From 6efc67d7e2163fd19deed4d3d3db37704a367bc4 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Sun, 7 Dec 2014 20:16:58 -0500
Subject: [PATCH] More header control stuff: resize handling/header control
 repositioning.

---
 wintable/new/header.h | 17 ++++++++++++++++-
 wintable/new/main.c   |  2 ++
 wintable/new/resize.h | 17 +++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 wintable/new/resize.h

diff --git a/wintable/new/header.h b/wintable/new/header.h
index 213516a..374aaa4 100644
--- a/wintable/new/header.h
+++ b/wintable/new/header.h
@@ -4,6 +4,7 @@ static void makeHeader(struct table *t, HINSTANCE hInstance)
 {
 	t->header = CreateWindowExW(0,
 		WC_HEADERW, L"",
+		// don't set WS_VISIBLE; according to MSDN we create the header hidden as part of setting the initial position (http://msdn.microsoft.com/en-us/library/windows/desktop/ff485935%28v=vs.85%29.aspx)
 		// TODO WS_BORDER?
 		// TODO is HDS_HOTTRACK needed?
 		WS_CHILD | HDS_FULLDRAG | HDS_HORZ | HDS_HOTTRACK,
@@ -21,5 +22,19 @@ static void destroyHeader(struct table *t)
 
 static void repositionHeader(struct table *t)
 {
-	// TODO http://msdn.microsoft.com/en-us/library/windows/desktop/hh298357%28v=vs.85%29.aspx
+	RECT r;
+	WINDOWPOS wp;
+	HDLAYOUT l;
+
+	if (GetClientRect(t->hwnd, &r) == 0)
+		panic("error getting client rect for Table header repositioning");
+	l.prc = &r;
+	l.pwpos = &wp;
+	if (SendMessageW(t->header, HDM_LAYOUT, 0, (LPARAM) (&l)) == FALSE)
+		panic("error getting new Table header position");
+	if (SetWindowPos(t->header, wp.hwndInsertAfter,
+		wp.x, wp.y, wp.cx, wp.cy,
+		// see above on showing the header here instead of in the CreateWindowExW() call
+		wp.flags | SWP_SHOWWINDOW) == 0)
+		panic("error repositioning Table header");
 }
diff --git a/wintable/new/main.c b/wintable/new/main.c
index 496af07..84508bb 100644
--- a/wintable/new/main.c
+++ b/wintable/new/main.c
@@ -56,10 +56,12 @@ struct table {
 #include "events.h"
 #include "header.h"
 #include "children.h"
+#include "resize.h"
 
 static const handlerfunc handlers[] = {
 	eventHandlers,
 	childrenHandlers,
+	resizeHandler,
 	NULL,
 };
 
diff --git a/wintable/new/resize.h b/wintable/new/resize.h
new file mode 100644
index 0000000..1c5307e
--- /dev/null
+++ b/wintable/new/resize.h
@@ -0,0 +1,17 @@
+// 7 december 2014
+
+// TODO why doesn't this trigger on first show?
+
+HANDLER(resizeHandler)
+{
+	WINDOWPOS *wp;
+
+	if (uMsg != WM_WINDOWPOSCHANGED)
+		return FALSE;
+	wp = (WINDOWPOS *) lParam;
+	if ((wp->flags & SWP_NOSIZE) != 0)
+		return FALSE;
+	repositionHeader(t);
+	*lResult = 0;
+	return TRUE;
+}