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(Herbert): add a new method, inBP, to LyXLength.

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3974 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Angus Leeming 2002-04-11 18:36:18 +00:00
parent b95a56f37a
commit 09f334338a
3 changed files with 35 additions and 0 deletions
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5
src/ChangeLog
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@ -1,3 +1,8 @@
2002-03-28 Herbert Voss <voss@lyx.org>
* lyxlength.[Ch]: add inBP() to get the right PS-point
units (BigPoint). With inPixels we have rounding errors
2002-04-11 Juergen Vigna <jug@sad.it>
* text2.C (setCursorFromCoordinates): set iy to the right value.

28
src/lyxlength.C
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@ -238,6 +238,34 @@ int LyXLength::inPixels(int default_width, int default_height) const
}
int LyXLength::inBP() const
{
// return any LyXLength value as a one with
// the PostScript point, called bp (big points)
double result = 0.0;
int val_sign = val_ < 0.0 ? -1 : 1;
switch (unit_) {
case LyXLength::CM:
// 1bp = 0.2835cm
result = val_ * 28.346;
break;
case LyXLength::MM:
// 1bp = 0.02835mm
result = val_ * 2.8346;
break;
case LyXLength::IN:
// 1pt = 1/72in
result = val_ * 72.0;
break;
default:
// no other than bp possible
result = val_;
break;
}
return static_cast<int>(result * val_sign + 0.5);
}
bool operator==(LyXLength const & l1, LyXLength const & l2)
{
return l1.value() == l2.value() && l1.unit() == l2.unit();

2
src/lyxlength.h
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@ -67,6 +67,8 @@ public:
string const asLatexString() const;
/// return the on-screen size of this length
int inPixels(int default_width, int default_height) const;
/// return the on-screen size of this length of an image
int inBP() const;
/** If "data" is valid, the length represented by it is
stored into "result", if that is not 0. */