First Commit

libui-ng/windows/tabpage.cpp

@@ -0,0 +1,149 @@
+// 30 may 2015
+#include "uipriv_windows.hpp"
+
+// TODO refine error handling
+
+// from http://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
+#define tabMargin 7
+
+static void tabPageMargins(struct tabPage *tp, int *mx, int *my)
+{
+	uiWindowsSizing sizing;
+
+	*mx = 0;
+	*my = 0;
+	if (!tp->margined)
+		return;
+	uiWindowsGetSizing(tp->hwnd, &sizing);
+	*mx = tabMargin;
+	*my = tabMargin;
+	uiWindowsSizingDlgUnitsToPixels(&sizing, mx, my);
+}
+
+static void tabPageRelayout(struct tabPage *tp)
+{
+	RECT r;
+	int mx, my;
+	HWND child;
+
+	if (tp->child == NULL)
+		return;
+	uiWindowsEnsureGetClientRect(tp->hwnd, &r);
+	tabPageMargins(tp, &mx, &my);
+	r.left += mx;
+	r.top += my;
+	r.right -= mx;
+	r.bottom -= my;
+	child = (HWND) uiControlHandle(tp->child);
+	uiWindowsEnsureMoveWindowDuringResize(child, r.left, r.top, r.right - r.left, r.bottom - r.top);
+}
+
+// dummy dialog procedure; see below for details
+// let's handle parent messages here to avoid needing to subclass
+// TODO do we need to handle DM_GETDEFID/DM_SETDEFID here too because of the ES_WANTRETURN stuff at http://blogs.msdn.com/b/oldnewthing/archive/2007/08/20/4470527.aspx? what about multiple default buttons (TODO)?
+// TODO we definitely need to do something about edit message handling; it does a fake close of our parent on pressing escape, causing uiWindow to stop responding to maximizes but still respond to events and then die horribly on destruction
+static INT_PTR CALLBACK dlgproc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+	struct tabPage *tp;
+	LRESULT lResult;
+
+	if (uMsg == WM_INITDIALOG) {
+		tp = (struct tabPage *) lParam;
+		tp->hwnd = hwnd;
+		SetWindowLongPtrW(hwnd, DWLP_USER, (LONG_PTR) tp);
+		return TRUE;
+	}
+	if (handleParentMessages(hwnd, uMsg, wParam, lParam, &lResult) != FALSE) {
+		SetWindowLongPtrW(hwnd, DWLP_MSGRESULT, (LONG_PTR) lResult);
+		return TRUE;
+	}
+	if (uMsg == WM_WINDOWPOSCHANGED) {
+		tp = (struct tabPage *) GetWindowLongPtrW(hwnd, DWLP_USER);
+		tabPageRelayout(tp);
+		// pretend the dialog hasn't handled this just in case the system needs to do something special
+		return FALSE;
+	}
+
+	// unthemed dialogs don't respond to WM_PRINTCLIENT
+	// fortunately they don't have any special painting
+	if (uMsg == WM_PRINTCLIENT) {
+		// don't worry about the return value; hopefully DefWindowProcW() caught it (if not the dialog procedure itself)
+		// we COULD paint the dialog background brush ourselves but meh, it works
+		SendMessageW(hwnd, WM_ERASEBKGND, wParam, lParam);
+		// and pretend we did nothing just so the themed dialog can still paint its content
+		// TODO see if w ecan avoid erasing the background in this case in the first place, or if we even need to
+		return FALSE;
+	}
+
+	return FALSE;
+}
+
+// because Windows doesn't really support resources in static libraries, we have to embed this directly; oh well
+/*
+// this is the dialog template used by tab pages; see windows/tabpage.c for details
+rcTabPageDialog DIALOGEX 0, 0, 100, 100
+STYLE DS_CONTROL | WS_CHILD | WS_VISIBLE
+EXSTYLE WS_EX_CONTROLPARENT
+BEGIN
+	// nothing
+END
+*/
+static const uint8_t data_rcTabPageDialog[] = {
+	0x01, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x01, 0x00, 0x00, 0x04, 0x00, 0x50,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x64, 0x00,
+	0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+static_assert(ARRAYSIZE(data_rcTabPageDialog) == 32, "wrong size for resource rcTabPageDialog");
+
+struct tabPage *newTabPage(uiControl *child)
+{
+	struct tabPage *tp;
+	HRESULT hr;
+
+	tp = uiprivNew(struct tabPage);
+
+	// unfortunately this needs to be a proper dialog for EnableThemeDialogTexture() to work; CreateWindowExW() won't suffice
+	if (CreateDialogIndirectParamW(hInstance, (const DLGTEMPLATE *) data_rcTabPageDialog,
+		utilWindow, dlgproc, (LPARAM) tp) == NULL)
+		logLastError(L"error creating tab page");
+
+	tp->child = child;
+	if (tp->child != NULL) {
+		uiWindowsEnsureSetParentHWND((HWND) uiControlHandle(tp->child), tp->hwnd);
+		uiWindowsControlAssignSoleControlIDZOrder(uiWindowsControl(tp->child));
+	}
+
+	hr = EnableThemeDialogTexture(tp->hwnd, ETDT_ENABLE | ETDT_USETABTEXTURE | ETDT_ENABLETAB);
+	if (hr != S_OK)
+		logHRESULT(L"error setting tab page background", hr);
+		// continue anyway; it'll look wrong but eh
+
+	// and start the tab page hidden
+	ShowWindow(tp->hwnd, SW_HIDE);
+
+	return tp;
+}
+
+void tabPageDestroy(struct tabPage *tp)
+{
+	// don't destroy the child with the page
+	if (tp->child != NULL)
+		uiWindowsControlSetParentHWND(uiWindowsControl(tp->child), NULL);
+	// don't call EndDialog(); that's for the DialogBox() family of functions instead of CreateDialog()
+	uiWindowsEnsureDestroyWindow(tp->hwnd);
+	uiprivFree(tp);
+}
+
+void tabPageMinimumSize(struct tabPage *tp, int *width, int *height)
+{
+	int mx, my;
+
+	*width = 0;
+	*height = 0;
+	if (tp->child != NULL)
+		uiWindowsControlMinimumSize(uiWindowsControl(tp->child), width, height);
+	tabPageMargins(tp, &mx, &my);
+	*width += 2 * mx;
+	*height += 2 * my;
+}