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The segment is constructed by clicking 2 times over the widget. 

Not by draging and drop.
This commit is contained in:
Radu Ursu 2002-03-11 08:58:13 +00:00
parent f7d22356c9
commit b22e27ef54
1 changed files with 72 additions and 56 deletions
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128
Packages/Qt_widget/include/CGAL/IO/Qt_widget_get_segment.h
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@ -39,76 +39,92 @@ public:
typedef Segment_2<R> Segment;
typedef typename R::FT FT;
Qt_widget_get_segment() {};
Qt_widget_get_segment() : firstpoint(false),
firsttime(true){};
private:
void mousePressEvent(QMouseEvent *e)
{
if(e->button() == CGAL_QT_WIDGET_GET_POINT_BUTTON)
if(e->button() == CGAL_QT_WIDGET_GET_POINT_BUTTON && !firstpoint)
{
FT
x=static_cast<FT>(widget->x_real(e->x())),
y=static_cast<FT>(widget->y_real(e->y()));
x1 = x;
y1 = y;
x2 = x;
y2 = y;
firstpoint = TRUE;
FT
x=static_cast<FT>(widget->x_real(e->x())),
y=static_cast<FT>(widget->y_real(e->y()));
x1 = x;
y1 = y;
x2 = x;
y2 = y;
firstpoint = TRUE;
} else if(e->button() == CGAL_QT_WIDGET_GET_POINT_BUTTON){
FT
x=static_cast<FT>(widget->x_real(e->x())),
y=static_cast<FT>(widget->y_real(e->y()));
if(x1!=x || y1!=y) {
widget->new_object(make_object(Segment(Point(x1,y1),Point(x,y))));
firstpoint = FALSE;
}
}
};
}
void leaveEvent(QEvent *e)
{
if(firstpoint)
{
RasterOp old_raster = widget->rasterOp();//save the initial raster mode
QColor old_color = widget->color();
widget->lock();
widget->setRasterOp(XorROP);
*widget << CGAL::GREEN;
*widget << Segment(Point(x1,y1),Point(x2,y2));
widget->setRasterOp(old_raster);
widget->setColor(old_color);
widget->unlock();
firsttime = true;
}
}
void mouseMoveEvent(QMouseEvent *e)
{
if(firstpoint)
{
FT
x=static_cast<FT>(widget->x_real(e->x())),
y=static_cast<FT>(widget->y_real(e->y()));
RasterOp old_raster = widget->rasterOp();//save the initial raster mode
QColor old_color = widget->color();
widget->setRasterOp(XorROP);
widget->lock();
*widget << CGAL::GREEN;
if(!firsttime)
*widget << Segment(Point(x1,y1),Point(x2,y2));
*widget << Segment(Point(x1,y1),Point(x,y));
widget->unlock();
widget->setRasterOp(old_raster);
widget->setColor(old_color);
if(firstpoint==TRUE)
{
FT
x=static_cast<FT>(widget->x_real(e->x())),
y=static_cast<FT>(widget->y_real(e->y()));
RasterOp old = widget->rasterOp(); //save the initial raster mode
widget->setRasterOp(XorROP);
widget->lock();
*widget << CGAL::GREEN;
*widget << Segment(Point(x1,y1),Point(x2,y2));
*widget << Segment(Point(x1,y1),Point(x,y));
widget->unlock();
widget->setRasterOp(old);
//save the last coordinates to redraw the screen
x2 = x;
y2 = y;
//save the last coordinates to redraw the screen
x2 = x;
y2 = y;
firsttime = false;
}
};
void mouseReleaseEvent(QMouseEvent *e)
{
if(e->button() == CGAL_QT_WIDGET_GET_POINT_BUTTON)
{
FT
x=static_cast<FT>(widget->x_real(e->x())),
y=static_cast<FT>(widget->y_real(e->y()));
if(x1!=x || y1!=y)
widget->new_object(make_object(Segment(Point(x1,y1),Point(x,y))));
firstpoint = FALSE;
}
}
void attaching()
{
oldcursor = widget->cursor();
widget->setCursor(crossCursor);
};
void attaching()
{
oldcursor = widget->cursor();
widget->setCursor(crossCursor);
};
void detaching()
{
widget->setCursor(oldcursor);
firstpoint = false;
};
void detaching()
{
widget->setCursor(oldcursor);
//widget->setMouseTracking(FALSE);
};
FT x1, y1;
FT x2, y2;
bool firstpoint;
FT x1, //the X of the first point
y1; //the Y of the first point
FT x2, //the old second point's X
y2; //the old second point's Y
bool firstpoint, //true if the user left clicked once
firsttime; //true if the line is not drawn
};//end class
} // namespace CGAL