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PseudoGridView.javaAPI DocAndroid 5.1 API7682Thu Mar 12 22:22:42 GMT 2015com.android.systemui.qs

PseudoGridView

public class PseudoGridView extends android.view.ViewGroup
A view that arranges it's children in a grid with a fixed number of evenly spaced columns. {@see android.widget.GridView}

Fields Summary
private int
mNumColumns
private int
mVerticalSpacing
private int
mHorizontalSpacing
Constructors Summary
public PseudoGridView(android.content.Context context, android.util.AttributeSet attrs)


         
        super(context, attrs);

        final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PseudoGridView);

        final int N = a.getIndexCount();
        for (int i = 0; i < N; i++) {
            int attr = a.getIndex(i);
            switch (attr) {
                case R.styleable.PseudoGridView_numColumns:
                    mNumColumns = a.getInt(attr, 3);
                    break;
                case R.styleable.PseudoGridView_verticalSpacing:
                    mVerticalSpacing = a.getDimensionPixelSize(attr, 0);
                    break;
                case R.styleable.PseudoGridView_horizontalSpacing:
                    mHorizontalSpacing = a.getDimensionPixelSize(attr, 0);
                    break;
            }
        }

        a.recycle();
Methods Summary
protected voidonLayout(boolean changed, int l, int t, int r, int b)

        boolean isRtl = isLayoutRtl();
        int children = getChildCount();
        int rows = (children + mNumColumns - 1) / mNumColumns;
        int y = 0;
        for (int row = 0; row < rows; row++) {
            int x = isRtl ? getWidth() : 0;
            int maxHeight = 0;
            int startOfRow = row * mNumColumns;
            int endOfRow = Math.min(startOfRow + mNumColumns, children);
            for (int i = startOfRow; i < endOfRow; i++) {
                View child = getChildAt(i);
                int width = child.getMeasuredWidth();
                int height = child.getMeasuredHeight();
                if (isRtl) {
                    x -= width;
                }
                child.layout(x, y, x + width, y + height);
                maxHeight = Math.max(maxHeight, height);
                if (isRtl) {
                    x -= mHorizontalSpacing;
                } else {
                    x += width + mHorizontalSpacing;
                }
            }
            y += maxHeight;
            if (row > 0) {
                y += mVerticalSpacing;
            }
        }
protected voidonMeasure(int widthMeasureSpec, int heightMeasureSpec)

        if (MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.UNSPECIFIED) {
            throw new UnsupportedOperationException("Needs a maximum width");
        }
        int width = MeasureSpec.getSize(widthMeasureSpec);

        int childWidth = (width - (mNumColumns - 1) * mHorizontalSpacing) / mNumColumns;
        int childWidthSpec = MeasureSpec.makeMeasureSpec(childWidth, MeasureSpec.EXACTLY);
        int childHeightSpec = MeasureSpec.UNSPECIFIED;
        int totalHeight = 0;
        int children = getChildCount();
        int rows = (children + mNumColumns - 1) / mNumColumns;
        for (int row = 0; row < rows; row++) {
            int startOfRow = row * mNumColumns;
            int endOfRow = Math.min(startOfRow + mNumColumns, children);
            int maxHeight = 0;
            for (int i = startOfRow; i < endOfRow; i++) {
                View child = getChildAt(i);
                child.measure(childWidthSpec, childHeightSpec);
                maxHeight = Math.max(maxHeight, child.getMeasuredHeight());
            }
            int maxHeightSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.EXACTLY);
            for (int i = startOfRow; i < endOfRow; i++) {
                View child = getChildAt(i);
                if (child.getMeasuredHeight() != maxHeight) {
                    child.measure(childWidthSpec, maxHeightSpec);
                }
            }
            totalHeight += maxHeight;
            if (row > 0) {
                totalHeight += mVerticalSpacing;
            }
        }

        setMeasuredDimension(width, getDefaultSize(totalHeight, heightMeasureSpec));