From 18e9dca6ea12f3f01a28c08f4b596268d0322a4f Mon Sep 17 00:00:00 2001
From: jpbruyere <jp.bruyere@hotmail.com>
Date: Sun, 7 Jun 2015 11:42:04 +0200
Subject: [PATCH] Allow on child in stack to have streatching size, to occupy
 remaining space if stack size is fixed or stretched. Usefull in the case of
 spinner for example.

---
 Templates/Spinner.goml             |  6 ++--
 Tests/Interfaces/testSpinner.goml  |  2 +-
 src/GraphicObjects/GenericStack.cs | 47 ++++++++++++++++++++++++++++--
 3 files changed, 49 insertions(+), 6 deletions(-)

diff --git a/Templates/Spinner.goml b/Templates/Spinner.goml
index 8f61f0b1..c537f977 100755
--- a/Templates/Spinner.goml
+++ b/Templates/Spinner.goml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
-<Border CornerRadius="0" Margin="0" BorderWidth="1" Fit="True">
-	<HorizontalStack Name="hstack" Margin="0" Spacing="5">
-		<Label Width="30" Name="labCpt" Text="55" Margin="1" TextAlignment="RightCenter"/>
+<Border CornerRadius="0" Margin="0" BorderWidth="1" Width="0" Height="-1">
+	<HorizontalStack Name="hstack" Margin="0" Spacing="5" Width="0" Height="-1">
+		<Label Width="0" Name="labCpt" Text="55" Margin="1" TextAlignment="RightCenter"/>
 		<VerticalStack Spacing="1" Name="vstack">
 			<Button Width="10" Height="8" MouseClick="onUp">
 				<Image Margin="1" Path="#go.Images.Icons.updown.svg" SvgSub="up"/>
diff --git a/Tests/Interfaces/testSpinner.goml b/Tests/Interfaces/testSpinner.goml
index 12a72991..9767d546 100755
--- a/Tests/Interfaces/testSpinner.goml
+++ b/Tests/Interfaces/testSpinner.goml
@@ -2,5 +2,5 @@
 <Container Name="TopContainer" Width="400" Height="350"
 	Margin="20" Focusable="True" Background="DarkGray">
 
-	<Spinner Width="50"></Spinner>
+	<Spinner Width="100"></Spinner>
 </Container>
\ No newline at end of file
diff --git a/src/GraphicObjects/GenericStack.cs b/src/GraphicObjects/GenericStack.cs
index 5759bac4..63a70ad3 100644
--- a/src/GraphicObjects/GenericStack.cs
+++ b/src/GraphicObjects/GenericStack.cs
@@ -110,12 +110,55 @@ namespace go
 
 			if ((layoutType & (int)LayoutingType.PositionChildren) > 0)
 				Interface.LayoutingQueue.Enqueue (LayoutingType.PositionChildren, this);
+			
 		}
 		public override void UpdateLayout (LayoutingType layoutType)
         {            
-			if (layoutType == LayoutingType.PositionChildren)
+			if (layoutType == LayoutingType.PositionChildren) {
+				//allow 1 child to have size to 0 if stack has fixed or streched size,
+				//this child will occupy remaining space
+				if (Orientation == Orientation.Horizontal) {
+					if (Width >= 0) {
+						GraphicObject[] gobjs = Children.Where (c => c.Width == 0).ToArray();
+						if (gobjs.Length > 1)
+							throw new Exception ("Only one child in stack may have size to stretched");
+						else if (gobjs.Length == 1) {
+							int sz = Children.Except (gobjs).Sum (g => g.Slot.Width);
+							if (sz < Slot.Width) {
+								gobjs [0].Slot.Width = Slot.Width - sz - Spacing;
+								int idx = Children.IndexOf (gobjs [0]);
+								if (idx > 0 && idx < Children.Count - 1)
+									gobjs [0].Slot.Width -= Spacing;
+
+								if (gobjs [0].LastSlots.Width != gobjs [0].Slot.Width) {
+									gobjs [0].bmp = null;
+									gobjs [0].LastSlots.Width = gobjs [0].Slot.Width;
+								}
+							}
+						}
+					}					
+				} else {
+					if (Height >= 0) {
+						GraphicObject[] gobjs = Children.Where (c => c.Height == 0).ToArray();
+						if (gobjs.Length > 1)
+							throw new Exception ("Only one child in stack may have size to stretched");
+						else if (gobjs.Length == 1) {
+							int sz = Children.Except (gobjs).Sum (g => g.Slot.Height);
+							if (sz < Slot.Height) {
+								gobjs [0].Slot.Height = Slot.Height - sz;
+								int idx = Children.IndexOf (gobjs [0]);
+								if (idx > 0 && idx < Children.Count - 1)
+									gobjs [0].Slot.Height -= Spacing;
+								if (gobjs [0].LastSlots.Height != gobjs [0].Slot.Height) {
+									gobjs [0].bmp = null;
+									gobjs [0].LastSlots.Height = gobjs [0].Slot.Height;
+								}
+							}
+						}
+					}
+				}				
 				ComputeChildrenPositions ();
-			else
+			}else
 				base.UpdateLayout(layoutType);
         }
 		#endregion
-- 
2.47.3