diff options
Diffstat (limited to 'tests/manual/highdpi/kitchensink/dragwidget.cpp')
| -rw-r--r-- | tests/manual/highdpi/kitchensink/dragwidget.cpp | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/tests/manual/highdpi/kitchensink/dragwidget.cpp b/tests/manual/highdpi/kitchensink/dragwidget.cpp new file mode 100644 index 0000000000..bd65fcf81b --- /dev/null +++ b/tests/manual/highdpi/kitchensink/dragwidget.cpp @@ -0,0 +1,221 @@ +/**************************************************************************** + ** + ** Copyright (C) 2016 The Qt Company Ltd. + ** Contact: https://www.qt.io/licensing/ + ** + ** This file is part of the test suite of the Qt Toolkit. + ** + ** $QT_BEGIN_LICENSE:GPL-EXCEPT$ + ** Commercial License Usage + ** Licensees holding valid commercial Qt licenses may use this file in + ** accordance with the commercial license agreement provided with the + ** Software or, alternatively, in accordance with the terms contained in + ** a written agreement between you and The Qt Company. For licensing terms + ** and conditions see https://www.qt.io/terms-conditions. For further + ** information use the contact form at https://www.qt.io/contact-us. + ** + ** GNU General Public License Usage + ** Alternatively, this file may be used under the terms of the GNU + ** General Public License version 3 as published by the Free Software + ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT + ** included in the packaging of this file. Please review the following + ** information to ensure the GNU General Public License requirements will + ** be met: https://www.gnu.org/licenses/gpl-3.0.html. + ** + ** $QT_END_LICENSE$ + ** + ****************************************************************************/ + +#include <QtWidgets> +#include "dragwidget.h" + +class FramedLabel : public QLabel +{ +public: + FramedLabel(const QString &text, QWidget *parent) + : QLabel(text, parent) + { + setAutoFillBackground(true); + setFrameShape(QFrame::Panel); + setFrameShadow(QFrame::Raised); + } +}; + +DragWidget::DragWidget(QString text, QWidget *parent) + : QWidget(parent) +{ + int x = 5; + int y = 5; + + bool createChildWindow = text.isEmpty(); // OK, yes this is a hack... + if (text.isEmpty()) + text = "You can drag from this window and drop text here"; + + QStringList words = text.split(' '); + for (const QString &word : words) { + if (!word.isEmpty()) { + auto wordLabel = new FramedLabel(word, this); + wordLabel->move(x, y); + wordLabel->show(); + x += wordLabel->width() + 2; + if (x >= 245) { + x = 5; + y += wordLabel->height() + 2; + } + } + } + + /* + QPalette newPalette = palette(); + newPalette.setColor(QPalette::Window, Qt::white); + setPalette(newPalette); + */ + + setAcceptDrops(true); + setMinimumSize(400, qMax(200, y)); + setWindowTitle(tr("Draggable Text Window %1").arg(createChildWindow ? 1 : 2)); + if (createChildWindow) + otherWindow = new DragWidget("Here is a second window that accepts drops"); +} + +void DragWidget::dragEnterEvent(QDragEnterEvent *event) +{ + if (event->mimeData()->hasText()) { + if (event->source() == this) { + event->setDropAction(Qt::MoveAction); + event->accept(); + } else { + event->acceptProposedAction(); + } + } else { + event->ignore(); + } +} + +void DragWidget::dragMoveEvent(QDragMoveEvent * event) +{ + dragPos = event->pos(); + dragTimer.start(500, this); + update(); +} + +void DragWidget::dragLeaveEvent(QDragLeaveEvent *) +{ + dragTimer.stop(); + update(); +} + +void DragWidget::dropEvent(QDropEvent *event) +{ + if (event->mimeData()->hasText()) { + const QMimeData *mime = event->mimeData(); + QStringList pieces = mime->text().split(QRegularExpression("\\s+"), + Qt::SkipEmptyParts); + QPoint position = event->pos(); + QPoint hotSpot; + + QList<QByteArray> hotSpotPos = mime->data("application/x-hotspot").split(' '); + if (hotSpotPos.size() == 2) { + hotSpot.setX(hotSpotPos.first().toInt()); + hotSpot.setY(hotSpotPos.last().toInt()); + } + dropPos = position - hotSpot; + dropTimer.start(500, this); + update(); + + foreach (QString piece, pieces) { + FramedLabel *newLabel = new FramedLabel(piece, this); + newLabel->move(position - hotSpot); + newLabel->show(); + + position += QPoint(newLabel->width(), 0); + } + + if (event->source() == this) { + event->setDropAction(Qt::MoveAction); + event->accept(); + } else { + event->acceptProposedAction(); + } + } else { + event->ignore(); + } + for (QObject *child : children()) { + if (child->isWidgetType()) { + auto widget = static_cast<QWidget *>(child); + if (!widget->isVisible()) + widget->deleteLater(); + } + } +} + +void DragWidget::mousePressEvent(QMouseEvent *event) +{ + QLabel *child = static_cast<QLabel*>(childAt(event->pos())); + if (!child) + return; + + QPoint hotSpot = event->pos() - child->pos(); + + QMimeData *mimeData = new QMimeData; + mimeData->setText(child->text()); + mimeData->setData("application/x-hotspot", + QByteArray::number(hotSpot.x()) + ' ' + QByteArray::number(hotSpot.y())); + + const qreal dpr = devicePixelRatio() > 1 && !(QGuiApplication::keyboardModifiers() & Qt::ShiftModifier) + ? devicePixelRatio() : 1; + + QPixmap pixmap(child->size() * dpr); + pixmap.setDevicePixelRatio(dpr); + child->render(&pixmap); + + auto drag = new QDrag(this); + drag->setMimeData(mimeData); + drag->setPixmap(pixmap); + drag->setHotSpot(hotSpot); + + Qt::DropAction dropAction = drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction); + + if (dropAction == Qt::MoveAction) + child->close(); +} + +void DragWidget::timerEvent(QTimerEvent *e) +{ + if (e->timerId() == dragTimer.timerId()) + dragTimer.stop(); + if (e->timerId() == dropTimer.timerId()) + dropTimer.stop(); + update(); +} + +void DragWidget::paintEvent(QPaintEvent *) +{ + QPainter p(this); + p.fillRect(rect(), Qt::white); + + if (dropTimer.isActive()) { + p.setBrush(Qt::red); + p.drawEllipse(dropPos, 50, 50); + } + + if (dragTimer.isActive()) { + p.setPen(QPen(Qt::blue, 5)); + QPoint p1 = (rect().topLeft()*3 + rect().bottomRight())/4; + QPoint p2 = (rect().topLeft() + rect().bottomRight()*3)/4; + p.drawLine(p1, dragPos); + p.drawLine(p2, dragPos); + } +} + +void DragWidget::showEvent(QShowEvent *) +{ + if (otherWindow) + otherWindow->show(); +} + +void DragWidget::hideEvent(QHideEvent *) +{ + if (otherWindow) + otherWindow->hide(); +} |