fix middle-drag scroll

gtk no longer adds the PRESS event by default

Author: jcupitt

ChangeLog

@@ -1,6 +1,7 @@
 started 8.3.1 on 19/5/16
 - disable debug by default, thanks Benjamin
 - configure changes to help win64
+- fix middle-drag in ws and image view
 
 started 8.3.0 on 28/3/16
 - move path search stuff into _convert from _magick

src/columnview.c

@@ -1103,8 +1103,10 @@ columnview_init( Columnview *cview )
          */
         cview->title = gtk_event_box_new();
 	gtk_widget_add_events( GTK_WIDGET( cview->title ), 
-		GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
-		GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK ); 
+		GDK_POINTER_MOTION_MASK | 
+		GDK_POINTER_MOTION_HINT_MASK |
+		GDK_BUTTON_PRESS_MASK | 
+		GDK_BUTTON_RELEASE_MASK ); 
         gtk_box_pack_start( GTK_BOX( cview->vbox ), 
 		cview->title, FALSE, FALSE, 0 );
         set_tooltip( cview->title, _( "Left-drag to move, left-double-click to "

src/iimageview.c

@@ -363,8 +363,10 @@ iimageview_init( iImageview *iimageview )
 	/* Need these events in the enclosing workspaceview.
 	 */
 	gtk_widget_add_events( GTK_WIDGET( iimageview->id ), 
-		GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
-		GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK ); 
+		GDK_POINTER_MOTION_MASK | 
+		GDK_POINTER_MOTION_HINT_MASK |
+		GDK_BUTTON_PRESS_MASK | 
+		GDK_BUTTON_RELEASE_MASK ); 
 
 	iimageview->label = gtk_label_new( "" );
         gtk_misc_set_alignment( GTK_MISC( iimageview->label ), 0, 0.5 );

src/imagepresent.c

@@ -1521,9 +1521,12 @@ imagepresent_init( Imagepresent *ip )
 	 */
 	gtk_widget_add_events( GTK_WIDGET( ip->id ), 
 		GDK_KEY_PRESS_MASK | 
-		GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
-		GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
-		GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK ); 
+		GDK_POINTER_MOTION_MASK | 
+		GDK_POINTER_MOTION_HINT_MASK |
+		GDK_ENTER_NOTIFY_MASK | 
+		GDK_LEAVE_NOTIFY_MASK |
+		GDK_BUTTON_PRESS_MASK | 
+		GDK_BUTTON_RELEASE_MASK ); 
 	gtk_signal_connect_after( GTK_OBJECT( ip->id ), "event",
 		GTK_SIGNAL_FUNC( imagepresent_event_cb ), ip );
 	gtk_signal_connect( GTK_OBJECT( ip ), "key_press_event",

src/workspaceview.c

@@ -1121,8 +1121,10 @@ workspaceview_init( Workspaceview *wview )
 	 */
 	wview->fixed = gtk_fixed_new();
 	gtk_widget_add_events( GTK_WIDGET( wview->fixed ), 
-		GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
-		GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK ); 
+		GDK_POINTER_MOTION_MASK | 
+		GDK_POINTER_MOTION_HINT_MASK |
+		GDK_BUTTON_PRESS_MASK | 
+		GDK_BUTTON_RELEASE_MASK ); 
 	gtk_fixed_set_has_window( GTK_FIXED( wview->fixed ), TRUE );
 	wview->window = gtk_scrolled_window_new( NULL, NULL );
 	gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW( wview->window ), 
@@ -1139,7 +1141,9 @@ workspaceview_init( Workspaceview *wview )
         gtk_signal_connect( GTK_OBJECT( wview->fixed ), "event",
                 GTK_SIGNAL_FUNC( workspaceview_fixed_event_cb ), wview );
 	gtk_widget_add_events( GTK_WIDGET( wview->fixed ), 
-		GDK_BUTTON_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
+		GDK_BUTTON_MOTION_MASK | 
+		GDK_POINTER_MOTION_HINT_MASK |
+		GDK_BUTTON_PRESS_MASK |
 		GDK_BUTTON_RELEASE_MASK ); 
 
 	hadj = gtk_scrolled_window_get_hadjustment(