|
Eneboo - Documentación para desarrolladores
|
|
Eneboo - Documentación para desarrolladores
|
The QListView class implements a list/tree view. Más...
#include <qlistview.h>
The QListView 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 QListView, add some column headers using addColumn() and create one or more QListViewItem or QCheckListItem objects with the QListView as parent:
xml/tagreader-with-features/structureparser.h QListView * table xml/tagreader-with-features/structureparser.cpp addColumn addColumn new QListViewItem( table
Further nodes can be added to the list view object (the root of the tree) or as child nodes to QListViewItems:
for ( int i = 0 ; i < attributes.length(); }
(From xml/tagreader-with-features/structureparser.cpp)
The main setup functions are: Function Action 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 should show 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).
To handle events such as mouse presses on the list view, derived classes can reimplement the QScrollView functions: contentsMousePressEvent, contentsMouseReleaseEvent, contentsMouseDoubleClickEvent, contentsMouseMoveEvent, contentsDragEnterEvent, contentsDragMoveEvent, contentsDragLeaveEvent, contentsDropEvent, and contentsWheelEvent.
There are also 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 QListViewItem::itemBelow(); over a list view's top-level items using QListViewItem::firstChild() and QListViewItem::nextSibling(); or every item using a QListViewItemIterator. See the QListViewItem documentation for examples of traversal.
An item can be moved amongst its siblings using QListViewItem::moveItem(). To move an item in the hierarchy use takeItem() and 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 QListView::SelectionMode documentation. The default is Single selection, which you can change using setSelectionMode().
Because QListView 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()).
QListView 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(QListViewItem*) (applicable only to a Single selection list view), and currentChanged(QListViewItem*). The second group consists of doubleClicked(QListViewItem*), returnPressed(QListViewItem*), rightButtonClicked(QListViewItem*, 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, QListView 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.
If selectionMode() is Single (the default) the user can select one item at a time, e.g. by clicking an item with the mouse, see QListView::SelectionMode for details.
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: Keypress Action 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 scrollbar 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.
This enum describes whether a rename operation is accepted if the rename editor loses focus without the user pressing Enter.
Accept Rename if Enter is pressed or focus is lost.
Reject 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.
NoColumn The columns do not get resized in resize events.
AllColumns All columns are resized equally to fit the width of the list view.
LastColumn The last column is resized to fit the width of the list view.
This enumerated type is used by QListView to indicate how it reacts to selection by the user.
Single When the user selects an item, any already-selected item becomes unselected. The user can unselect the selected item by clicking on some empty space within the view.
Multi 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. Also, multiple items can be selected by dragging the mouse while the left mouse button stays pressed.
Extended 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.
NoSelection Items cannot be selected.
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.
| enum QListView::WidthMode |
This enum type describes how the width of a column in the view changes.
Manual the column width does not change automatically.
Maximum 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.
| enum QListView::WidthMode |
Constructs a new empty list view called name with parent parent.
Performance is boosted by modifying the widget flags f so that only part of the QListViewItem children is redrawn. This may be unsuitable for custom QListViewItem classes, in which case WStaticContents and WNoAutoErase should be cleared.
| QListView::~QListView | ( | ) |
Destroys the list view, deleting all its items, and frees up all allocated resources.
| QListView::~QListView | ( | ) |
Adds a 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.
If width is negative, the new column's WidthMode is set to Maximum instead of Manual.
| int QListView::addColumn | ( | const QIconSet & | iconset, |
| const QString & | label, | ||
| int | width = -1 |
||
| ) | [virtual] |
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Adds a width pixels wide new column with the header label and the iconset to the list view, and returns the index of the column.
If width is negative, the new column's WidthMode is set to Maximum, and to Manual otherwise.
| virtual int QListView::addColumn | ( | const QIconSet & | iconset, |
| const QString & | label, | ||
| int | size = -1 |
||
| ) | [virtual] |
| void QListView::adjustColumn | ( | int | col | ) | [slot] |
Adjusts the column col to its preferred width
| void QListView::adjustColumn | ( | int | col | ) | [slot] |
| bool QListView::allColumnsShowFocus | ( | ) | const |
| bool QListView::allColumnsShowFocus | ( | ) | const |
| int QListView::childCount | ( | ) | const |
| int QListView::childCount | ( | ) | const |
| void QListView::clear | ( | void | ) | [virtual, slot] |
Removes and deletes all the items in this list view and triggers an update.
Note that the currentChanged() signal is not emitted when this slot is invoked.
