/// <summary>
/// Method called at the end of manipulation to clean up everything
/// </summary>
private void OnManipulationCompleted()
{
CompositionTarget.Rendering -= CompositionTarget_Rendering;
_refreshIndicatorTransform.TranslateY = -_refreshIndicatorBorder.ActualHeight;
if (_contentTransform != null)
{
_contentTransform.TranslateY = 0;
}
if (_refreshActivated)
{
RefreshRequested?.Invoke(this, new EventArgs());
if (RefreshCommand != null && RefreshCommand.CanExecute(null))
{
RefreshCommand.Execute(null);
}
}
_lastOffset = 0;
_pullDistance = 0;
_refreshActivated = false;
_lastRefreshActivation = default(DateTime);
PullProgressChanged?.Invoke(this, new RefreshProgressEventArgs {
PullProgress = 0
});
}
private void Scroller_DirectManipulationCompleted(object sender, object e)
{
CompositionTarget.Rendering -= CompositionTarget_Rendering;
_refreshIndicatorTransform.TranslateY = -_refreshIndicatorBorder.ActualHeight;
_contentTransform.TranslateY = 0;
if (_refreshActivated)
{
RefreshRequested?.Invoke(this, new EventArgs());
if (RefreshCommand != null && RefreshCommand.CanExecute(null))
{
RefreshCommand.Execute(null);
}
}
_refreshActivated = false;
_lastRefreshActivation = default(DateTime);
if (RefreshIndicatorContent == null)
{
_defaultIndicatorContent.Text = "Pull to Refresh";
}
PullProgressChanged?.Invoke(this, new RefreshProgressEventArgs()
{
PullProgress = 0
});
}
/// <summary>
/// Method called at the end of manipulation to clean up everything
/// </summary>
private void OnManipulationCompleted()
{
CompositionTarget.Rendering -= CompositionTarget_Rendering;
_refreshIndicatorTransform.TranslateY = -_refreshIndicatorBorder.ActualHeight;
if (_contentTransform != null)
{
_contentTransform.TranslateY = 0;
if (_headerTransform != null)
{
_headerTransform.TranslateY = 0;
}
if (_footerTransform != null)
{
_footerTransform.TranslateY = 0;
}
}
if (_refreshActivated)
{
RefreshRequested?.Invoke(this, EventArgs.Empty);
if (RefreshCommand != null && RefreshCommand.CanExecute(null))
{
RefreshCommand.Execute(null);
}
}
else if (_refreshIntentCanceled)
{
RefreshIntentCanceled?.Invoke(this, EventArgs.Empty);
if (RefreshIntentCanceledCommand != null && RefreshIntentCanceledCommand.CanExecute(null))
{
RefreshIntentCanceledCommand.Execute(null);
}
}
_lastOffset = 0;
_pullDistance = 0;
_refreshActivated = false;
_refreshIntentCanceled = false;
_lastRefreshActivation = default(DateTime);
_isManipulatingWithMouse = false;
PullProgressChanged?.Invoke(this, new RefreshProgressEventArgs {
PullProgress = 0
});
_pullAndReleaseIndicatorContent.Content = null;
}
private void CompositionTarget_Rendering(object sender, object e)
{
// if started navigating down, cancel the refresh
if (_scroller.VerticalOffset > 1)
{
CompositionTarget.Rendering -= CompositionTarget_Rendering;
_refreshIndicatorTransform.TranslateY = -_refreshIndicatorBorder.ActualHeight;
if (_contentTransform != null)
{
_contentTransform.TranslateY = 0;
}
_refreshActivated = false;
_lastRefreshActivation = default(DateTime);
PullProgressChanged?.Invoke(this, new RefreshProgressEventArgs {
PullProgress = 0
});
_isManipulatingWithMouse = false;
return;
}
if (_contentTransform == null)
{
var itemScrollPanel = _scrollerContent.FindDescendant <Panel>();
if (itemScrollPanel == null)
{
return;
}
_contentTransform = new CompositeTransform();
itemScrollPanel.RenderTransform = _contentTransform;
}
Rect elementBounds = _scrollerContent.TransformToVisual(_root).TransformBounds(default(Rect));
// content is not "moved" automagically by the scrollviewer in this case
// so we apply our own transformation too and need to take it in account.
