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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QABSTRACTITEMVIEW_P_H
#define QABSTRACTITEMVIEW_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "private/qabstractscrollarea_p.h"
#include "private/qabstractitemmodel_p.h"
#include "QtGui/qapplication.h"
#include "QtCore/qdatetime.h"
#include "QtGui/qevent.h"
#include "QtGui/qmime.h"
#include "QtGui/qpainter.h"
#include "QtCore/qpair.h"
#include "QtCore/qtimer.h"
#include "QtCore/qtimeline.h"
#include "QtGui/qregion.h"
#include "QtCore/qdebug.h"
#include "QtGui/qpainter.h"
#ifndef QT_NO_ITEMVIEWS
QT_BEGIN_NAMESPACE
struct QEditorInfo
{
QEditorInfo() : isStatic(false)
{
}
QEditorInfo(const QPersistentModelIndex &i, QWidget *e, bool b) : index(i), editor(e), isStatic(b)
{
}
QPersistentModelIndex index;
QPointer<QWidget> editor;
bool isStatic; //true when called from setIndexWidget
};
class QEmptyModel : public QAbstractItemModel
{
public:
explicit QEmptyModel(QObject *parent = 0) : QAbstractItemModel(parent) {}
QModelIndex index(int, int, const QModelIndex &) const { return QModelIndex(); }
QModelIndex parent(const QModelIndex &) const { return QModelIndex(); }
int rowCount(const QModelIndex &) const { return 0; }
int columnCount(const QModelIndex &) const { return 0; }
bool hasChildren(const QModelIndex &) const { return false; }
QVariant data(const QModelIndex &, int) const { return QVariant(); }
};
class Q_AUTOTEST_EXPORT QAbstractItemViewPrivate : public QAbstractScrollAreaPrivate
{
Q_DECLARE_PUBLIC(QAbstractItemView)
public:
QAbstractItemViewPrivate();
virtual ~QAbstractItemViewPrivate();
void init();
void _q_rowsRemoved(const QModelIndex &parent, int start, int end);
void _q_columnsAboutToBeRemoved(const QModelIndex &parent, int start, int end);
void _q_columnsRemoved(const QModelIndex &parent, int start, int end);
void _q_columnsInserted(const QModelIndex &parent, int start, int end);
void _q_modelDestroyed();
void _q_layoutChanged();
void _q_fetchMore();
bool shouldEdit(QAbstractItemView::EditTrigger trigger, const QModelIndex &index) const;
bool shouldForwardEvent(QAbstractItemView::EditTrigger trigger, const QEvent *event) const;
bool shouldAutoScroll(const QPoint &pos) const;
void doDelayedItemsLayout(int delay = 0);
void interruptDelayedItemsLayout() const;
bool dropOn(QDropEvent *event, int *row, int *col, QModelIndex *index);
bool droppingOnItself(QDropEvent *event, const QModelIndex &index);
QWidget *editor(const QModelIndex &index, const QStyleOptionViewItem &options);
bool sendDelegateEvent(const QModelIndex &index, QEvent *event) const;
bool openEditor(const QModelIndex &index, QEvent *event);
void updateEditorData(const QModelIndex &topLeft, const QModelIndex &bottomRight);
QItemSelectionModel::SelectionFlags multiSelectionCommand(const QModelIndex &index,
const QEvent *event) const;
QItemSelectionModel::SelectionFlags extendedSelectionCommand(const QModelIndex &index,
const QEvent *event) const;
QItemSelectionModel::SelectionFlags contiguousSelectionCommand(const QModelIndex &index,
const QEvent *event) const;
virtual void selectAll(QItemSelectionModel::SelectionFlags command);
inline QItemSelectionModel::SelectionFlags selectionBehaviorFlags() const
{
switch (selectionBehavior) {
case QAbstractItemView::SelectRows: return QItemSelectionModel::Rows;
case QAbstractItemView::SelectColumns: return QItemSelectionModel::Columns;
case QAbstractItemView::SelectItems: default: return QItemSelectionModel::NoUpdate;
}
}
#ifndef QT_NO_DRAGANDDROP
QAbstractItemView::DropIndicatorPosition position(const QPoint &pos, const QRect &rect, const QModelIndex &idx) const;
inline bool canDecode(QDropEvent *e) const {
