Grease Pencil for Nodes Editor:

This commit restores Grease Pencil functionality for the Nodes Editor. Grease Pencil data is now stored at the NodeTree level, which means that annotations remain with the NodeTree they were made for. 

Possible TODO's:
* In future, it may be worth investigating attaching Grease Pencil data to individual nodes, to allow annotations to stay attached to nodes as they are moved
* Include the settings for the 'active node' in a panel in the new NKEY region where the Grease Pencil buttons appear.

1 files changed, 138 insertions, 0 deletions

diff --git a/source/blender/editors/space_node/node_buttons.c b/source/blender/editors/space_node/node_buttons.c
new file mode 100644
index 00000000000..63361f2be66
--- /dev/null
+++ b/source/blender/editors/space_node/node_buttons.c
@@ -0,0 +1,138 @@
+/**
+ * $Id:
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version. 
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2009 Blender Foundation.
+ * All rights reserved.
+ *
+ * 
+ * Contributor(s): Blender Foundation
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <math.h>
+#include <float.h>
+
+#include "DNA_ID.h"
+#include "DNA_gpencil_types.h"
+#include "DNA_node_types.h"
+#include "DNA_space_types.h"
+#include "DNA_scene_types.h"
+#include "DNA_screen_types.h"
+#include "DNA_userdef_types.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_math.h"
+#include "BLI_blenlib.h"
+#include "BLI_rand.h"
+
+#include "BKE_context.h"
+#include "BKE_depsgraph.h"
+#include "BKE_idprop.h"
+#include "BKE_object.h"
+#include "BKE_global.h"
+#include "BKE_scene.h"
+#include "BKE_screen.h"
+#include "BKE_utildefines.h"
+
+#include "BIF_gl.h"
+
+#include "WM_api.h"
+#include "WM_types.h"
+
+#include "RNA_access.h"
+#include "RNA_define.h"
+
+#include "ED_gpencil.h"
+#include "ED_screen.h"
+#include "ED_types.h"
+#include "ED_util.h"
+
+#include "UI_interface.h"
+#include "UI_resources.h"
+#include "UI_view2d.h"
+
+#include "node_intern.h"	// own include
+
+
+/* ******************* node space & buttons ************** */
+#define B_NOP		1
+#define B_REDR		2
+
+#if 0 // XXX not used...
+static void do_node_region_buttons(bContext *C, void *arg, int event)
+{
+	//SpaceNode *snode= CTX_wm_space_node(C);
+	
+	switch(event) {
+	case B_REDR:
+		ED_area_tag_redraw(CTX_wm_area(C));
+		return; /* no notifier! */
+	}
+}
+#endif
+
+/* ******************* node buttons registration ************** */
+
+void node_buttons_register(ARegionType *art)
+{
+	PanelType *pt;
+	
+	// XXX active node
+	
+	pt= MEM_callocN(sizeof(PanelType), "spacetype node panel gpencil");
+	strcpy(pt->idname, "NODE_PT_gpencil");
+	strcpy(pt->label, "Grease Pencil");
+	pt->draw= gpencil_panel_standard;
+	BLI_addtail(&art->paneltypes, pt);
+}
+
+static int node_properties(bContext *C, wmOperator *op)
+{
+	ScrArea *sa= CTX_wm_area(C);
+	ARegion *ar= node_has_buttons_region(sa);
+	
+	if(ar)
+		ED_region_toggle_hidden(C, ar);
+
+	return OPERATOR_FINISHED;
+}
+
+/* non-standard poll operator which doesn't care if there are any nodes */
+static int node_properties_poll(bContext *C)
+{
+	ScrArea *sa= CTX_wm_area(C);
+	return (sa && (sa->spacetype == SPACE_NODE));
+}
+
+void NODE_OT_properties(wmOperatorType *ot)
+{
+	ot->name= "Properties";
+	ot->description= "Toggles the properties panel display.";
+	ot->idname= "NODE_OT_properties";
+	
+	ot->exec= node_properties;
+	ot->poll= node_properties_poll;
+	
+	/* flags */
+	ot->flag= 0;
+}