From 921126b99a9e1ab00befb40d8f7f0c99728af698 Mon Sep 17 00:00:00 2001
From: jpbruyere <jp.bruyere@hotmail.com>
Date: Tue, 2 Feb 2016 23:38:54 +0100
Subject: [PATCH] Gradient, Bitmap and Svg Filling

---
 Crow.csproj                           |   5 +-
 Crow.userprefs                        |  14 +--
 Templates/ArrowButTemplate.crow       |   6 +-
 Templates/Button.crow                 |  15 ++-
 Templates/GroupBox.goml               |   2 +-
 Templates/ScrollBar.goml              |   3 +-
 Templates/Window.goml                 |   3 +-
 Tests/GOLIBTest_4.cs                  |   2 +-
 Tests/GOLIBTest_5.cs                  |   2 +-
 Tests/GOLIBTests.cs                   |  12 ++-
 Tests/Interfaces/0.crow               |   8 ++
 Tests/Interfaces/test2WayBinding.crow |  13 +++
 Tests/Interfaces/testBorder.goml      |   5 +-
 Tests/Interfaces/testButton.crow      |   2 +-
 Tests/Interfaces/testGroupBox.goml    |   9 +-
 Tests/Interfaces/testWindow.goml      |  20 ++--
 Tests/Tests.csproj                    |   9 +-
 Tests/image/crow0.svg                 |  18 ++++
 src/BmpPicture.cs                     |  36 +++++++
 src/Cairo/IFill.cs                    |  11 ---
 src/Colors.cs                         |  18 ++--
 src/Fill/Fill.cs                      |  32 +++++++
 src/Gradient.cs                       | 130 ++++++++++++++++++++++++++
 src/GraphicObjects/AnalogMeter.cs     |   2 +-
 src/GraphicObjects/Border.cs          |   8 +-
 src/GraphicObjects/GraduatedSlider.cs |   2 +-
 src/GraphicObjects/GraphicObject.cs   |  49 +++++-----
 src/GraphicObjects/Group.cs           |  10 +-
 src/GraphicObjects/Label.cs           |  24 +++--
 src/GraphicObjects/ProgressBar.cs     |   6 +-
 src/GraphicObjects/Slider.cs          |  40 ++++++--
 src/GraphicObjects/TextBox.cs         |   4 +-
 src/GraphicObjects/TextRun.cs         |   2 +-
 src/Picture.cs                        |   2 +-
 src/Point.cs                          |  15 ++-
 src/Rectangle.cs                      |   5 +-
 src/SolidColor.cs                     |  96 +++++++++++++++++++
 src/SvgPicture.cs                     |  32 +++++++
 38 files changed, 545 insertions(+), 127 deletions(-)
 create mode 100755 Tests/Interfaces/0.crow
 create mode 100755 Tests/Interfaces/test2WayBinding.crow
 create mode 100644 Tests/image/crow0.svg
 delete mode 100644 src/Cairo/IFill.cs
 create mode 100644 src/Fill/Fill.cs
 create mode 100644 src/Gradient.cs
 create mode 100644 src/SolidColor.cs

