space_view3d.c

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/*
 * $Id: space_view3d.c 37327 2011-06-09 03:56:32Z campbellbarton $
 *
 * ***** 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2008 Blender Foundation.
 * All rights reserved.
 *
 * 
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <string.h>
#include <stdio.h>

#include "DNA_object_types.h"
#include "DNA_scene_types.h"

#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_rand.h"
#include "BLI_utildefines.h"

#include "BKE_object.h"
#include "BKE_context.h"
#include "BKE_screen.h"

#include "ED_space_api.h"
#include "ED_screen.h"
#include "ED_object.h"

#include "BIF_gl.h"


#include "WM_api.h"
#include "WM_types.h"


#include "RNA_access.h"

#include "UI_resources.h"

#include "view3d_intern.h"      // own include

/* ******************** manage regions ********************* */

ARegion *view3d_has_buttons_region(ScrArea *sa)
{
        ARegion *ar, *arnew;

        ar= BKE_area_find_region_type(sa, RGN_TYPE_UI);
        if(ar) return ar;
        
        /* add subdiv level; after header */
        ar= BKE_area_find_region_type(sa, RGN_TYPE_HEADER);

        /* is error! */
        if(ar==NULL) return NULL;
        
        arnew= MEM_callocN(sizeof(ARegion), "buttons for view3d");
        
        BLI_insertlinkafter(&sa->regionbase, ar, arnew);
        arnew->regiontype= RGN_TYPE_UI;
        arnew->alignment= RGN_ALIGN_RIGHT;
        
        arnew->flag = RGN_FLAG_HIDDEN;
        
        return arnew;
}

ARegion *view3d_has_tools_region(ScrArea *sa)
{
        ARegion *ar, *artool=NULL, *arprops=NULL, *arhead;
        
        for(ar= sa->regionbase.first; ar; ar= ar->next) {
                if(ar->regiontype==RGN_TYPE_TOOLS)
                        artool= ar;
                if(ar->regiontype==RGN_TYPE_TOOL_PROPS)
                        arprops= ar;
        }
        
        /* tool region hide/unhide also hides props */
        if(arprops && artool) return artool;
        
        if(artool==NULL) {
                /* add subdiv level; after header */
                for(arhead= sa->regionbase.first; arhead; arhead= arhead->next)
                        if(arhead->regiontype==RGN_TYPE_HEADER)
                                break;
                
                /* is error! */
                if(arhead==NULL) return NULL;
                
                artool= MEM_callocN(sizeof(ARegion), "tools for view3d");
                
                BLI_insertlinkafter(&sa->regionbase, arhead, artool);
                artool->regiontype= RGN_TYPE_TOOLS;
                artool->alignment= RGN_ALIGN_LEFT; //RGN_OVERLAP_LEFT;
                artool->flag = RGN_FLAG_HIDDEN;
        }

        if(arprops==NULL) {
                /* add extra subdivided region for tool properties */
                arprops= MEM_callocN(sizeof(ARegion), "tool props for view3d");
                
                BLI_insertlinkafter(&sa->regionbase, artool, arprops);
                arprops->regiontype= RGN_TYPE_TOOL_PROPS;
                arprops->alignment= RGN_ALIGN_BOTTOM|RGN_SPLIT_PREV;
        }
        
        return artool;
}

/* ****************************************************** */

/* function to always find a regionview3d context inside 3D window */
RegionView3D *ED_view3d_context_rv3d(bContext *C)
{
        RegionView3D *rv3d= CTX_wm_region_view3d(C);
        
        if(rv3d==NULL) {
                ScrArea *sa =CTX_wm_area(C);
                if(sa && sa->spacetype==SPACE_VIEW3D) {
                        ARegion *ar= BKE_area_find_region_type(sa, RGN_TYPE_WINDOW);
                        if(ar) {
                                rv3d= ar->regiondata;
                        }
                }
        }
        return rv3d;
}

/* ideally would return an rv3d but in some cases the region is needed too
 * so return that, the caller can then access the ar->regiondata */
ARegion *ED_view3d_context_region_unlock(bContext *C)
{
        ScrArea *sa= CTX_wm_area(C);
        if(sa && sa->spacetype==SPACE_VIEW3D) {
                ARegion *ar= CTX_wm_region(C);
                if(ar) {
                        RegionView3D *rv3d= ar->regiondata;
                        if(rv3d && rv3d->viewlock == 0) {
                                return ar;
                        }
                        else {
                                ARegion *ar_unlock_user= NULL;
                                ARegion *ar_unlock= NULL;
                                for(ar= sa->regionbase.first; ar; ar= ar->next) {
                                        /* find the first unlocked rv3d */
                                        if(ar->regiondata && ar->regiontype == RGN_TYPE_WINDOW) {
                                                rv3d= ar->regiondata;
                                                if(rv3d->viewlock == 0) {
                                                        ar_unlock= ar;
                                                        if(rv3d->persp==RV3D_PERSP || rv3d->persp==RV3D_CAMOB) {
                                                                ar_unlock_user= ar;
                                                                break;
                                                        }
                                                } 
                                        }
                                }

