Example.zip

#include "scgridreszablerectitem.h" #define minLength 15 const QLineF m_rectLineFs[] = { QLineF(0.0, 0.0, 1.0, 0.0), QLineF(1.0, 0.0, 1.0, 1.0), QLineF(0.0, 1.0, 1.0, 1.0), QLineF(0.0, 0.0, 0.0, 1.0) }; const QColor m_colors[] = { QColor("#25a061"), QColor("#4e8df1"), QColor("#db524a"), QColor("#fecd52") }; SCLineItem::SCLineItem(qreal x1, qreal y1, qreal x2, qreal y2, QGraphicsItem *parent) { setLine(x1,y1,x2,y2); setParentItem(parent); setAcceptHoverEvents(true); setFlag(QGraphicsItem::ItemIsMovable, true); // setFlag(QGraphicsItem::ItemIsSelectable, true); setFlag(QGraphicsItem::ItemIsFocusable, true); } bool SCLineItem::isVertical() const { return m_isVertical; } bool SCLineItem::getSelected() const { return m_selected; } void SCLineItem::setSelected(bool selected) { m_selected = selected; } void SCLineItem::setDefaulColor(const QColor &defaulColor) { m_defaulColor = defaulColor; } void SCLineItem::setSelectedColor(const QColor &selectedColor) { m_selectedColor = selectedColor; } void SCLineItem::setSize(const QSizeF &size) { m_size = size; } void SCLineItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) { painter->setPen(Qt::red); if(getSelected()){ painter->setRenderHint(QPainter::Antialiasing, true); painter->setPen(m_selectedColor); painter->drawLine(line()); painter->setRenderHint(QPainter::Antialiasing, false); } else{ painter->setRenderHint(QPainter::Antialiasing, true); painter->setPen(m_defaulColor); painter->drawLine(line()); painter->setRenderHint(QPainter::Antialiasing, false); } } void SCLineItem::hoverMoveEvent(QGraphicsSceneHoverEvent *event) { if(m_canMove && (m_resizing || (contains(event->pos()) && isSelected()))){ if(isVertical()){ setCursor(Qt::SizeHorCursor); } else{ setCursor(Qt::SizeVerCursor); } } else{ setCursor(Qt::ArrowCursor); } QGraphicsItem::hoverMoveEvent(event); } void SCLineItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) { if(m_resizing && m_canMove){ QPointF p = event->pos(); qreal w = m_size.width(); qreal h = m_size.height(); if(isVertical()){ moveBy(-(m_point.x() - p.x()), 0); setPos(qMax(-w/2.0, qMin(pos().x(), w/2.0)), 0); } else{ moveBy(0, -(m_point.y() - p.y())); setPos(0, qMax(-h/2.0, qMin(pos().y(), h/2.0))); } } else QGraphicsItem::mouseMoveEvent(event); } void SCLineItem::mousePressEvent(QGraphicsSceneMouseEvent *event) { static qreal z = 0.0; setZValue(z+=1.0); m_point = event->pos(); if(event->button() == Qt::LeftButton && contains(event->pos())){ m_resizing = true; } QGraphicsItem::mousePressEvent(event); } void SCLineItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) { if(event->button() == Qt::LeftButton && contains(event->pos())){ m_resizing = false; } else QGraphicsItem::mouseReleaseEvent(event); } void SCLineItem::setIsVertical(bool isVertical) { m_isVertical = isVertical; } SCGridReszableRectItem::SCGridReszableRectItem(SCGridReszableRectItem::GRID_TYPE type) { setPos(0,0); initSetting(type); } SCGridReszableRectItem::SCGridReszableRectItem(SCGridReszableRectItem::GRID_TYPE type, int x, int y) { setPos(x,y); initSetting(type); } SCGridReszableRectItem::SCGridReszableRectItem(SCGridReszableRectItem::GRID_TYPE type, int x, int y, qreal width, qreal height) { setPos(x,y); m_size.setWidth(width); m_size.setHeight(height); initSetting(type); } SCGridReszableRectItem::~SCGridReszableRectItem() { } QRectF