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8b7b3a5895
- make all cache variables mutable, remove const_casts git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2426 a592a061-630c-0410-9148-cb99ea01b6c8
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
/*
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* File: math_root.C
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* Purpose: Implementation of the root object
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* Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
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* Created: January 1999
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* Description: Root math object
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*
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* Copyright: 1999 Alejandro Aguilar Sierra
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*
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* You are free to use and modify this code under the terms of
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* the GNU General Public Licence version 2 or later.
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*/
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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include "math_rootinset.h"
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#include "support/LOstream.h"
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#include "Painter.h"
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MathRootInset::MathRootInset()
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: MathNestInset(2)
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{}
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MathInset * MathRootInset::clone() const
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{
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return new MathRootInset(*this);
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}
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void MathRootInset::metrics(MathStyles st) const
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{
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MathNestInset::metrics(st);
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size_ = st;
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ascent_ = std::max(xcell(0).ascent() + 5, xcell(1).ascent()) + 2;
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descent_ = std::max(xcell(1).descent() + 5, xcell(0).descent()) + 2;
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width_ = xcell(0).width() + xcell(1).width() + 10;
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}
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void MathRootInset::draw(Painter & pain, int x, int y) const
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{
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xo(x);
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yo(y);
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int const w = xcell(0).width();
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xcell(0).draw(pain, x, y - 5 - xcell(0).descent()); // the "exponent"
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xcell(1).draw(pain, x + w + 8, y); // the "base"
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int const a = ascent();
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int const d = descent();
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int xp[5];
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int yp[5];
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xp[0] = x + width_; yp[0] = y - a + 1;
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xp[1] = x + w + 4; yp[1] = y - a + 1;
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xp[2] = x + w; yp[2] = y + d;
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xp[3] = x + w - 2; yp[3] = y + (d - a)/2 + 2;
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xp[4] = x; yp[4] = y + (d - a)/2 + 2;
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pain.lines(xp, yp, 5, LColor::mathline);
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}
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void MathRootInset::write(std::ostream & os, bool fragile) const
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{
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os << "\\sqrt[";
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cell(0).write(os, fragile);
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os << "]{";
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cell(1).write(os, fragile);
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os << '}';
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}
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void MathRootInset::writeNormal(std::ostream & os) const
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{
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os << "[root ";
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cell(1).writeNormal(os);
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os << " ";
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cell(0).writeNormal(os);
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os << "] ";
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}
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bool MathRootInset::idxUp(int & idx, int & pos) const
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{
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if (idx == 0)
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return false;
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idx = 0;
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pos = 0;
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return true;
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}
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bool MathRootInset::idxDown(int & idx, int & pos) const
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{
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if (idx == 1)
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return false;
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idx = 1;
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pos = 0;
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return true;
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}
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