forked from qt-creator/qt-creator
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
#include "subcomponentmasklayeritem.h"
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#include "qmlviewerconstants.h"
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#include "qdeclarativedesignview.h"
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#include <QPolygonF>
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namespace QmlViewer {
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SubcomponentMaskLayerItem::SubcomponentMaskLayerItem(QDeclarativeDesignView *view, QGraphicsItem *parentItem) :
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QGraphicsPolygonItem(parentItem),
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m_view(view),
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m_currentItem(0),
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m_borderRect(new QGraphicsRectItem(this))
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{
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m_borderRect->setRect(0,0,0,0);
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m_borderRect->setPen(QPen(QColor(60, 60, 60), 1));
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m_borderRect->setData(Constants::EditorItemDataKey, QVariant(true));
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setBrush(QBrush(QColor(160,160,160)));
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setPen(Qt::NoPen);
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}
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int SubcomponentMaskLayerItem::type() const
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{
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return Constants::EditorItemType;
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}
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static QRectF resizeRect(const QRectF &newRect, const QRectF &oldRect)
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{
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QRectF result = newRect;
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if (oldRect.left() < newRect.left())
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result.setLeft(oldRect.left());
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if (oldRect.top() < newRect.top())
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result.setTop(oldRect.top());
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if (oldRect.right() > newRect.right())
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result.setRight(oldRect.right());
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if (oldRect.bottom() > newRect.bottom())
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result.setBottom(oldRect.bottom());
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return result;
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}
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void SubcomponentMaskLayerItem::setCurrentItem(QGraphicsItem *item)
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{
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QGraphicsItem *prevItem = m_currentItem;
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m_currentItem = item;
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if (!m_currentItem)
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return;
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QPolygonF viewPoly(QRectF(m_view->rect()));
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viewPoly = m_view->mapToScene(viewPoly.toPolygon());
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QRectF itemRect = item->boundingRect() | item->childrenBoundingRect();
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QPolygonF itemPoly(itemRect);
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itemPoly = item->mapToScene(itemPoly);
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// if updating the same item as before, resize the rectangle only bigger, not smaller.
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if (prevItem == item && prevItem != 0) {
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m_itemPolyRect = resizeRect(itemPoly.boundingRect(), m_itemPolyRect);
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} else {
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m_itemPolyRect = itemPoly.boundingRect();
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}
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QRectF borderRect = m_itemPolyRect;
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borderRect.adjust(-1, -1, 1, 1);
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m_borderRect->setRect(borderRect);
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itemPoly = viewPoly.subtracted(QPolygonF(m_itemPolyRect));
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setPolygon(itemPoly);
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}
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QGraphicsItem *SubcomponentMaskLayerItem::currentItem() const
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{
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return m_currentItem;
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}
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} // namespace QmlViewer
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