diff options
author | Friedemann Kleint <Friedemann.Kleint@qt.io> | 2017-08-24 11:19:21 +0200 |
---|---|---|
committer | Friedemann Kleint <Friedemann.Kleint@qt.io> | 2017-10-18 10:31:44 +0000 |
commit | 879f98106d5974ef19c96cb228ca032701b94556 (patch) | |
tree | 1629483c8f6367cd0c9404a0147e9885602533d8 /examples/widgets/draganddrop/puzzle/puzzlewidget.cpp | |
parent | 3fe74b76fd0eaf39d4c6681e2edca5adbf107883 (diff) |
Revamp QtWidgets/DragAndDrop examples to C++11
Introduce nullptr and replace foreach with new C++11 range based for
loops. Minor fixups of signals, file dialog usage.
Apply the same changes to the ItemViews/puzzle example since it
shares parts of the code with DragAndDrop/puzzle. Make some
changes to both examples to that the diff of the two becomes
small for easier comparison.
Task-number: QTBUG-60635
Change-Id: I8af824229ebac24d6ec151eae92176d227695490
Reviewed-by: Venugopal Shivashankar <Venugopal.Shivashankar@qt.io>
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
Diffstat (limited to 'examples/widgets/draganddrop/puzzle/puzzlewidget.cpp')
-rw-r--r-- | examples/widgets/draganddrop/puzzle/puzzlewidget.cpp | 65 |
1 files changed, 31 insertions, 34 deletions
diff --git a/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp b/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp index 2093d7820c..72f2662bce 100644 --- a/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp +++ b/examples/widgets/draganddrop/puzzle/puzzlewidget.cpp @@ -66,9 +66,7 @@ PuzzleWidget::PuzzleWidget(int imageSize, QWidget *parent) void PuzzleWidget::clear() { - pieceLocations.clear(); - piecePixmaps.clear(); - pieceRects.clear(); + pieces.clear(); highlightedRect = QRect(); inPlace = 0; update(); @@ -95,7 +93,7 @@ void PuzzleWidget::dragMoveEvent(QDragMoveEvent *event) QRect updateRect = highlightedRect.united(targetSquare(event->pos())); if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType()) - && pieceRects.indexOf(targetSquare(event->pos())) == -1) { + && findPiece(targetSquare(event->pos())) == -1) { highlightedRect = targetSquare(event->pos()); event->setDropAction(Qt::MoveAction); @@ -111,26 +109,23 @@ void PuzzleWidget::dragMoveEvent(QDragMoveEvent *event) void PuzzleWidget::dropEvent(QDropEvent *event) { if (event->mimeData()->hasFormat(PiecesList::puzzleMimeType()) - && pieceRects.indexOf(targetSquare(event->pos())) == -1) { + && findPiece(targetSquare(event->pos())) == -1) { QByteArray pieceData = event->mimeData()->data(PiecesList::puzzleMimeType()); QDataStream dataStream(&pieceData, QIODevice::ReadOnly); - QRect square = targetSquare(event->pos()); - QPixmap pixmap; - QPoint location; - dataStream >> pixmap >> location; + Piece piece; + piece.rect = targetSquare(event->pos()); + dataStream >> piece.pixmap >> piece.location; - pieceLocations.append(location); - piecePixmaps.append(pixmap); - pieceRects.append(square); + pieces.append(piece); highlightedRect = QRect(); - update(square); + update(piece.rect); event->setDropAction(Qt::MoveAction); event->accept(); - if (location == QPoint(square.x()/pieceSize(), square.y()/pieceSize())) { + if (piece.location == piece.rect.topLeft() / pieceSize()) { inPlace++; if (inPlace == 25) emit puzzleCompleted(); @@ -141,21 +136,26 @@ void PuzzleWidget::dropEvent(QDropEvent *event) } } +int PuzzleWidget::findPiece(const QRect &pieceRect) const +{ + for (int i = 0, size = pieces.size(); i < size; ++i) { + if (pieces.at(i).rect == pieceRect) + return i; + } + return -1; +} + void PuzzleWidget::mousePressEvent(QMouseEvent *event) { QRect square = targetSquare(event->pos()); - int found = pieceRects.indexOf(square); + const int found = findPiece(square); if (found == -1) return; - QPoint location = pieceLocations[found]; - QPixmap pixmap = piecePixmaps[found]; - pieceLocations.removeAt(found); - piecePixmaps.removeAt(found); - pieceRects.removeAt(found); + Piece piece = pieces.takeAt(found); - if (location == QPoint(square.x()/pieceSize(), square.y()/pieceSize())) + if (piece.location == square.topLeft() / pieceSize()) inPlace--; update(square); @@ -163,7 +163,7 @@ void PuzzleWidget::mousePressEvent(QMouseEvent *event) QByteArray itemData; QDataStream dataStream(&itemData, QIODevice::WriteOnly); - dataStream << pixmap << location; + dataStream << piece.pixmap << piece.location; QMimeData *mimeData = new QMimeData; mimeData->setData(PiecesList::puzzleMimeType(), itemData); @@ -171,23 +171,20 @@ void PuzzleWidget::mousePressEvent(QMouseEvent *event) QDrag *drag = new QDrag(this); drag->setMimeData(mimeData); drag->setHotSpot(event->pos() - square.topLeft()); - drag->setPixmap(pixmap); + drag->setPixmap(piece.pixmap); - if (!(drag->exec(Qt::MoveAction) == Qt::MoveAction)) { - pieceLocations.insert(found, location); - piecePixmaps.insert(found, pixmap); - pieceRects.insert(found, square); + if (drag->exec(Qt::MoveAction) != Qt::MoveAction) { + pieces.insert(found, piece); update(targetSquare(event->pos())); - if (location == QPoint(square.x()/pieceSize(), square.y()/pieceSize())) + if (piece.location == square.topLeft() / pieceSize()) inPlace++; } } void PuzzleWidget::paintEvent(QPaintEvent *event) { - QPainter painter; - painter.begin(this); + QPainter painter(this); painter.fillRect(event->rect(), Qt::white); if (highlightedRect.isValid()) { @@ -196,14 +193,14 @@ void PuzzleWidget::paintEvent(QPaintEvent *event) painter.drawRect(highlightedRect.adjusted(0, 0, -1, -1)); } - for (int i = 0; i < pieceRects.size(); ++i) - painter.drawPixmap(pieceRects[i], piecePixmaps[i]); - painter.end(); + for (const Piece &piece : pieces) + painter.drawPixmap(piece.rect, piece.pixmap); } const QRect PuzzleWidget::targetSquare(const QPoint &position) const { - return QRect(position.x()/pieceSize() * pieceSize(), position.y()/pieceSize() * pieceSize(), pieceSize(), pieceSize()); + return QRect(position / pieceSize() * pieceSize(), + QSize(pieceSize(), pieceSize())); } int PuzzleWidget::pieceSize() const |