1 files changed, 62 insertions, 0 deletions
diff --git a/src/libui_sdl/libui/windows/sizing.cpp b/src/libui_sdl/libui/windows/sizing.cpp
new file mode 100644
index 0000000..a6d25d6
--- /dev/null
+++ b/src/libui_sdl/libui/windows/sizing.cpp
@@ -0,0 +1,62 @@
+// 14 may 2015
+#include "uipriv_windows.hpp"
+
+// TODO rework the error handling
+void getSizing(HWND hwnd, uiWindowsSizing *sizing, HFONT font)
+{
+	HDC dc;
+	HFONT prevfont;
+	TEXTMETRICW tm;
+	SIZE size;
+
+	dc = GetDC(hwnd);
+	if (dc == NULL)
+		logLastError(L"error getting DC");
+	prevfont = (HFONT) SelectObject(dc, font);
+	if (prevfont == NULL)
+		logLastError(L"error loading control font into device context");
+
+	ZeroMemory(&tm, sizeof (TEXTMETRICW));
+	if (GetTextMetricsW(dc, &tm) == 0)
+		logLastError(L"error getting text metrics");
+	if (GetTextExtentPoint32W(dc, L"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 52, &size) == 0)
+		logLastError(L"error getting text extent point");
+
+	sizing->BaseX = (int) ((size.cx / 26 + 1) / 2);
+	sizing->BaseY = (int) tm.tmHeight;
+	sizing->InternalLeading = tm.tmInternalLeading;
+
+	if (SelectObject(dc, prevfont) != font)
+		logLastError(L"error restoring previous font into device context");
+	if (ReleaseDC(hwnd, dc) == 0)
+		logLastError(L"error releasing DC");
+}
+
+void uiWindowsGetSizing(HWND hwnd, uiWindowsSizing *sizing)
+{
+	return getSizing(hwnd, sizing, hMessageFont);
+}
+
+#define dlgUnitsToX(dlg, baseX) MulDiv((dlg), (baseX), 4)
+#define dlgUnitsToY(dlg, baseY) MulDiv((dlg), (baseY), 8)
+
+void uiWindowsSizingDlgUnitsToPixels(uiWindowsSizing *sizing, int *x, int *y)
+{
+	if (x != NULL)
+		*x = dlgUnitsToX(*x, sizing->BaseX);
+	if (y != NULL)
+		*y = dlgUnitsToY(*y, sizing->BaseY);
+}
+
+// from https://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing and https://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
+// this X value is really only for buttons but I don't see a better one :/
+#define winXPadding 4
+#define winYPadding 4
+
+void uiWindowsSizingStandardPadding(uiWindowsSizing *sizing, int *x, int *y)
+{
+	if (x != NULL)
+		*x = dlgUnitsToX(winXPadding, sizing->BaseX);
+	if (y != NULL)
+		*y = dlgUnitsToY(winYPadding, sizing->BaseY);
+}