First Commit

libui-ng/windows/editablecombo.cpp

@@ -0,0 +1,117 @@
+// 20 may 2015
+#include "uipriv_windows.hpp"
+
+// TODO no scrollbars? also not sure if true for combobox as well
+
+// we as Common Controls 6 users don't need to worry about the height of comboboxes; see http://blogs.msdn.com/b/oldnewthing/archive/2006/03/10/548537.aspx
+
+struct uiEditableCombobox {
+	uiWindowsControl c;
+	HWND hwnd;
+	void (*onChanged)(uiEditableCombobox *, void *);
+	void *onChangedData;
+};
+
+static BOOL onWM_COMMAND(uiControl *cc, HWND hwnd, WORD code, LRESULT *lResult)
+{
+	uiEditableCombobox *c = uiEditableCombobox(cc);
+
+	if (code == CBN_SELCHANGE) {
+		// like on OS X, this is sent before the edit has been updated :(
+		if (PostMessage(parentOf(hwnd),
+			WM_COMMAND,
+			MAKEWPARAM(GetWindowLongPtrW(hwnd, GWLP_ID), CBN_EDITCHANGE),
+			(LPARAM) hwnd) == 0)
+			logLastError(L"error posting CBN_EDITCHANGE after CBN_SELCHANGE");
+		*lResult = 0;
+		return TRUE;
+	}
+	if (code != CBN_EDITCHANGE)
+		return FALSE;
+	(*(c->onChanged))(c, c->onChangedData);
+	*lResult = 0;
+	return TRUE;
+}
+
+void uiEditableComboboxDestroy(uiControl *cc)
+{
+	uiEditableCombobox *c = uiEditableCombobox(cc);
+
+	uiWindowsUnregisterWM_COMMANDHandler(c->hwnd);
+	uiWindowsEnsureDestroyWindow(c->hwnd);
+	uiFreeControl(uiControl(c));
+}
+
+uiWindowsControlAllDefaultsExceptDestroy(uiEditableCombobox)
+
+// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
+#define comboboxWidth 107	/* this is actually the shorter progress bar width, but Microsoft only indicates as wide as necessary; LONGTERM */
+#define comboboxHeight 14	/* LONGTERM: is this too high? */
+
+static void uiEditableComboboxMinimumSize(uiWindowsControl *cc, int *width, int *height)
+{
+	uiEditableCombobox *c = uiEditableCombobox(cc);
+	uiWindowsSizing sizing;
+	int x, y;
+
+	x = comboboxWidth;
+	y = comboboxHeight;
+	uiWindowsGetSizing(c->hwnd, &sizing);
+	uiWindowsSizingDlgUnitsToPixels(&sizing, &x, &y);
+	*width = x;
+	*height = y;
+}
+
+static void defaultOnChanged(uiEditableCombobox *c, void *data)
+{
+	// do nothing
+}
+
+void uiEditableComboboxAppend(uiEditableCombobox *c, const char *text)
+{
+	WCHAR *wtext;
+	LRESULT res;
+
+	wtext = toUTF16(text);
+	res = SendMessageW(c->hwnd, CB_ADDSTRING, 0, (LPARAM) wtext);
+	if (res == (LRESULT) CB_ERR)
+		logLastError(L"error appending item to uiEditableCombobox");
+	else if (res == (LRESULT) CB_ERRSPACE)
+		logLastError(L"memory exhausted appending item to uiEditableCombobox");
+	uiprivFree(wtext);
+}
+
+char *uiEditableComboboxText(uiEditableCombobox *c)
+{
+	return uiWindowsWindowText(c->hwnd);
+}
+
+void uiEditableComboboxSetText(uiEditableCombobox *c, const char *text)
+{
+	// does not trigger any notifications
+	uiWindowsSetWindowText(c->hwnd, text);
+}
+
+void uiEditableComboboxOnChanged(uiEditableCombobox *c, void (*f)(uiEditableCombobox *c, void *data), void *data)
+{
+	c->onChanged = f;
+	c->onChangedData = data;
+}
+
+uiEditableCombobox *uiNewEditableCombobox(void)
+{
+	uiEditableCombobox *c;
+
+	uiWindowsNewControl(uiEditableCombobox, c);
+
+	c->hwnd = uiWindowsEnsureCreateControlHWND(WS_EX_CLIENTEDGE,
+		L"combobox", L"",
+		CBS_DROPDOWN | WS_TABSTOP,
+		hInstance, NULL,
+		TRUE);
+
+	uiWindowsRegisterWM_COMMANDHandler(c->hwnd, onWM_COMMAND, uiControl(c));
+	uiEditableComboboxOnChanged(c, defaultOnChanged, NULL);
+
+	return c;
+}