Reimplementado en QFileDialogQFileListView.
| virtual void QListView::clear | ( | ) | [virtual, slot] |
Reimplementado en QFileDialogQFileListView.
| virtual void QListView::clearSelection | ( | ) | [virtual] |
| void QListView::clearSelection | ( | ) | [virtual] |
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 items.
| void QListView::clicked | ( | QListViewItem * | item | ) | [signal] |
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.
| void QListView::clicked | ( | QListViewItem * | item, |
| const QPoint & | pnt, | ||
| int | c | ||
| ) | [signal] |
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. 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.
| void QListView::clicked | ( | QListViewItem * | ) | [signal] |
| void QListView::clicked | ( | QListViewItem * | , |
| const QPoint & | , | ||
| int | |||
| ) | [signal] |
| void QListView::collapsed | ( | QListViewItem * | item | ) | [signal] |
This signal is emitted when the item has been collapsed, i.e. when the children of item are hidden.
| void QListView::collapsed | ( | QListViewItem * | item | ) | [signal] |
Returns the alignment of column column. The default is AlignAuto.
| int QListView::columns | ( | ) | const |
| int QListView::columns | ( | ) | const |
Returns the text of column c.
Returns the width of column c.
| QListView::WidthMode QListView::columnWidthMode | ( | int | c | ) | const |
Returns the WidthMode for column c.
| void QListView::contentsContextMenuEvent | ( | QContextMenuEvent * | e | ) | [protected, virtual] |
Reimplementado de QScrollView.
| void QListView::contentsContextMenuEvent | ( | QContextMenuEvent * | e | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a contextMenuEvent() in {e}: the mouse position is translated to be a point on the contents.
Reimplementado de QScrollView.
| void QListView::contentsDragEnterEvent | ( | QDragEnterEvent * | e | ) | [protected, virtual] |
Reimplementado de QScrollView.
Reimplementado en Workspace.
| void QListView::contentsDragEnterEvent | ( | QDragEnterEvent * | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a dragEnterEvent(): the drag position is translated to be a point on the contents.
Reimplementado de QScrollView.
Reimplementado en Workspace.
| void QListView::contentsDragLeaveEvent | ( | QDragLeaveEvent * | e | ) | [protected, virtual] |
Reimplementado de QScrollView.
| void QListView::contentsDragLeaveEvent | ( | QDragLeaveEvent * | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a dragLeaveEvent(): the drag position is translated to be a point on the contents.
Reimplementado de QScrollView.
| void QListView::contentsDragMoveEvent | ( | QDragMoveEvent * | e | ) | [protected, virtual] |
Reimplementado de QScrollView.
Reimplementado en Workspace.
| void QListView::contentsDragMoveEvent | ( | QDragMoveEvent * | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a dragMoveEvent(): the drag position is translated to be a point on the contents.
Reimplementado de QScrollView.
Reimplementado en Workspace.
| void QListView::contentsDropEvent | ( | QDropEvent * | e | ) | [protected, virtual] |
Reimplementado de QScrollView.
Reimplementado en Workspace.
| void QListView::contentsDropEvent | ( | QDropEvent * | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a dropEvent(): the drop position is translated to be a point on the contents.
Reimplementado de QScrollView.
Reimplementado en Workspace.
| void QListView::contentsMouseDoubleClickEvent | ( | QMouseEvent * | e | ) | [protected, virtual] |
Processes the mouse double-click event e on behalf of the viewed widget.
Reimplementado de QScrollView.
Reimplementado en FormDefinitionView y EventList.
| void QListView::contentsMouseDoubleClickEvent | ( | QMouseEvent * | e | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a mouseDoubleClickEvent(): the click position in e is translated to be a point on the contents.
The default implementation generates a normal mouse press event.
Reimplementado de QScrollView.
Reimplementado en FormDefinitionView y EventList.
| void QListView::contentsMouseMoveEvent | ( | QMouseEvent * | e | ) | [protected, virtual] |
Processes the mouse move event e on behalf of the viewed widget.
Reimplementado de QScrollView.
| void QListView::contentsMouseMoveEvent | ( | QMouseEvent * | e | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a mouseMoveEvent(): the mouse position in e is translated to be a point on the contents.
Reimplementado de QScrollView.
| void QListView::contentsMousePressEvent | ( | QMouseEvent * | e | ) | [protected, virtual] |
Processes the mouse press event e on behalf of the viewed widget.
Reimplementado de QScrollView.
| void QListView::contentsMousePressEvent | ( | QMouseEvent * | e | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a mousePressEvent(): the press position in e is translated to be a point on the contents.
