1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/***************************************************************************
* 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 position of the visible role has been changed.
*/
void visibleRoleMoved(const QByteArray& role, int currentIndex, int previousIndex);
/**
* 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,
QWidget* widget = 0) const;
void updatePressedRoleIndex(const QPointF& pos);
void updateHoveredRoleIndex(const QPointF& pos);
int roleIndexAt(const QPointF& pos) const;
bool isAboveRoleGrip(const QPointF& pos, int roleIndex) const;
/**
* Creates a pixmap of the role with the index \a roleIndex that is shown
* during moving a role.
*/
QPixmap createRolePixmap(int roleIndex) const;
/**
* @return Target index of the currently moving visible role based on the current
* state of m_movingRole.
*/
int targetOfMovingRole() const;
/**
* @return x-position of the left border of the role \a role.
*/
qreal roleXPosition(const QByteArray& role) 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;
struct MovingRole
{
QPixmap pixmap;
int x;
int xDec;
int index;
} m_movingRole;
};
#endif
|