diff --git a/Crow.csproj b/Crow.csproj
index 498e7feb..3f655d17 100644
--- a/Crow.csproj
+++ b/Crow.csproj
@@ -130,7 +130,9 @@
     <Compile Include="src\GraphicObjects\GroupBox.cs" />
     <Compile Include="src\GraphicObjects\ScrollBar.cs" />
     <Compile Include="src\BubblingMouseButtonEventArgs.cs" />
-    <Compile Include="src\Cairo\IFill.cs" />
+    <Compile Include="src\SolidColor.cs" />
+    <Compile Include="src\Gradient.cs" />
+    <Compile Include="src\Fill\Fill.cs" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="System" />
@@ -164,6 +166,7 @@
     <Folder Include="Images\Icons\" />
     <Folder Include="src\CompilerServices\" />
     <Folder Include="src\OpenGL\" />
+    <Folder Include="src\Fill\" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="Images\Icons\updown.svg" />
diff --git a/Crow.userprefs b/Crow.userprefs
index f3fbc68e..cdb46ef8 100644
--- a/Crow.userprefs
+++ b/Crow.userprefs
@@ -1,15 +1,16 @@
 <Properties GitUserInfo="UsingGIT" StartupItem="Tests/Tests.csproj">
   <MonoDevelop.Ide.Workspace ActiveConfiguration="Debug|Linux_x86" />
-  <MonoDevelop.Ide.Workbench ActiveDocument="src/Colors.cs">
+  <MonoDevelop.Ide.Workbench ActiveDocument="Tests/Interfaces/testWindow.goml">
     <Files>
-      <File FileName="src/Colors.cs" Line="13" Column="32" />
+      <File FileName="Tests/Interfaces/testWindow.goml" Line="5" Column="35" />
+      <File FileName="src/GraphicObjects/Slider.cs" Line="1" Column="1" />
+      <File FileName="src/GraphicObjects/GraphicObject.cs" Line="1" Column="1" />
+      <File FileName="Tests/GOLIBTests.cs" Line="1" Column="1" />
+      <File FileName="src/Fill/Fill.cs" Line="1" Column="1" />
     </Files>
   </MonoDevelop.Ide.Workbench>
   <MonoDevelop.Ide.DebuggingService.Breakpoints>
-    <BreakpointStore>
-      <Breakpoint file="/mnt/data2/devel/GOLib/src/GraphicObjects/HorizontalStack.cs" line="26" column="1" />
-      <Breakpoint file="/mnt/data2/devel/GOLib/MonoDevelop.GOLib/src/GOLibNodeExtension.cs" line="99" column="1" />
-    </BreakpointStore>
+    <BreakpointStore />
   </MonoDevelop.Ide.DebuggingService.Breakpoints>
   <MonoDevelop.Ide.DebuggingService.PinnedWatches>
     <Watch file="../../src/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/Workbench.cs" line="1399" offsetX="14" offsetY="23383" expression="ex" liveUpdate="False" />
@@ -19,7 +20,6 @@
     <Watch file="src/XCursor.cs" line="51" offsetX="812" offsetY="409" expression="pos" liveUpdate="False" />
     <Watch file="src/OpenTKGameWindow.cs" line="234" offsetX="746" offsetY="1618" expression="lqi" liveUpdate="False" />
     <Watch file="src/GraphicObjects/GenericStack.cs" line="171" offsetX="447" offsetY="1717" expression="layoutType" liveUpdate="False" />
-    <Watch file="src/GraphicObjects/GraphicObject.cs" line="925" offsetX="695" offsetY="6851" expression="d.Method.Name" liveUpdate="False" />
     <Watch file="src/GraphicObjects/Combobox.cs" line="97" offsetX="750" offsetY="1303" expression="value" liveUpdate="False" />
     <Watch file="src/Interface.cs" line="217" offsetX="623" offsetY="3315" expression="es" liveUpdate="False" />
     <Watch file="src/Interface.cs" line="217" offsetX="623" offsetY="3339" expression="es.MemberName" liveUpdate="False" />
diff --git a/Templates/ArrowButTemplate.crow b/Templates/ArrowButTemplate.crow
index 94f717d7..099249c3 100755
--- a/Templates/ArrowButTemplate.crow
+++ b/Templates/ArrowButTemplate.crow
@@ -4,11 +4,11 @@
 	<Label Text="{../../Caption}" Height="80" Width="200"/>
 </HorizontalStack>-->
 <Border Name="Content"
-	Background="Gray" Foreground="DarkGray" 
+	Background="vgradient|0:White|0,2:Gray|0,9:Gray|1:Black" Foreground="DarkGray" 
 	Height="{../TemplatedHeight}" Width="{../TemplatedWidth}"
 	MouseEnter="{Foreground=White}"
 	MouseLeave="{Foreground=DarkGray}"
-	MouseDown="{Background=LightGray}"
-	MouseUp="{Background=Gray}"
+	MouseDown="{Background=vgradient|0:Black|0,1:Gray|0,9:Gray|1:White}"
+	MouseUp="{Background=vgradient|0:White|0,2:Gray|0,9:Gray|1:Black}"
 	>
 </Border>
\ No newline at end of file
diff --git a/Templates/Button.crow b/Templates/Button.crow
index d95244d5..9e6e541c 100755
--- a/Templates/Button.crow
+++ b/Templates/Button.crow
@@ -3,12 +3,17 @@
 	<Image Margin="2" Width="14" Height="14" Path="{../../Image}"  SvgSub="{../../SvgSub}"/>
 	<Label Text="{../../Caption}" Height="80" Width="200"/>
 </HorizontalStack>-->
-<Border Fit="True" Background="Gray" MinimumSize="50;20" Foreground="Gray" CornerRadius="3" 
-	MouseEnter="{Foreground=White;caption.Foreground=White}"
-	MouseLeave="{Foreground=Gray;caption.Foreground=Black}"
-	MouseDown="{Background=LightGray}"
-	MouseUp="{Background=Gray}"
+<Border Fit="True" Background="Gray" MinimumSize="50;20" 
+		Foreground="Transparent" CornerRadius="3" BorderWidth="1" 
+	MouseEnter="{Foreground=vgradient|0:White|0,2:Gray|0,9:Gray|1:Black;caption.Foreground=White}"
+	MouseLeave="{Foreground=Transparent;caption.Foreground=Black}"
+	MouseDown="{Foreground=vgradient|0:Black|0,05:Gray|0,85:Gray|1:White}"
+	MouseUp="{Foreground=vgradient|0:White|0,2:Gray|0,9:Gray|1:Black}"		    
 	>
+<!--
+	MouseDown="{Background=vgradient|0:Black|0,1:Gray|0,9:Gray|1:White}"
+	MouseUp="{Background=vgradient|0:White|0,1:Gray|0,9:Gray|1:Black}"
+-->
 <!--	<Image Height="0" Width="0" Margin="0" Path="{../../Image}" SvgSub="{../../SvgSub}"/>-->
 	<Label Name="caption" Margin="5" Foreground="Black" Text="{../../Caption}"/>
 </Border>
\ No newline at end of file
diff --git a/Templates/GroupBox.goml b/Templates/GroupBox.goml
index 4f6035aa..b92ee8b2 100755
--- a/Templates/GroupBox.goml
+++ b/Templates/GroupBox.goml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <Group Height="{../TemplatedHeight}" Width="{../TemplatedWidth}">
-	<Border CornerRadius="5" BorderWidth="1" Margin="6"
+	<Border CornerRadius="5" BorderWidth="1" Margin="6" Foreground="{../../Foreground}"
 		Height="{../../TemplatedHeight}" Width="{../../TemplatedWidth}">
 		<Container Name="Content" Margin="10"
 				Height="{../../../TemplatedHeight}" Width="{../../../TemplatedWidth}"/>
diff --git a/Templates/ScrollBar.goml b/Templates/ScrollBar.goml
index b279d09f..4734eea9 100755
--- a/Templates/ScrollBar.goml
+++ b/Templates/ScrollBar.goml
@@ -5,7 +5,8 @@
 			Template="#Crow.Templates.ArrowButTemplate.crow">
 			<Image Margin="1" Path="#Crow.Images.Icons.updown.svg" SvgSub="up"/>
 		</Button>
-		<Slider Name="Slider" Value="{../../../Scroll}" Maximum="{../../../MaximumScroll}" 
+		<Slider Name="Slider" Value="{../../../Scroll}" Maximum="{../../../MaximumScroll}"
+			Background="hgradient|0:Black|0,1:Gray|0,9:Gray|1:LightGray"
 			Width="{../../../TemplatedWidth}" Height="{../../../TemplatedHeight}" Orientation="{../../../Orientation}"
 			ValueChanged="../../../onSliderValueChange"/>
 		<Button MouseRepeat="true" Width="12" Height="8" MouseClick="../../../onScrollForth"
diff --git a/Templates/Window.goml b/Templates/Window.goml
index 42af9d90..dd3fec7d 100755
--- a/Templates/Window.goml
+++ b/Templates/Window.goml
@@ -2,7 +2,8 @@
 <Border BorderWidth="1" Foreground="White" CornerRadius="20" Height="{../TemplatedHeight}" Width="{../TemplatedWidth}">
 	<VerticalStack Height="{../../TemplatedHeight}" Width="{../../TemplatedWidth}">
 		<Border Name="TitleBar" BorderWidth="1" Foreground="White" Width="{../../../TemplatedWidth}" Height="-1" 
-				Background="0,1;0,5;1,0;0,5">
+				Background="vgradient|0:0,1;0,5;1,0;0,5|1:0,0;0,1;0,3;0,9">
+<!--				Background="0,1;0,5;1,0;0,5"-->
 			<HorizontalStack Name="hs" Margin="1" Spacing="1" Width="{../../../../TemplatedWidth}" Height="-1" >
 				<GraphicObject Width="5"/>
 				<Image Margin="1" Width="12" Height="12" Path="{../../../../../Icon}"/>
diff --git a/Tests/GOLIBTest_4.cs b/Tests/GOLIBTest_4.cs
index 56d020e6..e4a37b48 100644
--- a/Tests/GOLIBTest_4.cs
+++ b/Tests/GOLIBTest_4.cs
@@ -96,7 +96,7 @@ namespace test
 			//LoadInterface("golibtests/test4.xml", out c2);
 			//c2.HorizontalAlignment = HorizontalAlignment.Left;
 			//c2.VerticalAlignment = VerticalAlignment.Top;
-			c.Background.AdjustAlpha (0.5);
+			//((Color)c.Background).AdjustAlpha (0.5);
 //			labMousePos = c.FindByName ("labMouse") as Label;
 //			//pb = c.FindByName("pbBar") as ProgressBar;
 //			pb2 = c.FindByName("pbBar2") as ProgressBar;
diff --git a/Tests/GOLIBTest_5.cs b/Tests/GOLIBTest_5.cs
index 873a21ea..664483be 100644
--- a/Tests/GOLIBTest_5.cs
+++ b/Tests/GOLIBTest_5.cs
@@ -44,7 +44,7 @@ namespace test
 				l.Text = cpt.ToString ();
 			}
 			foreach (GraphicObject o in gl) {
-				Color a = o.Background;
+				Color a = (Color)o.Background;
 				if (a.A > 1)
 					a.A = 0;
 				else
diff --git a/Tests/GOLIBTests.cs b/Tests/GOLIBTests.cs
index a1c8f413..3a198fcb 100644
--- a/Tests/GOLIBTests.cs
+++ b/Tests/GOLIBTests.cs
@@ -36,11 +36,15 @@ namespace test
 		int frameCpt = 0;
 		int idx = 0;
 		string[] testFiles = {
-			"testTextBox.crow",
-			"testSpinner.goml",
-			"testImage.crow",
+			"testBorder.goml",
+			"testGroupBox.goml",
+			"test2WayBinding.crow",
 			"testButton.crow",
+			"0.crow",
+			"testSpinner.goml",
 			"fps.goml",
+			"testTextBox.crow",
+			"testImage.crow",
 			"test4.goml",
 			"testScrollbar.goml",
