Example usage for android.graphics Canvas drawLine

Introduction

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

Prototype

public void drawLine(float startX, float startY, float stopX, float stopY, @NonNull Paint paint) 

Source Link

Document

Draw a line segment with the specified start and stop x,y coordinates, using the specified paint.

Usage

From source file:com.dirkgassen.wator.ui.view.RangeSlider.java

/**
 * Draws the view/*from w ww.ja  v  a 2 s  .  c  o m*/
 * @param canvas canvas to paint on
 */
@Override
protected void onDraw(Canvas canvas) {
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    int sliderY = (getHeight() - paddingTop - paddingBottom) / 2 + paddingTop;

    canvas.drawLine(paddingLeft + thumbSize / 2, sliderY, getWidth() - paddingRight - thumbSize / 2, sliderY,
            sliderPaint);

    String valueString = String.format(Locale.getDefault(), thumbFormat, value);
    final float valueWidth = (thumbTextPaint.measureText(valueString, 0, valueString.length()));

    float thumbTip = positionFromValue(paddingLeft, paddingRight);
    if (thumbPath.isEmpty()) {
        thumbPath.addCircle(thumbTip, sliderY, thumbSize / 2, Path.Direction.CW);
    } else {
        thumbPath.offset(thumbTip, 0);
    }

    canvas.drawPath(thumbPath, thumbBackgroundPaint);

    canvas.drawText(valueString, thumbTip - valueWidth / 2, sliderY + (-thumbTextPaint.ascent()) / 2,
            thumbTextPaint);

    thumbPath.offset(-thumbTip, 0);
}

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From source file:kr.co.nqk.rfa.customview.PagerSlidingTabStrip.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (isInEditMode() || tabCount == 0) {
        return;/* www .  ja v a2s  .  c o  m*/
    }

    final int height = getHeight();

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }

    // draw underline

    rectPaint.setColor(underlineColor);
    if (indicatorTop) {
        canvas.drawRect(0, 0, tabsContainer.getWidth(), underlineHeight, rectPaint);
    } else {
        canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);
    }

    // draw indicator line

    rectPaint.setColor(indicatorColor);

    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    if (indicatorTop) {
        canvas.drawRect(lineLeft, 0, lineRight, indicatorHeight, rectPaint);
    } else {
        canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);
    }

}

---

From source file:com.richtodd.android.quiltdesign.block.PaperPiecedBlockPiece.java

private void renderShadow(Canvas canvas, RenderOptions renderOptions) {
    List<PointF> points = getPoints(renderOptions.getWidth(), renderOptions.getHeight());

    PointF fromPoint = points.get(0);/* www  .j  a  va2s.co  m*/
    PointF toPoint = points.get(1);

    if (fromPoint.y != 0f || toPoint.y != 0f) {
        float fromX = renderOptions.getLeft() + fromPoint.x;
        float fromY = renderOptions.getTop() + fromPoint.y;
        float toX = renderOptions.getLeft() + toPoint.x;
        float toY = renderOptions.getTop() + toPoint.y;

        canvas.drawLine(fromX, fromY, toX, toY, getShadowPaint(renderOptions.getLeft(), renderOptions.getTop(),
                renderOptions.getWidth(), renderOptions.getHeight(), 20));
    }
}

---

From source file:com.morninz.ninepinview.widget.NinePINView.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    // draw circles around center points and connection line
    int drawnCount = mDrawnPoints.size();
    for (int j = 0; j < drawnCount; j++) {
        Point p1 = mDrawnPoints.get(j);
        canvas.drawCircle(p1.x, p1.y, mCircleRadius, mCirclePaint);
        if (j + 1 < drawnCount) {
            Point p2 = mDrawnPoints.get(j + 1);
            canvas.drawCircle(p2.x, p2.y, mCircleRadius, mCirclePaint);
            canvas.drawLine(p1.x, p1.y, p2.x, p2.y, mLinePaint);
            if (mWillDrawWrongTriangle) {
                // compute the wrong triangle's direction of this point.
                float angle = 0.f;
                if (p2.y == p1.y) {// x-axis
                    angle = p2.x > p1.x ? 0.f : 180.f;
                } else if (p2.x == p1.x) { // y-axis
                    angle = p2.y > p1.y ? 90.f : -90.f;
                } else {// in quadrants
                    double tanA = ((double) p2.y - (double) p1.y) / ((double) p2.x - (double) p1.x);
                    // in 1 or 4 quadrant
                    angle = (float) (Math.atan(tanA) * 180 / Math.PI);
                    // in 2 or 3 quadrant
                    if (p2.x < p1.x) {
                        angle += 180.f;//from www.  j a v  a 2 s. c  o m
                    }
                }
                Log.d(TAG, "angle " + angle);
                canvas.save();
                canvas.rotate(angle, p1.x, p1.y);
                canvas.drawPath(mWrongPaths[p1.index], mWrongPaint);
                canvas.restore();
            }
        }
    }

