Example usage for android.graphics Canvas drawCircle

Introduction

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

Prototype

public void drawCircle(float cx, float cy, float radius, @NonNull Paint paint) 

Source Link

Document

Draw the specified circle using the specified paint.

Usage

From source file:com.android.settings.widget.DotsPageIndicator.java

private void drawUnselected(Canvas canvas) {
    combinedUnselectedPath.rewind();//from w w  w  . j  a  va2 s .  c o  m

    // draw any settled, revealing or joining dots
    for (int page = 0; page < pageCount; page++) {
        int nextXIndex = page == pageCount - 1 ? page : page + 1;
        // todo Path.op should be supported in KitKat but causes the app to hang for Nexus 5.
        // For now disabling for all pre-L devices.
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Path unselectedPath = getUnselectedPath(page, dotCenterX[page], dotCenterX[nextXIndex],
                    page == pageCount - 1 ? INVALID_FRACTION : joiningFractions[page],
                    dotRevealFractions[page]);
            combinedUnselectedPath.op(unselectedPath, Path.Op.UNION);
        } else {
            canvas.drawCircle(dotCenterX[page], dotCenterY, dotRadius, unselectedPaint);
        }
    }

    // draw any retreating joins
    if (retreatingJoinX1 != INVALID_FRACTION) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            combinedUnselectedPath.op(getRetreatingJoinPath(), Path.Op.UNION);
        }
    }
    canvas.drawPath(combinedUnselectedPath, unselectedPaint);
}

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From source file:com.gm.common.ui.widget.pageindicator.PageIndicatorView.java

private void drawWithSlideAnimation(@NonNull Canvas canvas, int position, int x, int y) {
    fillPaint.setColor(unselectedColor);
    canvas.drawCircle(x, y, radiusPx, fillPaint);

    int from = orientation == Orientation.HORIZONTAL ? frameSlideFrom : x;
    int to = orientation == Orientation.HORIZONTAL ? y : frameSlideFrom;

    if (interactiveAnimation && (position == selectingPosition || position == selectedPosition)) {
        fillPaint.setColor(selectedColor);
        canvas.drawCircle(from, to, radiusPx, fillPaint);

    } else if (!interactiveAnimation && (position == selectedPosition || position == lastSelectedPosition)) {
        fillPaint.setColor(selectedColor);
        canvas.drawCircle(from, to, radiusPx, fillPaint);
    }//  w  w  w.j  av a  2  s  . co m
}

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From source file:io.doist.datetimepicker.time.RadialTimePickerView.java

private void drawDebug(Canvas canvas) {
    // Draw outer numbers circle
    final float outerRadius = mCircleRadius[HOURS] * mNumbersRadiusMultiplier[HOURS];
    canvas.drawCircle(mXCenter, mYCenter, outerRadius, mPaintDebug);

    // Draw inner numbers circle
    final float innerRadius = mCircleRadius[HOURS] * mNumbersRadiusMultiplier[HOURS_INNER];
    canvas.drawCircle(mXCenter, mYCenter, innerRadius, mPaintDebug);

    // Draw outer background circle
    canvas.drawCircle(mXCenter, mYCenter, mCircleRadius[HOURS], mPaintDebug);

    // Draw outer rectangle for circles
    float left = mXCenter - outerRadius;
    float top = mYCenter - outerRadius;
    float right = mXCenter + outerRadius;
    float bottom = mYCenter + outerRadius;
    canvas.drawRect(left, top, right, bottom, mPaintDebug);

    // Draw outer rectangle for background
    left = mXCenter - mCircleRadius[HOURS];
    top = mYCenter - mCircleRadius[HOURS];
    right = mXCenter + mCircleRadius[HOURS];
    bottom = mYCenter + mCircleRadius[HOURS];
    canvas.drawRect(left, top, right, bottom, mPaintDebug);

    // Draw outer view rectangle
    canvas.drawRect(0, 0, getWidth(), getHeight(), mPaintDebug);

    // Draw selected time
    final String selected = String.format("%02d:%02d", getCurrentHour(), getCurrentMinute());

    ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
            ViewGroup.LayoutParams.WRAP_CONTENT);
    TextView tv = new TextView(getContext());
    tv.setLayoutParams(lp);/*from w  w  w .j av  a 2s . c o m*/
    tv.setText(selected);
    tv.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
    Paint paint = tv.getPaint();
    paint.setColor(DEBUG_TEXT_COLOR);

    final int width = tv.getMeasuredWidth();

    float height = paint.descent() - paint.ascent();
    float x = mXCenter - width / 2;
    float y = mYCenter + 1.5f * height;

    canvas.drawText(selected, x, y, paint);
}

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From source file:com.codetroopers.betterpickers.radialtimepicker.RadialSelectorView.java

