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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** Copyright (C) 2014 Canonical Ltda
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Components project.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
// FastScroll.qml
import QtQuick 2.4
import Ubuntu.Components 1.3
import "FastScroll.js" as Sections
Item {
id: root
property ListView listView
property int pinSize: units.gu(2)
readonly property var letters: ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "#"]
readonly property alias fastScrolling: internal.fastScrolling
readonly property bool showing: (rail.opacity !== 0.0)
readonly property double minimumHeight: rail.height
width: units.gu(7)
height: rail.height
visible: enabled
onListViewChanged: {
if (listView && listView.model) {
internal.initDirtyObserver();
} else if (listView) {
listView.modelChanged.connect(function() {
if (listView.model) {
internal.initDirtyObserver();
}
});
}
}
UbuntuShape {
id: magnified
aspect: UbuntuShape.Flat
color: Theme.palette.normal.foreground
radius: "medium"
height: units.gu(6)
width: units.gu(8)
opacity: internal.fastScrolling && root.enabled ? 1.0 : 0.0
x: -magnified.width
y: {
if (internal.currentItem) {
var itemCenterY = rail.y + internal.currentItem.y + (internal.currentItem.height / 2)
return (itemCenterY - (magnified.height / 2))
} else {
return 0
}
}
Triangle {
id: arrow
color: magnified.color
fill: true
height: units.gu(1.5)
width: units.gu(0.5)
anchors {
verticalCenter: parent.verticalCenter
right: parent.right
rightMargin: -width
}
}
Label {
color: Theme.palette.selected.backgroundText
anchors.fill: parent
horizontalAlignment: Text.AlignHCenter
verticalAlignment: Text.AlignVCenter
text: internal.desireSection
fontSize: "small"
}
Behavior on opacity {
UbuntuNumberAnimation {}
}
}
Rectangle {
id: cursor
property bool showLabel: false
property string currentSectionName: ""
radius: pinSize * 0.3
height: pinSize
width: height
color: Theme.palette.normal.foreground
opacity: rail.opacity
x: rail.x
y: {
if (internal.currentItem) {
var itemCenterY = rail.y + internal.currentItem.y + (internal.currentItem.height / 2)
return (itemCenterY - (cursor.height / 2))
} else {
return 0
}
}
Behavior on y {
enabled: !internal.fastScrolling
UbuntuNumberAnimation { }
}
}
Column {
id: rail
property bool isVisible: root.enabled &&
(listView.flicking || dragArea.pressed)
anchors {
right: parent.right
rightMargin: units.gu(2)
left: parent.left
leftMargin: units.gu(2)
top: parent.top
}
height: childrenRect.height
opacity: 0.0
onIsVisibleChanged: {
if (isVisible) {
rail.opacity = 1.0
hideTimer.stop()
} else if (!root.enabled) {
rail.opacity = 0.0
} else {
hideTimer.restart()
}
}
Behavior on opacity {
UbuntuNumberAnimation { }
}
Repeater {
id: sectionsRepeater
model: root.letters
Label {
id: lbl
anchors.left: parent.left
height: pinSize
width: pinSize
verticalAlignment: Text.AlignVCenter
horizontalAlignment: Text.AlignHCenter
text: modelData
fontSize: "x-small"
color: cursor.y === y ? Theme.palette.selected.backgroundText : Theme.palette.normal.foregroundText
opacity: !internal.modelDirty && Sections.contains(text) ? 1.0 : 0.5
}
}
Timer {
id: hideTimer
running: false
interval: 2000
onTriggered: rail.opacity = 0.0
}
}
MouseArea {
id: dragArea
anchors {
left: parent.left
right: parent.right
}
y: rail.y
height: rail.height
visible: rail.opacity == 1.0
preventStealing: true
onPressed: {
internal.adjustContentPosition(mouseY)
dragginTimer.start()
}
onReleased: {
dragginTimer.stop()
internal.desireSection = ""
internal.fastScrolling = false
}
onPositionChanged: internal.adjustContentPosition(mouseY)
Timer {
id: dragginTimer
running: false
interval: 150
onTriggered: {
internal.fastScrolling = true
}
}
}
Timer {
id: dirtyTimer
interval: 500
running: false
onTriggered: {
Sections.initSectionData(listView);
internal.modelDirty = false;
}
}
Timer {
id: timerScroll
running: false
interval: 10
onTriggered: {
if (internal.desireSection != internal.currentSection) {
var idx = Sections.getIndexFor(internal.desireSection)
if (idx !== -1) {
listView.cancelFlick()
listView.positionViewAtIndex(idx, ListView.Beginning)
}
}
}
}
QtObject {
id: internal
property string currentSection: listView.currentSection
property string desireSection: ""
property string targetSection: fastScrolling ? desireSection : currentSection
property int oldY: 0
property bool modelDirty: false
property bool down: true
property bool fastScrolling: false
property var currentItem: null
onTargetSectionChanged: moveIndicator(targetSection)
function initDirtyObserver() {
Sections.initialize(listView);
function dirtyObserver() {
if (!internal.modelDirty) {
internal.modelDirty = true;
dirtyTimer.running = true;
}
}
if (listView.model.countChanged)
listView.model.countChanged.connect(dirtyObserver);
if (listView.model.itemsChanged)
listView.model.itemsChanged.connect(dirtyObserver);
if (listView.model.itemsInserted)
listView.model.itemsInserted.connect(dirtyObserver);
if (listView.model.itemsMoved)
listView.model.itemsMoved.connect(dirtyObserver);
if (listView.model.itemsRemoved)
listView.model.itemsRemoved.connect(dirtyObserver);
}
function adjustContentPosition(mouseY) {
var child = rail.childAt(rail.width / 2, mouseY)
if (!child || child.text === "") {
return
}
var section = child.text
if (internal.desireSection !== section) {
internal.desireSection = section
moveIndicator(section)
if (dragArea.pressed) {
timerScroll.restart()
}
}
}
function moveIndicator(section)
{
var index = root.letters.indexOf(section)
if (index != -1) {
currentItem = sectionsRepeater.itemAt(index)
}
}
}
}
|