Supponendo di
gestire lo SWIPE orizzontale per un componente, i passi da seguire sono questi
- Nello XAML, aggiungere al TAG
UI l'attributo ManipulationMode="xxxxx" (valori possibili: All,
None, Rotate, RotateInertia, Scale, ScaleInertia, System,
TranslateInertia, TranslateRailsX, TranslateRailsY, TranslateX,
TranslateY)
- Nel caso di SWIPE
orizzontale, scegliere TranslateX
- Nel codice aggiungere le
seguenti variabili globali della pagine/Usercontrol
private TransformGroup _transformGroup;
private MatrixTransform
_previousTransform;
private CompositeTransform
_compositeTransform;
private bool
forceManipulationsToEnd;
private bool
hasMovedRight;
private bool hasMovedLeft;
- Modificare il costruttore
come segue, e aggiungere i metodi come nell'esempio
public ucAlbum()
{
this.InitializeComponent();
forceManipulationsToEnd = false;
hasMovedRight = false;
hasMovedLeft = false;
gAlbum.ManipulationStarting += new
ManipulationStartingEventHandler(gAlbum_ManipulationStarting);
gAlbum.ManipulationStarted += new
ManipulationStartedEventHandler(gAlbum_ManipulationStarted);
gAlbum.ManipulationDelta += new
ManipulationDeltaEventHandler(gAlbum_ManipulationDelta);
gAlbum.ManipulationCompleted += new
ManipulationCompletedEventHandler(gAlbum_ManipulationCompleted);
gAlbum.ManipulationInertiaStarting += new
ManipulationInertiaStartingEventHandler(gAlbum_ManipulationInertiaStarting);
ManipulationReset();
}
void ManipulationReset()
{
forceManipulationsToEnd = true;
hasMovedRight = false;
hasMovedLeft = false;
gAlbum.RenderTransform
= null;
InitManipulationTransforms();
}
private void
InitManipulationTransforms()
{
_transformGroup = new
TransformGroup();
_compositeTransform =
new CompositeTransform();
_previousTransform =
new MatrixTransform() { Matrix = Matrix.Identity };
_transformGroup.Children.Add(_previousTransform);
_transformGroup.Children.Add(_compositeTransform);
gAlbum.RenderTransform
= _transformGroup;
}
void
gAlbum_ManipulationStarting(object sender, ManipulationStartingRoutedEventArgs
e)
{
forceManipulationsToEnd = false;
e.Handled = true;
}
void
gAlbum_ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e)
{
e.Handled = true;
}
void
gAlbum_ManipulationInertiaStarting(object sender,
ManipulationInertiaStartingRoutedEventArgs e)
{
e.Handled = true;
}
void
gAlbum_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
if
(forceManipulationsToEnd)
{
e.Complete();
return;
}
//hasMovedRight =
true;
if
(e.Delta.Translation.X < 0) hasMovedLeft = true;
else hasMovedRight =
true;
//_previousTransform.Matrix = _transformGroup.Value;
//Point center =
_previousTransform.TransformPoint(new Point(e.Position.X, e.Position.Y));
//_compositeTransform.CenterX = center.X;
//_compositeTransform.CenterY = center.Y;
//_compositeTransform.Rotation = e.Delta.Rotation;
//_compositeTransform.ScaleX = _compositeTransform.ScaleY =
e.Delta.Scale;
//_compositeTransform.TranslateX = e.Delta.Translation.X;
//_compositeTransform.TranslateY = e.Delta.Translation.Y;
e.Handled = true;
}
void
gAlbum_ManipulationCompleted(object sender,
ManipulationCompletedRoutedEventArgs e)
{
if (hasMovedLeft)
{
if
(currentPage<CSticker.ALBUM_PAGES) currentPage++;
}
else if (hasMovedRight)
{
if (currentPage > 0)
currentPage--;
}
loadAlbum();
ManipulationReset();
e.Handled = true;
}
- In giallo è evidenziata
l'azione da fare quando la gesture è finita.
