1 /* ============================================================
2 *
3 * This file is a part of digiKam project
4 * https://www.digikam.org
5 *
6 * Date : 2017-06-04
7 * Description : A label to show transition preview
8 *
9 * Copyright (C) 2017-2021 by Gilles Caulier <caulier dot gilles at gmail dot com>
10 *
11 * This program is free software; you can redistribute it
12 * and/or modify it under the terms of the GNU General
13 * Public License as published by the Free Software Foundation;
14 * either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * ============================================================ */
23
24 #include "transitionpreview.h"
25
26 // Qt includes
27
28 #include <QTimer>
29 #include <QImage>
30 #include <QPixmap>
31 #include <QStandardPaths>
32
33 // Local includes
34
35 #include "frameutils.h"
36 #include "digikam_debug.h"
37
38 namespace Digikam
39 {
40
41 class Q_DECL_HIDDEN TransitionPreview::Private
42 {
43 public:
44
Private()45 explicit Private()
46 : mngr (nullptr),
47 curTransition(TransitionMngr::None),
48 previewSize (QSize(192, 144))
49 {
50 }
51
52 QTimer restartTimer;
53 QTimer transTimer;
54 TransitionMngr* mngr;
55 TransitionMngr::TransType curTransition;
56 QSize previewSize;
57 };
58
TransitionPreview(QWidget * const parent)59 TransitionPreview::TransitionPreview(QWidget* const parent)
60 : QLabel(parent),
61 d (new Private)
62 {
63 setFixedSize(d->previewSize);
64 setContentsMargins(QMargins());
65 setScaledContents(false);
66 setOpenExternalLinks(false);
67 setFocusPolicy(Qt::NoFocus);
68 setSizePolicy(QSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum));
69
70 d->mngr = new TransitionMngr;
71 d->mngr->setOutputSize(d->previewSize);
72
73 connect(&d->transTimer, SIGNAL(timeout()),
74 this, SLOT(slotProgressTransition()));
75
76 connect(&d->restartTimer, SIGNAL(timeout()),
77 this, SLOT(slotRestart()));
78 }
79
~TransitionPreview()80 TransitionPreview::~TransitionPreview()
81 {
82 delete d;
83 }
84
setImagesList(const QList<QUrl> & images)85 void TransitionPreview::setImagesList(const QList<QUrl>& images)
86 {
87 if (!images.isEmpty())
88 {
89 d->mngr->setInImage(FrameUtils::makeFramedImage(images[0].toLocalFile(), d->previewSize));
90
91 if (images.count() > 1)
92 {
93 d->mngr->setOutImage(FrameUtils::makeFramedImage(images[1].toLocalFile(), d->previewSize));
94 }
95 else
96 {
97 QImage blank(d->previewSize, QImage::Format_ARGB32);
98 blank.fill(Qt::black);
99 d->mngr->setOutImage(blank);
100 }
101 }
102 else
103 {
104 QImage sample = QImage(QStandardPaths::locate(QStandardPaths::GenericDataLocation,
105 QLatin1String("digikam/data/sample-aix.png")));
106 d->mngr->setInImage(sample);
107
108 QImage blank(d->previewSize, QImage::Format_ARGB32);
109 blank.fill(Qt::black);
110 d->mngr->setOutImage(blank);
111 }
112 }
113
startPreview(TransitionMngr::TransType eff)114 void TransitionPreview::startPreview(TransitionMngr::TransType eff)
115 {
116 stopPreview();
117 d->curTransition = eff;
118 d->mngr->setTransition(eff);
119 d->transTimer.start(100);
120 }
121
slotProgressTransition()122 void TransitionPreview::slotProgressTransition()
123 {
124 int tmout = -1;
125 QImage img = d->mngr->currentFrame(tmout);
126 setPixmap(QPixmap::fromImage(img));
127
128 if (tmout == -1)
129 {
130 stopPreview();
131 d->restartTimer.start(1000);
132 }
133 }
134
stopPreview()135 void TransitionPreview::stopPreview()
136 {
137 d->transTimer.stop();
138 d->restartTimer.stop();
139 }
140
slotRestart()141 void TransitionPreview::slotRestart()
142 {
143 startPreview(d->curTransition);
144 }
145
146 } // namespace Digikam
147
