Q3CheckListItem Class Reference
[Qt3Support module]

Detailed Description

The Q3CheckListItem class provides checkable list view items.

Q3CheckListItems are used in Q3ListViews to provide Q3ListViewItems that are checkboxes, radio buttons or controllers.

Checkbox and controller check list items may be inserted at any level in a list view. Radio button check list items must be children of a controller check list item.

The item can be checked or unchecked with setOn(). Its type can be retrieved with type() and its text retrieved with text().

See also Q3ListViewItem and Q3ListView.

Member Type Documentation

enum Q3CheckListItem::ToggleState

This enum specifies a Q3CheckListItem's toggle state.

enum Q3CheckListItem::Type

This enum type specifies a Q3CheckListItem's type:

Member Function Documentation

Q3CheckListItem::Q3CheckListItem ( Q3CheckListItem * parent, const QString & text, Type tt = RadioButtonController )

Constructs a checkable item with parent parent, text text and of type tt. Note that a RadioButton must be the child of a RadioButtonController, otherwise it will not toggle.

Q3CheckListItem::Q3CheckListItem ( Q3CheckListItem * parent, Q3ListViewItem * after, const QString & text, Type tt = RadioButtonController )

Constructs a checkable item with parent parent, which is after after in the parent's list of children, and with text text and of type tt. Note that a RadioButton must be the child of a RadioButtonController, otherwise it will not toggle.

Q3CheckListItem::Q3CheckListItem ( Q3ListViewItem * parent, const QString & text, Type tt = RadioButtonController )

Constructs a checkable item with parent parent, text text and of type tt. Note that this item must not be a RadioButton. Radio buttons must be children of a RadioButtonController.

Q3CheckListItem::Q3CheckListItem ( Q3ListViewItem * parent, Q3ListViewItem * after, const QString & text, Type tt = RadioButtonController )

Constructs a checkable item with parent parent, which is after after in the parent's list of children, with text text and of type tt. Note that this item must not be a RadioButton. Radio buttons must be children of a RadioButtonController.

Q3CheckListItem::Q3CheckListItem ( Q3ListView * parent, const QString & text, Type tt = RadioButtonController )

Constructs a checkable item with parent parent, text text and of type tt. Note that tt must not be RadioButton. Radio buttons must be children of a RadioButtonController.

Q3CheckListItem::Q3CheckListItem ( Q3ListView * parent, Q3ListViewItem * after, const QString & text, Type tt = RadioButtonController )

Constructs a checkable item with parent parent, which is after after in the parent's list of children, with text text and of type tt. Note that tt must not be RadioButton. Radio buttons must be children of a RadioButtonController.

Q3CheckListItem::Q3CheckListItem ( Q3ListViewItem * parent, const QString & text, const QPixmap & p )

Constructs a RadioButtonController item with parent parent, text text and pixmap p.

Q3CheckListItem::Q3CheckListItem ( Q3ListView * parent, const QString & text, const QPixmap & p )

Constructs a RadioButtonController item with parent parent, text text and pixmap p.

Q3CheckListItem::~Q3CheckListItem ()

Destroys the item, and all its children to any depth, freeing up all allocated resources.

void Q3CheckListItem::activate ()   [virtual protected]

Toggle check box or set radio button to on.

Reimplemented from Q3ListViewItem.

bool Q3CheckListItem::isOn () const

Returns true if the item is toggled on; otherwise returns false.

bool Q3CheckListItem::isTristate () const

Returns true if the item is tristate; otherwise returns false.

See also setTristate().

void Q3CheckListItem::paintCell ( QPainter * p, const QColorGroup & cg, int column, int width, int align )   [virtual]

Paints the item using the painter p and the color group cg. The item is in column column, has width width and has alignment align. (See Qt::Alignment for valid alignments.)

Reimplemented from Q3ListViewItem.

void Q3CheckListItem::paintFocus ( QPainter * p, const QColorGroup & cg, const QRect & r )   [virtual]

Draws the focus rectangle r using the color group cg on the painter p.

Reimplemented from Q3ListViewItem.

int Q3CheckListItem::rtti () const   [virtual]

Returns 1.

Make your derived classes return their own values for rtti(), and you can distinguish between list view items. You should use values greater than 1000, to allow for extensions to this class.

Reimplemented from Q3ListViewItem.

void Q3CheckListItem::setOn ( bool b )   [virtual]

Sets the button on if b is true, otherwise sets it off. Maintains radio button exclusivity.

See also isOn().

void Q3CheckListItem::setState ( ToggleState s )

Sets the toggle state of the checklistitem to s. s can be Off, NoChange or On.

Tristate can only be enabled for CheckBox or CheckBoxController, therefore the NoChange only applies to them.

Setting the state to On or Off on a CheckBoxController will recursivly set the states of its children to the same state.

Setting the state to NoChange on a CheckBoxController will make it recursivly recall the previous stored state of its children. If there was no previous stored state the children are all set to On.

See also state().

void Q3CheckListItem::setTristate ( bool b )

Sets tristate to b if the Type is either a CheckBoxController or a CheckBox.

CheckBoxControllers are tristate by default.

See also state() and isTristate().

ToggleState Q3CheckListItem::state () const

Returns the state of the item.

See also setState() and Q3CheckListItem::ToggleState.

void Q3CheckListItem::stateChange ( bool b )   [virtual protected]

This virtual function is called when the item changes its state. b is true if the state is On; otherwise the state is Off. NoChange (if tristate is enabled and the type is either CheckBox or CheckBoxController) reports the same as Off, so use state() to determine if the state is actually Off or NoChange.

QString Q3CheckListItem::text () const

Returns the item's text.

void Q3CheckListItem::turnOffChild ()   [protected]

If this is a RadioButtonController that has RadioButton children, turn off the child that is on.

Type Q3CheckListItem::type () const

Returns the type of this item.