Example usage for android.view MotionEvent ACTION_DOWN

Introduction

In this page you can find the example usage for android.view MotionEvent ACTION_DOWN.

Prototype

int ACTION_DOWN

To view the source code for android.view MotionEvent ACTION_DOWN.

Click Source Link

Document

Constant for #getActionMasked : A pressed gesture has started, the motion contains the initial starting location.

Usage

From source file:com.albedinsky.android.support.ui.widget.ViewDragHelper.java

/**
 * Check if this event as provided to the parent view's onInterceptTouchEvent should
 * cause the parent to intercept the touch event stream.
 *
 * @param ev MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from onInterceptTouchEvent
 *//*from  w  w  w .ja va 2  s .c  o  m*/
public boolean shouldInterceptTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't get
        // the whole previous stream.
        cancel();
    }

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        if (toCapture == mCapturedView && mDragState == STATE_SETTLING) {
            tryCaptureViewForDrag(toCapture, pointerId);
        }

        final int edgesTouched = mInitialEdgesTouched[pointerId];
        if ((edgesTouched & mTrackingEdges) != 0) {
            mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
        }
        break;
    }

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);

        saveInitialMotion(x, y, pointerId);

        // A ViewDragHelper can only manipulate one view at a time.
        if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgesTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
        } else if (mDragState == STATE_SETTLING) {
            // Catch a settling view if possible.
            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture == mCapturedView) {
                tryCaptureViewForDrag(toCapture, pointerId);
            }
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        // First to cross a touch slop over a draggable view wins. Also report edge drags.
        final int pointerCount = MotionEventCompat.getPointerCount(ev);
        for (int i = 0; i < pointerCount; i++) {
            final int pointerId = MotionEventCompat.getPointerId(ev, i);
            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[pointerId];
            final float dy = y - mInitialMotionY[pointerId];

            reportNewEdgeDrags(dx, dy, pointerId);
            if (mDragState == STATE_DRAGGING) {
                // Callback might have started an edge drag
                break;
            }

            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture != null && checkTouchSlop(toCapture, dx, dy)
                    && tryCaptureViewForDrag(toCapture, pointerId)) {
                break;
            }
        }
        saveLastMotion(ev);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        cancel();
        break;
    }
    }

    return mDragState == STATE_DRAGGING;
}

---

From source file:com.appeaser.sublimepickerlibrary.timepicker.RadialTimePickerView.java

@Override
public boolean onTouchEvent(MotionEvent event) {
    if (!mInputEnabled) {
        return true;
    }/*from  w w w. j a  v a 2s  .c o m*/

    final int action = event.getActionMasked();
    if (action == MotionEvent.ACTION_MOVE || action == MotionEvent.ACTION_UP
            || action == MotionEvent.ACTION_DOWN) {
        boolean forceSelection = false;
        boolean autoAdvance = false;

        if (action == MotionEvent.ACTION_DOWN) {
            // This is a new event stream, reset whether the value changed.
            mChangedDuringTouch = false;
        } else if (action == MotionEvent.ACTION_UP) {
            autoAdvance = true;

            // If we saw a down/up pair without the value changing, assume
            // this is a single-tap selection and force a change.
            if (!mChangedDuringTouch) {
                forceSelection = true;
            }
        }

        mChangedDuringTouch |= handleTouchInput(event.getX(), event.getY(), forceSelection, autoAdvance);
    }

    return true;
}

---

From source file:app.umitems.greenclock.widget.sgv.StaggeredGridView.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    mVelocityTracker.addMovement(ev);// w w  w .j a v a  2 s .co  m
    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;
    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        mOffsetToAbsoluteX = (int) (ev.getRawX() - ev.getX());
        mOffsetToAbsoluteY = (int) (ev.getRawY() - ev.getY());

        // Per bug 7377413, event.getX() and getY() returns rawX and rawY when accessed in
        // dispatchDragEvent, so since an action down is required before a drag can be
        // initiated, initialize mTouchDownForDragStartX/Y here for the most accurate value.
        mTouchDownForDragStartX = (int) ev.getX();
        mTouchDownForDragStartY = (int) ev.getY();

        mVelocityTracker.clear();
        mScroller.abortAnimation();
        mLastTouchY = ev.getY();
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        mTouchRemainderY = 0;
        if (mTouchMode == TOUCH_MODE_FLINGING) {
            // Catch!
            mTouchMode = TOUCH_MODE_DRAGGING;
            return true;
        }
        break;
    }
    case MotionEvent.ACTION_MOVE: {
        final int index = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        if (index < 0) {
            Log.e(TAG, "onInterceptTouchEvent could not find pointer with id " + mActivePointerId
                    + " - did StaggeredGridView receive an inconsistent " + "event stream?");
            return false;
        }
        final float y = MotionEventCompat.getY(ev, index);
        final float dy = y - mLastTouchY + mTouchRemainderY;
        final int deltaY = (int) dy;
        mTouchRemainderY = dy - deltaY;

