ADT/Layoutlib: 2 color, linear gradient support.

Change-Id: Ifaafa4fc42a22f4851449a7c35a5b82e211aafe7

8 files changed, 92 insertions, 56 deletions

diff --git a/tools/layoutlib/bridge/src/android/graphics/BitmapShader.java b/tools/layoutlib/bridge/src/android/graphics/BitmapShader.java
index 8bf7fcc..6453fdb 100644
--- a/tools/layoutlib/bridge/src/android/graphics/BitmapShader.java
+++ b/tools/layoutlib/bridge/src/android/graphics/BitmapShader.java
@@ -16,6 +16,8 @@
 
 package android.graphics;
 
+import java.awt.Paint;
+
 public class BitmapShader extends Shader {
 
     // we hold on just for the GC, since our native counterpart is using it
@@ -31,11 +33,16 @@ public class BitmapShader extends Shader {
     public BitmapShader(Bitmap bitmap, TileMode tileX, TileMode tileY) {
         mBitmap = bitmap;
     }
-    
+
     //---------- Custom methods
-    
+
     public Bitmap getBitmap() {
         return mBitmap;
     }
+
+    @Override
+    Paint getPaint() {
+        return null;
+    }
 }
 
diff --git a/tools/layoutlib/bridge/src/android/graphics/Canvas.java b/tools/layoutlib/bridge/src/android/graphics/Canvas.java
index 02e3220..9851ae3 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Canvas.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Canvas.java
@@ -125,13 +125,16 @@ public class Canvas extends _Original_Canvas {
         }
 
         Shader shader = paint.getShader();
-        if (shader instanceof LinearGradient) {
-            g.setPaint(((LinearGradient)shader).getPaint());
-        } else {
-            if (mLogger != null && shader != null) {
-                mLogger.warning(String.format(
-                        "Shader '%1$s' is not supported in the Layout Editor.",
-                        shader.getClass().getCanonicalName()));
+        if (shader != null) {
+            java.awt.Paint shaderPaint = shader.getPaint();
+            if (shaderPaint != null) {
+                g.setPaint(shaderPaint);
+            } else {
+                if (mLogger != null) {
+                    mLogger.warning(String.format(
+                            "Shader '%1$s' is not supported in the Layout Editor.",
+                            shader.getClass().getCanonicalName()));
+                }
             }
         }
 
@@ -409,7 +412,7 @@ public class Canvas extends _Original_Canvas {
 
         g.setColor(new Color(color));
 
-        getGraphics2d().fillRect(0, 0, getWidth(), getHeight());
+        g.fillRect(0, 0, getWidth(), getHeight());
 
         g.setComposite(composite);
 
diff --git a/tools/layoutlib/bridge/src/android/graphics/ComposeShader.java b/tools/layoutlib/bridge/src/android/graphics/ComposeShader.java
index 968a597..df1101d 100644
--- a/tools/layoutlib/bridge/src/android/graphics/ComposeShader.java
+++ b/tools/layoutlib/bridge/src/android/graphics/ComposeShader.java
@@ -16,6 +16,8 @@
 
 package android.graphics;
 
+import java.awt.Paint;
+
 /** A subclass of shader that returns the composition of two other shaders, combined by
     an {@link android.graphics.Xfermode} subclass.
 */
@@ -42,5 +44,10 @@ public class ComposeShader extends Shader {
     public ComposeShader(Shader shaderA, Shader shaderB, PorterDuff.Mode mode) {
         // FIXME Implement shader
     }
+
+    @Override
+    Paint getPaint() {
+        return null;
+    }
 }
 
diff --git a/tools/layoutlib/bridge/src/android/graphics/LinearGradient.java b/tools/layoutlib/bridge/src/android/graphics/LinearGradient.java
index 1a0dc05..ea9eae9 100644
--- a/tools/layoutlib/bridge/src/android/graphics/LinearGradient.java
+++ b/tools/layoutlib/bridge/src/android/graphics/LinearGradient.java
@@ -21,51 +21,59 @@ import java.awt.Color;
 import java.awt.Paint;
 
 public class LinearGradient extends Shader {
-    
+
     private GradientPaint mGradientPaint;
 
