void Graph::
mouseMoveEvent(QMouseEvent* event)
{
if(dragging||scaling||operationCode){
int newx=event->x(),newy=event->y();
//std::cerr<<"new "<<newx<<" "<<newy<<std::endl;
float newx0,newy0,oldx0,oldy0,dx,dy;
xforminv(newx,newy,newx0,newy0);
xforminv(lastcx,lastcy,oldx0,oldy0);
dx=newx0-oldx0;dy=newy0-oldy0;
if(dragging){
//std::cerr<<"dx "<<dx<<" "<<dy<<std::endl;
xmin-=dx;xmax-=dx;
ymin-=dy;ymax-=dy;
}else if(scaling){
float width=(xmax-xmin)/2.,height=(ymax-ymin)/2.;
float xcenter=(xmax+xmin)/2.,ycenter=(ymax+ymin)/2.;
width*=pow(10.,-dx/(xmax-xmin));
height*=pow(10.,-dy/(ymax-ymin));
xmin=xcenter-width;
ymin=ycenter-height;
xmax=xcenter+width;
ymax=ycenter+height;
}else if(operationCode){
boundEnd=newx0;
}
lastcx=newx;lastcy=newy;
repaint();
}
}
void Graph::mousePressEvent(QMouseEvent* event) {
lastcx = event->x();
lastcy = event->y();
if (event->button() == Qt::MidButton)
dragging = true;
else if (event->button() == Qt::RightButton) {
scaling = true;
}
if (operationCode && Qt::LeftButton) {
float x, y;
xforminv(lastcx, lastcy, x, y);
boundStart = x;
}
}
void Graph::
mouseReleaseEvent(QMouseEvent* event)
{dragging=false;scaling=false;
if(operationCode){
float x,y;
xforminv(event->x(),event->y(),x,y);
switch(operationCode){
case NONE:
break;
case FIND_ROOT:
solveRoot(functionIndex,x);
break;
case FIND_MIN:
solveMin(functionIndex,boundStart,x);
break;
case FIND_MAX:
solveMax(functionIndex,boundStart,x);
break;
}
status->showMessage("");
operationCode=NONE;
}
}
