private void createViewMetrics(Stack<ViewConstraints> springMetrics) {
springMetrics.clear();
mIdToViewConstraints.clear();
if (mRootConstraints != null) {
mRootConstraints.release();
for (ViewConstraints mViewConstraint : mViewConstraints) {
mViewConstraint.release();
}
mRootConstraints.reset(this);
resizeViewConstraintsArray(getChildCount());
} else {
mRootConstraints = new ViewConstraints(this, mLayoutMath);
mViewConstraints = new ViewConstraints[getChildCount()];
}
mRootConstraints.left.setValueObject(mLayoutMath.variable(0));
mRootConstraints.top.setValueObject(mLayoutMath.variable(0));
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View v = getChildAt(i);
mIdToViewConstraints.append(v.getId(), i);
if (mViewConstraints[i] == null) {
mViewConstraints[i] = new ViewConstraints(v, mLayoutMath);
} else {
mViewConstraints[i].reset(v);
}
}
for (int i = 0; i < count; i++) {
final ViewConstraints viewConstraints = mViewConstraints[i];
final LayoutParams layoutParams = (LayoutParams) viewConstraints.getView().getLayoutParams();
if (layoutParams.getWidthWeight() > 0) {
viewConstraints.markAsHorizontalSpring();
}
if (layoutParams.getHeightWeight() > 0) {
viewConstraints.markAsVerticalSpring();
}
int[] childRules = layoutParams.getRelations();
for (int relation : VALID_RELATIONS) {
final ViewConstraints metrics = getViewMetrics(childRules[relation]);
if (metrics != null) {
metrics.updateRelation(viewConstraints, relation);
}
}
if (viewConstraints.isHorizontalSpring() || viewConstraints.isVerticalSpring()) {
springMetrics.add(viewConstraints);
}
}
}
private void adaptLayoutParameters() {
int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
final LayoutParams childParams = (LayoutParams) child.getLayoutParams();
int[] relations = childParams.getRelations();
if (childParams.getWidthWeight() > 0 && childParams.width != LayoutParams.WRAP_CONTENT) {
throw new IllegalArgumentException(
"widthWeight > 0 not supported for layout_width != WRAP_CONTENT in View: " + child);
}
if (childParams.getHeightWeight() > 0 && childParams.height != LayoutParams.WRAP_CONTENT) {
throw new IllegalArgumentException(
"heightWeight > 0 not supported for layout_height != WRAP_CONTENT in View: " + child);
}
// If view is aligned both to parent's top and bottom (left and
// right) then its height (width) is MATCH_PARENT and the other way
// around
if (relations[ALIGN_PARENT_TOP] != 0 && relations[ALIGN_PARENT_BOTTOM] != 0) {
childParams.height = LayoutParams.MATCH_PARENT;
} else if (childParams.height == LayoutParams.MATCH_PARENT) {
relations[ALIGN_PARENT_TOP] = relations[ALIGN_PARENT_BOTTOM] = TRUE;
}
if (relations[ALIGN_PARENT_LEFT] != 0 && relations[ALIGN_PARENT_RIGHT] != 0) {
childParams.width = LayoutParams.MATCH_PARENT;
} else if (childParams.width == LayoutParams.MATCH_PARENT) {
relations[ALIGN_PARENT_LEFT] = relations[ALIGN_PARENT_RIGHT] = TRUE;
}
if (relations[ALIGN_PARENT_TOP] == TRUE) {
relations[ALIGN_TOP] = PARENT;
}
if (relations[ALIGN_PARENT_BOTTOM] == TRUE) {
relations[ALIGN_BOTTOM] = PARENT;
}
if (relations[ALIGN_PARENT_LEFT] == TRUE) {
relations[ALIGN_LEFT] = PARENT;
}
if (relations[ALIGN_PARENT_RIGHT] == TRUE) {
relations[ALIGN_RIGHT] = PARENT;
}
if (relations[ALIGN_CENTER] != 0) {
relations[ALIGN_CENTER_HORIZONTALLY] = relations[ALIGN_CENTER];
relations[ALIGN_CENTER_VERTICALLY] = relations[ALIGN_CENTER];
}
if (relations[CENTER_IN_PARENT] == TRUE) {
relations[CENTER_HORIZONTAL] = relations[CENTER_VERTICAL] = TRUE;
}
if (relations[CENTER_HORIZONTAL] == TRUE) {
relations[ALIGN_CENTER_HORIZONTALLY] = PARENT;
}
if (relations[CENTER_VERTICAL] == TRUE) {
relations[ALIGN_CENTER_VERTICALLY] = PARENT;
}
if (!hasHorizontalRelations(relations)) {
relations[ALIGN_LEFT] = PARENT;
}
if (!hasVerticalRelations(relations)) {
relations[ALIGN_TOP] = PARENT;
}
}
}
