sakmessageitem.cpp

   1 #include "sakmessageitem.h"
   2
   3 SakMessageItem::SakMessageItem(const QString& message, const QPixmap& p) : QGraphicsItem(0) {
   4     m_rect = QRectF(QPointF(0, 0), QSizeF(800, 200));
   5
   6     setAcceptsHoverEvents(true);
   7     m_p=new QGraphicsPixmapItem(p.scaled(200, 600, Qt::KeepAspectRatio, Qt::SmoothTransformation),this);
   8     m_p->setPos(0,0);
   9
  10     m_t = new QTextDocument;
  11     m_t->setHtml(message);
  12     m_t->setTextWidth(500);
  13
  14     setZValue(-1);
  15     //setFlag(ItemIsMovable, true);
  16     //setFlag(ItemIsSelectable, true);
  17 }
  18
  19 SakMessageItem::~SakMessageItem()
  20 {
  21      delete m_p;
  22      delete m_t;
  23 }
  24
  25 void SakMessageItem::setGeometry(const QRect& r) {
  26     prepareGeometryChange();
  27     double xratio = r.width() / 800.0;
  28     double yratio = r.height() / 200.0;
  29     double ratio = qMin(xratio, yratio);
  30     QTransform t;
  31     t.scale(ratio, ratio);
  32     setTransform(t);
  33     setPos( 0, 0 );
  34     m_cachedPixmap  = QPixmap();
  35 }
  36
  37 void SakMessageItem::paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * )
  38 {
  39     if (m_cachedPixmap.isNull()) {
  40         m_cachedPixmap = QPixmap(QSize((int)m_rect.width(), (int)m_rect.height()));
  41         m_cachedPixmap.fill(QColor(255,255,255,0));
  42         QPainter p(&m_cachedPixmap);
  43
  44         int m_border=20;
  45         QPen pen;
  46         pen.setWidth(4);
  47         pen.setColor(QColor(Qt::white).darker(150));
  48         p.setPen(pen);
  49         p.setBrush(Qt::white);
  50
  51         QPainterPath path;
  52         int curve = 15;
  53         qreal w = 300 + qMin(600.0, m_t->documentLayout()->documentSize().width());
  54         qreal h = qMax(80.0+m_border+curve, qMin(200.0, m_t->documentLayout()->documentSize().height() + 20));
  55         path.moveTo(200 + m_border, 75);
  56         path.lineTo(200, 75);
  57         path.lineTo(200+m_border, 40);
  58         path.lineTo(200+m_border, m_border + curve);
  59         path.cubicTo(QPointF(200+m_border, m_border), QPointF(200+m_border, m_border), QPointF(200+m_border+curve, m_border));
  60         path.lineTo(w-m_border-curve, m_border);
  61         path.cubicTo(QPointF(w-m_border, m_border), QPointF(w-m_border, m_border), QPointF(w-m_border, m_border+curve));
  62         path.lineTo(w-m_border, h-m_border-curve);
  63         path.cubicTo(QPointF(w-m_border,h-m_border), QPointF(w-m_border,h-m_border), QPointF(w-m_border-curve,h-m_border));
  64         path.lineTo(200+m_border+curve,h-m_border);
  65         path.cubicTo(QPointF(200+m_border,h-m_border),QPointF(200+m_border,h-m_border),QPointF(200+m_border,h-m_border-curve));
  66         path.closeSubpath();
  67         p.drawPath(path);
  68
  69         p.translate(240,40);
  70         m_t->drawContents(&p);
  71     }
  72
  73     painter->save();
  74     QRectF exposed = option->exposedRect.adjusted(-1,-1,1,1);
  75     exposed &= QRectF(0,0, m_cachedPixmap.width(), m_cachedPixmap.height());
  76     painter->drawPixmap(exposed, m_cachedPixmap, exposed);
  77     painter->restore();
  78
  79 }