                                /* camera/perspective view get priority when the active region is locked */
                                if(ar_unlock_user) return ar_unlock_user;
                                if(ar_unlock) return ar_unlock;
                        }
                }
        }
        return NULL;
}

/* Most of the time this isn't needed since you could assume the view matrix was
 * set while drawing, however when functions like mesh_foreachScreenVert are
 * called by selection tools, we can't be sure this object was the last.
 *
 * for example, transparent objects are drawn after editmode and will cause
 * the rv3d mat's to change and break selection.
 *
 * 'ED_view3d_init_mats_rv3d' should be called before
 * view3d_project_short_clip and view3d_project_short_noclip in cases where
 * these functions are not used during draw_object
 */
void ED_view3d_init_mats_rv3d(struct Object *ob, struct RegionView3D *rv3d)
{
        /* local viewmat and persmat, to calculate projections */
        mul_m4_m4m4(rv3d->viewmatob, ob->obmat, rv3d->viewmat);
        mul_m4_m4m4(rv3d->persmatob, ob->obmat, rv3d->persmat);

        /* initializes object space clipping, speeds up clip tests */
        ED_view3d_local_clipping(rv3d, ob->obmat);
}

void ED_view3d_init_mats_rv3d_gl(struct Object *ob, struct RegionView3D *rv3d)
{
        ED_view3d_init_mats_rv3d(ob, rv3d);

        /* we have to multiply instead of loading viewmatob to make
           it work with duplis using displists, otherwise it will
           override the dupli-matrix */
        glMultMatrixf(ob->obmat);
}

/* ******************** default callbacks for view3d space ***************** */

static SpaceLink *view3d_new(const bContext *C)
{
        Scene *scene= CTX_data_scene(C);
        ARegion *ar;
        View3D *v3d;
        RegionView3D *rv3d;
        
        v3d= MEM_callocN(sizeof(View3D), "initview3d");
        v3d->spacetype= SPACE_VIEW3D;
        v3d->blockscale= 0.7f;
        v3d->lay= v3d->layact= 1;
        if(scene) {
                v3d->lay= v3d->layact= scene->lay;
                v3d->camera= scene->camera;
        }
        v3d->scenelock= TRUE;
        v3d->grid= 1.0f;
        v3d->gridlines= 16;
        v3d->gridsubdiv = 10;
        v3d->drawtype= OB_SOLID;
        
        v3d->gridflag |= V3D_SHOW_X;
        v3d->gridflag |= V3D_SHOW_Y;
        v3d->gridflag |= V3D_SHOW_FLOOR;
        v3d->gridflag &= ~V3D_SHOW_Z;
        
        v3d->flag |= V3D_SELECT_OUTLINE;
        
        v3d->lens= 35.0f;
        v3d->near= 0.01f;
        v3d->far= 1000.0f;

        v3d->twflag |= U.tw_flag & V3D_USE_MANIPULATOR;
        v3d->twtype= V3D_MANIP_TRANSLATE;
        v3d->around= V3D_CENTROID;
        
        /* header */
        ar= MEM_callocN(sizeof(ARegion), "header for view3d");
        
        BLI_addtail(&v3d->regionbase, ar);
        ar->regiontype= RGN_TYPE_HEADER;
        ar->alignment= RGN_ALIGN_BOTTOM;
        
        /* tool shelf */
        ar= MEM_callocN(sizeof(ARegion), "toolshelf for view3d");
        
        BLI_addtail(&v3d->regionbase, ar);
        ar->regiontype= RGN_TYPE_TOOLS;
        ar->alignment= RGN_ALIGN_LEFT;
        ar->flag = RGN_FLAG_HIDDEN;
        
        /* tool properties */
        ar= MEM_callocN(sizeof(ARegion), "tool properties for view3d");
        
        BLI_addtail(&v3d->regionbase, ar);
        ar->regiontype= RGN_TYPE_TOOL_PROPS;
        ar->alignment= RGN_ALIGN_BOTTOM|RGN_SPLIT_PREV;
        ar->flag = RGN_FLAG_HIDDEN;
        
        /* buttons/list view */
        ar= MEM_callocN(sizeof(ARegion), "buttons for view3d");
        
        BLI_addtail(&v3d->regionbase, ar);
        ar->regiontype= RGN_TYPE_UI;
        ar->alignment= RGN_ALIGN_RIGHT;
        ar->flag = RGN_FLAG_HIDDEN;
        
        /* main area */
        ar= MEM_callocN(sizeof(ARegion), "main area for view3d");
        
