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Properly moved the new Windows Table header during hscroll.

This commit is contained in:
Pietro Gagliardi 2014-11-08 22:46:31 -05:00
parent 9ab145256e
commit 0c31f15058
1 changed files with 27 additions and 12 deletions
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39
wintable/main.c
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@ -94,18 +94,40 @@ static RECT realClientRect(struct table *t)
return r;
}
static void repositionHeader(struct table *t)
{
RECT r;
HDLAYOUT headerlayout;
WINDOWPOS headerpos;
if (GetClientRect(t->hwnd, &r) == 0) // use the whole client rect
abort();
// grow the rectangle to the left to fake scrolling
r.left -= t->hpos;
headerlayout.prc = &r;
headerlayout.pwpos = &headerpos;
if (SendMessageW(t->header, HDM_LAYOUT, 0, (LPARAM) (&headerlayout)) == FALSE)
abort();
if (SetWindowPos(t->header, headerpos.hwndInsertAfter, headerpos.x, headerpos.y, headerpos.cx, headerpos.cy, headerpos.flags | SWP_SHOWWINDOW) == 0)
abort();
t->headerHeight = headerpos.cy;
}
static void hscrollto(struct table *t, intptr_t newpos)
{
SCROLLINFO si;
RECT scrollArea;
if (newpos < 0)
newpos = 0;
if (newpos > (t->width - t->hpagesize))
newpos = (t->width - t->hpagesize);
scrollArea = realClientRect(t);
// negative because ScrollWindowEx() is "backwards"
if (ScrollWindowEx(t->hwnd, -(newpos - t->hpos), 0,
NULL, NULL, NULL, NULL,
&scrollArea, &scrollArea, NULL, NULL,
SW_ERASE | SW_INVALIDATE) == ERROR)
abort();
t->hpos = newpos;
@ -120,6 +142,9 @@ static void hscrollto(struct table *t, intptr_t newpos)
si.nMax = t->width - 1; // nMax is inclusive
si.nPos = t->hpos;
SetScrollInfo(t->hwnd, SB_HORZ, &si, TRUE);
// and finally reposition the header
repositionHeader(t);
}
static void hscrollby(struct table *t, intptr_t n)
@ -360,19 +385,9 @@ static void resize(struct table *t)
{
RECT r;
SCROLLINFO si;
HDLAYOUT headerlayout;
WINDOWPOS headerpos;
// do this first so our scrollbar calculations can be correct
if (GetClientRect(t->hwnd, &r) == 0) // use the whole client rect
abort();
headerlayout.prc = &r;
headerlayout.pwpos = &headerpos;
if (SendMessageW(t->header, HDM_LAYOUT, 0, (LPARAM) (&headerlayout)) == FALSE)
abort();
if (SetWindowPos(t->header, headerpos.hwndInsertAfter, headerpos.x, headerpos.y, headerpos.cx, headerpos.cy, headerpos.flags | SWP_SHOWWINDOW) == 0)
abort();
t->headerHeight = headerpos.cy;
repositionHeader(t);
// now adjust the scrollbars
r = realClientRect(t);