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128 lines
3.3 KiB
128 lines
3.3 KiB
#include "UBDragableThumbnail.h"
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#include <QPainter>
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#include <QMimeData>
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#include <QDrag>
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UBDraggableThumbnail::UBDraggableThumbnail(QWidget* parent, const QPixmap& pixmap) :
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QFrame(parent)
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, mThumbnail(new QLabel(this))
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, mHBoxLayout(new QHBoxLayout(this))
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{
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setFrameStyle(QFrame::Sunken | QFrame::StyledPanel);
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setAcceptDrops(true);
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//set stylesheet
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setObjectName("DockPaletteWidgetBox");
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setStyleSheet("background:white");
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mHBoxLayout->setAlignment(Qt::AlignHCenter);
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setThumbnail(pixmap);
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setLayout(mHBoxLayout);
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}
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void UBDraggableThumbnail::setThumbnail(const QPixmap& pixmap)
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{
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mThumbnail->setAttribute(Qt::WA_DeleteOnClose);
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setPixmap(pixmap);
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mHBoxLayout->addWidget(mThumbnail);
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}
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void UBDraggableThumbnail::setPixmap(const QPixmap& pixmap)
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{
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mThumbnail->setPixmap(pixmap);
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}
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void UBDraggableThumbnail::dragEnterEvent(QDragEnterEvent *event)
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{
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if (event->mimeData()->hasFormat("application/x-dnditemdata")) {
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if (event->source() == this) {
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event->setDropAction(Qt::MoveAction);
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event->accept();
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} else {
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event->acceptProposedAction();
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}
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} else {
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event->ignore();
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}
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}
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void UBDraggableThumbnail::dragMoveEvent(QDragMoveEvent *event)
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{
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if (event->mimeData()->hasFormat("application/x-dnditemdata")) {
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if (event->source() == this) {
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event->setDropAction(Qt::MoveAction);
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event->accept();
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} else {
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event->acceptProposedAction();
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}
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} else {
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event->ignore();
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}
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}
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void UBDraggableThumbnail::dropEvent(QDropEvent *event)
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{
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if (event->mimeData()->hasFormat("application/x-dnditemdata")) {
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QByteArray itemData = event->mimeData()->data("application/x-dnditemdata");
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QDataStream dataStream(&itemData, QIODevice::ReadOnly);
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QPixmap pixmap;
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QPoint offset;
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dataStream >> pixmap >> offset;
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//don't have to delete previous Thumbnail (Drag'n'Drop behavior with WA_DeleteOnClose attribute will do it)
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mThumbnail = new QLabel(this);
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setThumbnail(pixmap);
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if (event->source() == this) {
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event->setDropAction(Qt::MoveAction);
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event->accept();
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} else {
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event->acceptProposedAction();
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}
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} else {
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event->ignore();
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}
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}
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void UBDraggableThumbnail::mousePressEvent(QMouseEvent *event)
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{
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QLabel *child = static_cast<QLabel*>(childAt(event->pos()));
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if (!child)
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return;
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QPixmap pixmap = *child->pixmap();
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QByteArray itemData;
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QDataStream dataStream(&itemData, QIODevice::WriteOnly);
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dataStream << pixmap << QPoint(event->pos() - child->pos());
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QMimeData *mimeData = new QMimeData;
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mimeData->setData("application/x-dnditemdata", itemData);
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QDrag *drag = new QDrag(this);
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drag->setMimeData(mimeData);
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drag->setPixmap(pixmap);
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drag->setHotSpot(event->pos() - child->pos());
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QPixmap tempPixmap = pixmap;
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QPainter painter;
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painter.begin(&tempPixmap);
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painter.fillRect(pixmap.rect(), QColor(127, 127, 127, 127));
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painter.end();
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child->setPixmap(tempPixmap);
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if (drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction) == Qt::MoveAction)
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child->close();
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else {
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child->show();
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child->setPixmap(pixmap);
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}
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}
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