Example usage for android.graphics Canvas save

Introduction

In this page you can find the example usage for android.graphics Canvas save.

Prototype

public int save() 

Source Link

Document

Saves the current matrix and clip onto a private stack.

Usage

From source file:com.android.mail.ui.FolderDisplayer.java

public static void drawFolder(Canvas canvas, float x, float y, int width, int height, String name, int fgColor,
        int bgColor, FolderDisplayer.FolderDrawableResources res, BidiFormatter formatter, Paint paint) {
    canvas.save();
    canvas.translate(x, y + res.folderVerticalOffset);

    // Draw the box.
    paint.setColor(bgColor);//from  ww  w  .  j ava  2s . c om
    paint.setStyle(Paint.Style.FILL);
    final RectF rect = new RectF(0, 0, width, height);
    canvas.drawRoundRect(rect, res.folderRoundedCornerRadius, res.folderRoundedCornerRadius, paint);

    // Draw the text based on the language locale and layout direction.
    paint.setColor(fgColor);
    paint.setStyle(Paint.Style.FILL);

    // Compute the text/gradient indices
    final int textLength = (int) paint.measureText(name);
    final int gradientX0;
    final int gradientX1;
    final int textX;

    /***************************************************************************************************
     * width               - the actual folder chip rectangle.                                         *
     * textLength          - the length of the folder's full name (can be longer than                  *
     *                         the actual chip, which is what overflow gradient is for).               *
     * innerPadding        - the padding between the text and the chip edge.                           *
     * overflowPadding     - the padding between start of overflow and the chip edge.                  *
     *                                                                                                 *
     *                                                                                                 *
     * text is in a RTL language                                                                       *
     *                                                                                                 *
     *                   index-0                                                                       *
     *                      |<---------------------------- width ---------------------------->|        *
     *        |<-------------------------textLength------------------>|                       |        *
     *        |             |<----- overflowPadding ----->|                                   |        *
     *        |             |<- innerPadding ->|<-------->|<--------->|<- horizontalPadding ->|        *
     *       textX                            gX1        gX0                                           *
     *                                                                                                 *
     *                                                                                                 *
     * text is in a LTR language.                                                                      *
     *                                                                                                 *
     *     index-0                                                                                     *
     *        |<------------------------------ width ------------------------------->|                 *
     *        |                       |<-------------------------textLength-------------------->|      *
     *        |                                   |<-------- overflowPadding ------->|                 *
     *        |<- horizontalPadding ->|<--------->|<-------->|<- horizontalPadding ->|                 *
     *                              textX        gX0        gX1                                        *
     *                                                                                                 *
     **************************************************************************************************/
    if (formatter.isRtl(name)) {
        gradientX0 = res.overflowGradientPadding;
        gradientX1 = res.folderHorizontalPadding;
        textX = width - res.folderHorizontalPadding - textLength;
    } else {
        gradientX0 = width - res.overflowGradientPadding;
        gradientX1 = width - res.folderHorizontalPadding;
        textX = res.folderHorizontalPadding;
    }

    // Draw the text and the possible overflow gradient
    // Overflow happens when the text is longer than the chip width minus side paddings.
    if (textLength > width - 2 * res.folderHorizontalPadding) {
        final Shader shader = new LinearGradient(gradientX0, 0, gradientX1, 0, fgColor,
                Utils.getTransparentColor(fgColor), Shader.TileMode.CLAMP);
        paint.setShader(shader);
    }
    final int textY = height / 2 - (int) (paint.descent() + paint.ascent()) / 2;
    canvas.drawText(name, textX, textY, paint);
    paint.setShader(null);

    canvas.restore();
}

---

From source file:Main.java

public static Bitmap addLabelToBitmap(Bitmap src, String label) {
    float densityFactor = Resources.getSystem().getDisplayMetrics().density;
    final float textPadding = src.getWidth() * 0.05f;

