public override void ComputeScroll()
{
if (!_dragHelper.ContinueSettling(true))
{
return;
}
if (!_canSlide)
{
_dragHelper.Abort();
return;
}
ViewCompat.PostInvalidateOnAnimation(this);
}
private void IncrementSnapback()
{
if (scroller.IsFinished)
{
return;
}
var more = scroller.ComputeScrollOffset();
Header.OffsetTopAndBottom(current_scroll_y - scroller.CurrY);
((View)ContentView).OffsetTopAndBottom(current_scroll_y - scroller.CurrY);
current_scroll_y = scroller.CurrY;
if (more)
{
ViewCompat.PostInvalidateOnAnimation(this);
}
}
private bool SmoothSlideTo(float slideOffset)
{
if (!_canSlide)
{
return(false);
}
var y = _isSlidingUp
? (int)(SlidingTop + slideOffset * _slideRange)
: (int)(SlidingTop - slideOffset * _slideRange);
if (!_dragHelper.SmoothSlideViewTo(_slideableView, _slideableView.Left, y))
{
return(false);
}
SetAllChildrenVisible();
ViewCompat.PostInvalidateOnAnimation(this);
return(true);
}
/**
* Close the panel to hide the secondary view
* @param animation true to animate the close motion. {@link SwipeListener} won't be
* called if is animation is false.
*/
public void close(bool animation)
{
CoreUtility.ExecuteMethod("close", delegate()
{
mIsOpenBeforeInit = false;
mAborted = false;
if (animation)
{
mState = STATE_CLOSING;
mDragHelper.SmoothSlideViewTo(mMainView, mRectMainClose.Left, mRectMainClose.Top);
if (mDragStateChangeListener != null)
{
mDragStateChangeListener.onDragStateChanged(mState);
}
}
else
{
mState = STATE_CLOSE;
mDragHelper.Abort();
mMainView.Layout(
mRectMainClose.Left,
mRectMainClose.Top,
mRectMainClose.Right,
mRectMainClose.Bottom
);
mSecondaryView.Layout(
mRectSecClose.Left,
mRectSecClose.Top,
mRectSecClose.Right,
mRectSecClose.Bottom
);
}
ViewCompat.PostInvalidateOnAnimation(this);
});
}
public override void OnViewPositionChanged(View changedView, int left, int top, int dx, int dy)
{
base.OnViewPositionChanged(changedView, left, top, dx, dy);
if (_layout.mMode == MODE_SAME_LEVEL)
{
if (_layout.mDragEdge == DRAG_EDGE_LEFT || _layout.mDragEdge == DRAG_EDGE_RIGHT)
{
_layout.mSecondaryView.OffsetLeftAndRight(dx);
}
else
{
_layout.mSecondaryView.OffsetTopAndBottom(dy);
}
}
bool isMoved = (_layout.mMainView.Left != _layout.mLastMainLeft) || (_layout.mMainView.Top != _layout.mLastMainTop);
if (_layout.mSwipeListener != null && isMoved)
{
if (_layout.mMainView.Left == _layout.mRectMainClose.Left && _layout.mMainView.Top == _layout.mRectMainClose.Top)
{
_layout.mSwipeListener.onClosed(_layout);
}
else if (_layout.mMainView.Left == _layout.mRectMainOpen.Left && _layout.mMainView.Top == _layout.mRectMainOpen.Top)
{
_layout.mSwipeListener.onOpened(_layout);
}
else
{
_layout.mSwipeListener.onSlide(_layout, getSlideOffset());
}
}
_layout.mLastMainLeft = _layout.mMainView.Left;
_layout.mLastMainTop = _layout.mMainView.Top;
ViewCompat.PostInvalidateOnAnimation(_layout);
}
public override bool OnTouchEvent(MotionEvent e)
{
if (!IsPullEnabled)
{
return(base.OnTouchEvent(e));
}
if (null == ContentView)
{
return(base.OnTouchEvent(e));
}
if (ContentView is AbsListView && ((AbsListView)ContentView).FastScrollEnabled)
{
// An adimittedly crude way to determine if touch is in fast scroll, but
// should accomplish the goal of not displaying ptr header.
