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The Q3ActionGroup class groups actions together. More...
#include <Q3ActionGroup>
This class is part of the Qt 3 support library. It is provided to keep old source code working. We strongly advise against using it in new code. See Porting to Qt 4 for more information.
Inherits Q3Action.
The Q3ActionGroup class groups actions together.
In some situations it is useful to group actions together. For example, if you have a left justify action, a right justify action and a center action, only one of these actions should be active at any one time, and one simple way of achieving this is to group the actions together in an action group.
An action group can also be added to a menu or a toolbar as a single unit, with all the actions within the action group appearing as separate menu options and toolbar buttons.
The actions in an action group emit their activated() (and for toggle actions, toggled()) signals as usual.
The setExclusive() function is used to ensure that only one action is active at any one time: it should be used with actions which have their toggleAction set to true.
Action group actions appear as individual menu options and toolbar buttons. For exclusive action groups use setUsesDropDown() to display the actions in a subwidget of any widget the action group is added to. For example, the actions would appear in a combobox in a toolbar or as a submenu in a menu.
Actions can be added to an action group using add(), but normally they are added by creating the action with the action group as parent. Actions can have separators dividing them using addSeparator(). Action groups are added to widgets with addTo().
This property holds whether the action group does exclusive toggling.
If exclusive is true only one toggle action in the action group can ever be active at any one time. If the user chooses another toggle action in the group the one they chose becomes active and the one that was active becomes inactive.
Access functions:
See also Q3Action::toggleAction.
This property holds whether the group's actions are displayed in a subwidget of the widgets the action group is added to.
Exclusive action groups added to a toolbar display their actions in a combobox with the action's Q3Action::text and Q3Action::iconSet properties shown. Non-exclusive groups are represented by a tool button showing their Q3Action::iconSet and text() property.
In a popup menu the member actions are displayed in a submenu.
Changing usesDropDown only affects subsequent calls to addTo().
This property's default is false.
Access functions:
Constructs an action group called name, with parent parent.
The action group is exclusive by default. Call setExclusive(false) to make the action group non-exclusive.
Constructs an action group called name, with parent parent.
If exclusive is true only one toggle action in the group will ever be active.
See also exclusive.
Destroys the object and frees allocated resources.
This signal is emitted from groups when one of its actions gets activated.
The argument is the action which was activated.
See also setExclusive(), isOn(), and Q3Action::toggled().
Adds action action to this group.
Normally an action is added to a group by creating it with the group as parent, so this function is not usually used.
See also addTo().
Adds a separator to the group.
Adds this action group to the widget w.
If isExclusive() is false or usesDropDown() is false, the actions within the group are added to the widget individually. For example, if the widget is a menu, the actions will appear as individual menu options, and if the widget is a toolbar, the actions will appear as toolbar buttons.
If both isExclusive() and usesDropDown() are true, the actions are presented either in a combobox (if w is a toolbar) or in a submenu (if w is a menu).
All actions should be added to the action group before the action group is added to the widget. If actions are added to the action group after the action group has been added to the widget these later actions will not appear.
Reimplemented from Q3Action.
See also setExclusive(), setUsesDropDown(), and removeFrom().
This function is called from the addTo() function when it has created a widget (actionWidget) for the child action a in the container.
This is an overloaded member function, provided for convenience.
This function is called from the addTo() function when it has created a menu item for the child action at the index position index in the popup menu menu.
Use add(action) instead.
This signal is emitted from exclusive groups when toggle actions change state.
The argument is the action whose state changed to "on".
See also setExclusive(), isOn(), and Q3Action::toggled().
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