QStringList modelTypes = model->mimeTypes();
const QMimeData *mime = e->mimeData();
for (int i = 0; i < modelTypes.count(); ++i)
if (mime->hasFormat(modelTypes.at(i))
&& (e->dropAction() & model->supportedDropActions()))
return true;
return false;
}
inline void paintDropIndicator(QPainter *painter)
{
if (showDropIndicator && state == QAbstractItemView::DraggingState
#ifndef QT_NO_CURSOR
&& viewport->cursor().shape() != Qt::ForbiddenCursor
#endif
) {
QStyleOption opt;
opt.init(q_func());
opt.rect = dropIndicatorRect;
q_func()->style()->drawPrimitive(QStyle::PE_IndicatorItemViewItemDrop, &opt, painter, q_func());
}
}
#endif
inline void releaseEditor(QWidget *editor) const {
if (editor) {
QObject::disconnect(editor, SIGNAL(destroyed(QObject*)),
q_func(), SLOT(editorDestroyed(QObject*)));
editor->removeEventFilter(itemDelegate);
editor->hide();
editor->deleteLater();
}
}
inline void executePostedLayout() const {
if (delayedPendingLayout && state != QAbstractItemView::CollapsingState) {
interruptDelayedItemsLayout();
const_cast<QAbstractItemView*>(q_func())->doItemsLayout();
}
}
inline void setDirtyRegion(const QRegion &visualRegion) {
updateRegion += visualRegion;
if (!updateTimer.isActive())
updateTimer.start(0, q_func());
}
inline void scrollDirtyRegion(int dx, int dy) {
scrollDelayOffset = QPoint(-dx, -dy);
updateDirtyRegion();
scrollDelayOffset = QPoint(0, 0);
}
inline void scrollContentsBy(int dx, int dy) {
scrollDirtyRegion(dx, dy);
viewport->scroll(dx, dy);
}
void updateDirtyRegion() {
updateTimer.stop();
viewport->update(updateRegion);
updateRegion = QRegion();
}
void clearOrRemove();
void checkPersistentEditorFocus();
QPixmap renderToPixmap(const QModelIndexList &indexes, QRect *r = 0) const;
inline QPoint offset() const {
const Q_Q(QAbstractItemView);
return QPoint(q->isRightToLeft() ? -q->horizontalOffset()
: q->horizontalOffset(), q->verticalOffset());
}
QEditorInfo editorForIndex(const QModelIndex &index) const;
inline bool hasEditor(const QModelIndex &index) const {
return editorForIndex(index).editor != 0;
}
QModelIndex indexForEditor(QWidget *editor) const;
void addEditor(const QModelIndex &index, QWidget *editor, bool isStatic);
void removeEditor(QWidget *editor);
inline bool isAnimating() const {
return state == QAbstractItemView::AnimatingState;
}
inline QAbstractItemDelegate *delegateForIndex(const QModelIndex &index) const {
QAbstractItemDelegate *del;
if ((del = rowDelegates.value(index.row(), 0))) return del;
if ((del = columnDelegates.value(index.column(), 0))) return del;
return itemDelegate;
}
inline bool isIndexValid(const QModelIndex &index) const {
return (index.row() >= 0) && (index.column() >= 0) && (index.model() == model);
}
inline bool isIndexSelectable(const QModelIndex &index) const {
return (model->flags(index) & Qt::ItemIsSelectable);
}
inline bool isIndexEnabled(const QModelIndex &index) const {
return (model->flags(index) & Qt::ItemIsEnabled);
}
inline bool isIndexDropEnabled(const QModelIndex &index) const {
return (model->flags(index) & Qt::ItemIsDropEnabled);
}
inline bool isIndexDragEnabled(const QModelIndex &index) const {
return (model->flags(index) & Qt::ItemIsDragEnabled);
}
virtual bool selectionAllowed(const QModelIndex &index) const {
// in some views we want to go ahead with selections, even if the index is invalid
return isIndexValid(index) && isIndexSelectable(index);
}
// reimplemented from QAbstractScrollAreaPrivate
virtual QPoint contentsOffset() const {
Q_Q(const QAbstractItemView);
return QPoint(q->horizontalOffset(), q->verticalOffset());
}
/**
* For now, assume that we have few editors, if we need a more efficient implementation
* we should add a QMap<QAbstractItemDelegate*, int> member.
