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BTextView::_ScrollToOffset() just didn't work correctly most of the

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times, since xdiff and ydiff didn't take the point returned by 
PointAt() into account. Thanks to Andrea Anzani for noticing this.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22977 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini 2007-11-22 10:53:53 +00:00
parent e4ef0f13b7
commit c9dcf7979b
1 changed files with 10 additions and 15 deletions
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25
src/kits/interface/TextView.cpp
View File

@ -1909,6 +1909,7 @@ BTextView::ScrollToOffset(int32 inOffset)
_ScrollToOffset(inOffset, ScrollBar(B_HORIZONTAL) != NULL, ScrollBar(B_VERTICAL) != NULL);
}
void
BTextView::_ScrollToOffset(int32 inOffset, bool useHorz, bool useVert)
{
@ -1917,25 +1918,19 @@ BTextView::_ScrollToOffset(int32 inOffset, bool useHorz, bool useVert)
float xdiff = 0.0;
float ydiff = 0.0;
BPoint point = PointAt(inOffset, &lineHeight);
if (useHorz) {
if (point.x < bounds.left) {
xdiff = -1 * (bounds.IntegerWidth() / 2);
// normalize scroll value to prevent scrolling past left boundary of view
if (bounds.left < fabs(xdiff))
xdiff = -1 * bounds.left;
} else if (point.x >= bounds.right)
xdiff = bounds.IntegerWidth() / 2;
if (point.x < bounds.left)
xdiff = point.x - bounds.left - bounds.IntegerWidth() / 2;
else if (point.x >= bounds.right)
xdiff = point.x - bounds.right + bounds.IntegerWidth() / 2;
}
if (useVert) {
if (point.y < bounds.top) {
ydiff = -1 * (bounds.IntegerHeight() / 2);
// normalize scroll value to prevent scrolling past top of view
if (bounds.top < fabs(ydiff))
ydiff = -1 * bounds.top;
} else if (point.y >= bounds.bottom)
ydiff = bounds.IntegerHeight() / 2;
if (point.y < bounds.top)
ydiff = point.y - bounds.top - bounds.IntegerHeight() / 2;
else if (point.y >= bounds.bottom)
ydiff = point.y - bounds.bottom + bounds.IntegerHeight() / 2;
}
ScrollBy(xdiff, ydiff);