import android.view.MotionEvent;
import com.android.gallery3d.R;
+import com.android.gallery3d.common.Utils;
+import com.android.gallery3d.glrenderer.GLCanvas;
+import com.android.gallery3d.glrenderer.NinePatchTexture;
+import com.android.gallery3d.glrenderer.ResourceTexture;
+import com.android.gallery3d.glrenderer.StringTexture;
import com.android.gallery3d.util.GalleryUtils;
public class UndoBarView extends GLView {
+ @SuppressWarnings("unused")
private static final String TAG = "UndoBarView";
private static final int WHITE = 0xFFFFFFFF;
// +-+----+----------------+-+--+----+-+------+--+-+
// 4 16 1 12 32 8 16 4
public UndoBarView(Context context) {
- mBarHeight = (int) GalleryUtils.dpToPixel(48);
- mBarMargin = (int) GalleryUtils.dpToPixel(4);
- mUndoTextMargin = (int) GalleryUtils.dpToPixel(16);
- mIconMargin = (int) GalleryUtils.dpToPixel(8);
- mIconSize = (int) GalleryUtils.dpToPixel(32);
- mSeparatorRightMargin = (int) GalleryUtils.dpToPixel(12);
- mSeparatorTopMargin = (int) GalleryUtils.dpToPixel(10);
- mSeparatorBottomMargin = (int) GalleryUtils.dpToPixel(10);
- mSeparatorWidth = (int) GalleryUtils.dpToPixel(1);
- mDeletedTextMargin = (int) GalleryUtils.dpToPixel(16);
+ mBarHeight = GalleryUtils.dpToPixel(48);
+ mBarMargin = GalleryUtils.dpToPixel(4);
+ mUndoTextMargin = GalleryUtils.dpToPixel(16);
+ mIconMargin = GalleryUtils.dpToPixel(8);
+ mIconSize = GalleryUtils.dpToPixel(32);
+ mSeparatorRightMargin = GalleryUtils.dpToPixel(12);
+ mSeparatorTopMargin = GalleryUtils.dpToPixel(10);
+ mSeparatorBottomMargin = GalleryUtils.dpToPixel(10);
+ mSeparatorWidth = GalleryUtils.dpToPixel(1);
+ mDeletedTextMargin = GalleryUtils.dpToPixel(16);
mPanel = new NinePatchTexture(context, R.drawable.panel_undo_holo);
mUndoText = StringTexture.newInstance(context.getString(R.string.undo),
@Override
protected void render(GLCanvas canvas) {
super.render(canvas);
+ advanceAnimation();
+
+ canvas.save(GLCanvas.SAVE_FLAG_ALPHA);
+ canvas.multiplyAlpha(mAlpha);
+
int w = getWidth();
int h = getHeight();
mPanel.draw(canvas, mBarMargin, 0, w - mBarMargin * 2, mBarHeight);
x = mBarMargin + mDeletedTextMargin;
y = (mBarHeight - mDeletedText.getHeight()) / 2;
mDeletedText.draw(canvas, x, y);
+
+ canvas.restore();
}
@Override
int h = getHeight();
return (x >= w - mClickRegion && x < w && y >= 0 && y < h);
}
+
+ ////////////////////////////////////////////////////////////////////////////
+ // Alpha Animation
+ ////////////////////////////////////////////////////////////////////////////
+
+ private static final long NO_ANIMATION = -1;
+ private static long ANIM_TIME = 200;
+ private long mAnimationStartTime = NO_ANIMATION;
+ private float mFromAlpha, mToAlpha;
+ private float mAlpha;
+
+ private static float getTargetAlpha(int visibility) {
+ return (visibility == VISIBLE) ? 1f : 0f;
+ }
+
+ @Override
+ public void setVisibility(int visibility) {
+ mAlpha = getTargetAlpha(visibility);
+ mAnimationStartTime = NO_ANIMATION;
+ super.setVisibility(visibility);
+ invalidate();
+ }
+
+ public void animateVisibility(int visibility) {
+ float target = getTargetAlpha(visibility);
+ if (mAnimationStartTime == NO_ANIMATION && mAlpha == target) return;
+ if (mAnimationStartTime != NO_ANIMATION && mToAlpha == target) return;
+
+ mFromAlpha = mAlpha;
+ mToAlpha = target;
+ mAnimationStartTime = AnimationTime.startTime();
+
+ super.setVisibility(VISIBLE);
+ invalidate();
+ }
+
+ private void advanceAnimation() {
+ if (mAnimationStartTime == NO_ANIMATION) return;
+
+ float delta = (float) (AnimationTime.get() - mAnimationStartTime) /
+ ANIM_TIME;
+ mAlpha = mFromAlpha + ((mToAlpha > mFromAlpha) ? delta : -delta);
+ mAlpha = Utils.clamp(mAlpha, 0f, 1f);
+
+ if (mAlpha == mToAlpha) {
+ mAnimationStartTime = NO_ANIMATION;
+ if (mAlpha == 0) {
+ super.setVisibility(INVISIBLE);
+ }
+ }
+ invalidate();
+ }
}