*/
int delegateRefCount(const QAbstractItemDelegate *delegate) const
{
int ref = 0;
if (itemDelegate == delegate)
++ref;
for (int maps = 0; maps < 2; ++maps) {
const QMap<int, QPointer<QAbstractItemDelegate> > *delegates = maps ? &columnDelegates : &rowDelegates;
for (QMap<int, QPointer<QAbstractItemDelegate> >::const_iterator it = delegates->begin();
it != delegates->end(); ++it) {
if (it.value() == delegate) {
++ref;
// optimization, we are only interested in the ref count values 0, 1 or >=2
if (ref >= 2) {
return ref;
}
}
}
}
return ref;
}
/**
* return true if the index is registered as a QPersistentModelIndex
*/
inline bool isPersistent(const QModelIndex &index) const
{
return static_cast<QAbstractItemModelPrivate *>(model->d_ptr)->persistent.indexes.contains(index);
}
QModelIndexList selectedDraggableIndexes() const;
QStyleOptionViewItemV4 viewOptionsV4() const;
QAbstractItemModel *model;
QPointer<QAbstractItemDelegate> itemDelegate;
QMap<int, QPointer<QAbstractItemDelegate> > rowDelegates;
QMap<int, QPointer<QAbstractItemDelegate> > columnDelegates;
QPointer<QItemSelectionModel> selectionModel;
QAbstractItemView::SelectionMode selectionMode;
QAbstractItemView::SelectionBehavior selectionBehavior;
QList<QEditorInfo> editors;
QSet<QWidget*> persistent;
QWidget *currentlyCommittingEditor;
QPersistentModelIndex enteredIndex;
QPersistentModelIndex pressedIndex;
Qt::KeyboardModifiers pressedModifiers;
QPoint pressedPosition;
bool pressedAlreadySelected;
//forces the next mouseMoveEvent to send the viewportEntered signal
//if the mouse is over the viewport and not over an item
bool viewportEnteredNeeded;
QAbstractItemView::State state;
QAbstractItemView::EditTriggers editTriggers;
QAbstractItemView::EditTrigger lastTrigger;
QPersistentModelIndex root;
QPersistentModelIndex hover;
bool tabKeyNavigation;
#ifndef QT_NO_DRAGANDDROP
bool showDropIndicator;
QRect dropIndicatorRect;
bool dragEnabled;
QAbstractItemView::DragDropMode dragDropMode;
bool overwrite;
QAbstractItemView::DropIndicatorPosition dropIndicatorPosition;
#endif
QString keyboardInput;
QTime keyboardInputTime;
bool autoScroll;
QBasicTimer autoScrollTimer;
int autoScrollMargin;
int autoScrollCount;
bool shouldScrollToCurrentOnShow; //used to know if we should scroll to current on show event
bool alternatingColors;
QSize iconSize;
Qt::TextElideMode textElideMode;
QRegion updateRegion; // used for the internal update system
QPoint scrollDelayOffset;
QBasicTimer updateTimer;
QBasicTimer delayedEditing;
QBasicTimer delayedAutoScroll; //used when an item is clicked
QTimeLine timeline;
QAbstractItemView::ScrollMode verticalScrollMode;
QAbstractItemView::ScrollMode horizontalScrollMode;
bool currentIndexSet;
bool wrapItemText;
mutable bool delayedPendingLayout;
private:
mutable QBasicTimer delayedLayout;
};
QT_BEGIN_INCLUDE_NAMESPACE
#include <qvector.h>
QT_END_INCLUDE_NAMESPACE
template <typename T>
inline int qBinarySearch(const QVector<T> &vec, const T &item, int start, int end)
{
int i = (start + end + 1) >> 1;
while (end - start > 0) {
if (vec.at(i) > item)
end = i - 1;
else
start = i;
i = (start + end + 1) >> 1;
}
return i;
}
QT_END_NAMESPACE
#endif // QT_NO_ITEMVIEWS
#endif // QABSTRACTITEMVIEW_P_H
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