package com.glview.widget;
import java.util.ArrayList;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import com.glview.content.GLContext;
import com.glview.graphics.Rect;
import com.glview.graphics.drawable.Drawable;
import com.glview.hwui.GLCanvas;
import com.glview.view.Gravity;
import com.glview.view.View;
import com.glview.view.ViewGroup;
public class FrameLayout extends ViewGroup{
boolean mMeasureAllChildren = false;
private static final int DEFAULT_CHILD_GRAVITY = Gravity.TOP | Gravity.START;
private final ArrayList<View> mMatchParentChildren = new ArrayList<View>(1);
private int mForegroundPaddingLeft = 0;
private int mForegroundPaddingTop = 0;
private int mForegroundPaddingRight = 0;
private int mForegroundPaddingBottom = 0;
private final Rect mSelfBounds = new Rect();
private final Rect mOverlayBounds = new Rect();
private int mForegroundGravity = Gravity.FILL;
protected boolean mForegroundInPadding = true;
private Drawable mForeground;
boolean mForegroundBoundsChanged = false;
public FrameLayout(Context context) {
super(context);
}
public FrameLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public FrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public FrameLayout(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
TypedArray a = context.obtainStyledAttributes(
attrs, com.glview.R.styleable.FrameLayout, defStyleAttr, defStyleRes);
mForegroundGravity = a.getInt(
com.glview.R.styleable.FrameLayout_foregroundGravity, mForegroundGravity);
final Drawable d = GLContext.get().getResources().getDrawable(a.getResourceId(com.glview.R.styleable.FrameLayout_foreground, 0));
if (d != null) {
setForeground(d);
}
a.recycle();
}
/**
* {@inheritDoc}
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int count = mChildrenCount;
final boolean measureMatchParentChildren =
MeasureSpec.getMode(widthMeasureSpec) != MeasureSpec.EXACTLY ||
MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY;
mMatchParentChildren.clear();
int maxHeight = 0;
int maxWidth = 0;
int childState = 0;
for (int i = 0; i < count; i++) {
final View child = mChildren[i];
if (mMeasureAllChildren || child.getVisibility() != GONE) {
measureChildWithMargins(child, widthMeasureSpec, 0, heightMeasureSpec, 0);
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
maxWidth = Math.max(maxWidth,
child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin);
maxHeight = Math.max(maxHeight,
child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin);
childState = combineMeasuredStates(childState, child.getMeasuredState());
if (measureMatchParentChildren) {
if (lp.width == LayoutParams.MATCH_PARENT ||
lp.height == LayoutParams.MATCH_PARENT) {
mMatchParentChildren.add(child);
}
}
}
}
// Account for padding too
maxWidth += getPaddingLeftWithForeground() + getPaddingRightWithForeground();
maxHeight += getPaddingTopWithForeground() + getPaddingBottomWithForeground();
// Check against our minimum height and width
maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight());
maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth());
// Check against our foreground's minimum height and width
// final Drawable drawable = getForeground();
// if (drawable != null) {
// maxHeight = Math.max(maxHeight, drawable.getMinimumHeight());
// maxWidth = Math.max(maxWidth, drawable.getMinimumWidth());
// }
setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState),
resolveSizeAndState(maxHeight, heightMeasureSpec,
childState << MEASURED_HEIGHT_STATE_SHIFT));
count = mMatchParentChildren.size();
if (count > 1) {
for (int i = 0; i < count; i++) {
final View child = mMatchParentChildren.get(i);
// final GLView child = mChildren[i];
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
int childWidthMeasureSpec;
int childHeightMeasureSpec;
if (lp.width == LayoutParams.MATCH_PARENT) {
childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
getMeasuredWidth()
- getPaddingLeftWithForeground()
- getPaddingRightWithForeground() -
lp.leftMargin - lp.rightMargin, MeasureSpec.EXACTLY);
} else {
childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec,
getPaddingLeftWithForeground() +
getPaddingRightWithForeground() +
lp.leftMargin + lp.rightMargin, lp.width);
}
if (lp.height == LayoutParams.MATCH_PARENT) {
childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
getMeasuredHeight() -
getPaddingTopWithForeground() -
getPaddingBottomWithForeground() -
lp.topMargin - lp.bottomMargin, MeasureSpec.EXACTLY);
} else {
childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec,
getPaddingTopWithForeground() +
getPaddingBottomWithForeground() +
lp.topMargin + lp.bottomMargin, lp.height);
}
child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
}
}
}
/**
* Sets whether to consider all children, or just those in
* the VISIBLE or INVISIBLE state, when measuring. Defaults to false.