        BLI_addtail(&v3d->regionbase, ar);
        ar->regiontype= RGN_TYPE_WINDOW;
        
        ar->regiondata= MEM_callocN(sizeof(RegionView3D), "region view3d");
        rv3d= ar->regiondata;
        rv3d->viewquat[0]= 1.0f;
        rv3d->persp= RV3D_PERSP;
        rv3d->view= RV3D_VIEW_PERSPORTHO;
        rv3d->dist= 10.0;
        
        return (SpaceLink *)v3d;
}

/* not spacelink itself */
static void view3d_free(SpaceLink *sl)
{
        View3D *vd= (View3D *) sl;

        BGpic *bgpic;
        for(bgpic= vd->bgpicbase.first; bgpic; bgpic= bgpic->next) {
                if(bgpic->ima) bgpic->ima->id.us--;
        }
        BLI_freelistN(&vd->bgpicbase);

        if(vd->localvd) MEM_freeN(vd->localvd);
        
        if(vd->properties_storage) MEM_freeN(vd->properties_storage);
}


/* spacetype; init callback */
static void view3d_init(struct wmWindowManager *UNUSED(wm), ScrArea *UNUSED(sa))
{

}

static SpaceLink *view3d_duplicate(SpaceLink *sl)
{
        View3D *v3do= (View3D *)sl;
        View3D *v3dn= MEM_dupallocN(sl);
        BGpic *bgpic;
        
        /* clear or remove stuff from old */
        
// XXX  BIF_view3d_previewrender_free(v3do);
        
        if(v3do->localvd) {
                v3do->localvd= NULL;
                v3do->properties_storage= NULL;
                v3do->lay= v3dn->localvd->lay;
                v3do->lay &= 0xFFFFFF;
        }
        
        /* copy or clear inside new stuff */

        BLI_duplicatelist(&v3dn->bgpicbase, &v3do->bgpicbase);
        for(bgpic= v3dn->bgpicbase.first; bgpic; bgpic= bgpic->next)
                if(bgpic->ima)
                        bgpic->ima->id.us++;

        v3dn->properties_storage= NULL;
        
        return (SpaceLink *)v3dn;
}

/* add handlers, stuff you only do once or on area/region changes */
static void view3d_main_area_init(wmWindowManager *wm, ARegion *ar)
{
        ListBase *lb;
        wmKeyMap *keymap;

        /* object ops. */
        
        /* important to be before Pose keymap since they can both be enabled at once */
        keymap= WM_keymap_find(wm->defaultconf, "Face Mask", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
        
        /* pose is not modal, operator poll checks for this */
        keymap= WM_keymap_find(wm->defaultconf, "Pose", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
        
        keymap= WM_keymap_find(wm->defaultconf, "Object Mode", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Image Paint", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Vertex Paint", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Weight Paint", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Sculpt", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
        
        keymap= WM_keymap_find(wm->defaultconf, "Mesh", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
        
        keymap= WM_keymap_find(wm->defaultconf, "Curve", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
        
        keymap= WM_keymap_find(wm->defaultconf, "Armature", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Pose", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Metaball", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
        
        keymap= WM_keymap_find(wm->defaultconf, "Lattice", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        /* armature sketching needs to take over mouse */
        keymap= WM_keymap_find(wm->defaultconf, "Armature Sketch", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Particle", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        /* editfont keymap swallows all... */
        keymap= WM_keymap_find(wm->defaultconf, "Font", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Object Non-modal", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "Frames", 0, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        /* own keymap, last so modes can override it */
        keymap= WM_keymap_find(wm->defaultconf, "3D View Generic", SPACE_VIEW3D, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        keymap= WM_keymap_find(wm->defaultconf, "3D View", SPACE_VIEW3D, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
        
        /* add drop boxes */
        lb= WM_dropboxmap_find("View3D", SPACE_VIEW3D, RGN_TYPE_WINDOW);
        
        WM_event_add_dropbox_handler(&ar->handlers, lb);
        
}

static int view3d_ob_drop_poll(bContext *UNUSED(C), wmDrag *drag, wmEvent *UNUSED(event))
{
        if(drag->type==WM_DRAG_ID) {
                ID *id= (ID *)drag->poin;
                if( GS(id->name)==ID_OB )
                        return 1;
        }
        return 0;
}

static int view3d_mat_drop_poll(bContext *UNUSED(C), wmDrag *drag, wmEvent *UNUSED(event))
{
        if(drag->type==WM_DRAG_ID) {
                ID *id= (ID *)drag->poin;
                if( GS(id->name)==ID_MA )
                        return 1;
        }
        return 0;
}

static int view3d_ima_drop_poll(bContext *UNUSED(C), wmDrag *drag, wmEvent *UNUSED(event))
{
        if(drag->type==WM_DRAG_ID) {
                ID *id= (ID *)drag->poin;
                if( GS(id->name)==ID_IM )
                        return 1;
        }
        else if(drag->type==WM_DRAG_PATH){
                if(ELEM(drag->icon, 0, ICON_FILE_IMAGE))        /* rule might not work? */
                        return 1;
        }
        return 0;
}


