Java Code Examples for com.github.mikephil.charting.utils.Utils#postInvalidateOnAnimation()

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Example 1
Source File: BarLineChartTouchListener.java    From NetKnight with Apache License 2.0 5 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationVelocity.x == 0.f && mDecelerationVelocity.y == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationVelocity.x *= mChart.getDragDecelerationFrictionCoef();
        mDecelerationVelocity.y *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        float distanceX = mDecelerationVelocity.x * timeInterval;
        float distanceY = mDecelerationVelocity.y * timeInterval;

        mDecelerationCurrentPoint.x += distanceX;
        mDecelerationCurrentPoint.y += distanceY;

        MotionEvent event = MotionEvent.obtain(currentTime, currentTime, MotionEvent.ACTION_MOVE, mDecelerationCurrentPoint.x, mDecelerationCurrentPoint.y, 0);
        performDrag(event);
        event.recycle();
        mMatrix = mChart.getViewPortHandler().refresh(mMatrix, mChart, false);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationVelocity.x) >= 0.01 || Math.abs(mDecelerationVelocity.y) >= 0.01)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else {
            // Range might have changed, which means that Y-axis labels
            // could have changed in size, affecting Y-axis size.
            // So we need to recalculate offsets.
            mChart.calculateOffsets();
            mChart.postInvalidate();

            stopDeceleration();
        }
    }
Example 2
Source File: BarLineChartTouchListener.java    From android-kline with Apache License 2.0 5 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationVelocity.x == 0.f && mDecelerationVelocity.y == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationVelocity.x *= mChart.getDragDecelerationFrictionCoef();
        mDecelerationVelocity.y *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        float distanceX = mDecelerationVelocity.x * timeInterval;
        float distanceY = mDecelerationVelocity.y * timeInterval;

        mDecelerationCurrentPoint.x += distanceX;
        mDecelerationCurrentPoint.y += distanceY;

        MotionEvent event = MotionEvent.obtain(currentTime, currentTime, MotionEvent.ACTION_MOVE, mDecelerationCurrentPoint.x,
                mDecelerationCurrentPoint.y, 0);
        performDrag(event);
        event.recycle();
        mMatrix = mChart.getViewPortHandler().refresh(mMatrix, mChart, false);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationVelocity.x) >= 0.01 || Math.abs(mDecelerationVelocity.y) >= 0.01)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else {
            // Range might have changed, which means that Y-axis labels
            // could have changed in size, affecting Y-axis size.
            // So we need to recalculate offsets.
            mChart.calculateOffsets();
            mChart.postInvalidate();

            stopDeceleration();
        }
    }
Example 3
Source File: BarLineChartTouchListener.java    From Stayfit with Apache License 2.0 5 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationVelocity.x == 0.f && mDecelerationVelocity.y == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationVelocity.x *= mChart.getDragDecelerationFrictionCoef();
        mDecelerationVelocity.y *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float)(currentTime - mDecelerationLastTime) / 1000.f;

        float distanceX = mDecelerationVelocity.x * timeInterval;
        float distanceY = mDecelerationVelocity.y * timeInterval;

        mDecelerationCurrentPoint.x += distanceX;
        mDecelerationCurrentPoint.y += distanceY;

        MotionEvent event = MotionEvent.obtain(currentTime, currentTime, MotionEvent.ACTION_MOVE, mDecelerationCurrentPoint.x, mDecelerationCurrentPoint.y, 0);
        performDrag(event);
        event.recycle();
        mMatrix = mChart.getViewPortHandler().refresh(mMatrix, mChart, false);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationVelocity.x) >= 0.01 || Math.abs(mDecelerationVelocity.y) >= 0.01)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else {
            // Range might have changed, which means that Y-axis labels
            // could have changed in size, affecting Y-axis size.
            // So we need to recalculate offsets.
            mChart.calculateOffsets();
            mChart.postInvalidate();

            stopDeceleration();
        }
    }
Example 4
Source File: BarLineChartTouchListener.java    From iMoney with Apache License 2.0 5 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationVelocity.x == 0.f && mDecelerationVelocity.y == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationVelocity.x *= mChart.getDragDecelerationFrictionCoef();
        mDecelerationVelocity.y *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float)(currentTime - mDecelerationLastTime) / 1000.f;

        float distanceX = mDecelerationVelocity.x * timeInterval;
        float distanceY = mDecelerationVelocity.y * timeInterval;

        mDecelerationCurrentPoint.x += distanceX;
        mDecelerationCurrentPoint.y += distanceY;