 			"2.crow",
@@ -49,7 +53,6 @@ namespace test
 //			"testCombobox.goml",
 			"testWindow3.goml",
 			"testWindow.goml",
-			"testGroupBox.goml",
 			"testExpandable.goml",
 			"testCheckbox.goml",
 			"testPopper.goml",
@@ -58,7 +61,6 @@ namespace test
 //			"testSpinner.goml",
 			"testRadioButton2.goml",
 			"testContainer.goml",
-			"testBorder.goml",
 			"testRadioButton.goml",
 			"testMsgBox.goml",
 			"testGrid.goml",
diff --git a/Tests/Interfaces/0.crow b/Tests/Interfaces/0.crow
new file mode 100755
index 00000000..aa72d58a
--- /dev/null
+++ b/Tests/Interfaces/0.crow
@@ -0,0 +1,8 @@
+<?xml version="1.0"?>
+<Border BorderWidth="2" Width="200" Height="200" Foreground="Gray" Margin="10"
+	Background="Green"
+	MouseEnter="{Background=White;Foreground=White}"
+	MouseLeave="{Background=Green;Foreground=Gray}"	
+	>
+	<GraphicObject  Width="100" Height="100" Background="Red" Margin="10"/>
+</Border>
\ No newline at end of file
diff --git a/Tests/Interfaces/test2WayBinding.crow b/Tests/Interfaces/test2WayBinding.crow
new file mode 100755
index 00000000..f4f03be7
--- /dev/null
+++ b/Tests/Interfaces/test2WayBinding.crow
@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<VerticalStack Fit="True">
+	<TextBox Margin="2" Name="tb1" Width="300" Height="50" Font="droid,16" 
+		Text="{../tb2.Text}"
+		CurColumn="{../tb2.CurrentLine}"
+		CurLine="{../tb2.CurrentLine}"
+		/>
+	<TextBox Margin="2" Name="tb2" Width="300" Height="50" Font="droid,16"
+		Text="{../tb1.Text}"
+		CurColumn="{../tb1.CurrentLine}"
+		CurLine="{../tb1.CurrentLine}"
+		/>
+</VerticalStack>
\ No newline at end of file
diff --git a/Tests/Interfaces/testBorder.goml b/Tests/Interfaces/testBorder.goml
index 02f16257..cae3c33d 100755
--- a/Tests/Interfaces/testBorder.goml
+++ b/Tests/Interfaces/testBorder.goml
@@ -1,4 +1,5 @@
 <?xml version="1.0"?>
-<Border BorderWidth="5" Width="200" Height="200" CornerRadius="20" Margin="0" Background="Mantis">
-	<GraphicObject CornerRadius="0" Background="CornflowerBlue" Height="100" Width="100"/>
+<Border BorderWidth="2" Width="200" Height="200" CornerRadius="2" Margin="0" 
+		Background="vgradient|0,65:Mantis|1:Transparent">
+	<GraphicObject CornerRadius="20" Background="#Tests.image.crow0.svg" Margin="0" Height="100" Width="120" />
 </Border>
diff --git a/Tests/Interfaces/testButton.crow b/Tests/Interfaces/testButton.crow
index 5e4c5a5c..fd52bce4 100755
--- a/Tests/Interfaces/testButton.crow
+++ b/Tests/Interfaces/testButton.crow
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<VerticalStack Fit="true">
+<VerticalStack Fit="true" Background="vgradient|0:DimGray|1:Black">
 	<HorizontalStack Fit="True">
 		<Button Caption="but" MouseClick="onButClick"/>
 		<Button MouseClick="onButClick"/>
diff --git a/Tests/Interfaces/testGroupBox.goml b/Tests/Interfaces/testGroupBox.goml
index c12c597e..6b14f829 100755
--- a/Tests/Interfaces/testGroupBox.goml
+++ b/Tests/Interfaces/testGroupBox.goml
@@ -1,4 +1,7 @@
 <?xml version="1.0"?>
-<GroupBox Width="-1" Height="-1" Background="Red">
-<Label/>
-</GroupBox>
+<Container Background="vgradient|0:DarkGray|1:DimGray">
+	<GroupBox Width="200" Height="150" Background="vgradient|0:SteelBlue|1:Transparent"
+		Foreground="ogradient|0:White|1:Black">
+	<!--	<Label/>-->
+	</GroupBox>
+</Container>
diff --git a/Tests/Interfaces/testWindow.goml b/Tests/Interfaces/testWindow.goml
index 4b215be4..7fa41b43 100755
--- a/Tests/Interfaces/testWindow.goml
+++ b/Tests/Interfaces/testWindow.goml
@@ -2,7 +2,7 @@
 <Window Left="10" Top="10" Title="Test window" 
 		Width="250" Height="550" >
 	<VerticalStack Name="contentVSStack" Margin="10" Spacing="10" Background="0,4;0,4;0,4;0,4">
-		<Slider Name="slider" Height="10" Width="0"/>
+		<Slider Name="slider" Height="12" Width="0" CornerRadius="3"/>
 		<GroupBox Caption="test"  Height="-1" Width="-1" Margin="5">
 			<VerticalStack  Height="-1" Width="0" >
 				<RadioButton  Caption="Radio 1" Background="Red" />
@@ -10,7 +10,8 @@
 				<RadioButton  Caption="Radio 3" />
 			</VerticalStack>
 		</GroupBox>
-		<HorizontalStack Width="0" Height="-1" Margin="10" Background="BlueCrayola">
+		<HorizontalStack Width="0" Height="-1" Margin="10" CornerRadius="5" 
+				Background="vgradient|0:White|0,1:SteelBlue|0,9:SteelBlue|1:Transparent">
 			<CheckBox Height="-1" Width="80"/>
 			<GraphicObject Width="0"/>
 			<CheckBox Height="-1" Width="80" IsChecked="true"/>
@@ -21,23 +22,28 @@
 			<VerticalStack Fit="true" Name="vsFps"  Spacing="10" >
 				<HorizontalStack Fit="true">
 					<Label Text="Update:" Width="50" TextAlignment="RightCenter"/>
-					<Label Name="labUpdate" Text="{update}" Font="droid,12" Background="AoEnglish" Width="50" TextAlignment="Center"/>
+					<Label Name="labUpdate" Text="{update}" Font="droid,12" Width="50" TextAlignment="Center"
+						Background="vgradient|0:AoEnglish|1:Black"/>
 				</HorizontalStack>
 				<HorizontalStack Fit="true">
 					<Label Text="Drawing:" Width="50" TextAlignment="RightCenter"/>
-					<Label Name="labDrawing" Text="{drawing}" Font="droid,12" Background="AoEnglish" Width="50" TextAlignment="Center"/>
+					<Label Name="labDrawing" Text="{drawing}" Font="droid,12" Width="50" TextAlignment="Center"
+						Background="vgradient|0:AoEnglish|1:Black"/>
 				</HorizontalStack>
 				<HorizontalStack Fit="true">
 					<Label Name="captionFps" Text="Fps:" Width="50" TextAlignment="RightCenter"/>
-					<Label Name="valueFps" Text="{fps}" Font="droid , 12" Width="50" TextAlignment="Center" Background="AoEnglish"/>
+					<Label Name="valueFps" Text="{fps}" Font="droid , 12" Width="50" TextAlignment="Center" 
+						Background="vgradient|0:AoEnglish|1:Black"/>
 				</HorizontalStack>
 				<HorizontalStack Fit="true">
 					<Label Text="Min:" Width="50" TextAlignment="RightCenter"/>
-					<Label Text="{fpsMin}" Font="droid , 12" Width="50" TextAlignment="Center" Background="AoEnglish"/>
+					<Label Text="{fpsMin}" Font="droid , 12" Width="50" TextAlignment="Center"
+						Background="vgradient|0:AoEnglish|1:Black"/>
 				</HorizontalStack>
 				<HorizontalStack Fit="true">
 					<Label Text="Max:" Width="50" TextAlignment="RightCenter"/>
-					<Label Text="{fpsMax}" Font="droid , 12" Background="AoEnglish" Width="50" TextAlignment="Center"/>
+					<Label Text="{fpsMax}" Font="droid , 12" Width="50" TextAlignment="Center"
+						Background="vgradient|0:AoEnglish|1:Black"/>
 				</HorizontalStack>
 			</VerticalStack>				
 	</Container>
diff --git a/Tests/Tests.csproj b/Tests/Tests.csproj
index a987e902..e0c3f14c 100644
--- a/Tests/Tests.csproj
+++ b/Tests/Tests.csproj
@@ -45,7 +45,6 @@
     <Reference Include="Mono.Cairo" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="GOLIBTest_5.cs" />
     <Compile Include="GOLIBTest_4.cs" />
     <Compile Include="GOLIBTest_Listbox.cs" />
     <Compile Include="GOLIBTest_0.cs" />
@@ -203,6 +202,13 @@
     <None Include="Interfaces\testTextBox.crow">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Include="GOLIBTest_5.cs" />
+    <None Include="Interfaces\0.crow">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="Interfaces\test2WayBinding.crow">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Interfaces\" />
@@ -212,6 +218,7 @@
     <EmbeddedResource Include="image\tetra.png" />
     <EmbeddedResource Include="image\folder0.svg" />
     <EmbeddedResource Include="image\folder1.svg" />
+    <EmbeddedResource Include="image\crow0.svg" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Crow.csproj">
diff --git a/Tests/image/crow0.svg b/Tests/image/crow0.svg
new file mode 100644
index 00000000..72ea6af7
--- /dev/null
+++ b/Tests/image/crow0.svg
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+<svg xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" id="svg2" version="1.1" inkscape:version="0.47 r22583" width="749.44373" height="527.6217" sodipodi:docname="Carrion_crow_20090612.png">
+  <metadata id="metadata8">
+    <rdf:RDF>
+      <cc:Work rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/>
+        <dc:title/>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs id="defs6">
+    <inkscape:perspective sodipodi:type="inkscape:persp3d" inkscape:vp_x="0 : 0.5 : 1" inkscape:vp_y="0 : 1000 : 0" inkscape:vp_z="1 : 0.5 : 1" inkscape:persp3d-origin="0.5 : 0.33333333 : 1" id="perspective10"/>
+  </defs>
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-0.5899,-0.58997 -1.2476,-0.88561 -1.4615,-0.65699 -0.2139,0.22862 -0.1063,0.51659 0.2392,0.63992 0.3455,0.12334 0.5298,0.38333 0.4096,0.57776 -0.1201,0.19443 0.2549,0.38916 0.8335,0.43274 l 1.0519,0.0792 -1.0727,-1.07267 z M 418.60003,464.08713 c 0,-0.1213 0.225,-0.3596 0.5,-0.5295 0.275,-0.17 0.5,-0.071 0.5,0.2205 0,0.2912 -0.225,0.5295 -0.5,0.5295 -0.275,0 -0.5,-0.099 -0.5,-0.2205 z M 695.96553,23.479655 c 0.3385,-0.13696 1.0135,-0.1453 1.5,-0.0186 0.4864,0.12677 0.2095,0.23883 -0.6155,0.24902 -0.825,0.0102 -1.2231,-0.0935 -0.8845,-0.2305 z" id="path2818"/>
+</svg>
\ No newline at end of file
diff --git a/src/BmpPicture.cs b/src/BmpPicture.cs
index 879329aa..fc227747 100644
--- a/src/BmpPicture.cs
+++ b/src/BmpPicture.cs
@@ -61,6 +61,42 @@ namespace Crow
 			bitmap.UnlockBits (data);           
 		}
 
