[Add] Allert windows as a way to warn the user of something.

src/toolkit.c

@@ -112,6 +112,8 @@ static void toolkit_drawOutline(double x, double y, double w,
 			double h, double b, glColour* c, glColour* lc);
 static void toolkit_drawRect(double x, double y, double w, double h,
 			glColour* c, glColour* lc);
+// Misc.
+static void toolkit_alertClose(char* str);
 
 // Add a button that when pressed will trigger call, passing it's name as the
 // only parameter.
@@ -1060,6 +1062,36 @@ static Widget* toolkit_getFocus(void) {
 	return &wdw->widgets[wdw->focus];
 }
 
+void toolkit_alert(const char* fmt, ...) {
+	char msg[256];
+	va_list ap;
+	unsigned int wdw;
+
+	if(window_exists("Warning")) return;
+
+	if(fmt == NULL) return;
+	else {
+		// Get the message.
+		va_start(ap, fmt);
+		vsprintf(msg, fmt, ap);
+		va_end(ap);
+	}
+
+	wdw = window_create("Warning", -1, -1, 300, 140);
+
+	window_addText(wdw, 20, -30, 260, 70, 0, "txtAlert",
+				&gl_smallFont, &cBlack, msg);
+	
+	window_addButton(wdw, 135, 20, 50, 30, "btnOK", "OK",
+				toolkit_alertClose);
+}
+
+static void toolkit_alertClose(char* str) {
+	(void)str;
+	if(window_exists("Warning"))
+		window_destroy(window_get("Warning"));
+}
+
 // Init.
 int toolkit_init(void) {
   windows = malloc(sizeof(Window)*MIN_WINDOWS);

src/toolkit.h

@@ -30,6 +30,9 @@ void window_addRect(const unsigned int wid,
 			const int w, const int h, // size.
 			char* name, glColour* colour, int border); // Properties.
 
+// Popups and alerts.
+void toolkit_alert(const char* fmt, ...);
+
 // Modification
 void window_modifyText(const unsigned int wid, char* name, char* newstring);
 void window_modifyImage(const unsigned int wid, char* name, glTexture* image);