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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:45 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:45 -0800 |
commit | d83a98f4ce9cfa908f5c54bbd70f03eec07e7553 (patch) | |
tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /core/java/android/widget/FrameLayout.java | |
parent | 076357b8567458d4b6dfdcf839ef751634cd2bfb (diff) | |
download | frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.zip frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.tar.gz frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.tar.bz2 |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'core/java/android/widget/FrameLayout.java')
-rw-r--r-- | core/java/android/widget/FrameLayout.java | 450 |
1 files changed, 0 insertions, 450 deletions
diff --git a/core/java/android/widget/FrameLayout.java b/core/java/android/widget/FrameLayout.java deleted file mode 100644 index 8aafee2..0000000 --- a/core/java/android/widget/FrameLayout.java +++ /dev/null @@ -1,450 +0,0 @@ -/* - * Copyright (C) 2006 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 android.widget; - -import android.content.Context; -import android.content.res.TypedArray; -import android.graphics.Canvas; -import android.graphics.Rect; -import android.graphics.Region; -import android.graphics.drawable.Drawable; -import android.util.AttributeSet; -import android.view.View; -import android.view.ViewGroup; -import android.view.Gravity; -import android.widget.RemoteViews.RemoteView; - - -/** - * FrameLayout is designed to block out an area on the screen to display - * a single item. You can add multiple children to a FrameLayout, but all - * children are pegged to the top left of the screen. - * Children are drawn in a stack, with the most recently added child on top. - * The size of the frame layout is the size of its largest child (plus padding), visible - * or not (if the FrameLayout's parent permits). Views that are GONE are used for sizing - * only if {@link #setMeasureAllChildren(boolean) setConsiderGoneChildrenWhenMeasuring()} - * is set to true. - * - * @attr ref android.R.styleable#FrameLayout_foreground - * @attr ref android.R.styleable#FrameLayout_foregroundGravity - * @attr ref android.R.styleable#FrameLayout_measureAllChildren - */ -@RemoteView -public class FrameLayout extends ViewGroup { - boolean mMeasureAllChildren = false; - - private Drawable mForeground; - 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; - - public FrameLayout(Context context) { - super(context); - } - - public FrameLayout(Context context, AttributeSet attrs) { - this(context, attrs, 0); - } - - public FrameLayout(Context context, AttributeSet attrs, int defStyle) { - super(context, attrs, defStyle); - - TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.FrameLayout, - defStyle, 0); - - final Drawable d = a.getDrawable(com.android.internal.R.styleable.FrameLayout_foreground); - if (d != null) { - setForeground(d); - } - - if (a.getBoolean(com.android.internal.R.styleable.FrameLayout_measureAllChildren, false)) { - setMeasureAllChildren(true); - } - - mForegroundGravity = a.getInt(com.android.internal.R.styleable.FrameLayout_foregroundGravity, - mForegroundGravity); - - a.recycle(); - } - - /** - * Describes how the foreground is positioned. Defaults to FILL. - * - * @param foregroundGravity See {@link android.view.Gravity} - * - * @attr ref android.R.styleable#FrameLayout_foregroundGravity - */ - @android.view.RemotableViewMethod - public void setForegroundGravity(int foregroundGravity) { - if (mForegroundGravity != foregroundGravity) { - if ((foregroundGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) { - foregroundGravity |= Gravity.LEFT; - } - - if ((foregroundGravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) { - foregroundGravity |= Gravity.TOP; - } - - mForegroundGravity = foregroundGravity; - requestLayout(); - } - } - - /** - * {@inheritDoc} - */ - @Override - protected boolean verifyDrawable(Drawable who) { - return super.verifyDrawable(who) || (who == mForeground); - } - - /** - * {@inheritDoc} - */ - @Override - protected void drawableStateChanged() { - super.drawableStateChanged(); - if (mForeground != null && mForeground.isStateful()) { - mForeground.setState(getDrawableState()); - } - } - - /** - * Returns a set of layout parameters with a width of - * {@link android.view.ViewGroup.LayoutParams#FILL_PARENT}, - * and a height of {@link android.view.ViewGroup.LayoutParams#FILL_PARENT}. - */ - @Override - protected LayoutParams generateDefaultLayoutParams() { - return new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT); - } - - /** - * 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 drawable The Drawable to be drawn on top of the children. - * - * @attr ref android.R.styleable#FrameLayout_foreground - */ - public void setForeground(Drawable drawable) { - if (mForeground != drawable) { - if (mForeground != null) { - mForeground.setCallback(null); - unscheduleDrawable(mForeground); - } - - mForeground = drawable; - mForegroundPaddingLeft = 0; - mForegroundPaddingTop = 0; - mForegroundPaddingRight = 0; - mForegroundPaddingBottom = 0; - - if (drawable != null) { - setWillNotDraw(false); - drawable.setCallback(this); - if (drawable.isStateful()) { - drawable.setState(getDrawableState()); - } - Rect padding = new Rect(); - if (drawable.