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50
51#include "droparea.h"
52
53#include <QDragEnterEvent>
54#include <QMimeData>
55
56//! [DropArea constructor]
57DropArea::DropArea(QWidget *parent)
58 : QLabel(parent)
59{
60 setMinimumSize(200, 200);
61 setFrameStyle(QFrame::Sunken | QFrame::StyledPanel);
62 setAlignment(Qt::AlignCenter);
63 setAcceptDrops(true);
64 setAutoFillBackground(true);
65 clear();
66}
67//! [DropArea constructor]
68
69//! [dragEnterEvent() function]
70void DropArea::dragEnterEvent(QDragEnterEvent *event)
71{
72 setText(tr("<drop content>"));
73 setBackgroundRole(QPalette::Highlight);
74
75 event->acceptProposedAction();
76 emit changed(event->mimeData());
77}
78//! [dragEnterEvent() function]
79
80//! [dragMoveEvent() function]
81void DropArea::dragMoveEvent(QDragMoveEvent *event)
82{
83 event->acceptProposedAction();
84}
85//! [dragMoveEvent() function]
86
87//! [dropEvent() function part1]
88void DropArea::dropEvent(QDropEvent *event)
89{
90 const QMimeData *mimeData = event->mimeData();
91//! [dropEvent() function part1]
92
93//! [dropEvent() function part2]
94 if (mimeData->hasImage()) {
95 setPixmap(qvariant_cast<QPixmap>(mimeData->imageData()));
96 } else if (mimeData->hasHtml()) {
97 setText(mimeData->html());
98 setTextFormat(Qt::RichText);
99 } else if (mimeData->hasText()) {
100 setText(mimeData->text());
101 setTextFormat(Qt::PlainText);
102 } else if (mimeData->hasUrls()) {
103 QList<QUrl> urlList = mimeData->urls();
104 QString text;
105 for (int i = 0; i < urlList.size() && i < 32; ++i)
106 text += urlList.at(i).path() + QLatin1Char('\n');
107 setText(text);
108 } else {
109 setText(tr("Cannot display data"));
110 }
111//! [dropEvent() function part2]
112
113//! [dropEvent() function part3]
114 setBackgroundRole(QPalette::Dark);
115 event->acceptProposedAction();
116}
117//! [dropEvent() function part3]
118
119//! [dragLeaveEvent() function]
120void DropArea::dragLeaveEvent(QDragLeaveEvent *event)
121{
122 clear();
123 event->accept();
124}
125//! [dragLeaveEvent() function]
126
127//! [clear() function]
128void DropArea::clear()
129{
130 setText(tr("<drop content>"));
131 setBackgroundRole(QPalette::Dark);
132
133 emit changed();
134}
135//! [clear() function]
136