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Diffstat (limited to 'src/com/android/launcher3/util/RevealOutlineProvider.java')
-rw-r--r--src/com/android/launcher3/util/RevealOutlineProvider.java49
1 files changed, 49 insertions, 0 deletions
diff --git a/src/com/android/launcher3/util/RevealOutlineProvider.java b/src/com/android/launcher3/util/RevealOutlineProvider.java
new file mode 100644
index 000000000..0db3984f8
--- /dev/null
+++ b/src/com/android/launcher3/util/RevealOutlineProvider.java
@@ -0,0 +1,49 @@
+package com.android.launcher3.util;
+
+import android.annotation.TargetApi;
+import android.graphics.Outline;
+import android.graphics.Rect;
+import android.os.Build;
+import android.view.View;
+import android.view.ViewOutlineProvider;
+
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+public class RevealOutlineProvider extends ViewOutlineProvider {
+
+ private int mCenterX;
+ private int mCenterY;
+ private float mRadius0;
+ private float mRadius1;
+ private int mCurrentRadius;
+
+ private final Rect mOval;
+
+ /**
+ * @param x reveal center x
+ * @param y reveal center y
+ * @param r0 initial radius
+ * @param r1 final radius
+ */
+ public RevealOutlineProvider(int x, int y, float r0, float r1) {
+ mCenterX = x;
+ mCenterY = y;
+ mRadius0 = r0;
+ mRadius1 = r1;
+
+ mOval = new Rect();
+ }
+
+ public void setProgress(float progress) {
+ mCurrentRadius = (int) ((1 - progress) * mRadius0 + progress * mRadius1);
+
+ mOval.left = mCenterX - mCurrentRadius;
+ mOval.top = mCenterY - mCurrentRadius;
+ mOval.right = mCenterX + mCurrentRadius;
+ mOval.bottom = mCenterY + mCurrentRadius;
+ }
+
+ @Override
+ public void getOutline(View v, Outline outline) {
+ outline.setRoundRect(mOval, mCurrentRadius);
+ }
+}