private void _list_PreviewTouchMove(object sender, TouchEventArgs e)
{
//if (debug_canvas == null)
//{
// debug_canvas = new Canvas();
// debug_canvas.Width = window_manager.main_canvas.ActualWidth;
// debug_canvas.Height = window_manager.main_canvas.ActualHeight;
// window_manager.main_canvas.Children.Add(debug_canvas);
//}
IInputElement ie = e.TouchDevice.Captured;
FrameworkElement findSource = e.Source as FrameworkElement;
ListBoxItem element = null;
while (element == null && findSource != null)
if ((element = findSource as ListBoxItem) == null)
findSource = VisualTreeHelper.GetParent(findSource) as FrameworkElement;
if (!touch_points.ContainsKey(e.TouchDevice.Id))
{
touch_info t = new touch_info();
t.id = e.TouchDevice.Id; t.is_tap = false; t.points.Add(e.GetTouchPoint(this._list as IInputElement));
this.touch_points.Add(e.TouchDevice.Id, t);
}
else
{
this.touch_points[e.TouchDevice.Id].points.Add(e.GetTouchPoint(this._list as IInputElement));
}
if (touch_points[e.TouchDevice.Id].is_drag == true) return;
//TextBlock t1 = new TextBlock(); t1.Foreground = Brushes.White;
//Canvas.SetLeft(t1, 80); Canvas.SetTop(t1, debug_var);
//t1.Text = e.GetTouchPoint(this._list as IInputElement).Position.X + ", " + e.GetTouchPoint(this._list as IInputElement).Position.Y;
//t1.FontSize = 14; t1.FontWeight = FontWeights.Bold;
//debug_canvas.Children.Add(t1);
//debug_var = debug_var + 30;
//if (debug_var > 1200) { debug_var = 10; debug_canvas.Children.RemoveRange(0, debug_canvas.Children.Count); }
if (touch_points[e.TouchDevice.Id].points.Count < configurations.min_touch_points) return;
double dy = touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 1].Position.Y - touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 2].Position.Y;
double dx = touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 1].Position.X - touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 2].Position.X;
double size_n = Math.Sqrt(dx * dx + dy * dy);
dx = dx / size_n; dy = dy / size_n;
if (dx == double.NaN || dy == double.NaN) return;
double theta1 = Math.Acos(dx * drag_direction1.X + dy * drag_direction1.Y);
double theta2 = Math.Acos(dx * drag_direction2.X + dy * drag_direction2.Y);
//convert to degree
theta1 = theta1 * 180 / Math.PI;
theta2 = theta2 * 180 / Math.PI;
double theta = (theta1 < theta2) ? theta1 : theta2;
if (theta < configurations.drag_collection_theta && configurations.whole_item_drag)
{
if (touch_points[e.TouchDevice.Id].consecutive_drag_points < configurations.max_consecutive_drag_points)
{
touch_points[e.TouchDevice.Id].consecutive_drag_points++;
}
else
{
touch_points[e.TouchDevice.Id].is_tap = false;
if (touch_points[e.TouchDevice.Id].initial_attended_item != null)
attend_on_item(false, touch_points[e.TouchDevice.Id].initial_attended_item);
//if (element == null) element = last_dragged_element;
//if (configurations.whole_item_drag)
//{
UIElement dragged_item = HitTestOverItem(e, true, true, false, false);
if (dragged_item != null)
{
//avatar_drag(element, e.TouchDevice);
bool result = false;
if (dragged_item.GetType() == Type.GetType("nature_net.user_controls.item_generic_v2"))
result = start_drag((item_generic_v2)dragged_item, e);
//else
// result = start_drag((Image)dragged_item, e.TouchDevice);
touch_points[e.TouchDevice.Id].is_drag = true;
touch_points[e.TouchDevice.Id].points.Clear();
touch_points[e.TouchDevice.Id].consecutive_drag_points = 0;
e.Handled = true;
touch_points.Remove(e.TouchDevice.Id);
