Support density independent pixel

 - Support Enable/Disable of this feature
 - By default, it was disabled. if you want enabling DP support feature,
   Use Forms.Init(FormsApplication application, bool useDeviceIndependentPixel) API
 - Hard-coded pixel value was changed to DP units
 - If you deal with native coordinate, use Forms.ConvertToScaledPixel / Forms.ConvertToScaledDP
 - If you convert hard-coded DP to pixels, use Forms.ConvertToPixel
 - Update font size convert formula

Change-Id: I345115551e1c37d27b8a7152af5ef847d035c9a4

1 files changed, 18 insertions, 23 deletions

diff --git a/Xamarin.Forms.Platform.Tizen/Renderers/VisualElementRenderer.cs b/Xamarin.Forms.Platform.Tizen/Renderers/VisualElementRenderer.cs
index 4bde705c..37a5fafb 100644
--- a/Xamarin.Forms.Platform.Tizen/Renderers/VisualElementRenderer.cs
+++ b/Xamarin.Forms.Platform.Tizen/Renderers/VisualElementRenderer.cs
@@ -9,7 +9,6 @@ using ERect = ElmSharp.Rect;
 using ERectangle = ElmSharp.Rectangle;
 using Specific = Xamarin.Forms.PlatformConfiguration.TizenSpecific.VisualElement;
 
-
 namespace Xamarin.Forms.Platform.Tizen
 {
 	/// <summary>
@@ -138,21 +137,26 @@ namespace Xamarin.Forms.Platform.Tizen
 			}
 			else
 			{
-				int availableWidth = ToNativeDimension(widthConstraint);
-				int availableHeight = ToNativeDimension(heightConstraint);
-				ESize measured;
+				int availableWidth = Forms.ConvertToScaledPixel(widthConstraint);
+				int availableHeight = Forms.ConvertToScaledPixel(heightConstraint);
+
+				if (availableWidth < 0)
+					availableWidth = int.MaxValue;
+				if (availableHeight < 0)
+					availableHeight = int.MaxValue;
 
+				Size measured;
 				var nativeViewMeasurable = NativeView as Native.IMeasurable;
 				if (nativeViewMeasurable != null)
 				{
-					measured = nativeViewMeasurable.Measure(availableWidth, availableHeight);
+					measured = nativeViewMeasurable.Measure(availableWidth, availableHeight).ToDP();
 				}
 				else
 				{
-					measured = Measure(availableWidth, availableHeight);
+					measured = Measure(availableWidth, availableHeight).ToDP();
 				}
 
-				return new SizeRequest(new Size(measured.Width, measured.Height), MinimumSize());
+				return new SizeRequest(measured, MinimumSize());
 			}
 		}
 
@@ -203,7 +207,7 @@ namespace Xamarin.Forms.Platform.Tizen
 		{
 			var x = ComputeAbsoluteX(Element);
 			var y = ComputeAbsoluteY(Element);
-			NativeView.Geometry = new ERect(ToNativeDimension(x), ToNativeDimension(y), ToNativeDimension(Element.Width), ToNativeDimension(Element.Height));
+			NativeView.Geometry = new Rectangle(x, y, Element.Width, Element.Height).ToPixel();
 			ApplyTransformation();
 			UpdateOpacityLayer();
 		}
@@ -545,7 +549,8 @@ namespace Xamarin.Forms.Platform.Tizen
 		protected void DoLayout(Native.LayoutEventArgs e)
 		{
 			Settings.StartIgnoringBatchCommitted();
-			Element.Layout(new Rectangle(Element.X, Element.Y, e.Width, e.Height));
+
+			Element.Layout(new Rectangle(Element.X, Element.Y, Forms.ConvertToScaledDP(e.Width), Forms.ConvertToScaledDP(e.Height)));
 			if (e.HasChanged)
 			{
 				UpdateLayout();
@@ -579,24 +584,14 @@ namespace Xamarin.Forms.Platform.Tizen
 			}
 		}
 
-		/// <summary>
-		/// Converts provided value to native dimension.
-		/// </summary>
-		/// <param name="v">value to be converted.</param>
-		/// <returns>converted value</returns>
-		protected static int ToNativeDimension(double v)
-		{
-			return (int)Math.Round(v);
-		}
-
 		static double ComputeAbsoluteX(VisualElement e)
 		{
-			return e.X + (e.RealParent is VisualElement ? Platform.GetRenderer(e.RealParent).NativeView.Geometry.X : 0.0);
+			return e.X + (e.RealParent is VisualElement ? Forms.ConvertToScaledDP(Platform.GetRenderer(e.RealParent).NativeView.Geometry.X) : 0.0);
 		}
 
 		static double ComputeAbsoluteY(VisualElement e)
 		{
-			return e.Y + (e.RealParent is VisualElement ? Platform.GetRenderer(e.RealParent).NativeView.Geometry.Y : 0.0);
+			return e.Y + (e.RealParent is VisualElement ? Forms.ConvertToScaledDP(Platform.GetRenderer(e.RealParent).NativeView.Geometry.Y) : 0.0);
 		}
 
 		/// <summary>
@@ -830,8 +825,8 @@ namespace Xamarin.Forms.Platform.Tizen
 
 		void ApplyTranslation(EvasMap map, ERect geometry, ref bool changed)
 		{
-			var shiftX = ToNativeDimension(Element.TranslationX);
-			var shiftY = ToNativeDimension(Element.TranslationY);
+			var shiftX = Forms.ConvertToScaledPixel(Element.TranslationX);
+			var shiftY = Forms.ConvertToScaledPixel(Element.TranslationY);
 
 			// apply translation, i.e. move/shift the object a little
 			if (shiftX != 0 || shiftY != 0)