        MotionEvent event = MotionEvent.obtain(currentTime, currentTime, MotionEvent.ACTION_MOVE, mDecelerationCurrentPoint.x, mDecelerationCurrentPoint.y, 0);
        performDrag(event);
        event.recycle();
        mMatrix = mChart.getViewPortHandler().refresh(mMatrix, mChart, false);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationVelocity.x) >= 0.01 || Math.abs(mDecelerationVelocity.y) >= 0.01)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else {
            // Range might have changed, which means that Y-axis labels
            // could have changed in size, affecting Y-axis size.
            // So we need to recalculate offsets.
            mChart.calculateOffsets();
            mChart.postInvalidate();

            stopDeceleration();
        }
    }
Example 5
Source File: PieRadarChartTouchListener.java    From NetKnight with Apache License 2.0 4 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationAngularVelocity == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationAngularVelocity *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        mChart.setRotationAngle(mChart.getRotationAngle() + mDecelerationAngularVelocity * timeInterval);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationAngularVelocity) >= 0.001)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else
            stopDeceleration();
    }
Example 6
Source File: BarLineChartTouchListener.java    From StockChart-MPAndroidChart with MIT License 4 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationVelocity.x == 0.f && mDecelerationVelocity.y == 0.f) {
            return; // There's no deceleration in progress
        }

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationVelocity.x *= mChart.getDragDecelerationFrictionCoef();
        mDecelerationVelocity.y *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        float distanceX = mDecelerationVelocity.x * timeInterval;
        float distanceY = mDecelerationVelocity.y * timeInterval;

        mDecelerationCurrentPoint.x += distanceX;
        mDecelerationCurrentPoint.y += distanceY;

        MotionEvent event = MotionEvent.obtain(currentTime, currentTime, MotionEvent.ACTION_MOVE, mDecelerationCurrentPoint.x,
                mDecelerationCurrentPoint.y, 0);

        float dragDistanceX = mChart.isDragXEnabled() ? mDecelerationCurrentPoint.x - mTouchStartPoint.x : 0.f;
        float dragDistanceY = mChart.isDragYEnabled() ? mDecelerationCurrentPoint.y - mTouchStartPoint.y : 0.f;

        performDrag(event, dragDistanceX, dragDistanceY);

        event.recycle();
        mMatrix = mChart.getViewPortHandler().refresh(mMatrix, mChart, false);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationVelocity.x) >= 0.01 || Math.abs(mDecelerationVelocity.y) >= 0.01) {
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        } else {
            // Range might have changed, which means that Y-axis labels
            // could have changed in size, affecting Y-axis size.
            // So we need to recalculate offsets.
            mChart.calculateOffsets();
            mChart.postInvalidate();

            stopDeceleration();
        }
    }
Example 7
Source File: PieRadarChartTouchListener.java    From NetKnight with Apache License 2.0 4 votes vote down vote up 
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {

    if (mGestureDetector.onTouchEvent(event))
        return true;

    // if rotation by touch is enabled
    if (mChart.isRotationEnabled()) {

        float x = event.getX();
        float y = event.getY();

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:

                startAction(event);

                stopDeceleration();

                resetVelocity();

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                setGestureStartAngle(x, y);
                mTouchStartPoint.x = x;
                mTouchStartPoint.y = y;

                break;
            case MotionEvent.ACTION_MOVE:

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                if (mTouchMode == NONE
                        && distance(x, mTouchStartPoint.x, y, mTouchStartPoint.y)
                        > Utils.convertDpToPixel(8f)) {
                    mLastGesture = ChartGesture.ROTATE;
                    mTouchMode = ROTATE;
                    mChart.disableScroll();
                } else if (mTouchMode == ROTATE) {
                    updateGestureRotation(x, y);
                    mChart.invalidate();
                }

                endAction(event);

                break;
            case MotionEvent.ACTION_UP:

                if (mChart.isDragDecelerationEnabled()) {

                    stopDeceleration();

                    sampleVelocity(x, y);

                    mDecelerationAngularVelocity = calculateVelocity();

                    if (mDecelerationAngularVelocity != 0.f) {
                        mDecelerationLastTime = AnimationUtils.currentAnimationTimeMillis();

