Support to Color.Default

- This change allow to set color as Color.Defalut.
-

Change-Id: Ieae82112b0609cac17808d8fc41a9d2db0d102ed

6 files changed, 190 insertions, 11 deletions

diff --git a/ElmSharp.Test/ElmSharp.Test.csproj b/ElmSharp.Test/ElmSharp.Test.csproj
index 22fb426..832a052 100755..100644
--- a/ElmSharp.Test/ElmSharp.Test.csproj
+++ b/ElmSharp.Test/ElmSharp.Test.csproj
@@ -45,6 +45,7 @@
     <Compile Include="TC\BackgroundTest3.cs" />
     <Compile Include="TC\BoxLayoutTest1.cs" />
     <Compile Include="TC\BoxTest1.cs" />
+    <Compile Include="TC\BackgroundColorTest1.cs" />
     <Compile Include="TC\ButtonTest1.cs" />
     <Compile Include="TC\CalendarTest1.cs" />
     <Compile Include="TC\CheckTest1.cs" />
diff --git a/ElmSharp.Test/TC/BackgroundColorTest1.cs b/ElmSharp.Test/TC/BackgroundColorTest1.cs
new file mode 100644
index 0000000..c8073f3
--- /dev/null
+++ b/ElmSharp.Test/TC/BackgroundColorTest1.cs
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the License);
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using System;
+using ElmSharp;
+
+namespace ElmSharp.Test
+{
+    class BackgroundColorTest1 : TestCaseBase
+    {
+        public override string TestName => "BackgroundColorTest1";
+        public override string TestDescription => "To test basic operation of Widget's background Color";
+
+        
+
+        public override void Run(Window window)
+        {
+            Button button1 = new Button(window) {
+                Text = "Target Button",
+            };
+            button1.Resize(window.ScreenSize.Width, 100);
+            button1.Move(0, 0);
+            button1.Show();
+
+            Label label1 = new Label(window) {
+                Text = button1.BackgroundColor.ToString(),
+                BackgroundColor = Color.Black,
+                Color = Color.White
+            };
+            label1.Resize(window.ScreenSize.Width, 100);
+            label1.Move(0, 100);
+            label1.Show();
+
+            Button button2 = new Button(window) {
+                Text = "Set Color.Red",
+                BackgroundColor = Color.Red,
+            };
+            button2.Clicked += (e, o) =>
+            {
+                button1.BackgroundColor = Color.Red;
+                label1.Text = button1.BackgroundColor.ToString();
+            };
+            button2.Resize(window.ScreenSize.Width, 100);
+            button2.Move(0, 400);
+            button2.Show();
+
+            Button button3 = new Button(window) {
+                Text = "Set Color(125,200,255, 150)",
+                BackgroundColor = new Color(125,200,255, 150)
+            };
+            button3.Clicked += (e, o) =>
+            {
+                button1.BackgroundColor = button3.BackgroundColor;
+                label1.Text = button1.BackgroundColor.ToString();
+            };
+            button3.Resize(window.ScreenSize.Width, 100);
+            button3.Move(0, 500);
+            button3.Show();
+
+            Button button4 = new Button(window) {
+                Text = "Set Color(125, 200, 255, 10)",
+                BackgroundColor = new Color(125, 200, 255, 10)
+            };
+            button4.Clicked += (e,o) =>
+            {
+                button1.BackgroundColor = button4.BackgroundColor;
+                label1.Text = button1.BackgroundColor.ToString();
+            };
+            button4.Resize(window.ScreenSize.Width, 100);
+            button4.Move(0, 600);
+            button4.Show();
+
+            Button button5 = new Button(window) {
+                Text = "Set Color.Default",
+                BackgroundColor = Color.Default
+            };
+            button5.Clicked += (e, o) =>
+            {
+                button1.BackgroundColor = button5.BackgroundColor;
+                label1.Text = button1.BackgroundColor.ToString();
+            };
+            button5.Resize(window.ScreenSize.Width, 100);
+            button5.Move(0, 700);
+            button5.Show();
+        }
+
+    }
+}
diff --git a/ElmSharp/ElmSharp/Button.cs b/ElmSharp/ElmSharp/Button.cs
index 2292074..0b8edec 100644
--- a/ElmSharp/ElmSharp/Button.cs
+++ b/ElmSharp/ElmSharp/Button.cs
@@ -107,8 +107,17 @@ namespace ElmSharp
         {
             set
             {
-                SetPartColor("bg", value);
-                SetPartColor("bg_pressed", value);
+                if (value.IsDefault)
+                {
+                    EdjeObject.DeleteColorClass("button/bg");
+                    EdjeObject.DeleteColorClass("button/bg_pressed");
+                }
+                else
+                {
+                    SetPartColor("bg", value);
+                    SetPartColor("bg_pressed", value);
+                }
+                _backgroundColor = value;
             }
         }
 
diff --git a/ElmSharp/ElmSharp/Color.cs b/ElmSharp/ElmSharp/Color.cs
index aba4410..f1730a3 100644
--- a/ElmSharp/ElmSharp/Color.cs
+++ b/ElmSharp/ElmSharp/Color.cs
@@ -26,6 +26,24 @@ namespace ElmSharp
         readonly int _g;
         readonly int _b;
 
