The Q3ListView class implements a list/tree view. 更多...
| 头： | #include <Q3ListView> |
| 继承： | Q3ScrollView |
| typedef | ComparisonFlags |
| enum | RenameAction { Accept, Reject } |
| enum | ResizeMode { NoColumn, AllColumns, LastColumn } |
| enum | SelectionMode { Single, Multi, Extended, NoSelection } |
| enum | StringComparisonMode { CaseSensitive, ExactMatch, BeginsWith, EndsWith, Contains } |
| enum | WidthMode { Manual, Maximum } |
|
|
| Q3ListView (QWidget * parent = 0, const char * name = 0, Qt::WindowFlags f = 0) | |
| ~Q3ListView () | |
| virtual int | addColumn (const QString & label , int width = -1) |
| virtual int | addColumn (const QIcon & icon , const QString & label , int width = -1) |
| bool | allColumnsShowFocus () const |
| int | childCount () const |
| virtual void | clearSelection () |
| int | columnAlignment (int column ) const |
| QString | columnText (int c ) const |
| int | columnWidth (int c ) const |
| WidthMode | columnWidthMode (int c ) const |
| int | columns () const |
| Q3ListViewItem * | currentItem () const |
| RenameAction | defaultRenameAction () const |
| void | ensureItemVisible (const Q3ListViewItem * i ) |
| Q3ListViewItem * | findItem (const QString & text , int column , ComparisonFlags compare = ExactMatch | Qt::CaseSensitive) const |
| Q3ListViewItem * | firstChild () const |
| Q3Header * | header () const |
| void | hideColumn (int column ) |
| virtual void | insertItem (Q3ListViewItem * i ) |
| bool | isMultiSelection () const |
| bool | isOpen (const Q3ListViewItem * item ) const |
| bool | isRenaming () const |
| bool | isSelected (const Q3ListViewItem * i ) const |
| Q3ListViewItem * | itemAt (const QPoint & viewPos ) const |
| int | itemMargin () const |
| int | itemPos (const Q3ListViewItem * item ) |
| QRect | itemRect (const Q3ListViewItem * item ) const |
| Q3ListViewItem * | lastItem () const |
| virtual void | removeColumn (int index ) |
| virtual void | removeItem (Q3ListViewItem * item ) |
| void | repaintItem (const Q3ListViewItem * item ) const |
| ResizeMode | resizeMode () const |
| bool | rootIsDecorated () const |
| Q3ListViewItem * | selectedItem () const |
| SelectionMode | selectionMode () const |
| virtual void | setAllColumnsShowFocus (bool) |
| virtual void | setColumnAlignment (int column , int align ) |
| virtual void | setColumnText (int column , const QString & label ) |
| virtual void | setColumnText (int column , const QIcon & icon , const QString & label ) |
| virtual void | setColumnWidth (int column , int w ) |
| virtual void | setColumnWidthMode (int c , WidthMode mode ) |
| virtual void | setCurrentItem (Q3ListViewItem * i ) |
| virtual void | setDefaultRenameAction (RenameAction a ) |
| virtual void | setItemMargin (int) |
| virtual void | setMultiSelection (bool enable ) |
| virtual void | setOpen (Q3ListViewItem * item , bool open ) |
| virtual void | setResizeMode (ResizeMode m ) |
| virtual void | setRootIsDecorated (bool) |
| virtual void | setSelected (Q3ListViewItem * item , bool selected ) |
| void | setSelectionAnchor (Q3ListViewItem * item ) |
| void | setSelectionMode (SelectionMode mode ) |
| virtual void | setShowSortIndicator (bool show ) |
| virtual void | setShowToolTips (bool b ) |
| void | setSortColumn (int column ) |
| void | setSortOrder (Qt::SortOrder order ) |
| virtual void | setSorting (int column , bool ascending = true) |
| virtual void | setTreeStepSize (int) |
| bool | showSortIndicator () const |
| bool | showToolTips () const |
| virtual void | sort () |
| int | sortColumn () const |
| Qt::SortOrder | sortOrder () const |
| virtual void | takeItem (Q3ListViewItem * i ) |
| int | treeStepSize () const |
| virtual bool | eventFilter (QObject * o , QEvent * e ) |
| virtual QVariant | inputMethodQuery (Qt::InputMethodQuery query ) const |
| virtual QSize | minimumSizeHint () const |
| virtual QSize | sizeHint () const |
| void | adjustColumn (int col ) |
| virtual void | clear () |
| virtual void | invertSelection () |
| virtual void | selectAll (bool select ) |
| virtual void | setContentsPos (int x , int y ) |
| void | triggerUpdate () |
| void | clicked (Q3ListViewItem * item ) |
| void | clicked (Q3ListViewItem * item , const QPoint & pnt , int c ) |
| void | collapsed (Q3ListViewItem * item ) |
| void | contextMenuRequested (Q3ListViewItem * item , const QPoint & pos , int col ) |
| void | currentChanged (Q3ListViewItem * item ) |
| void | doubleClicked (Q3ListViewItem * item ) |
| void | doubleClicked (Q3ListViewItem * item , const QPoint & point , int column ) |
| void | dropped (QDropEvent * e ) |
| void | expanded (Q3ListViewItem * item ) |
| void | itemRenamed (Q3ListViewItem * item , int col , const QString & text ) |
| void | itemRenamed (Q3ListViewItem * item , int col ) |
| void | mouseButtonClicked (int button , Q3ListViewItem * item , const QPoint & pos , int c ) |
| void | mouseButtonPressed (int button , Q3ListViewItem * item , const QPoint & pos , int c ) |
| void | onItem (Q3ListViewItem * i ) |
| void | onViewport () |
| void | pressed (Q3ListViewItem * item ) |
| void | pressed (Q3ListViewItem * item , const QPoint & pnt , int c ) |
| void | returnPressed (Q3ListViewItem * item ) |
| void | rightButtonClicked (Q3ListViewItem * item , const QPoint & point , int column ) |
| void | rightButtonPressed (Q3ListViewItem * item , const QPoint & point , int column ) |
