[Qemu-devel] [PATCH v2] ui/cocoa.m: verify with user before quitting QEMU

[Programmingkid]

This patch prevents the user from accidentally quitting QEMU by pushing 
Command-Q or by pushing the close button on the main window. When the user does
one of these two things, a dialog box appears verifying with the user if he or
she wants to quit QEMU.

Signed-off-by: John Arbuckle <programmingk...@gmail.com>

---
 ui/cocoa.m |   35 +++++++++++++++++++++++++++++++++--
 1 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/ui/cocoa.m b/ui/cocoa.m
index 334e6f6..3c5172c 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -807,10 +807,11 @@ QemuCocoaView *cocoaView;
     QemuCocoaAppController
  ------------------------------------------------------
 */
-@interface QemuCocoaAppController : NSObject
+@interface QemuCocoaAppController : NSObject <NSWindowDelegate
 #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6)
-                                             <NSApplicationDelegate>
+                                             , NSApplicationDelegate
 #endif
+>
 {
 }
 - (void)startEmulationWithArgc:(int)argc argv:(char**)argv;
@@ -829,6 +830,7 @@ QemuCocoaView *cocoaView;
 - (void)powerDownQEMU:(id)sender;
 - (void)ejectDeviceMedia:(id)sender;
 - (void)changeDeviceMedia:(id)sender;
+- (BOOL)verifyQuit;
 @end
 
 @implementation QemuCocoaAppController
@@ -862,6 +864,7 @@ QemuCocoaView *cocoaView;
 #endif
         [normalWindow makeKeyAndOrderFront:self];
         [normalWindow center];
+        [normalWindow setDelegate: self];
         stretch_video = false;
 
         /* Used for displaying pause on the screen */
@@ -933,6 +936,21 @@ QemuCocoaView *cocoaView;
     return YES;
 }
 
+- (NSApplicationTerminateReply)applicationShouldTerminate:
+                                                         (NSApplication 
*)sender
+{
+    COCOA_DEBUG("QemuCocoaAppController: applicationShouldTerminate\n");
+    return [self verifyQuit];
+}
+
+/* Called when the user clicks on a window's close button */
+- (BOOL)windowShouldClose:(id)sender
+{
+    COCOA_DEBUG("QemuCocoaAppController: windowShouldClose\n");
+    [NSApp terminate: sender];
+    return NO; /* The main window should always be available */
+}
+
 - (void)startEmulationWithArgc:(int)argc argv:(char**)argv
 {
     COCOA_DEBUG("QemuCocoaAppController: startEmulationWithArgc\n");
@@ -1125,6 +1143,19 @@ QemuCocoaView *cocoaView;
     }
 }
 
+/* Verifies if the user really wants to quit */
+- (BOOL)verifyQuit
+{
+    NSInteger response;
+    response = NSRunAlertPanel(@"Quit?", @"Are you sure you want to quit?",
+                                                       @"Cancel", @"Quit", 
nil);
+    if(response == NSAlertAlternateReturn) {
+        return YES; /* Yes, I want to quit */
+    } else {
+        return NO; /* No, I don't want to quit */
+    }
+}
+
 @end
 
 
-- 
1.7.5.4