shareboardcanvas.cpp

   1 #include "shareboardcanvas.h"
   2 #include <QMouseEvent>
   3 #include <QPaintEvent>
   4 #include <QPainter>
   5 #include <QPixmap>
   6 #include <QPen>
   7 #include <QColor>
   8 #include <QDebug>
   9 #include "shareboard.h"
  10
  11 ShareboardCanvas::ShareboardCanvas(QWidget* parent) : QWidget(parent) {
  12         setMinimumSize(640,480);
  13         setMouseTracking(true);
  14         mouseDown = false;
  15 }
  16
  17 ShareboardCanvas::~ShareboardCanvas() {
  18 }
  19
  20 void ShareboardCanvas::setModel(Shareboard* b) {
  21         board = b;
  22 }
  23
  24 void ShareboardCanvas::mouseMoveEvent(QMouseEvent* event) {
  25         // Send mouse move event to network thread
  26         emit mouseMovedTo(event->posF());
  27         lastPos = event->posF();
  28         // If the button is down
  29         if(mouseDown) {
  30                 emit segmentDrawn(dragPath.last(), event->posF());
  31                 dragPath.append(event->posF());
  32         }
  33         // Trigger a repaint
  34         update();
  35 }
  36
  37 void ShareboardCanvas::mousePressEvent(QMouseEvent* event) {
  38         if(event->button() & Qt::LeftButton) {
  39                 if(board->drawState == 0) {
  40                         emit insertImage(event->posF());
  41                         return;
  42                 }
  43                 mouseDown = true;
  44                 dragPath.append(event->posF()); // We're starting a new drag path
  45         }
  46         //
  47 }
  48
  49 void ShareboardCanvas::mouseReleaseEvent(QMouseEvent* event) {
  50         if(event->button() & Qt::LeftButton) {
  51                 mouseDown = false;
  52                 qDebug() << dragPath.size() << "mouse move events counted this drag";
  53                 // Depending on the tool, we now dispatch different types of events
  54                 dragPath.clear(); // Clear the path; we're no longer tracking a drag
  55         }
  56 }
  57
  58 void ShareboardCanvas::paintEvent(QPaintEvent* event) {
  59         Q_UNUSED(event)
  60         QPainter p(this);
  61         // Paint the background from the saved state
  62         p.drawImage(0, 0, board->view());
  63         // Now paint our local changes on top of it (optional, will make things look snappier)
  64
  65         // Now paint the set of mouse cursors on top of that
  66         QMap<int, QPointF>::const_iterator i;
  67         for (i = board->viewCursors.constBegin(); i!=board->viewCursors.constEnd(); ++i) {
  68                 if(i.key() == board->userID) {
  69                         if( board->drawState < 0) {// Eraser mode
  70                                 p.setPen(QColor(Qt::black));
  71                                 p.setBrush(QColor(Qt::white));
  72                                 p.drawEllipse(lastPos, qAbs(board->drawState), qAbs(board->drawState));
  73                                 //p.drawEllipse(i.value(), qAbs(board->drawState), qAbs(board->drawState));
  74                         }
  75                         if( board->drawState == 0) { // Image mode
  76                                 p.drawImage(lastPos, board->insertImage);
  77                         }
  78                         continue;
  79                 }
  80                 QPen pen(QColor(255,0,0,50));
  81                 pen.setCapStyle(Qt::RoundCap);
  82                 p.setPen(pen);
  83                 p.setBrush(QBrush(QColor(255,0,0,50)));
  84                 p.drawEllipse(i.value(),4,4);
  85                 p.setPen(Qt::black);
  86                 p.setBrush(Qt::black);
  87                 p.drawText(i.value(),board->viewUsers[i.key()]);
  88         }
  89 }