| void | selectionChanged () |
| void | selectionChanged (Q3ListViewItem * item ) |
| void | spacePressed (Q3ListViewItem * item ) |
| virtual Q3DragObject * | dragObject () |
| virtual void | paintEmptyArea (QPainter * p , const QRect & rect ) |
| virtual void | startDrag () |
| virtual void | changeEvent (QEvent * ev ) |
| virtual void | contentsContextMenuEvent (QContextMenuEvent * e ) |
| virtual void | contentsDragEnterEvent (QDragEnterEvent * e ) |
| virtual void | contentsDragLeaveEvent (QDragLeaveEvent * e ) |
| virtual void | contentsDragMoveEvent (QDragMoveEvent * e ) |
| virtual void | contentsDropEvent (QDropEvent * e ) |
| virtual void | contentsMouseDoubleClickEvent (QMouseEvent * e ) |
| virtual void | contentsMouseMoveEvent (QMouseEvent * e ) |
| virtual void | contentsMousePressEvent (QMouseEvent * e ) |
| virtual void | contentsMouseReleaseEvent (QMouseEvent * e ) |
| virtual void | drawContentsOffset (QPainter * p , int ox , int oy , int cx , int cy , int cw , int ch ) |
| virtual void | focusInEvent (QFocusEvent * e ) |
| virtual void | focusOutEvent (QFocusEvent * e ) |
| virtual void | keyPressEvent (QKeyEvent * e ) |
| virtual void | resizeEvent (QResizeEvent * e ) |
| virtual void | showEvent (QShowEvent *) |
| virtual void | viewportResizeEvent (QResizeEvent * e ) |
| void | doAutoScroll () |
| void | updateContents () |
The Q3ListView class implements a list/tree view.
It can display and control a hierarchy of multi-column items, and provides the ability to add new items at any time. The user may select one or many items (depending on the
SelectionMode
) and sort the list in increasing or decreasing order by any column.
The simplest pattern of use is to create a Q3ListView , add some column headers using addColumn () and create one or more Q3ListViewItem or Q3CheckListItem objects with the Q3ListView 作为父级。
Further nodes can be added to the list view object (the root of the tree) or as child nodes to Q3ListViewItems.
The main setup functions are:
| 函数 | 动作 |
|---|---|
| addColumn () | Adds a column with a text label and perhaps width. Columns are counted from the left starting with column 0. |
| setColumnWidthMode () | Sets the column to be resized automatically or not. |
| setAllColumnsShowFocus () | Sets whether items should show keyboard focus using all columns or just column 0. The default is to show focus just using column 0. |
| setRootIsDecorated () | Sets whether root items can be opened and closed by the user and have open/close decoration to their left. The default is false. |
| setTreeStepSize () | Sets how many pixels an item's children are indented relative to their parent. The default is 20. This is mostly a matter of taste. |
| setSorting () | Sets whether the items should be sorted, whether it should be in ascending or descending order, and by what column they should be sorted. By default the list view is sorted by the first column; to switch this off call setSorting (-1). |
There are several functions for mapping between items and coordinates. itemAt () returns the item at a position on-screen, itemRect () returns the rectangle an item occupies on the screen, and itemPos () returns the position of any item (whether it is on-screen or not). firstChild () returns the list view's first item (not necessarily visible on-screen).
You can iterate over visible items using Q3ListViewItem::itemBelow (); over a list view's top-level items using Q3ListViewItem::firstChild () 和 Q3ListViewItem::nextSibling (); or every item using a Q3ListViewItemIterator 。见 Q3ListViewItem documentation for examples of traversal.
An item can be moved amongst its siblings using
Q3ListViewItem::moveItem
(). To move an item in the hierarchy use
takeItem
() 和
insertItem
(). Item's (and all their child items) are deleted with
delete
; to delete all the list view's items use
clear
().
There are a variety of selection modes described in the
Q3ListView::SelectionMode
documentation. The default is
Single
selection, which you can change using
setSelectionMode
().
因为 Q3ListView offers multiple selection it must display keyboard focus and selection state separately. Therefore there are functions both to set the selection state of an item ( setSelected ()) and to set which item displays keyboard focus ( setCurrentItem ()).
Q3ListView
emits two groups of signals; one group signals changes in selection/focus state and one indicates selection. The first group consists of
selectionChanged
() (applicable to all list views),
selectionChanged
(
Q3ListViewItem
*) (applicable only to a
Single
selection list view), and
currentChanged
(
Q3ListViewItem
*). The second group consists of
doubleClicked
(
Q3ListViewItem
*),
returnPressed
(
Q3ListViewItem
*),
rightButtonClicked
(
Q3ListViewItem
*, const
QPoint
&, int), etc.
Note that changing the state of the list view in a slot connected to a list view signal may cause unexpected side effects. If you need to change the list view's state in response to a signal, use a single shot timer with a time out of 0, and connect this timer to a slot that modifies the list view's state.
In Motif style, Q3ListView deviates fairly strongly from the look and feel of the Motif hierarchical tree view. This is done mostly to provide a usable keyboard interface and to make the list view look better with a white background.