    Bitmap result = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(result);
    Paint textPaint = new Paint();
    textPaint.setAntiAlias(true);// w  ww.  j  a va  2s.co  m
    textPaint.setTextSize(12 * densityFactor);
    textPaint.setColor(Color.WHITE);
    textPaint.setStrokeWidth(2 * densityFactor);
    textPaint.setShadowLayer(1 * densityFactor, 0, 0, Color.BLACK);

    float textWidth = textPaint.measureText(label);

    float scaleFactor = (src.getWidth() - textPadding * 2) / textWidth;

    canvas.drawBitmap(src, 0, 0, textPaint);

    canvas.save();
    canvas.scale(scaleFactor, scaleFactor);
    float textPosX = (src.getWidth() / scaleFactor - textWidth) / 2;
    float textPosY = (src.getHeight() - textPadding) / scaleFactor;

    canvas.drawText(label, textPosX, textPosY, textPaint);
    canvas.restore();
    return result;
}

---

From source file:Main.java

public static void drawWallpaperSelectionFrame(Canvas canvas, RectF cropBounds, float spotX, float spotY,
        Paint p, Paint shadowPaint) {
    float sx = cropBounds.width() * spotX;
    float sy = cropBounds.height() * spotY;
    float cx = cropBounds.centerX();
    float cy = cropBounds.centerY();
    RectF r1 = new RectF(cx - sx / 2, cy - sy / 2, cx + sx / 2, cy + sy / 2);
    float temp = sx;
    sx = sy;//from ww  w  .  ja va  2s . c o m
    sy = temp;
    RectF r2 = new RectF(cx - sx / 2, cy - sy / 2, cx + sx / 2, cy + sy / 2);
    canvas.save();
    canvas.clipRect(cropBounds);
    canvas.clipRect(r1, Region.Op.DIFFERENCE);
    canvas.clipRect(r2, Region.Op.DIFFERENCE);
    canvas.drawPaint(shadowPaint);
    canvas.restore();
    Path path = new Path();
    path.moveTo(r1.left, r1.top);
    path.lineTo(r1.right, r1.top);
    path.moveTo(r1.left, r1.top);
    path.lineTo(r1.left, r1.bottom);
    path.moveTo(r1.left, r1.bottom);
    path.lineTo(r1.right, r1.bottom);
    path.moveTo(r1.right, r1.top);
    path.lineTo(r1.right, r1.bottom);
    path.moveTo(r2.left, r2.top);
    path.lineTo(r2.right, r2.top);
    path.moveTo(r2.right, r2.top);
    path.lineTo(r2.right, r2.bottom);
    path.moveTo(r2.left, r2.bottom);
    path.lineTo(r2.right, r2.bottom);
    path.moveTo(r2.left, r2.top);
    path.lineTo(r2.left, r2.bottom);
    canvas.drawPath(path, p);
}

---

From source file:Main.java

public static Bitmap getMosaic(Bitmap bitmap) {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int radius = 10;

    Bitmap mosaicBitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Canvas canvas = new Canvas(mosaicBitmap);

    int horCount = (int) Math.ceil(width / (float) radius);
    int verCount = (int) Math.ceil(height / (float) radius);

    Paint paint = new Paint();
    paint.setAntiAlias(true);/*from  w w w.  j a  v  a 2s  .co m*/

    for (int horIndex = 0; horIndex < horCount; ++horIndex) {
        for (int verIndex = 0; verIndex < verCount; ++verIndex) {
            int l = radius * horIndex;
            int t = radius * verIndex;
            int r = l + radius;
            if (r > width) {
                r = width;
            }
            int b = t + radius;
            if (b > height) {
                b = height;
            }
            int color = bitmap.getPixel(l, t);
            Rect rect = new Rect(l, t, r, b);
            paint.setColor(color);
            canvas.drawRect(rect, paint);
        }
    }
    canvas.save();

    return mosaicBitmap;
}

---

From source file:Main.java

/**
 * Draw a straight line through the points
 *//* w  ww .j  a v a  2s  .c om*/
public void drawLine(PointF p1, PointF p2, Canvas canvas, Paint paint) {
    canvas.save();
    canvas.drawLine(p1.x, p1.y, p2.x, p2.y, paint);
    canvas.restore();
}