        if (Math.abs(dy) > mTouchSlop) {
            mTouchMode = TOUCH_MODE_DRAGGING;
            return true;
        }
    }
    }

    return false;
}

---

From source file:cc.flydev.launcher.Workspace.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    switch (ev.getAction() & MotionEvent.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN:
        mXDown = ev.getX();//from  ww  w .  j  a  va  2s.c  o m
        mYDown = ev.getY();
        mTouchDownTime = System.currentTimeMillis();
        break;
    case MotionEvent.ACTION_POINTER_UP:
    case MotionEvent.ACTION_UP:
        if (mTouchState == TOUCH_STATE_REST) {
            final CellLayout currentPage = (CellLayout) getChildAt(mCurrentPage);
            if (!currentPage.lastDownOnOccupiedCell()) {
                onWallpaperTap(ev);
            }
        }
    }
    return super.onInterceptTouchEvent(ev);
}

---

From source file:androidVNC.VncCanvasActivity.java

@Override
public boolean onTrackballEvent(MotionEvent event) {
    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
        trackballButtonDown = true;/*from   w  w w .  j  a v  a  2  s. c  o m*/
        break;
    case MotionEvent.ACTION_UP:
        trackballButtonDown = false;
        break;
    }
    return inputHandler.onTrackballEvent(event);
}

---

From source file:com.android.systemui.statusbar.phone.NotificationPanelView.java

private boolean isOpenQsEvent(MotionEvent event) {
    final int pointerCount = event.getPointerCount();
    final int action = event.getActionMasked();

    final boolean twoFingerDrag = action == MotionEvent.ACTION_POINTER_DOWN && pointerCount == 2;

    final boolean stylusButtonClickDrag = action == MotionEvent.ACTION_DOWN
            && (event.isButtonPressed(MotionEvent.BUTTON_STYLUS_PRIMARY)
                    || event.isButtonPressed(MotionEvent.BUTTON_STYLUS_SECONDARY));

    final boolean mouseButtonClickDrag = action == MotionEvent.ACTION_DOWN
            && (event.isButtonPressed(MotionEvent.BUTTON_SECONDARY)
                    || event.isButtonPressed(MotionEvent.BUTTON_TERTIARY));
    boolean isOverride = true;

    return twoFingerDrag || isOverride || stylusButtonClickDrag || mouseButtonClickDrag;
}

---

From source file:com.example.SmartBoard.DrawingView.java

/***********************************************************************************/
//handles color dropper mode touch events
public void onTouchColorDropperMode(MotionEvent event) {

    int X = (int) event.getX();
    int Y = (int) event.getY();
    dropperX = X;// w  w w.  j a va  2  s .  co  m
    dropperY = Y;

    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        JSONObject touchedObject = getTouchedObject(X, Y);
        if (touchedObject != null) {

            try {
                touchedObject.put("color", dropperColor);
                //for text
                if (touchedObject.optString("type").compareTo("Text") == 0) {
                    Bitmap bm = textToBitmap(touchedObject.optString("text"), dropperColor,
                            touchedObject.optInt("x"), touchedObject.optInt("y"), touchedObject.optInt("size"));
                    touchedObject.put("textBitmap", mqtt.bitmapToString(bm));
                }
                mqtt.publishObject(touchedObject);
            } catch (JSONException e) {

            }
            invalidate();
        }
    }

}

---

From source file:co.codecrunch.musicplayerlite.slidinguppanelhelper.ViewDragHelper.java

/**
 * Check if this event as provided to the parent view's
 * onInterceptTouchEvent should cause the parent to intercept the touch
 * event stream./*www .  ja  v  a  2 s  .  com*/
 *
 * @param ev
 *            MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from
 *         onInterceptTouchEvent
 */
public boolean shouldInterceptTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't get
        // the whole previous stream.
        cancel();
    }

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        if (toCapture == mCapturedView && mDragState == STATE_SETTLING) {
            tryCaptureViewForDrag(toCapture, pointerId);
        }

        final int edgesTouched = mInitialEdgesTouched[pointerId];
        if ((edgesTouched & mTrackingEdges) != 0) {
            mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
        }
        break;
    }

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);

        saveInitialMotion(x, y, pointerId);