若
selectionMode
() 是
Single
(the default) the user can select one item at a time, e.g. by clicking an item with the mouse, see
Q3ListView::SelectionMode
了解细节。
The list view can be navigated either using the mouse or the keyboard. Clicking a - icon closes an item (hides its children) and clicking a + icon opens an item (shows its children). The keyboard controls are these:
| 按键 | 动作 |
|---|---|
| Home | Make the first item current and visible. |
| End | Make the last item current and visible. |
| Page Up | Make the item above the top visible item current and visible. |
| Page Down | Make the item below the bottom visible item current and visible. |
| Up Arrow | Make the item above the current item current and visible. |
| Down Arrow | Make the item below the current item current and visible. |
| Left Arrow | If the current item is closed ( + icon) or has no children, make its parent item current and visible. If the current item is open ( - icon) close it, i.e. hide its children. Exception: if the current item is the first item and is closed and the horizontal scroll bar is offset to the right the list view will be scrolled left. |
| Right Arrow | If the current item is closed ( + icon) and has children, the item is opened. If the current item is opened ( - icon) and has children the item's first child is made current and visible. If the current item has no children the list view is scrolled right. |
If the user starts typing letters with the focus in the list view an incremental search will occur. For example if the user types 'd' the current item will change to the first item that begins with the letter 'd'; if they then type 'a', the current item will change to the first item that begins with 'da', and so on. If no item begins with the letters they type the current item doesn't change.
Note that the list view's size hint is calculated taking into account the height and width to produce a nice aspect ratio. This may mean that you need to reimplement sizeHint () in some cases.
警告： The list view assumes ownership of all list view items and will delete them when it does not need them any more.
另请参阅 Q3ListViewItem and Q3CheckListItem .
This typedef is used in Q3ListView 's API for values that are OR'd combinations of StringComparisonMode 值。
另请参阅 StringComparisonMode .
This enum describes whether a rename operation is accepted if the rename editor loses focus without the user pressing Enter.
| 常量 | 值 | 描述 |
|---|---|---|
Q3ListView::Accept
|
0
|
Rename if Enter is pressed or focus is lost. |
Q3ListView::Reject
|
1
|
Discard the rename operation if focus is lost (and Enter has not been pressed). |
This enum describes how the list view's header adjusts to resize events which affect the width of the list view.
| 常量 | 值 | 描述 |
|---|---|---|
Q3ListView::NoColumn
|
0
|
The columns do not get resized in resize events. |
Q3ListView::AllColumns
|
1
|
All columns are resized equally to fit the width of the list view. |
Q3ListView::LastColumn
|
2
|
The last column is resized to fit the width of the list view. |
This enumerated type is used by Q3ListView to indicate how it reacts to selection by the user.
| 常量 | 值 | 描述 |
|---|---|---|
Q3ListView::Single
|
0
|
When the user selects an item, any already-selected item becomes unselected, and the user cannot unselect the selected item. |
Q3ListView::Multi
|
1
|
When the user selects an item in the usual way, the selection status of that item is toggled and the other items are left alone. |
Q3ListView::Extended
|
2
|
When the user selects an item in the usual way, the selection is cleared and the new item selected. However, if the user presses the Ctrl key when clicking on an item, the clicked item gets toggled and all other items are left untouched. And if the user presses the Shift key while clicking on an item, all items between the current item and the clicked item get selected or unselected, depending on the state of the clicked item. Also, multiple items can be selected by dragging the mouse over them. |
Q3ListView::NoSelection
|
3
|
无法选择项。 |
In other words,
Single
is a real single-selection list view,
Multi
a real multi-selection list view,
Extended
is a list view where users can select multiple items but usually want to select either just one or a range of contiguous items, and
NoSelection
is a list view where the user can look but not touch.
This enum type is used to set the string comparison mode when searching for an item. We'll refer to the string being searched as the 'target' string.
| 常量 | 值 | 描述 |
|---|---|---|
Q3ListView::CaseSensitive
|
0x00001
|
The strings must match case sensitively. |
Q3ListView::ExactMatch
|
0x00010
|
The target and search strings must match exactly. |
Q3ListView::BeginsWith
|
0x00002
|
The target string begins with the search string. |
Q3ListView::EndsWith
|
0x00004
|
The target string ends with the search string. |
Q3ListView::Contains
|
0x00008
|
The target string contains the search string. |
If you OR these flags together (excluding
CaseSensitive
), the search criteria be applied in the following order:
ExactMatch
,
BeginsWith
,
EndsWith
,
Contains
.
Matching is case-insensitive unless
CaseSensitive
有设置。
CaseSensitive
can be OR-ed with any combination of the other flags.
另请参阅 ComparisonFlags .
This enum type describes how the width of a column in the view changes.
| 常量 | 值 | 描述 |
|---|---|---|
Q3ListView::Manual
|
0
|
the column width does not change automatically. |
Q3ListView::Maximum
|
1
|
the column is automatically sized according to the widths of all items in the column. (Note: The column never shrinks in this case.) This means that the column is always resized to the width of the item with the largest width in the column. |
另请参阅 setColumnWidth (), setColumnWidthMode ()，和 columnWidth ().
This property holds whether items should show keyboard focus using all columns.
If this property is true all columns will show focus and selection states, otherwise only column 0 will show focus.
默认为 false。
Setting this to true if it's not necessary may cause noticeable flicker.
访问函数：
| bool | allColumnsShowFocus () const |
| virtual void | setAllColumnsShowFocus (bool) |
This property holds the number of parentless (top-level) Q3ListViewItem objects in this Q3ListView.
Holds the current number of parentless (top-level) Q3ListViewItem objects in this Q3ListView .
访问函数：
| int | childCount () const |
另请参阅 Q3ListViewItem::childCount ().
This property holds the number of columns in this list view.
访问函数：
| int | columns () const |
另请参阅 addColumn () 和 removeColumn ().
This property holds what action to perform when the editor loses focus during renaming.
若此特性为
Accept
, and the user renames an item and the editor loses focus (without the user pressing Enter), the item will still be renamed. If the property's value is
Reject
, the item will not be renamed unless the user presses Enter. The default is
Reject
.