Reimplementado de QScrollView.
| void QListView::contentsMouseReleaseEvent | ( | QMouseEvent * | e | ) | [protected, virtual] |
Processes the mouse release event e on behalf of the viewed widget.
Reimplementado de QScrollView.
| void QListView::contentsMouseReleaseEvent | ( | QMouseEvent * | e | ) | [protected, virtual] |
This event handler is called whenever the QScrollView receives a mouseReleaseEvent(): the release position in e is translated to be a point on the contents.
Reimplementado de QScrollView.
| void QListView::contextMenuRequested | ( | QListViewItem * | item, |
| const QPoint & | pos, | ||
| int | col | ||
| ) | [signal] |
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.
| void QListView::contextMenuRequested | ( | QListViewItem * | , |
| const QPoint & | , | ||
| int | |||
| ) | [signal] |
| void QListView::currentChanged | ( | QListViewItem * | t0 | ) | [signal] |
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 items in the list view are deleted.
| void QListView::currentChanged | ( | QListViewItem * | ) | [signal] |
| QListViewItem * QListView::currentItem | ( | ) | const |
Returns the current item, or 0 if there isn't one.
| QListViewItem* QListView::currentItem | ( | ) | const |
| RenameAction QListView::defaultRenameAction | ( | ) | const |
| RenameAction QListView::defaultRenameAction | ( | ) | const |
| void QListView::doAutoScroll | ( | ) | [protected, slot] |
This slot handles auto-scrolling when the mouse button is pressed and the mouse is outside the widget.
| void QListView::doAutoScroll | ( | ) | [protected, slot] |
| void QListView::doubleClicked | ( | QListViewItem * | item | ) | [signal] |
(use doubleClicked( QListViewItem *, const QPoint&, int ))
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.
| void QListView::doubleClicked | ( | QListViewItem * | t0, |
| const QPoint & | t1, | ||
| int | t2 | ||
| ) | [signal] |
This signal is emitted whenever an item is double-clicked. It's emitted on the second button press, not the second button release. The arguments are the relevant QListViewItem (may be 0), the point in global coordinates and the relevant column (or -1 if the click was outside the list).
| void QListView::doubleClicked | ( | QListViewItem * | ) | [signal] |
| void QListView::doubleClicked | ( | QListViewItem * | , |
| const QPoint & | , | ||
| int | |||
| ) | [signal] |
| QDragObject * QListView::dragObject | ( | ) | [protected, virtual] |
If the user presses the mouse on an item and starts moving the mouse, and the item allow dragging (see QListViewItem::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 QDragObject depending on the selected items.
Reimplementado en ActionListView.
| virtual QDragObject* QListView::dragObject | ( | ) | [protected, virtual] |
Reimplementado en ActionListView.
| void QListView::drawContentsOffset | ( | QPainter * | p, |
| int | ox, | ||
| int | oy, | ||
| int | cx, | ||
| int | cy, | ||
| int | cw, | ||
| int | ch | ||
| ) | [protected, virtual] |
Calls QListViewItem::paintCell() and QListViewItem::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.
Reimplementado de QScrollView.
Reimplementado en HierarchyList.
| void QListView::drawContentsOffset | ( | QPainter * | p, |
| int | offsetx, | ||
| int | offsety, | ||
| int | clipx, | ||
| int | clipy, | ||
| int | clipw, | ||
| int | cliph | ||
| ) | [protected, virtual] |
For backward-compatibility only. It is easier to use drawContents(QPainter*,int,int,int,int).
The default implementation translates the painter appropriately and calls drawContents(QPainter*,int,int,int,int). See drawContents() for an explanation of the parameters p, offsetx, offsety, clipx, clipy, clipw and cliph.
Reimplementado de QScrollView.
Reimplementado en HierarchyList.
| void QListView::dropped | ( | QDropEvent * | e | ) | [signal] |
This signal is emitted, when a drop event occurred on the viewport (not onto an item).
e provides all the information about the drop.
| void QListView::dropped | ( | QDropEvent * | e | ) | [signal] |
| void QListView::ensureItemVisible | ( | const QListViewItem * | ) |
| void QListView::ensureItemVisible | ( | const QListViewItem * | i | ) |
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.
This event filter ensures the scroll bars are updated when a single contents widget is resized, shown, hidden or destroyed; it passes mouse events to the QScrollView. The event is in e and the object is in obj.
Reimplementado de QScrollView.
Reimplementado en Workspace.
Redirects the event e relating to object o, for the viewport to mousePressEvent(), keyPressEvent() and friends.
Reimplementado de QScrollView.