+		#region implemented abstract members of Fill
+
+		public override void SetAsSource (Context ctx, Rectangle bounds = default(Rectangle))
+		{
+			float widthRatio = 1f;
+			float heightRatio = 1f;
+
+			if (Scaled){
+				widthRatio = (float)bounds.Width / Dimensions.Width;
+				heightRatio = (float)bounds.Height / Dimensions.Height;
+			}
+
+			if (KeepProportions) {
+				if (widthRatio < heightRatio)
+					heightRatio = widthRatio;
+				else
+					widthRatio = heightRatio;
+			}
+
+			using (ImageSurface tmp = new ImageSurface (Format.Argb32, bounds.Width, bounds.Height)) {
+				using (Cairo.Context gr = new Context (tmp)) {
+					gr.Translate (bounds.Left, bounds.Top);
+					gr.Scale (widthRatio, heightRatio);
+					gr.Translate ((bounds.Width/widthRatio - Dimensions.Width)/2, (bounds.Height/heightRatio - Dimensions.Height)/2);
+
+					using (ImageSurface imgSurf = new ImageSurface (image, Format.Argb32, 
+						Dimensions.Width, Dimensions.Height, 4 * Dimensions.Width)) {
+						gr.SetSourceSurface (imgSurf, 0,0);
+						gr.Paint ();
+					}
+				}
+				ctx.SetSource (tmp);
+			}				
+		}
+		#endregion
+
 		public override void Paint (Cairo.Context gr, Rectangle rect, string subPart = "")
 		{
 			float widthRatio = 1f;
diff --git a/src/Cairo/IFill.cs b/src/Cairo/IFill.cs
deleted file mode 100644
index e3459bb0..00000000
--- a/src/Cairo/IFill.cs
+++ /dev/null
@@ -1,11 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace Crow
-{
-	public interface ICairoFill
-	{
-		void SetAsSource (Cairo.Context ctx);
-	}
-}
-
diff --git a/src/Colors.cs b/src/Colors.cs
index c88e1729..ccc42493 100644
--- a/src/Colors.cs
+++ b/src/Colors.cs
@@ -10,7 +10,7 @@ using System.Diagnostics;
 