访问函数：
| RenameAction | defaultRenameAction () const |
| virtual void | setDefaultRenameAction (RenameAction a ) |
This property holds the advisory item margin that list items may use.
The item margin defaults to one pixel and is the margin between the item's edges and the area where it draws its contents. Q3ListViewItem::paintFocus () draws in the margin.
访问函数：
| int | itemMargin () const |
| virtual void | setItemMargin (int) |
另请参阅 Q3ListViewItem::paintCell ().
This property holds whether the list view is in multi-selection or extended-selection mode.
If you enable multi-selection,
Multi
, mode, it is possible to specify whether or not this mode should be extended.
Extended
means that the user can select multiple items only when pressing the Shift or Ctrl key at the same time.
The default selection mode is
Single
.
访问函数：
| bool | isMultiSelection () const |
| virtual void | setMultiSelection (bool enable ) |
另请参阅 selectionMode ().
This property holds whether all, none or the only the last column should be resized.
Specifies whether all, none or only the last column should be resized to fit the full width of the list view. The values for this property can be one of:
NoColumn
(默认)，
AllColumns
or
LastColumn
.
警告： Setting the resize mode should be done after all necessary columns have been added to the list view, otherwise the behavior is undefined.
访问函数：
| ResizeMode | resizeMode () const |
| virtual void | setResizeMode (ResizeMode m ) |
This property holds whether the list view shows open/close signs on root items.
Open/close signs are small + or - symbols in windows style, or arrows in Motif style. The default is false.
访问函数：
| bool | rootIsDecorated () const |
| virtual void | setRootIsDecorated (bool) |
This property holds the list view's selection mode.
The mode can be
Single
(默认)，
Extended
,
Multi
or
NoSelection
.
访问函数：
| SelectionMode | selectionMode () const |
| void | setSelectionMode (SelectionMode mode ) |
另请参阅 multiSelection .
This property holds whether the list view header should display a sort indicator.
If this property is true, an arrow is drawn in the header of the list view to indicate the sort order of the list view contents. The arrow will be drawn in the correct column and will point up or down, depending on the current sort direction. The default is false (don't show an indicator).
访问函数：
| bool | showSortIndicator () const |
| virtual void | setShowSortIndicator (bool show ) |
另请参阅 Q3Header::setSortIndicator ().
This property holds whether this list view should show tooltips for truncated column texts.
默认为 true。
访问函数：
| bool | showToolTips () const |
| virtual void | setShowToolTips (bool b ) |
This property holds the number of pixels a child is offset from its parent.
The default is 20 pixels.
Of course, this property is only meaningful for hierarchical list views.
访问函数：
| int | treeStepSize () const |
| virtual void | setTreeStepSize (int) |
Constructs a new empty list view called name 采用父级 parent and widget attributes f .
This constructor sets the
WA_StaticContent
和
Qt::WA_NoBackground
attributes to boost performance when drawing Q3ListViewItems. This may be unsuitable for custom
Q3ListViewItem
classes, in which case
Qt::WA_StaticContents
and
Qt::WA_NoBackground
should be cleared on the
viewport
() after construction.
另请参阅 QWidget::setAttribute ().
Destroys the list view, deleting all its items, and frees up all allocated resources.
[虚拟]
int
Q3ListView::
addColumn
(const
QString
&
label
,
int
width
= -1)
添加 width pixels wide column with the column header label to the list view, and returns the index of the new column.
All columns apart from the first one are inserted to the right of the existing ones.
若
width
is negative, the new column's
WidthMode
被设为
Maximum
而不是
Manual
.
另请参阅 setColumnText (), setColumnWidth ()，和 setColumnWidthMode ().
[虚拟]
int
Q3ListView::
addColumn
(const
QIcon
&
icon
, const
QString
&
label
,
int
width
= -1)
这是重载函数。
添加 width pixels wide new column with the header label 和 icon to the list view, and returns the index of the column.
若
width
is negative, the new column's
WidthMode
被设为
Maximum
, and to
Manual
否则。
另请参阅 setColumnText (), setColumnWidth ()，和 setColumnWidthMode ().
[slot]
void
Q3ListView::
adjustColumn
(
int
col
)
Adjusts the column col to its preferred width
[virtual protected]
void
Q3ListView::
changeEvent
(
QEvent
*
ev
)
重实现自 QWidget::changeEvent ().
[virtual slot]
void
Q3ListView::
clear
()
Removes and deletes all the items in this list view and triggers an update.
另请参阅 triggerUpdate ().
[虚拟]
void
Q3ListView::
clearSelection
()
Sets all the items to be not selected, updates the list view as necessary, and emits the
selectionChanged
() signals. Note that for
Multi
selection list views this function needs to iterate over
all
项。
另请参阅 setSelected () 和 setMultiSelection ().
[signal]
void
Q3ListView::
clicked
(
Q3ListViewItem
*
item
)
This signal is emitted whenever the user clicks (mouse pressed and mouse released) in the list view. item is the clicked list view item, or 0 if the user didn't click on an item.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
注意： 信号 clicked 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *)>(&Q3ListView::clicked), [=](Q3ListViewItem *item){ /* ... */ });
[signal]
void
Q3ListView::
clicked
(
Q3ListViewItem
*
item
, const
QPoint
&
pnt
,
int
c
)
这是重载函数。
This signal is emitted whenever the user clicks (mouse pressed and mouse released) in the list view. item is the clicked list view item, or 0 if the user didn't click on an item. pnt is the position where the user has clicked in global coordinates. If item is not 0, c is the list view column into which the user pressed; if item is 0 c 's value is undefined.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
注意： 信号 clicked 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *, const QPoint &, int)>(&Q3ListView::clicked), [=](Q3ListViewItem *item, const QPoint &pnt, int c){ /* ... */ });
[signal]
void
Q3ListView::
collapsed
(
Q3ListViewItem
*
item
)
此信号发射当 item has been collapsed, i.e. when the children of item are hidden.
