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Merge "Tabs are resized to make sure they fit in their parent." into honeycomb

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This commit is contained in:
Gilles Debunne
2011-01-31 12:01:34 -08:00
committed by Android (Google) Code Review
parent 4f63da64d8 c4d3f759dd
commit c1eb127f4e
1 changed files with 53 additions and 39 deletions
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92
core/java/android/widget/TabWidget.java
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@@ -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 measureHorizontal(int widthMeasureSpec, int heightMeasureSpec) {
// First measure with no constraint
final int unspecifiedWidth = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
super.measureHorizontal(unspecifiedWidth, heightMeasureSpec);
void measureChildBeforeLayout(View child, int childIndex,
int widthMeasureSpec, int totalWidth,
int heightMeasureSpec, int totalHeight) {
final int count = getChildCount();
int totalWidth = 0;
int totalCount = 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 (mImposedTabsHeight >= 0) {
widthMeasureSpec = MeasureSpec.makeMeasureSpec(
totalWidth + mImposedTabWidths[childIndex], MeasureSpec.EXACTLY);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(mImposedTabsHeight,
MeasureSpec.EXACTLY);
}
final int width = MeasureSpec.getSize(widthMeasureSpec);
if (totalWidth > width && totalCount > 0) {
int extraWidth = totalWidth - width;
super.measureChildBeforeLayout(child, childIndex,
widthMeasureSpec, totalWidth, heightMeasureSpec, totalHeight);
}
@Override
void measureHorizontal(int widthMeasureSpec, int heightMeasureSpec) {
// 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 childCount = 0;
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
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--;
if (child.getVisibility() == GONE) continue;
childCount++;
}
setMeasuredDimension(width, getMeasuredHeight());
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;
final int childWidth = child.getMeasuredWidth();
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());
}
}
}
// Measure again, this time with imposed tab widths and respecting initial spec request
if (mImposedTabsHeight >= 0 || unspecifiedWidth != widthMeasureSpec) {
super.measureHorizontal(widthMeasureSpec, heightMeasureSpec);
}
}