if (_isManipulatingWithMouse)
{
elementBounds = _contentTransform.TransformBounds(elementBounds);
}
var offset = elementBounds.Y;
var delta = offset - _lastOffset;
_lastOffset = offset;
_pullDistance += delta * _overscrollMultiplier;
if (_isManipulatingWithMouse)
{
_pullDistance = 2 * offset;
}
if (_pullDistance > 0)
{
if (!_isManipulatingWithMouse)
{
_contentTransform.TranslateY = _pullDistance - offset;
}
_refreshIndicatorTransform.TranslateY = _pullDistance - offset
- _refreshIndicatorBorder.ActualHeight;
}
else
{
if (!_isManipulatingWithMouse)
{
_contentTransform.TranslateY = 0;
}
_refreshIndicatorTransform.TranslateY = -_refreshIndicatorBorder.ActualHeight;
}
double pullProgress;
if (_pullDistance >= PullThreshold)
{
_lastRefreshActivation = DateTime.Now;
_refreshActivated = true;
pullProgress = 1.0;
if (RefreshIndicatorContent == null)
{
if (_defaultIndicatorContent != null)
{
_defaultIndicatorContent.Text = ReleaseToRefreshLabel;
}
if (_pullAndReleaseIndicatorContent != null)
{
_pullAndReleaseIndicatorContent.Content = ReleaseToRefreshContent;
}
}
}
else if (_lastRefreshActivation != DateTime.MinValue)
{
TimeSpan timeSinceActivated = DateTime.Now - _lastRefreshActivation;
// if more then a second since activation, deactivate
if (timeSinceActivated.TotalMilliseconds > 1000)
{
_refreshActivated = false;
_lastRefreshActivation = default(DateTime);
pullProgress = _pullDistance / PullThreshold;
if (RefreshIndicatorContent == null)
{
if (_defaultIndicatorContent != null)
{
_defaultIndicatorContent.Text = PullToRefreshLabel;
}
if (_pullAndReleaseIndicatorContent != null)
{
_pullAndReleaseIndicatorContent.Content = PullToRefreshContent;
}
}
}
else
{
pullProgress = 1.0;
}
}
else
{
pullProgress = _pullDistance / PullThreshold;
}
PullProgressChanged?.Invoke(this, new RefreshProgressEventArgs {
PullProgress = pullProgress
});
}
private void CompositionTarget_Rendering(object sender, object e)
{
// if started navigating down, cancel the refresh
if (ScrollViewer.VerticalOffset > 1)
{
CompositionTarget.Rendering -= CompositionTarget_Rendering;
RefreshIndicatorTransform.TranslateY = -RefreshIndicator.ActualHeight;
if (_contentTransform != null)
{
_contentTransform.TranslateY = 0;
}
_refreshActivated = false;
_lastRefreshActivation = default(DateTime);
PullProgressChanged?.Invoke(this, new RefreshProgressEventArgs {
PullProgress = 0
});
_isManipulatingWithMouse = false;
return;
}
if (_contentTransform == null)
{
var itemsPanel = VisualTreeHelper.GetChild(MainContent as UIElement, 0) as UIElement;
//var headerContent = VisualTreeHelper.GetChild(MainContent, 0) as UIElement;
//var itemsPanel = VisualTreeHelper.GetChild(MainContent, 1) as UIElement;
//var footerContent = VisualTreeHelper.GetChild(MainContent, 2) as UIElement;
//if (_headerTransform == null && VisualTreeHelper.GetChildrenCount(headerContent) > 0)
//{
// if (headerContent != null)
// {
// _headerTransform = new CompositeTransform();
// headerContent.RenderTransform = _headerTransform;
// }
//}
//if (_footerTransform == null && VisualTreeHelper.GetChildrenCount(footerContent) > 0)
//{
// if (footerContent != null)
// {
// _footerTransform = new CompositeTransform();
// footerContent.RenderTransform = _footerTransform;
// }
//}
if (itemsPanel == null)
{
return;
}
_contentTransform = new CompositeTransform();
itemsPanel.RenderTransform = _contentTransform;
}
Rect elementBounds = (MainContent as UIElement).TransformToVisual(Root).TransformBounds(default(Rect));
// content is not "moved" automagically by the scrollviewer in this case
// so we apply our own transformation too and need to take it in account.
