A strange problem with QGraphicsSvgItem

[Justin_W]

I'm a beginner with Qt programming. I'm now programming a procedure about QGraphicsScene and QGraphicsSvgItem.But today i meet a very stange problem:I consider when one item(QGraphicsSvgItem in QGraphicsScene) is selected, there 's a dashed-line frame the item,isn't it?
i have set the flag:setFlag(QGraphicsItem::ItemIsSelectable,ture) ;
and the dashed-line did appeared.

But the problem is when the item is unselected,the dashed-line still shows!
Just like this:

I have writed some code to detect whether the items were unselected.
and it showed all the items were unselected.
but why they already have dashed-line frame?
who can tell me why?

[aamer4yu]

Can you show us the code for what u are doing on item selected and item deselected ??

[Justin_W]

I don't know the principle of how the dashed-line frame is shown very clearly.
I just set the flag "ItemIsSelectable" to Item in construct function:

SvgShapeItem(QString &Name,QString &File,Mode mode,QMenu *ContextMenu,QGraphicsItem *parent=0): QGraphicsSvgItem(File,parent)
{
     ShapeName=Name;
     FileName=File;
     myMode=mode;
     myContextMenu=ContextMenu;
     setFlag(QGraphicsItem::ItemIsMoveable,true);
     setFlag(QGraphicsItem::ItemIsSelectable,true);
}

SvgShapeItem(QString &Name,QString &File,Mode mode,QMenu *ContextMenu,QGraphicsItem *parent=0): QGraphicsSvgItem(File,parent)
{
     ShapeName=Name;
     FileName=File;
     myMode=mode;
     myContextMenu=ContextMenu;
     setFlag(QGraphicsItem::ItemIsMoveable,true);
     setFlag(QGraphicsItem::ItemIsSelectable,true);
}

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and i have no other codes to select or deselect the item.I dont konw how?
Need i do something else?

Thanks a lot for your reply!

[Justin_W]

Can you show us the code for what u are doing on item selected and item deselected ??

SvgShapeItem(QString &Name,QString &File,Mode mode,QMenu *ContextMenu,QGraphicsItem *parent=0): QGraphicsSvgItem(File,parent)
{
     ShapeName=Name;
     FileName=File;
     myMode=mode;
     myContextMenu=ContextMenu;
     setFlag(QGraphicsItem::ItemIsMoveable,true);
     setFlag(QGraphicsItem::ItemIsSelectable,true);
}

SvgShapeItem(QString &Name,QString &File,Mode mode,QMenu *ContextMenu,QGraphicsItem *parent=0): QGraphicsSvgItem(File,parent)
{
     ShapeName=Name;
     FileName=File;
     myMode=mode;
     myContextMenu=ContextMenu;
     setFlag(QGraphicsItem::ItemIsMoveable,true);
     setFlag(QGraphicsItem::ItemIsSelectable,true);
}

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[Justin_W]

And I added a QGraphicsPolygonItem with the same method, there' no such problem with QGraphicsPolygonItem,is it a dug of QT?

[aamer4yu]

Am not sure if its a prob with svg items.
What are u doing in the paint() function of the svg item ??

[Justin_W]

I did nothing with paint() function.What need i do in this function?
I find another strange thing that when i change the scale of QGraphicsView,the dashed-line box disappeared normally.