using namespace boost;
using namespace std;
+const double SigView::MaxScale = 1e9;
+const double SigView::MinScale = 1e-15;
+
const int SigView::SignalHeight = 50;
const int SigView::LabelMarginWidth = 70;
const int SigView::RulerHeight = 30;
_scale(1e-6),
_offset(0)
{
- connect(&_session, SIGNAL(dataUpdated()),
- this, SLOT(dataUpdated()));
+ connect(&_session, SIGNAL(data_updated()),
+ this, SLOT(data_updated()));
setMouseTracking(true);
setAutoFillBackground(false);
}
+void SigView::zoom(double steps)
+{
+ zoom(steps, (width() - LabelMarginWidth) / 2);
+}
+
void SigView::initializeGL()
{
}
void SigView::resizeGL(int width, int height)
{
- setupViewport(width, height);
+ setup_viewport(width, height);
}
void SigView::paintEvent(QPaintEvent *event)
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
- setupViewport(width(), height());
+ setup_viewport(width(), height());
qglClearColor(Qt::white);
glClear(GL_COLOR_BUFFER_BIT);
// Plot the signal
+ glEnable(GL_SCISSOR_TEST);
+ glScissor(LabelMarginWidth, 0, width(), height());
offset = RulerHeight;
BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
{
offset += SignalHeight;
}
+ glDisable(GL_SCISSOR_TEST);
+
// Prepare for QPainter rendering
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
// Paint the ruler
- paintRuler(painter);
+ paint_ruler(painter);
painter.end();
}
-void SigView::dataUpdated()
+void SigView::data_updated()
{
update();
}
-void SigView::mouseMoveEvent(QMouseEvent *event)
-{
- assert(event);
-}
-
void SigView::mousePressEvent(QMouseEvent *event)
{
assert(event);
+
+ _mouse_down_point = event->pos();
+ _mouse_down_offset = _offset;
}
-void SigView::mouseReleaseEvent(QMouseEvent *event)
+void SigView::mouseMoveEvent(QMouseEvent *event)
{
assert(event);
- const double cursor_offset = _offset + _scale * (double)event->x();
-
- switch(event->button())
+ if(event->buttons() & Qt::LeftButton)
{
- case Qt::LeftButton:
- _scale *= 2.0 / 3.0;
- break;
-
- case Qt::RightButton:
- _scale *= 3.0 / 2.0;
- break;
+ _offset = _mouse_down_offset + (_mouse_down_point - event->pos()).x() * _scale;
+ update();
}
+}
- _offset = cursor_offset - _scale * (double)event->x();
+void SigView::mouseReleaseEvent(QMouseEvent *event)
+{
+ assert(event);
+}
- update();
+void SigView::wheelEvent(QWheelEvent *event)
+{
+ assert(event);
+ zoom(event->delta() / 120, event->x() - LabelMarginWidth);
}
-void SigView::setupViewport(int width, int height)
+void SigView::setup_viewport(int width, int height)
{
glViewport(0, 0, (GLint)width, (GLint)height);
glMatrixMode(GL_PROJECTION);
glMatrixMode(GL_MODELVIEW);
}
-void SigView::paintRuler(QPainter &p)
+void SigView::paint_ruler(QPainter &p)
{
const double MinSpacing = 80;
division++;
}
}
+
+void SigView::zoom(double steps, int offset)
+{
+ const double cursor_offset = _offset + _scale * offset;
+ _scale *= pow(3.0/2.0, -steps);
+ _scale = max(min(_scale, MaxScale), MinScale);
+ _offset = cursor_offset - _scale * offset;
+ update();
+}