@Override
public void onDraw(Canvas canvas) {
    int viewWidth = getWidth();
    if (viewWidth == 0 || !mIsInitialized) {
        return;// w ww . j  ava  2  s .  c  om
    }

    if (!mDrawValuesReady) {
        mXCenter = getWidth() / 2;
        mYCenter = getHeight() / 2;
        mCircleRadius = (int) (Math.min(mXCenter, mYCenter) * mCircleRadiusMultiplier);

        if (!mIs24HourMode) {
            // We'll need to draw the AM/PM circles, so the main circle will need to have
            // a slightly higher center. To keep the entire view centered vertically, we'll
            // have to push it up by half the radius of the AM/PM circles.
            int amPmCircleRadius = (int) (mCircleRadius * mAmPmCircleRadiusMultiplier);
            mYCenter -= amPmCircleRadius / 2;
        }

        mSelectionRadius = (int) (mCircleRadius * mSelectionRadiusMultiplier);

        mDrawValuesReady = true;
    }

    // Calculate the current radius at which to place the selection circle.
    mLineLength = (int) (mCircleRadius * mNumbersRadiusMultiplier * mAnimationRadiusMultiplier);
    int pointX = mXCenter + (int) (mLineLength * Math.sin(mSelectionRadians));
    int pointY = mYCenter - (int) (mLineLength * Math.cos(mSelectionRadians));

    // Draw the selection circle.
    mPaint.setAlpha(mSelectionAlpha);
    canvas.drawCircle(pointX, pointY, mSelectionRadius, mPaint);

    if (mForceDrawDot | mSelectionDegrees % 30 != 0) {
        // We're not on a direct tick (or we've been told to draw the dot anyway).
        mPaint.setAlpha(FULL_ALPHA);
        canvas.drawCircle(pointX, pointY, (mSelectionRadius * 2 / 7), mPaint);
    } else {
        // We're not drawing the dot, so shorten the line to only go as far as the edge of the
        // selection circle.
        int lineLength = mLineLength;
        lineLength -= mSelectionRadius;
        pointX = mXCenter + (int) (lineLength * Math.sin(mSelectionRadians));
        pointY = mYCenter - (int) (lineLength * Math.cos(mSelectionRadians));
    }

    // Draw the line from the center of the circle.
    mPaint.setAlpha(255);
    mPaint.setStrokeWidth(1);
    canvas.drawLine(mXCenter, mYCenter, pointX, pointY, mPaint);
}

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From source file:com.zwj.customview.gesturelock.PatternView.java

/**
 * @param partOfPattern Whether this circle is part of the pattern.
 *///www . j a v  a2 s  .  co  m
private void drawCircle(Canvas canvas, float centerX, float centerY, float radius, boolean partOfPattern,
        float alpha) {

    mPaint.setColor(getCurrentColor(partOfPattern));
    mPaint.setAlpha((int) (alpha * 255));
    canvas.drawCircle(centerX, centerY, radius, mPaint);

    // TODO 
    // 
    mPaintExcircle.setStyle(Paint.Style.STROKE);
    mPaintExcircle.setStrokeWidth(2);
    canvas.drawCircle(centerX, centerY, mExcircleRadius, mPaintExcircle);
}

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

/**
 * Method to draw the dots over needle scale
 *
 * @param canvas drawable element//from ww w.  j av a  2s . c  o  m
 */
private void drawDotMarker(Canvas canvas) {
    float cx = canvas.getWidth() / 2;
    float cy = canvas.getHeight() / 2;
    float scaleMarkSize = getResources().getDisplayMetrics().density * 10;
    int radius = mArcRadius + mNeedleDistance + mIncreaseCenterNeedle + 15;

    for (float progress = 0; progress <= mMax; progress += 0.2f) {
        float progressSweep = progress / mMax * mSweepAngle;
        int thumbAngle = (int) (mStartAngle + progressSweep + mRotation);

        float stopX = (float) (cx + (radius + scaleMarkSize) * Math.sin(Math.toRadians(thumbAngle)));
        float stopY = (float) (cy - (radius + scaleMarkSize) * Math.cos(Math.toRadians(thumbAngle)));

        canvas.drawCircle(stopX, stopY, mDotSize, mNeedleScalePaint);
    }
}

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From source file:com.gm.common.ui.widget.pageindicator.PageIndicatorView.java

private void drawWithSwapAnimation(@NonNull Canvas canvas, int position, int x, int y) {
    fillPaint.setColor(unselectedColor);

    if (position == selectedPosition) {
        fillPaint.setColor(selectedColor);
        canvas.drawCircle(frameSlideFrom, y, radiusPx, fillPaint);

