com.trolltech.qt.gui
Class QTreeModel

java.lang.Object
  com.trolltech.qt.internal.QSignalEmitterInternal
      com.trolltech.qt.QSignalEmitter
          com.trolltech.qt.QtJambiObject
              com.trolltech.qt.core.QObject
                  com.trolltech.qt.core.QAbstractItemModel
                      com.trolltech.qt.gui.QTreeModel

All Implemented Interfaces:

QtJambiInterface

public abstract class QTreeModel
extends QAbstractItemModel

Nested Class Summary

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter

QSignalEmitter.AbstractSignal, QSignalEmitter.PrivateSignal0, QSignalEmitter.PrivateSignal1, QSignalEmitter.PrivateSignal2, QSignalEmitter.PrivateSignal3, QSignalEmitter.PrivateSignal4, QSignalEmitter.PrivateSignal5, QSignalEmitter.PrivateSignal6, QSignalEmitter.PrivateSignal7, QSignalEmitter.PrivateSignal8, QSignalEmitter.PrivateSignal9, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9

Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal

com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal

Field Summary

Fields inherited from class com.trolltech.qt.core.QAbstractItemModel

columnsAboutToBeInserted, columnsAboutToBeRemoved, columnsInserted, columnsRemoved, dataChanged, headerDataChanged, layoutAboutToBeChanged, layoutChanged, modelAboutToBeReset, modelReset, rowsAboutToBeInserted, rowsAboutToBeRemoved, rowsInserted, rowsRemoved

Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal

currentSender

Method Summary

abstract java.lang.Object	child(java.lang.Object parent, int index) Returns the child specified by index, of the given node.
abstract int	childCount(java.lang.Object parent) Returns the given node's number of children, or 0 if the node is a leaf node.
void	childrenInserted(com.trolltech.qt.core.QModelIndex parent, int first, int last) Inserts last - first + 1 nodes into the given parent, before the node specified by first.
void	childrenRemoved(com.trolltech.qt.core.QModelIndex parent, int first, int last) Removes the nodes from first to last from the given parent, including the node specified by last.
java.lang.Object	data(java.lang.Object value, int role) Using the standard QTreeView class to view the content's of the model, the text is rendered using QTreeView's fonts.
QIcon	icon(java.lang.Object value) Reimplement this function to get graphical nodes.
java.lang.Object	indexToValue(com.trolltech.qt.core.QModelIndex index) Translates the given index to a value node and returns the node.
void	releaseChildren(com.trolltech.qt.core.QModelIndex index) Releases datastructures that are no longer needed, from the memory pool.
abstract java.lang.String	text(java.lang.Object value) Returns a string representation of the given value.
com.trolltech.qt.core.QModelIndex	valueToIndex(java.lang.Object object) Returns the model index for object.

Methods inherited from class com.trolltech.qt.core.QAbstractItemModel

beginInsertColumns, beginInsertRows, beginRemoveColumns, beginRemoveRows, buddy, canFetchMore, changePersistentIndex, changePersistentIndexList, columnCount, columnCount, createIndex, createIndex, createIndex, data, data, data, data, dropMimeData, endInsertColumns, endInsertRows, endRemoveColumns, endRemoveRows, fetchMore, flags, hasChildren, hasChildren, hasIndex, hasIndex, headerData, headerData, index, index, insertColumn, insertColumn, insertColumns, insertColumns, insertRow, insertRow, insertRows, insertRows, itemData, match, match, match, match, mimeData, mimeTypes, parent, persistentIndexList, removeColumn, removeColumn, removeColumns, removeColumns, removeRow, removeRow, removeRows, removeRows, reset, revert, rowCount, rowCount, setData, setData, setData, setData, setHeaderData, setHeaderData, setItemData, setSupportedDragActions, setSupportedDragActions, sibling, sort, sort, span, submit, supportedDragActions, supportedDropActions

Methods inherited from class com.trolltech.qt.core.QObject

childEvent, children, connectSlotsByName, customEvent, disposeLater, dumpObjectInfo, dumpObjectTree, dynamicPropertyNames, event, eventFilter, findChild, findChild, findChild, findChildren, findChildren, findChildren, findChildren, indexOfProperty, installEventFilter, isWidgetType, killTimer, moveToThread, objectName, parent, properties, property, removeEventFilter, setObjectName, setParent, setProperty, startTimer, timerEvent, toString, userProperty

Methods inherited from class com.trolltech.qt.QtJambiObject

dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr

Methods inherited from class com.trolltech.qt.QSignalEmitter

blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread

Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal

__qt_signalInitialization

Methods inherited from class java.lang.Object

clone, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.trolltech.qt.QtJambiInterface

disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership

Method Detail

childrenInserted

public final void childrenInserted(com.trolltech.qt.core.QModelIndex parent,
                                   int first,
                                   int last)

Inserts last - first + 1 nodes into the given parent, before the node specified by first. Note that this function must be called when nodes have been inserted into the model.

See also:

beginInsertRows().

childrenRemoved

public final void childrenRemoved(com.trolltech.qt.core.QModelIndex parent,
                                  int first,
                                  int last)

Removes the nodes from first to last from the given parent, including the node specified by last. Note that this function must be called when nodes have been removed from the model.

See also:

beginDeleteRows().

indexToValue

public final java.lang.Object indexToValue(com.trolltech.qt.core.QModelIndex index)

Translates the given index to a value node and returns the node.

releaseChildren

public final void releaseChildren(com.trolltech.qt.core.QModelIndex index)

Releases datastructures that are no longer needed, from the memory pool.

Internally, the QTreeModel class caches the datastructures of nodes that have been expanded. Call the releaseChildren() function to release parts of this memory pool when they are no longer needed, for example when the view collapses a subtree.

Note that if the model is shared between multiple views, calling the model's releaseChildren() function affects all.

valueToIndex

public final com.trolltech.qt.core.QModelIndex valueToIndex(java.lang.Object object)

Returns the model index for object.

child

public abstract java.lang.Object child(java.lang.Object parent,
                                       int index)

Returns the child specified by index, of the given node.

childCount

public abstract int childCount(java.lang.Object parent)

Returns the given node's number of children, or 0 if the node is a leaf node.

data

public java.lang.Object data(java.lang.Object value,
                             int role)

Using the standard QTreeView class to view the content's of the model, the text is rendered using QTreeView's fonts. Reimplement this function to alter the view's rendering behavior.

The default implementation is calling text() and icon() function for the given value and role.

icon

public QIcon icon(java.lang.Object value)

Reimplement this function to get graphical nodes. The default implementation returns an empty icon.

text

public abstract java.lang.String text(java.lang.Object value)

Returns a string representation of the given value.