Merge "Quick scrub has gradient follow user drag" into pi-dev

packages/SystemUI/res/values/colors.xml

@@ -137,8 +137,10 @@
 
     <color name="remote_input_accent">#eeeeee</color>
 
-    <color name="quick_step_track_background_dark">#61000000</color>
-    <color name="quick_step_track_background_light">#33FFFFFF</color>
+    <color name="quick_step_track_background_background_dark">#1F000000</color>
+    <color name="quick_step_track_background_background_light">#33FFFFFF</color>
+    <color name="quick_step_track_background_foreground_dark">#38000000</color>
+    <color name="quick_step_track_background_foreground_light">#59FFFFFF</color>
 
     <!-- Keyboard shortcuts colors -->
     <color name="ksh_application_group_color">#fff44336</color>

packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickStepController.java

@@ -27,16 +27,16 @@ import static com.android.systemui.shared.system.NavigationBarCompat.HIT_TARGET_
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
-import android.animation.ArgbEvaluator;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Canvas;
-import android.graphics.Color;
 import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.RadialGradient;
 import android.graphics.Rect;
-import android.graphics.drawable.Drawable;
+import android.graphics.Shader;
 import android.os.Handler;
 import android.os.RemoteException;
 import android.util.FloatProperty;
@@ -55,7 +55,6 @@ import com.android.systemui.plugins.statusbar.phone.NavGesture.GestureHelper;
 import com.android.systemui.shared.recents.IOverviewProxy;
 import com.android.systemui.shared.recents.utilities.Utilities;
 import com.android.systemui.shared.system.NavigationBarCompat;
-import com.android.internal.graphics.ColorUtils;
 
 /**
  * Class to detect gestures on the navigation bar and implement quick scrub.
@@ -66,6 +65,7 @@ public class QuickStepController implements GestureHelper {
     private static final int ANIM_IN_DURATION_MS = 150;
     private static final int ANIM_OUT_DURATION_MS = 134;
     private static final float TRACK_SCALE = 0.95f;
+    private static final float GRADIENT_WIDTH = .75f;
 
     private NavigationBarView mNavigationBarView;
 
@@ -79,23 +79,22 @@ public class QuickStepController implements GestureHelper {
     private boolean mIsRTL;
     private float mTrackAlpha;
     private float mTrackScale = TRACK_SCALE;
-    private int mLightTrackColor;
-    private int mDarkTrackColor;
     private float mDarkIntensity;
+    private RadialGradient mHighlight;
+    private float mHighlightCenter;
     private AnimatorSet mTrackAnimator;
     private ButtonDispatcher mHitTarget;
     private View mCurrentNavigationBarView;
 
     private final Handler mHandler = new Handler();
     private final Rect mTrackRect = new Rect();
-    private final Drawable mTrackDrawable;
     private final OverviewProxyService mOverviewEventSender;
     private final int mTrackThickness;
     private final int mTrackEndPadding;
     private final Context mContext;
     private final Matrix mTransformGlobalMatrix = new Matrix();
     private final Matrix mTransformLocalMatrix = new Matrix();
-    private final ArgbEvaluator mTrackColorEvaluator = new ArgbEvaluator();
+    private final Paint mTrackPaint = new Paint();
 
     private final FloatProperty<QuickStepController> mTrackAlphaProperty =
             new FloatProperty<QuickStepController>("TrackAlpha") {
@@ -156,7 +155,8 @@ public class QuickStepController implements GestureHelper {
         mOverviewEventSender = Dependency.get(OverviewProxyService.class);
         mTrackThickness = res.getDimensionPixelSize(R.dimen.nav_quick_scrub_track_thickness);
         mTrackEndPadding = res.getDimensionPixelSize(R.dimen.nav_quick_scrub_track_edge_padding);
-        mTrackDrawable = context.getDrawable(R.drawable.qs_scrubber_track).mutate();
+        mTrackPaint.setAntiAlias(true);
+        mTrackPaint.setDither(true);
     }
 