Reimplementado en Workspace.
| void QListView::expanded | ( | QListViewItem * | item | ) | [signal] |
This signal is emitted when item has been expanded, i.e. when the children of item are shown.
| void QListView::expanded | ( | QListViewItem * | item | ) | [signal] |
| QListViewItem * QListView::findItem | ( | const QString & | text, |
| int | column, | ||
| ComparisonFlags | compare = ExactMatch | CaseSensitive |
||
| ) | const |
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. The search starts from the current item if the current item exists, otherwise it starts from the first list view item. After reaching the last item the search continues from the first item. Pass OR-ed together Qt::StringComparisonMode values in the compare flag, to control how the matching is performed. The default comparison mode is case-sensitive, exact match.
| QListViewItem* QListView::findItem | ( | const QString & | text, |
| int | column, | ||
| ComparisonFlags | compare = ExactMatch|CaseSensitive |
||
| ) | const |
| QListViewItem * QListView::firstChild | ( | ) | const |
Returns the first item in this QListView. Returns 0 if there is no first item.
A list view's items can be traversed using firstChild() and nextSibling() or using a QListViewItemIterator.
| QListViewItem* QListView::firstChild | ( | ) | const |
| void QListView::focusInEvent | ( | QFocusEvent * | e | ) | [protected, virtual] |
Reimplementado de QWidget.
| void QListView::focusInEvent | ( | QFocusEvent * | ) | [protected, virtual] |
This event handler can be reimplemented in a subclass to receive keyboard focus events (focus received) for the widget.
A widget normally must setFocusPolicy() to something other than NoFocus in order to receive focus events. (Note that the application programmer can call setFocus() on any widget, even those that do not normally accept focus.)
The default implementation updates the widget (except for toplevel widgets that do not specify a focusPolicy() ). It also calls setMicroFocusHint(), hinting any system-specific input tools about the focus of the user's attention.
Reimplementado de QWidget.
| void QListView::focusOutEvent | ( | QFocusEvent * | e | ) | [protected, virtual] |
Reimplementado de QWidget.
| void QListView::focusOutEvent | ( | QFocusEvent * | ) | [protected, virtual] |
This event handler can be reimplemented in a subclass to receive keyboard focus events (focus lost) for the widget.
A widget normally must setFocusPolicy() to something other than NoFocus in order to receive focus events. (Note that the application programmer can call setFocus() on any widget, even those that do not normally accept focus.)
The default implementation updates the widget (except for toplevel widgets that do not specify a focusPolicy() ). It also calls setMicroFocusHint(), hinting any system-specific input tools about the focus of the user's attention.
Reimplementado de QWidget.
| QHeader * QListView::header | ( | ) | const |
Returns the QHeader object that manages this list view's columns. Please don't modify the header behind the list view's back.
You may safely call QHeader::setClickEnabled(), QHeader::setResizeEnabled(), QHeader::setMovingEnabled(), QHeader::hide() and all the const QHeader functions.
| QHeader* QListView::header | ( | ) | const |
| void QListView::hideColumn | ( | int | column | ) |
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.
| void QListView::hideColumn | ( | int | column | ) |
| void QListView::insertItem | ( | QListViewItem * | i | ) | [virtual] |
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) or QListViewItem::takeItem(i) and need to reinsert i elsewhere.
| virtual void QListView::insertItem | ( | QListViewItem * | ) | [virtual] |
| void QListView::invertSelection | ( | ) | [virtual, slot] |
Inverts the selection. Only works in Multi and Extended selection modes.
| virtual void QListView::invertSelection | ( | ) | [virtual, slot] |
| bool QListView::isMultiSelection | ( | ) | const |
| bool QListView::isMultiSelection | ( | ) | const |
| bool QListView::isOpen | ( | const QListViewItem * | item | ) | const |
| bool QListView::isOpen | ( | const QListViewItem * | ) | const |
| bool QListView::isRenaming | ( | ) | const |
Returns TRUE if an item is being renamed; otherwise returns FALSE.
| bool QListView::isRenaming | ( | ) | const |
| bool QListView::isSelected | ( | const QListViewItem * | i | ) | const |
Returns TRUE if the list view item i is selected; otherwise returns FALSE.
| bool QListView::isSelected | ( | const QListViewItem * | ) | const |
| QListViewItem* QListView::itemAt | ( | const QPoint & | screenPos | ) | const |
| QListViewItem * QListView::itemAt | ( | const QPoint & | viewPos | ) | const |
Returns the list view item at viewPos. Note that 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:
QListViewItem *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).
| int QListView::itemMargin | ( | ) | const |
| int QListView::itemMargin | ( | ) | const |
| int QListView::itemPos | ( | const QListViewItem * | ) |
| int QListView::itemPos | ( | const QListViewItem * | item | ) |
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 QListViewItem::itemPos().
| QRect QListView::itemRect | ( | const QListViewItem * | ) | const |
| QRect QListView::itemRect | ( | const QListViewItem * | i | ) | const |
Returns the rectangle on the screen that item i occupies in viewport()'s coordinates, or an invalid rectangle if i is 0 or is not currently visible.
