Fix Mac standalone window focus

cmake/DPF-plugin.cmake

@@ -347,6 +347,10 @@ function(dpf__add_dgl_cairo)
     "${DPF_ROOT_DIR}/dgl/src/Window.cpp"
     "${DPF_ROOT_DIR}/dgl/src/WindowPrivateData.cpp"
     "${DPF_ROOT_DIR}/dgl/src/Cairo.cpp")
+  if(APPLE)
+    target_sources(dgl-cairo STATIC
+      "${DPF_ROOT_DIR}/dgl/src/ApplicationPrivateData_macOS.mm")
+  endif()
   if(NOT APPLE)
     target_sources(dgl-cairo PRIVATE
       "${DPF_ROOT_DIR}/dgl/src/pugl.cpp")
@@ -409,6 +413,10 @@ function(dpf__add_dgl_opengl)
     "${DPF_ROOT_DIR}/dgl/src/WindowPrivateData.cpp"
     "${DPF_ROOT_DIR}/dgl/src/OpenGL.cpp"
     "${DPF_ROOT_DIR}/dgl/src/NanoVG.cpp")
+  if(APPLE)
+    target_sources(dgl-opengl STATIC
+      "${DPF_ROOT_DIR}/dgl/src/ApplicationPrivateData_macOS.mm")
+  endif()
   if(NOT APPLE)
     target_sources(dgl-opengl PRIVATE
       "${DPF_ROOT_DIR}/dgl/src/pugl.cpp")

dgl/Makefile

@@ -41,6 +41,10 @@ OBJS_common = \
 	../build/dgl/Window.cpp.o \
 	../build/dgl/WindowPrivateData.cpp.o
 
+ifeq ($(MACOS),true)
+OBJS_common += ../build/dgl/ApplicationPrivateData_macOS.mm.o
+endif
+
 # ---------------------------------------------------------------------------------------------------------------------
 
 OBJS_cairo = $(OBJS_common) \

dgl/src/ApplicationPrivateData.cpp

@@ -64,6 +64,12 @@ Application::PrivateData::PrivateData(const bool standalone)
 #ifdef HAVE_X11
     sofdFileDialogSetup(world);
 #endif
+
+#ifdef DISTRHO_OS_MAC
+    if (standalone) {
+        macActivateApp();
+    }
+#endif
 }
 
 Application::PrivateData::~PrivateData()

dgl/src/ApplicationPrivateData.hpp

@@ -34,6 +34,10 @@ typedef struct PuglWorldImpl PuglWorld;
 
 START_NAMESPACE_DGL
 
+#ifdef DISTRHO_OS_MAC
+void macActivateApp();
+#endif
+
 class Window;
 
 // --------------------------------------------------------------------------------------------------------------------

dgl/src/ApplicationPrivateData_macOS.mm

@@ -0,0 +1,29 @@
+/*
+ * DISTRHO Plugin Framework (DPF)
+ * Copyright (C) 2012-2021 Filipe Coelho <falktx@falktx.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any purpose with
+ * or without fee is hereby granted, provided that the above copyright notice and this
+ * permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
+ * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#import <AppKit/AppKit.h>
+
+#include "ApplicationPrivateData.hpp"
+
+START_NAMESPACE_DGL
+
+void macActivateApp()
+{
+    [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
+    [NSApp activateIgnoringOtherApps:YES]; // focus window
+}
+
+END_NAMESPACE_DGL