return;
}
//}
}
}
FadingScrollViewer scroll = configurations.GetDescendantByType(this._list, typeof(FadingScrollViewer)) as FadingScrollViewer;
//double dv = touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 1].Position.Y - touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 2].Position.Y;
//double dh = touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 1].Position.X - touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 2].Position.X;
double dv = touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 1].Position.Y - touch_points[e.TouchDevice.Id].points[0].Position.Y;
double dh = touch_points[e.TouchDevice.Id].points[touch_points[e.TouchDevice.Id].points.Count - 1].Position.X - touch_points[e.TouchDevice.Id].points[0].Position.X;
//if (touch_points[e.TouchDevice.Id].points.Count > 4)
// dv++;
if (Math.Abs(dv) > configurations.tap_error || Math.Abs(dh) > configurations.tap_error)
{
touch_points[e.TouchDevice.Id].is_tap = false;
if (touch_points[e.TouchDevice.Id].initial_attended_item != null)
attend_on_item(false, touch_points[e.TouchDevice.Id].initial_attended_item);
}
if (!selectable) this._list.SelectedIndex = -1;
if (configurations.manual_scroll)
{
if (is_horizontal)
{
double new_offset = scroll.HorizontalOffset + (-1 * dh);
try { scroll.ScrollToHorizontalOffset(new_offset); }
catch (Exception) { }
//last_scroll_offset = scroll.HorizontalOffset;
}
else
{
double new_offset = scroll.VerticalOffset + (-1 * dv);
try { scroll.ScrollToVerticalOffset(new_offset); }
catch (Exception) { }
//last_scroll_offset = scroll.VerticalOffset;
}
}
}
private void _list_PreviewTouchDown(object sender, TouchEventArgs e)
{
if (e.Handled)
return;
if (!touch_points.ContainsKey(e.TouchDevice.Id))
{
touch_info t = new touch_info();
t.id = e.TouchDevice.Id; t.is_tap = true; t.points.Add(e.GetTouchPoint(this._list as IInputElement));
try { t.initial_attended_item = (Control)e.Source; }
catch (Exception) { }
this.touch_points.Add(e.TouchDevice.Id, t);
}
else
{
}
FadingScrollViewer scroll = configurations.GetDescendantByType(this._list, typeof(FadingScrollViewer)) as FadingScrollViewer;
if (is_horizontal)
last_scroll_offset = scroll.HorizontalOffset;
else
last_scroll_offset = scroll.VerticalOffset;
//scroll.Elasticity = new Vector(0.0, 0.4);
if (configurations.right_panel_drag)
{
UIElement dragged_item = null;
if (collection_list)
dragged_item = HitTestOverItem(e, true, false, false, true);
else
dragged_item = HitTestOverItem(e, true, true, false, false);
if (dragged_item != null)
{
//avatar_drag(element, e.TouchDevice);
bool result = false;
if (dragged_item.GetType() == Type.GetType("nature_net.user_controls.item_generic_v2"))
result = start_drag((item_generic_v2)dragged_item, e);
if (dragged_item.GetType() == Type.GetType("nature_net.user_controls.collection_listbox_item"))
result = start_drag((collection_listbox_item)dragged_item, e.TouchDevice);
touch_points[e.TouchDevice.Id].is_drag = true;
touch_points[e.TouchDevice.Id].points.Clear();
touch_points[e.TouchDevice.Id].consecutive_drag_points = 0;
e.Handled = true;
touch_points.Remove(e.TouchDevice.Id);
return;
}
}
if (configurations.manual_scroll)
{
bool r = e.TouchDevice.Capture(this._list as IInputElement, CaptureMode.SubTree);
e.Handled = true;
touch_points.Remove(e.TouchDevice.Id);
return;
}
if (touch_points[e.TouchDevice.Id].initial_attended_item != null)
attend_on_item(true, touch_points[e.TouchDevice.Id].initial_attended_item);
}