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/*
* ***** 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, Nathan Letwory
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/editors/space_node/node_select.c
* \ingroup spnode
*/
#include <stdio.h>
#include "BLI_listbase.h"
#include "DNA_node_types.h"
#include "DNA_scene_types.h"
#include "BKE_context.h"
#include "BKE_main.h"
#include "BLI_rect.h"
#include "BLI_utildefines.h"
#include "ED_node.h"
#include "ED_screen.h"
#include "ED_types.h"
#include "RNA_access.h"
#include "RNA_define.h"
#include "WM_api.h"
#include "WM_types.h"
#include "UI_view2d.h"
#include "node_intern.h"
/* ****** helpers ****** */
static bNode *node_under_mouse(bNodeTree *ntree, int mx, int my)
{
bNode *node;
for(node=ntree->nodes.last; node; node=node->prev) {
/* node body (header and scale are in other operators) */
if (BLI_in_rctf(&node->totr, mx, my))
return node;
}
return NULL;
}
static int compare_nodes(bNode *a, bNode *b)
{
bNode *parent;
/* These tell if either the node or any of the parent nodes is selected.
* A selected parent means an unselected node is also in foreground!
*/
int a_select=(a->flag & NODE_SELECT), b_select=(b->flag & NODE_SELECT);
int a_active=(a->flag & NODE_ACTIVE), b_active=(b->flag & NODE_ACTIVE);
/* if one is an ancestor of the other */
/* XXX there might be a better sorting algorithm for stable topological sort, this is O(n^2) worst case */
for (parent = a->parent; parent; parent=parent->parent) {
/* if b is an ancestor, it is always behind a */
if (parent==b)
return 1;
/* any selected ancestor moves the node forward */
if (parent->flag & NODE_ACTIVE)
a_active = 1;
if (parent->flag & NODE_SELECT)
a_select = 1;
}
for (parent = b->parent; parent; parent=parent->parent) {
/* if a is an ancestor, it is always behind b */
if (parent==a)
return 0;
/* any selected ancestor moves the node forward */
if (parent->flag & NODE_ACTIVE)
b_active = 1;
if (parent->flag & NODE_SELECT)
b_select = 1;
}
/* if one of the nodes is in the background and the other not */
if ((a->flag & NODE_BACKGROUND) && !(b->flag & NODE_BACKGROUND))
return 0;
else if (!(a->flag & NODE_BACKGROUND) && (b->flag & NODE_BACKGROUND))
return 1;
/* if one has a higher selection state (active > selected > nothing) */
if (!b_active && a_active)
return 1;
else if (!b_select && (a_active || a_select))
return 1;
return 0;
}
/* Sorts nodes by selection: unselected nodes first, then selected,
* then the active node at the very end. Relative order is kept intact!
*/
static void node_sort(bNodeTree *ntree)
{
/* merge sort is the algorithm of choice here */
bNode *first_a, *first_b, *node_a, *node_b, *tmp;
int totnodes= BLI_countlist(&ntree->nodes);
int k, a, b;
k = 1;
while (k < totnodes) {
first_a = first_b = ntree->nodes.first;
do {
/* setup first_b pointer */
for (b=0; b < k && first_b; ++b) {
first_b = first_b->next;
}
/* all batches merged? */
if (first_b==NULL)
break;
/* merge batches */
node_a = first_a;
node_b = first_b;
a = b = 0;
while (a < k && b < k && node_b) {
if (compare_nodes(node_a, node_b)==0) {
node_a = node_a->next;
++a;
}
else {
tmp = node_b;
node_b = node_b->next;
++b;
BLI_remlink(&ntree->nodes, tmp);
BLI_insertlinkbefore(&ntree->nodes, node_a, tmp);
}
}
/* setup first pointers for next batch */
first_b = node_b;
for (; b < k; ++b) {
/* all nodes sorted? */
if (first_b==NULL)
break;
first_b = first_b->next;
}
first_a = first_b;
} while (first_b);
k = k << 1;
}
}
/* no undo here! */
void node_deselect_all(SpaceNode *snode)
{
bNode *node;
for(node= snode->edittree->nodes.first; node; node= node->next)
node->flag &= ~SELECT;
}
/* return 1 if we need redraw otherwise zero. */
int node_select_same_type(SpaceNode *snode)
{
bNode *nac, *p;
int redraw;
/* search for the active node. */
for (nac= snode->edittree->nodes.first; nac; nac= nac->next) {
if (nac->flag & SELECT)
break;
}
/* no active node, return. */
if (!nac)
return(0);
redraw= 0;
for (p= snode->edittree->nodes.first; p; p= p->next) {
if (p->type != nac->type && p->flag & SELECT) {
/* if it's selected but different type, unselect */
redraw= 1;
p->flag &= ~SELECT;
}
else if (p->type == nac->type && (!(p->flag & SELECT))) {
/* if it's the same type and is not selected, select! */
redraw= 1;
p->flag |= SELECT;
}
}
return(redraw);
}
/* return 1 if we need redraw, otherwise zero.
