returns whether the action group does exclusive checking.
If exclusive is true, only one checkable action in the action group can ever be active at any time. If the user chooses another checkable action in the group, the one they chose becomes active and the one that was active becomes inactive.
public final boolean isVisible()
Returns whether the action group is visible.
Each action in the action group will match the visible state of this group unless it has been explicitly hidden.
public final void removeAction(QAction a)
Removes the a from this group. The action will have no parent as a result.
public final void setDisabled(boolean b)
This is a convenience function for the enabled property, that is useful for signals--slots connections. If b is true the action group is disabled; otherwise it is enabled.
public final void setEnabled(boolean arg__1)
Sets whether the action group is enabled to arg__1.
Each action in the group will be enabled or disabled unless it has been explicitly disabled.
public final void setExclusive(boolean arg__1)
Sets whether the action group does exclusive checking to arg__1.
If exclusive is true, only one checkable action in the action group can ever be active at any time. If the user chooses another checkable action in the group, the one they chose becomes active and the one that was active becomes inactive.
public final void setVisible(boolean arg__1)
Sets whether the action group is visible to arg__1.
Each action in the action group will match the visible state of this group unless it has been explicitly hidden.
public static QActionGroup fromNativePointer(QNativePointer nativePointer)
nativePointer
- the QNativePointer of which object should be returned.
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