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Optimized new Windows Table selection redraw and did most of the work for scroliing on selection change. Also more TODOs.

This commit is contained in:
Pietro Gagliardi 2014-11-18 08:17:42 -05:00
parent 46056e54e4
commit 0e13193310
1 changed files with 17 additions and 3 deletions
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20
wintable/main.c
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@ -44,6 +44,7 @@ enum {
// - space to toggle (TODO); + or = to set; - to clear (see http://msdn.microsoft.com/en-us/library/windows/desktop/bb775941%28v=vs.85%29.aspx)
// - TODO figure out which notification is needed
// - http://blogs.msdn.com/b/oldnewthing/archive/2006/01/03/508694.aspx
// - merge recomputeHScroll() with resize()? the pagesize can change if a horizontal scrollbar is added or removed
#define tableWindowClass L"gouitable"
@ -148,6 +149,8 @@ static void repositionHeader(struct table *t)
t->headerHeight = headerpos.cy;
}
// this counts partially visible rows
// for all fully visible rows use t->pagesize
// cliprect and rowHeight must be specified here to avoid recomputing things multiple times
static intptr_t lastVisible(struct table *t, RECT cliprect, LONG rowHeight)
{
@ -339,9 +342,20 @@ static void finishSelect(struct table *t, intptr_t prev)
t->selected = 0;
if (t->selected >= t->count)
t->selected = t->count - 1;
// TODO update only the old and new selected items
redrawAll(t);
// TODO scroll to the selected item if it's not entirely visible
// if we need to scroll, the scrolling will force a redraw, so we don't have to worry about doing so ourselves
if (t->selected < t->firstVisible)
;//TODO vscrollto(t, t->selected);
// note that this is not lastVisible(t) because the last visible row may only be partially visible and we want selections to make them fully visible
// TODO >=?
else if (t->selected > (t->firstVisible + t->pagesize))
;//TODO vscrollto(t, t->selected - t->pagesize);
else {
// no scrolling needed; redraw just the old and new rows
// if prev == t->selected, redraw that row at least once because the focused column may have changed
redrawRow(t, prev);
if (prev != t->selected)
redrawRow(t, t->selected);
}
}
static void keySelect(struct table *t, WPARAM wParam, LPARAM lParam)