sortingbox.cpp Example File

widgets/tooltips/sortingbox.cpp
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#include <QtWidgets> #include <stdlib.h> #include "sortingbox.h" SortingBox::SortingBox() { setMouseTracking(true); setBackgroundRole(QPalette::Base); itemInMotion = 0; newCircleButton = createToolButton(tr("New Circle"), QIcon(":/images/circle.png"), SLOT(createNewCircle())); newSquareButton = createToolButton(tr("New Square"), QIcon(":/images/square.png"), SLOT(createNewSquare())); newTriangleButton = createToolButton(tr("New Triangle"), QIcon(":/images/triangle.png"), SLOT(createNewTriangle())); circlePath.addEllipse(QRect(0, 0, 100, 100)); squarePath.addRect(QRect(0, 0, 100, 100)); qreal x = trianglePath.currentPosition().x(); qreal y = trianglePath.currentPosition().y(); trianglePath.moveTo(x + 120 / 2, y); trianglePath.lineTo(0, 100); trianglePath.lineTo(120, 100); trianglePath.lineTo(x + 120 / 2, y); setWindowTitle(tr("Tool Tips")); resize(500, 300); createShapeItem(circlePath, tr("Circle"), initialItemPosition(circlePath), initialItemColor()); createShapeItem(squarePath, tr("Square"), initialItemPosition(squarePath), initialItemColor()); createShapeItem(trianglePath, tr("Triangle"), initialItemPosition(trianglePath), initialItemColor()); } bool SortingBox::event(QEvent *event) { if (event->type() == QEvent::ToolTip) { QHelpEvent *helpEvent = static_cast<QHelpEvent *>(event); int index = itemAt(helpEvent->pos()); if (index != -1) { QToolTip::showText(helpEvent->globalPos(), shapeItems[index].toolTip()); } else { QToolTip::hideText(); event->ignore(); } return true; } return QWidget::event(event); } void SortingBox::resizeEvent(QResizeEvent * /* event */) { int margin = style()->pixelMetric(QStyle::PM_DefaultTopLevelMargin); int x = width() - margin; int y = height() - margin; y = updateButtonGeometry(newCircleButton, x, y); y = updateButtonGeometry(newSquareButton, x, y); updateButtonGeometry(newTriangleButton, x, y); } void SortingBox::paintEvent(QPaintEvent * /* event */) { QPainter painter(this); painter.setRenderHint(QPainter::Antialiasing); foreach (ShapeItem shapeItem, shapeItems) { painter.translate(shapeItem.position()); painter.setBrush(shapeItem.color()); painter.drawPath(shapeItem.path()); painter.translate(-shapeItem.position()); } } void SortingBox::mousePressEvent(QMouseEvent *event) { if (event->button() == Qt::LeftButton) { int index = itemAt(event->pos()); if (index != -1) { itemInMotion = &shapeItems[index]; previousPosition = event->pos(); shapeItems.move(index, shapeItems.size() - 1); update(); } } } void SortingBox::mouseMoveEvent(QMouseEvent *event) { if ((event->buttons() & Qt::LeftButton) && itemInMotion) moveItemTo(event->pos()); } void SortingBox::mouseReleaseEvent(QMouseEvent *event) { if (event->button() == Qt::LeftButton && itemInMotion) { moveItemTo(event->pos()); itemInMotion = 0; } } void SortingBox::createNewCircle() { static int count = 1; createShapeItem(circlePath, tr("Circle <%1>").arg(++count), randomItemPosition(), randomItemColor()); } void SortingBox::createNewSquare() { static int count = 1; createShapeItem(squarePath, tr("Square <%1>").arg(++count), randomItemPosition(), randomItemColor()); } void SortingBox::createNewTriangle() { static int count = 1; createShapeItem(trianglePath, tr("Triangle <%1>").arg(++count), randomItemPosition(), randomItemColor()); } int SortingBox::itemAt(const QPoint &pos) { for (int i = shapeItems.size() - 1; i >= 0; --i) { const ShapeItem &item = shapeItems[i]; if (item.path().contains(pos - item.position())) return i; } return -1; } void SortingBox::moveItemTo(const QPoint &pos) { QPoint offset = pos - previousPosition; itemInMotion->setPosition(itemInMotion->position() + offset); previousPosition = pos; update(); } int SortingBox::updateButtonGeometry(QToolButton *button, int x, int y) { QSize size = button->sizeHint(); button->setGeometry(x - size.rwidth(), y - size.rheight(), size.rwidth(), size.rheight()); return y - size.rheight() - style()->pixelMetric(QStyle::PM_DefaultLayoutSpacing); } void SortingBox::createShapeItem(const QPainterPath &path, const QString &toolTip, const QPoint &pos, const QColor &color) { ShapeItem shapeItem; shapeItem.setPath(path); shapeItem.setToolTip(toolTip); shapeItem.setPosition(pos); shapeItem.setColor(color); shapeItems.append(shapeItem); update(); } QToolButton *SortingBox::createToolButton(const QString &toolTip, const QIcon &icon, const char *member) { QToolButton *button = new QToolButton(this); button->setToolTip(toolTip); button->setIcon(icon); button->setIconSize(QSize(32, 32)); connect(button, SIGNAL(clicked()), this, member); return button; } QPoint SortingBox::initialItemPosition(const QPainterPath &path) { int x; int y = (height() - (int)path.controlPointRect().height()) / 2; if (shapeItems.size() == 0) x = ((3 * width()) / 2 - (int)path.controlPointRect().width()) / 2; else x = (width() / shapeItems.size() - (int)path.controlPointRect().width()) / 2; return QPoint(x, y); } QPoint SortingBox::randomItemPosition() { return QPoint(QRandomGenerator::global()->bounded(width() - 120), QRandomGenerator::global()->bounded(height() - 120)); } QColor SortingBox::initialItemColor() { return QColor::fromHsv(((shapeItems.size() + 1) * 85) % 256, 255, 190); } QColor SortingBox::randomItemColor() { return QColor::fromHsv(QRandomGenerator::global()->bounded(256), 255, 190); }