Implemented uiTab on Windows.

new/tab_windows.c

@@ -0,0 +1,189 @@
+// 12 april 2015
+#include "uipriv_windows.h"
+
+struct tab {
+	struct tabPage *pages;
+	uintmax_t len;
+	uintmax_t cap;
+};
+
+struct tabPage {
+	uiControl *child;
+};
+
+static BOOL onWM_COMMAND(uiControl *c, WORD code, LRESULT *lResult)
+{
+	return FALSE;
+}
+
+// we have to handle hiding and showing of tab pages ourselves
+static BOOL onWM_NOTIFY(uiControl *c, NMHDR *nm, LRESULT *lResult)
+{
+	struct tab *t = (struct tab *) (c->data);
+	LRESULT n;
+
+	switch (nm->code) {
+	case TCN_SELCHANGING:
+		n = SendMessageW((HWND) uiControlHandle(c), TCM_GETCURSEL, 0, 0);
+		if (n != (LRESULT) (-1))		// if we're changing to a real tab
+			uiControlContainerHide(t->pages[n].child);
+		*lResult = FALSE;			// and allow the change
+		return TRUE;
+	case TCN_SELCHANGE:
+		n = SendMessageW((HWND) uiControlHandle(c), TCM_GETCURSEL, 0, 0);
+		if (n != (LRESULT) (-1)) {		// if we're changing to a real tab
+			uiControlContainerShow(t->pages[n].child);
+			// because we only resize the current child on resize, we'll need to trigger an update here
+			updateParent(uiControlHandle(c));
+		}
+		*lResult = 0;
+		return TRUE;
+	}
+	return FALSE;
+}
+
+static void onWM_DESTROY(uiControl *c)
+{
+	struct tab *t = (struct tab *) (c->data);
+
+	uiFree(t->pages);
+	uiFree(t);
+}
+
+static void preferredSize(uiControl *c, uiSizing *d, intmax_t *width, intmax_t *height)
+{
+	// TODO
+}
+
+// common code for resizes
+static void resizeTab(uiControl *c, LONG width, LONG height)
+{
+	struct tab *t = (struct tab *) (c->data);
+	HWND hwnd;
+	LRESULT n;
+	RECT r, margin;
+
+	hwnd = (HWND) uiControlHandle(c);
+
+	n = SendMessageW(hwnd, TCM_GETCURSEL, 0, 0);
+	if (n == (LRESULT) (-1))		// no child selected; do nothing
+		return;
+
+	// make a rect at (0, 0) of the given window size
+	// this should give us the correct client coordinates
+	r.left = 0;
+	r.top = 0;
+	r.right = width;
+	r.bottom = height;
+	// convert to the display rectangle
+	SendMessageW(hwnd, TCM_ADJUSTRECT, FALSE, (LPARAM) (&r));
+
+	margin.left = 0;
+	margin.top = 0;
+	margin.right = 0;
+	margin.bottom = 0;
+/*TODO	if (w->margined) {
+		margin.left = windowMargin;
+		margin.top = windowMargin;
+		margin.right = windowMargin;
+		margin.bottom = windowMargin;
+	}
+*/	resize(t->pages[n].child, hwnd, r, margin);
+}
+
+// and finally, because we are a container, we have to handle resizes and updates
+static LRESULT CALLBACK tabSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
+{
+	uiControl *c = (uiControl *) dwRefData;
+	LRESULT lResult;
+	WINDOWPOS *wp = (WINDOWPOS *) lParam;
+	RECT r;
+
+	if (sharedWndProc(hwnd, uMsg, wParam, lParam, &lResult) != FALSE)
+		return lResult;
+	switch (uMsg) {
+	case WM_WINDOWPOSCHANGED:
+		if ((wp->flags & SWP_NOSIZE) != 0)
+			break;
+		// first, let the tab control handle it
+		lResult = (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
+		// we have the window rect width as part of the WINDOWPOS; resize
+		resizeTab(c, wp->cx, wp->cy);
+		return lResult;
+	case msgUpdateChild:
+		if (GetWindowRect((HWND) uiControlHandle(c), &r) == 0)
+			logLastError("error getting window rect for Tab resize in tabSubProc()");
+		// though these are in screen coordinates, we only need the width and height
+		resizeTab(c, r.right - r.left, r.bottom - r.top);
+		return 0;
+	case WM_NCDESTROY:
+		if ((*fv_RemoveWindowSubclass)(hwnd, tabSubProc, uIdSubclass) == FALSE)
+			logLastError("error removing Tab resize handling subclass in tabSubProc()");
+		break;
+	}
+	return (*fv_DefSubclassProc)(hwnd, uMsg, wParam, lParam);
+}
+
+uiControl *uiNewTab(void)
+{
+	uiControl *c;
+	struct tab *t;
+	uiWindowsNewControlParams p;
+	HWND hwnd;
+
+	p.dwExStyle = 0;		// don't set WS_EX_CONTROLPARENT yet; we do that dynamically in the message loop (see main_windows.c)
+	p.lpClassName = WC_TABCONTROLW;
+	p.lpWindowName = L"";
+	p.dwStyle = TCS_TOOLTIPS | WS_TABSTOP;
+	p.hInstance = hInstance;
+	p.useStandardControlFont = TRUE;
+	p.onWM_COMMAND = onWM_COMMAND;
+	p.onWM_NOTIFY = onWM_NOTIFY;
+	p.onWM_DESTROY = onWM_DESTROY;
+	c = uiWindowsNewControl(&p);
+
+	c->preferredSize = preferredSize;
+
+	t = uiNew(struct tab);
+	c->data = t;
+
+	hwnd = (HWND) uiControlHandle(c);
+	if ((*fv_SetWindowSubclass)(hwnd, tabSubProc, 0, (DWORD_PTR) c) == FALSE)
+		logLastError("error subclassing Tab to give it its own resize handler in uiNewTab()");
+
+	return c;
+}
+
+#define tabCapGrow 32
+
+void uiTabAddPage(uiControl *c, const char *name, uiControl *child)
+{
+	struct tab *t = (struct tab *) (c->data);
+	HWND hwnd;
+	TCITEMW item;
+	LRESULT n;
+	WCHAR *wname;
+
+	if (t->len >= t->cap) {
+		t->cap += tabCapGrow;
+		t->pages = (struct tabPage *) uiRealloc(t->pages, t->cap * sizeof (struct tabPage), "struct tabPage[]");
+	}
+
+	hwnd = (HWND) uiControlHandle(c);
+	n = SendMessageW(hwnd, TCM_GETITEMCOUNT, 0, 0);
+
+	t->pages[t->len].child = child;
+	uiControlSetParent(t->pages[t->len].child, (uintptr_t) hwnd);
+	if (n != 0)		// if this isn't the first page, we have to hide the other controls
+		uiControlContainerHide(t->pages[t->len].child);
+	t->len++;
+
+	ZeroMemory(&item, sizeof (TCITEMW));
+	item.mask = TCIF_TEXT;
+	wname = toUTF16(name);
+	item.pszText = wname;
+	// MSDN's example code uses the first invalid index directly for this
+	if (SendMessageW(hwnd, TCM_INSERTITEM, (WPARAM) n, (LPARAM) (&item)) == (LRESULT) -1)
+		logLastError("error adding tab to Tab in uiTabAddPage()");
+	uiFree(wname);
+}