 namespace Crow
 {
-	public struct Color : ICairoFill
+	public struct Color
     {
 		#region CTOR
 		public Color(double _R, double _G, double _B, double _A)
@@ -63,7 +63,6 @@ namespace Crow
 						return cr;
 				}
 			}
-
 			return new Color(
 				double.Parse(c[0]),
 				double.Parse(c[1]),
@@ -92,6 +91,10 @@ namespace Crow
         {
             return new Cairo.Color(c.R, c.G, c.B, c.A);
         }
+		public static implicit operator Fill(Color c){
+			return new SolidColor (c) as Fill;
+		}
+
 
 		public static bool operator ==(Color left, Color right)
 		{
@@ -147,16 +150,7 @@ namespace Crow
 		{
 			return new Color (this.R, this.G, this.B, _A);
 		}
-
-		#region IFill implementation
-
-		public void SetAsSource (Cairo.Context ctx)
-		{
-			ctx.SetSourceRGBA (R, G, B, A);
-		}
-
-		#endregion
-
+			
 		#region Predefined colors
         public static readonly Color Transparent = new Color(0, 0, 0, 0, "Transparent");
 		public static readonly Color Clear = new Color(-1, -1, -1, -1, "Clear");
diff --git a/src/Fill/Fill.cs b/src/Fill/Fill.cs
new file mode 100644
index 00000000..322fa5ae
--- /dev/null
+++ b/src/Fill/Fill.cs
@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+
+namespace Crow
+{
+	public abstract class Fill
+	{
+		public abstract void SetAsSource (Cairo.Context ctx, Rectangle bounds = default(Rectangle));
+		public static object Parse (string s){
+			if (string.IsNullOrEmpty (s))
+				return null;
+			if (s.Substring (1).StartsWith ("gradient"))
+				return (Gradient)Gradient.Parse (s);
+			if (s.EndsWith (".svg", true, System.Globalization.CultureInfo.InvariantCulture))
+				return SvgPicture.Parse (s);
+			if (s.EndsWith (".png", true, System.Globalization.CultureInfo.InvariantCulture) ||
+			    s.EndsWith (".jpg", true, System.Globalization.CultureInfo.InvariantCulture) ||
+			    s.EndsWith (".jpeg", true, System.Globalization.CultureInfo.InvariantCulture) ||
+			    s.EndsWith (".bmp", true, System.Globalization.CultureInfo.InvariantCulture) ||
+			    s.EndsWith (".gif", true, System.Globalization.CultureInfo.InvariantCulture))
+				return BmpPicture.Parse (s);
+			
+			return (SolidColor)SolidColor.Parse (s);
+		}
+
+		public static implicit operator Fill(Color c){
+			return new SolidColor (c);
+		}
+
+	}
+}
+
diff --git a/src/Gradient.cs b/src/Gradient.cs
new file mode 100644
index 00000000..c521fd67
--- /dev/null
+++ b/src/Gradient.cs
@@ -0,0 +1,130 @@
+//
+//  Gradient.cs
+//
+//  Author:
+//       Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
+//
+//  Copyright (c) 2016 jp
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+using System;
+using System.Collections.Generic;
+
+namespace Crow
+{
+	public class Gradient : Fill
+	{
+		public enum Type
+		{
+			Vertical,
+			Horizontal,
+			Oblic,
+			Radial
+		}
+		public class ColorStop
+		{
+			public double Offset;
+			public Color Color;
+
+			public ColorStop(double offset, Color color){ 
+				Offset = offset;
+				Color = color;
+			}
+			public static object Parse(string s)
+			{
+				if (string.IsNullOrEmpty (s))
+					return null;
+				
+				string[] parts = s.Trim ().Split (':');
+
+				if (parts.Length > 2)
+					throw new Exception ("too many parameters in color stop: " + s);
+				
+				if (parts.Length == 2)
+					return new ColorStop (double.Parse (parts [0]), (Color)parts [1]);
+
+				return new ColorStop (-1, (Color)parts [0]);
+			}
+		}
+		public Gradient.Type GradientType = Type.Vertical;
+//		public double x0;
+//		public double y0;
+//		public double x1;
+//		public double y1;
+//		public double Radius1;
+//		public double Radius2;
+		public List<ColorStop> Stops = new List<ColorStop>();
+		public Gradient(Gradient.Type _type)
+		{
+			GradientType = _type;
+		}
+
+		#region implemented abstract members of Fill
+
+		public override void SetAsSource (Cairo.Context ctx, Rectangle bounds = default(Rectangle))
+		{
+			Cairo.Gradient grad = null;
+			switch (GradientType) {
+			case Type.Vertical:
+				grad = new Cairo.LinearGradient (bounds.Left, bounds.Top, bounds.Left, bounds.Bottom);
+				break;
+			case Type.Horizontal:
+				grad = new Cairo.LinearGradient (bounds.Left, bounds.Top, bounds.Right, bounds.Top);
+				break;
+			case Type.Oblic:
+				grad = new Cairo.LinearGradient (bounds.Left, bounds.Top, bounds.Right, bounds.Bottom);
+				break;
+			case Type.Radial:
+				throw new NotImplementedException ();
+			}
+
+			foreach (ColorStop cs in Stops)
+				grad.AddColorStop (cs.Offset, cs.Color);
+			
+			ctx.SetSource (grad);
+			grad.Dispose ();
+		}
+		#endregion
+
+		public static object Parse(string s)
+		{
+			if (string.IsNullOrEmpty (s))
+				return Color.White;
+
+			Crow.Gradient tmp;
+
+			string[] stops = s.Trim ().Split ('|');
+
+			switch (stops[0].Trim()) {
+			case "vgradient":
+				tmp = new Gradient (Type.Vertical);
+				break;
+			case "hgradient":
+				tmp = new Gradient (Type.Horizontal);
+				break;
+			case "ogradient":
+				tmp = new Gradient (Type.Oblic);
+				break;
+			default:
+				throw new Exception ("Unknown gradient type: " + stops [0]);
+			}
+
+			for (int i = 1; i < stops.Length; i++)
+				tmp.Stops.Add((ColorStop)ColorStop.Parse(stops[i]));
+
+			return tmp;
+		}
+	}
+}
+
diff --git a/src/GraphicObjects/AnalogMeter.cs b/src/GraphicObjects/AnalogMeter.cs
index 39e012dd..80e0e850 100644
--- a/src/GraphicObjects/AnalogMeter.cs
+++ b/src/GraphicObjects/AnalogMeter.cs
@@ -34,7 +34,7 @@ namespace Crow
 			gr.Translate (-m.X, -m.Y);
 
 			gr.LineWidth = 2;
-			gr.Color = Foreground;
+			Foreground.SetAsSource (gr);
 			gr.MoveTo (m.X,0.0);
 			gr.LineTo (m.X, -m.Y*0.5);
 			gr.Stroke ();
diff --git a/src/GraphicObjects/Border.cs b/src/GraphicObjects/Border.cs
index c04a135e..58ccff33 100644
--- a/src/GraphicObjects/Border.cs
+++ b/src/GraphicObjects/Border.cs
@@ -25,7 +25,7 @@ namespace Crow
 			}
 		}
 		[XmlAttributeAttribute()][DefaultValue("White")]
-		public override Color Foreground {
+		public override Fill Foreground {
 			get { return base.Foreground;}
 			set {base.Foreground = value;}
 		}
@@ -52,13 +52,13 @@ namespace Crow
 			if (BorderWidth > 0) 
 				rBack.Inflate (-BorderWidth / 2);			
 
-			gr.SetSourceColor(Background);
-			CairoHelpers.CairoRectangle(gr,rBack,CornerRadius);
+			Background.SetAsSource (gr, rBack);
+			CairoHelpers.CairoRectangle(gr, rBack, CornerRadius);
 			gr.Fill ();
 
 			if (BorderWidth > 0) {
 				gr.LineWidth = BorderWidth;
-				gr.SetSourceColor(Foreground);
+				Foreground.SetAsSource (gr, rBack);
 				CairoHelpers.CairoRectangle(gr, rBack, CornerRadius);
 				gr.Stroke ();
 			}
diff --git a/src/GraphicObjects/GraduatedSlider.cs b/src/GraphicObjects/GraduatedSlider.cs
index 3d916a8c..b7a181e0 100644
--- a/src/GraphicObjects/GraduatedSlider.cs
+++ b/src/GraphicObjects/GraduatedSlider.cs
@@ -25,7 +25,7 @@ namespace Crow
 		protected override void DrawGraduations(Context gr, PointD pStart, PointD pEnd)
 		{
 			Rectangle r = ClientRectangle;
-			gr.SetSourceColor(Foreground);
+			Foreground.SetAsSource (gr);
 
 			gr.LineWidth = 2;
 			gr.MoveTo(pStart);
diff --git a/src/GraphicObjects/GraphicObject.cs b/src/GraphicObjects/GraphicObject.cs
index 5613c0c9..7fd0e1ca 100644
--- a/src/GraphicObjects/GraphicObject.cs
+++ b/src/GraphicObjects/GraphicObject.cs
@@ -66,8 +66,8 @@ namespace Crow
 		#region private fields
 		ILayoutable _parent;
 		string _name = "unamed";
-		Color _background = Color.Transparent;
-		Color _foreground = Color.White;
+		Fill _background = Color.Transparent;
+		Fill _foreground = Color.White;
 		Font _font = "droid, 10";
 		double _cornerRadius = 0;
 		int _margin = 0;
@@ -79,9 +79,6 @@ namespace Crow
 		HorizontalAlignment _horizontalAlignment = HorizontalAlignment.Center;
 		Size _maximumSize = "0;0";
 		Size _minimumSize = "0;0";
-
-		Picture _backgroundImage;
-		string _backgroundImagePath;
 		#endregion
 
