Hello Jean-Marc,
>
> Le 26/06/2013 08:45, Hashini Senaratne a écrit :
> > Hello Jean-Marc,
> >
> >> * A Cursor is a descendant of CursorData that contains interesting
> >> display-related information, in particular targetX(), the horizontal
> >> position of the cursor in pixels.
> >
> > I checked targetX() and it only gets changed when the cursor is moving along
> > a Math equation.
> > To mention more precisely, when I am typing normal text, targertX() value
> > changes, when I typing in a Math inset targetX() do not change. But when I
> > go along a already typed text targetX() do not change and when I go along a
> > already inserted Math targetX() changes accordingly.
> > Why is that?
> > Is not targetX() valid for any Row?
> > Is there any other attribute that can be used to absolute pixel value where
> > the cursor lies in.
>
> You can use setTargetX() to force a recomputation. Does this work?
>
Sorry that did not work.
I am using this within drawparagraph() of TextMetrics. As setTargetX() is
not a const method, I cannot call it as cur.setTargetX(). So I defined
another non- cnstant cursor called 'cr'.and setTargetX().
Before I call the setTagetX I tried printing x_target() (which will return
targetX or -1 if unset). Here I got -1 when I am in the Math and the value
same as targetX() when I am within the text. (Actually what I hoped to get
is a result which is totally upside down) But as I mentioned, that value did
not change when I go right or left in that same text row.
Then I called cr.setTargetX() and againg tried printing x_target() values.
There I did not get any -1 for any case. The value I got was exactly like
the value from targetX(). But here also nothing changed when moving to and
fro in a text row.
So the problem did not solve. Am I doing anything wrong?
And as I figured out, the comment for int targetX() const; in Cursor.h file
is wrong. It says "in pixels from left of screen, set to current position if
unset", but it really does not set to current position if unset.
void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int
y) const
{
//...
Cursor const & cur = bv_->cursor();
Cursor & cr = bv_->cursor();
//...
for (size_t i = 0; i != nrows; ++i) {
Row const & row = pm.rows()[i];
if (i)
y += row.ascent();
bool const inside = (y + row.descent() >= 0
&& y - row.ascent() < ww);
// It is not needed to draw on screen if we are not inside.
pi.pain.setDrawingEnabled(inside && original_drawing_state);
// horizontal sliding for too long insects
int inc_x=x;
//current x position of the cursor in pixels
int cur_x=cur.targetX();
BufferView & bv = cur.bv();
int const maxwidth = bv.workWidth();
if (cur_x >= maxwidth)
inc_x-=(cur_x-maxwidth)+10;
//test
cr.setTargetX();
cout << "targetX(): " << cur.targetX() << " " << cur.x_target()
<< endl;
RowPainter rp(pi, *text_, pit, row, bidi, inc_x, y);