static int view3d_ima_bg_drop_poll(bContext *C, wmDrag *drag, wmEvent *event)
{
        if( ED_view3d_give_base_under_cursor(C, event->mval) ) {
                return 0;
        }
        return view3d_ima_drop_poll(C, drag, event);
}

static int view3d_ima_ob_drop_poll(bContext *C, wmDrag *drag, wmEvent *event)
{
        if( ED_view3d_give_base_under_cursor(C, event->mval) ) {
                return view3d_ima_drop_poll(C, drag, event);
        }
        return 0;
}

static void view3d_ob_drop_copy(wmDrag *drag, wmDropBox *drop)
{
        ID *id= (ID *)drag->poin;
        PointerRNA ptr;

        /* need to put name in sub-operator in macro */
        ptr= RNA_pointer_get(drop->ptr, "OBJECT_OT_add_named");
        if(ptr.data)
                RNA_string_set(&ptr, "name", id->name+2);
        else
                RNA_string_set(drop->ptr, "name", id->name+2);
}

static void view3d_id_drop_copy(wmDrag *drag, wmDropBox *drop)
{
        ID *id= (ID *)drag->poin;
        
        RNA_string_set(drop->ptr, "name", id->name+2);
}

static void view3d_id_path_drop_copy(wmDrag *drag, wmDropBox *drop)
{
        ID *id= (ID *)drag->poin;
        
        if(id)
                RNA_string_set(drop->ptr, "name", id->name+2);
        if(drag->path[0]) 
                RNA_string_set(drop->ptr, "filepath", drag->path);
}


/* region dropbox definition */
static void view3d_dropboxes(void)
{
        ListBase *lb= WM_dropboxmap_find("View3D", SPACE_VIEW3D, RGN_TYPE_WINDOW);
        
        WM_dropbox_add(lb, "OBJECT_OT_add_named_cursor", view3d_ob_drop_poll, view3d_ob_drop_copy);
        WM_dropbox_add(lb, "OBJECT_OT_drop_named_material", view3d_mat_drop_poll, view3d_id_drop_copy);
        WM_dropbox_add(lb, "MESH_OT_drop_named_image", view3d_ima_ob_drop_poll, view3d_id_path_drop_copy);
        WM_dropbox_add(lb, "VIEW3D_OT_background_image_add", view3d_ima_bg_drop_poll, view3d_id_path_drop_copy);
}



/* type callback, not region itself */
static void view3d_main_area_free(ARegion *ar)
{
        RegionView3D *rv3d= ar->regiondata;
        
        if(rv3d) {
                if(rv3d->localvd) MEM_freeN(rv3d->localvd);
                if(rv3d->clipbb) MEM_freeN(rv3d->clipbb);

                // XXX  retopo_free_view_data(rv3d);
                if(rv3d->ri) { 
                        // XXX          BIF_view3d_previewrender_free(rv3d);
                }
                
                if(rv3d->depths) {
                        if(rv3d->depths->depths) MEM_freeN(rv3d->depths->depths);
                        MEM_freeN(rv3d->depths);
                }
                MEM_freeN(rv3d);
                ar->regiondata= NULL;
        }
}

/* copy regiondata */
static void *view3d_main_area_duplicate(void *poin)
{
        if(poin) {
                RegionView3D *rv3d= poin, *new;
        
                new= MEM_dupallocN(rv3d);
                if(rv3d->localvd) 
                        new->localvd= MEM_dupallocN(rv3d->localvd);
                if(rv3d->clipbb) 
                        new->clipbb= MEM_dupallocN(rv3d->clipbb);
                
                new->depths= NULL;
                new->ri= NULL;
                new->gpd= NULL;
                new->sms= NULL;
                new->smooth_timer= NULL;
                
                return new;
        }
        return NULL;
}

static void view3d_recalc_used_layers(ARegion *ar, wmNotifier *wmn, Scene *scene)
{
        wmWindow *win= wmn->wm->winactive;
        ScrArea *sa;
        unsigned int lay_used= 0;
        Base *base;

        if (!win) return;

        base= scene->base.first;
        while(base) {
                lay_used |= base->lay & ((1<<20)-1); /* ignore localview */

                if (lay_used == (1<<20)-1)
                        break;

                base= base->next;
        }

        for(sa= win->screen->areabase.first; sa; sa= sa->next) {
                if(sa->spacetype == SPACE_VIEW3D) {
                        if(BLI_findindex(&sa->regionbase, ar) != -1) {
                                View3D *v3d= sa->spacedata.first;
                                v3d->lay_used= lay_used;
                                break;
                        }
                }
        }
}

static void view3d_main_area_listener(ARegion *ar, wmNotifier *wmn)
{
        bScreen *sc;

