Added Windows child.c.

redo/windows/child.c

@@ -0,0 +1,86 @@
+// 28 august 2015
+#include "uipriv_windows.h"
+
+// This file contains helpers for managing child controls.
+
+struct child {
+	uiControl *c;
+	HWND hwnd;
+
+	HWND parent;
+
+	// This flag is for users of these functions.
+	// For uiBox, this is "spaced".
+	// For uiTab, this is "margined". (uiGroup and uiWindow have to maintain their margined state themselves, since the margined state is independent of whether there is a child for those two.)
+	int flag;
+};
+
+struct child *newChild(uiControl *child, uiControl *parent, HWND parentHWND)
+{
+	struct child *c;
+
+	if (child == NULL)
+		return NULL;
+
+	c = uiNew(struct child);
+	c->c = child;
+	c->hwnd = (HWND) uiControlHandle(c->c);
+
+	uiControlSetParent(c->c, parent);
+	uiWindowsEnsureSetParent(c->hwnd, parentHWND);
+	c->parent = parentHWND;
+
+	return c;
+}
+
+void childRemove(struct child *c)
+{
+	uiWindowsEnsureSetParent(c->hwnd, utilwin);
+	uiControlSetParent(c->c, NULL);
+	uiFree(c);
+}
+
+void childDestroy(struct child *c)
+{
+	uiControl *child;
+
+	child = c->c;
+	childRemove(c);
+	uiControlDestroy(child);
+}
+
+HWND childHWND(struct child *c)
+{
+	return c->hwnd;
+}
+
+void childMinimumSize(struct child *c, uiWindowsSizing *d, intmax_t *width, intmax_t *height)
+{
+	uiWindowsControl *wc;
+
+	wc = uiWindowsControl(c->c);
+	(*(wc->MinimumSize))(wc, d, width, height);
+}
+
+void childRelayout(struct child *c, intmax_t x, intmax_t y, intmax_t width, intmax_t height)
+{
+	uiWindowsControl *wc;
+
+	wc = uiWindowsControl(c->c);
+	(*(wc->Relayout))(wc, x, y, width, height);
+}
+
+void childUpdateState(struct child *c)
+{
+	controlUpdateState(c->c);
+}
+
+int childFlag(struct child *c)
+{
+	return c->flag;
+}
+
+void childSetFlag(struct child *c, int flag)
+{
+	c->flag = flag;
+}