The rectangle returned does not include any children of the rectangle (i.e. it uses QListViewItem::height(), rather than QListViewItem::totalHeight()). If you want the rectangle to include children you can use something like this:
QRect r( listView->itemRect( item ) ); r.setHeight( (QCOORD)(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.
| void QListView::itemRenamed | ( | QListViewItem * | item, |
| int | col | ||
| ) | [signal] |
| void QListView::itemRenamed | ( | QListViewItem * | item, |
| int | col, | ||
| const QString & | text | ||
| ) | [signal] |
This signal is emitted when item has been renamed to text, e.g. by in in-place renaming, in column col.
| void QListView::itemRenamed | ( | QListViewItem * | item, |
| int | col | ||
| ) | [signal] |
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. This signal is emitted when item has been renamed, e.g. by in-place renaming, in column col.
| void QListView::itemRenamed | ( | QListViewItem * | item, |
| int | col, | ||
| const QString & | |||
| ) | [signal] |
| void QListView::keyPressEvent | ( | QKeyEvent * | e | ) | [protected, virtual] |
Reimplementado de QWidget.
Reimplementado en HierarchyList.
| void QListView::keyPressEvent | ( | QKeyEvent * | e | ) | [protected, virtual] |
This event handler, for event e, can be reimplemented in a subclass to receive key press events for the widget.
A widget must call setFocusPolicy() to accept focus initially and have focus in order to receive a key press event.
If you reimplement this handler, it is very important that you explicitly ignore the event if you do not understand it, so that the widget's parent can interpret it; otherwise, the event will be implicitly accepted. Although top-level widgets are able to choose whether to accept or ignore unknown events because they have no parent widgets that could otherwise handle them, it is good practice to explicitly ignore events to make widgets as reusable as possible.
The default implementation closes popup widgets if the user presses Esc. Otherwise the event is ignored.
Reimplementado de QWidget.
Reimplementado en HierarchyList.
| QListViewItem * QListView::lastItem | ( | ) | const |
Returns the last item in the list view tree. Returns 0 if there are no items in the QListView.
This function is slow because it traverses the entire tree to find the last item.
| QListViewItem* QListView::lastItem | ( | ) | const |
| QSize QListView::minimumSizeHint | ( | ) | const [virtual] |
Reimplementado de QScrollView.
| QSize QListView::minimumSizeHint | ( | ) | const [virtual] |
Reimplementado de QScrollView.
| void QListView::mouseButtonClicked | ( | int | button, |
| QListViewItem * | item, | ||
| const QPoint & | pos, | ||
| int | c | ||
| ) | [signal] |
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.
| void QListView::mouseButtonClicked | ( | int | , |
| QListViewItem * | , | ||
| const QPoint & | , | ||
| int | |||
| ) | [signal] |
| void QListView::mouseButtonPressed | ( | int | button, |
| QListViewItem * | item, | ||
| const QPoint & | pos, | ||
| int | c | ||
| ) | [signal] |
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.
| void QListView::mouseButtonPressed | ( | int | , |
| QListViewItem * | , | ||
| const QPoint & | , | ||
| int | |||
| ) | [signal] |
| void QListView::onItem | ( | QListViewItem * | i | ) | [signal] |
This signal is emitted when the user moves the mouse cursor onto item i, similar to the QWidget::enterEvent() function.
| void QListView::onItem | ( | QListViewItem * | item | ) | [signal] |
| void QListView::onViewport | ( | ) | [signal] |
| void QListView::onViewport | ( | ) | [signal] |
This signal is emitted when the user moves the mouse cursor from an item to an empty part of the list view.
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 with the viewport()->backgroundBrush().
Reimplementado en PropertyList.
Reimplementado en PropertyList.
| void QListView::pressed | ( | QListViewItem * | item | ) | [signal] |
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.
| void QListView::pressed | ( | QListViewItem * | item, |
| const QPoint & | pnt, | ||
| int | c | ||
| ) | [signal] |
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. 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.
| void QListView::pressed | ( | QListViewItem * | ) | [signal] |
| void QListView::pressed | ( | QListViewItem * | , |
| const QPoint & | , | ||
| int | |||
| ) | [signal] |
| virtual void QListView::removeColumn | ( | int | index | ) | [virtual] |
| void QListView::removeColumn | ( | int | index | ) | [virtual] |
Removes the column at position index.