        /* context changes */
        switch(wmn->category) {
                case NC_ANIMATION:
                        switch(wmn->data) {
                                case ND_KEYFRAME_PROP:
                                case ND_NLA_ACTCHANGE:
                                        ED_region_tag_redraw(ar);
                                        break;
                                case ND_NLA:
                                case ND_KEYFRAME:
                                        if (wmn->action == NA_EDITED)
                                                ED_region_tag_redraw(ar);
                                        break;
                                case ND_ANIMCHAN:
                                        if (wmn->action == NA_SELECTED)
                                                ED_region_tag_redraw(ar);
                                        break;
                        }
                        break;
                case NC_SCENE:
                        switch(wmn->data) {
                                case ND_LAYER_CONTENT:
                                        view3d_recalc_used_layers(ar, wmn, wmn->reference);
                                        ED_region_tag_redraw(ar);
                                        break;
                                case ND_FRAME:
                                case ND_TRANSFORM:
                                case ND_OB_ACTIVE:
                                case ND_OB_SELECT:
                                case ND_OB_VISIBLE:
                                case ND_LAYER:
                                case ND_RENDER_OPTIONS:
                                case ND_MODE:
                                        ED_region_tag_redraw(ar);
                                        break;
                                case ND_WORLD:
                                        /* handled by space_view3d_listener() for v3d access */
                                        break;
                        }
                        if (wmn->action == NA_EDITED)
                                ED_region_tag_redraw(ar);
                        break;
                case NC_OBJECT:
                        switch(wmn->data) {
                                case ND_BONE_ACTIVE:
                                case ND_BONE_SELECT:
                                case ND_TRANSFORM:
                                case ND_POSE:
                                case ND_DRAW:
                                case ND_MODIFIER:
                                case ND_CONSTRAINT:
                                case ND_KEYS:
                                case ND_PARTICLE:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        switch(wmn->action) {
                                case NA_ADDED:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        break;
                case NC_GEOM:
                        switch(wmn->data) {
                                case ND_DATA:
                                case ND_SELECT:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        switch(wmn->action) {
                                case NA_EDITED:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        break;
                case NC_GROUP:
                        /* all group ops for now */
                        ED_region_tag_redraw(ar);
                        break;
                case NC_BRUSH:
                        if(wmn->action == NA_EDITED)
                                ED_region_tag_redraw_overlay(ar);
                        break;                  
                case NC_MATERIAL:
                        switch(wmn->data) {
                                case ND_SHADING_DRAW:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        break;
                case NC_WORLD:
                        switch(wmn->data) {
                                case ND_WORLD_DRAW:
                                        /* handled by space_view3d_listener() for v3d access */
                                        break;
                                case ND_WORLD_STARS:
                                {
                                        RegionView3D *rv3d= ar->regiondata;
                                        if(rv3d->persp == RV3D_CAMOB) {
                                                ED_region_tag_redraw(ar);
                                        }
                                }
                        }
                        break;
                case NC_LAMP:
                        switch(wmn->data) {
                                case ND_LIGHTING_DRAW:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        break;
                case NC_IMAGE:  
                        /* this could be more fine grained checks if we had
                         * more context than just the region */
                        ED_region_tag_redraw(ar);
                        break;
                case NC_TEXTURE:        
                        /* same as above */
                        ED_region_tag_redraw(ar);
                        break;
                case NC_SPACE:
                        if(wmn->data == ND_SPACE_VIEW3D) {
                                if (wmn->subtype == NS_VIEW3D_GPU) {
                                        RegionView3D *rv3d= ar->regiondata;
                                        rv3d->rflag |= RV3D_GPULIGHT_UPDATE;
                                }
                                ED_region_tag_redraw(ar);
                        }
                        break;
                case NC_ID:
                        if(wmn->action == NA_RENAME)
                                ED_region_tag_redraw(ar);
                        break;
                case NC_SCREEN:
                        switch(wmn->data) {
                                case ND_GPENCIL:
                                case ND_ANIMPLAY:
                                case ND_SKETCH:
                                        ED_region_tag_redraw(ar);
                                        break;
                                case ND_SCREENBROWSE:
                                case ND_SCREENDELETE:
                                case ND_SCREENSET:
                                        /* screen was changed, need to update used layers due to NC_SCENE|ND_LAYER_CONTENT */
                                        /* updates used layers only for View3D in active screen */
                                        sc= wmn->reference;
                                        view3d_recalc_used_layers(ar, wmn, sc->scene);
                                        ED_region_tag_redraw(ar);
                                        break;
                        }

                        break;
        }
}

/* concept is to retrieve cursor type context-less */
static void view3d_main_area_cursor(wmWindow *win, ScrArea *UNUSED(sa), ARegion *UNUSED(ar))
{
        Scene *scene= win->screen->scene;

        if(scene->obedit) {
                WM_cursor_set(win, CURSOR_EDIT);
        }
        else {
                WM_cursor_set(win, CURSOR_STD);
        }
}

