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/*
* 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.camera.ui;
import javax.microedition.khronos.opengles.GL11;
import android.graphics.Rect;
import android.view.MotionEvent;
import android.view.View.MeasureSpec;
import android.view.animation.AlphaAnimation;
class IndicatorBar extends GLView {
public static final int INDEX_NONE = -1;
private NinePatchTexture mBackground;
private Texture mHighlight;
private int mSelectedIndex = INDEX_NONE;
private OnItemSelectedListener mSelectedListener;
private boolean mActivated = false;
private boolean mSelectionChanged = false;
private class Background extends GLView {
@Override
protected void render(GLRootView root, GL11 gl) {
mBackground.draw(root, 0, 0, getWidth(), getHeight());
if (mActivated && mSelectedIndex != INDEX_NONE
&& mHighlight != null) {
Rect bounds = IndicatorBar.this.getComponent(
mSelectedIndex + 1).mBounds;
mHighlight.draw(root, bounds.left, bounds.top,
bounds.width(), bounds.height());
}
}
}
public interface OnItemSelectedListener {
public void onItemSelected(GLView view, int position);
public void onNothingSelected();
}
public IndicatorBar() {
GLView background = new Background();
background.setVisibility(GLView.INVISIBLE);
addComponent(background);
}
public void overrideSettings(String key, String value) {
for (int i = 1, n = getComponentCount(); i < n; ++i) {
AbstractIndicator indicator = (AbstractIndicator) getComponent(i);
indicator.overrideSettings(key, value);
}
}
public void setOnItemSelectedListener(OnItemSelectedListener l) {
mSelectedListener = l;
}
public void setBackground(NinePatchTexture background) {
if (mBackground == background) return;
mBackground = background;
if (background != null) {
setPaddings(background.getPaddings());
} else {
setPaddings(0, 0, 0, 0);
}
invalidate();
}
public void setHighlight(Texture highlight) {
if (mHighlight == highlight) return;
mHighlight = highlight;
invalidate();
}
@Override
protected void onMeasure(int widthSpec, int heightSpec) {
int width = 0;
int height = 0;
for (int i = 1, n = getComponentCount(); i < n; ++i) {
GLView component = getComponent(i);
component.measure(
MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
width = Math.max(width, component.getMeasuredWidth());
height += component.getMeasuredHeight();
}
new MeasureHelper(this)
.setPreferredContentSize(width, height)
.measure(widthSpec, heightSpec);
}
@Override
protected void onLayout(
boolean changed, int left, int top, int right, int bottom) {
// Background
getComponent(0).layout(0, 0, right - left, bottom - top);
int count = getComponentCount();
Rect p = mPaddings;
int cBottom = bottom - top - p.bottom;
int cRight = right - left - p.right;
int yoffset = mPaddings.top;
int xoffset = mPaddings.left;
for (int i = 1; i < count; ++i) {
int cHeight = (cBottom - yoffset) / (count - i);
int nextYoffset = yoffset + cHeight;
getComponent(i).layout(xoffset, yoffset, cRight, nextYoffset);
yoffset = nextYoffset;
}
}
private void setSelectedItem(GLView view, int index) {
if (index == mSelectedIndex) return;
mSelectionChanged = true;
mSelectedIndex = index;
if (mSelectedListener != null) {
if (index == INDEX_NONE) {
mSelectedListener.onNothingSelected();
} else {
mSelectedListener.onItemSelected(view, index);
}
}
invalidate();
}
public void setSelectedIndex(int index) {
if (index == mSelectedIndex) return;
setSelectedItem(index == INDEX_NONE ? null :getComponent(index), index);
}
public void setActivated(boolean activated) {
if (activated == mActivated) return;
mActivated = activated;
if (activated) {
GLView background = getComponent(0);
background.setVisibility(GLView.VISIBLE);
AlphaAnimation anim = new AlphaAnimation(0, 1);
anim.setDuration(200);
background.startAnimation(anim);
} else {
GLView background = getComponent(0);
background.setVisibility(GLView.INVISIBLE);
AlphaAnimation anim = new AlphaAnimation(1, 0);
anim.setDuration(200);
background.startAnimation(anim);
}
}
public boolean isActivated() {
return mActivated;
}
@Override
protected boolean dispatchTouchEvent(MotionEvent event) {
// Do not pass motion events to children
return onTouch(event);
}
@Override @SuppressWarnings("fallthrough")
protected boolean onTouch(MotionEvent event) {
int y = (int) event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mSelectionChanged = false;
setActivated(true);
case MotionEvent.ACTION_MOVE:
for (int i = 1, n = getComponentCount(); i < n; ++i) {
GLView component = getComponent(i);
if (y <= component.mBounds.bottom) {
setSelectedItem(component, i - 1);
return true;
}
}
setSelectedItem(null, INDEX_NONE);
break;
case MotionEvent.ACTION_UP:
if (mSelectionChanged == false) {
setSelectedItem(null, INDEX_NONE);
}
}
return true;
}
public void reloadPreferences() {
for (int i = 1, n = getComponentCount(); i < n; ++i) {
((AbstractIndicator) getComponent(i)).reloadPreferences();
}
}
public void setOrientation(int orientation) {
for (int i = 1, n = getComponentCount(); i < n; ++i) {
((AbstractIndicator) getComponent(i)).setOrientation(orientation);
}
}
public int getSelectedIndex() {
return mSelectedIndex;
}
}
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