macosx: improve handling the mute action in the main window. disable slider...

macosx: improve handling the mute action in the main window. disable slider and fullvolume button in case mute is active. (fixes #5800)
(cherry picked from commit df8a9d08077afb7de671c3d6de4bde323de5c61c)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

extras/package/macosx/Resources/English.lproj/MainMenu.xib

@@ -21,16 +21,16 @@
     </object>
     <object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
       <bool key="EncodedWithXMLCoder">YES</bool>
+      <integer value="2770"/>
       <integer value="1617"/>
-      <integer value="4756"/>
-      <integer value="915"/>
-      <integer value="4895"/>
       <integer value="29"/>
-      <integer value="2770"/>
-      <integer value="2730"/>
-      <integer value="4596"/>
+      <integer value="21"/>
       <integer value="4722"/>
+      <integer value="915"/>
+      <integer value="4596"/>
       <integer value="283"/>
+      <integer value="4895"/>
+      <integer value="2730"/>
     </object>
     <object class="NSArray" key="IBDocument.PluginDependencies">
       <bool key="EncodedWithXMLCoder">YES</bool>
@@ -969,7 +969,7 @@
                     <string key="NSContents"/>
                     <reference key="NSSupport" ref="188716167"/>
                     <reference key="NSControlView" ref="474770834"/>
-                    <int key="NSButtonFlags">-2039217921</int>
+                    <int key="NSButtonFlags">141820159</int>
                     <int key="NSButtonFlags2">2</int>
                     <object class="NSCustomResource" key="NSNormalImage" id="267511931">
                       <string key="NSClassName">NSImage</string>
@@ -1020,7 +1020,7 @@
                     <string key="NSContents"/>
                     <reference key="NSSupport" ref="188716167"/>
                     <reference key="NSControlView" ref="963106097"/>
-                    <int key="NSButtonFlags">-2039217921</int>
+                    <int key="NSButtonFlags">141820159</int>
                     <int key="NSButtonFlags2">2</int>
                     <object class="NSCustomResource" key="NSNormalImage" id="112655283">
                       <string key="NSClassName">NSImage</string>

modules/gui/macosx/MainWindow.h

@@ -73,7 +73,6 @@
     BOOL b_nativeFullscreenMode;
     BOOL b_video_playback_enabled;
     int i_lastShownVolume;
-    BOOL b_mute;
     input_state_e cachedInputState;
 
     NSImage * o_pause_img;

modules/gui/macosx/MainWindow.m

@@ -232,6 +232,9 @@ static VLCMainWindow *_o_sharedInstance = nil;
     [o_shuffle_btn setAlternateImage: o_shuffle_pressed_img];
     [o_play_btn setImage: o_play_img];
     [o_play_btn setAlternateImage: o_play_pressed_img];
+    BOOL b_mute = ![[VLCCoreInteraction sharedInstance] isMuted];
+    [o_volume_sld setEnabled: b_mute];
+    [o_volume_up_btn setEnabled: b_mute];
 
     /* interface builder action */
     [self setDelegate: self];
@@ -673,7 +676,13 @@ static VLCMainWindow *_o_sharedInstance = nil;
     if (sender == o_volume_sld)
         [[VLCCoreInteraction sharedInstance] setVolume: [sender intValue]];
     else if (sender == o_volume_down_btn)
+    {
         [[VLCCoreInteraction sharedInstance] mute];
+        [o_volume_sld setIntValue: 0];
+        BOOL b_mute = ![[VLCCoreInteraction sharedInstance] isMuted];
+        [o_volume_sld setEnabled: b_mute];
+        [o_volume_up_btn setEnabled: b_mute];
+    }
     else
         [[VLCCoreInteraction sharedInstance] setVolume: AOUT_VOLUME_MAX];
 }