-    /** Create a shader that draws a linear gradient along a line.
-        @param x0           The x-coordinate for the start of the gradient line
-        @param y0           The y-coordinate for the start of the gradient line
-        @param x1           The x-coordinate for the end of the gradient line
-        @param y1           The y-coordinate for the end of the gradient line
-        @param  colors      The colors to be distributed along the gradient line
-        @param  positions   May be null. The relative positions [0..1] of
-                            each corresponding color in the colors array. If this is null,
-                            the the colors are distributed evenly along the gradient line.
-        @param  tile        The Shader tiling mode
-    */
-    public LinearGradient(float x0, float y0, float x1, float y1,
-                          int colors[], float positions[], TileMode tile) {
+    /**
+     * Create a shader that draws a linear gradient along a line.
+     *
+     * @param x0 The x-coordinate for the start of the gradient line
+     * @param y0 The y-coordinate for the start of the gradient line
+     * @param x1 The x-coordinate for the end of the gradient line
+     * @param y1 The y-coordinate for the end of the gradient line
+     * @param colors The colors to be distributed along the gradient line
+     * @param positions May be null. The relative positions [0..1] of each
+     *            corresponding color in the colors array. If this is null, the
+     *            the colors are distributed evenly along the gradient line.
+     * @param tile The Shader tiling mode
+     */
+    public LinearGradient(float x0, float y0, float x1, float y1, int colors[], float positions[],
+            TileMode tile) {
         if (colors.length < 2) {
             throw new IllegalArgumentException("needs >= 2 number of colors");
         }
         if (positions != null && colors.length != positions.length) {
             throw new IllegalArgumentException("color and position arrays must be of equal length");
         }
-        
+
         // FIXME implement multi color linear gradient
+        if (colors.length == 2) {
+            mGradientPaint = new GradientPaint(x0, y0, new Color(colors[0], true /* hasalpha */),
+                    x1, y1, new Color(colors[1], true /* hasalpha */), tile != TileMode.CLAMP);
+        }
     }
 
-    /** Create a shader that draws a linear gradient along a line.
-        @param x0       The x-coordinate for the start of the gradient line
-        @param y0       The y-coordinate for the start of the gradient line
-        @param x1       The x-coordinate for the end of the gradient line
-        @param y1       The y-coordinate for the end of the gradient line
-        @param  color0  The color at the start of the gradient line.
-        @param  color1  The color at the end of the gradient line.
-        @param  tile    The Shader tiling mode
-    */
-    public LinearGradient(float x0, float y0, float x1, float y1,
-                          int color0, int color1, TileMode tile) {
-        mGradientPaint = new GradientPaint(x0, y0, new Color(color0, true /* hasalpha */),
-                x1,y1, new Color(color1, true /* hasalpha */), tile != TileMode.CLAMP);
+    /**
+     * Create a shader that draws a linear gradient along a line.
+     *
+     * @param x0 The x-coordinate for the start of the gradient line
+     * @param y0 The y-coordinate for the start of the gradient line
+     * @param x1 The x-coordinate for the end of the gradient line
+     * @param y1 The y-coordinate for the end of the gradient line
+     * @param color0 The color at the start of the gradient line.
+     * @param color1 The color at the end of the gradient line.
+     * @param tile The Shader tiling mode
+     */
+    public LinearGradient(float x0, float y0, float x1, float y1, int color0, int color1,
+            TileMode tile) {
+        mGradientPaint = new GradientPaint(x0, y0, new Color(color0, true /* hasalpha */), x1, y1,
+                new Color(color1, true /* hasalpha */), tile != TileMode.CLAMP);
     }
-    
-    //---------- Custom Methods
-    
+
+    // ---------- Custom Methods
+
+    @Override
     public Paint getPaint() {
         return mGradientPaint;
     }
 }
-
diff --git a/tools/layoutlib/bridge/src/android/graphics/Paint.java b/tools/layoutlib/bridge/src/android/graphics/Paint.java
index f3af133..312dab3 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Paint.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Paint.java
@@ -59,23 +59,14 @@ public class Paint extends _Original_Paint {
     private final FontRenderContext mFontContext = new FontRenderContext(
             new AffineTransform(), true, true);
 
