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Optimized the redrawing of selected rows in doselect().

This commit is contained in:
Pietro Gagliardi 2014-12-14 10:22:15 -05:00
parent ad12b8b1af
commit cb7404cf8b
1 changed files with 27 additions and 2 deletions
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29
wintable/new/select.h
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@ -3,11 +3,36 @@
// damn winsock
static void doselect(struct table *t, intptr_t row, intptr_t column)
{
RECT r, client;
intptr_t oldrow;
LONG height;
oldrow = t->selectedRow;
t->selectedRow = row;
t->selectedColumn = column;
// TODO scroll to ensure the full cell is visible
// TODO redraw only the old and new columns /if there was no scrolling/
InvalidateRect(t->hwnd, NULL, TRUE);
// now redraw the old and new /rows/
if (GetClientRect(t->hwnd, &client) == 0)
panic("error getting Table client rect in doselect()");
client.top += t->headerHeight;
height = rowht(t);
r.left = client.left;
r.right = client.right;
if (oldrow != -1 && oldrow >= t->vscrollpos) {
r.top = client.top + ((oldrow - t->vscrollpos) * height);
r.bottom = r.top + height;
if (InvalidateRect(t->hwnd, &r, TRUE) == 0)
panic("error queueing previously selected row for redraw in doselect()");
}
// t->selectedRow must be visible by this point; we scrolled to it
if (t->selectedRow != -1 && t->selectedRow != oldrow) {
r.top = client.top + ((t->selectedRow - t->vscrollpos) * height);
r.bottom = r.top + height;
if (InvalidateRect(t->hwnd, &r, TRUE) == 0)
panic("error queueing newly selected row for redraw in doselect()");
}
}
// TODO which WM_xBUTTONDOWNs?