From 0f0ac6a527d7ed2998ac1312188e3c803398bbad Mon Sep 17 00:00:00 2001
From: Timo Taipalus <abad.flt@gmail.com>
Date: Wed, 9 Mar 2016 14:16:22 +0200
Subject: [PATCH 1/3] selectTab - checks for illegal index value

Don't send illegal index value to object list and
cause exception, just output error to console instead
---
 src/dlangui/widgets/tabs.d | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/dlangui/widgets/tabs.d b/src/dlangui/widgets/tabs.d
index d1c0f109..e5599fb0 100644
--- a/src/dlangui/widgets/tabs.d
+++ b/src/dlangui/widgets/tabs.d
@@ -557,6 +557,10 @@ class TabControl : WidgetGroupDefaultDrawing {
     }
 
     void selectTab(int index, bool updateAccess) {
+        if (index < 0 || index + 1 >= _children.count) {
+            Log.e("Tried to access tab out of bounds (index = %d, count = %d)",index,_children.count-1);
+            return;
+        }
         if (_children.get(index + 1).compareId(_selectedTabId))
             return; // already selected
         string previousSelectedTab = _selectedTabId;

From e89b684274cf9ad158b9bf1f051479af57fb6a56 Mon Sep 17 00:00:00 2001
From: Timo Taipalus <abad.flt@gmail.com>
Date: Wed, 9 Mar 2016 14:31:15 +0200
Subject: [PATCH 2/3] logger: using writefln to allow formatted strings

---
 src/dlangui/core/logger.d | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dlangui/core/logger.d b/src/dlangui/core/logger.d
index 7fc22700..877e1ed3 100644
--- a/src/dlangui/core/logger.d
+++ b/src/dlangui/core/logger.d
@@ -144,7 +144,7 @@ class Log {
         if (logLevel >= level && logFile !is null && logFile.isOpen) {
             SysTime ts = Clock.currTime();
             logFile.writef("%04d-%02d-%02d %02d:%02d:%02d.%03d %s  ", ts.year, ts.month, ts.day, ts.hour, ts.minute, ts.second, ts.fracSecs.split!("msecs").msecs, logLevelName(level));
-            logFile.writeln(args);
+            logFile.writefln(args);
             logFile.flush();
         }
     }

From 1be3c329d789d32394939acbecc9aa2e41063647 Mon Sep 17 00:00:00 2001
From: Timo Taipalus <abad.flt@gmail.com>
Date: Wed, 9 Mar 2016 14:43:46 +0200
Subject: [PATCH 3/3] fixes to tab initialization

automatically select the first added tab as the
default and hide the widgets from subsequently
added tabs.
---
 src/dlangui/widgets/tabs.d | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/dlangui/widgets/tabs.d b/src/dlangui/widgets/tabs.d
index e5599fb0..9173edb5 100644
--- a/src/dlangui/widgets/tabs.d
+++ b/src/dlangui/widgets/tabs.d
@@ -646,6 +646,7 @@ class TabHost : FrameLayout, TabHandler {
         assert(widget.id !is null, "ID for tab host page is mandatory");
         assert(_children.indexOf(id) == -1, "duplicate ID for tab host page");
         _tabControl.addTab(widget.id, label, iconId, enableCloseButton);
+        tabInitialization(widget);
         //widget.focusGroup = true; // doesn't allow move focus outside of tab content
         addChild(widget);
         return this;
@@ -656,9 +657,21 @@ class TabHost : FrameLayout, TabHandler {
         assert(widget.id !is null, "ID for tab host page is mandatory");
         assert(_children.indexOf(id) == -1, "duplicate ID for tab host page");
         _tabControl.addTab(widget.id, labelResourceId, iconId, enableCloseButton);
+        tabInitialization(widget);
         addChild(widget);
         return this;
     }
+
+    // handles initial tab selection & hides subsequently added tabs so
+    // they don't appear in the same frame
+    private void tabInitialization(Widget widget) {
+        if(_tabControl.selectedTabId is null) {
+            selectTab(_tabControl.tab(0).id,false);
+        } else {
+            widget.visibility = Visibility.Invisible;
+        }
+    }
+    
     /// select tab
     void selectTab(string ID, bool updateAccess) {
         int index = _tabControl.tabIndex(ID);