另请参阅 setOpen () 和 expanded ().
Returns the alignment of column
column
。默认为
Qt::AlignAuto
.
另请参阅 setColumnAlignment () 和 Qt::Alignment .
Returns the text of column c .
另请参阅 setColumnText ().
Returns the width of column c .
另请参阅 setColumnWidth ().
返回
WidthMode
for column
c
.
另请参阅 setColumnWidthMode ().
[virtual protected]
void
Q3ListView::
contentsContextMenuEvent
(
QContextMenuEvent
*
e
)
重实现自 Q3ScrollView::contentsContextMenuEvent ().
[virtual protected]
void
Q3ListView::
contentsDragEnterEvent
(
QDragEnterEvent
*
e
)
重实现自 Q3ScrollView::contentsDragEnterEvent ().
[virtual protected]
void
Q3ListView::
contentsDragLeaveEvent
(
QDragLeaveEvent
*
e
)
重实现自 Q3ScrollView::contentsDragLeaveEvent ().
[virtual protected]
void
Q3ListView::
contentsDragMoveEvent
(
QDragMoveEvent
*
e
)
重实现自 Q3ScrollView::contentsDragMoveEvent ().
[virtual protected]
void
Q3ListView::
contentsDropEvent
(
QDropEvent
*
e
)
重实现自 Q3ScrollView::contentsDropEvent ().
[virtual protected]
void
Q3ListView::
contentsMouseDoubleClickEvent
(
QMouseEvent
*
e
)
重实现自 Q3ScrollView::contentsMouseDoubleClickEvent ().
Processes the mouse double-click event e on behalf of the viewed widget.
[virtual protected]
void
Q3ListView::
contentsMouseMoveEvent
(
QMouseEvent
*
e
)
重实现自 Q3ScrollView::contentsMouseMoveEvent ().
Processes the mouse move event e on behalf of the viewed widget.
[virtual protected]
void
Q3ListView::
contentsMousePressEvent
(
QMouseEvent
*
e
)
重实现自 Q3ScrollView::contentsMousePressEvent ().
Processes the mouse press event e on behalf of the viewed widget.
[virtual protected]
void
Q3ListView::
contentsMouseReleaseEvent
(
QMouseEvent
*
e
)
重实现自 Q3ScrollView::contentsMouseReleaseEvent ().
Processes the mouse release event e on behalf of the viewed widget.
[signal]
void
Q3ListView::
contextMenuRequested
(
Q3ListViewItem
*
item
, const
QPoint
&
pos
,
int
col
)
This signal is emitted when the user invokes a context menu with the right mouse button or with special system keys. If the keyboard was used item is the current item; if the mouse was used, item is the item under the mouse pointer or 0 if there is no item under the mouse pointer. If no item is clicked, the column index emitted is -1.
pos is the position for the context menu in the global coordinate system.
col is the column on which the user pressed, or -1 if the signal was triggered by a key event.
[signal]
void
Q3ListView::
currentChanged
(
Q3ListViewItem
*
item
)
This signal is emitted whenever the current item has changed (normally after the screen update). The current item is the item responsible for indicating keyboard focus.
The argument is the newly current item , or 0 if the change made no item current. This can happen, for example, if all the items in the list view are deleted.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
另请参阅 setCurrentItem () 和 currentItem ().
Returns the current item, or 0 if there isn't one.
另请参阅 setCurrentItem ().
[protected slot]
void
Q3ListView::
doAutoScroll
()
This slot handles auto-scrolling when the mouse button is pressed and the mouse is outside the widget.
[signal]
void
Q3ListView::
doubleClicked
(
Q3ListViewItem
*
item
)
This signal is emitted whenever an item is double-clicked. It's emitted on the second button press, not the second button release. item is the list view item on which the user did the double-click.
注意： 信号 doubleClicked 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *)>(&Q3ListView::doubleClicked), [=](Q3ListViewItem *item){ /* ... */ });
[signal]
void
Q3ListView::
doubleClicked
(
Q3ListViewItem
*
item
, const
QPoint
&
point
,
int
column
)
This signal is emitted when a double-click occurs. It's emitted on the second button press, not the second button release. The item 是 Q3ListViewItem the button was double-clicked on (which could be 0 if it wasn't double-clicked on an item). The point where the double-click occurred is given in global coordinates. If an item was double-clicked on, column is the column within the item that was double-clicked; otherwise column 为 -1。
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
注意： 信号 doubleClicked 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *, const QPoint &, int)>(&Q3ListView::doubleClicked), [=](Q3ListViewItem *item, const QPoint &point, int column){ /* ... */ });
[virtual protected]
Q3DragObject
* Q3ListView::
dragObject
()
If the user presses the mouse on an item and starts moving the mouse, and the item allow dragging (see Q3ListViewItem::setDragEnabled ()), this function is called to get a drag object and a drag is started unless dragObject() returns 0.
By default this function returns 0. You should reimplement it and create a Q3DragObject depending on the selected items.
[virtual protected]
void
Q3ListView::
drawContentsOffset
(
QPainter
*
p
,
int
ox
,
int
oy
,
int
cx
,
int
cy
,
int
cw
,
int
ch
)
重实现自 Q3ScrollView::drawContentsOffset ().
调用 Q3ListViewItem::paintCell () 和 Q3ListViewItem::paintBranches () as necessary for all list view items that require repainting in the cw pixels wide and ch pixels high bounding rectangle starting at position cx , cy with offset ox , oy . Uses the painter p .
[signal]
void
Q3ListView::
dropped
(
QDropEvent
*
e
)
This signal is emitted, when a drop event occurred on the viewport (not onto an item).
e provides all the information about the drop.
