Example usage for android.graphics Rect isEmpty

Introduction

In this page you can find the example usage for android.graphics Rect isEmpty.

Prototype

public final boolean isEmpty() 

Source Link

Document

Returns true if the rectangle is empty (left >= right or top >= bottom)

Usage

From source file:Main.java

public static Bitmap asBitmap(Drawable drawable, int minWidth, int minHeight) {
    final Rect tmpRect = new Rect();
    drawable.copyBounds(tmpRect);//from   w  ww  .  j av a  2s . co m
    if (tmpRect.isEmpty()) {
        tmpRect.set(0, 0, Math.max(minWidth, drawable.getIntrinsicWidth()),
                Math.max(minHeight, drawable.getIntrinsicHeight()));
        drawable.setBounds(tmpRect);
    }
    Bitmap bitmap = Bitmap.createBitmap(tmpRect.width(), tmpRect.height(), Bitmap.Config.ARGB_8888);
    drawable.draw(new Canvas(bitmap));
    return bitmap;
}

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From source file:Main.java

/**
 * The most useful answer about text drawing ever. http://stackoverflow.com/a/32081250
 *///w  w  w. ja  va  2 s.  c om
@Nullable
public static Bitmap createTypefaceBitmap(final Context context, @NonNull final String text, final int color,
        final float textSizePx) {
    final Typeface robotoMedium = Typeface.createFromAsset(context.getAssets(), "fonts/Roboto-Medium.ttf");

    final Paint paint = new Paint();
    paint.setAntiAlias(true);
    paint.setSubpixelText(true);
    paint.setTypeface(robotoMedium);
    paint.setStyle(Paint.Style.FILL);
    paint.setColor(color);
    paint.setTextSize(textSizePx);

    final Rect bounds = new Rect();
    paint.getTextBounds(text, 0, text.length(), bounds);

    Bitmap bitmap = null;
    if (!bounds.isEmpty()) {
        final int width = bounds.width();
        final int height = bounds.height();

        bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_4444);

        final float x = bounds.left;
        final float y = height - bounds.bottom;

        final Canvas canvas = new Canvas(bitmap);
        canvas.drawText(text, x, y, paint);
    }

    return bitmap;
}

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From source file:com.facebook.litho.utils.IncrementalMountUtils.java

private static void maybePerformIncrementalMountOnView(int scrollingParentWidth, int scrollingParentHeight,
        View view) {/*from  w w  w. j a v a  2  s. com*/
    final View underlyingView = view instanceof WrapperView ? ((WrapperView) view).getWrappedView() : view;

    if (!(underlyingView instanceof LithoView)) {
        return;
    }

    final LithoView lithoView = (LithoView) underlyingView;
    if (!lithoView.isIncrementalMountEnabled()) {
        return;
    }

    if (view != underlyingView && view.getHeight() != underlyingView.getHeight()) {
        throw new IllegalStateException(
                "ViewDiagnosticsWrapper must be the same height as the underlying view");
    }

    final int translationX = (int) view.getTranslationX();
    final int translationY = (int) view.getTranslationY();
    final int top = view.getTop() + translationY;
    final int bottom = view.getBottom() + translationY;
    final int left = view.getLeft() + translationX;
    final int right = view.getRight() + translationX;

    if (left >= 0 && top >= 0 && right <= scrollingParentWidth && bottom <= scrollingParentHeight
            && lithoView.getPreviousMountBounds().width() == lithoView.getWidth()
            && lithoView.getPreviousMountBounds().height() == lithoView.getHeight()) {
        // View is fully visible, and has already been completely mounted.
        return;
    }

    final Rect rect = acquireRect();
    rect.set(Math.max(0, -left), Math.max(0, -top), Math.min(right, scrollingParentWidth) - left,
            Math.min(bottom, scrollingParentHeight) - top);

    if (rect.isEmpty()) {
        // View is not visible at all, nothing to do.
        release(rect);
        return;
    }

    lithoView.performIncrementalMount(rect);

    release(rect);
}

---

From source file:com.android.yijiang.kzx.widget.betterpickers.TouchExplorationHelper.java