---

From source file:app.philm.in.view.BackdropImageView.java

@Override
protected void onDraw(Canvas canvas) {
    if (mOffset != 0) {
        canvas.save();
        canvas.translate(0f, mOffset);// w  ww.ja v a  2 s. co  m
        canvas.clipRect(0f, 0f, canvas.getWidth(), canvas.getHeight() + mOffset);
        super.onDraw(canvas);
        canvas.restore();
    } else {
        super.onDraw(canvas);
    }
}

---

From source file:net.simno.klingar.ui.widget.DividerItemDecoration.java

private void drawVertical(Canvas canvas, RecyclerView parent) {
    canvas.save();
    // Drawable width defines left/right padding. Drawable height defines divider height.
    final int left = parent.getPaddingStart() + divider.getIntrinsicWidth();
    final int right = parent.getWidth() - parent.getPaddingEnd() - divider.getIntrinsicWidth();

    final int childCount = parent.getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View child = parent.getChildAt(i);
        parent.getDecoratedBoundsWithMargins(child, bounds);
        final int bottom = bounds.bottom + Math.round(ViewCompat.getTranslationY(child));
        final int top = bottom - divider.getIntrinsicHeight();
        divider.setBounds(left, top, right, bottom);
        divider.draw(canvas);/*  www.ja  v  a  2  s . c  o m*/
    }
    canvas.restore();
}

---

From source file:com.ahamed.sample.common.decorator.ArticleItemDecorator.java

@SuppressLint("NewApi")
private void draw(Canvas canvas, RecyclerView parent, View child) {
    canvas.save();
    final int left;
    final int right;
    if (parent.getClipToPadding()) {
        left = parent.getPaddingLeft();//from  ww w  .j av  a 2 s . com
        right = parent.getWidth() - parent.getPaddingRight();
        canvas.clipRect(left, parent.getPaddingTop(), right, parent.getHeight() - parent.getPaddingBottom());
    } else {
        left = 0;
        right = parent.getWidth();
    }

    parent.getDecoratedBoundsWithMargins(child, mBounds);
    final int bottom = mBounds.bottom + Math.round(ViewCompat.getTranslationY(child));
    final int top = bottom - 16;

    canvas.drawRect(left, top, right, bottom, myPaint);
    canvas.restore();
}

---

From source file:com.ahamed.sample.common.decorator.ThickItemDecorator.java

@SuppressLint("NewApi")
private void drawVertical(Canvas canvas, RecyclerView parent, View child) {
    canvas.save();
    final int left;
    final int right;
    if (parent.getClipToPadding()) {
        left = parent.getPaddingLeft();//from   w  ww .j  a  va2  s.co m
        right = parent.getWidth() - parent.getPaddingRight();
        canvas.clipRect(left, parent.getPaddingTop(), right, parent.getHeight() - parent.getPaddingBottom());
    } else {
        left = 0;
        right = parent.getWidth();
    }

    parent.getDecoratedBoundsWithMargins(child, mBounds);
    final int bottom = mBounds.bottom + Math.round(ViewCompat.getTranslationY(child));
    final int top = bottom - mDivider.getIntrinsicHeight() * 4;
    mDivider.setBounds(left, top, right, bottom);
    mDivider.draw(canvas);
    canvas.restore();
}

---

From source file:com.google.android.marvin.utils.HighlightBoundsView.java

@Override
public void onDraw(Canvas c) {
    final int saveCount = c.save();
    c.translate(-SCREEN_LOCATION[0], -SCREEN_LOCATION[1]);
    c.setMatrix(mMatrix);/*  w  w w  . j  a v a 2s  .  c  o  m*/

    mPaint.setColor(mHighlightColor);

    for (AccessibilityNodeInfoCompat node : mNodes) {
        node.getBoundsInScreen(mTemp);
        c.drawRect(mTemp, mPaint);
    }

    c.restoreToCount(saveCount);
}

---

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