Ensures that item i is visible, scrolling the list view vertically if necessary and opening (expanding) any parent items if this is required to show the item.
另请参阅 itemRect () 和 Q3ScrollView::ensureVisible ().
[虚拟]
bool
Q3ListView::
eventFilter
(
QObject
*
o
,
QEvent
*
e
)
重实现自 QObject::eventFilter ().
Redirects the event e relating to object o , for the viewport to mousePressEvent (), keyPressEvent () and friends.
[signal]
void
Q3ListView::
expanded
(
Q3ListViewItem
*
item
)
此信号发射当 item has been expanded, i.e. when the children of item are shown.
另请参阅 setOpen () 和 collapsed ().
Finds the first list view item in column column , that matches text and returns the item, or returns 0 of no such item could be found. Pass OR-ed together ComparisonFlags values in the compare flag, to control how the matching is performed. The default comparison mode is case-sensitive, exact match.
Returns the first item in this Q3ListView . Returns 0 if there is no first item.
A list view's items can be traversed using firstChild() and nextSibling() or using a Q3ListViewItemIterator .
另请参阅 itemAt (), Q3ListViewItem::itemBelow ()，和 Q3ListViewItem::itemAbove ().
[virtual protected]
void
Q3ListView::
focusInEvent
(
QFocusEvent
*
e
)
重实现自 QWidget::focusInEvent ().
[virtual protected]
void
Q3ListView::
focusOutEvent
(
QFocusEvent
*
e
)
重实现自 QWidget::focusOutEvent ().
返回 Q3Header object that manages this list view's columns. Please don't modify the header behind the list view's back.
You may safely call Q3Header::setClickEnabled (), Q3Header::setResizeEnabled (), Q3Header::setMovingEnabled (), Q3Header::hide () and all the const Q3Header 函数。
Hides the column specified at column . This is a convenience function that calls setColumnWidth (column, 0).
Note: The user may still be able to resize the hidden column using the header handles. To prevent this, call setResizeEnabled(false, column ) on the list views header.
另请参阅 setColumnWidth ().
[虚拟]
QVariant
Q3ListView::
inputMethodQuery
(
Qt::InputMethodQuery
query
) const
重实现自 QWidget::inputMethodQuery ().
[虚拟]
void
Q3ListView::
insertItem
(
Q3ListViewItem
*
i
)
Inserts item i into the list view as a top-level item. You do not need to call this unless you've called takeItem ( i ) 或 Q3ListViewItem::takeItem ( i ) and need to reinsert i elsewhere.
另请参阅 Q3ListViewItem::takeItem () 和 takeItem ().
[virtual slot]
void
Q3ListView::
invertSelection
()
Inverts the selection. Only works in
Multi
and
Extended
selection modes.
Returns true if this list view item has children and they are not explicitly hidden; otherwise returns false.
Identical to item ->isOpen(). Provided for completeness.
另请参阅 setOpen ().
Returns true if an item is being renamed; otherwise returns false.
Returns true if the list view item i is selected; otherwise returns false.
另请参阅 Q3ListViewItem::isSelected ().
Returns the list view item at viewPos 。注意， viewPos is in the viewport ()'s coordinate system, not in the list view's own, much larger, coordinate system.
itemAt() returns 0 if there is no such item.
Note that you also get the pointer to the item if viewPos points to the root decoration (see setRootIsDecorated ()) of the item. To check whether or not viewPos is on the root decoration of the item, you can do something like this:
Q3ListViewItem *i = itemAt(p); if (i) { if (p.x() > header()->sectionPos(header()->mapToIndex(0)) + treeStepSize() * (i->depth() + (rootIsDecorated() ? 1 : 0)) + itemMargin() || p.x() < header()->sectionPos(header()->mapToIndex(0))) { ; // p is not on root decoration else ; // p is on the root decoration }
This might be interesting if you use this function to find out where the user clicked and if you want to start a drag (which you do not want to do if the user clicked onto the root decoration of an item).
另请参阅 itemPos (), itemRect ()，和 viewportToContents ().
Returns the y-coordinate of item in the list view's coordinate system. This function is normally much slower than itemAt () but it works for all items, whereas itemAt () normally works only for items on the screen.
This is a thin wrapper around Q3ListViewItem::itemPos ().
Returns the rectangle on the screen that item item occupies in viewport ()'s coordinates, or an invalid rectangle if item is 0 or is not currently visible.
The rectangle returned does not include any children of the rectangle (i.e. it uses Q3ListViewItem::height (), rather than Q3ListViewItem::totalHeight ()). If you want the rectangle to include children you can use something like this:
QRect r(listView->itemRect(item)); r.setHeight(qMin(item->totalHeight(), listView->viewport->height() - r.y()))
Note the way it avoids too-high rectangles. totalHeight() can be much larger than the window system's coordinate system allows.
itemRect() is comparatively slow. It's best to call it only for items that are probably on-screen.
[signal]
void
Q3ListView::
itemRenamed
(
Q3ListViewItem
*
item
,
int
col
, const
QString
&
text
)
此信号发射当 item has been renamed to text , e.g. by in in-place renaming, in column col .
注意： 信号 itemRenamed 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *, int, const QString &)>(&Q3ListView::itemRenamed), [=](Q3ListViewItem *item, int col, const QString &text){ /* ... */ });
另请参阅 Q3ListViewItem::setRenameEnabled ().
[signal]
void
Q3ListView::
itemRenamed
(
Q3ListViewItem
*
item
,
int
col
)
这是重载函数。
此信号发射当 item has been renamed, e.g. by in-place renaming, in column col .
注意： 信号 itemRenamed 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *, int)>(&Q3ListView::itemRenamed), [=](Q3ListViewItem *item, int col){ /* ... */ });
另请参阅 Q3ListViewItem::setRenameEnabled ().
