The Q3CheckListItem class provides checkable list view items. 更多...
| 头： | #include <Q3CheckListItem> |
| 继承： | Q3ListViewItem |
| enum | ToggleState { Off, NoChange, On } |
| enum | Type { RadioButton, CheckBox, RadioButtonController, CheckBoxController } |
| Q3CheckListItem (Q3CheckListItem * parent , const QString & text , Type tt = RadioButtonController) | |
| Q3CheckListItem (Q3CheckListItem * parent , Q3ListViewItem * after , const QString & text , Type tt = RadioButtonController) | |
| Q3CheckListItem (Q3ListViewItem * parent , const QString & text , Type tt = RadioButtonController) | |
| Q3CheckListItem (Q3ListViewItem * parent , Q3ListViewItem * after , const QString & text , Type tt = RadioButtonController) | |
| Q3CheckListItem (Q3ListView * parent , const QString & text , Type tt = RadioButtonController) | |
| Q3CheckListItem (Q3ListView * parent , Q3ListViewItem * after , const QString & text , Type tt = RadioButtonController) | |
| Q3CheckListItem (Q3ListViewItem * parent , const QString & text , const QPixmap & p ) | |
| Q3CheckListItem (Q3ListView * parent , const QString & text , const QPixmap & p ) | |
| ~Q3CheckListItem () | |
| bool | isOn () const |
| bool | isTristate () const |
| virtual void | setOn (bool b ) |
| void | setState (ToggleState s ) |
| void | setTristate (bool b ) |
| ToggleState | state () const |
| QString | text () const |
| 类型 | type () const |
| virtual void | paintCell (QPainter * p , const QColorGroup & cg , int column , int width , int align ) |
| virtual void | paintFocus (QPainter * p , const QColorGroup & cg , const QRect & r ) |
| virtual int | rtti () const |
| virtual void | setup () |
| virtual QString | text (int n ) const |
| virtual int | width (const QFontMetrics & fm , const Q3ListView * lv , int column ) const |
| virtual void | stateChange (bool b ) |
| void | turnOffChild () |
| virtual void | activate () |
The Q3CheckListItem class provides checkable list view items.
Q3CheckListItems are used in Q3ListView s to provide Q3ListViewItem s 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 ().
另请参阅 Q3ListViewItem and Q3ListView .
This enum specifies a Q3CheckListItem 's toggle state.
| 常量 | 值 |
|---|---|
Q3CheckListItem::Off
|
0
|
Q3CheckListItem::NoChange
|
1
|
Q3CheckListItem::On
|
2
|
This enum type specifies a Q3CheckListItem 's type:
| 常量 | 值 |
|---|---|
Q3CheckListItem::RadioButton
|
0
|
Q3CheckListItem::CheckBox
|
1
|
Q3CheckListItem::RadioButtonController
|
Controller
|
Q3CheckListItem::CheckBoxController
|
? |
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.
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.
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
.
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
.
Constructs a checkable item with parent
parent
, text
text
and of type
tt
。注意，
tt
must
not
be
RadioButton
. Radio buttons must be children of a
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
。注意，
tt
must
not
be
RadioButton
. Radio buttons must be children of a
RadioButtonController
.
构造
RadioButtonController
item with parent
parent
, text
text
and pixmap
p
.
构造
RadioButtonController
item with parent
parent
, text
text
and pixmap
p
.
Destroys the item, and all its children to any depth, freeing up all allocated resources.
[virtual protected]
void
Q3CheckListItem::
activate
()
重实现自 Q3ListViewItem::activate ().
Toggle check box or set radio button to on.
Returns true if the item is toggled on; otherwise returns false.
Returns true if the item is tristate; otherwise returns false.
另请参阅 setTristate ().
[虚拟]
void
Q3CheckListItem::
paintCell
(
QPainter
*
p
, const
QColorGroup
&
cg
,
int
column
,
int
width
,
int
align
)
重实现自 Q3ListViewItem::paintCell ().
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 。(见 Qt::Alignment for valid alignments.)
[虚拟]
void
Q3CheckListItem::
paintFocus
(
QPainter
*
p
, const
QColorGroup
&
cg
, const
QRect
&
r
)
重实现自 Q3ListViewItem::paintFocus ().
Draws the focus rectangle r using the color group cg on the painter p .
[虚拟]
int
Q3CheckListItem::
rtti
() const
重实现自 Q3ListViewItem::rtti ().
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.
[虚拟]
void
Q3CheckListItem::
setOn
(
bool
b
)
Sets the button on if b is true, otherwise sets it off. Maintains radio button exclusivity.
另请参阅 isOn ().
Sets the toggle state of the checklistitem to
s
.
s
可以是
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
在
CheckBoxController
will recursivly set the states of its children to the same state.
Setting the state to
NoChange
在
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
.
另请参阅 state ().
Sets tristate to
b
若
类型
is either a
CheckBoxController
或
CheckBox
.
CheckBoxControllers
are tristate by default.
另请参阅 state () 和 isTristate ().
[虚拟]
void
Q3CheckListItem::
setup
()
重实现自 Q3ListViewItem::setup ().
Returns the state of the item.
另请参阅 setState () 和 Q3CheckListItem::ToggleState .
[virtual protected]
void
Q3CheckListItem::
stateChange
(
bool
b
)
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
.
返回项的文本。
[虚拟]
QString
Q3CheckListItem::
text
(
int
n
) const
重实现自 Q3ListViewItem::text ().
[protected]
void
Q3CheckListItem::
turnOffChild
()
If this is a
RadioButtonController
that has
RadioButton
children, turn off the child that is on.
Returns the type of this item.
[虚拟]
int
Q3CheckListItem::
width
(const
QFontMetrics
&
fm
, const
Q3ListView
*
lv
,
int
column
) const
重实现自 Q3ListViewItem::width ().