// This is crude because there is not a definitive way to determine
// a) if the fast scroller is visible or
// b) the width of the scroller
if (Resources.DisplayMetrics.WidthPixels - e.RawX < fastscroll_thumb_width)
{
return(false); // let the list view handle this
}
}
switch (e.ActionMasked)
{
case MotionEventActions.Down:
last_touch_y = ContentView.IsAtTop ? (int)e.RawY : -1;
if (!ContentView.IsAtTop)
{
send_down_event = false; // because this event will reach the ContentView
}
else
{
should_send_down_before_up = true;
}
return(ContentView.IsAtTop);
case MotionEventActions.Move:
if (did_steal_event_stream && current_scroll_y >= 0)
{
if (send_down_event)
{
did_steal_event_stream = false;
send_down_event = false;
ContentView.IgnoreTouchEvents = false;
SendFakeEvent(e, MotionEventActions.Down);
}
return(true);
}
if (last_touch_y == -1)
{
last_touch_y = (int)e.RawY;
return(true);
}
var y_delta = last_touch_y - (int)e.RawY;
last_touch_y = (int)e.RawY;
bool isMovingUp = y_delta > 0;
if (isMovingUp && current_scroll_y >= 0 || !ContentView.IsAtTop)
{
should_send_down_before_up = false;
ContentView.ForceHandleTouchEvent(e);
return(true);
}
if (ContentView.IsAtTop)
{
var new_scroll_to = isMovingUp ? (int)y_delta : (int)(y_delta * PullDownTensionFactor);
// see if this will fully hide the header
if (current_scroll_y < 0 && current_scroll_y + new_scroll_to > 0)
{
// only scroll enough to hide the header
new_scroll_to = -current_scroll_y;
}
current_scroll_y += new_scroll_to;
Header.OffsetTopAndBottom(-new_scroll_to);
((View)ContentView).OffsetTopAndBottom(-new_scroll_to);
ViewCompat.PostInvalidateOnAnimation(this);
if (current_scroll_y == 0)
{
ContentView.IgnoreTouchEvents = false;
return(true);
}
else
{
should_cancel_before_up = true;
should_send_down_before_up = false;
}
if (Math.Abs(current_scroll_y) >= header_measured_height)
{
if (refresh_state != PullToRefresharpRefreshState.Refreshing)
{
SetPullDownIconProgress(1);
UpdateRefreshState(PullToRefresharpRefreshState.ReleaseToRefresh);
}
}
else
{
// Don't update anything if we are refreshing.
if (refresh_state != PullToRefresharpRefreshState.Refreshing)
{
SetPullDownIconProgress((float)Math.Abs(current_scroll_y) / (float)header_measured_height);
UpdateRefreshState(PullToRefresharpRefreshState.PullToRefresh);
}
}
return(true);
}
return(false);
case MotionEventActions.Up:
return(HandleUpEvent(e));
}
return(base.OnTouchEvent(e));
}
public void Draw(Canvas canvas)
{
var clipPath = new Path();
clipPath.AddRoundRect(_bounds, _cornerRadius, _cornerRadius, Path.Direction.Cw);
int width = (int)_bounds.Width();
int height = (int)_bounds.Height();
int cx = width / 2;
int cy = height / 2;
bool drawTriggerWhileFinishing = false;
int restoreCount = canvas.Save();
canvas.ClipPath(clipPath);
if (_running || _finishTime > 0)
{
long now = AnimationUtils.CurrentAnimationTimeMillis();
long elapsed = (now - _startTime) % ANIMATION_DURATION_MS;
long iterations = (now - _startTime) / ANIMATION_DURATION_MS;
float rawProgress = (elapsed / (ANIMATION_DURATION_MS / 100f));
if (!_running)
{
if ((now - _finishTime) >= FINISH_ANIMATION_DURATION_MS)
{
_finishTime = 0;
return;
}
// Otherwise, use a 0 opacity alpha layer to clear the animation
// from the inside out. This layer will prevent the circles from
// drawing within its bounds.