    } else if (interactiveAnimation && position == selectingPosition) {
        canvas.drawCircle(x - (frameSlideFrom - getXCoordinate(selectedPosition)), y, radiusPx, fillPaint);

    } else if (!interactiveAnimation) {
        canvas.drawCircle(x - (frameSlideFrom - getXCoordinate(selectedPosition)), y, radiusPx, fillPaint);

    } else {// w w w .j a  va2 s .c  o m
        canvas.drawCircle(x, y, radiusPx, fillPaint);
    }
}

---

From source file:com.gm.common.ui.widget.pageindicator.PageIndicatorView.java

private void drawWithSwapAnimationVertically(@NonNull Canvas canvas, int position, int x, int y) {
    fillPaint.setColor(unselectedColor);

    if (position == selectedPosition) {
        fillPaint.setColor(selectedColor);
        canvas.drawCircle(x, frameSlideFrom, radiusPx, fillPaint);

    } else if (interactiveAnimation && position == selectingPosition) {
        canvas.drawCircle(x, y - (frameSlideFrom - getYCoordinate(selectedPosition)), radiusPx, fillPaint);

    } else if (!interactiveAnimation) {
        canvas.drawCircle(x, y - (frameSlideFrom - getYCoordinate(selectedPosition)), radiusPx, fillPaint);

    } else {//from   www  .  ja v  a2  s  . c o m
        canvas.drawCircle(x, y, radiusPx, fillPaint);
    }
}

---

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

@Override
protected void onDraw(Canvas canvas) {

    if (isInEditMode() || tabCount == 0) {
        return;/*w ww.jav a  2 s .co  m*/
    }

    final int height = getHeight();

    // 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);
    }
    switch (indicatorStyle) {
    case STYLE_CIRCLE:
        canvas.drawCircle((lineLeft + lineRight) / 2, (currentTab.getTop() + currentTab.getBottom()) / 2,
                circleSize, rectPaint);
        break;
    case STYLE_RECTANGLE:
        drawRectangle(canvas, height, currentTab, lineLeft, lineRight);
        break;
    case STYLE_NORMAL:
        drawNormalUnderLine(canvas, height, currentTab, lineLeft, lineRight);
    default:
        break;
    }
    super.onDraw(canvas);

    // // 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);
    // }
}

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From source file:com.andexert.calendarlistview.library.SimpleMonthView.java

protected void drawMonthNums(Canvas canvas) {
    int y = (mRowHeight + MINI_DAY_NUMBER_TEXT_SIZE) / 2 - DAY_SEPARATOR_WIDTH + MONTH_HEADER_SIZE;
    int paddingDay = (mWidth - 2 * mPadding) / (2 * mNumDays);
    int dayOffset = findDayOffset();
    int day = 1;/*w  w  w . j a  v  a2 s . c o m*/
    String toDayRes = getResources().getString(R.string.today);
    while (day <= mNumCells) {
        boolean isShowTrain = true;
        int x = paddingDay * (1 + dayOffset * 2) + mPadding;
        if ((mMonth == mSelectedBeginMonth && mSelectedBeginDay == day && mSelectedBeginYear == mYear)
                || (mMonth == mSelectedLastMonth && mSelectedLastDay == day && mSelectedLastYear == mYear)) {
            if (mDrawRect) {
                RectF rectF = new RectF(x - DAY_SELECTED_CIRCLE_SIZE,
                        (y - MINI_DAY_NUMBER_TEXT_SIZE / 3) - DAY_SELECTED_CIRCLE_SIZE,
                        x + DAY_SELECTED_CIRCLE_SIZE,
                        (y - MINI_DAY_NUMBER_TEXT_SIZE / 3) + DAY_SELECTED_CIRCLE_SIZE);
                canvas.drawRoundRect(rectF, 10.0f, 10.0f, mSelectedCirclePaint);
            } else {
                canvas.drawCircle(x, y - MINI_DAY_NUMBER_TEXT_SIZE / 3, DAY_SELECTED_CIRCLE_SIZE,
                        mSelectedCirclePaint);
            }
            isShowTrain = false;
        }
        if (mHasToday && (mToday == day)) {
            mMonthNumPaint.setColor(mCurrentDayTextColor);
        } else {
            mMonthNumPaint.setColor(mDayNumColor);
            mMonthNumPaint.setTypeface(Typeface.defaultFromStyle(Typeface.NORMAL));
        }

        if ((mMonth == mSelectedBeginMonth && mSelectedBeginDay == day && mSelectedBeginYear == mYear)
                || (mMonth == mSelectedLastMonth && mSelectedLastDay == day && mSelectedLastYear == mYear))
            mMonthNumPaint.setColor(mMonthTitleBGColor);

