/* * $XConsortium: Tree.c,v 1.43 91/10/16 21:40:18 eswu Exp $ * * Copyright 1990 Massachusetts Institute of Technology * Copyright 1989 Prentice Hall * * Permission to use, copy, modify, and distribute this software for any * purpose and without fee is hereby granted, provided that the above * copyright notice appear in all copies and that both the copyright notice * and this permission notice appear in supporting documentation. * * M.I.T., Prentice Hall and the authors disclaim all warranties with regard * to this software, including all implied warranties of merchantability and * fitness. In no event shall M.I.T., Prentice Hall or the authors be liable * for any special, indirect or cosequential 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. * * Authors: Jim Fulton, MIT X Consortium, * based on a version by Douglas Young, Prentice Hall * * This widget is based on the Tree widget described on pages 397-419 of * Douglas Young's book "The X Window System, Programming and Applications * with Xt OSF/Motif Edition." The layout code has been rewritten to use * additional blank space to make the structure of the graph easier to see * as well as to support vertical trees. */ #include #include #include #include #include #include #include #include #include #define IsHorizontal(tw) ((tw)->tree.gravity == WestGravity || \ (tw)->tree.gravity == EastGravity) /* widget class method */ static void ClassInitialize(); static void Initialize(); static void ConstraintInitialize(); static void ConstraintDestroy(); static Boolean ConstraintSetValues(); static void Destroy(); static Boolean SetValues(); static XtGeometryResult GeometryManager(); static void ChangeManaged(); static void Redisplay(); static XtGeometryResult QueryGeometry(); /* utility routines */ static void insert_node(); static void delete_node(); static void layout_tree(); /* * resources of the tree itself */ static XtResource resources[] = { { XtNautoReconfigure, XtCAutoReconfigure, XtRBoolean, sizeof (Boolean), XtOffsetOf(TreeRec, tree.auto_reconfigure), XtRImmediate, (XtPointer) FALSE }, { XtNhSpace, XtCHSpace, XtRDimension, sizeof (Dimension), XtOffsetOf(TreeRec, tree.hpad), XtRImmediate, (XtPointer) 0 }, { XtNvSpace, XtCVSpace, XtRDimension, sizeof (Dimension), XtOffsetOf(TreeRec, tree.vpad), XtRImmediate, (XtPointer) 0 }, { XtNforeground, XtCForeground, XtRPixel, sizeof (Pixel), XtOffsetOf(TreeRec, tree.foreground), XtRString, XtDefaultForeground}, { XtNlineWidth, XtCLineWidth, XtRDimension, sizeof (Dimension), XtOffsetOf(TreeRec, tree.line_width), XtRImmediate, (XtPointer) 0 }, { XtNgravity, XtCGravity, XtRGravity, sizeof (XtGravity), XtOffsetOf(TreeRec, tree.gravity), XtRImmediate, (XtPointer) WestGravity }, }; /* * resources that are attached to all children of the tree */ static XtResource treeConstraintResources[] = { { XtNtreeParent, XtCTreeParent, XtRWidget, sizeof (Widget), XtOffsetOf(TreeConstraintsRec, tree.parent), XtRImmediate, NULL }, { XtNtreeGC, XtCTreeGC, XtRGC, sizeof(GC), XtOffsetOf(TreeConstraintsRec, tree.gc), XtRImmediate, NULL }, }; TreeClassRec treeClassRec = { { /* core_class fields */ (WidgetClass) &constraintClassRec, /* superclass */ "Tree", /* class_name */ sizeof(TreeRec), /* widget_size */ ClassInitialize, /* class_init */ NULL, /* class_part_init */ FALSE, /* class_inited */ Initialize, /* initialize */ NULL, /* initialize_hook */ XtInheritRealize, /* realize */ NULL, /* actions */ 0, /* num_actions */ resources, /* resources */ XtNumber(resources), /* num_resources */ NULLQUARK, /* xrm_class */ TRUE, /* compress_motion */ TRUE, /* compress_exposure */ TRUE, /* compress_enterleave*/ TRUE, /* visible_interest */ Destroy, /* destroy */ NULL, /* resize */ Redisplay, /* expose */ SetValues, /* set_values */ NULL, /* set_values_hook */ XtInheritSetValuesAlmost, /* set_values_almost */ NULL, /* get_values_hook */ NULL, /* accept_focus */ XtVersion, /* version */ NULL, /* callback_private */ NULL, /* tm_table */ QueryGeometry, /* query_geometry */ NULL, /* display_accelerator*/ NULL, /* extension */ }, { /* composite_class fields */ GeometryManager, /* geometry_manager */ ChangeManaged, /* change_managed */ XtInheritInsertChild, /* insert_child */ XtInheritDeleteChild, /* delete_child */ NULL, /* extension */ }, { /* constraint_class fields */ treeConstraintResources, /* subresources */ XtNumber(treeConstraintResources), /* subresource_count */ sizeof(TreeConstraintsRec), /* constraint_size */ ConstraintInitialize, /* initialize */ ConstraintDestroy, /* destroy */ ConstraintSetValues, /* set_values */ NULL, /* extension */ }, { /* Tree class fields */ 0, /* ignore */ } }; WidgetClass treeWidgetClass = (WidgetClass) &treeClassRec; /***************************************************************************** * * * tree utility routines * * * *****************************************************************************/ static void initialize_dimensions (listp, sizep, n) Dimension **listp; int *sizep; int n; { register int i; register Dimension *l; if (!*listp) { *listp = (Dimension *) XtCalloc ((unsigned int) n, (unsigned int) sizeof(Dimension)); *sizep = ((*listp) ? n : 0); return; } if (n > *sizep) { *listp = (Dimension *) XtRealloc((char *) *listp, (unsigned int) (n*sizeof(Dimension))); if (!*listp) { *sizep = 0; return; } for (i = *sizep, l = (*listp) + i; i < n; i++, l++) *l = 0; *sizep = n; } return; } static GC get_tree_gc (w) TreeWidget w; { XtGCMask valuemask = GCBackground | GCForeground; XGCValues values; values.background = w->core.background_pixel; values.foreground = w->tree.foreground; if (w->tree.line_width != 0) { valuemask |= GCLineWidth; values.line_width = w->tree.line_width; } return XtGetGC ((Widget) w, valuemask, &values); } static void insert_node (parent, node) Widget parent, node; { TreeConstraints pc; TreeConstraints nc = TREE_CONSTRAINT(node); int nindex; nc->tree.parent = parent; if (parent == NULL) return; /* * If there isn't more room in the children array, * allocate additional space. */ pc = TREE_CONSTRAINT(parent); nindex = pc->tree.n_children; if (pc->tree.n_children == pc->tree.max_children) { pc->tree.max_children += (pc->tree.max_children / 2) + 2; pc->tree.children = (WidgetList) XtRealloc ((char *)pc->tree.children, (unsigned int) ((pc->tree.max_children) * sizeof(Widget))); } /* * Add the sub_node in the next available slot and * increment the counter. */ pc->tree.children[nindex] = node; pc->tree.n_children++; } static void delete_node (parent, node) Widget parent, node; { TreeConstraints pc; int pos, i; /* * Make sure the parent exists. */ if (!parent) return; pc = TREE_CONSTRAINT(parent); /* * Find the sub_node on its parent's list. */ for (pos = 0; pos < pc->tree.n_children; pos++) if (pc->tree.children[pos] == node) break; if (pos == pc->tree.n_children) return; /* * Decrement the number of children */ pc->tree.n_children--; /* * Fill in the gap left by the sub_node. * Zero the last slot for good luck. */ for (i = pos; i < pc->tree.n_children; i++) pc->tree.children[i] = pc->tree.children[i+1]; pc->tree.children[pc->tree.n_children]=0; } static void check_gravity (tw, grav) TreeWidget tw; XtGravity grav; { switch (tw->tree.gravity) { case WestGravity: case NorthGravity: case EastGravity: case SouthGravity: break; default: tw->tree.gravity = grav; break; } } /***************************************************************************** * * * tree class methods * * * *****************************************************************************/ static void ClassInitialize () { XawInitializeWidgetSet(); XtAddConverter (XtRString, XtRGravity, XmuCvtStringToGravity, (XtConvertArgList) NULL, (Cardinal) 0); } static void Initialize (grequest, gnew, args, num_args) Widget grequest, gnew; ArgList args; Cardinal *num_args; { TreeWidget request = (TreeWidget) grequest, new = (TreeWidget) gnew; Arg arglist[2]; /* * Make sure the widget's width and height are * greater than zero. */ if (request->core.width <= 0) new->core.width = 5; if (request->core.height <= 0) new->core.height = 5; /* * Set the padding according to the orientation */ if (request->tree.hpad == 0 && request->tree.vpad == 0) { if (IsHorizontal (request)) { new->tree.hpad = TREE_HORIZONTAL_DEFAULT_SPACING; new->tree.vpad = TREE_VERTICAL_DEFAULT_SPACING; } else { new->tree.hpad = TREE_VERTICAL_DEFAULT_SPACING; new->tree.vpad = TREE_HORIZONTAL_DEFAULT_SPACING; } } /* * Create a graphics context for the connecting lines. */ new->tree.gc = get_tree_gc (new); /* * Create the hidden root widget. */ new->tree.tree_root = (Widget) NULL; XtSetArg(arglist[0], XtNwidth, 1); XtSetArg(arglist[1], XtNheight, 1); new->tree.tree_root = XtCreateWidget ("root", widgetClass, gnew, arglist,TWO); /* * Allocate the array used to hold the widest values per depth */ new->tree.largest = NULL; new->tree.n_largest = 0; initialize_dimensions (&new->tree.largest, &new->tree.n_largest, TREE_INITIAL_DEPTH); /* * make sure that our gravity is one of the acceptable values */ check_gravity (new, WestGravity); } /* ARGSUSED */ static void ConstraintInitialize (request, new, args, num_args) Widget request, new; ArgList args; Cardinal *num_args; { TreeConstraints tc = TREE_CONSTRAINT(new); TreeWidget tw = (TreeWidget) new->core.parent; /* * Initialize the widget to have no sub-nodes. */ tc->tree.n_children = 0; tc->tree.max_children = 0; tc->tree.children = (Widget *) NULL; tc->tree.x = tc->tree.y = 0; tc->tree.bbsubwidth = 0; tc->tree.bbsubheight = 0; /* * If this widget has a super-node, add it to that * widget' sub-nodes list. Otherwise make it a sub-node of * the tree_root widget. */ if (tc->tree.parent) insert_node (tc->tree.parent, new); else if (tw->tree.tree_root) insert_node (tw->tree.tree_root, new); } /* ARGSUSED */ static Boolean SetValues (gcurrent, grequest, gnew, args, num_args) Widget gcurrent, grequest, gnew; ArgList args; Cardinal *num_args; { TreeWidget current = (TreeWidget) gcurrent, new = (TreeWidget) gnew; Boolean redraw = FALSE; /* * If the foreground color has changed, redo the GC's * and indicate a redraw. */ if (new->tree.foreground != current->tree.foreground || new->core.background_pixel != current->core.background_pixel || new->tree.line_width != current->tree.line_width) { XtReleaseGC (gnew, new->tree.gc); new->tree.gc = get_tree_gc (new); redraw = TRUE; } /* * If the minimum spacing has changed, recalculate the * tree layout. layout_tree() does a redraw, so we don't * need SetValues to do another one. */ if (new->tree.gravity != current->tree.gravity) { check_gravity (new, current->tree.gravity); } if (IsHorizontal(new) != IsHorizontal(current)) { if (new->tree.vpad == current->tree.vpad && new->tree.hpad == current->tree.hpad) { new->tree.vpad = current->tree.hpad; new->tree.hpad = current->tree.vpad; } } if (new->tree.vpad != current->tree.vpad || new->tree.hpad != current->tree.hpad || new->tree.gravity != current->tree.gravity) { layout_tree (new, TRUE); redraw = FALSE; } return redraw; } /* ARGSUSED */ static Boolean ConstraintSetValues (current, request, new, args, num_args) Widget current, request, new; ArgList args; Cardinal *num_args; { TreeConstraints newc = TREE_CONSTRAINT(new); TreeConstraints curc = TREE_CONSTRAINT(current); TreeWidget tw = (TreeWidget) new->core.parent; /* * If the parent field has changed, remove the widget * from the old widget's children list and add it to the * new one. */ if (curc->tree.parent != newc->tree.parent){ if (curc->tree.parent) delete_node (curc->tree.parent, new); if (newc->tree.parent) insert_node(newc->tree.parent, new); /* * If the Tree widget has been realized, * compute new layout. */ if (XtIsRealized((Widget)tw)) layout_tree (tw, FALSE); } return False; } static void ConstraintDestroy (w) Widget