    // draw extra connection line
    if (mLastDrawnPoint != null) {
        canvas.drawLine(mLastDrawnPoint.x, mLastDrawnPoint.y, mCurrX, mCurrY, mLinePaint);
    }

    // draw 9 center points
    for (int i = 0; i < POINT_COUNT; i++) {
        Point p = mCenterPoints[i];
        canvas.drawCircle(p.x, p.y, mPointSize, mPointPaint);
    }
}

---

From source file:com.ryann10.pagerslidingtabstripsample.PagerSlidingTabStrip.java

@Override
protected void dispatchDraw(Canvas canvas) {
    super.dispatchDraw(canvas);

    if (isInEditMode() || tabCount == 0) {
        return;//from w w  w .  j  a  v  a  2s.  c  o  m
    }

    final int height = getHeight();

    // draw underline

    rectPaint.setColor(underlineColor);
    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }

    // draw indicator line

    rectPaint.setColor(indicatorColor);

    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);
}

---

From source file:com.example.view.wheel.WheelView.java

/**
 * Draws rect for current value/*w ww. j  a  v  a2s .  c  o m*/
 * @param canvas the canvas for drawing
 */
private void drawCenterRect(Canvas canvas) {
    int center = getHeight() / 2;
    int offset = getItemHeight() / 2;
    //   centerDrawable.setBounds(0, center - offset, getWidth(), center + offset);
    //   centerDrawable.draw(canvas);
    canvas.drawLine(getWidth() / 2 - 100, center - offset, getWidth() / 2 + 100, center - offset, linePaint);
    canvas.drawLine(getWidth() / 2 - 100, center + offset, getWidth() / 2 + 100, center + offset, linePaint);
}

---

From source file:com.wanikani.androidnotifier.graph.TYPlot.java

/**
 * Draws the grinds on the canvas. Since they are "over" the plot, this
 * method should be called last//from   ww  w .  j  ava  2s.  c om
 * @param canvas the canvas
 */
protected void drawGrid(Canvas canvas) {
    float f, dateLabelBaseline, levelupBaseline;
    Map<Integer, Pager.Marker> markers;
    Pager.Marker marker;
    int d, lo, hi, ascent;
    DateFormat df;
    String s;
    Calendar cal;

    canvas.drawLine(meas.plotArea.left, meas.plotArea.bottom, meas.plotArea.right, meas.plotArea.bottom,
            pas.axisPaint);
    f = vp.getRelPosition(0);
    lo = vp.leftmostDay();
    hi = vp.rightmostDay();
    cal = taxis.dayToCalendar(lo);

    markers = pager.dsource.getMarkers();

    ascent = (int) pas.dateLabels.getFontMetrics().ascent;

    dateLabelBaseline = meas.plotArea.bottom - ascent + meas.tickSize / 2;
    levelupBaseline = meas.plotArea.top - meas.tickSize / 2;

    for (d = meas.yaxisGrid; vp.getY(d) >= meas.plotArea.top; d += meas.yaxisGrid)
        canvas.drawLine(meas.plotArea.left, vp.getY(d), meas.plotArea.right, vp.getY(d), pas.gridPaint);

    for (d = lo; d <= hi; d++) {
        f = vp.getRelPosition(d);

        if (d == 0 || d == taxis.today)
            canvas.drawLine(f, meas.plotArea.top, f, meas.plotArea.bottom, pas.axisPaint);
        else if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.MONDAY)
            canvas.drawLine(f, meas.plotArea.top, f, meas.plotArea.bottom, pas.gridPaint);

        if (cal.get(Calendar.DAY_OF_MONTH) == 1) {
            df = cal.get(Calendar.MONTH) == Calendar.JANUARY ? janf : datef;
            s = df.format(cal.getTime());
            canvas.drawLine(f, meas.plotArea.bottom - meas.tickSize / 2, f,
                    meas.plotArea.bottom + meas.tickSize / 2, pas.axisPaint);
            canvas.drawText(s, f, dateLabelBaseline, pas.dateLabels);
        }