If no columns remain after the column is removed, the list view will be cleared.
| void QListView::removeItem | ( | QListViewItem * | item | ) | [inline, virtual] |
This function has been renamed takeItem().
| virtual void QListView::removeItem | ( | QListViewItem * | item | ) | [inline, virtual] |
| void QListView::repaintItem | ( | const QListViewItem * | ) | const |
| void QListView::repaintItem | ( | const QListViewItem * | item | ) | const |
Repaints item on the screen if item is currently visible. Takes care to avoid multiple repaints.
| void QListView::resizeEvent | ( | QResizeEvent * | event | ) | [protected, virtual] |
Reimplementado de QScrollView.
Reimplementado en PropertyList.
| void QListView::resizeEvent | ( | QResizeEvent * | e | ) | [protected, virtual] |
Ensures that the header is correctly sized and positioned when the resize event e occurs.
Reimplementado de QScrollView.
Reimplementado en PropertyList.
| ResizeMode QListView::resizeMode | ( | ) | const |
| ResizeMode QListView::resizeMode | ( | ) | const |
| void QListView::returnPressed | ( | QListViewItem * | t0 | ) | [signal] |
This signal is emitted when Enter or Return is pressed. The argument is the currentItem().
| void QListView::returnPressed | ( | QListViewItem * | ) | [signal] |
| void QListView::rightButtonClicked | ( | QListViewItem * | t0, |
| const QPoint & | t1, | ||
| int | t2 | ||
| ) | [signal] |
This signal is emitted when the right button is clicked (i.e. when it's released). The arguments are the relevant QListViewItem (may be 0), the point in global coordinates and the relevant column (or -1 if the click was outside the list).
| void QListView::rightButtonClicked | ( | QListViewItem * | , |
| const QPoint & | , | ||
| int | |||
| ) | [signal] |
| void QListView::rightButtonPressed | ( | QListViewItem * | t0, |
| const QPoint & | t1, | ||
| int | t2 | ||
| ) | [signal] |
This signal is emitted when the right button is pressed. The arguments are the relevant QListViewItem (may be 0), the point in global coordinates and the relevant column (or -1 if the click was outside the list).
| void QListView::rightButtonPressed | ( | QListViewItem * | , |
| const QPoint & | , | ||
| int | |||
| ) | [signal] |
| bool QListView::rootIsDecorated | ( | ) | const |
| bool QListView::rootIsDecorated | ( | ) | const |
| void QListView::selectAll | ( | bool | select | ) | [virtual, slot] |
If select is TRUE, all the items get selected; otherwise all the items get unselected. This only works in the selection modes Multi and Extended. In Single and NoSelection mode the selection of the current item is just set to select.
| virtual void QListView::selectAll | ( | bool | select | ) | [virtual, slot] |
| QListViewItem * QListView::selectedItem | ( | ) | const |
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.
| QListViewItem* QListView::selectedItem | ( | ) | const |
| void QListView::selectionChanged | ( | ) | [signal] |
This signal is emitted whenever the set of selected items has changed (normally before the screen update). It is available in Single, Multi, and Extended selection modes, but is most useful in Multi selection mode.
| void QListView::selectionChanged | ( | QListViewItem * | t0 | ) | [signal] |
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. 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. If the selection is cleared (when, for example, the user clicks in the unused area of the list view) then this signal will not be emitted.
In Multi selection mode, use the no argument overload of this signal.
| void QListView::selectionChanged | ( | QListViewItem * | ) | [signal] |
| void QListView::selectionChanged | ( | ) | [signal] |
| SelectionMode QListView::selectionMode | ( | ) | const |
| SelectionMode QListView::selectionMode | ( | ) | const |
| virtual void QListView::setAllColumnsShowFocus | ( | bool | ) | [virtual] |
| void QListView::setAllColumnsShowFocus | ( | bool | enable | ) | [virtual] |
Sets column {column}'s alignment to align. The alignment is ultimately passed to QListViewItem::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.
| virtual void QListView::setColumnText | ( | int | column, |
| const QIconSet & | iconset, | ||
| const QString & | label | ||
| ) | [virtual] |
Sets the heading of column column to label.
| void QListView::setColumnText | ( | int | column, |
| const QIconSet & | iconset, | ||
| const QString & | label | ||
| ) | [virtual] |
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Sets the heading of column column to iconset and label.
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.
