mainwindow.cpp

   1 #include "mainwindow.h"
   2 #include "element.h"
   3 #include <math.h>
   4 #include <KDebug>
   5 #include <QMouseEvent>
   6 #include <QResizeEvent>
   7
   8 MainWindow::MainWindow(QWidget* parent)
   9 : CANVAS(parent) {
  10 #ifndef USE_KGC
  11   m_scene = new QGraphicsScene(this);
  12   setScene(m_scene);
  13
  14   setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  15   setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  16
  17   setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
  18   setOptimizationFlags(
  19     QGraphicsView::DontClipPainter |
  20     QGraphicsView::DontSavePainterState);
  21 #endif
  22
  23   connect(&m_timer, SIGNAL(timeout()), this, SLOT(tick()));
  24
  25   m_time.start();
  26   m_last_time = 0;
  27   m_timer.start(20);
  28
  29   m_size = QSize(600, 600);
  30 }
  31
  32 void MainWindow::resizeEvent(QResizeEvent*) {
  33 #ifndef USE_KGC
  34   m_scene->setSceneRect(rect());
  35 #endif
  36 }
  37
  38 void MainWindow::addElement(const QPoint& p) {
  39   SCENE* scene =
  40 #ifdef USE_KGC
  41     this;
  42 #else
  43     m_scene;
  44 #endif
  45   Element* element = new Element(scene, p);
  46   m_elements.push_back(element);
  47
  48   kDebug() << m_elements.size() << endl;
  49 }
  50
  51 void MainWindow::tick() {
  52   int elapsed = m_time.elapsed();
  53   int delta = elapsed - m_last_time;
  54   m_last_time = elapsed;
  55
  56   foreach (Element* item, m_elements) {
  57     QPointF new_pos = item->position() + item->velocity() * delta;
  58     QPointF new_vel = item->velocity();
  59
  60     if (new_pos.x() <= item->size().x() / 2) {
  61       new_pos.setX(item->size().x() - new_pos.x());
  62       new_vel.setX(fabs(new_vel.x()));
  63     }
  64     if (new_pos.x() >= m_size.width() - item->size().x() / 2) {
  65       new_pos.setX(2 * m_size.width() - item->size().x() - new_pos.x());
  66       new_vel.setX(-fabs(new_vel.x()));
  67     }
  68     if (new_pos.y() <= item->size().y() / 2) {
  69       new_pos.setY(item->size().y() - new_pos.y());
  70       new_vel.setY(fabs(new_vel.y()));
  71     }
  72     if (new_pos.y() >= m_size.height() - item->size().y() / 2) {
  73       new_pos.setY(2 * m_size.height() - item->size().y() - new_pos.y());
  74       new_vel.setY(-fabs(new_vel.y()));
  75     }
  76
  77     item->setPosition(new_pos);
  78     item->setVelocity(new_vel);
  79   }
  80 }
  81
  82 void MainWindow::mousePressEvent(QMouseEvent* e) {
  83   addElement(e->pos());
  84 }
  85