 		#region public fields
@@ -278,7 +275,7 @@ namespace Crow
 			}
 		} 
 		[XmlAttributeAttribute()][DefaultValue("Transparent")]
-		public virtual Color Background {
+		public virtual Fill Background {
 			get { return _background; }
 			set {
 				if (_background == value)
@@ -289,7 +286,7 @@ namespace Crow
 			}
 		} 
 		[XmlAttributeAttribute()][DefaultValue("White")]
-		public virtual Color Foreground {
+		public virtual Fill Foreground {
 			get { return _foreground; }
 			set {
 				if (_foreground == value)
@@ -415,7 +412,6 @@ namespace Crow
 							name = xaa.AttributeName;
 						continue;
 					}
-
 					XmlIgnoreAttribute xia = o as XmlIgnoreAttribute;
 					if (xia != null)
 						continue;
@@ -707,7 +703,7 @@ namespace Crow
 		{
 			Rectangle rBack = new Rectangle (Slot.Size);
 
-			Background.SetAsSource (gr);
+			Background.SetAsSource (gr, rBack);
 			CairoHelpers.CairoRectangle(gr,rBack,_cornerRadius);
 			gr.Fill ();
 		}
@@ -747,12 +743,15 @@ namespace Crow
 			Rectangle rb = Parent.ContextCoordinates(Slot);
 
 			using (ImageSurface source = new ImageSurface(bmp, Format.Argb32, Slot.Width, Slot.Height, 4 * Slot.Width)) {
-				if (this.Background == Color.Clear) {
-					ctx.Save ();
-					ctx.Operator = Operator.Clear;
-					ctx.Rectangle(rb);
-					ctx.Fill ();
-					ctx.Restore ();
+				//TODO:improve equality test for basic color and Fill
+				if (this.Background is SolidColor) {					
+					if ((this.Background as SolidColor).Equals(Color.Clear)) {
+						ctx.Save ();
+						ctx.Operator = Operator.Clear;
+						ctx.Rectangle (rb);
+						ctx.Fill ();
+						ctx.Restore ();
+					}
 				}
 				ctx.SetSourceSurface (source, rb.X, rb.Y);
 				ctx.Paint ();
@@ -1146,16 +1145,16 @@ namespace Crow
 					il.Emit(OpCodes.Ldstr,strcst);
 
 				}else{
-					//search for a static field in left operand type named 'rop name'
-					FieldInfo ropFi = lopT.GetField (rop, BindingFlags.Static|BindingFlags.Public);
-					if (ropFi != null)
-					{
-						il.Emit (OpCodes.Ldsfld, ropFi);
-					}else{
-						//search if parsing methods are present
-						MethodInfo lopTryParseMi = lopT.GetMethod("TryParse");
-						//TODO
-					}
+					if (lopT.IsEnum)
+						throw new NotImplementedException();
+						
+					MethodInfo lopParseMi = lopT.GetMethod("Parse");
+					if (lopParseMi == null)
+						throw new Exception (string.Format
+							("GOML:no parse method found in: {0}", lopT.Name));	
+					il.Emit(OpCodes.Ldstr, rop);
+					il.Emit(OpCodes.Callvirt, lopParseMi);
+					il.Emit(OpCodes.Unbox_Any, lopT);
 				}
 
 				#endregion
diff --git a/src/GraphicObjects/Group.cs b/src/GraphicObjects/Group.cs
index e03399e9..087cd38d 100644
--- a/src/GraphicObjects/Group.cs
+++ b/src/GraphicObjects/Group.cs
@@ -188,8 +188,9 @@ namespace Crow
 		protected override void onDraw (Context gr)
 		{
 			Rectangle rBack = new Rectangle (Slot.Size);
-			gr.SetSourceColor(Background);
-			CairoHelpers.CairoRectangle(gr,rBack,CornerRadius);
+
+			Background.SetAsSource (gr, rBack);
+			CairoHelpers.CairoRectangle(gr, rBack, CornerRadius);
 			gr.Fill ();
 
 			foreach (GraphicObject g in Children) {
@@ -225,9 +226,10 @@ namespace Crow
 						clip.clearAndClip (gr);
 
 						Rectangle rBack = Slot.Size;
-						gr.SetSourceColor(Background);
-						CairoHelpers.CairoRectangle(gr,rBack,CornerRadius);
+						Background.SetAsSource (gr, rBack);
+						CairoHelpers.CairoRectangle(gr, rBack, CornerRadius);
 						gr.Fill ();
+
 						#if DEBUG_CLIP_RECTANGLE
 						clip.stroke (gr, Color.Amaranth.AdjustAlpha (0.8));
 						#endif
diff --git a/src/GraphicObjects/Label.cs b/src/GraphicObjects/Label.cs
index 0b93924a..ee7dd045 100644
--- a/src/GraphicObjects/Label.cs
+++ b/src/GraphicObjects/Label.cs
@@ -106,7 +106,7 @@ namespace Crow
 
 				this.registerForGraphicUpdate ();
 				this.RegisterForLayouting ((int)LayoutingType.Sizing);
-				NotifyValueChanged ("Text", Text);
+				NotifyValueChanged ("Text", _text);
             }
         }
 		[XmlAttributeAttribute()][DefaultValue(false)]
@@ -122,7 +122,8 @@ namespace Crow
 				registerForGraphicUpdate();
 			}
 		}
-		[XmlIgnore]public int CurrentColumn{
+		[XmlAttributeAttribute()][DefaultValue(0)]
+		public int CurrentColumn{
 			get { return _currentCol; }
 			set { 
 				if (value == _currentCol)
@@ -136,7 +137,8 @@ namespace Crow
 				NotifyValueChanged ("CurrentColumn", _currentCol);
 			}
 		}
-		[XmlIgnore]public int CurrentLine{
+		[XmlAttributeAttribute()][DefaultValue(0)]
+		public int CurrentLine{
 			get { return _currentLine; }
 			set { 
 				if (value == _currentLine)
@@ -150,7 +152,9 @@ namespace Crow
 				NotifyValueChanged ("CurrentLine", _currentLine);
 			}
 		}
-		[XmlIgnore]public Point SelBegin {
+		//TODO:using HasFocus for drawing selection cause SelBegin and Release binding not to work
+		[XmlAttributeAttribute()][DefaultValue("-1")]
+		public Point SelBegin {
 			get {
 				return _selBegin;
 			}
@@ -158,10 +162,12 @@ namespace Crow
 				if (value == _selBegin)
 					return;
 				_selBegin = value;
+				NotifyValueChanged ("SelBegin", _selBegin);
 				NotifyValueChanged ("SelectedText", SelectedText);
 			}
 		}			
-		[XmlIgnore]public Point SelRelease {
+		[XmlAttributeAttribute()][DefaultValue("-1")]
+		public Point SelRelease {
 			get {
 				return _selRelease;
 			}
@@ -169,6 +175,7 @@ namespace Crow
 				if (value == _selRelease)
 					return;
 				_selRelease = value;
+				NotifyValueChanged ("SelRelease", _selRelease);
 				NotifyValueChanged ("SelectedText", SelectedText);
 			}
 		}
@@ -228,6 +235,7 @@ namespace Crow
 					CurrentColumn = lines [CurrentLine].Count ();
 					lines [CurrentLine] += lines [CurrentLine + 1];
 					lines.RemoveAt (CurrentLine + 1);
+					NotifyValueChanged ("Text", Text);
 					return;
 				}
 				CurrentColumn--;
@@ -251,6 +259,7 @@ namespace Crow
 				SelBegin = -1;
 				SelRelease = -1;
 			}
+			NotifyValueChanged ("Text", Text);
 		}
 		/// <summary>
 		/// Insert new string at caret position, should be sure no line break is inside.
@@ -260,6 +269,7 @@ namespace Crow
 		{
 			lines [CurrentLine] = lines [CurrentLine].Insert (CurrentColumn, str);
 			CurrentColumn += str.Length;
+			NotifyValueChanged ("Text", Text);
 		}
 