long finishEplapsed = (now - _finishTime) % FINISH_ANIMATION_DURATION_MS;
float finishProgress = (finishEplapsed / (FINISH_ANIMATION_DURATION_MS / 100f));
float pct = finishProgress / 100f;
float clearRadius = width / 2 * _interpolator.GetInterpolation(pct);
_rectF.Set(cx - clearRadius, 0, cx + clearRadius, height);
canvas.SaveLayerAlpha(_rectF, 0, 0);
// Only draw the trigger if there is a space in the center of
// this refreshing view that needs to be filled in by the
// trigger. If the progress view is just still animating, let it
// continue animating.
drawTriggerWhileFinishing = true;
}
// First fill in with the last color that would have finished drawing.
if (iterations == 0)
{
canvas.DrawColor(ColorUtils.FromUint(_color1));
}
else
{
if (rawProgress >= 0 && rawProgress < 25)
{
canvas.DrawColor(ColorUtils.FromUint(_color4));
}
else if (rawProgress >= 25 && rawProgress < 50)
{
canvas.DrawColor(ColorUtils.FromUint(_color1));
}
else if (rawProgress >= 50 && rawProgress < 75)
{
canvas.DrawColor(ColorUtils.FromUint(_color2));
}
else
{
canvas.DrawColor(ColorUtils.FromUint(_color3));
}
}
// Then draw up to 4 overlapping concentric circles of varying radii, based on how far
// along we are in the cycle.
// progress 0-50 draw mColor2
// progress 25-75 draw mColor3
// progress 50-100 draw mColor4
// progress 75 (wrap to 25) draw mColor1
if (rawProgress >= 0 && rawProgress <= 25)
{
float pct = (rawProgress + 25) * 2 / 100f;
DrawCircle(canvas, cx, cy, _color1, pct);
}
if (rawProgress >= 0 && rawProgress <= 50)
{
float pct = ((rawProgress * 2) / 100f);
DrawCircle(canvas, cx, cy, _color2, pct);
}
if (rawProgress >= 25 && rawProgress <= 75)
{
float pct = (((rawProgress - 25) * 2) / 100f);
DrawCircle(canvas, cx, cy, _color3, pct);
}
if (rawProgress >= 50 && rawProgress <= 100)
{
float pct = (((rawProgress - 50) * 2) / 100f);
DrawCircle(canvas, cx, cy, _color4, pct);
}
if ((rawProgress >= 75 && rawProgress <= 100))
{
float pct = (((rawProgress - 75) * 2) / 100f);
DrawCircle(canvas, cx, cy, _color1, pct);
}
if (_triggerPercentage > 0 && drawTriggerWhileFinishing)
{
canvas.RestoreToCount(restoreCount);
restoreCount = canvas.Save();
canvas.ClipPath(clipPath);
DrawTrigger(canvas, cx, cy);
}
ViewCompat.PostInvalidateOnAnimation(_parent);
}
else if (_triggerPercentage > 0 && _triggerPercentage < 1.0)
{
DrawTrigger(canvas, cx, cy);
}
canvas.RestoreToCount(restoreCount);
}
public void draw(Canvas canvas)
{
int width = mBounds.Width();
int height = mBounds.Height();
int cx = width / 2;
int cy = height / 2;
Boolean drawTriggerWhileFinishing = false;
int restoreCount = canvas.Save();
canvas.ClipRect(mBounds);
if (mRunning || (mFinishTime > 0))
{
long now = AnimationUtils.CurrentAnimationTimeMillis();
long elapsed = (now - mStartTime) % ANIMATION_DURATION_MS;
long iterations = (now - mStartTime) / ANIMATION_DURATION_MS;
float rawProgress = (elapsed / (ANIMATION_DURATION_MS / 100f));
// If we're not running anymore, that means we're running through
// the finish animation.
