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Reimplemented header scrolling.

This commit is contained in:
Pietro Gagliardi 2014-10-20 22:31:33 -04:00
parent 0437ecd403
commit b4695182de
1 changed files with 9 additions and 4 deletions
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13
wintable/main.c
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@ -137,7 +137,7 @@ static void selectItem(struct table *t, WPARAM wParam, LPARAM lParam)
} }
// TODO on initial show the items are not arranged properly // TODO on initial show the items are not arranged properly
// TODO the lowest row does not redraw properly // TODO the lowest row does not redraw properly after scrolling
static void vscrollto(struct table *t, intptr_t newpos) static void vscrollto(struct table *t, intptr_t newpos)
{ {
SCROLLINFO si; SCROLLINFO si;
@ -152,7 +152,7 @@ static void vscrollto(struct table *t, intptr_t newpos)
// negative because ScrollWindowEx() is "backwards" // negative because ScrollWindowEx() is "backwards"
if (ScrollWindowEx(t->hwnd, 0, (-(newpos - t->firstVisible)) * rowHeight(t), if (ScrollWindowEx(t->hwnd, 0, (-(newpos - t->firstVisible)) * rowHeight(t),
NULL, NULL, NULL, NULL, &scrollArea, &scrollArea, NULL, NULL,
SW_ERASE | SW_INVALIDATE) == ERROR) SW_ERASE | SW_INVALIDATE) == ERROR)
abort(); abort();
t->firstVisible = newpos; t->firstVisible = newpos;
@ -272,7 +272,7 @@ static void drawItems(struct table *t, HDC dc, RECT cliprect)
intptr_t i; intptr_t i;
RECT r; RECT r;
intptr_t first, last; intptr_t first, last;
POINT prevOrigin; POINT prevOrigin, prevViewportOrigin;
// TODO eliminate the need (only use cliprect) // TODO eliminate the need (only use cliprect)
if (GetClientRect(t->hwnd, &r) == 0) if (GetClientRect(t->hwnd, &r) == 0)
@ -285,13 +285,16 @@ static void drawItems(struct table *t, HDC dc, RECT cliprect)
if (GetTextMetricsW(dc, &tm) == 0) if (GetTextMetricsW(dc, &tm) == 0)
abort(); abort();
// adjust the clip rect and the viewport so that (0, 0) is always the first item // adjust the clip rect and the window so that (0, 0) is always the first item
// adjust the viewport so that everything is shifted down t->headerHeight pixels
if (OffsetRect(&cliprect, 0, t->firstVisible * tm.tmHeight) == 0) if (OffsetRect(&cliprect, 0, t->firstVisible * tm.tmHeight) == 0)
abort(); abort();
if (GetWindowOrgEx(dc, &prevOrigin) == 0) if (GetWindowOrgEx(dc, &prevOrigin) == 0)
abort(); abort();
if (SetWindowOrgEx(dc, prevOrigin.x, prevOrigin.y + (t->firstVisible * tm.tmHeight), NULL) == 0) if (SetWindowOrgEx(dc, prevOrigin.x, prevOrigin.y + (t->firstVisible * tm.tmHeight), NULL) == 0)
abort(); abort();
if (SetViewportOrgEx(dc, 0, t->headerHeight, &prevViewportOrigin) == 0)
abort();
// see http://blogs.msdn.com/b/oldnewthing/archive/2003/07/29/54591.aspx and http://blogs.msdn.com/b/oldnewthing/archive/2003/07/30/54600.aspx // see http://blogs.msdn.com/b/oldnewthing/archive/2003/07/29/54591.aspx and http://blogs.msdn.com/b/oldnewthing/archive/2003/07/30/54600.aspx
first = cliprect.top / tm.tmHeight; first = cliprect.top / tm.tmHeight;
@ -334,6 +337,8 @@ static void drawItems(struct table *t, HDC dc, RECT cliprect)
} }
// reset everything // reset everything
if (SetViewportOrgEx(dc, prevViewportOrigin.x, prevViewportOrigin.y, NULL) == 0)
abort();
if (SetWindowOrgEx(dc, prevOrigin.x, prevOrigin.y, NULL) == 0) if (SetWindowOrgEx(dc, prevOrigin.x, prevOrigin.y, NULL) == 0)
abort(); abort();
if (SelectObject(dc, prevfont) != (HGDIOBJ) (thisfont)) if (SelectObject(dc, prevfont) != (HGDIOBJ) (thisfont))