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// 8 december 2014
struct drawCellParams {
intptr_t row;
intptr_t column;
LONG x;
LONG y;
LONG width; // of column
LONG height; // rowHeight()
LRESULT xoff; // result of HDM_GETBITMAPMARGIN
};
static void drawCell(struct table *t, HDC dc, struct drawCellParams *p)
{
RECT r;
WCHAR msg[200];
int n;
r.left = p->x + p->xoff;
r.right = p->x + p->width;
r.top = p->y;
r.bottom = p->y + p->height;
// TODO fill this rect with the appropriate background color
// TODO then vertical center content
n = wsprintf(msg, L"(%d,%d)", p->row, p->column);
if (DrawTextExW(dc, msg, n, &r, DT_END_ELLIPSIS | DT_LEFT | DT_NOPREFIX | DT_SINGLELINE, NULL) == 0)
panic("error drawing Table cell text");
}
static void draw(struct table *t, HDC dc, RECT cliprect, RECT client)
{
LRESULT i, n;
RECT r;
int x = 0;
HFONT prevfont, newfont;
struct drawCellParams p;
n = SendMessageW(t->header, HDM_GETITEMCOUNT, 0, 0);
for (i = 0; i < n; i++) {
SendMessage(t->header, HDM_GETITEMRECT, (WPARAM) i, (LPARAM) (&r));
r.top = client.top;
r.bottom = client.bottom;
FillRect(dc, &r, GetSysColorBrush(x));
x++;
}
prevfont = selectFont(t, dc, &newfont);
ZeroMemory(&p, sizeof (struct drawCellParams));
p.row = 0;
p.column = 0;
p.x = r.left;
p.y = 100;
p.width = r.right - r.left;
p.height = rowHeight(t, dc, FALSE);
p.xoff = SendMessageW(t->header, HDM_GETBITMAPMARGIN, 0, 0);
drawCell(t, dc, &p);
deselectFont(dc, prevfont, newfont);
}
HANDLER(drawHandlers)
{
HDC dc;
PAINTSTRUCT ps;
RECT client;
RECT r;
if (uMsg != WM_PAINT && uMsg != WM_PRINTCLIENT)
return FALSE;
if (GetClientRect(t->hwnd, &client) == 0)
panic("error getting client rect for Table painting");
if (uMsg == WM_PAINT) {
dc = BeginPaint(t->hwnd, &ps);
if (dc == NULL)
panic("error beginning Table painting");
r = ps.rcPaint;
} else {
dc = (HDC) wParam;
r = client;
}
draw(t, dc, r, client);
if (uMsg == WM_PAINT)
EndPaint(t->hwnd, &ps);
// this is correct for WM_PRINTCLIENT; see http://stackoverflow.com/a/27362258/3408572
*lResult = 0;
return TRUE;
}
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