* dir can be 0 == next or 0 != prev.
*/
int node_select_same_type_np(SpaceNode *snode, int dir)
{
bNode *nac, *p;
/* search the active one. */
for (nac= snode->edittree->nodes.first; nac; nac= nac->next) {
if (nac->flag & SELECT)
break;
}
/* no active node, return. */
if (!nac)
return(0);
if (dir == 0)
p= nac->next;
else
p= nac->prev;
while (p) {
/* Now search the next with the same type. */
if (p->type == nac->type)
break;
if (dir == 0)
p= p->next;
else
p= p->prev;
}
if (p) {
node_deselect_all(snode);
p->flag |= SELECT;
return(1);
}
return(0);
}
void node_select_single(bContext *C, bNode *node)
{
Main *bmain= CTX_data_main(C);
SpaceNode *snode= CTX_wm_space_node(C);
node_deselect_all(snode);
node->flag |= SELECT;
ED_node_set_active(bmain, snode->edittree, node);
node_sort(snode->edittree);
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
}
/* ****** Click Select ****** */
static bNode *node_mouse_select(Main *bmain, SpaceNode *snode, ARegion *ar, const int mval[2], short extend)
{
bNode *node;
float mx, my;
/* get mouse coordinates in view2d space */
mx= (float)mval[0];
my= (float)mval[1];
UI_view2d_region_to_view(&ar->v2d, mval[0], mval[1], &mx, &my);
/* find the closest visible node */
node = node_under_mouse(snode->edittree, mx, my);
if (node) {
if (extend == 0) {
node_deselect_all(snode);
node->flag |= SELECT;
}
else
node->flag ^= SELECT;
ED_node_set_active(bmain, snode->edittree, node);
node_sort(snode->edittree);
}
return node;
}
static int node_select_exec(bContext *C, wmOperator *op)
{
Main *bmain= CTX_data_main(C);
SpaceNode *snode= CTX_wm_space_node(C);
ARegion *ar= CTX_wm_region(C);
int mval[2];
short extend;
/* bNode *node= NULL; */ /* UNUSED */
/* get settings from RNA properties for operator */
mval[0] = RNA_int_get(op->ptr, "mouse_x");
mval[1] = RNA_int_get(op->ptr, "mouse_y");
extend = RNA_boolean_get(op->ptr, "extend");
/* perform the select */
/* node= */ /* UNUSED*/ node_mouse_select(bmain, snode, ar, mval, extend);
/* send notifiers */
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
/* allow tweak event to work too */
return OPERATOR_FINISHED|OPERATOR_PASS_THROUGH;
}
static int node_select_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
RNA_int_set(op->ptr, "mouse_x", event->mval[0]);
RNA_int_set(op->ptr, "mouse_y", event->mval[1]);
return node_select_exec(C,op);
}
void NODE_OT_select(wmOperatorType *ot)
{
/* identifiers */
ot->name= "Select";
ot->idname= "NODE_OT_select";
ot->description= "Select the node under the cursor";
/* api callbacks */
ot->invoke= node_select_invoke;
ot->poll= ED_operator_node_active;
/* flags */
ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
/* properties */
RNA_def_int(ot->srna, "mouse_x", 0, INT_MIN, INT_MAX, "Mouse X", "", INT_MIN, INT_MAX);
RNA_def_int(ot->srna, "mouse_y", 0, INT_MIN, INT_MAX, "Mouse Y", "", INT_MIN, INT_MAX);
RNA_def_boolean(ot->srna, "extend", 0, "Extend", "");
}
/* ****** Border Select ****** */
static int node_borderselect_exec(bContext *C, wmOperator *op)
{
SpaceNode *snode= CTX_wm_space_node(C);
ARegion *ar= CTX_wm_region(C);
bNode *node;
rcti rect;
rctf rectf;
int gesture_mode= RNA_int_get(op->ptr, "gesture_mode");
int extend= RNA_boolean_get(op->ptr, "extend");
rect.xmin= RNA_int_get(op->ptr, "xmin");
rect.ymin= RNA_int_get(op->ptr, "ymin");
UI_view2d_region_to_view(&ar->v2d, rect.xmin, rect.ymin, &rectf.xmin, &rectf.ymin);
