From 7d51879c281d91b4d84a4c06b0dbe2568d4c10cf Mon Sep 17 00:00:00 2001
From: treectrl <treectrl>
Date: Sun, 19 Nov 2006 00:48:11 +0000
Subject: Added 2 optional arguments to [selection get] to perform lindex- and
 lrange-like operations on the sorted list of selected items.

---
 generic/tkTreeCtrl.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 generic/tkTreeCtrl.h |  3 ++-
 generic/tkTreeItem.c | 44 ++++++++++++++++++++++++++++++++++++-
 3 files changed, 106 insertions(+), 3 deletions(-)

diff --git a/generic/tkTreeCtrl.c b/generic/tkTreeCtrl.c
index 1b430b1..a5b1c33 100644
--- a/generic/tkTreeCtrl.c
+++ b/generic/tkTreeCtrl.c
@@ -7,7 +7,7 @@
  * Copyright (c) 2002-2003 Christian Krone
  * Copyright (c) 2003-2005 ActiveState, a division of Sophos
  *
- * RCS: @(#) $Id: tkTreeCtrl.c,v 1.86 2006/11/15 23:52:13 treectrl Exp $
+ * RCS: @(#) $Id: tkTreeCtrl.c,v 1.87 2006/11/19 00:48:11 treectrl Exp $
  */
 
 #include "tkTreeCtrl.h"
@@ -2724,10 +2724,70 @@ doneCLEAR:
 	    Tcl_HashEntry *hPtr;
 	    Tcl_HashSearch search;
 
+#ifdef SELECTION_VISIBLE
+	    if (objc < 3 || objc > 5) {
+		Tcl_WrongNumArgs(interp, 3, objv, "?first? ?last?");
+		return TCL_ERROR;
+	    }
+	    if (objc > 3) {
+		int first, last;
+		TreeItemList items;
+
+		if (TclGetIntForIndex(interp, objv[3], tree->selectCount - 1,
+			&first) != TCL_OK) {
+		    return TCL_ERROR;
+		}
+		if (first < 0)
+		    first = 0;
+		last = first;
+		if (objc == 5) {
+		    if (TclGetIntForIndex(interp, objv[4], tree->selectCount - 1,
+			    &last) != TCL_OK) {
+			return TCL_ERROR;
+		    }
+		}
+		if (last >= tree->selectCount)
+		    last = tree->selectCount - 1;
+		if (first > last)
+		    break;
+
+		/* Build a list of selected items. */
+		TreeItemList_Init(tree, &items, tree->selectCount);
+		hPtr = Tcl_FirstHashEntry(&tree->selection, &search);
+		while (hPtr != NULL) {
+		    item = (TreeItem) Tcl_GetHashKey(&tree->selection, hPtr);
+		    TreeItemList_Append(&items, item);
+		    hPtr = Tcl_NextHashEntry(&search);
+		}
+
+		/* Sort it. */
+		TreeItemList_Sort(&items);
+
+		if (first == last) {
+		    item = TreeItemList_Nth(&items, first);
+		    Tcl_SetObjResult(interp, TreeItem_ToObj(tree, item));
+		} else {
+		    listObj = Tcl_NewListObj(0, NULL);
+		    for (index = first; index <= last; index++) {
+			item = TreeItemList_Nth(&items, index);
+			Tcl_ListObjAppendElement(interp, listObj,
+				TreeItem_ToObj(tree, item));
+		    }
+		    Tcl_SetObjResult(interp, listObj);
+		}
+
+		TreeItemList_Free(&items);
+		break;
+	    }
+#else /* SELECTION_VISIBLE */
+	    /* If any item may be selected, including orphans, then getting
+	     * a sorted list of selected items is impossible. */
 	    if (objc != 3) {
 		Tcl_WrongNumArgs(interp, 3, objv, (char *) NULL);
 		return TCL_ERROR;
 	    }
+#endif /* SELECTION_VISIBLE */
+
 	    if (tree->selectCount < 1)
 		break;
 	    listObj = Tcl_NewListObj(0, NULL);
diff --git a/generic/tkTreeCtrl.h b/generic/tkTreeCtrl.h
index d95e180..24d397b 100644
--- a/generic/tkTreeCtrl.h
+++ b/generic/tkTreeCtrl.h
@@ -7,7 +7,7 @@
  * Copyright (c) 2002-2003 Christian Krone
  * Copyright (c) 2003 ActiveState Corporation
  *
- * RCS: @(#) $Id: tkTreeCtrl.h,v 1.72 2006/11/12 05:47:35 treectrl Exp $
+ * RCS: @(#) $Id: tkTreeCtrl.h,v 1.73 2006/11/19 00:48:14 treectrl Exp $
  */
 
 #include "tkPort.h"
@@ -950,6 +950,7 @@ extern void TreePtrList_Free(TreePtrList *tilPtr);
 #define TreeItemList_Items(L) ((TreeItem *) (L)->pointers)
 #define TreeItemList_Nth(L,n) ((TreeItem) (L)->pointers[n])
 #define TreeItemList_Count(L) ((L)->count)
+extern void TreeItemList_Sort(TreeItemList *items);
 
 #define TreeColumnList_Init TreePtrList_Init
 #define TreeColumnList_Append TreePtrList_Append
diff --git a/generic/tkTreeItem.c b/generic/tkTreeItem.c
index 75300af..c23649d 100644
--- a/generic/tkTreeItem.c
+++ b/generic/tkTreeItem.c
@@ -5,7 +5,7 @@
  *
  * Copyright (c) 2002-2006 Tim Baker
  *
- * RCS: @(#) $Id: tkTreeItem.c,v 1.90 2006/11/18 04:35:55 treectrl Exp $
+ * RCS: @(#) $Id: tkTreeItem.c,v 1.91 2006/11/19 00:48:14 treectrl Exp $
  */
 
 #include "tkTreeCtrl.h"
@@ -6491,6 +6491,48 @@ ItemSortCmd(
 /*
  *----------------------------------------------------------------------
  *
+ * TreeItemList_Sort --
+ *
+ *	Sorts a list of items.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+TILSCompare(
+    CONST VOID *first_,
+    CONST VOID *second_
+    )
+{
+    TreeItem first = *(TreeItem *) first_;
+    TreeItem second = *(TreeItem *) second_;
+
+    return first->index - second->index;
+}
+
+void
+TreeItemList_Sort(
+    TreeItemList *items
+    )
+{
+    Tree_UpdateItemIndex(items->tree);
+
+    /* TkTable uses this, but mentions possible lack of thread-safety. */
+    qsort((VOID *) TreeItemList_Items(items),
+	    (size_t) TreeItemList_Count(items),
+	    sizeof(TreeItem),
+	    TILSCompare);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * ItemStateCmd --
  *
  *	This procedure is invoked to process the [item state] widget
-- 
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