| /* |
| * Copyright (C) 2011 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.internal.widget.multiwaveview; |
| |
| import android.content.res.Resources; |
| import android.graphics.Canvas; |
| import android.graphics.ColorFilter; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.StateListDrawable; |
| import android.util.Log; |
| |
| public class TargetDrawable { |
| private static final String TAG = "TargetDrawable"; |
| private static final boolean DEBUG = false; |
| |
| public static final int[] STATE_ACTIVE = |
| { android.R.attr.state_enabled, android.R.attr.state_active }; |
| public static final int[] STATE_INACTIVE = |
| { android.R.attr.state_enabled, -android.R.attr.state_active }; |
| public static final int[] STATE_FOCUSED = |
| { android.R.attr.state_enabled, -android.R.attr.state_active, |
| android.R.attr.state_focused }; |
| |
| private float mTranslationX = 0.0f; |
| private float mTranslationY = 0.0f; |
| private float mPositionX = 0.0f; |
| private float mPositionY = 0.0f; |
| private float mScaleX = 1.0f; |
| private float mScaleY = 1.0f; |
| private float mAlpha = 1.0f; |
| private Drawable mDrawable; |
| private boolean mEnabled = true; |
| private final int mResourceId; |
| |
| public TargetDrawable(Resources res, int resId) { |
| mResourceId = resId; |
| setDrawable(res, resId); |
| } |
| |
| public void setDrawable(Resources res, int resId) { |
| // Note we explicitly don't set mResourceId to resId since we allow the drawable to be |
| // swapped at runtime and want to re-use the existing resource id for identification. |
| Drawable drawable = resId == 0 ? null : res.getDrawable(resId); |
| // Mutate the drawable so we can animate shared drawable properties. |
| mDrawable = drawable != null ? drawable.mutate() : null; |
| resizeDrawables(); |
| setState(STATE_INACTIVE); |
| } |
| |
| public TargetDrawable(TargetDrawable other) { |
| mResourceId = other.mResourceId; |
| // Mutate the drawable so we can animate shared drawable properties. |
| mDrawable = other.mDrawable != null ? other.mDrawable.mutate() : null; |
| resizeDrawables(); |
| setState(STATE_INACTIVE); |
| } |
| |
| public void setState(int [] state) { |
| if (mDrawable instanceof StateListDrawable) { |
| StateListDrawable d = (StateListDrawable) mDrawable; |
| d.setState(state); |
| } |
| } |
| |
| public boolean hasState(int [] state) { |
| if (mDrawable instanceof StateListDrawable) { |
| StateListDrawable d = (StateListDrawable) mDrawable; |
| // TODO: this doesn't seem to work |
| return d.getStateDrawableIndex(state) != -1; |
| } |
| return false; |
| } |
| |
| /** |
| * Returns true if the drawable is a StateListDrawable and is in the focused state. |
| * |
| * @return |
| */ |
| public boolean isActive() { |
| if (mDrawable instanceof StateListDrawable) { |
| StateListDrawable d = (StateListDrawable) mDrawable; |
| int[] states = d.getState(); |
| for (int i = 0; i < states.length; i++) { |
| if (states[i] == android.R.attr.state_focused) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns true if this target is enabled. Typically an enabled target contains a valid |
| * drawable in a valid state. Currently all targets with valid drawables are valid. |
| * |
| * @return |
| */ |
| public boolean isEnabled() { |
| return mDrawable != null && mEnabled; |
| } |
| |
| /** |
| * Makes drawables in a StateListDrawable all the same dimensions. |
| * If not a StateListDrawable, then justs sets the bounds to the intrinsic size of the |
| * drawable. |
| */ |
| private void resizeDrawables() { |
| if (mDrawable instanceof StateListDrawable) { |
| StateListDrawable d = (StateListDrawable) mDrawable; |
| int maxWidth = 0; |
| int maxHeight = 0; |
| for (int i = 0; i < d.getStateCount(); i++) { |
| Drawable childDrawable = d.getStateDrawable(i); |
| maxWidth = Math.max(maxWidth, childDrawable.getIntrinsicWidth()); |
| maxHeight = Math.max(maxHeight, childDrawable.getIntrinsicHeight()); |
| } |
| if (DEBUG) Log.v(TAG, "union of childDrawable rects " + d + " to: " |
| + maxWidth + "x" + maxHeight); |
| d.setBounds(0, 0, maxWidth, maxHeight); |
| for (int i = 0; i < d.getStateCount(); i++) { |
| Drawable childDrawable = d.getStateDrawable(i); |
| if (DEBUG) Log.v(TAG, "sizing drawable " + childDrawable + " to: " |
| + maxWidth + "x" + maxHeight); |
| childDrawable.setBounds(0, 0, maxWidth, maxHeight); |
| } |
| } else if (mDrawable != null) { |
| mDrawable.setBounds(0, 0, |
| mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight()); |
| } |
| } |
| |
| public void setX(float x) { |
| mTranslationX = x; |
| } |
| |
| public void setY(float y) { |
| mTranslationY = y; |
| } |
| |
| public void setScaleX(float x) { |
| mScaleX = x; |
| } |
| |
| public void setScaleY(float y) { |
| mScaleY = y; |
| } |
| |
| public void setAlpha(float alpha) { |
| mAlpha = alpha; |
| } |
| |
| public float getX() { |
| return mTranslationX; |
| } |
| |
| public float getY() { |
| return mTranslationY; |
| } |
| |
| public float getScaleX() { |
| return mScaleX; |
| } |
| |
| public float getScaleY() { |
| return mScaleY; |
| } |
| |
| public float getAlpha() { |
| return mAlpha; |
| } |
| |
| public void setPositionX(float x) { |
| mPositionX = x; |
| } |
| |
| public void setPositionY(float y) { |
| mPositionY = y; |
| } |
| |
| public float getPositionX() { |
| return mPositionX; |
| } |
| |
| public float getPositionY() { |
| return mPositionY; |
| } |
| |
| public int getWidth() { |
| return mDrawable != null ? mDrawable.getIntrinsicWidth() : 0; |
| } |
| |
| public int getHeight() { |
| return mDrawable != null ? mDrawable.getIntrinsicHeight() : 0; |
| } |
| |
| public void draw(Canvas canvas) { |
| if (mDrawable == null || !mEnabled) { |
| return; |
| } |
| canvas.save(Canvas.MATRIX_SAVE_FLAG); |
| canvas.scale(mScaleX, mScaleY, mPositionX, mPositionY); |
| canvas.translate(mTranslationX + mPositionX, mTranslationY + mPositionY); |
| canvas.translate(-0.5f * getWidth(), -0.5f * getHeight()); |
| mDrawable.setAlpha((int) Math.round(mAlpha * 255f)); |
| mDrawable.draw(canvas); |
| canvas.restore(); |
| } |
| |
| public void setEnabled(boolean enabled) { |
| mEnabled = enabled; |
| } |
| |
| public int getResourceId() { |
| return mResourceId; |
| } |
| } |