        if ((mSelectedBeginDay != -1 && mSelectedLastDay != -1 && mSelectedBeginYear == mSelectedLastYear
                && mSelectedBeginMonth == mSelectedLastMonth && mSelectedBeginDay == mSelectedLastDay
                && day == mSelectedBeginDay && mMonth == mSelectedBeginMonth && mYear == mSelectedBeginYear)) {
            mMonthNumPaint.setColor(mSelectedDaysColor);
        }
        //?
        if ((mSelectedBeginDay != -1 && mSelectedLastDay != -1 && mSelectedBeginYear == mSelectedLastYear
                && mSelectedBeginYear == mYear)
                && (((mMonth == mSelectedBeginMonth && mSelectedLastMonth == mSelectedBeginMonth)
                        && ((mSelectedBeginDay < mSelectedLastDay && day > mSelectedBeginDay
                                && day < mSelectedLastDay)
                                || (mSelectedBeginDay > mSelectedLastDay && day < mSelectedBeginDay
                                        && day > mSelectedLastDay)))
                        || ((mSelectedBeginMonth < mSelectedLastMonth && mMonth == mSelectedBeginMonth
                                && day > mSelectedBeginDay)
                                || (mSelectedBeginMonth < mSelectedLastMonth && mMonth == mSelectedLastMonth
                                        && day < mSelectedLastDay))
                        || ((mSelectedBeginMonth > mSelectedLastMonth && mMonth == mSelectedBeginMonth
                                && day < mSelectedBeginDay)
                                || (mSelectedBeginMonth > mSelectedLastMonth && mMonth == mSelectedLastMonth
                                        && day > mSelectedLastDay)))) {
            mMonthNumPaint.setColor(mSelectedDaysColor);
        }

        if ((mSelectedBeginDay != -1 && mSelectedLastDay != -1 && mSelectedBeginYear != mSelectedLastYear
                && ((mSelectedBeginYear == mYear && mMonth == mSelectedBeginMonth)
                        || (mSelectedLastYear == mYear && mMonth == mSelectedLastMonth))
                && (((mSelectedBeginMonth < mSelectedLastMonth && mMonth == mSelectedBeginMonth
                        && day < mSelectedBeginDay)
                        || (mSelectedBeginMonth < mSelectedLastMonth && mMonth == mSelectedLastMonth
                                && day > mSelectedLastDay))
                        || ((mSelectedBeginMonth > mSelectedLastMonth && mMonth == mSelectedBeginMonth
                                && day > mSelectedBeginDay)
                                || (mSelectedBeginMonth > mSelectedLastMonth && mMonth == mSelectedLastMonth
                                        && day < mSelectedLastDay))))) {
            mMonthNumPaint.setColor(mSelectedDaysColor);
        }

        if ((mSelectedBeginDay != -1 && mSelectedLastDay != -1 && mSelectedBeginYear == mSelectedLastYear
                && mYear == mSelectedBeginYear)
                && ((mMonth > mSelectedBeginMonth && mMonth < mSelectedLastMonth
                        && mSelectedBeginMonth < mSelectedLastMonth)
                        || (mMonth < mSelectedBeginMonth && mMonth > mSelectedLastMonth
                                && mSelectedBeginMonth > mSelectedLastMonth))) {
            mMonthNumPaint.setColor(mSelectedDaysColor);
        }

        if ((mSelectedBeginDay != -1 && mSelectedLastDay != -1 && mSelectedBeginYear != mSelectedLastYear)
                && ((mSelectedBeginYear < mSelectedLastYear
                        && ((mMonth > mSelectedBeginMonth && mYear == mSelectedBeginYear)
                                || (mMonth < mSelectedLastMonth && mYear == mSelectedLastYear)))
                        || (mSelectedBeginYear > mSelectedLastYear
                                && ((mMonth < mSelectedBeginMonth && mYear == mSelectedBeginYear)
                                        || (mMonth > mSelectedLastMonth && mYear == mSelectedLastYear))))) {
            mMonthNumPaint.setColor(mSelectedDaysColor);
        }

        if ((!isPrevDayEnabled && prevDay(day, today)) || nextDay(day)) {
            mMonthNumPaint.setColor(mPreviousDayColor);
        }
        if (mHasToday && (mToday == day)) {
            canvas.drawText(toDayRes, x, y, mMonthNumPaint);
        } else {
            canvas.drawText(String.format("%d", day), x, y, mMonthNumPaint);
        }
        dayOffset++;
        if (dayOffset == mNumDays) {
            dayOffset = 0;
            y += mRowHeight;
        }
        day++;
    }
}

---

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