Sets column {c}'s width mode to mode. The default depends on the original width argument to addColumn().
Reimplementado de QScrollView.
Scrolls the content so that the point (x, y) is in the top-left corner.
Reimplementado de QScrollView.
| void QListView::setCurrentItem | ( | QListViewItem * | i | ) | [virtual] |
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.
This function does not set the selection anchor. Use setSelectionAnchor() instead.
Reimplementado en PropertyList.
| virtual void QListView::setCurrentItem | ( | QListViewItem * | ) | [virtual] |
Reimplementado en PropertyList.
| void QListView::setDefaultRenameAction | ( | RenameAction | a | ) | [virtual] |
| virtual void QListView::setDefaultRenameAction | ( | RenameAction | a | ) | [virtual] |
| virtual void QListView::setItemMargin | ( | int | ) | [virtual] |
| void QListView::setItemMargin | ( | int | m | ) | [virtual] |
| virtual void QListView::setMultiSelection | ( | bool | enable | ) | [virtual] |
| void QListView::setMultiSelection | ( | bool | enable | ) | [virtual] |
| void QListView::setOpen | ( | QListViewItem * | item, |
| bool | open | ||
| ) | [virtual] |
Sets item to be open if open is TRUE and item is expandable, and to be closed if open is FALSE. Repaints accordingly.
Reimplementado en HierarchyList.
| virtual void QListView::setOpen | ( | QListViewItem * | , |
| bool | |||
| ) | [virtual] |
Reimplementado en HierarchyList.
| virtual void QListView::setResizeMode | ( | ResizeMode | m | ) | [virtual] |
| void QListView::setResizeMode | ( | ResizeMode | m | ) | [virtual] |
| virtual void QListView::setRootIsDecorated | ( | bool | ) | [virtual] |
| void QListView::setRootIsDecorated | ( | bool | enable | ) | [virtual] |
| virtual void QListView::setSelected | ( | QListViewItem * | , |
| bool | |||
| ) | [virtual] |
| void QListView::setSelected | ( | QListViewItem * | item, |
| bool | selected | ||
| ) | [virtual] |
If selected is TRUE the 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 QListViewItem::setSelected(), this function updates the list view as necessary and emits the selectionChanged() signals.
| void QListView::setSelectionAnchor | ( | QListViewItem * | ) |
| void QListView::setSelectionAnchor | ( | QListViewItem * | item | ) |
Sets the selection anchor to item, if item is selectable.
The selection anchor is the item that remains selected when Shift-selecting with either mouse or keyboard in Extended selection mode.
| void QListView::setSelectionMode | ( | SelectionMode | mode | ) |
| void QListView::setSelectionMode | ( | SelectionMode | mode | ) |
| virtual void QListView::setShowSortIndicator | ( | bool | show | ) | [virtual] |
| void QListView::setShowSortIndicator | ( | bool | show | ) | [virtual] |
| void QListView::setShowToolTips | ( | bool | b | ) | [virtual] |
| virtual void QListView::setShowToolTips | ( | bool | b | ) | [virtual] |
| void QListView::setSortColumn | ( | int | column | ) |
| void QListView::setSortColumn | ( | int | column | ) |
Sets the sorting column for the list view.
If 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.
Reimplementado en QFileDialogQFileListView.
Sets the list view to be sorted by column column in ascending order if ascending is TRUE or descending order if it is FALSE.
If 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.
Reimplementado en QFileDialogQFileListView.
| void QListView::setSortOrder | ( | SortOrder | order | ) |
| void QListView::setSortOrder | ( | SortOrder | order | ) |
Sets the sort order for the items in the list view to order.
| void QListView::setTreeStepSize | ( | int | size | ) | [virtual] |
| virtual void QListView::setTreeStepSize | ( | int | ) | [virtual] |
| void QListView::show | ( | ) | [virtual] |
Reimplementado de QScrollView.
| void QListView::show | ( | ) | [virtual] |
Reimplementado de QScrollView.
| void QListView::showEvent | ( | QShowEvent * | ) | [protected, virtual] |
Reimplementado de QWidget.
| void QListView::showEvent | ( | QShowEvent * | ) | [protected, virtual] |
This event handler can be reimplemented in a subclass to receive widget show events.
Non-spontaneous show events are sent to widgets immediately before they are shown. The spontaneous show events of top-level widgets are delivered afterwards.
Reimplementado de QWidget.
| bool QListView::showSortIndicator | ( | ) | const |
| bool QListView::showSortIndicator | ( | ) | const |
| bool QListView::showToolTips | ( | ) | const |
| bool QListView::showToolTips | ( | ) | const |
| QSize QListView::sizeHint | ( | ) | const [virtual] |
Reimplementado de QScrollView.