                        Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
                    }
                }

                mChart.enableScroll();
                mTouchMode = NONE;

                endAction(event);

                break;
        }
    }

    return true;
}
Example 8
Source File: PieRadarChartTouchListener.java    From Stayfit with Apache License 2.0 4 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationAngularVelocity == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationAngularVelocity *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        mChart.setRotationAngle(mChart.getRotationAngle() + mDecelerationAngularVelocity * timeInterval);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationAngularVelocity) >= 0.001)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else
            stopDeceleration();
    }
Example 9
Source File: PieRadarChartTouchListener.java    From Stayfit with Apache License 2.0 4 votes vote down vote up 
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {

    if (mGestureDetector.onTouchEvent(event))
        return true;

    // if rotation by touch is enabled
    if (mChart.isRotationEnabled()) {

        float x = event.getX();
        float y = event.getY();

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:

                startAction(event);

                stopDeceleration();

                resetVelocity();

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                setGestureStartAngle(x, y);
                mTouchStartPoint.x = x;
                mTouchStartPoint.y = y;

                break;
            case MotionEvent.ACTION_MOVE:

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                if (mTouchMode == NONE
                        && distance(x, mTouchStartPoint.x, y, mTouchStartPoint.y)
                        > Utils.convertDpToPixel(8f)) {
                    mLastGesture = ChartGesture.ROTATE;
                    mTouchMode = ROTATE;
                    mChart.disableScroll();
                } else if (mTouchMode == ROTATE) {
                    updateGestureRotation(x, y);
                    mChart.invalidate();
                }

                endAction(event);

                break;
            case MotionEvent.ACTION_UP:

                if (mChart.isDragDecelerationEnabled()) {

                    stopDeceleration();

                    sampleVelocity(x, y);

                    mDecelerationAngularVelocity = calculateVelocity();

                    if (mDecelerationAngularVelocity != 0.f) {
                        mDecelerationLastTime = AnimationUtils.currentAnimationTimeMillis();

                        Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
                    }
                }

                mChart.enableScroll();
                mTouchMode = NONE;

                endAction(event);

                break;
        }
    }

    return true;
}
Example 10
Source File: PieRadarChartTouchListener.java    From iMoney with Apache License 2.0 4 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationAngularVelocity == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationAngularVelocity *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float)(currentTime - mDecelerationLastTime) / 1000.f;

        mChart.setRotationAngle(mChart.getRotationAngle() + mDecelerationAngularVelocity * timeInterval);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationAngularVelocity) >= 0.001)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else
            stopDeceleration();
    }
Example 11
Source File: PieRadarChartTouchListener.java    From iMoney with Apache License 2.0 4 votes vote down vote up 
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {

    if (mGestureDetector.onTouchEvent(event))
        return true;

    // if rotation by touch is enabled
    if (mChart.isRotationEnabled()) {

        float x = event.getX();
        float y = event.getY();

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:

                stopDeceleration();

                resetVelocity();

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                setGestureStartAngle(x, y);
                mTouchStartPoint.x = x;
                mTouchStartPoint.y = y;

                break;
            case MotionEvent.ACTION_MOVE:

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                if (mTouchMode == NONE
                        && distance(x, mTouchStartPoint.x, y, mTouchStartPoint.y)
                        > Utils.convertDpToPixel(8f)) {
                    mTouchMode = ROTATE;
                    mChart.disableScroll();
                } else if (mTouchMode == ROTATE) {
                    updateGestureRotation(x, y);
                    mChart.invalidate();
                }

                break;
            case MotionEvent.ACTION_UP:

                if (mChart.isDragDecelerationEnabled()) {

                    stopDeceleration();

                    sampleVelocity(x, y);

                    mDecelerationAngularVelocity = calculateVelocity();

                    if (mDecelerationAngularVelocity != 0.f) {
                        mDecelerationLastTime = AnimationUtils.currentAnimationTimeMillis();

