protected void UpdateScrollBars() {
int old_max, old_page_size;
if (HaveVerticalScrollbar) {
if (ScrollbarsVisible) FVerticalScrollbar.Show();
else FVerticalScrollbar.Hide();
if (VScrollBarIsRight)
FVerticalScrollbar.SetX(ClientRect.x + ClientRect.w - FVerticalScrollbar.Width());
else FVerticalScrollbar.SetX(ClientRect.x);
FVerticalScrollbar.SetY(ClientRect.y);
old_max = FVerticalScrollbar.Max;
old_page_size = FVerticalScrollbar.PageSize;
FVerticalScrollbar.Min = 0;
FVerticalScrollbar.Max = FullHeight;
if (HaveHorizontalScrollbar) {
FVerticalScrollbar.SetHeight(ClientRect.h - FHorizontalScrollbar.Height());
} else {
FVerticalScrollbar.SetHeight(ClientRect.h);
}
FVerticalScrollbar.PageSize = FVerticalScrollbar.Height();
if (AutoScrollV)
if (FVerticalScrollbar.Pos + old_page_size >= old_max)
FVerticalScrollbar.SetPos(FVerticalScrollbar.Max - FVerticalScrollbar.PageSize);
}
if (HaveHorizontalScrollbar) {
if (ScrollbarsVisible) FHorizontalScrollbar.Show();
else FHorizontalScrollbar.Hide();
FHorizontalScrollbar.SetX(ClientRect.x);
if (HScrollBarIsBottom)
FHorizontalScrollbar.SetY(ClientRect.y + ClientRect.h - FHorizontalScrollbar.Height());
else FHorizontalScrollbar.SetY(ClientRect.y);
old_max = FHorizontalScrollbar.Max;
old_page_size = FHorizontalScrollbar.PageSize;
FHorizontalScrollbar.Min = 0;
FHorizontalScrollbar.Max = FullWidth;
if (HaveVerticalScrollbar) {
FHorizontalScrollbar.SetWidth(ClientRect.w - FVerticalScrollbar.Width());
} else {
FHorizontalScrollbar.SetWidth(ClientRect.w);
}
FHorizontalScrollbar.PageSize = FHorizontalScrollbar.Width();
if (AutoScrollH)
if (FHorizontalScrollbar.Pos + old_page_size >= old_max)
FHorizontalScrollbar.SetPos(FHorizontalScrollbar.Max - FHorizontalScrollbar.PageSize);
}
}
public void SetStyle(boolean v, boolean h) {
boolean changed = false;
// { +VERT}
if (v && !HaveVerticalScrollbar) {
if (FVerticalScrollbar != null) FVerticalScrollbar.Unlink();
FVerticalScrollbar = CreateScrollbar(true);
FVerticalScrollbar.SetVertical(true);
FVerticalScrollbar.Min = 1;
FVerticalScrollbar.Pos = 1;
changed = true;
}
// { -VERT}
if (!v && HaveVerticalScrollbar) {
if (FVerticalScrollbar != null) {
FVerticalScrollbar.Unlink();
FVerticalScrollbar = null;
}
changed = true;
}
// { +HORIZ}
if (h && !HaveHorizontalScrollbar) {
if (FHorizontalScrollbar != null) FHorizontalScrollbar.Unlink();
FHorizontalScrollbar = CreateScrollbar(false);
FHorizontalScrollbar.SetVertical(true);
FHorizontalScrollbar.Min = 1;
FHorizontalScrollbar.Pos = 1;
changed = true;
}
// { -HORIZ}
if (!h && HaveHorizontalScrollbar) {
if (FHorizontalScrollbar != null) {
FHorizontalScrollbar.Unlink();
FHorizontalScrollbar = null;
}
changed = true;
}
if (changed) {
HaveHorizontalScrollbar = h;
HaveVerticalScrollbar = v;
UpdateScrollBars();
}
}
