lyx_mirror/src/mathed/math_rootinset.C
André Pönitz 9ccefe810b mathed108.diff
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2352 a592a061-630c-0410-9148-cb99ea01b6c8
2001-07-26 06:46:50 +00:00

99 lines
2.0 KiB
C

/*
* File: math_root.C
* Purpose: Implementation of the root object
* Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
* Created: January 1999
* Description: Root math object
*
* Copyright: 1999 Alejandro Aguilar Sierra
*
* You are free to use and modify this code under the terms of
* the GNU General Public Licence version 2 or later.
*/
#ifdef __GNUG__
#pragma implementation
#endif
#include "math_rootinset.h"
#include "support/LOstream.h"
#include "Painter.h"
MathRootInset::MathRootInset()
: MathInset(2)
{}
MathInset * MathRootInset::clone() const
{
return new MathRootInset(*this);
}
void MathRootInset::Metrics(MathStyles st)
{
MathInset::Metrics(st);
size_ = st;
ascent_ = std::max(xcell(0).ascent() + 5, xcell(1).ascent()) + 2;
descent_ = std::max(xcell(1).descent() + 5, xcell(0).descent()) + 2;
width_ = xcell(0).width() + xcell(1).width() + 10;
}
void MathRootInset::draw(Painter & pain, int x, int y)
{
xo(x);
yo(y);
int const w = xcell(0).width();
xcell(0).draw(pain, x, y - 5 - xcell(0).descent()); // the "exponent"
xcell(1).draw(pain, x + w + 8, y); // the "base"
int const a = ascent();
int const d = descent();
int xp[5];
int yp[5];
xp[0] = x + width_; yp[0] = y - a + 1;
xp[1] = x + w + 4; yp[1] = y - a + 1;
xp[2] = x + w; yp[2] = y + d;
xp[3] = x + w - 2; yp[3] = y + (d - a)/2 + 2;
xp[4] = x; yp[4] = y + (d - a)/2 + 2;
pain.lines(xp, yp, 5, LColor::mathline);
}
void MathRootInset::Write(std::ostream & os, bool fragile) const
{
os << "\\sqrt[";
cell(0).Write(os, fragile);
os << "]{";
cell(1).Write(os, fragile);
os << '}';
}
void MathRootInset::WriteNormal(std::ostream & os) const
{
os << "[root ";
cell(1).WriteNormal(os);
os << " ";
cell(0).WriteNormal(os);
os << "] ";
}
bool MathRootInset::idxUp(int & idx, int & pos) const
{
if (idx == 0)
return false;
idx = 0;
pos = 0;
return true;
}
bool MathRootInset::idxDown(int & idx, int & pos) const
{
if (idx == 1)
return false;
idx = 1;
pos = 0;
return true;
}