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25 
26 #include "contextlabelitem.h"
27 
28 #include <QFontMetricsF>
29 
30 namespace qmt {
31 
ContextLabelItem(QGraphicsItem * parent)32 ContextLabelItem::ContextLabelItem(QGraphicsItem *parent)
33     : QGraphicsSimpleTextItem(parent)
34 {
35 }
36 
~ContextLabelItem()37 ContextLabelItem::~ContextLabelItem()
38 {
39 }
40 
setMaxWidth(double maxWidth)41 void ContextLabelItem::setMaxWidth(double maxWidth)
42 {
43     if (m_maxWidth != maxWidth) {
44         m_maxWidth = maxWidth;
45         update();
46     }
47 }
48 
resetMaxWidth()49 void ContextLabelItem::resetMaxWidth()
50 {
51     if (m_maxWidth != 0.0) {
52         m_maxWidth = 0.0;
53         update();
54     }
55 }
56 
setContext(const QString & context)57 void ContextLabelItem::setContext(const QString &context)
58 {
59     if (m_context != context) {
60         m_context = context;
61         update();
62     }
63 }
64 
height() const65 double ContextLabelItem::height() const
66 {
67     return QFontMetricsF(font()).height();
68 }
69 
update()70 void ContextLabelItem::update()
71 {
72     setText(QString("(from %1)").arg(m_context));
73     if (m_maxWidth > 0.0) {
74         double contextWidth = boundingRect().width();
75         if (contextWidth > m_maxWidth) {
76             setText(QString("(%1)").arg(m_context));
77             contextWidth = boundingRect().width();
78         }
79         if (contextWidth > m_maxWidth) {
80             QFontMetricsF metrics(font());
81             setText(metrics.elidedText(QString("(%1)").arg(m_context), Qt::ElideMiddle, m_maxWidth));
82         }
83     }
84 }
85 
86 } // namespace qmt
87