     public void setComponents(NavigationBarView navigationBarView) {
@@ -290,6 +290,8 @@ public class QuickStepController implements GestureHelper {
                     } catch (RemoteException e) {
                         Log.e(TAG, "Failed to send progress of quick scrub.", e);
                     }
+                    mHighlightCenter = x;
+                    mNavigationBarView.invalidate();
                 }
                 break;
             }
@@ -313,18 +315,18 @@ public class QuickStepController implements GestureHelper {
         if (!mNavigationBarView.isQuickScrubEnabled()) {
             return;
         }
-        int color = (int) mTrackColorEvaluator.evaluate(mDarkIntensity, mLightTrackColor,
-                mDarkTrackColor);
-        int colorAlpha = ColorUtils.setAlphaComponent(color,
-                (int) (Color.alpha(color) * mTrackAlpha));
-        mTrackDrawable.setTint(colorAlpha);
+        mTrackPaint.setAlpha(Math.round(255f * mTrackAlpha));
 
         // Scale the track, but apply the inverse scale from the nav bar
+        final float radius = mTrackRect.height() / 2;
         canvas.save();
+        float translate = Utilities.clamp(mHighlightCenter, mTrackRect.left, mTrackRect.right);
+        canvas.translate(translate, 0);
         canvas.scale(mTrackScale / mNavigationBarView.getScaleX(),
                 1f / mNavigationBarView.getScaleY(),
                 mTrackRect.centerX(), mTrackRect.centerY());
-        mTrackDrawable.draw(canvas);
+        canvas.drawRoundRect(mTrackRect.left - translate, mTrackRect.top,
+                mTrackRect.right - translate, mTrackRect.bottom, radius, radius, mTrackPaint);
         canvas.restore();
     }
 
@@ -349,12 +351,20 @@ public class QuickStepController implements GestureHelper {
             x2 = x1 + width - 2 * mTrackEndPadding;
         }
         mTrackRect.set(x1, y1, x2, y2);
-        mTrackDrawable.setBounds(mTrackRect);
+        updateHighlight();
     }
 
     @Override
     public void onDarkIntensityChange(float intensity) {
+        final float oldIntensity = mDarkIntensity;
         mDarkIntensity = intensity;
+
+        // When in quick scrub, invalidate gradient if changing intensity from black to white and
+        // vice-versa
+        if (mNavigationBarView.isQuickScrubEnabled()
+                && Math.round(intensity) != Math.round(oldIntensity)) {
+            updateHighlight();
+        }
         mNavigationBarView.invalidate();
     }
 
@@ -411,10 +421,8 @@ public class QuickStepController implements GestureHelper {
 
     private void startQuickScrub() {
         if (!mQuickScrubActive) {
+            updateHighlight();
             mQuickScrubActive = true;
-            mLightTrackColor = mContext.getColor(R.color.quick_step_track_background_light);
-            mDarkTrackColor = mContext.getColor(R.color.quick_step_track_background_dark);
-
             ObjectAnimator trackAnimator = ObjectAnimator.ofPropertyValuesHolder(this,
                     PropertyValuesHolder.ofFloat(mTrackAlphaProperty, 1f),
                     PropertyValuesHolder.ofFloat(mTrackScaleProperty, 1f));
@@ -489,6 +497,22 @@ public class QuickStepController implements GestureHelper {
         mQuickScrubActive = false;
         mAllowGestureDetection = false;
         mCurrentNavigationBarView = null;
+        updateHighlight();
+    }
+
+    private void updateHighlight() {
+        int colorBase, colorGrad;
+        if (mDarkIntensity > 0.5f) {
+            colorBase = mContext.getColor(R.color.quick_step_track_background_background_dark);
+            colorGrad = mContext.getColor(R.color.quick_step_track_background_foreground_dark);
+        } else {
+            colorBase = mContext.getColor(R.color.quick_step_track_background_background_light);
+            colorGrad = mContext.getColor(R.color.quick_step_track_background_foreground_light);
+        }
+        mHighlight = new RadialGradient(0, mTrackRect.height() / 2,
+                mTrackRect.width() * GRADIENT_WIDTH, colorGrad, colorBase,
+                Shader.TileMode.CLAMP);
+        mTrackPaint.setShader(mHighlight);
     }
 
     private boolean proxyMotionEvents(MotionEvent event) {