[virtual protected]
void
Q3ListView::
keyPressEvent
(
QKeyEvent
*
e
)
重实现自 QWidget::keyPressEvent ().
Returns the last item in the list view tree. Returns 0 if there are no items in the Q3ListView .
This function is slow because it traverses the entire tree to find the last item.
[虚拟]
QSize
Q3ListView::
minimumSizeHint
() const
重实现自 QWidget::minimumSizeHint ().
[signal]
void
Q3ListView::
mouseButtonClicked
(
int
button
,
Q3ListViewItem
*
item
, const
QPoint
&
pos
,
int
c
)
This signal is emitted whenever the user clicks (mouse pressed and mouse released) in the list view at position pos . button is the mouse button that the user pressed, item is the clicked list view item or 0 if the user didn't click on an item. If item is not 0, c is the list view column into which the user pressed; if item is 0 c 's value is undefined.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
[signal]
void
Q3ListView::
mouseButtonPressed
(
int
button
,
Q3ListViewItem
*
item
, const
QPoint
&
pos
,
int
c
)
This signal is emitted whenever the user pressed the mouse button in the list view at position pos . button is the mouse button which the user pressed, item is the pressed list view item or 0 if the user didn't press on an item. If item is not 0, c is the list view column into which the user pressed; if item is 0 c 's value is undefined.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
[signal]
void
Q3ListView::
onItem
(
Q3ListViewItem
*
i
)
This signal is emitted when the user moves the mouse cursor onto item i , similar to the QWidget::enterEvent () 函数。
[signal]
void
Q3ListView::
onViewport
()
This signal is emitted when the user moves the mouse cursor from an item to an empty part of the list view.
[virtual protected]
void
Q3ListView::
paintEmptyArea
(
QPainter
*
p
, const
QRect
&
rect
)
Paints rect so that it looks like empty background using painter p . rect is in widget coordinates, ready to be fed to p .
The default function fills rect 采用 viewport ()->backgroundBrush().
[signal]
void
Q3ListView::
pressed
(
Q3ListViewItem
*
item
)
This signal is emitted whenever the user presses the mouse button in a list view. item is the list view item on which the user pressed the mouse button, or 0 if the user didn't press the mouse on an item.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
注意： 信号 pressed 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *)>(&Q3ListView::pressed), [=](Q3ListViewItem *item){ /* ... */ });
[signal]
void
Q3ListView::
pressed
(
Q3ListViewItem
*
item
, const
QPoint
&
pnt
,
int
c
)
这是重载函数。
This signal is emitted whenever the user presses the mouse button in a list view. item is the list view item on which the user pressed the mouse button, or 0 if the user didn't press the mouse on an item. pnt is the position of the mouse cursor in global coordinates, and c is the column where the mouse cursor was when the user pressed the mouse button.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
注意： 信号 pressed 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *, const QPoint &, int)>(&Q3ListView::pressed), [=](Q3ListViewItem *item, const QPoint &pnt, int c){ /* ... */ });
[虚拟]
void
Q3ListView::
removeColumn
(
int
index
)
Removes the column at position index .
[虚拟]
void
Q3ListView::
removeItem
(
Q3ListViewItem
*
item
)
移除给定 item 。使用 takeItem () 代替。
Repaints item on the screen if item is currently visible. Takes care to avoid multiple repaints.
[virtual protected]
void
Q3ListView::
resizeEvent
(
QResizeEvent
*
e
)
重实现自 QWidget::resizeEvent ().
Ensures that the header is correctly sized and positioned when the resize event e 出现。
[signal]
void
Q3ListView::
returnPressed
(
Q3ListViewItem
*
item
)
This signal is emitted when Enter or Return is pressed. The item parameter is the currentItem ().
[signal]
void
Q3ListView::
rightButtonClicked
(
Q3ListViewItem
*
item
, const
QPoint
&
point
,
int
column
)
This signal is emitted when the right button is clicked. The item 是 Q3ListViewItem the button was clicked on (which could be 0 if it wasn't clicked on an item). The point where the click occurred is given in global coordinates. If an item was clicked on, column is the column within the item that was clicked; otherwise column 为 -1。
[signal]
void
Q3ListView::
rightButtonPressed
(
Q3ListViewItem
*
item
, const
QPoint
&
point
,
int
column
)
This signal is emitted when the right button is pressed. The item 是 Q3ListViewItem the button was pressed on (which could be 0 if it wasn't pressed on an item). The point where the press occurred is given in global coordinates. If an item was pressed on, column is the column within the item that was pressed; otherwise column 为 -1。
[virtual slot]
void
Q3ListView::
selectAll
(
bool
select
)
若
select
is true, all the items get selected; otherwise all the items get unselected. This only works in the selection modes
Multi
and
Extended
。在
Single
and
NoSelection
mode the selection of the current item is just set to
select
.
Returns the selected item if the list view is in
Single
selection mode and an item is selected.
If no items are selected or the list view is not in
Single
selection mode this function returns 0.
另请参阅 setSelected () 和 setMultiSelection ().
[signal]
void
Q3ListView::
selectionChanged
()
This signal is emitted whenever the set of selected items has changed (normally before the screen update). It is available both in
Single
selection and
Multi
selection mode but is most useful in
Multi
selection mode.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
注意： 信号 selectionChanged 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)()>(&Q3ListView::selectionChanged), [=](){ /* ... */ });
另请参阅 setSelected () 和 Q3ListViewItem::setSelected ().
[signal]
void
Q3ListView::
selectionChanged
(
Q3ListViewItem
*
item
)
这是重载函数。
This signal is emitted whenever the selected item has changed in
Single
selection mode (normally after the screen update). The argument is the newly selected
item
.
在
Multi
selection mode, use the no argument overload of this signal.
警告： Do not delete any Q3ListViewItem objects in slots connected to this signal.
