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101 lines
3.6 KiB
C++
101 lines
3.6 KiB
C++
/*
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Copyright 2007 Robert Knight <robertknight@gmail.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef FLIPSCROLLVIEW_H
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#define FLIPSCROLLVIEW_H
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// Qt
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#include <QAbstractItemView>
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namespace Kickoff
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{
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/**
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* An "iPod-style" item view for single-column tree and list data models which
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* displays items in pages (one per tree branch).
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*
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* Clicking on an item which has children (eg. a folder in a directory model)
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* scrolls the whole contents of the view to show the items children. A large back
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* arrow is displayed on the left of the display if the current item has a valid parent,
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* when clicked on this scrolls the whole contents of the view to show the parent item's
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* children.
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*
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* The view assumes that the item delegate will fill the background with the current palette's
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* highlight color when the user hovers over items with the mouse. Item delegates should check
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* for the QStyle::State_MouseOver or QStyle::State_Selected flags in the state
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* field of the QStyleOptionViewItem passed to the QAbstractItemDelegate::paint() method.
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*/
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class FlipScrollView : public QAbstractItemView
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{
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Q_OBJECT
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public:
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/** Construct a new FlipScrollView with the specified parent. */
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FlipScrollView(QWidget *parent = 0);
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virtual ~FlipScrollView();
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void setCurrentRoot(const QModelIndex &index);
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/** Go to the root item. */
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void viewRoot();
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// reimplemented from QAbstractItemView
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virtual QModelIndex indexAt(const QPoint& point) const;
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virtual void scrollTo(const QModelIndex& index, ScrollHint hint = EnsureVisible);
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virtual QRect visualRect(const QModelIndex& index) const;
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int itemHeight() const;
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Q_SIGNALS:
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void currentRootChanged(const QModelIndex &index);
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void focusNextViewLeft();
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protected:
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// reimplemented from QWidget
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virtual void paintEvent(QPaintEvent *event);
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virtual void mouseMoveEvent(QMouseEvent *event);
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virtual void mousePressEvent(QMouseEvent *event);
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virtual void mouseReleaseEvent(QMouseEvent *event);
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virtual void resizeEvent(QResizeEvent *event);
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virtual void keyPressEvent(QKeyEvent *event);
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virtual void leaveEvent(QEvent *event);
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// reimplemented from QAbstractItemView
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virtual bool isIndexHidden(const QModelIndex& index) const;
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virtual int horizontalOffset() const;
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virtual int verticalOffset() const;
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virtual QRegion visualRegionForSelection(const QItemSelection& selection) const;
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virtual QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers);
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virtual void setSelection(const QRect& rect , QItemSelectionModel::SelectionFlags flags);
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virtual void startDrag(Qt::DropActions supportedActions);
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private Q_SLOTS:
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void openItem(const QModelIndex& index);
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void updateFlipAnimation(qreal value);
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private:
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void paintItems(QPainter &painter, QPaintEvent *event, QModelIndex &index);
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class Private;
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Private * const d;
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};
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}
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#endif // FLIPSCROLLVIEW_H
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