/**
 * Computes whether the specified {@link android.graphics.Rect} intersects with the visible portion of its parent
 * {@link android.view.View}. Modifies {@code localRect} to contain only the visible portion.
 *
 * @param localRect A rectangle in local (parent) coordinates.
 * @return Whether the specified {@link android.graphics.Rect} is visible on the screen.
 *///from  ww  w  .ja v  a 2 s .  c om
private boolean intersectVisibleToUser(Rect localRect) {
    // Missing or empty bounds mean this view is not visible.
    if ((localRect == null) || localRect.isEmpty()) {
        return false;
    }

    // Attached to invisible window means this view is not visible.
    if (mParentView.getWindowVisibility() != View.VISIBLE) {
        return false;
    }

    // An invisible predecessor or one with alpha zero means
    // that this view is not visible to the user.
    Object current = this;
    while (current instanceof View) {
        final View view = (View) current;
        // We have attach info so this view is attached and there is no
        // need to check whether we reach to ViewRootImpl on the way up.
        if ((view.getAlpha() <= 0) || (view.getVisibility() != View.VISIBLE)) {
            return false;
        }
        current = view.getParent();
    }

    // If no portion of the parent is visible, this view is not visible.
    if (!mParentView.getLocalVisibleRect(mTempVisibleRect)) {
        return false;
    }

    // Check if the view intersects the visible portion of the parent.
    return localRect.intersect(mTempVisibleRect);
}

---

From source file:org.holoeverywhere.widget.datetimepicker.TouchExplorationHelper.java

/**
 * Computes whether the specified {@link Rect} intersects with the visible
 * portion of its parent {@link View}. Modifies {@code localRect} to
 * contain only the visible portion.// w  ww  .  j a  va  2  s . c om
 *
 * @param localRect A rectangle in local (parent) coordinates.
 * @return Whether the specified {@link Rect} is visible on the screen.
 */
private boolean intersectVisibleToUser(Rect localRect) {
    // Missing or empty bounds mean this view is not visible.
    if ((localRect == null) || localRect.isEmpty()) {
        return false;
    }

    // Attached to invisible window means this view is not visible.
    if (mParentView.getWindowVisibility() != View.VISIBLE) {
        return false;
    }

    // An invisible predecessor or one with alpha zero means
    // that this view is not visible to the user.
    Object current = this;
    while (current instanceof View) {
        final View view = (View) current;
        // We have attach info so this view is attached and there is no
        // need to check whether we reach to ViewRootImpl on the way up.

        if ((ViewHelper.getAlpha(view) <= 0) || (view.getVisibility() != View.VISIBLE)) {
            return false;
        }
        current = view.getParent();
    }

    // If no portion of the parent is visible, this view is not visible.
    if (!mParentView.getLocalVisibleRect(mTempVisibleRect)) {
        return false;
    }

    // Check if the view intersects the visible portion of the parent.
    return localRect.intersect(mTempVisibleRect);
}

---

From source file:com.doomonafireball.betterpickers.TouchExplorationHelper.java

/**
 * Computes whether the specified {@link android.graphics.Rect} intersects
 * with the visible portion of its parent {@link android.view.View}.
 * Modifies {@code localRect} to contain only the visible portion.
 * //from  w w w .j ava  2  s. c om
 * @param localRect
 *            A rectangle in local (parent) coordinates.
 * @return Whether the specified {@link android.graphics.Rect} is visible on
 *         the screen.
 */
@SuppressLint("NewApi")
private boolean intersectVisibleToUser(Rect localRect) {
    // Missing or empty bounds mean this view is not visible.
    if ((localRect == null) || localRect.isEmpty()) {
        return false;
    }

    // Attached to invisible window means this view is not visible.
    if (mParentView.getWindowVisibility() != View.VISIBLE) {
        return false;
    }

    // An invisible predecessor or one with alpha zero means
    // that this view is not visible to the user.
    Object current = this;
    while (current instanceof View) {
        final View view = (View) current;
        // We have attach info so this view is attached and there is no
        // need to check whether we reach to ViewRootImpl on the way up.
        if ((view.getAlpha() <= 0) || (view.getVisibility() != View.VISIBLE)) {
            return false;
        }
        current = view.getParent();
    }

