/
ThumbnailsView.cpp
115 lines (97 loc) · 2.77 KB
/
ThumbnailsView.cpp
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
#include "ThumbnailsView.h"
#include <QApplication>
#include <QPainter>
#include <QResizeEvent>
#include "Sqlite.h"
#include "ImageUtil.h"
#include <QDebug>
#include "ListItemDelegate.h"
ThumbnailsView::ThumbnailsView(QWidget *parent)
: QListWidget(parent), thumbnailSize(220, 180)
{
setItemDelegate(new ListItemDelegate(this));
setViewMode(QListWidget::IconMode);
setIconSize(thumbnailSize);
setResizeMode(QListWidget::Adjust);
setMovement(QListWidget::Static);
setSpacing(10);
setSelectionMode(QAbstractItemView::SingleSelection);
setDragDrop();
setContextMenuPolicy(Qt::CustomContextMenu);
}
void ThumbnailsView::setDragDrop()
{
viewport()->setAcceptDrops(true);;
setDragEnabled(true);
setDropIndicatorShown(true);
setDragDropMode(QAbstractItemView::DragDrop);
}
void ThumbnailsView::showImagesByTermId(int termId, QString taxonomy)
{
clear();
QVector<Image*> images;
if (taxonomy == "favorites")
images = _sqlite->queryFavoritesImages();
else
images = _sqlite->queryImages(termId, taxonomy);
for (int i=0; i<images.size(); ++i)
{
Image *image = images[i];
addListWidgetItem(image);
delete image;
}
if (images.size())
{
this->setCurrentItem(item(0));
item(0)->setSelected(true);
}
}
void ThumbnailsView::addListWidgetItem(Image *image)
{
QPixmap thumbnail = QPixmap();
thumbnail.loadFromData(image->thumbnail());
QListWidgetItem *item = new QListWidgetItem();
item->setData(Qt::DecorationRole, thumbnail);
item->setData(Qt::UserRole, image->id());
item->setSizeHint(QSize(220, 180));
addItem(item);
}
int ThumbnailsView::currentImageId()
{
QListWidgetItem *curItem = currentItem();
if (curItem)
return curItem->data(Qt::UserRole).toInt();
return 0;
}
void ThumbnailsView::removeCurrentImage()
{
takeItem(indexFromItem(currentItem()).row());
}
void ThumbnailsView::mousePressEvent(QMouseEvent *event)
{
if (Qt::LeftButton == event->button())
{
_beginPos=event->pos();
}
QListWidget::mousePressEvent(event);
}
void ThumbnailsView::mouseMoveEvent(QMouseEvent *e)
{
int distance = (e->pos()-_beginPos).manhattanLength();
if ((e->buttons() & Qt::LeftButton) &&
distance >= QApplication::startDragDistance() &&
currentItem())
{
QMimeData *mimeData = new QMimeData;
mimeData->setText(currentItem()->text());
QDrag *drag=new QDrag(this);
drag->setMimeData(mimeData);
QImage image;
if (true == image.load(":/Images/images/32/tag_add.png"))
drag->setPixmap(QPixmap::fromImage(image));
drag->exec(Qt::CopyAction);
}
else
return;//防止item位置移动
QListWidget::mouseMoveEvent(e);
}