Merge "Tabs are resized to make sure they fit in their parent." into honeycomb (c1eb127f) · Commits · e / os / android_frameworks_base

core/java/android/widget/TabWidget.java

+50 −36

Original line number	Diff line number	Diff line
		@@ -66,6 +66,10 @@ public class TabWidget extends LinearLayout implements OnFocusChangeListener {

		private final Rect mBounds = new Rect();

		// When positive, the widths and heights of tabs will be imposed so that they fit in parent
		private int mImposedTabsHeight = -1;
		private int[] mImposedTabWidths;

		public TabWidget(Context context) {
		this(context, null);
		}
		@@ -150,52 +154,62 @@ public class TabWidget extends LinearLayout implements OnFocusChangeListener {
		setOnFocusChangeListener(this);
		}

		/**
		* {@inheritDoc}
		*/
		@Override
		void measureChildBeforeLayout(View child, int childIndex,
		int widthMeasureSpec, int totalWidth,
		int heightMeasureSpec, int totalHeight) {

		if (mImposedTabsHeight >= 0) {
		widthMeasureSpec = MeasureSpec.makeMeasureSpec(
		totalWidth + mImposedTabWidths[childIndex], MeasureSpec.EXACTLY);
		heightMeasureSpec = MeasureSpec.makeMeasureSpec(mImposedTabsHeight,
		MeasureSpec.EXACTLY);
		}

		super.measureChildBeforeLayout(child, childIndex,
		widthMeasureSpec, totalWidth, heightMeasureSpec, totalHeight);
		}

		@Override
		void measureHorizontal(int widthMeasureSpec, int heightMeasureSpec) {
		// First measure with no constraint
		// First, measure with no constraint
		final int unspecifiedWidth = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
		super.measureHorizontal(unspecifiedWidth, heightMeasureSpec);
		mImposedTabsHeight = -1;

		int extraWidth = getMeasuredWidth() - MeasureSpec.getSize(widthMeasureSpec);
		if (extraWidth > 0) {
		final int count = getChildCount();
		int totalWidth = 0;
		int totalCount = 0;

		int childCount = 0;
		for (int i = 0; i < count; i++) {
		final View child = getChildAt(i);
		if (child.getVisibility() == GONE) {
		continue;
		}
		final int childWidth = child.getMeasuredWidth();
		totalWidth += childWidth;
		totalCount++;
		if (child.getVisibility() == GONE) continue;
		childCount++;
		}

		final int width = MeasureSpec.getSize(widthMeasureSpec);
		if (totalWidth > width && totalCount > 0) {
		int extraWidth = totalWidth - width;
		if (childCount > 0) {
		if (mImposedTabWidths == null \|\| mImposedTabWidths.length != count) {
		mImposedTabWidths = new int[count];
		}
		for (int i = 0; i < count; i++) {
		final View child = getChildAt(i);
		if (child.getVisibility() == GONE) {
		continue;
		}
		if (child.getVisibility() == GONE) continue;
		final int childWidth = child.getMeasuredWidth();
		final int delta = extraWidth / totalCount;
		final int tabWidth = Math.max(0, childWidth - delta);

		final int tabWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
		tabWidth, MeasureSpec.EXACTLY);
		final int tabHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
		child.getMeasuredHeight(), MeasureSpec.EXACTLY);

		child.measure(tabWidthMeasureSpec, tabHeightMeasureSpec);

		// Make sure the extra width is evenly distributed, avoiding int division remainder
		extraWidth -= delta;
		totalCount--;
		final int delta = extraWidth / childCount;
		final int newWidth = Math.max(0, childWidth - delta);
		mImposedTabWidths[i] = newWidth;
		// Make sure the extra width is evenly distributed, no int division remainder
		extraWidth -= childWidth - newWidth; // delta may have been clamped
		childCount--;
		mImposedTabsHeight = Math.max(mImposedTabsHeight, child.getMeasuredHeight());
		}
		}
		setMeasuredDimension(width, getMeasuredHeight());
		}

		// Measure again, this time with imposed tab widths and respecting initial spec request
		if (mImposedTabsHeight >= 0 \|\| unspecifiedWidth != widthMeasureSpec) {
		super.measureHorizontal(widthMeasureSpec, heightMeasureSpec);
		}
		}