if (_isManipulatingWithMouse)
{
elementBounds = _contentTransform.TransformBounds(elementBounds);
}
var offset = elementBounds.Y;
var delta = offset - _lastOffset;
_lastOffset = offset;
_pullDistance += delta * _overscrollMultiplier;
if (_isManipulatingWithMouse)
{
_pullDistance = 2 * offset;
}
if (_pullDistance > 0)
{
if (!_isManipulatingWithMouse)
{
_contentTransform.TranslateY = _pullDistance - offset;
}
if (_isManipulatingWithMouse)
{
RefreshIndicatorTransform.TranslateY = _pullDistance - offset
- RefreshIndicator.ActualHeight;
}
else
{
RefreshIndicatorTransform.TranslateY = _pullDistance
- RefreshIndicator.ActualHeight;
}
}
else
{
if (!_isManipulatingWithMouse)
{
_contentTransform.TranslateY = 0;
}
RefreshIndicatorTransform.TranslateY = -RefreshIndicator.ActualHeight;
}
double pullProgress;
if (_pullDistance >= PullThreshold)
{
_lastRefreshActivation = DateTime.Now;
_refreshActivated = true;
_refreshIntentCanceled = false;
pullProgress = 1.0;
if (RefreshIndicatorContent == null)
{
if (PullAndReleaseIndicatorContent != null)
{
PullAndReleaseIndicatorContent.Content = ReleaseToRefreshContent;
}
}
}
else if (_lastRefreshActivation != DateTime.MinValue)
{
TimeSpan timeSinceActivated = DateTime.Now - _lastRefreshActivation;
// if more then a second since activation, deactivate
if (timeSinceActivated.TotalMilliseconds > 1000)
{
_refreshIntentCanceled |= _refreshActivated;
_refreshActivated = false;
_lastRefreshActivation = default(DateTime);
pullProgress = _pullDistance / PullThreshold;
if (RefreshIndicatorContent == null)
{
if (PullAndReleaseIndicatorContent != null)
{
PullAndReleaseIndicatorContent.Content = PullToRefreshContent;
}
}
}
else
{
pullProgress = 1.0;
_refreshIntentCanceled |= _refreshActivated;
}
}
else
{
pullProgress = _pullDistance / PullThreshold;
_refreshIntentCanceled |= _refreshActivated;
}
PullProgressChanged?.Invoke(this, new RefreshProgressEventArgs {
PullProgress = pullProgress
});
}
private void CompositionTarget_Rendering(object sender, object e)
{
// if started navigating down, cancel the refresh
if (_scroller.VerticalOffset > 1)
{
CompositionTarget.Rendering -= CompositionTarget_Rendering;
_refreshIndicatorTransform.TranslateY = -_refreshIndicatorBorder.ActualHeight;
if (_contentTransform != null)
{
_contentTransform.TranslateY = 0;
}
_refreshActivated = false;
_lastRefreshActivation = default(DateTime);
PullProgressChanged?.Invoke(this, new RefreshProgressEventArgs()
{
PullProgress = 0
});
return;
}
if (_contentTransform == null)
{
var itemScrollPanel = _scrollerContent.FindDescendant <Panel>();
if (itemScrollPanel == null)
{
return;
}
_contentTransform = new CompositeTransform();
itemScrollPanel.RenderTransform = _contentTransform;
}
Rect elementBounds = _scrollerContent.TransformToVisual(_root).TransformBounds(default(Rect));
var offset = elementBounds.Y;
var delta = offset - _lastOffset;
_lastOffset = offset;
_pullDistance += delta * _overscrollMultiplier;
if (_pullDistance > 0)
{
_contentTransform.TranslateY = _pullDistance - offset;
_refreshIndicatorTransform.TranslateY = _pullDistance - offset - _refreshIndicatorBorder.ActualHeight;
}
else
{
_contentTransform.TranslateY = 0;
_refreshIndicatorTransform.TranslateY = -_refreshIndicatorBorder.ActualHeight;
}
var pullProgress = 0.0;
if (_pullDistance >= PullThreshold)
{
_lastRefreshActivation = DateTime.Now;
_refreshActivated = true;
pullProgress = 1.0;
if (RefreshIndicatorContent == null)
{
_defaultIndicatorContent.Text = ReleaseToRefreshLabel;
}
}
else if (_lastRefreshActivation != DateTime.MinValue)
{
TimeSpan timeSinceActivated = DateTime.Now - _lastRefreshActivation;
// if more then a second since activation, deactivate
if (timeSinceActivated.TotalMilliseconds > 1000)
{
_refreshActivated = false;
_lastRefreshActivation = default(DateTime);
pullProgress = _pullDistance / PullThreshold;
if (RefreshIndicatorContent == null)
{
_defaultIndicatorContent.Text = PullToRefreshLabel;
}
}
else
{
pullProgress = 1.0;
}
}
else
{
pullProgress = _pullDistance / PullThreshold;
}
if (PullProgressChanged != null)
{
PullProgressChanged(this, new RefreshProgressEventArgs()
{
PullProgress = pullProgress
});
}
}