Reimplementado en PhraseLV.
| QSize QListView::sizeHint | ( | ) | const [virtual] |
Reimplementado de QScrollView.
Reimplementado en PhraseLV.
| virtual void QListView::sort | ( | ) | [virtual] |
| void QListView::sort | ( | ) | [virtual] |
Sorts the list view using the last sorting configuration (sort column and ascending/descending).
| int QListView::sortColumn | ( | ) | const |
| int QListView::sortColumn | ( | ) | const |
Returns the column by which the list view is sorted, or -1 if sorting is disabled.
| SortOrder QListView::sortOrder | ( | ) | const |
| Qt::SortOrder QListView::sortOrder | ( | ) | const |
Returns the sorting order of the list view items.
| void QListView::spacePressed | ( | QListViewItem * | ) | [signal] |
| void QListView::spacePressed | ( | QListViewItem * | t0 | ) | [signal] |
This signal is emitted when Space is pressed. The argument is the currentItem().
| virtual void QListView::startDrag | ( | ) | [protected, virtual] |
| void QListView::startDrag | ( | ) | [protected, virtual] |
Starts a drag.
| void QListView::styleChange | ( | QStyle & | old | ) | [protected, virtual] |
Reimplementado de QScrollView.
| void QListView::styleChange | ( | QStyle & | old | ) | [protected, virtual] |
Reimplementado de QScrollView.
| void QListView::takeItem | ( | QListViewItem * | i | ) | [virtual] |
Removes item i from the list view; i must be a top-level item. The warnings regarding QListViewItem::takeItem() apply to this function, too.
| virtual void QListView::takeItem | ( | QListViewItem * | ) | [virtual] |
| int QListView::treeStepSize | ( | ) | const |
| int QListView::treeStepSize | ( | ) | const |
| void QListView::triggerUpdate | ( | ) | [slot] |
| void QListView::triggerUpdate | ( | ) | [slot] |
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.
| void QListView::updateContents | ( | ) | [protected, slot] |
Updates the sizes of the viewport, header, scroll bars and so on.
Reimplementado de QScrollView.
| void QListView::updateContents | ( | ) | [protected, slot] |
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Reimplementado de QScrollView.
| void QListView::viewportResizeEvent | ( | QResizeEvent * | ) | [protected, virtual] |
To provide simple processing of events on the contents, this function receives all resize events sent to the viewport.
Reimplementado de QScrollView.
| void QListView::viewportResizeEvent | ( | QResizeEvent * | e | ) | [protected, virtual] |
Reimplementado de QScrollView.
| void QListView::windowActivationChange | ( | bool | oldActive | ) | [protected, virtual] |
This virtual function is called for a widget when its window is activated or deactivated by the window system. oldActive is the previous state; you can get the new setting from isActiveWindow().
Reimplement this function if your widget needs to know when its window becomes activated or deactivated.
The default implementation updates the visible part of the widget if the inactive and the active colorgroup are different for colors other than the highlight and link colors.
Reimplementado de QWidget.
| void QListView::windowActivationChange | ( | bool | oldActive | ) | [protected, virtual] |
Reimplementado de QWidget.
QCheckListItem [friend] |
QListViewItem [friend] |
QListViewItemIterator [friend] |
QListViewToolTip [friend] |
bool QListView::allColumnsShowFocus [read, write] |
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.
The default is FALSE.
Setting this to TRUE if it's not necessary may cause noticeable flicker.
int QListView::childCount [read] |
the number of parentless (top-level) QListViewItem objects in this QListView
Holds the current number of parentless (top-level) QListViewItem objects in this QListView.
int QListView::columns [read] |
the number of columns in this list view
RenameAction QListView::defaultRenameAction [read, write] |
What action to perform when the editor loses focus during renaming.
If this property is 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.
int QListView::itemMargin [read, write] |
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. QListViewItem::paintFocus() draws in the margin.
bool QListView::multiSelection [read, write] |
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.
ResizeMode QListView::resizeMode [read, write] |
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 (the default), AllColumns or LastColumn.
bool QListView::rootIsDecorated [read, write] |
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.
SelectionMode QListView::selectionMode [read, write] |
the list view's selection mode
The mode can be Single (the default), Extended, Multi or NoSelection.
bool QListView::showSortIndicator [read, write] |
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).
bool QListView::showToolTips [read, write] |
whether this list view should show tooltips for truncated column texts
The default is TRUE.
int QListView::treeStepSize [read, write] |
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.
1.7.4