*
* @param measureAll true to consider children marked GONE, false otherwise.
* Default value is false.
*
*/
public void setMeasureAllChildren(boolean measureAll) {
mMeasureAllChildren = measureAll;
}
/**
* {@inheritDoc}
*/
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
layoutChildren(left, top, right, bottom, false /* no force left gravity */);
}
void layoutChildren(int left, int top, int right, int bottom,
boolean forceLeftGravity) {
final int count = getChildCount();
final int parentLeft = getPaddingLeftWithForeground();
final int parentRight = right - left - getPaddingRightWithForeground();
final int parentTop = getPaddingTopWithForeground();
final int parentBottom = bottom - top - getPaddingBottomWithForeground();
mForegroundBoundsChanged = true;
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != GONE) {
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
final int width = child.getMeasuredWidth();
final int height = child.getMeasuredHeight();
int childLeft;
int childTop;
int gravity = lp.gravity;
if (gravity == -1) {
gravity = DEFAULT_CHILD_GRAVITY;
}
final int layoutDirection = getLayoutDirection();
final int absoluteGravity = Gravity.getAbsoluteGravity(gravity, layoutDirection);
final int verticalGravity = gravity & Gravity.VERTICAL_GRAVITY_MASK;
switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
case Gravity.CENTER_HORIZONTAL:
childLeft = parentLeft + (parentRight - parentLeft - width) / 2 +
lp.leftMargin - lp.rightMargin;
break;
case Gravity.RIGHT:
if (!forceLeftGravity) {
childLeft = parentRight - width - lp.rightMargin;
break;
}
case Gravity.LEFT:
default:
childLeft = parentLeft + lp.leftMargin;
}
switch (verticalGravity) {
case Gravity.TOP:
childTop = parentTop + lp.topMargin;
break;
case Gravity.CENTER_VERTICAL:
childTop = parentTop + (parentBottom - parentTop - height) / 2 +
lp.topMargin - lp.bottomMargin;
break;
case Gravity.BOTTOM:
childTop = parentBottom - height - lp.bottomMargin;
break;
default:
childTop = parentTop + lp.topMargin;
}
child.layout(childLeft, childTop, childLeft + width, childTop + height);
}
}
}
/**
* {@inheritDoc}
*/
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mForegroundBoundsChanged = true;
}
/**
* {@inheritDoc}
*/
@Override
public void draw(GLCanvas canvas) {
super.draw(canvas);
if (mForeground != null) {
final Drawable foreground = mForeground;
if (mForegroundBoundsChanged) {
mForegroundBoundsChanged = false;
final Rect selfBounds = mSelfBounds;
final Rect overlayBounds = mOverlayBounds;
final int w = mRight-mLeft;
final int h = mBottom-mTop;
if (mForegroundInPadding) {
selfBounds.set(0, 0, w, h);
} else {
selfBounds.set(mPaddingLeft, mPaddingTop, w - mPaddingRight, h - mPaddingBottom);
}
final int layoutDirection = getLayoutDirection();
Gravity.apply(mForegroundGravity, foreground.getIntrinsicWidth(),
foreground.getIntrinsicHeight(), selfBounds, overlayBounds,
layoutDirection);
foreground.setBounds(overlayBounds);
}
foreground.draw(canvas);
}
}
/**
* Supply a Drawable that is to be rendered on top of all of the child
* views in the frame layout. Any padding in the Drawable will be taken
* into account by ensuring that the children are inset to be placed
* inside of the padding area.
*
* @param d The Drawable to be drawn on top of the children.
*
* @attr ref android.R.styleable#FrameLayout_foreground
*/
public void setForeground(Drawable d) {
if (mForeground != d) {
if (mForeground != null) {
mForeground.setCallback(null);
unscheduleDrawable(mForeground);
}
mForeground = d;
mForegroundPaddingLeft = 0;
mForegroundPaddingTop = 0;
mForegroundPaddingRight = 0;
mForegroundPaddingBottom = 0;
if (d != null) {
setWillNotDraw(false);
d.setCallback(this);
d.setLayoutDirection(getLayoutDirection());
if (d.isStateful()) {
d.setState(getDrawableState());
}
if (mForegroundGravity == Gravity.FILL) {
Rect padding = new Rect();
if (d.getPadding(padding)) {
mForegroundPaddingLeft = padding.left;
mForegroundPaddingTop = padding.top;
mForegroundPaddingRight = padding.right;
mForegroundPaddingBottom = padding.bottom;
}
}
} else {
setWillNotDraw(true);
}
requestLayout();
invalidate();
}
}
/**
* Returns the drawable used as the foreground of this FrameLayout. The
* foreground drawable, if non-null, is always drawn on top of the children.