/* add handlers, stuff you only do once or on area/region changes */
static void view3d_header_area_init(wmWindowManager *wm, ARegion *ar)
{
        wmKeyMap *keymap= WM_keymap_find(wm->defaultconf, "3D View Generic", SPACE_VIEW3D, 0);
        
        WM_event_add_keymap_handler(&ar->handlers, keymap);

        ED_region_header_init(ar);
}

static void view3d_header_area_draw(const bContext *C, ARegion *ar)
{
        ED_region_header(C, ar);
}

static void view3d_header_area_listener(ARegion *ar, wmNotifier *wmn)
{
        /* context changes */
        switch(wmn->category) {
                case NC_SCENE:
                        switch(wmn->data) {
                                case ND_FRAME:
                                case ND_OB_ACTIVE:
                                case ND_OB_SELECT:
                                case ND_OB_VISIBLE:
                                case ND_MODE:
                                case ND_LAYER:
                                case ND_TOOLSETTINGS:
                                case ND_LAYER_CONTENT:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        break;
                case NC_SPACE:
                        if(wmn->data == ND_SPACE_VIEW3D)
                                ED_region_tag_redraw(ar);
                        break;
        }
}

/* add handlers, stuff you only do once or on area/region changes */
static void view3d_buttons_area_init(wmWindowManager *wm, ARegion *ar)
{
        wmKeyMap *keymap;

        ED_region_panels_init(wm, ar);
        
        keymap= WM_keymap_find(wm->defaultconf, "3D View Generic", SPACE_VIEW3D, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
}

static void view3d_buttons_area_draw(const bContext *C, ARegion *ar)
{
        ED_region_panels(C, ar, 1, NULL, -1);
}

static void view3d_buttons_area_listener(ARegion *ar, wmNotifier *wmn)
{
        /* context changes */
        switch(wmn->category) {
                case NC_ANIMATION:
                        switch(wmn->data) {
                                case ND_KEYFRAME_PROP:
                                case ND_NLA_ACTCHANGE:
                                        ED_region_tag_redraw(ar);
                                        break;
                                case ND_NLA:
                                case ND_KEYFRAME:
                                        if (wmn->action == NA_EDITED)
                                                ED_region_tag_redraw(ar);
                                        break;  
                        }
                        break;
                case NC_SCENE:
                        switch(wmn->data) {
                                case ND_FRAME:
                                case ND_OB_ACTIVE:
                                case ND_OB_SELECT:
                                case ND_OB_VISIBLE:
                                case ND_MODE:
                                case ND_LAYER:
                                case ND_LAYER_CONTENT:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        switch(wmn->action) {
                                case NA_EDITED:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        break;
                case NC_OBJECT:
                        switch(wmn->data) {
                                case ND_BONE_ACTIVE:
                                case ND_BONE_SELECT:
                                case ND_TRANSFORM:
                                case ND_POSE:
                                case ND_DRAW:
                                case ND_KEYS:
                                case ND_MODIFIER:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        break;
                case NC_GEOM:
                        switch(wmn->data) {
                                case ND_DATA:
                                case ND_SELECT:
                                        ED_region_tag_redraw(ar);
                                        break;
                        }
                        if (wmn->action == NA_EDITED)
                                ED_region_tag_redraw(ar);
                        break;
                case NC_TEXTURE:
                        /* for brush textures */
                        ED_region_tag_redraw(ar);
                        break;
                case NC_BRUSH:
                        if(wmn->action==NA_EDITED)
                                ED_region_tag_redraw(ar);
                        break;
                case NC_SPACE:
                        if(wmn->data == ND_SPACE_VIEW3D)
                                ED_region_tag_redraw(ar);
                        break;
                case NC_ID:
                        if(wmn->action == NA_RENAME)
                                ED_region_tag_redraw(ar);
                        break;
                case NC_SCREEN: 
                        if(wmn->data == ND_GPENCIL)
                                ED_region_tag_redraw(ar);
                        break;
        }
}

/* add handlers, stuff you only do once or on area/region changes */
static void view3d_tools_area_init(wmWindowManager *wm, ARegion *ar)
{
        wmKeyMap *keymap;
        
        ED_region_panels_init(wm, ar);

        keymap= WM_keymap_find(wm->defaultconf, "3D View Generic", SPACE_VIEW3D, 0);
        WM_event_add_keymap_handler(&ar->handlers, keymap);
}

static void view3d_tools_area_draw(const bContext *C, ARegion *ar)
{
        ED_region_panels(C, ar, 1, CTX_data_mode_string(C), -1);
}

static void view3d_props_area_listener(ARegion *ar, wmNotifier *wmn)
{
        /* context changes */
        switch(wmn->category) {
                case NC_WM:
                        if(wmn->data == ND_HISTORY)
                                ED_region_tag_redraw(ar);
                        break;
                case NC_SCENE:
                        if(wmn->data == ND_MODE)
                                ED_region_tag_redraw(ar);
                        break;
                case NC_SPACE:
                        if(wmn->data == ND_SPACE_VIEW3D)
                                ED_region_tag_redraw(ar);
                        break;
        }
}

