qmldebugcontrol/qmljsdebugger/editor/subcomponentmasklayeritem.cpp

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  32
  33 #include "subcomponentmasklayeritem.h"
  34 #include "qmlinspectorconstants.h"
  35 #include "qdeclarativeviewinspector.h"
  36 #include <QtGui/QPolygonF>
  37
  38 namespace QmlJSDebugger {
  39
  40 SubcomponentMaskLayerItem::SubcomponentMaskLayerItem(QDeclarativeViewInspector *inspector,
  41                                                      QGraphicsItem *parentItem) :
  42     QGraphicsPolygonItem(parentItem),
  43     m_inspector(inspector),
  44     m_currentItem(0),
  45     m_borderRect(new QGraphicsRectItem(this))
  46 {
  47     m_borderRect->setRect(0,0,0,0);
  48     m_borderRect->setPen(QPen(QColor(60, 60, 60), 1));
  49     m_borderRect->setData(Constants::EditorItemDataKey, QVariant(true));
  50
  51     setBrush(QBrush(QColor(160,160,160)));
  52     setPen(Qt::NoPen);
  53 }
  54
  55 int SubcomponentMaskLayerItem::type() const
  56 {
  57     return Constants::EditorItemType;
  58 }
  59
  60 static QRectF resizeRect(const QRectF &newRect, const QRectF &oldRect)
  61 {
  62     QRectF result = newRect;
  63     if (oldRect.left() < newRect.left())
  64         result.setLeft(oldRect.left());
  65
  66     if (oldRect.top() < newRect.top())
  67         result.setTop(oldRect.top());
  68
  69     if (oldRect.right() > newRect.right())
  70         result.setRight(oldRect.right());
  71
  72     if (oldRect.bottom() > newRect.bottom())
  73         result.setBottom(oldRect.bottom());
  74
  75     return result;
  76 }
  77
  78 static QPolygonF regionToPolygon(const QRegion &region)
  79 {
  80     QPainterPath path;
  81     foreach (const QRect &rect, region.rects())
  82         path.addRect(rect);
  83     return path.toFillPolygon();
  84 }
  85
  86 void SubcomponentMaskLayerItem::setCurrentItem(QGraphicsItem *item)
  87 {
  88     QGraphicsItem *prevItem = m_currentItem;
  89     m_currentItem = item;
  90
  91     if (!m_currentItem)
  92         return;
  93
  94     QRect viewRect = m_inspector->declarativeView()->rect();
  95     viewRect = m_inspector->declarativeView()->mapToScene(viewRect).boundingRect().toRect();
  96
  97     QRectF itemRect = item->boundingRect() | item->childrenBoundingRect();
  98     itemRect = item->mapRectToScene(itemRect);
  99
 100     // if updating the same item as before, resize the rectangle only bigger, not smaller.
 101     if (prevItem == item && prevItem != 0) {
 102         m_itemPolyRect = resizeRect(itemRect, m_itemPolyRect);
 103     } else {
 104         m_itemPolyRect = itemRect;
 105     }
 106     QRectF borderRect = m_itemPolyRect;
 107     borderRect.adjust(-1, -1, 1, 1);
 108     m_borderRect->setRect(borderRect);
 109
 110     const QRegion externalRegion = QRegion(viewRect).subtracted(m_itemPolyRect.toRect());
 111     setPolygon(regionToPolygon(externalRegion));
 112 }
 113
 114 QGraphicsItem *SubcomponentMaskLayerItem::currentItem() const
 115 {
 116     return m_currentItem;
 117 }
 118
 119 } // namespace QmlJSDebugger
 120