*
* @return A Drawable or null if no foreground was set.
*/
public Drawable getForeground() {
return mForeground;
}
public void setForegroundGravity(int foregroundGravity) {
if (mForegroundGravity != foregroundGravity) {
if ((foregroundGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
foregroundGravity |= Gravity.START;
}
if ((foregroundGravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
foregroundGravity |= Gravity.TOP;
}
mForegroundGravity = foregroundGravity;
if (mForegroundGravity == Gravity.FILL && mForeground != null) {
Rect padding = new Rect();
if (mForeground.getPadding(padding)) {
mForegroundPaddingLeft = padding.left;
mForegroundPaddingTop = padding.top;
mForegroundPaddingRight = padding.right;
mForegroundPaddingBottom = padding.bottom;
}
} else {
mForegroundPaddingLeft = 0;
mForegroundPaddingTop = 0;
mForegroundPaddingRight = 0;
mForegroundPaddingBottom = 0;
}
requestLayout();
}
}
@Override
public void setVisibility(int visibility) {
super.setVisibility(visibility);
if (mForeground != null) {
mForeground.setVisible(visibility == VISIBLE, false);
}
}
/**
* {@inheritDoc}
*/
@Override
protected boolean verifyDrawable(Drawable who) {
return super.verifyDrawable(who) || (who == mForeground);
}
@Override
public void jumpDrawablesToCurrentState() {
super.jumpDrawablesToCurrentState();
if (mForeground != null) mForeground.jumpToCurrentState();
}
/**
* {@inheritDoc}
*/
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
if (mForeground != null && mForeground.isStateful()) {
mForeground.setState(getDrawableState());
}
}
int getPaddingLeftWithForeground() {
return mForegroundInPadding ? Math.max(mPaddingLeft, mForegroundPaddingLeft) :
mPaddingLeft + mForegroundPaddingLeft;
}
int getPaddingRightWithForeground() {
return mForegroundInPadding ? Math.max(mPaddingRight, mForegroundPaddingRight) :
mPaddingRight + mForegroundPaddingRight;
}
int getPaddingTopWithForeground() {
return mForegroundInPadding ? Math.max(mPaddingTop, mForegroundPaddingTop) :
mPaddingTop + mForegroundPaddingTop;
}
int getPaddingBottomWithForeground() {
return mForegroundInPadding ? Math.max(mPaddingBottom, mForegroundPaddingBottom) :
mPaddingBottom + mForegroundPaddingBottom;
}
@Override
protected LayoutParams generateDefaultLayoutParams() {
return new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
}
/**
* {@inheritDoc}
*/
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new FrameLayout.LayoutParams(mContext, attrs);
}
/**
* {@inheritDoc}
*/
@Override
protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
return p instanceof LayoutParams;
}
@Override
protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
return new LayoutParams(p);
}
public static class LayoutParams extends ViewGroup.MarginLayoutParams{
/**
* The gravity to apply with the View to which these layout parameters
* are associated.
*
* @see android.view.Gravity
*
* @attr ref android.R.styleable#FrameLayout_Layout_layout_gravity
*/
public int gravity = -1;
/**
* {@inheritDoc}
*/
public LayoutParams(Context c, AttributeSet attrs) {
super(c, attrs);
TypedArray a = c.obtainStyledAttributes(attrs, com.glview.R.styleable.FrameLayout_Layout);
gravity = a.getInt(com.glview.R.styleable.FrameLayout_Layout_layout_gravity, -1);
a.recycle();
}
/**
* {@inheritDoc}
*/
public LayoutParams(int width, int height) {
super(width, height);
}
/**
* Creates a new set of layout parameters with the specified width, height
* and weight.
*
* @param width the width, either {@link #MATCH_PARENT},
* {@link #WRAP_CONTENT} or a fixed size in pixels
* @param height the height, either {@link #MATCH_PARENT},
* {@link #WRAP_CONTENT} or a fixed size in pixels
* @param gravity the gravity
*
* @see android.view.Gravity
*/
public LayoutParams(int width, int height, int gravity) {
super(width, height);
this.gravity = gravity;
}
/**
* {@inheritDoc}
*/
public LayoutParams(ViewGroup.LayoutParams source) {
super(source);
}
}
}