rect.xmax= RNA_int_get(op->ptr, "xmax");
rect.ymax= RNA_int_get(op->ptr, "ymax");
UI_view2d_region_to_view(&ar->v2d, rect.xmax, rect.ymax, &rectf.xmax, &rectf.ymax);
for(node= snode->edittree->nodes.first; node; node= node->next) {
if(BLI_isect_rctf(&rectf, &node->totr, NULL)) {
if(gesture_mode==GESTURE_MODAL_SELECT)
node->flag |= SELECT;
else
node->flag &= ~SELECT;
}
else if(!extend) {
node->flag &= ~SELECT;
}
}
node_sort(snode->edittree);
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
return OPERATOR_FINISHED;
}
static int node_border_select_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
int tweak = RNA_boolean_get(op->ptr, "tweak");
if (tweak) {
/* prevent initiating the border select if the mouse is over a node */
/* this allows border select on empty space, but drag-translate on nodes */
SpaceNode *snode= CTX_wm_space_node(C);
ARegion *ar= CTX_wm_region(C);
float mx, my;
UI_view2d_region_to_view(&ar->v2d, event->mval[0], event->mval[1], &mx, &my);
if (node_under_mouse(snode->edittree, mx, my))
return OPERATOR_CANCELLED|OPERATOR_PASS_THROUGH;
}
return WM_border_select_invoke(C, op, event);
}
void NODE_OT_select_border(wmOperatorType *ot)
{
/* identifiers */
ot->name= "Border Select";
ot->idname= "NODE_OT_select_border";
ot->description= "Use box selection to select nodes";
/* api callbacks */
ot->invoke= node_border_select_invoke;
ot->exec= node_borderselect_exec;
ot->modal= WM_border_select_modal;
ot->cancel= WM_border_select_cancel;
ot->poll= ED_operator_node_active;
/* flags */
ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
/* rna */
WM_operator_properties_gesture_border(ot, TRUE);
RNA_def_boolean(ot->srna, "tweak", 0, "Tweak", "Only activate when mouse is not over a node - useful for tweak gesture");
}
/* ****** Select/Deselect All ****** */
static int node_select_all_exec(bContext *C, wmOperator *UNUSED(op))
{
SpaceNode *snode = CTX_wm_space_node(C);
bNode *first = snode->edittree->nodes.first;
bNode *node;
int count= 0;
for(node=first; node; node=node->next)
if(node->flag & NODE_SELECT)
count++;
if(count) {
for(node=first; node; node=node->next)
node->flag &= ~NODE_SELECT;
}
else {
for(node=first; node; node=node->next)
node->flag |= NODE_SELECT;
}
node_sort(snode->edittree);
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
return OPERATOR_FINISHED;
}
void NODE_OT_select_all(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Select or Deselect All";
ot->description = "(De)select all nodes";
ot->idname = "NODE_OT_select_all";
/* api callbacks */
ot->exec = node_select_all_exec;
ot->poll = ED_operator_node_active;
/* flags */
ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
}
/* ****** Select Linked To ****** */
static int node_select_linked_to_exec(bContext *C, wmOperator *UNUSED(op))
{
SpaceNode *snode = CTX_wm_space_node(C);
bNodeLink *link;
bNode *node;
for (node=snode->edittree->nodes.first; node; node=node->next)
node->flag &= ~NODE_TEST;
for (link=snode->edittree->links.first; link; link=link->next) {
if (link->fromnode && link->tonode && (link->fromnode->flag & NODE_SELECT))
link->tonode->flag |= NODE_TEST;
}
for (node=snode->edittree->nodes.first; node; node=node->next) {
if (node->flag & NODE_TEST)
node->flag |= NODE_SELECT;
}
node_sort(snode->edittree);
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
return OPERATOR_FINISHED;
}
void NODE_OT_select_linked_to(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Select Linked To";