 		#region GraphicObject overrides
@@ -483,7 +493,7 @@ namespace Crow
 
 			if (HasFocus )
 			{
-				gr.SetSourceColor(Foreground);
+				Foreground.SetAsSource (gr);
 				gr.LineWidth = 1.5;
 				gr.MoveTo(new PointD(textCursorPos + rText.X, rText.Y + CurrentLine * fe.Height));
 				gr.LineTo(new PointD(textCursorPos + rText.X, rText.Y + (CurrentLine + 1) * fe.Height));
@@ -535,7 +545,7 @@ namespace Crow
 				if (string.IsNullOrWhiteSpace (l))
 					continue;
 
-				gr.SetSourceColor(Foreground);	
+				Foreground.SetAsSource (gr);	
 				gr.MoveTo (lineRect.X, rText.Y + fe.Ascent + fe.Height * i);
 
 				#if _WIN32 || _WIN64
diff --git a/src/GraphicObjects/ProgressBar.cs b/src/GraphicObjects/ProgressBar.cs
index c8dcbb77..c8165353 100644
--- a/src/GraphicObjects/ProgressBar.cs
+++ b/src/GraphicObjects/ProgressBar.cs
@@ -68,7 +68,7 @@ namespace Crow
 
 		#region GraphicObject overrides
 		[XmlAttributeAttribute()][DefaultValue("Gray")]
-		public override Color Background {
+		public override Fill Background {
 			get { return base.Background; }
 			set { base.Background = value; }
 		}
@@ -78,7 +78,7 @@ namespace Crow
 			set { base.BorderWidth = value; }
 		}
 		[XmlAttributeAttribute()][DefaultValue("BlueCrayola")]
-		public override Color Foreground {
+		public override Fill Foreground {
 			get { return base.Foreground; }
 			set { base.Foreground = value; }
 		}
@@ -94,7 +94,7 @@ namespace Crow
 
 			rBack.Width = (int)((double)rBack.Width / Maximum * Value);
 
-			gr.SetSourceColor(Foreground);
+			Foreground.SetAsSource (gr, rBack);
 
 			CairoHelpers.CairoRectangle(gr,rBack,CornerRadius);
 			gr.Fill();
diff --git a/src/GraphicObjects/Slider.cs b/src/GraphicObjects/Slider.cs
index a931934a..f21202a8 100644
--- a/src/GraphicObjects/Slider.cs
+++ b/src/GraphicObjects/Slider.cs
@@ -32,7 +32,7 @@ namespace Crow
 		#region private fields
         Rectangle cursor;
 		int _cursorSize;
-		Color _cursorColor;
+		Fill _cursorColor;
 		Orientation _orientation;
 		bool holdCursor = false;
 		#endregion
@@ -40,33 +40,47 @@ namespace Crow
 		protected double unity;
 
 		#region Public properties
-		[XmlAttributeAttribute()][DefaultValue("BlueGray")]
-		public virtual Color CursorColor {
+		[XmlAttributeAttribute()][DefaultValue("vgradient|0:White|0,1:SteelBlue|0,9:SteelBlue|1:DimGray")]
+		public virtual Fill CursorColor {
 			get { return _cursorColor; }
 			set {
+				if (_cursorColor == value)
+					return;
 				_cursorColor = value;
 				registerForGraphicUpdate ();
+				NotifyValueChanged ("CursorColor", _cursorColor);
 			}
 		}
 		[XmlAttributeAttribute()][DefaultValue(20)]
 		public virtual int CursorSize {
 			get { return _cursorSize; }
 			set {
+				if (_cursorSize == value)
+					return;
 				_cursorSize = value;
+				RegisterForLayouting ((int)LayoutingType.Sizing);
 				registerForGraphicUpdate ();
+				NotifyValueChanged ("CursorSize", _cursorSize);
 			}
 		}
 		[XmlAttributeAttribute()][DefaultValue(Orientation.Horizontal)]
 		public virtual Orientation Orientation
 		{
 			get { return _orientation; }
-			set { _orientation = value; }
+			set { 
+				if (_orientation == value)
+					return;
+				_orientation = value; 
+
+				RegisterForLayouting ((int)LayoutingType.All);
+				NotifyValueChanged ("Orientation", _orientation);
+			}
 		}
 		#endregion
 		[XmlAttributeAttribute()][DefaultValue(10.0)]
 		public override double Maximum {
 			get { return base.Maximum; }
-			set {
+			set {				
 				if (value == base.Maximum)
 					return;
 				base.Maximum = value;
@@ -75,12 +89,18 @@ namespace Crow
 
 			}
 		}
+
 		#region GraphicObject Overrides
-		[XmlAttributeAttribute()][DefaultValue("Gray")]
-		public override Color Background {
+		[XmlAttributeAttribute()][DefaultValue("vgradient|0:Black|0,1:Gray|0,9:Gray|1:LightGray")]
+		public override Fill Background {
 			get { return base.Background; }
 			set { base.Background = value; }
 		}
+		[XmlAttributeAttribute()][DefaultValue("Gray")]
+		public override Fill Foreground {
+			get { return base.Foreground; }
+			set { base.Foreground = value; }
+		}
 		[XmlAttributeAttribute()][DefaultValue(true)]
 		public override bool Focusable
 		{
@@ -120,7 +140,7 @@ namespace Crow
 
 		protected virtual void DrawGraduations(Context gr, PointD pStart, PointD pEnd)
 		{
-			gr.SetSourceColor(Foreground);
+			Foreground.SetAsSource (gr);
 
 			gr.LineWidth = 1;
 			gr.MoveTo(pStart);
@@ -131,9 +151,9 @@ namespace Crow
 		}
 		protected virtual void DrawCursor(Context gr, Rectangle _cursor)
 		{
-			gr.SetSourceColor(CursorColor);
+			CursorColor.SetAsSource (gr, _cursor);
 			CairoHelpers.CairoRectangle (gr, _cursor, CornerRadius);
-			gr.FillPreserve();
+			gr.Fill();
 		}
 
         void computeCursorPosition()
diff --git a/src/GraphicObjects/TextBox.cs b/src/GraphicObjects/TextBox.cs
index 6af75f1e..d9003b61 100644
--- a/src/GraphicObjects/TextBox.cs
+++ b/src/GraphicObjects/TextBox.cs
@@ -45,12 +45,12 @@ namespace Crow
 			set { base.Focusable = value; }
 		}
 		[XmlAttributeAttribute()][DefaultValue("White")]
-		public override Color Background {
+		public override Fill Background {
 			get { return base.Background; }
 			set { base.Background = value; }
 		}
 		[XmlAttributeAttribute()][DefaultValue("Black")]
-		public override Color Foreground {
+		public override Fill Foreground {
 			get { return base.Foreground; }
 			set { base.Foreground = value; }
 		}
diff --git a/src/GraphicObjects/TextRun.cs b/src/GraphicObjects/TextRun.cs
index 1c539c67..bee580b3 100644
--- a/src/GraphicObjects/TextRun.cs
+++ b/src/GraphicObjects/TextRun.cs
@@ -313,7 +313,7 @@ namespace Crow
 						continue;
 					}
 