        marker = markers.get(d);
        if (marker != null) {
            pas.levelup.setColor(marker.color);
            canvas.drawLine(f, meas.plotArea.top, f, meas.plotArea.bottom, pas.levelup);
            canvas.drawText(marker.name, f, levelupBaseline, pas.levelup);
        }

        cal.add(Calendar.DATE, 1);
    }
}

---

From source file:de.tlabs.ssr.g1.client.SourcesView.java

private void recalculateSizeScale() {
    float sizeInMeters;
    double upperBoundingPowOfTen;
    double scaleLengthInMeters;
    float scaleLengthInPixels;
    float scaleStartInPixels = 20.0f;

    // get size of short display edge in meters
    sizeInMeters = inverseViewportTransformation
            .mapRadius(Math.min(getWidth(), getHeight()) - scaleStartInPixels * 2.0f);

    // find upper bounding power of ten (0.01, 0.1, 1, 10, 100, etc.)
    if (sizeInMeters > 1.0) {
        upperBoundingPowOfTen = 10.0;//from w  w w.  j a va  2 s  . c  o  m
        while (true) {
            if (sizeInMeters / upperBoundingPowOfTen > 1.0f) {
                upperBoundingPowOfTen *= 10.0;
            } else {
                break;
            }
        }
    } else {
        upperBoundingPowOfTen = 1.0;
        while (true) {
            if (sizeInMeters / upperBoundingPowOfTen >= 0.1f) {
                break;
            } else {
                upperBoundingPowOfTen *= 0.1;
            }
        }
    }

    // map to subdivisions
    scaleLengthInMeters = sizeInMeters / upperBoundingPowOfTen;
    if (scaleLengthInMeters > 0.75)
        scaleLengthInMeters = 0.75;
    else if (scaleLengthInMeters > 0.5)
        scaleLengthInMeters = 0.5;
    else if (scaleLengthInMeters > 0.3)
        scaleLengthInMeters = 0.3;
    else if (scaleLengthInMeters > 0.2)
        scaleLengthInMeters = 0.2;
    else if (scaleLengthInMeters > 0.15)
        scaleLengthInMeters = 0.15;
    else
        scaleLengthInMeters = 0.1;
    scaleLengthInMeters *= upperBoundingPowOfTen;

    // get corresponding scale length in pixels
    scaleLengthInPixels = viewportTransformation.mapRadius((float) scaleLengthInMeters);

    // generate picture
    Canvas canvas = sizeScalePicture.beginRecording(0, 0);
    float y = getHeight() - 5.0f;
    float xHalf = scaleStartInPixels + scaleLengthInPixels / 2.0f;
    float scaleEndInPixels = scaleStartInPixels + scaleLengthInPixels;

    SourcesView.paint.setARGB(255, 255, 255, 255);
    SourcesView.paint.setAntiAlias(true);
    canvas.drawLine(scaleStartInPixels - 1.0f, y, scaleEndInPixels + 1.0f, y, SourcesView.paint);
    canvas.drawLine(scaleStartInPixels, y, scaleStartInPixels, y - 5.0f, SourcesView.paint);
    canvas.drawLine(xHalf, y, xHalf, y - 5.0f, SourcesView.paint);
    canvas.drawLine(scaleEndInPixels, y, scaleEndInPixels, y - 5.0f, SourcesView.paint);

    canvas.drawText("0m", scaleStartInPixels, y - 8.0f, SourcesView.paint);
    canvas.drawText(String.valueOf((float) scaleLengthInMeters / 2.0f) + "m", xHalf, y - 8.0f,
            SourcesView.paint);
    canvas.drawText(String.valueOf((float) scaleLengthInMeters) + "m", scaleEndInPixels, y - 8.0f,
            SourcesView.paint);
}

---

From source file:com.shawnway.nav.app.wtw.view.PagerSlidingTabStrip.java

private void drawNormalUnderLine(Canvas canvas, int height, View currentTab, float lineLeft, float lineRight) {
    canvas.drawRect(lineLeft, height * (1 - indicatorHeight), lineRight, height, rectPaint);

    // draw underline

    rectPaint.setColor(underlineColor);// w  w w.j  a v a 2  s .com
    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }
}

---

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