if (!mRunning)
{
// If the finish animation is done, don't draw anything, and
// don't repost.
if ((now - mFinishTime) >= FINISH_ANIMATION_DURATION_MS)
{
mFinishTime = 0;
return;
}
// Otherwise, use a 0 opacity alpha layer to clear the animation
// from the inside out. This layer will prevent the circles from
// drawing within its bounds.
long finishElapsed = (now - mFinishTime) % FINISH_ANIMATION_DURATION_MS;
float finishProgress = (finishElapsed / (FINISH_ANIMATION_DURATION_MS / 100f));
float pct = (finishProgress / 100f);
// Radius of the circle is half of the screen.
float clearRadius = width / 2; //* INTERPOLATOR.getInterpolation(pct);
mClipRect.Set(cx - clearRadius, 0, cx + clearRadius, height);
canvas.SaveLayerAlpha(mClipRect, 0, 0);
// Only draw the trigger if there is a space in the center of
// this refreshing view that needs to be filled in by the
// trigger. If the progress view is just still animating, let it
// continue animating.
drawTriggerWhileFinishing = true;
}
// First fill in with the last color that would have finished drawing.
if (iterations == 0)
{
canvas.DrawColor(Android.Graphics.Color.Blue);
}
else
{
if (rawProgress >= 0 && rawProgress < 25)
{
canvas.DrawColor(Android.Graphics.Color.AliceBlue);
}
else if (rawProgress >= 25 && rawProgress < 50)
{
canvas.DrawColor(Android.Graphics.Color.Blue);
}
else if (rawProgress >= 50 && rawProgress < 75)
{
canvas.DrawColor(Android.Graphics.Color.BlueViolet);
}
else
{
canvas.DrawColor(Android.Graphics.Color.CadetBlue);
}
}
// Then draw up to 4 overlapping concentric circles of varying radii, based on how far
// along we are in the cycle.
// progress 0-50 draw mColor2
// progress 25-75 draw mColor3
// progress 50-100 draw mColor4
// progress 75 (wrap to 25) draw mColor1
if ((rawProgress >= 0 && rawProgress <= 25))
{
float pct = (((rawProgress + 25) * 2) / 100f);
drawCircle(canvas, cx, cy, mColor1, pct);
}
if (rawProgress >= 0 && rawProgress <= 50)
{
float pct = ((rawProgress * 2) / 100f);
drawCircle(canvas, cx, cy, mColor2, pct);
}
if (rawProgress >= 25 && rawProgress <= 75)
{
float pct = (((rawProgress - 25) * 2) / 100f);
drawCircle(canvas, cx, cy, mColor3, pct);
}
if (rawProgress >= 50 && rawProgress <= 100)
{
float pct = (((rawProgress - 50) * 2) / 100f);
drawCircle(canvas, cx, cy, mColor4, pct);
}
if ((rawProgress >= 75 && rawProgress <= 100))
{
float pct = (((rawProgress - 75) * 2) / 100f);
drawCircle(canvas, cx, cy, mColor1, pct);
}
if (mTriggerPercentage > 0 && drawTriggerWhileFinishing)
{
// There is some portion of trigger to draw. Restore the canvas,
// then draw the trigger. Otherwise, the trigger does not appear
// until after the bar has finished animating and appears to
// just jump in at a larger width than expected.
canvas.RestoreToCount(restoreCount);
restoreCount = canvas.Save();
canvas.ClipRect(mBounds);
drawTrigger(canvas, cx, cy);
}
// Keep running until we finish out the last cycle.
ViewCompat.PostInvalidateOnAnimation(mParent);
}
else
{
// Otherwise if we're in the middle of a trigger, draw that.
if (mTriggerPercentage > 0 && mTriggerPercentage <= 1.0)
{
drawTrigger(canvas, cx, cy);
}
}
canvas.RestoreToCount(restoreCount);
}