/*area (not region) level listener*/
static void space_view3d_listener(struct ScrArea *sa, struct wmNotifier *wmn)
{
        View3D *v3d = sa->spacedata.first;

        /* context changes */
        switch(wmn->category) {
                case NC_SCENE:
                        switch(wmn->data) {
                                case ND_WORLD:
                                        if(v3d->flag2 & V3D_RENDER_OVERRIDE)
                                                ED_area_tag_redraw_regiontype(sa, RGN_TYPE_WINDOW);
                                        break;
                        }
                        break;
                case NC_WORLD:
                        switch(wmn->data) {
                                case ND_WORLD_DRAW:
                                        if(v3d->flag2 & V3D_RENDER_OVERRIDE)
                                                ED_area_tag_redraw_regiontype(sa, RGN_TYPE_WINDOW);
                                        break;
                        }
                        break;
                case NC_MATERIAL:
                        switch(wmn->data) {
                                case ND_NODES:
                                        if(v3d->drawtype == OB_TEXTURE)
                                                ED_area_tag_redraw_regiontype(sa, RGN_TYPE_WINDOW);
                                        break;
                        }
                        break;
        }

#if 0 // removed since BKE_image_user_calc_frame is now called in draw_bgpic because screen_ops doesnt call the notifier.
        if (wmn->category == NC_SCENE && wmn->data == ND_FRAME) {
                View3D *v3d = area->spacedata.first;
                BGpic *bgpic = v3d->bgpicbase.first;

                for (; bgpic; bgpic = bgpic->next) {
                        if (bgpic->ima) {
                                Scene *scene = wmn->reference;
                                BKE_image_user_calc_frame(&bgpic->iuser, scene->r.cfra, 0);
                        }
                }
        }
#endif
}

const char *view3d_context_dir[] = {
        "selected_objects", "selected_bases", "selected_editable_objects",
        "selected_editable_bases", "visible_objects", "visible_bases", "selectable_objects", "selectable_bases",
        "active_base", "active_object", NULL};

static int view3d_context(const bContext *C, const char *member, bContextDataResult *result)
{
        View3D *v3d= CTX_wm_view3d(C);
        Scene *scene= CTX_data_scene(C);
        Base *base;
        unsigned int lay = v3d ? v3d->lay:scene->lay; /* fallback to the scene layer, allows duplicate and other oject operators to run outside the 3d view */

        if(CTX_data_dir(member)) {
                CTX_data_dir_set(result, view3d_context_dir);
        }
        else if(CTX_data_equals(member, "selected_objects") || CTX_data_equals(member, "selected_bases")) {
                int selected_objects= CTX_data_equals(member, "selected_objects");

                for(base=scene->base.first; base; base=base->next) {
                        if((base->flag & SELECT) && (base->lay & lay)) {
                                if((base->object->restrictflag & OB_RESTRICT_VIEW)==0) {
                                        if(selected_objects)
                                                CTX_data_id_list_add(result, &base->object->id);
                                        else
                                                CTX_data_list_add(result, &scene->id, &RNA_ObjectBase, base);
                                }
                        }
                }
                CTX_data_type_set(result, CTX_DATA_TYPE_COLLECTION);
                return 1;
        }
        else if(CTX_data_equals(member, "selected_editable_objects") || CTX_data_equals(member, "selected_editable_bases")) {
                int selected_editable_objects= CTX_data_equals(member, "selected_editable_objects");

                for(base=scene->base.first; base; base=base->next) {
                        if((base->flag & SELECT) && (base->lay & lay)) {
                                if((base->object->restrictflag & OB_RESTRICT_VIEW)==0) {
                                        if(0==object_is_libdata(base->object)) {
                                                if(selected_editable_objects)
                                                        CTX_data_id_list_add(result, &base->object->id);
                                                else
                                                        CTX_data_list_add(result, &scene->id, &RNA_ObjectBase, base);
                                        }
                                }
                        }
                }
                CTX_data_type_set(result, CTX_DATA_TYPE_COLLECTION);
                return 1;
        }
        else if(CTX_data_equals(member, "visible_objects") || CTX_data_equals(member, "visible_bases")) {
                int visible_objects= CTX_data_equals(member, "visible_objects");

                for(base=scene->base.first; base; base=base->next) {
                        if(base->lay & lay) {
                                if((base->object->restrictflag & OB_RESTRICT_VIEW)==0) {
                                        if(visible_objects)
                                                CTX_data_id_list_add(result, &base->object->id);
                                        else
                                                CTX_data_list_add(result, &scene->id, &RNA_ObjectBase, base);
                                }
                        }
                }
                CTX_data_type_set(result, CTX_DATA_TYPE_COLLECTION);
                return 1;
        }
        else if(CTX_data_equals(member, "selectable_objects") || CTX_data_equals(member, "selectable_bases")) {
                int selectable_objects= CTX_data_equals(member, "selectable_objects");

