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/***************************************************************************
* Copyright (C) 2011 by Peter Penz <[email protected]> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
#ifndef KITEMLISTHEADER_H
#define KITEMLISTHEADER_H
#include <libdolphin_export.h>
#include <QGraphicsWidget>
#include <QHash>
#include <QList>
class KItemModelBase;
/**
* @brief Header for KItemListView that shows the currently used roles.
*/
class LIBDOLPHINPRIVATE_EXPORT KItemListHeader : public QGraphicsWidget
{
Q_OBJECT
public:
KItemListHeader(QGraphicsWidget* parent = 0);
virtual ~KItemListHeader();
void setModel(KItemModelBase* model);
KItemModelBase* model() const;
void setVisibleRoles(const QList<QByteArray>& roles);
QList<QByteArray> visibleRoles() const;
void setVisibleRolesWidths(const QHash<QByteArray, qreal> rolesWidths);
QHash<QByteArray, qreal> visibleRolesWidths() const;
qreal minimumRoleWidth() const;
virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0);
signals:
/**
* Is emitted if the width of a visible role has been adjusted by the user with the mouse
* (no signal is emitted if KItemListHeader::setVisibleRoles() is invoked).
*/
void visibleRoleWidthChanged(const QByteArray& role,
qreal currentWidth,
qreal previousWidth);
/**
* Is emitted if the user has changed the sort order by clicking on a
* header item. The sort order of the model has already been adjusted to
* the current sort order. Note that no signal will be emitted if the
* sort order of the model has been changed without user interaction.
*/
void sortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous);
/**
* Is emitted if the user has changed the sort role by clicking on a
* header item. The sort role of the model has already been adjusted to
* the current sort role. Note that no signal will be emitted if the
* sort role of the model has been changed without user interaction.
*/
void sortRoleChanged(const QByteArray& current, const QByteArray& previous);
protected:
virtual void mousePressEvent(QGraphicsSceneMouseEvent* event);
virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent* event);
virtual void mouseMoveEvent(QGraphicsSceneMouseEvent* event);
virtual void hoverEnterEvent(QGraphicsSceneHoverEvent* event);
virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent* event);
virtual void hoverMoveEvent(QGraphicsSceneHoverEvent* event);
private slots:
void slotSortRoleChanged(const QByteArray& current, const QByteArray& previous);
void slotSortOrderChanged(Qt::SortOrder current, Qt::SortOrder previous);
private:
void paintRole(QPainter* painter, const QByteArray& role, const QRectF& rect, int orderIndex);
void updatePressedRoleIndex(const QPointF& pos);
void updateHoveredRoleIndex(const QPointF& pos);
int roleIndexAt(const QPointF& pos) const;
bool isAboveRoleGrip(const QPointF& pos, int roleIndex) const;
private:
enum RoleOperation
{
NoRoleOperation,
ResizeRoleOperation,
MoveRoleOperation
};
KItemModelBase* m_model;
QList<QByteArray> m_visibleRoles;
QHash<QByteArray, qreal> m_visibleRolesWidths;
int m_hoveredRoleIndex;
int m_pressedRoleIndex;
RoleOperation m_roleOperation;
QPointF m_pressedMousePos;
};
#endif
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