ot->description = "Select nodes linked to the selected ones";
ot->idname = "NODE_OT_select_linked_to";
/* api callbacks */
ot->exec = node_select_linked_to_exec;
ot->poll = ED_operator_node_active;
/* flags */
ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
}
/* ****** Select Linked From ****** */
static int node_select_linked_from_exec(bContext *C, wmOperator *UNUSED(op))
{
SpaceNode *snode = CTX_wm_space_node(C);
bNodeLink *link;
bNode *node;
for(node=snode->edittree->nodes.first; node; node=node->next)
node->flag &= ~NODE_TEST;
for(link=snode->edittree->links.first; link; link=link->next) {
if(link->fromnode && link->tonode && (link->tonode->flag & NODE_SELECT))
link->fromnode->flag |= NODE_TEST;
}
for(node=snode->edittree->nodes.first; node; node=node->next) {
if(node->flag & NODE_TEST)
node->flag |= NODE_SELECT;
}
node_sort(snode->edittree);
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
return OPERATOR_FINISHED;
}
void NODE_OT_select_linked_from(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Select Linked From";
ot->description = "Select nodes linked from the selected ones";
ot->idname = "NODE_OT_select_linked_from";
/* api callbacks */
ot->exec = node_select_linked_from_exec;
ot->poll = ED_operator_node_active;
/* flags */
ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
}
/* ****** Select Same Type ****** */
static int node_select_same_type_exec(bContext *C, wmOperator *UNUSED(op))
{
SpaceNode *snode = CTX_wm_space_node(C);
node_select_same_type(snode);
node_sort(snode->edittree);
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
return OPERATOR_FINISHED;
}
void NODE_OT_select_same_type(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Select Same Type";
ot->description = "Select all the nodes of the same type";
ot->idname = "NODE_OT_select_same_type";
/* api callbacks */
ot->exec = node_select_same_type_exec;
ot->poll = ED_operator_node_active;
/* flags */
ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
}
/* ****** Select The Next/Prev Node Of The Same Type ****** */
static int node_select_same_type_next_exec(bContext *C, wmOperator *UNUSED(op))
{
SpaceNode *snode = CTX_wm_space_node(C);
node_select_same_type_np(snode, 0);
node_sort(snode->edittree);
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
return OPERATOR_FINISHED;
}
void NODE_OT_select_same_type_next(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Select Same Type Next";
ot->description = "Select the next node of the same type";
ot->idname = "NODE_OT_select_same_type_next";
/* api callbacks */
ot->exec = node_select_same_type_next_exec;
ot->poll = ED_operator_node_active;
/* flags */
ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
}
static int node_select_same_type_prev_exec(bContext *C, wmOperator *UNUSED(op))
{
SpaceNode *snode = CTX_wm_space_node(C);
node_select_same_type_np(snode, 1);
node_sort(snode->edittree);
WM_event_add_notifier(C, NC_NODE|NA_SELECTED, NULL);
return OPERATOR_FINISHED;
}
void NODE_OT_select_same_type_prev(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Select Same Type Prev";
ot->description = "Select the prev node of the same type";
ot->idname = "NODE_OT_select_same_type_prev";
/* api callbacks */
ot->exec = node_select_same_type_prev_exec;
ot->poll = ED_operator_node_active;
/* flags */
ot->flag = OPTYPE_REGISTER|OPTYPE_UNDO;
}
|