                for(base=scene->base.first; base; base=base->next) {
                        if(base->lay & lay) {
                                if((base->object->restrictflag & OB_RESTRICT_VIEW)==0 && (base->object->restrictflag & OB_RESTRICT_SELECT)==0) {
                                        if(selectable_objects)
                                                CTX_data_id_list_add(result, &base->object->id);
                                        else
                                                CTX_data_list_add(result, &scene->id, &RNA_ObjectBase, base);
                                }
                        }
                }
                CTX_data_type_set(result, CTX_DATA_TYPE_COLLECTION);
                return 1;
        }
        else if(CTX_data_equals(member, "active_base")) {
                if(scene->basact && (scene->basact->lay & lay))
                        if((scene->basact->object->restrictflag & OB_RESTRICT_VIEW)==0)
                                CTX_data_pointer_set(result, &scene->id, &RNA_ObjectBase, scene->basact);
                
                return 1;
        }
        else if(CTX_data_equals(member, "active_object")) {
                if(scene->basact && (scene->basact->lay & lay))
                        if((scene->basact->object->restrictflag & OB_RESTRICT_VIEW)==0)
                                CTX_data_id_pointer_set(result, &scene->basact->object->id);
                
                return 1;
        }
        else {
                return 0; /* not found */
        }

        return -1; /* found but not available */
}


/* only called once, from space/spacetypes.c */
void ED_spacetype_view3d(void)
{
        SpaceType *st= MEM_callocN(sizeof(SpaceType), "spacetype view3d");
        ARegionType *art;
        
        st->spaceid= SPACE_VIEW3D;
        strncpy(st->name, "View3D", BKE_ST_MAXNAME);
        
        st->new= view3d_new;
        st->free= view3d_free;
        st->init= view3d_init;
        st->listener = space_view3d_listener;
        st->duplicate= view3d_duplicate;
        st->operatortypes= view3d_operatortypes;
        st->keymap= view3d_keymap;
        st->dropboxes= view3d_dropboxes;
        st->context= view3d_context;
        
        /* regions: main window */
        art= MEM_callocN(sizeof(ARegionType), "spacetype view3d main region");
        art->regionid = RGN_TYPE_WINDOW;
        art->keymapflag= ED_KEYMAP_GPENCIL;
        art->draw= view3d_main_area_draw;
        art->init= view3d_main_area_init;
        art->free= view3d_main_area_free;
        art->duplicate= view3d_main_area_duplicate;
        art->listener= view3d_main_area_listener;
        art->cursor= view3d_main_area_cursor;
        art->lock= 1;   /* can become flag, see BKE_spacedata_draw_locks */
        BLI_addhead(&st->regiontypes, art);
        
        /* regions: listview/buttons */
        art= MEM_callocN(sizeof(ARegionType), "spacetype view3d buttons region");
        art->regionid = RGN_TYPE_UI;
        art->prefsizex= 180; // XXX
        art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_FRAMES;
        art->listener= view3d_buttons_area_listener;
        art->init= view3d_buttons_area_init;
        art->draw= view3d_buttons_area_draw;
        BLI_addhead(&st->regiontypes, art);

        view3d_buttons_register(art);

        /* regions: tool(bar) */
        art= MEM_callocN(sizeof(ARegionType), "spacetype view3d tools region");
        art->regionid = RGN_TYPE_TOOLS;
        art->prefsizex= 160; // XXX
        art->prefsizey= 50; // XXX
        art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_FRAMES;
        art->listener= view3d_buttons_area_listener;
        art->init= view3d_tools_area_init;
        art->draw= view3d_tools_area_draw;
        BLI_addhead(&st->regiontypes, art);
        
#if 0
        /* unfinished still */
        view3d_toolshelf_register(art);
#endif

        /* regions: tool properties */
        art= MEM_callocN(sizeof(ARegionType), "spacetype view3d tool properties region");
        art->regionid = RGN_TYPE_TOOL_PROPS;
        art->prefsizex= 0;
        art->prefsizey= 120;
        art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_FRAMES;
        art->listener= view3d_props_area_listener;
        art->init= view3d_tools_area_init;
        art->draw= view3d_tools_area_draw;
        BLI_addhead(&st->regiontypes, art);
        
        view3d_tool_props_register(art);
        
        
        /* regions: header */
        art= MEM_callocN(sizeof(ARegionType), "spacetype view3d header region");
        art->regionid = RGN_TYPE_HEADER;
        art->prefsizey= HEADERY;
        art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_VIEW2D|ED_KEYMAP_FRAMES|ED_KEYMAP_HEADER;
        art->listener= view3d_header_area_listener;
        art->init= view3d_header_area_init;
        art->draw= view3d_header_area_draw;
        BLI_addhead(&st->regiontypes, art);
        
        BKE_spacetype_register(st);
}