blob: ebed39a41a9633d38fa87a267993864636e1ce7f (
plain)
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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/***************************************************************************
* 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 KITEMLISTVIEWLAYOUTER_H
#define KITEMLISTVIEWLAYOUTER_H
#include <libdolphin_export.h>
#include <QObject>
#include <QRectF>
#include <QSet>
#include <QSizeF>
class KItemModelBase;
class KItemListSizeHintResolver;
class LIBDOLPHINPRIVATE_EXPORT KItemListViewLayouter : public QObject
{
Q_OBJECT
public:
KItemListViewLayouter(QObject* parent = 0);
virtual ~KItemListViewLayouter();
void setScrollOrientation(Qt::Orientation orientation);
Qt::Orientation scrollOrientation() const;
void setSize(const QSizeF& size);
QSizeF size() const;
void setItemSize(const QSizeF& size);
QSizeF itemSize() const;
/**
* Margin between the rows and columns of items.
*/
void setItemMargin(const QSizeF& margin);
QSizeF itemMargin() const;
/**
* Sets the height of the header that is always aligned
* at the top. A height of <= 0.0 means that no header is
* used.
*/
void setHeaderHeight(qreal height);
qreal headerHeight() const;
/**
* Sets the height of the group header that is used
* to indicate a new item group.
*/
void setGroupHeaderHeight(qreal height);
qreal groupHeaderHeight() const;
/**
* Sets the margin between the last items of the group n and
* the group header for the group n + 1.
*/
void setGroupHeaderMargin(qreal margin);
qreal groupHeaderMargin() const;
void setScrollOffset(qreal scrollOffset);
qreal scrollOffset() const;
qreal maximumScrollOffset() const;
void setItemOffset(qreal scrollOffset);
qreal itemOffset() const;
qreal maximumItemOffset() const;
void setModel(const KItemModelBase* model);
const KItemModelBase* model() const;
void setSizeHintResolver(const KItemListSizeHintResolver* sizeHintResolver);
const KItemListSizeHintResolver* sizeHintResolver() const;
/**
* @return The first (at least partly) visible index. -1 is returned
* if the item count is 0.
*/
int firstVisibleIndex() const;
/**
* @return The last (at least partly) visible index. -1 is returned
* if the item count is 0.
*/
int lastVisibleIndex() const;
/**
* @return Rectangle of the item with the index \a index.
* The top/left of the bounding rectangle is related to
* the top/left of the KItemListView. An empty rectangle
* is returned if an invalid index is given.
*/
QRectF itemRect(int index) const;
QRectF groupHeaderRect(int index) const;
/**
* @return Maximum number of (at least partly) visible items for
* the given size.
*/
int maximumVisibleItems() const;
/**
* @return True if the item with the index \p itemIndex
* is the first item within a group.
*/
bool isFirstGroupItem(int itemIndex) const;
void markAsDirty();
private:
void doLayout();
void updateVisibleIndexes();
bool createGroupHeaders();
/**
* @return Minimum width of group headers when grouping is enabled in the horizontal
* alignment mode. The header alignment is done like this:
* Header-1 Header-2 Header-3
* Item 1 Item 4 Item 7
* Item 2 Item 5 Item 8
* Item 3 Item 6 Item 9
*/
qreal minimumGroupHeaderWidth() const;
private:
bool m_dirty;
bool m_visibleIndexesDirty;
Qt::Orientation m_scrollOrientation;
QSizeF m_size;
QSizeF m_itemSize;
QSizeF m_itemMargin;
qreal m_headerHeight;
const KItemModelBase* m_model;
const KItemListSizeHintResolver* m_sizeHintResolver;
qreal m_scrollOffset;
qreal m_maximumScrollOffset;
qreal m_itemOffset;
qreal m_maximumItemOffset;
int m_firstVisibleIndex;
int m_lastVisibleIndex;
qreal m_columnWidth;
qreal m_xPosInc;
int m_columnCount;
// Stores all item indexes that are the first item of a group.
// Assures fast access for KItemListViewLayouter::isFirstGroupItem().
QSet<int> m_groupItemIndexes;
qreal m_groupHeaderHeight;
qreal m_groupHeaderMargin;
QList<QRectF> m_itemRects;
friend class KItemListControllerTest;
};
#endif
|
