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
185
186
187
188
189
190
191
192
193
|
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Quick Controls module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later 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 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.2
QtObject {
property int count: 0
signal selectionChanged
property bool __dirty: false
property var __ranges: []
function forEach (callback) {
if (!(callback instanceof Function)) {
console.warn("TableViewSelection.forEach: argument is not a function")
return;
}
__forEach(callback, -1)
}
function contains(index) {
for (var i = 0 ; i < __ranges.length ; ++i) {
if (__ranges[i][0] <= index && index <= __ranges[i][1])
return true;
else if (__ranges[i][0] > index)
return false;
}
return false;
}
function clear() {
__ranges = []
__dirty = true
count = 0
selectionChanged()
}
function selectAll() { select(0, rowCount - 1) }
function select(first, last) { __select(true, first, last) }
function deselect(first, last) { __select(false, first, last) }
// --- private section ---
function __printRanges() {
var out = ""
for (var i = 0 ; i < __ranges.length ; ++ i)
out += ("{" + __ranges[i][0] + "," + __ranges[i][1] + "} ")
print(out)
}
function __count() {
var sum = 0
for (var i = 0 ; i < __ranges.length ; ++i) {
sum += (1 + __ranges[i][1] - __ranges[i][0])
}
return sum
}
function __forEach (callback, startIndex) {
__dirty = false
var i, j
for (i = 0 ; i < __ranges.length && !__dirty ; ++i) {
for (j = __ranges[i][0] ; !__dirty && j <= __ranges[i][1] ; ++j) {
if (j >= startIndex)
callback.call(this, j)
}
}
// Restart iteration at last index if selection changed
if (__dirty)
return __forEach(callback, j)
}
function __selectOne(index) {
__ranges = [[index, index]]
__dirty = true
count = 1
selectionChanged();
}
function __select(select, first, last) {
var i, range
var start = first
var stop = first
var startRangeIndex = -1
var stopRangeIndex = -1
var newRangePos = 0
if (first < 0 || last < 0 || first >= rowCount || last >=rowCount) {
console.warn("TableViewSelection: index out of range")
return
}
if (last !== undefined) {
start = first <= last ? first : last
stop = first <= last ? last : first
}
if (select) {
// Find beginning and end ranges
for (i = 0 ; i < __ranges.length; ++ i) {
range = __ranges[i]
if (range[0] > stop + 1) continue; // above range
if (range[1] < start - 1) { // below range
newRangePos = i + 1
continue;
}
if (startRangeIndex === -1)
startRangeIndex = i
stopRangeIndex = i
}
if (startRangeIndex !== -1)
start = Math.min(__ranges[startRangeIndex][0], start)
if (stopRangeIndex !== -1)
stop = Math.max(__ranges[stopRangeIndex][1], stop)
if (startRangeIndex === -1)
startRangeIndex = newRangePos
__ranges.splice(Math.max(0, startRangeIndex),
1 + stopRangeIndex - startRangeIndex, [start, stop])
} else {
// Find beginning and end ranges
for (i = 0 ; i < __ranges.length; ++ i) {
range = __ranges[i]
if (range[1] < start) continue; // below range
if (range[0] > stop) continue; // above range
if (startRangeIndex === -1)
startRangeIndex = i
stopRangeIndex = i
}
// Slice ranges accordingly
if (startRangeIndex >= 0 && stopRangeIndex >= 0) {
var startRange = __ranges[startRangeIndex]
var stopRange = __ranges[stopRangeIndex]
var length = 1 + stopRangeIndex - startRangeIndex
if (start <= startRange[0] && stop >= stopRange[1]) { //remove
__ranges.splice(startRangeIndex, length)
} else if (start - 1 < startRange[0] && stop <= stopRange[1]) { //cut front
__ranges.splice(startRangeIndex, length, [stop + 1, stopRange[1]])
} else if (start - 1 < startRange[1] && stop >= stopRange[1]) { // cut back
__ranges.splice(startRangeIndex, length, [startRange[0], start - 1])
} else { //split
__ranges.splice(startRangeIndex, length, [startRange[0], start - 1], [stop + 1, stopRange[1]])
}
}
}
__dirty = true
count = __count() // forces a re-evaluation of indexes in the delegates
selectionChanged()
}
}
|
