From http://www.jwz.org/xscreensaver/xscreensaver-5.22.tar.gz

[xscreensaver] / OSX / SaverListController.m

diff --git a/OSX/SaverListController.m b/OSX/SaverListController.m
index 75e8751ba2b59a0f7529e0e5c873ea0b01c37c37..e0abeca61db2eead825090e704b44aad8241ade9 100644 (file)
--- a/OSX/SaverListController.m
+++ b/OSX/SaverListController.m
@@ -1,4 +1,4 @@
-/* xscreensaver, Copyright (c) 2012 Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 2012-2013 Jamie Zawinski <jwz@jwz.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
@@ -16,6 +16,7 @@
 
 #import "SaverListController.h"
 #import "SaverRunner.h"
+#import "yarandom.h"
 #import "version.h"
 
 #undef countof
@@ -35,6 +36,7 @@
 {
   // Extract the version number and release date from the version string.
   // Here's an area where I kind of wish I had "Two Problems".
+  // I guess I could add custom key to the Info.plist for this.
 
   NSArray *a = [[NSString stringWithCString: screensaver_id
                           encoding:NSASCIIStringEncoding]
@@ -246,8 +248,7 @@
   SaverRunner *s = 
     (SaverRunner *) [[UIApplication sharedApplication] delegate];
   if (! s) return;
-  if (! [s isKindOfClass:[SaverRunner class]])
-    abort();
+  NSAssert ([s isKindOfClass:[SaverRunner class]], @"not a SaverRunner");
   [s loadSaver: cell.textLabel.text];
 }
 
@@ -260,8 +261,7 @@
   SaverRunner *s = 
     (SaverRunner *) [[UIApplication sharedApplication] delegate];
   if (! s) return;
-  if (! [s isKindOfClass:[SaverRunner class]])
-    abort();
+  NSAssert ([s isKindOfClass:[SaverRunner class]], @"not a SaverRunner");
   [s openPreferences: cell.textLabel.text];
 }
 
@@ -296,6 +296,45 @@
 }
 
 
+/* We need this to respond to "shake" gestures
+ */
+- (BOOL)canBecomeFirstResponder
+{
+  return YES;
+}
+
+- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
+{
+}
+
+- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event
+{
+}
+
+
+/* Shake means load a random screen saver.
+ */
+- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
+{
+  if (motion != UIEventSubtypeMotionShake)
+    return;
+  NSMutableArray *a = [NSMutableArray arrayWithCapacity: 200];
+  for (NSArray *sec in letter_sections)
+    for (NSString *s in sec)
+      [a addObject: s];
+  int n = [a count];
+  if (! n) return;
+  NSString *which = [a objectAtIndex: (random() % n)];
+
+  SaverRunner *s = 
+    (SaverRunner *) [[UIApplication sharedApplication] delegate];
+  if (! s) return;
+  NSAssert ([s isKindOfClass:[SaverRunner class]], @"not a SaverRunner");
+  [self scrollTo: which];
+  [s loadSaver: which];
+}
+
+
 - (void)dealloc
 {
   for (int i = 0; i < countof(list_by_letter); i++)