-					gr.SetSourceColor (Foreground);	
+					Foreground.SetAsSource (gr);	
 					gr.MoveTo (rText.X, rText.Y + fe.Ascent + fe.Height * curLineCount);
 
 					#if _WIN32 || _WIN64
diff --git a/src/Picture.cs b/src/Picture.cs
index c1d83061..6e928e6c 100644
--- a/src/Picture.cs
+++ b/src/Picture.cs
@@ -24,7 +24,7 @@ using Cairo;
 
 namespace Crow
 {
-	public abstract class Picture
+	public abstract class Picture : Fill
 	{
 		public string Path;
 		public Size Dimensions;
diff --git a/src/Point.cs b/src/Point.cs
index 369cf01d..76beaa99 100644
--- a/src/Point.cs
+++ b/src/Point.cs
@@ -130,7 +130,7 @@ namespace Crow
 
         public override string ToString()
         {
-            return string.Format("({0},{1})", X, Y);
+			return string.Format("({0};{1})", X, Y);
         }
 
         public override bool Equals(object obj)
@@ -141,6 +141,19 @@ namespace Crow
         {
             return base.GetHashCode();
         }
+		public static Point Parse(string s)
+		{
+			if (string.IsNullOrEmpty (s))
+				return default(Point);
+			string[] d = s.Trim().Split(';');
+			if (d.Length == 2)
+				return new Point (int.Parse (d [0]), int.Parse (d [1]));
+			else if (d.Length == 1) {
+				int tmp = int.Parse (d [0]);
+				return new Point (tmp, tmp);
+			}
+			throw new Exception ("Crow.Point Parsing Error: " + s);
+		}
     }
 
 }
diff --git a/src/Rectangle.cs b/src/Rectangle.cs
index ea410ff3..c0b98520 100644
--- a/src/Rectangle.cs
+++ b/src/Rectangle.cs
@@ -233,10 +233,7 @@ namespace Crow
             }
         }
 
-        public static Rectangle Zero
-        {
-            get { return new Rectangle(0, 0, 0, 0); }
-        }
+		public static readonly Rectangle Zero = new Rectangle(0, 0, 0, 0);
         public static Rectangle Empty
         {
             get { return Zero; }
diff --git a/src/SolidColor.cs b/src/SolidColor.cs
new file mode 100644
index 00000000..7a1178cc
--- /dev/null
+++ b/src/SolidColor.cs
@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Xml.Serialization;
+using System.Reflection;
+using System.Diagnostics;
+
+
+
+namespace Crow
+{
+	public class SolidColor : Fill
+    {
+		Color color = Color.Transparent;
+		#region CTOR
+		public SolidColor(Color c)
+		{
+			color = c;
+		}
+		#endregion
+
+		#region implemented abstract members of Fill
+
+		public override void SetAsSource (Cairo.Context ctx, Rectangle bounds = default(Rectangle))
+		{
+			ctx.SetSourceRGBA (color.R, color.G, color.B, color.A);
+		}
+		public static object Parse(string s)
+		{
+			return new SolidColor((Color)s);
+		}
+		#endregion
+
+		#region Operators
+        public static implicit operator Color(SolidColor c)
+        {
+			return c.color;
+        }
+		public static implicit operator SolidColor(Color c)
+		{
+			return new SolidColor (c);
+		}
+		public static bool operator ==(SolidColor left, SolidColor right)
+		{
+			return left.color == right.color ? true : false;
+		}
+		public static bool operator !=(SolidColor left, SolidColor right)
+		{
+			return left.color == right.color ? false : true;
+
+		}
+		public override bool Equals (object obj)
+		{
+			if (obj is Crow.Color)
+				return color == (Color)obj;
+			if (obj is SolidColor)
+				return color == (obj as SolidColor).color;
+			return false;			
+		}
+//		public static bool operator ==(SolidColor c, string n)
+//		{
+//			return c.color.Name == n ? true : false;
+//		}
+//		public static bool operator !=(SolidColor c, string n)
+//		{
+//			return c.color.Name == n ? false : true;
+//		}
+//		public static bool operator ==(string n, SolidColor c)
+//		{
+//			return c.color.Name == n ? true : false;
+//		}
+//		public static bool operator !=(string n, SolidColor c)
+//		{
+//			return c.color.Name == n ? false : true;
+//		}
+		public static SolidColor operator *(SolidColor c, Double f)
+		{
+			return new SolidColor(new Color(c.color.R,c.color.G,c.color.B,c.color.A * f));
+		}
+		public static SolidColor operator +(SolidColor c1, SolidColor c2)
+		{
+			return new SolidColor(new Color(c1.color.R + c2.color.R,c1.color.G + c2.color.G,c1.color.B + c2.color.B,c1.color.A + c2.color.A));
+		}
+		public static SolidColor operator -(SolidColor c1, SolidColor c2)
+		{
+			return new SolidColor(new Color(c1.color.R - c2.color.R,c1.color.G - c2.color.G,c1.color.B - c2.color.B,c1.color.A - c2.color.A));
+		}
+		#endregion				        
+
+		public override string ToString()
+		{
+			return color.ToString ();
+		}
+    }
+}
diff --git a/src/SvgPicture.cs b/src/SvgPicture.cs
index 38781a1c..25531c9b 100644
--- a/src/SvgPicture.cs
+++ b/src/SvgPicture.cs
@@ -41,6 +41,38 @@ namespace Crow
 				Dimensions = new Size (hSVG.Dimensions.Width, hSVG.Dimensions.Height);
 			}
 		}
+
+		#region implemented abstract members of Fill
+
+		public override void SetAsSource (Context ctx, Rectangle bounds = default(Rectangle))
+		{
+			float widthRatio = 1f;
+			float heightRatio = 1f;
+
+			if (Scaled){
+				widthRatio = (float)bounds.Width / Dimensions.Width;
+				heightRatio = (float)bounds.Height / Dimensions.Height;
+			}
+
+			if (KeepProportions) {
+				if (widthRatio < heightRatio)
+					heightRatio = widthRatio;
+				else
+					widthRatio = heightRatio;
+			}
+
+			using (ImageSurface tmp = new ImageSurface (Format.Argb32, bounds.Width, bounds.Height)) {
+				using (Cairo.Context gr = new Context (tmp)) {
+					gr.Translate (bounds.Left, bounds.Top);
+					gr.Scale (widthRatio, heightRatio);
+					gr.Translate ((bounds.Width/widthRatio - Dimensions.Width)/2, (bounds.Height/heightRatio - Dimensions.Height)/2);
+
+					hSVG.RenderCairo (gr);
+				}
+				ctx.SetSource (tmp);
+			}	
+		}
+		#endregion
 			
 		public override void Paint (Cairo.Context gr, Rectangle rect, string subPart = "")
 		{
-- 
2.47.3