Example usage for android.graphics SweepGradient SweepGradient

Introduction

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

Prototype

public SweepGradient(float cx, float cy, @ColorInt int color0, @ColorInt int color1) 

Source Link

Document

A Shader that draws a sweep gradient around a center point.

Usage

From source file:Main.java

protected static void setSweepGradientGradientPaint(Paint paint, float width, float height, int colorStart,
        int colorEnd) {
    paint.setShader(new SweepGradient(width, height, colorStart, colorEnd));
    paint.setAntiAlias(true);//from w ww . ja v a 2  s. com
}

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From source file:com.skumar.flexibleciruclarseekbar.CircularSeekBar.java

/**
 * Method to drawing the gradient color for the arc
 *///from   w  ww  .ja  v  a2 s .  com
public void setShader() {
    SweepGradient sweepgradient = new SweepGradient(mArcRadius, mArcRadius, Color.parseColor("#2f8bca"),
            Color.parseColor("#c91200"));
    Matrix matrix = new Matrix();
    matrix.reset();
    sweepgradient.getLocalMatrix(matrix);
    matrix.postRotate(90, mArcRadius, mArcRadius);
    sweepgradient.setLocalMatrix(matrix);
    mArcPaint.setShader(sweepgradient);
    mNeedleScalePaint.setShader(sweepgradient);
}

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From source file:org.getlantern.firetweet.view.ShapedImageView.java

private void updateBorderShader() {
    final int[] colors = mBorderColors;
    if (colors == null || colors.length == 0) {
        mBorderAlpha = 0;/* w w w .java2  s  .c  om*/
        return;
    }
    mDestination.set(getPaddingLeft(), getPaddingTop(), getWidth() - getPaddingRight(),
            getHeight() - getPaddingBottom());
    final float cx = mDestination.centerX(), cy = mDestination.centerY();
    final int[] sweepColors = new int[colors.length * 2];
    final float[] positions = new float[colors.length * 2];
    for (int i = 0, j = colors.length; i < j; i++) {
        sweepColors[i * 2] = sweepColors[i * 2 + 1] = colors[i];
        positions[i * 2] = i == 0 ? 0 : i / (float) j;
        positions[i * 2 + 1] = i == j - 1 ? 1 : (i + 1) / (float) j;
    }
    final SweepGradient shader = new SweepGradient(cx, cy, sweepColors, positions);
    final Matrix matrix = new Matrix();
    matrix.setRotate(90, cx, cy);
    shader.setLocalMatrix(matrix);
    mBorderPaint.setShader(shader);
}

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From source file:de.vanita5.twittnuker.view.ShapedImageView.java

private void updateBorderShader() {
    final int[] colors = mBorderColors;
    if (colors == null || colors.length == 0) {
        mBorderPaint.setShader(null);//from ww w  .j a  v  a 2  s .c  o m
        return;
    }
    mDestination.set(getPaddingLeft(), getPaddingTop(), getWidth() - getPaddingRight(),
            getHeight() - getPaddingBottom());
    final float cx = mDestination.centerX(), cy = mDestination.centerY();
    final int[] sweepColors = new int[colors.length * 2];
    final float[] positions = new float[colors.length * 2];
    for (int i = 0, j = colors.length; i < j; i++) {
        sweepColors[i * 2] = sweepColors[i * 2 + 1] = colors[i];
        positions[i * 2] = i == 0 ? 0 : i / (float) j;
        positions[i * 2 + 1] = i == j - 1 ? 1 : (i + 1) / (float) j;
    }
    final SweepGradient shader = new SweepGradient(cx, cy, sweepColors, positions);
    final Matrix matrix = new Matrix();
    matrix.setRotate(90, cx, cy);
    shader.setLocalMatrix(matrix);
    mBorderPaint.setShader(shader);
}

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From source file:com.owen.view.views.PieChart.java

/**
 * Do all of the recalculations needed when the data array changes.
 *///from   ww  w.j  a  va  2  s.  c om
private void onDataChanged() {
    // When the data changes, we have to recalculate
    // all of the angles.
    int currentAngle = 0;
    for (Item it : mData) {
        it.mStartAngle = currentAngle;
        it.mEndAngle = (int) ((float) currentAngle + it.mValue * 360.0f / mTotal);
        currentAngle = it.mEndAngle;

        // Recalculate the gradient shaders. There are
        // three values in this gradient, even though only
        // two are necessary, in order to work around
        // a bug in certain versions of the graphics engine
        // that expects at least three values if the
        // positions array is non-null.
        //
        it.mShader = new SweepGradient(mPieBounds.width() / 2.0f, mPieBounds.height() / 2.0f,
                new int[] { it.mHighlight, it.mHighlight, it.mColor, it.mColor, }, new float[] { 0,
                        (float) (360 - it.mEndAngle) / 360.0f, (float) (360 - it.mStartAngle) / 360.0f, 1.0f });
    }
    calcCurrentItem();
    onScrollFinished();
}

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From source file:devlight.io.library.ArcProgressStackView.java

@Override
protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
    // Get measured sizes
    final int width = MeasureSpec.getSize(widthMeasureSpec);
    final int height = MeasureSpec.getSize(heightMeasureSpec);

    // Get size for square dimension
    if (width > height)
        mSize = height;//from   w w  w . ja v a2  s  .c o  m
    else
        mSize = width;

    // Get progress offsets
    final float divider = mDrawWidthFraction == 0 ? mDrawWidthDimension : mSize * mDrawWidthFraction;
    mProgressModelSize = divider / mModels.size();
    final float paintOffset = mProgressModelSize * 0.5F;
    final float shadowOffset = mIsShadowed ? (mShadowRadius + mShadowDistance) : 0.0F;

    // Set bound with offset for models
    for (int i = 0; i < mModels.size(); i++) {
        final Model model = mModels.get(i);
        final float modelOffset = (mProgressModelSize * i) + (paintOffset + shadowOffset)
                - (mProgressModelOffset * i);

        // Set bounds to progress
        model.mBounds.set(modelOffset, modelOffset, mSize - modelOffset, mSize - modelOffset);

        // Set sweep gradient shader
        if (model.getColors() != null)
            model.mSweepGradient = new SweepGradient(model.mBounds.centerX(), model.mBounds.centerY(),
                    model.getColors(), null);
    }

    // Set square measured dimension
    setMeasuredDimension(mSize, mSize);
}

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