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; - } - - /** - * {@inheritDoc} - */ - @Override - protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { - final int count = getChildCount(); - - int maxHeight = 0; - int maxWidth = 0; - - // Find rightmost and bottommost child - for (int i = 0; i < count; i++) { - final View child = getChildAt(i); - if (mMeasureAllChildren || child.getVisibility() != GONE) { - measureChildWithMargins(child, widthMeasureSpec, 0, heightMeasureSpec, 0); - maxWidth = Math.max(maxWidth, child.getMeasuredWidth()); - maxHeight = Math.max(maxHeight, child.getMeasuredHeight()); - } - } - - // Account for padding too - maxWidth += mPaddingLeft + mPaddingRight + mForegroundPaddingLeft + mForegroundPaddingRight; - maxHeight += mPaddingTop + mPaddingBottom + mForegroundPaddingTop + mForegroundPaddingBottom; - - // 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(resolveSize(maxWidth, widthMeasureSpec), - resolveSize(maxHeight, heightMeasureSpec)); - } - - /** - * {@inheritDoc} - */ - @Override - protected void onLayout(boolean changed, int left, int top, int right, int bottom) { - final int count = getChildCount(); - - final int parentLeft = mPaddingLeft + mForegroundPaddingLeft; - final int parentRight = right - left - mPaddingRight - mForegroundPaddingRight; - - final int parentTop = mPaddingTop + mForegroundPaddingTop; - final int parentBottom = bottom - top - mPaddingBottom - mForegroundPaddingBottom; - - 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 = parentLeft; - int childTop = parentTop; - - final int gravity = lp.gravity; - - if (gravity != -1) { - final int horizontalGravity = gravity & Gravity.HORIZONTAL_GRAVITY_MASK; - final int verticalGravity = gravity & Gravity.VERTICAL_GRAVITY_MASK; - - switch (horizontalGravity) { - case Gravity.LEFT: - childLeft = parentLeft + lp.leftMargin; - break; - case Gravity.CENTER_HORIZONTAL: - childLeft = parentLeft + (parentRight - parentLeft + lp.leftMargin + - lp.rightMargin - width) / 2; - break; - case Gravity.RIGHT: - childLeft = parentRight - width - lp.rightMargin; - break; - default: - childLeft = parentLeft + lp.leftMargin; - } - - switch (verticalGravity) { - case Gravity.TOP: - childTop = parentTop + lp.topMargin; - break; - case Gravity.CENTER_VERTICAL: - childTop = parentTop + (parentBottom - parentTop + lp.topMargin + - lp.bottomMargin - height) / 2; - 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); - - final Drawable foreground = mForeground; - if (foreground != null) { - final Rect selfBounds = mSelfBounds; - final Rect overlayBounds = mOverlayBounds; - - selfBounds.set(0, 0, w, h); - Gravity.apply(mForegroundGravity, foreground.getIntrinsicWidth(), - foreground.getIntrinsicHeight(), selfBounds, overlayBounds); - - foreground.setBounds(overlayBounds); - } - } - - /** - * {@inheritDoc} - */ - @Override - public void draw(Canvas canvas) { - super.draw(canvas); - - if (mForeground != null) { - mForeground.draw(canvas); - } - } - - /** - * {@inheritDoc} - */ - @Override - public boolean gatherTransparentRegion(Region region) { - boolean opaque = super.gatherTransparentRegion(region); - if (region != null && mForeground != null) { - applyDrawableToTransparentRegion(mForeground, region); - } - return opaque; - } - - /** - * Determines whether to measure 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. - * - * @attr ref android.R.styleable#FrameLayout_measureAllChildren - */ - @android.view.RemotableViewMethod - public void setMeasureAllChildren(boolean measureAll) { - mMeasureAllChildren = measureAll; - } - - /** - * Determines whether to measure all children or just those in - * the VISIBLE or INVISIBLE state when measuring. - */ - public boolean getConsiderGoneChildrenWhenMeasuring() { - return mMeasureAllChildren; - } - - /** - * {@inheritDoc} - */ - @Override - public LayoutParams generateLayoutParams(AttributeSet attrs) { - return new FrameLayout.LayoutParams(getContext(), 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); - } - - /** - * Per-child layout information for layouts that support margins. - * See {@link android.R.styleable#FrameLayout_Layout FrameLayout Layout Attributes} - * for a list of all child view attributes that this class supports. - */ - public static class LayoutParams extends MarginLayoutParams { - /** - * The gravity to apply with the View to which these layout parameters - * are associated. - * - * @see android.view.Gravity - */ - public int gravity = -1; - - /** - * {@inheritDoc} - */ - public LayoutParams(Context c, AttributeSet attrs) { - super(c, attrs); - - TypedArray a = c.obtainStyledAttributes(attrs, com.android.internal.R.styleable.FrameLayout_Layout); - gravity = a.getInt(com.android.internal.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 #FILL_PARENT}, - * {@link #WRAP_CONTENT} or a fixed size in pixels - * @param height the height, either {@link #FILL_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); - } - - /** - * {@inheritDoc} - */ - public LayoutParams(ViewGroup.MarginLayoutParams source) { - super(source); - } - } -} - |