int pixelsPerLine,
int winSize,
int virtSize,
+ int *pos,
int *lines,
int *linesPerPage)
{
- // GtkRange won't allow upper == lower, so for disabled state use [0,1]
- // with a page size of 1. This will also clamp position to 0.
- int upper = 1;
- int page_size = 1;
+ int upper;
+ int page_size;
if (pixelsPerLine > 0 && winSize > 0 && winSize < virtSize)
{
upper = (virtSize + pixelsPerLine - 1) / pixelsPerLine;
page_size = winSize / pixelsPerLine;
+ *lines = upper;
+ *linesPerPage = page_size;
+ }
+ else
+ {
+ // GtkRange won't allow upper == lower, so for disabled state use [0,1]
+ // with a page size of 1. This will also clamp position to 0.
+ upper = 1;
+ page_size = 1;
+ *lines = 0;
+ *linesPerPage = 0;
}
-
- *lines = upper;
- *linesPerPage = page_size;
GtkAdjustment* adj = range->adjustment;
adj->step_increment = 1;
adj->page_increment =
adj->page_size = page_size;
gtk_range_set_range(range, 0, upper);
+
+ // ensure that the scroll position is always in valid range
+ if (*pos > *lines)
+ *pos = *lines;
}
void wxScrollHelperNative::AdjustScrollbars()
{
- int w, h;
int vw, vh;
+ m_targetWindow->GetVirtualSize(&vw, &vh);
- m_targetWindow->m_hasScrolling = m_xScrollPixelsPerLine != 0 || m_yScrollPixelsPerLine != 0;
+ int w, h;
+ const wxSize availSize = GetSizeAvailableForScrollTarget(
+ m_win->GetSize() - m_win->GetWindowBorderSize());
+ if ( availSize.x >= vw && availSize.y >= vh )
+ {
+ w = availSize.x;
+ h = availSize.y;
+
+ // we know that the scrollbars will be removed
+ DoAdjustHScrollbar(w, vw);
+ DoAdjustVScrollbar(h, vh);
- m_targetWindow->GetVirtualSize( &vw, &vh );
+ return;
+ }
m_targetWindow->GetClientSize(&w, NULL);
- DoAdjustScrollbar(
- m_win->m_scrollBar[wxWindow::ScrollDir_Horz], m_xScrollPixelsPerLine,
- w, vw, &m_xScrollLines, &m_xScrollLinesPerPage);
+ DoAdjustHScrollbar(w, vw);
+
m_targetWindow->GetClientSize(NULL, &h);
- DoAdjustScrollbar(
- m_win->m_scrollBar[wxWindow::ScrollDir_Vert], m_yScrollPixelsPerLine,
- h, vh, &m_yScrollLines, &m_yScrollLinesPerPage);
+ DoAdjustVScrollbar(h, vh);
const int w_old = w;
m_targetWindow->GetClientSize(&w, NULL);
- if (w != w_old)
+ if ( w != w_old )
{
// It is necessary to repeat the calculations in this case to avoid an
// observed infinite series of size events, involving alternating
// AdjustScrollbars() to be called again. If the scrollbar visibility
// is not correct before then, yet another resize will occur, possibly
// leading to an unending series if the sizes are just right.
- DoAdjustScrollbar(
- m_win->m_scrollBar[wxWindow::ScrollDir_Horz], m_xScrollPixelsPerLine,
- w, vw, &m_xScrollLines, &m_xScrollLinesPerPage);
+ DoAdjustHScrollbar(w, vw);
+
m_targetWindow->GetClientSize(NULL, &h);
- DoAdjustScrollbar(
- m_win->m_scrollBar[wxWindow::ScrollDir_Vert], m_yScrollPixelsPerLine,
- h, vh, &m_yScrollLines, &m_yScrollLinesPerPage);
+ DoAdjustVScrollbar(h, vh);
}
}