注意： 信号 selectionChanged 在此类中是重载。要使用函数指针句法连接到此信号，必须在静态铸造中指定信号类型，如此范例所示：
connect(3ListView, static_cast<void(Q3ListView::*)(Q3ListViewItem *)>(&Q3ListView::selectionChanged), [=](Q3ListViewItem *item){ /* ... */ });
另请参阅 setSelected (), Q3ListViewItem::setSelected ()，和 currentChanged ().
[虚拟]
void
Q3ListView::
setColumnAlignment
(
int
column
,
int
align
)
Sets column column 's alignment to align . The alignment is ultimately passed to Q3ListViewItem::paintCell () for each item in the list view. For horizontally aligned text with Qt::AlignLeft or Qt::AlignHCenter the ellipsis (...) will be to the right, for Qt::AlignRight the ellipsis will be to the left.
另请参阅 columnAlignment () 和 Qt::Alignment .
[虚拟]
void
Q3ListView::
setColumnText
(
int
column
, const
QString
&
label
)
Sets the heading of column column to label .
另请参阅 columnText ().
[虚拟]
void
Q3ListView::
setColumnText
(
int
column
, const
QIcon
&
icon
, const
QString
&
label
)
这是重载函数。
Sets the heading of column column to icon and label .
另请参阅 columnText ().
[虚拟]
void
Q3ListView::
setColumnWidth
(
int
column
,
int
w
)
Sets the width of column
column
to
w
pixels. Note that if the column has a
WidthMode
other than
Manual
, this width setting may be subsequently overridden.
另请参阅 columnWidth ().
[虚拟]
void
Q3ListView::
setColumnWidthMode
(
int
c
,
WidthMode
mode
)
Sets column c 's width mode to mode . The default depends on the original width argument to addColumn ().
另请参阅 columnWidthMode () 和 Q3ListViewItem::width ().
[virtual slot]
void
Q3ListView::
setContentsPos
(
int
x
,
int
y
)
重实现自 Q3ScrollView::setContentsPos ().
[虚拟]
void
Q3ListView::
setCurrentItem
(
Q3ListViewItem
*
i
)
Sets item i to be the current item and repaints appropriately (i.e. highlights the item). The current item is used for keyboard navigation and focus indication; it is independent of any selected items, although a selected item can also be the current item.
另请参阅 currentItem () 和 setSelected ().
[虚拟]
void
Q3ListView::
setOpen
(
Q3ListViewItem
*
item
,
bool
open
)
集 item to be open if open is true and item is expandable, and to be closed if open is false. Repaints accordingly.
另请参阅 isOpen (), Q3ListViewItem::setOpen ()，和 Q3ListViewItem::setExpandable ().
[虚拟]
void
Q3ListView::
setSelected
(
Q3ListViewItem
*
item
,
bool
selected
)
若 selected 为 true item is selected; otherwise it is unselected.
If the list view is in
Single
selection mode and
selected
is true, the currently selected item is unselected and
item
is made current. Unlike
Q3ListViewItem::setSelected
(), this function updates the list view as necessary and emits the
selectionChanged
() 信号。
setCurrentItem (), setSelectionAnchor ()
另请参阅 isSelected (), setMultiSelection ()，和 isMultiSelection ().
Sets the selection anchor to item ，若 item is selectable.
The selection anchor is the item that remains selected when Shift-selecting with either mouse or keyboard in
Extended
selection mode.
另请参阅 setSelected ().
Sets the sorting column for the list view.
若 column is -1, sorting is disabled and the user cannot sort columns by clicking on the column headers. If column is larger than the number of columns the user must click on a column header to sort the list view.
另请参阅 sortColumn () 和 setSorting ().
Sets the sort order for the items in the list view to order .
另请参阅 sortOrder () 和 setSorting ().
[虚拟]
void
Q3ListView::
setSorting
(
int
column
,
bool
ascending
= true)
Sets the list view to be sorted by column column in ascending order if ascending is true or descending order if it is false.
若 column is -1, sorting is disabled and the user cannot sort columns by clicking on the column headers. If column is larger than the number of columns the user must click on a column header to sort the list view.
[virtual protected]
void
Q3ListView::
showEvent
(
QShowEvent
*)
重实现自 QWidget::showEvent ().
[虚拟]
QSize
Q3ListView::
sizeHint
() const
重实现自 QWidget::sizeHint ().
[虚拟]
void
Q3ListView::
sort
()
Sorts the list view using the last sorting configuration (sort column and ascending/descending).
Returns the column by which the list view is sorted, or -1 if sorting is disabled.
另请参阅 setSortColumn () 和 sortOrder ().
Returns the sorting order of the list view items.
另请参阅 setSortOrder () 和 sortColumn ().
[signal]
void
Q3ListView::
spacePressed
(
Q3ListViewItem
*
item
)
This signal is emitted when Space is pressed. The item parameter is the currentItem ().
[virtual protected]
void
Q3ListView::
startDrag
()
Starts a drag.
[虚拟]
void
Q3ListView::
takeItem
(
Q3ListViewItem
*
i
)
Removes item i from the list view; i must be a top-level item. The warnings regarding Q3ListViewItem::takeItem () apply to this function, too.
另请参阅 insertItem ().
[slot]
void
Q3ListView::
triggerUpdate
()
Triggers a size, geometry and content update during the next iteration of the event loop. Ensures that there'll be just one update to avoid flicker.
[protected slot]
void
Q3ListView::
updateContents
()
Updates the sizes of the viewport, header, scroll bars and so on.
警告： Don't call this directly; call triggerUpdate () 代替。
[virtual protected]
void
Q3ListView::
viewportResizeEvent
(
QResizeEvent
*
e
)
重实现自 Q3ScrollView::viewportResizeEvent ().