-    @SuppressWarnings("hiding")
     public static final int ANTI_ALIAS_FLAG       = _Original_Paint.ANTI_ALIAS_FLAG;
-    @SuppressWarnings("hiding")
     public static final int FILTER_BITMAP_FLAG    = _Original_Paint.FILTER_BITMAP_FLAG;
-    @SuppressWarnings("hiding")
     public static final int DITHER_FLAG           = _Original_Paint.DITHER_FLAG;
-    @SuppressWarnings("hiding")
     public static final int UNDERLINE_TEXT_FLAG   = _Original_Paint.UNDERLINE_TEXT_FLAG;
-    @SuppressWarnings("hiding")
     public static final int STRIKE_THRU_TEXT_FLAG = _Original_Paint.STRIKE_THRU_TEXT_FLAG;
-    @SuppressWarnings("hiding")
     public static final int FAKE_BOLD_TEXT_FLAG   = _Original_Paint.FAKE_BOLD_TEXT_FLAG;
-    @SuppressWarnings("hiding")
     public static final int LINEAR_TEXT_FLAG      = _Original_Paint.LINEAR_TEXT_FLAG;
-    @SuppressWarnings("hiding")
     public static final int SUBPIXEL_TEXT_FLAG    = _Original_Paint.SUBPIXEL_TEXT_FLAG;
-    @SuppressWarnings("hiding")
     public static final int DEV_KERN_TEXT_FLAG    = _Original_Paint.DEV_KERN_TEXT_FLAG;
 
     public static class FontMetrics extends _Original_Paint.FontMetrics {
diff --git a/tools/layoutlib/bridge/src/android/graphics/RadialGradient.java b/tools/layoutlib/bridge/src/android/graphics/RadialGradient.java
index 61b693a..e7c1828 100644
--- a/tools/layoutlib/bridge/src/android/graphics/RadialGradient.java
+++ b/tools/layoutlib/bridge/src/android/graphics/RadialGradient.java
@@ -16,6 +16,8 @@
 
 package android.graphics;
 
+import java.awt.Paint;
+
 public class RadialGradient extends Shader {
 
    /** Create a shader that draws a radial gradient given the center and radius.
@@ -58,5 +60,11 @@ public class RadialGradient extends Shader {
        }
        // FIXME Implement shader
    }
+
+    @Override
+    Paint getPaint() {
+        // TODO Auto-generated method stub
+        return null;
+    }
 }
 
diff --git a/tools/layoutlib/bridge/src/android/graphics/Shader.java b/tools/layoutlib/bridge/src/android/graphics/Shader.java
index 3a9fda5..d14db9c 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Shader.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Shader.java
@@ -16,14 +16,16 @@
 
 package android.graphics;
 
+
+
 /**
  * Shader is the based class for objects that return horizontal spans of colors
  * during drawing. A subclass of Shader is installed in a Paint calling
  * paint.setShader(shader). After that any object (other than a bitmap) that is
  * drawn with that paint will get its color(s) from the shader.
  */
-public class Shader {
-    
+public abstract class Shader {
+
     private final Matrix mMatrix = new Matrix();
 
     public enum TileMode {
@@ -41,7 +43,7 @@ public class Shader {
          * mirror images so that adjacent images always seam
          */
         MIRROR  (2);
-    
+
         TileMode(int nativeInt) {
             this.nativeInt = nativeInt;
         }
@@ -57,7 +59,7 @@ public class Shader {
         if (localM != null) {
             localM.set(mMatrix);
         }
-        
+
         return !mMatrix.isIdentity();
     }
 
@@ -73,4 +75,6 @@ public class Shader {
             mMatrix.reset();
         }
     }
+
+    abstract java.awt.Paint getPaint();
 }
diff --git a/tools/layoutlib/bridge/src/android/graphics/SweepGradient.java b/tools/layoutlib/bridge/src/android/graphics/SweepGradient.java
index e79e970..64a5f5a 100644
--- a/tools/layoutlib/bridge/src/android/graphics/SweepGradient.java
+++ b/tools/layoutlib/bridge/src/android/graphics/SweepGradient.java
@@ -16,6 +16,8 @@
 
 package android.graphics;
 
+import java.awt.Paint;
+
 public class SweepGradient extends Shader {
 
     /**
@@ -41,7 +43,7 @@ public class SweepGradient extends Shader {
             throw new IllegalArgumentException(
                         "color and position arrays must be of equal length");
         }
-        
+
         // FIXME Implement shader
     }
 
@@ -56,5 +58,11 @@ public class SweepGradient extends Shader {
     public SweepGradient(float cx, float cy, int color0, int color1) {
         // FIXME Implement shader
     }
+
+    @Override
+    Paint getPaint() {
+        // TODO Auto-generated method stub
+        return null;
+    }
 }