1 files changed, 44 insertions, 0 deletions
diff --git a/wintable/new/hscroll.h b/wintable/new/hscroll.h
new file mode 100644
index 0000000..061cd7b
--- /dev/null
+++ b/wintable/new/hscroll.h
@@ -0,0 +1,44 @@
+// 9 december 2014
+
+static void hscrollto(struct table *t, intptr_t pos)
+{
+	// TODO
+}
+
+static void hscrollby(struct table *t, intptr_t delta)
+{
+	// TODO
+}
+
+static void hscroll(struct table *t, WPARAM wParam, LPARAM lParam)
+{
+	// TODO
+}
+
+static void recomputeHScroll(struct table *t)
+{
+	SCROLLINFO si;
+	HDITEMW item;
+	intptr_t i, width;
+	RECT r;
+
+	width = 0;
+	// TODO count dividers?
+	for (i = 0; i < t->nColumns; i++) {
+		ZeroMemory(&item, sizeof (HDITEMW));
+		item.mask = HDI_WIDTH;
+		if (SendMessageW(t->header, HDM_GETITEM, (WPARAM) i, (LPARAM) (&item)) == FALSE)
+			panic("error getting Table column width for recomputeHScroll()");
+		width += item.cxy;
+	}
+	if (GetClientRect(t->hwnd, &r) == 0)
+		panic("error getting Table client rect for recomputeHScroll()");
+	ZeroMemory(&si, sizeof (SCROLLINFO));
+	si.cbSize = sizeof (SCROLLINFO);
+	si.fMask = SIF_PAGE | SIF_RANGE;
+	si.nPage = r.right - r.left;
+	si.nMin = 0;
+	si.nMax = width - 1;		// endpoint inclusive
+	SetScrollInfo(t->hwnd, SB_HORZ, &si, TRUE);
+	// TODO what happens if the above call renders the current scroll position moot?
+}