From fecb7caa14e3180f854217c39c505667f07c31f1 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Tue, 7 Apr 2015 03:39:47 -0400
Subject: [PATCH] Hooked up resizing. Now to make a control that uses this.

---
 ui_windows.h     |  4 ++++
 uipriv_windows.h |  1 +
 util_windows.c   | 29 +++++++++++++++++++++++++++++
 window_windows.c | 12 ++++++++++++
 4 files changed, 46 insertions(+)

diff --git a/ui_windows.h b/ui_windows.h
index 330b7cba..6186a619 100644
--- a/ui_windows.h
+++ b/ui_windows.h
@@ -33,4 +33,8 @@ struct uiWindowsNewControlParams {
 };
 uiControl *uiWindowsNewControl(uiWindowsNewControlParams *);
 
+// use these in your preferredSize() implementation with baseX and baseY
+#define uiDlgUnitToX(dlg, baseX) MulDiv((dlg), baseX, 4)
+#define uiDlgUnitToY(dlg, baseY) MulDiv((dlg), baseY, 8)
+
 #endif
diff --git a/uipriv_windows.h b/uipriv_windows.h
index c7527c0d..d415100a 100644
--- a/uipriv_windows.h
+++ b/uipriv_windows.h
@@ -64,6 +64,7 @@ extern HWND initialParent;
 // util_windows.c
 extern WCHAR *toUTF16(const char *);
 extern BOOL sharedWndProc(HWND, UINT, WPARAM, LPARAM, LRESULT *);
+extern void resize(uiControl *, HWND, RECT);
 
 // comctl32_windows.c
 extern BOOL (*WINAPI fv_SetWindowSubclass)(HWND, SUBCLASSPROC, UINT_PTR, DWORD_PTR);
diff --git a/util_windows.c b/util_windows.c
index 62929673..39bffc36 100644
--- a/util_windows.c
+++ b/util_windows.c
@@ -70,3 +70,32 @@ BOOL sharedWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *
 */	}
 	return FALSE;
 }
+
+// TODO add function names
+void resize(uiControl *control, HWND parent, RECT r)
+{
+	uiSizing d;
+	HDC dc;
+	HFONT prevFont;
+	TEXTMETRICW tm;
+	SIZE size;
+
+	dc = GetDC(parent);
+	if (dc == NULL)
+		logLastError("error getting DC for preferred size calculations");
+	prevFont = (HFONT) SelectObject(dc, hMessageFont);
+	if (prevFont == NULL)
+		logLastError("error loading control font into device context for preferred size calculation");
+	if (GetTextMetricsW(dc, &tm) == 0)
+		logLastError("error getting text metrics for preferred size calculations");
+	if (GetTextExtentPoint32W(dc, L"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 52, &size) == 0)
+		logLastError("error getting text extent point for preferred size calculations");
+	d.baseX = (int) ((size.cx / 26 + 1) / 2);
+	d.baseY = (int) tm.tmHeight;
+	d.internalLeading = tm.tmInternalLeading;
+	if (SelectObject(dc, prevFont) != hMessageFont)
+		logLastError("error restoring previous font into device context after preferred size calculations");
+	if (ReleaseDC(parent, dc) == 0)
+		logLastError("error releasing DC for preferred size calculations");
+	(*(control->resize))(control, r.left, r.top, r.right - r.left, r.bottom - r.top, &d);
+}
diff --git a/window_windows.c b/window_windows.c
index c0ca6c35..d5f675e2 100644
--- a/window_windows.c
+++ b/window_windows.c
@@ -3,6 +3,7 @@
 
 struct uiWindow {
 	HWND hwnd;
+	uiControl *child;
 	BOOL shownOnce;
 	int (*onClosing)(uiWindow *, void *);
 	void *onClosingData;
@@ -15,6 +16,8 @@ static LRESULT CALLBACK uiWindowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPA
 	uiWindow *w;
 	CREATESTRUCTW *cs = (CREATESTRUCTW *) lParam;
 	LRESULT lResult;
+	WINDOWPOS *wp = (WINDOWPOS *) lParam;
+	RECT r;
 
 	w = (uiWindow *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
 	if (w == NULL) {
@@ -26,6 +29,15 @@ static LRESULT CALLBACK uiWindowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPA
 	if (sharedWndProc(hwnd, uMsg, wParam, lParam, &lResult) != FALSE)
 		return lResult;
 	switch (uMsg) {
+	case WM_WINDOWPOSCHANGING:
+		if (w->child == NULL)
+			break;
+		if ((wp->flags & SWP_NOSIZE) != 0)
+			break;
+		if (GetClientRect(w->hwnd, &r) == 0)
+			logLastError("error getting window client rect for resize in uiWindowWndProc()");
+		resize(w->child, w->hwnd, r);
+		return 0;
 	case WM_CLOSE:
 		if (!(*(w->onClosing))(w, w->onClosingData))
 			return 0;