macosx: fixed appearance issue when collapsing / expanding the playlist while it is empty (close #6382)

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

@@ -22,15 +22,15 @@
     <object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
       <bool key="EncodedWithXMLCoder">YES</bool>
       <integer value="1617"/>
-      <integer value="915"/>
-      <integer value="4756"/>
       <integer value="4596"/>
-      <integer value="4739"/>
+      <integer value="4722"/>
       <integer value="2770"/>
       <integer value="2730"/>
       <integer value="29"/>
+      <integer value="915"/>
       <integer value="4850"/>
       <integer value="4948"/>
+      <integer value="4756"/>
     </object>
     <object class="NSArray" key="IBDocument.PluginDependencies">
       <bool key="EncodedWithXMLCoder">YES</bool>
@@ -7981,6 +7981,14 @@ LCAuLi4</string>
           </object>
           <int key="connectionID">5006</int>
         </object>
+        <object class="IBConnectionRecord">
+          <object class="IBOutletConnection" key="connection">
+            <string key="label">o_dropzone_box</string>
+            <reference key="source" ref="498338108"/>
+            <reference key="destination" ref="83235998"/>
+          </object>
+          <int key="connectionID">5007</int>
+        </object>
       </object>
       <object class="IBMutableOrderedSet" key="objectRecords">
         <object class="NSArray" key="orderedObjects">
@@ -12863,7 +12871,7 @@ LCAuLi4</string>
         </object>
       </object>
       <nil key="sourceID"/>
-      <int key="maxID">5006</int>
+      <int key="maxID">5007</int>
     </object>
     <object class="IBClassDescriber" key="IBDocument.Classes">
       <object class="NSMutableArray" key="referencedPartialClassDescriptions">
@@ -15845,6 +15853,17 @@ LCAuLi4</string>
         <object class="IBPartialClassDescription">
           <string key="className">VLCDetachedVideoWindow</string>
           <string key="superclassName">NSWindow</string>
+          <object class="NSMutableDictionary" key="actions">
+            <string key="NS.key.0">customZoom:</string>
+            <string key="NS.object.0">id</string>
+          </object>
+          <object class="NSMutableDictionary" key="actionInfosByName">
+            <string key="NS.key.0">customZoom:</string>
+            <object class="IBActionInfo" key="NS.object.0">
+              <string key="name">customZoom:</string>
+              <string key="candidateClassName">id</string>
+            </object>
+          </object>
           <object class="IBClassDescriptionSource" key="sourceIdentifier" id="2393087">
             <string key="majorKey">IBDocumentRelativeSource</string>
             <string key="minorKey">../../../../../modules/gui/macosx/MainWindow.h</string>
@@ -17209,6 +17228,7 @@ LCAuLi4</string>
               <string>o_detached_time_sld_fancygradient_view</string>
               <string>o_detached_titlebar_view</string>
               <string>o_detached_video_window</string>
+              <string>o_dropzone_box</string>
               <string>o_dropzone_btn</string>
               <string>o_dropzone_lbl</string>
               <string>o_dropzone_view</string>
@@ -17264,6 +17284,7 @@ LCAuLi4</string>
               <string>id</string>
               <string>id</string>
               <string>id</string>
+              <string>id</string>
               <string>VLCFSPanel</string>
               <string>id</string>
               <string>id</string>
@@ -17314,6 +17335,7 @@ LCAuLi4</string>
               <string>o_detached_time_sld_fancygradient_view</string>
               <string>o_detached_titlebar_view</string>
               <string>o_detached_video_window</string>
+              <string>o_dropzone_box</string>
               <string>o_dropzone_btn</string>
               <string>o_dropzone_lbl</string>
               <string>o_dropzone_view</string>
@@ -17413,6 +17435,10 @@ LCAuLi4</string>
                 <string key="name">o_detached_video_window</string>
                 <string key="candidateClassName">id</string>
               </object>
+              <object class="IBToOneOutletInfo">
+                <string key="name">o_dropzone_box</string>
+                <string key="candidateClassName">id</string>
+              </object>
               <object class="IBToOneOutletInfo">
                 <string key="name">o_dropzone_btn</string>
                 <string key="candidateClassName">id</string>

modules/gui/macosx/MainWindow.h

@@ -66,6 +66,7 @@
     IBOutlet id o_dropzone_view;
     IBOutlet id o_dropzone_btn;
     IBOutlet id o_dropzone_lbl;
+    IBOutlet id o_dropzone_box;
 
     IBOutlet VLCFSPanel *o_fspanel;
     IBOutlet id o_titlebar_view;

modules/gui/macosx/MainWindow.m

@@ -633,6 +633,13 @@ static VLCMainWindow *_o_sharedInstance = nil;
     plrect = [[o_playlist_table animator] frame];
     plrect.size.height = i_lastSplitViewHeight - 19.0; // actual pl top bar height, which differs from its frame
     [[o_playlist_table animator] setFrame: plrect];
+
+    NSRect rightSplitRect;
+    rightSplitRect = [o_right_split_view frame];
+    plrect = [[o_dropzone_box animator] frame];
+    plrect.origin.x = (rightSplitRect.size.width - plrect.size.width) / 2;
+    plrect.origin.y = (rightSplitRect.size.height - plrect.size.height) / 2;
+    [[o_dropzone_box animator] setFrame: plrect];
 }
 
 - (IBAction)togglePlaylist:(id)sender
@@ -1109,6 +1116,7 @@ static VLCMainWindow *_o_sharedInstance = nil;
 
 - (void)showSplitView
 {
+    [self updateWindow];
     if (b_dark_interface)
         [self setContentMinSize:NSMakeSize( 604., 288. + [o_titlebar_view frame].size.height )];
     else
@@ -1122,7 +1130,6 @@ static VLCMainWindow *_o_sharedInstance = nil;
     [self setFrame: winrect display: YES animate: YES];
 
     [self performSelector:@selector(resizePlaylistAfterCollapse) withObject: nil afterDelay:0.75];
-    [self performSelector:@selector(updateWindow) withObject: nil afterDelay:0.3];
 
     b_splitview_removed = NO;
 }