Merge of the PyNodes branch (aka "custom nodes") into trunk.

PyNodes opens up the node system in Blender to scripters and adds a number of UI-level improvements.

=== Dynamic node type registration ===
Node types can now be added at runtime, using the RNA registration mechanism from python. This enables addons such as render engines to create a complete user interface with nodes.

Examples of how such nodes can be defined can be found in my personal wiki docs atm [1] and as a script template in release/scripts/templates_py/custom_nodes.py [2].

=== Node group improvements ===
Each node editor now has a tree history of edited node groups, which allows opening and editing nested node groups. The node editor also supports pinning now, so that different spaces can be used to edit different node groups simultaneously. For more ramblings and rationale see (really old) blog post on code.blender.org [3].

The interface of node groups has been overhauled. Sockets of a node group are no longer displayed in columns on either side, but instead special input/output nodes are used to mirror group sockets inside a node tree. This solves the problem of long node lines in groups and allows more adaptable node layout. Internal sockets can be exposed from a group by either connecting to the extension sockets in input/output nodes (shown as empty circle) or by adding sockets from the node property bar in the "Interface" panel. Further details such as the socket name can also be changed there.

[1] http://wiki.blender.org/index.php/User:Phonybone/Python_Nodes
[2] http://projects.blender.org/scm/viewvc.php/trunk/blender/release/scripts/templates_py/custom_nodes.py?view=markup&root=bf-blender
[3] http://code.blender.org/index.php/2012/01/improving-node-group-interface-editing/

1 files changed, 64 insertions, 0 deletions

diff --git a/source/blender/editors/interface/interface_templates.c b/source/blender/editors/interface/interface_templates.c
index eeddd8c7a9a..ee2625cf94b 100644
--- a/source/blender/editors/interface/interface_templates.c
+++ b/source/blender/editors/interface/interface_templates.c
@@ -32,6 +32,7 @@
 #include "MEM_guardedalloc.h"
 
 #include "DNA_dynamicpaint_types.h"
+#include "DNA_node_types.h"
 #include "DNA_scene_types.h"
 #include "DNA_object_types.h"
 #include "DNA_object_force.h"
@@ -57,6 +58,7 @@
 #include "BKE_main.h"
 #include "BKE_material.h"
 #include "BKE_modifier.h"
+#include "BKE_node.h"
 #include "BKE_object.h"
 #include "BKE_packedFile.h"
 #include "BKE_particle.h"
@@ -3064,3 +3066,65 @@ void uiTemplateColormanagedViewSettings(uiLayout *layout, bContext *UNUSED(C), P
 	if (view_settings->flag & COLORMANAGE_VIEW_USE_CURVES)
 		uiTemplateCurveMapping(col, &view_transform_ptr, "curve_mapping", 'c', TRUE, 0);
 }
+
+/********************************* Component Menu *************************************/
+
+typedef struct ComponentMenuArgs {
+	PointerRNA ptr;
+	char propname[64];	/* XXX arbitrary */
+} ComponentMenuArgs;
+/* NOTE: this is a block-menu, needs 0 events, otherwise the menu closes */
+static uiBlock *component_menu(bContext *C, ARegion *ar, void *args_v)
+{
+	ComponentMenuArgs *args = (ComponentMenuArgs*)args_v;
+	uiBlock *block;
+	uiLayout *layout;
+	
+	block = uiBeginBlock(C, ar, __func__, UI_EMBOSS);
+	uiBlockSetFlag(block, UI_BLOCK_KEEP_OPEN);
+	
+	layout = uiLayoutColumn(uiBlockLayout(block, UI_LAYOUT_VERTICAL, UI_LAYOUT_PANEL, 0, 0, UI_UNIT_X * 6, UI_UNIT_Y, UI_GetStyle()), 0);
+	
+	uiItemR(layout, &args->ptr, args->propname, UI_ITEM_R_EXPAND, "", ICON_NONE);
+	
+	uiBoundsBlock(block, 6);
+	uiBlockSetDirection(block, UI_DOWN);	
+	uiEndBlock(C, block);
+	
+	return block;
+}
+void uiTemplateComponentMenu(uiLayout *layout, PointerRNA *ptr, const char *propname, const char *name)
+{
+	ComponentMenuArgs *args = MEM_callocN(sizeof(ComponentMenuArgs), "component menu template args");
+	uiBlock *block;
+	
+	args->ptr = *ptr;
+	BLI_strncpy(args->propname, propname, sizeof(args->propname));
+	
+	block = uiLayoutGetBlock(layout);
+	uiBlockBeginAlign(block);
+
+	uiDefBlockButN(block, component_menu, args, name, 0, 0, UI_UNIT_X * 6, UI_UNIT_Y, "");
+	
+	uiBlockEndAlign(block);
+}
+
+/************************* Node Socket Icon **************************/
+
+void uiTemplateNodeSocket(uiLayout *layout, bContext *UNUSED(C), float *color)
+{
+	uiBlock *block;
+	uiBut *but;
+	
+	block = uiLayoutGetBlock(layout);
+	uiBlockBeginAlign(block);
+	
+	/* XXX using explicit socket colors is not quite ideal.
+	 * Eventually it should be possible to use theme colors for this purpose,
+	 * but this requires a better design for extendable color palettes in user prefs.
+	 */
+	but = uiDefBut(block, NODESOCKET, 0, "", 0, 0, UI_UNIT_X, UI_UNIT_Y, NULL, 0, 0, 0, 0, "");
+	rgba_float_to_uchar(but->col, color);
+	
+	uiBlockEndAlign(block);
+}