Example usage for android.graphics SweepGradient setLocalMatrix

Introduction

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

Prototype

public void setLocalMatrix(@Nullable Matrix localM) 

Source Link

Document

Set the shader's local matrix.

Usage

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  w w  w. j  a v  a 2s  .  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);
}

---

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

private void updateBorderShader() {
    final int[] colors = mBorderColors;
    if (colors == null || colors.length == 0) {
        mBorderAlpha = 0;//from   w  w  w.j  ava  2s.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);
}

---

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

/**
 * Method to drawing the gradient color for the arc
 *//* w  ww  .  j ava2 s  . c o  m*/
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);
}

---