Screenshot command line arguments :

* make Screenshot exit gracefully if no argument is given in combination of -d parameter
* honor the delay parameter when also used with the --silent parameter



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32431 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/screenshot/Screenshot.cpp

@@ -91,11 +91,17 @@ Screenshot::ArgvReceived(int32 argc, char** argv)
 		else if (strcmp(argv[i], "-d") == 0
 			|| strncmp(argv[i], "--delay", 7) == 0
 			|| strncmp(argv[i], "--delay=", 8) == 0) {
-			int32 seconds = atoi(argv[i + 1]);
+			int32 seconds = -1;
-			if (seconds > 0) {
+			if (argc > i + 1)
+				seconds = atoi(argv[i + 1]);
+			if (seconds >= 0) {
 				delay = seconds * 1000000;
 				i++;
 			}
+			else {
+				printf("Screenshot: option requires an argument -- %s\n", argv[i]);
+				exit(0);
+			}
 		}
 	}
 	fArgvReceived = true;

src/apps/screenshot/ScreenshotWindow.cpp

@@ -638,6 +638,8 @@ ScreenshotWindow::_TakeScreenshot()
 {
 	if (fDelayControl)
 		snooze((atoi(fDelayControl->Text()) * 1000000) + 50000);
+	else if (fDelay > 0)
+		snooze(fDelay);
 
 	BRect frame;
 	delete fScreenshot;