w; { TreeConstraints tc = TREE_CONSTRAINT(w); TreeWidget tw = (TreeWidget) XtParent(w); int i; /* * Remove the widget from its parent's sub-nodes list and * make all this widget's sub-nodes sub-nodes of the parent. */ if (tw->tree.tree_root == w) { if (tc->tree.n_children > 0) tw->tree.tree_root = tc->tree.children[0]; else tw->tree.tree_root = NULL; } delete_node (tc->tree.parent, (Widget) w); for (i = 0; i< tc->tree.n_children; i++) insert_node (tc->tree.parent, tc->tree.children[i]); layout_tree ((TreeWidget) (w->core.parent), FALSE); } /* ARGSUSED */ static XtGeometryResult GeometryManager (w, request, reply) Widget w; XtWidgetGeometry *request; XtWidgetGeometry *reply; { TreeWidget tw = (TreeWidget) w->core.parent; /* * No position changes allowed!. */ if ((request->request_mode & CWX && request->x!=w->core.x) ||(request->request_mode & CWY && request->y!=w->core.y)) return (XtGeometryNo); /* * Allow all resize requests. */ if (request->request_mode & CWWidth) w->core.width = request->width; if (request->request_mode & CWHeight) w->core.height = request->height; if (request->request_mode & CWBorderWidth) w->core.border_width = request->border_width; if (tw->tree.auto_reconfigure) layout_tree (tw, FALSE); return (XtGeometryYes); } static void ChangeManaged (gw) Widget gw; { layout_tree ((TreeWidget) gw, FALSE); } static void Destroy (gw) Widget gw; { TreeWidget w = (TreeWidget) gw; XtReleaseGC (gw, w->tree.gc); if (w->tree.largest) XtFree ((char *) w->tree.largest); } /* ARGSUSED */ static void Redisplay (gw, event, region) Widget gw; XEvent *event; Region region; { TreeWidget tw = (TreeWidget) gw; /* * If the Tree widget is visible, visit each managed child. */ if (tw->core.visible) { int i, j; Display *dpy = XtDisplay (tw); Window w = XtWindow (tw); for (i = 0; i < tw->composite.num_children; i++) { register Widget child = tw->composite.children[i]; TreeConstraints tc = TREE_CONSTRAINT(child); /* * Don't draw lines from the fake tree_root. */ if (child != tw->tree.tree_root && tc->tree.n_children) { int srcx = child->core.x + child->core.border_width; int srcy = child->core.y + child->core.border_width; switch (tw->tree.gravity) { case WestGravity: srcx += child->core.width + child->core.border_width; /* fall through */ case EastGravity: srcy += child->core.height / 2; break; case NorthGravity: srcy += child->core.height + child->core.border_width; /* fall through */ case SouthGravity: srcx += child->core.width / 2; break; } for (j = 0; j < tc->tree.n_children; j++) { register Widget k = tc->tree.children[j]; GC gc = (tc->tree.gc ? tc->tree.gc : tw->tree.gc); switch (tw->tree.gravity) { case WestGravity: /* * right center to left center */ XDrawLine (dpy, w, gc, srcx, srcy, (int) k->core.x, (k->core.y + ((int) k->core.border_width) + ((int) k->core.height) / 2)); break; case NorthGravity: /* * bottom center to top center */ XDrawLine (dpy, w, gc, srcx, srcy, (k->core.x + ((int) k->core.border_width) + ((int) k->core.width) / 2), (int) k->core.y); break; case EastGravity: /* * left center to right center */ XDrawLine (dpy, w, gc, srcx, srcy, (k->core.x + (((int) k->core.border_width) << 1) + (int) k->core.width), (k->core.y + ((int) k->core.border_width) + ((int) k->core.height) / 2)); break; case SouthGravity: /* * top center to bottom center */ XDrawLine (dpy, w, gc, srcx, srcy, (k->core.x + ((int) k->core.border_width) + ((int) k->core.width) / 2), (k->core.y + (((int) k->core.border_width) << 1) + (int) k->core.height)); break; } } } } } } static XtGeometryResult QueryGeometry (w, intended, preferred) Widget w; XtWidgetGeometry *intended, *preferred; { register TreeWidget tw = (TreeWidget) w; preferred->request_mode = (CWWidth | CWHeight); preferred->width = tw->tree.maxwidth; preferred->height = tw->tree.maxheight; if (((intended->request_mode & (CWWidth | CWHeight)) == (CWWidth | CWHeight)) && intended->width == preferred->width && intended->height == preferred->height) return XtGeometryYes; else if (preferred->width == w->core.width && preferred->height == w->core.height) return XtGeometryNo; else return XtGeometryAlmost; } /***************************************************************************** * * * tree layout algorithm * * * * Each node in the tree is "shrink-wrapped" with a minimal bounding * * rectangle, laid next to its siblings (with a small about of padding in * * between) and then wrapped with their parent. Parents are centered about * * their children (or vice versa if the parent is larger than the children). * * * *****************************************************************************/ static void compute_bounding_box_subtree (tree, w, depth) TreeWidget tree; Widget w; int depth; { TreeConstraints tc = TREE_CONSTRAINT(w); /* info attached to all kids */ register int i; Bool horiz = IsHorizontal (tree); Dimension newwidth, newheight; Dimension bw2 = w->core.border_width * 2; /* * Set the max-size per level. */ if (depth >= tree->tree.n_largest) { initialize_dimensions (&tree->tree.largest, &tree->tree.n_largest, depth + 1); } newwidth = ((horiz ? w->core.width : w->core.height) + bw2); if (tree->tree.largest[depth] < newwidth) tree->tree.largest[depth] = newwidth; /* * initialize */ tc->tree.bbwidth = w->core.width + bw2; tc->tree.bbheight = w->core.height + bw2; if (tc->tree.n_children == 0) return; /* * Figure the size of the opposite dimension (vertical if tree is * horizontal, else vice versa). The other dimension will be set * in the second pass once we know the maximum dimensions. */ newwidth = 0; newheight = 0; for (i = 0; i < tc->tree.n_children; i++) { Widget child = tc->tree.children[i]; TreeConstraints cc = TREE_CONSTRAINT(child); compute_bounding_box_subtree (tree, child, depth + 1); if (horiz) { if (newwidth < cc->tree.bbwidth) newwidth = cc->tree.bbwidth; newheight += tree->tree.vpad + cc->tree.bbheight; } else { if (newheight < cc->tree.bbheight) newheight = cc->tree.bbheight; newwidth += tree->tree.hpad + cc->tree.bbwidth; } } tc->tree.bbsubwidth = newwidth; tc->tree.bbsubheight = newheight; /* * Now fit parent onto side (or top) of bounding box and correct for * extra padding. Be careful of unsigned arithmetic. */ if (horiz) { tc->tree.bbwidth += tree->tree.hpad + newwidth; newheight -= tree->tree.vpad; if (newheight > tc->tree.bbheight) tc->tree.bbheight = newheight; } else { tc->tree.bbheight += tree->tree.vpad + newheight; newwidth -= tree->tree.hpad; if (newwidth > tc->tree.bbwidth) tc->tree.bbwidth = newwidth; } } static void set_positions (tw, w, level) TreeWidget tw; Widget w; int level; { int i; if (w) { TreeConstraints tc = TREE_CONSTRAINT(w); if (level > 0) { /* * mirror if necessary */ switch (tw->tree.gravity) { case EastGravity: tc->tree.x = (((Position) tw->tree.maxwidth) - ((Position) w->core.width) - tc->tree.x); break; case SouthGravity: tc->tree.y = (((Position) tw->tree.maxheight) - ((Position) w->core.height) - tc->tree.y); break; } /* * Move the widget into position. */ XtMoveWidget (w, tc->tree.x, tc->tree.y); } /* * Set the positions of all children. */ for (i = 0; i < tc->tree.n_children; i++) set_positions (tw, tc->tree.children[i], level + 1); } } static void arrange_subtree (tree, w, depth, x, y) TreeWidget tree; Widget w; int depth; Position x, y; { TreeConstraints tc = TREE_CONSTRAINT(w); /* info attached to all kids */ TreeConstraints firstcc, lastcc; register int i; int newx, newy; Bool horiz = IsHorizontal (tree); Widget child = NULL; Dimension tmp; Dimension bw2 = w->core.border_width * 2; Bool relayout = True; /* * If no children, then just lay out where requested. */ tc->tree.x = x; tc->tree.y = y; if (horiz) { int myh = (w->core.height + bw2); if (myh > (int)tc->tree.bbsubheight) { y += (myh - (int)tc->tree.bbsubheight) / 2; relayout = False; } } else { int myw = (w->core.width + bw2); if (myw > (int)tc->tree.bbsubwidth) { x += (myw - (int)tc->tree.bbsubwidth) / 2; relayout = False; } } if ((tmp = ((Dimension) x) + tc->tree.bbwidth) > tree->tree.maxwidth) tree->tree.maxwidth = tmp; if ((tmp = ((Dimension) y) + tc->tree.bbheight) > tree->tree.maxheight) tree->tree.maxheight = tmp; if (tc->tree.n_children == 0) return; /* * Have children, so walk down tree laying out children, then laying * out parents. */ if (horiz) { newx = x + tree->tree.largest[depth]; if (depth > 0) newx += tree->tree.hpad; newy = y; } else { newx = x; newy = y + tree->tree.largest[depth]; if (depth > 0) newy += tree->tree.vpad; } for (i = 0; i < tc->tree.n_children; i++) { TreeConstraints cc; child = tc->tree.children[i]; /* last value is used outside loop */ cc = TREE_CONSTRAINT(child); arrange_subtree (tree, child, depth + 1, newx, newy); if (horiz) { newy += tree->tree.vpad + cc->tree.bbheight; } else { newx += tree->tree.hpad + cc->tree.bbwidth; } } /* * now layout parent between first and last children */ if (relayout) { Position adjusted; firstcc = TREE_CONSTRAINT (tc->tree.children[0]); lastcc = TREE_CONSTRAINT (child); /* Adjustments are disallowed if they result in a position above * or to the left of the originally requested position, because * this could collide with the position of the previous sibling. */ if (horiz) { tc->tree.x = x; adjusted = firstcc->tree.y + ((lastcc->tree.y + (Position) child->core.height + (Position) child->core.border_width * 2 - firstcc->tree.y - (Position) w->core.height - (Position) w->core.border_width * 2 + 1) / 2); if (adjusted > tc->tree.y) tc->tree.y = adjusted; } else { adjusted = firstcc->tree.x + ((lastcc->tree.x + (Position) child->core.width + (Position) child->core.border_width * 2 - firstcc->tree.x - (Position) w->core.width - (Position) w->core.border_width * 2 + 1) / 2); if (adjusted > tc->tree.x) tc->tree.x = adjusted; tc->tree.y = y; } } } static void set_tree_size (tw, insetvalues, width, height) TreeWidget tw; Boolean insetvalues; Dimension width, height; { if (insetvalues) { tw->core.width = width; tw->core.height = height; } else { Dimension replyWidth = 0, replyHeight = 0; XtGeometryResult result = XtMakeResizeRequest ((Widget) tw, width, height, &replyWidth, &replyHeight); /* * Accept any compromise. */ if (result == XtGeometryAlmost) XtMakeResizeRequest ((Widget) tw, replyWidth, replyHeight, (Dimension *) NULL, (Dimension *) NULL); } return; } static void layout_tree (tw, insetvalues) TreeWidget tw; Boolean insetvalues; { int i; Dimension *dp; /* * Do a depth-first search computing the width and height of the bounding * box for the tree at that position (and below). Then, walk again using * this information to layout the children at each level. */ if (tw->tree.tree_root == NULL) return; tw->tree.maxwidth = tw->tree.maxheight = 0; for (i = 0, dp = tw->tree.largest; i < tw->tree.n_largest; i++, dp++) *dp = 0; initialize_dimensions (&tw->tree.largest, &tw->tree.n_largest, tw->tree.n_largest); compute_bounding_box_subtree (tw, tw->tree.tree_root, 0); /* * Second pass to do final layout. Each child's bounding box is stacked * on top of (if horizontal, else next to) on top of its siblings. The * parent is centered between the first and last children. */ arrange_subtree (tw, tw->tree.tree_root, 0, 0, 0); /* * Move each widget into place. */ set_tree_size (tw, insetvalues, tw->tree.maxwidth, tw->tree.maxheight); set_positions (tw, tw->tree.tree_root, 0); /* * And redisplay. */ if (XtIsRealized ((Widget) tw)) { XClearArea (XtDisplay(tw), XtWindow((Widget)tw), 0, 0, 0, 0, True); } } /***************************************************************************** * * * Public Routines * * * *****************************************************************************/ void #if NeedFunctionPrototypes XawTreeForceLayout (Widget tree) #else XawTreeForceLayout (tree) Widget tree; #endif { layout_tree ((TreeWidget) tree, FALSE); }