+        readonly Mode _mode;
+
+        enum Mode
+        {
+            Default,
+            Rgb
+        }
+
+        public static Color Default
+        {
+            get { return new Color(-1, -1, -1, -1, Mode.Default); }
+        }
+
+        public bool IsDefault
+        {
+            get { return _mode == Mode.Default; }
+        }
+
         public int A
         {
             get { return _a; }
@@ -50,12 +68,24 @@ namespace ElmSharp
         {
         }
 
-        public Color(int r, int g, int b, int a)
+        public Color(int r, int g, int b, int a) : this(r,g,b,a, Mode.Rgb)
+        {
+        }
+
+        Color(int r, int g, int b, int a, Mode mode)
         {
-            _r = Clamp(r, 0, 255);
-            _g = Clamp(g, 0, 255);
-            _b = Clamp(b, 0, 255);
-            _a = Clamp(a, 0, 255);
+            _mode = mode;
+            if (mode == Mode.Rgb)
+            {
+                _r = Clamp(r, 0, 255);
+                _g = Clamp(g, 0, 255);
+                _b = Clamp(b, 0, 255);
+                _a = Clamp(a, 0, 255);
+            }
+            else // Default
+            {
+                _r = _g = _b = _a = -1;
+            }
         }
 
         public override int GetHashCode()
@@ -78,6 +108,8 @@ namespace ElmSharp
 
         static bool EqualsInner(Color color1, Color color2)
         {
+            if (color1._mode == Mode.Default && color2._mode == Mode.Default)
+				return true;
             return color1._r == color2._r && color1._g == color2._g && color1._b == color2._b && color1._a == color2._a;
         }
 
diff --git a/ElmSharp/ElmSharp/Layout.cs b/ElmSharp/ElmSharp/Layout.cs
index c1678d9..4ae1fa6 100644
--- a/ElmSharp/ElmSharp/Layout.cs
+++ b/ElmSharp/ElmSharp/Layout.cs
@@ -63,6 +63,23 @@ namespace ElmSharp
             Interop.Elementary.elm_layout_file_set(Handle, file, group);
         }
 
+        public override Color BackgroundColor
+        {
+            set
+            {
+                if(value.IsDefault)
+                {
+                    string part = ClassName.ToLower().Replace("elm_", "") + "/" + "bg";
+                    EdjeObject.DeleteColorClass(part);
+                }
+                else
+                {
+                    SetPartColor("bg", value);
+                }
+                _backgroundColor = value;
+            }
+        }
+
         protected override IntPtr CreateHandle(EvasObject parent)
         {
             return Interop.Elementary.elm_layout_add(parent.Handle);
diff --git a/ElmSharp/ElmSharp/Widget.cs b/ElmSharp/ElmSharp/Widget.cs
index f7a7833..d258145 100644
--- a/ElmSharp/ElmSharp/Widget.cs
+++ b/ElmSharp/ElmSharp/Widget.cs
@@ -26,6 +26,8 @@ namespace ElmSharp
         SmartEvent _focused;
         SmartEvent _unfocused;
 
+        internal Color _backgroundColor = Color.Default;
+
         protected Widget()
         {
         }
@@ -91,13 +93,23 @@ namespace ElmSharp
         {
             get
             {
-                int r, g, b, a;
-                Interop.Elementary.elm_object_color_class_color_get(Handle, "bg", out r, out g, out b, out a);
-                return new Color((int)(r/(a/255.0)), (int)(g/(a/255.0)), (int)(b/(a/255.0)), a);
+                if(!_backgroundColor.IsDefault)
+                {
+                    _backgroundColor = GetPartColor("bg");
+                }
+                return _backgroundColor;
             }
             set
             {
-                SetPartColor("bg", value);
+                if (value.IsDefault)
+                {
+                    Console.WriteLine("Widget instance doesn't support to set BackgroundColor to Color.Default.");
+                }
+                else
+                {
+                    SetPartColor("bg", value);
+                    _backgroundColor = value;
+                }
             }
         }
 
@@ -156,6 +168,13 @@ namespace ElmSharp
                                                                               color.A);
         }
 
+        public Color GetPartColor(string part)
+        {
+            int r, g, b, a;
+            Interop.Elementary.elm_object_color_class_color_get(Handle, part, out r, out g, out b, out a);
+            return new Color((int)(r / (a / 255.0)), (int)(g / (a / 255.0)), (int)(b / (a / 255.0)), a);
+        }
+
         internal IntPtr GetPartContent(string part)
         {
             return Interop.Elementary.elm_object_part_content_get(Handle, part);