                        Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
                    }
                }

                mChart.enableScroll();
                mTouchMode = NONE;

                break;
        }
    }

    return true;
}
Example 12
Source File: PieRadarChartTouchListener.java    From android-kline with Apache License 2.0 4 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationAngularVelocity == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationAngularVelocity *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        mChart.setRotationAngle(mChart.getRotationAngle() + mDecelerationAngularVelocity * timeInterval);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationAngularVelocity) >= 0.001)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else
            stopDeceleration();
    }
Example 13
Source File: PieRadarChartTouchListener.java    From android-kline with Apache License 2.0 4 votes vote down vote up 
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {

    if (mGestureDetector.onTouchEvent(event))
        return true;

    // if rotation by touch is enabled
    if (mChart.isRotationEnabled()) {

        float x = event.getX();
        float y = event.getY();

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:

                startAction(event);

                stopDeceleration();

                resetVelocity();

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                setGestureStartAngle(x, y);
                mTouchStartPoint.x = x;
                mTouchStartPoint.y = y;

                break;
            case MotionEvent.ACTION_MOVE:

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                if (mTouchMode == NONE
                        && distance(x, mTouchStartPoint.x, y, mTouchStartPoint.y)
                        > Utils.convertDpToPixel(8f)) {
                    mLastGesture = ChartGesture.ROTATE;
                    mTouchMode = ROTATE;
                    mChart.disableScroll();
                } else if (mTouchMode == ROTATE) {
                    updateGestureRotation(x, y);
                    mChart.invalidate();
                }

                endAction(event);

                break;
            case MotionEvent.ACTION_UP:

                if (mChart.isDragDecelerationEnabled()) {

                    stopDeceleration();

                    sampleVelocity(x, y);

                    mDecelerationAngularVelocity = calculateVelocity();

                    if (mDecelerationAngularVelocity != 0.f) {
                        mDecelerationLastTime = AnimationUtils.currentAnimationTimeMillis();

                        Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
                    }
                }

                mChart.enableScroll();
                mTouchMode = NONE;

                endAction(event);

                break;
        }
    }

    return true;
}
Example 14
Source File: PieRadarChartTouchListener.java    From Ticket-Analysis with MIT License 4 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationAngularVelocity == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationAngularVelocity *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        mChart.setRotationAngle(mChart.getRotationAngle() + mDecelerationAngularVelocity * timeInterval);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationAngularVelocity) >= 0.001)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else
            stopDeceleration();
    }
Example 15
Source File: PieRadarChartTouchListener.java    From Ticket-Analysis with MIT License 4 votes vote down vote up 
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {

    if (mGestureDetector.onTouchEvent(event))
        return true;

    // if rotation by touch is enabled
    if (mChart.isRotationEnabled()) {

        float x = event.getX();
        float y = event.getY();

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:

                startAction(event);

                stopDeceleration();

                resetVelocity();

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                setGestureStartAngle(x, y);
                mTouchStartPoint.x = x;
                mTouchStartPoint.y = y;

                break;
            case MotionEvent.ACTION_MOVE:

                if (mChart.isDragDecelerationEnabled())
                    sampleVelocity(x, y);

                if (mTouchMode == NONE
                        && distance(x, mTouchStartPoint.x, y, mTouchStartPoint.y)
                        > Utils.convertDpToPixel(8f)) {
                    mLastGesture = ChartGesture.ROTATE;
                    mTouchMode = ROTATE;
                    mChart.disableScroll();
                } else if (mTouchMode == ROTATE) {
                    updateGestureRotation(x, y);
                    mChart.invalidate();
                }

                endAction(event);

                break;
            case MotionEvent.ACTION_UP:

                if (mChart.isDragDecelerationEnabled()) {

                    stopDeceleration();

                    sampleVelocity(x, y);

                    mDecelerationAngularVelocity = calculateVelocity();

                    if (mDecelerationAngularVelocity != 0.f) {
                        mDecelerationLastTime = AnimationUtils.currentAnimationTimeMillis();

                        Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
                    }
                }

                mChart.enableScroll();
                mTouchMode = NONE;

                endAction(event);

                break;
        }
    }

    return true;
}
Example 16
Source File: BarLineChartTouchListener.java    From Ticket-Analysis with MIT License 4 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationVelocity.x == 0.f && mDecelerationVelocity.y == 0.f)
            return; // There's no deceleration in progress

