diff options
Diffstat (limited to 'src/com/android/gallery3d/ui/ProgressSpinner.java')
-rw-r--r-- | src/com/android/gallery3d/ui/ProgressSpinner.java | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/ui/ProgressSpinner.java b/src/com/android/gallery3d/ui/ProgressSpinner.java new file mode 100644 index 000000000..1b31af278 --- /dev/null +++ b/src/com/android/gallery3d/ui/ProgressSpinner.java @@ -0,0 +1,80 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * 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. + */ + +package com.android.gallery3d.ui; + +import android.content.Context; + +import com.android.gallery3d.R; +import com.android.gallery3d.glrenderer.GLCanvas; +import com.android.gallery3d.glrenderer.ResourceTexture; + +public class ProgressSpinner { + private static float ROTATE_SPEED_OUTER = 1080f / 3500f; + private static float ROTATE_SPEED_INNER = -720f / 3500f; + private final ResourceTexture mOuter; + private final ResourceTexture mInner; + private final int mWidth; + private final int mHeight; + + private float mInnerDegree = 0f; + private float mOuterDegree = 0f; + private long mAnimationTimestamp = -1; + + public ProgressSpinner(Context context) { + mOuter = new ResourceTexture(context, R.drawable.spinner_76_outer_holo); + mInner = new ResourceTexture(context, R.drawable.spinner_76_inner_holo); + + mWidth = Math.max(mOuter.getWidth(), mInner.getWidth()); + mHeight = Math.max(mOuter.getHeight(), mInner.getHeight()); + } + + public int getWidth() { + return mWidth; + } + + public int getHeight() { + return mHeight; + } + + public void startAnimation() { + mAnimationTimestamp = -1; + mOuterDegree = 0; + mInnerDegree = 0; + } + + public void draw(GLCanvas canvas, int x, int y) { + long now = AnimationTime.get(); + if (mAnimationTimestamp == -1) mAnimationTimestamp = now; + mOuterDegree += (now - mAnimationTimestamp) * ROTATE_SPEED_OUTER; + mInnerDegree += (now - mAnimationTimestamp) * ROTATE_SPEED_INNER; + + mAnimationTimestamp = now; + + // just preventing overflow + if (mOuterDegree > 360) mOuterDegree -= 360f; + if (mInnerDegree < 0) mInnerDegree += 360f; + + canvas.save(GLCanvas.SAVE_FLAG_MATRIX); + + canvas.translate(x + mWidth / 2, y + mHeight / 2); + canvas.rotate(mInnerDegree, 0, 0, 1); + mOuter.draw(canvas, -mOuter.getWidth() / 2, -mOuter.getHeight() / 2); + canvas.rotate(mOuterDegree - mInnerDegree, 0, 0, 1); + mInner.draw(canvas, -mInner.getWidth() / 2, -mInner.getHeight() / 2); + canvas.restore(); + } +} |