SCGridReszableRectItem::boundingRect() const { return QRectF(0,0,m_size.width(), m_size.height()); } void SCGridReszableRectItem::setSize(const QSizeF &size) { m_size = size; } void SCGridReszableRectItem::setScale(const qreal &scaleX, const qreal &scaleY) { m_scaleX = scaleX; m_scaleY = scaleY; qreal w = m_size.width(); qreal h = m_size.height(); m_size.setWidth(w * scaleX); m_size.setHeight(h * scaleY); } void SCGridReszableRectItem::setItemSelected(bool selected) { setSelected(selected); prepareGeometryChange(); } void SCGridReszableRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) { painter->setPen(m_defaulColor); QRectF rectF = QRectF(1,1,m_size.width(), m_size.height()); if(option->state & QStyle::State_Selected){ painter->setRenderHint(QPainter::Antialiasing, true); painter->setPen(m_selectedColor); updateLineItems(); painter->drawRect(rectF); painter->setRenderHint(QPainter::Antialiasing, false); } else{ painter->drawRect(rectF); updateLineItems(); } } void SCGridReszableRectItem::hoverMoveEvent(QGraphicsSceneHoverEvent *event) { if(isSelected()){ m_curItemType = getCursorPosition(event->pos()); switch (m_curItemType) { case ITEM_TYPE::TOP: setCursor(Qt::SizeVerCursor); break; case ITEM_TYPE::BOTTOM: setCursor(Qt::SizeVerCursor); break; case ITEM_TYPE::LEFT: setCursor(Qt::SizeHorCursor); break; case ITEM_TYPE::RIGHT: setCursor(Qt::SizeHorCursor); break; case ITEM_TYPE::CENTER: setCursor(Qt::ArrowCursor); break; } } else{ setCursor(Qt::ArrowCursor); } QGraphicsItem::hoverMoveEvent(event); } void SCGridReszableRectItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) { if(m_resizing){ qreal x = pos().x(); qreal y = pos().y(); qreal eventX = event->pos().x(); qreal eventY = event->pos().y(); qreal moveX = 0; qreal moveY = 0; qreal newW = m_size.width(); qreal newH = m_size.height(); QRectF rect = scene()->sceneRect(); switch (m_curItemType) { case ITEM_TYPE::TOP: moveY = qMax(-y, eventY); newH = m_size.height() - moveY; break; case ITEM_TYPE::BOTTOM: newH = qMin(eventY, rect.height() - 2 - y); break; case ITEM_TYPE::LEFT: moveX = qMax(-x, eventX); newW = m_size.width() - moveX; break; case ITEM_TYPE::RIGHT: newW = qMin(eventX, rect.width() - 2 - x); break; case ITEM_TYPE::CENTER: break; } if(newH<minLength || newW<minLength) return; moveBy(moveX, moveY); m_size.setWidth(newW); m_size.setHeight(newH); prepareGeometryChange(); } else{ qreal moveX = 0; qreal moveY = 0; qreal eventX = event->pos().x(); qreal eventY = event->pos().y(); moveY = m_originPos.y() - eventY; moveX = m_originPos.x() - eventX; moveOutSide(-moveX, -moveY); } } void SCGridReszableRectItem::mousePressEvent(QGraphicsSceneMouseEvent *event) { static qreal z = 0; setZValue(z += 1.0); m_originPos = event->pos(); if(event->button() == Qt::LeftButton && getCursorPosition(event->pos()) != ITEM_TYPE::CENTER){ m_resizing = true; } else QGraphicsItem::mousePressEvent(event); } void SCGridReszableRectItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) { if(event->button() == Qt::LeftButton && getCursorPosition(event->pos()) != ITEM_TYPE::CENTER){ m_resizing = false; } else QGraphicsItem::mousePressEvent(event); } QVariant SCGridReszableRectItem::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value) { if(change == ItemSelectedChange && scene()){ if(value == 1