    // If no portion of the parent is visible, this view is not visible.
    if (!mParentView.getLocalVisibleRect(mTempVisibleRect)) {
        return false;
    }

    // Check if the view intersects the visible portion of the parent.
    return localRect.intersect(mTempVisibleRect);
}

---

From source file:android.support.transition.FragmentTransitionSupport.java

@Override
public void setEpicenter(Object transitionObj, final Rect epicenter) {
    if (transitionObj != null) {
        Transition transition = (Transition) transitionObj;
        transition.setEpicenterCallback(new Transition.EpicenterCallback() {
            @Override//from  www . j av a  2  s. c om
            public Rect onGetEpicenter(@NonNull Transition transition) {
                if (epicenter == null || epicenter.isEmpty()) {
                    return null;
                }
                return epicenter;
            }
        });
    }
}

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From source file:com.android.utils.ExploreByTouchHelper.java

/**
 * Computes whether the specified {@link Rect} intersects with the visible
 * portion of its parent {@link View}. Modifies {@code localRect} to contain
 * only the visible portion./*  w  ww. ja  va2  s . c  om*/
 *
 * @param localRect A rectangle in local (parent) coordinates.
 * @return Whether the specified {@link Rect} is visible on the screen.
 */
private boolean intersectVisibleToUser(Rect localRect) {
    // Missing or empty bounds mean this view is not visible.
    if ((localRect == null) || localRect.isEmpty()) {
        return false;
    }

    // Attached to invisible window means this view is not visible.
    if (mHost.getWindowVisibility() != View.VISIBLE) {
        return false;
    }

    // An invisible predecessor or one with alpha zero means
    // that this view is not visible to the user.
    Object current = this;
    while (current instanceof View) {
        final View view = (View) current;
        // We have attach info so this view is attached and there is no
        // need to check whether we reach to ViewRootImpl on the way up.
        if ((view.getAlpha() <= 0) || (view.getVisibility() != View.VISIBLE)) {
            return false;
        }
        current = view.getParent();
    }

    // If no portion of the parent is visible, this view is not visible.
    if (!mHost.getLocalVisibleRect(mTempVisibleRect)) {
        return false;
    }

    // Check if the view intersects the visible portion of the parent.
    return localRect.intersect(mTempVisibleRect);
}

---

From source file:com.facebook.litho.LithoView.java

private void maybePerformIncrementalMountOnView() {
    if (!mIncrementalMountOnOffsetOrTranslationChange
            && !ComponentsConfiguration.isIncrementalMountOnOffsetOrTranslationChangeEnabled) {
        return;/*from   ww  w . j  a v a  2 s.co m*/
    }

    if (!isIncrementalMountEnabled() || !(getParent() instanceof View)) {
        return;
    }

    int parentWidth = ((View) getParent()).getWidth();
    int parentHeight = ((View) getParent()).getHeight();

    final int translationX = (int) getTranslationX();
    final int translationY = (int) getTranslationY();
    final int top = getTop() + translationY;
    final int bottom = getBottom() + translationY;
    final int left = getLeft() + translationX;
    final int right = getRight() + translationX;

    if (left >= 0 && top >= 0 && right <= parentWidth && bottom <= parentHeight
            && mPreviousMountBounds.width() == getWidth() && mPreviousMountBounds.height() == getHeight()) {
        // View is fully visible, and has already been completely mounted.
        return;
    }

    final Rect rect = ComponentsPools.acquireRect();
    rect.set(Math.max(0, -left), Math.max(0, -top), Math.min(right, parentWidth) - left,
            Math.min(bottom, parentHeight) - top);

    if (rect.isEmpty()) {
        // View is not visible at all, nothing to do.
        ComponentsPools.release(rect);
        return;
    }

    performIncrementalMount(rect);

    ComponentsPools.release(rect);
}

---

From source file:com.facebook.litho.MountState.java

private static int computeRectArea(Rect rect) {
    return rect.isEmpty() ? 0 : (rect.width() * rect.height());
}

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