        // A ViewDragHelper can only manipulate one view at a time.
        if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgesTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
        } else if (mDragState == STATE_SETTLING) {
            // Catch a settling view if possible.
            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture == mCapturedView) {
                tryCaptureViewForDrag(toCapture, pointerId);
            }
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        // First to cross a touch slop over a draggable view wins. Also
        // report edge drags.
        final int pointerCount = MotionEventCompat.getPointerCount(ev);
        for (int i = 0; i < pointerCount && mInitialMotionX != null && mInitialMotionY != null; i++) {
            final int pointerId = MotionEventCompat.getPointerId(ev, i);
            if (pointerId >= mInitialMotionX.length || pointerId >= mInitialMotionY.length) {
                continue;
            }
            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[pointerId];
            final float dy = y - mInitialMotionY[pointerId];

            reportNewEdgeDrags(dx, dy, pointerId);
            if (mDragState == STATE_DRAGGING) {
                // Callback might have started an edge drag
                break;
            }

            final View toCapture = findTopChildUnder((int) mInitialMotionX[pointerId],
                    (int) mInitialMotionY[pointerId]);
            if (toCapture != null && checkTouchSlop(toCapture, dx, dy)
                    && tryCaptureViewForDrag(toCapture, pointerId)) {
                break;
            }
        }
        saveLastMotion(ev);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        cancel();
        break;
    }
    }

    return mDragState == STATE_DRAGGING;
}

---

From source file:com.appsummary.luoxf.mylibrary.swipbackhelper.ViewDragHelper.java

/**
 * Check if this event as provided to the parent view's
 * onInterceptTouchEvent should cause the parent to intercept the touch
 * event stream.//from   w w w . ja  v  a2s  . c o  m
 *
 * @param ev MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from
 * onInterceptTouchEvent
 */
public boolean shouldInterceptTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't get
        // the whole previous stream.
        cancel();
    }

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        tryCaptureViewForDrag(toCapture, pointerId);

        if (mDragState == STATE_SETTLING) {
            setDragState(STATE_DRAGGING);
        } else if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgeTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
            setDragState(STATE_JUDGING);
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);
        saveInitialMotion(x, y, pointerId);
        break;
    }
    case MotionEvent.ACTION_MOVE: {
        if (mDragState == STATE_JUDGING) {
            if (mVelocityTracker == null) {
                mVelocityTracker = VelocityTracker.obtain();
            }
            if (mDragState == STATE_DRAGGING)
                mVelocityTracker.addMovement(ev);
            final int i = MotionEventCompat.findPointerIndex(ev, mActivePointerId);

            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[mActivePointerId];
            final float dy = y - mInitialMotionY[mActivePointerId];

            reportNewEdgeDrags(dx, dy, mActivePointerId);

            final View toCapture = findTopChildUnder((int) x, (int) y);
            int slop = checkTouchSlop(toCapture, dx, dy);

            if (slop == -1)
                cancel();
            else if (slop > 0 && tryCaptureViewForDrag(toCapture, mActivePointerId)) {
                break;
            }
            saveLastMotion(ev);
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP: {
        releaseViewForPointerUp();
        cancel();
        break;
    }

    case MotionEvent.ACTION_CANCEL: {
        dispatchViewReleased(0, 0);
        cancel();
        break;
    }

    }
    return mDragState == STATE_DRAGGING;
}

---

From source file:com.android.kit.swipeback.ViewDragHelper.java

/**
 * Check if this event as provided to the parent view's
 * onInterceptTouchEvent should cause the parent to intercept the touch
 * event stream./*from   w  ww  .  j  av a 2s  .c o m*/
 *
 * @param ev MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from
 * onInterceptTouchEvent
 */
public boolean shouldInterceptTouchEvent(MotionEvent ev) {

    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't get
        // the whole previous stream.
        cancel();
    }

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        tryCaptureViewForDrag(toCapture, pointerId);

        final int edgesTouched = mInitialEdgeTouched[pointerId];
        if ((edgesTouched & mTrackingEdges) != 0) {
            mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);

        saveInitialMotion(x, y, pointerId);
        break;
    }
    case MotionEvent.ACTION_MOVE: {
        if (mDragState == STATE_JUDGING) {

            final int i = MotionEventCompat.findPointerIndex(ev, mActivePointerId);

            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[mActivePointerId];
            final float dy = y - mInitialMotionY[mActivePointerId];

            reportNewEdgeDrags(dx, dy, mActivePointerId);

            final View toCapture = findTopChildUnder((int) x, (int) y);
            int slop = checkTouchSlop(toCapture, dx, dy);

            if (slop == -1)
                cancel();
            else if (slop > 0 && tryCaptureViewForDrag(toCapture, mActivePointerId)) {
                break;
            }
            saveLastMotion(ev);
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        cancel();
        break;
    }

    }
    return mDragState == STATE_DRAGGING;
}

---

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