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationVelocity.x *= mChart.getDragDecelerationFrictionCoef();
        mDecelerationVelocity.y *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        float distanceX = mDecelerationVelocity.x * timeInterval;
        float distanceY = mDecelerationVelocity.y * timeInterval;

        mDecelerationCurrentPoint.x += distanceX;
        mDecelerationCurrentPoint.y += distanceY;

        MotionEvent event = MotionEvent.obtain(currentTime, currentTime, MotionEvent.ACTION_MOVE, mDecelerationCurrentPoint.x,
                mDecelerationCurrentPoint.y, 0);

        float dragDistanceX = mChart.isDragXEnabled() ? mDecelerationCurrentPoint.x - mTouchStartPoint.x : 0.f;
        float dragDistanceY = mChart.isDragYEnabled() ? mDecelerationCurrentPoint.y - mTouchStartPoint.y : 0.f;

        performDrag(event, dragDistanceX, dragDistanceY);

        event.recycle();
        mMatrix = mChart.getViewPortHandler().refresh(mMatrix, mChart, false);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationVelocity.x) >= 0.01 || Math.abs(mDecelerationVelocity.y) >= 0.01)
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        else {
            // Range might have changed, which means that Y-axis labels
            // could have changed in size, affecting Y-axis size.
            // So we need to recalculate offsets.
            mChart.calculateOffsets();
            mChart.postInvalidate();

            stopDeceleration();
        }
    }
Example 17
Source File: PieRadarChartTouchListener.java    From StockChart-MPAndroidChart with MIT License 4 votes vote down vote up 
public void computeScroll() {

        if (mDecelerationAngularVelocity == 0.f) {
            return; // There's no deceleration in progress
        }

        final long currentTime = AnimationUtils.currentAnimationTimeMillis();

        mDecelerationAngularVelocity *= mChart.getDragDecelerationFrictionCoef();

        final float timeInterval = (float) (currentTime - mDecelerationLastTime) / 1000.f;

        mChart.setRotationAngle(mChart.getRotationAngle() + mDecelerationAngularVelocity * timeInterval);

        mDecelerationLastTime = currentTime;

        if (Math.abs(mDecelerationAngularVelocity) >= 0.001) {
            Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
        } else {
            stopDeceleration();
        }
    }
Example 18
Source File: PieRadarChartTouchListener.java    From StockChart-MPAndroidChart with MIT License 4 votes vote down vote up 
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {

    if (mGestureDetector.onTouchEvent(event)) {
        return true;
    }

    // if rotation by touch is enabled
    if (mChart.isRotationEnabled()) {

        float x = event.getX();
        float y = event.getY();

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:

                startAction(event);

                stopDeceleration();

                resetVelocity();

                if (mChart.isDragDecelerationEnabled()) {
                    sampleVelocity(x, y);
                }

                setGestureStartAngle(x, y);
                mTouchStartPoint.x = x;
                mTouchStartPoint.y = y;

                break;
            case MotionEvent.ACTION_MOVE:

                if (mChart.isDragDecelerationEnabled()) {
                    sampleVelocity(x, y);
                }

                if (mTouchMode == NONE
                        && distance(x, mTouchStartPoint.x, y, mTouchStartPoint.y)
                        > Utils.convertDpToPixel(8f)) {
                    mLastGesture = ChartGesture.ROTATE;
                    mTouchMode = ROTATE;
                    mChart.disableScroll();
                } else if (mTouchMode == ROTATE) {
                    updateGestureRotation(x, y);
                    mChart.invalidate();
                }

                endAction(event);

                break;
            case MotionEvent.ACTION_UP:

                if (mChart.isDragDecelerationEnabled()) {

                    stopDeceleration();

                    sampleVelocity(x, y);

                    mDecelerationAngularVelocity = calculateVelocity();

                    if (mDecelerationAngularVelocity != 0.f) {
                        mDecelerationLastTime = AnimationUtils.currentAnimationTimeMillis();

                        Utils.postInvalidateOnAnimation(mChart); // This causes computeScroll to fire, recommended for this by Google
                    }
                }

                mChart.enableScroll();
                mTouchMode = NONE;

                endAction(event);

                break;
        }
    }

    return true;
}