From f55d72c5a536ba78040dcb39869e4a76802c3dd4 Mon Sep 17 00:00:00 2001
From: Vadim Lopatin <coolreader.org@gmail.com>
Date: Tue, 19 Sep 2017 14:20:48 +0300
Subject: [PATCH] expand all / collapse all - fix #448

---
 src/dlangui/widgets/tree.d | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/dlangui/widgets/tree.d b/src/dlangui/widgets/tree.d
index 2cae1a6d..66b1d8ea 100644
--- a/src/dlangui/widgets/tree.d
+++ b/src/dlangui/widgets/tree.d
@@ -185,6 +185,24 @@ class TreeItem {
     void collapse() {
         _expanded = false;
     }
+    /// expand this node and all children
+    void expandAll() {
+        foreach(c; _children) {
+            if (!c._expanded && c.canCollapse) //?
+                c.expandAll();
+        }
+        if (!expanded)
+            toggleExpand(this);
+    }
+    /// expand this node and all children
+    void collapseAll() {
+        foreach(c; _children) {
+            if (c._expanded && c.canCollapse)
+                c.collapseAll();
+        }
+        if (expanded)
+            toggleExpand(this);
+    }
 
     @property TreeItem selectedItem() {
         return root.selectedItem();