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添加项目文件。

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liufei
2021-04-12 13:46:05 +08:00
parent b2b912a812
commit cc399e2ef7
32 changed files with 3794 additions and 0 deletions
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DraggAnimatedPanel/DraggAnimatedPanel.Drag.cs Normal file
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/*Developed by (doiTTeam)=>doiTTeam.mail = devdoiTTeam@gmail.com*/
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;
namespace DraggAnimatedPanel
{
/// <summary>
/// Description of SafariPanel_Drag.
/// </summary>
public partial class DraggAnimatedPanel
{
#region const drag
const double mouseDif = 2d;
const int mouseTimeDif = 25;
#endregion
#region private
UIElement __draggedElement;
public UIElement _draggedElement {
get { return __draggedElement; }
set
{
__draggedElement = value;
}
}
int _draggedIndex;
bool _firstScrollRequest = true;
ScrollViewer _scrollContainer;
ScrollViewer scrollViewer
{
get
{
if (_firstScrollRequest && _scrollContainer == null)
{
_firstScrollRequest = false;
_scrollContainer = (ScrollViewer)GetParent(this as DependencyObject, (ve)=>ve is ScrollViewer);
}
return _scrollContainer;
}
}
#endregion
#region private drag
double _lastMousePosX;
double _lastMousePosY;
int _lastMouseMoveTime;
double _x;
double _y;
Rect _rectOnDrag;
#endregion
void OnMouseMove(object sender,MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed && _draggedElement == null && !this.IsMouseCaptured)
StartDrag(e);
else if (_draggedElement != null)
OnDragOver(e);
}
void OnDragOver(MouseEventArgs e)
{
Point mousePos = Mouse.GetPosition(this);
double difX = mousePos.X - _lastMousePosX;
double difY = mousePos.Y - _lastMousePosY;
int timeDif = e.Timestamp - _lastMouseMoveTime;
if ((Math.Abs(difX) > mouseDif || Math.Abs(difY) > mouseDif) && timeDif > mouseTimeDif)
{
//this lines is for keepn draged item inside control bounds
DoScroll();
if (_x + difX < _rectOnDrag.Location.X)
_x = 0;
else if (ItemsWidth + _x + difX > _rectOnDrag.Location.X + _rectOnDrag.Width)
_x = _rectOnDrag.Location.X + _rectOnDrag.Width - ItemsWidth;
else if (mousePos.X > _rectOnDrag.Location.X && mousePos.X < _rectOnDrag.Location.X + _rectOnDrag.Width)
_x += difX;
if (_y + difY < _rectOnDrag.Location.Y)
_y = 0;
else if (ItemsHeight + _y + difY > _rectOnDrag.Location.Y + _rectOnDrag.Height)
_y = _rectOnDrag.Location.Y + _rectOnDrag.Height - ItemsHeight;
else if (mousePos.Y > _rectOnDrag.Location.Y && mousePos.Y < _rectOnDrag.Location.Y + _rectOnDrag.Height)
_y += difY;
//lines ends
AnimateTo(_draggedElement,_x,_y, 0);
_lastMousePosX = mousePos.X;
_lastMousePosY = mousePos.Y;
_lastMouseMoveTime = e.Timestamp;
SwapElement(_x + ItemsWidth/2 , _y + ItemsHeight/2);
}
}
void StartDrag(MouseEventArgs e)
{
Point mousePos = Mouse.GetPosition(this);
_draggedElement = GetChildThatHasMouseOver();
if (_draggedElement == null)
return;
_draggedIndex = Children.IndexOf(_draggedElement);
_rectOnDrag = VisualTreeHelper.GetDescendantBounds(this);
Point p = GetItemVisualPoint(_draggedElement);
_x = p.X;
_y = p.Y;
SetZIndex(_draggedElement,1000);
_lastMousePosX = mousePos.X;
_lastMousePosY = mousePos.Y;
_lastMouseMoveTime = e.Timestamp;
this.InvalidateArrange();
e.Handled = true;
this.CaptureMouse();
}
void OnMouseUp(object sender,MouseEventArgs e)
{
if (this.IsMouseCaptured)
ReleaseMouseCapture();
}
void SwapElement(double x, double y)
{
int index = GetIndexFromPoint(x,y);
if (index == _draggedIndex || index < 0)
return;
if (index >= Children.Count)
index = Children.Count - 1;
int[] parameter = new int[]{_draggedIndex, index};
if (SwapCommand != null && SwapCommand.CanExecute(parameter))
{
SwapCommand.Execute(parameter);
_draggedElement = Children[index]; //this is bcause after changing the collection the element is other
FillNewDraggedChild(_draggedElement);
_draggedIndex = index;
}
this.InvalidateArrange();
}
void FillNewDraggedChild(UIElement child)
{
if (child.RenderTransform as TransformGroup == null)
{
child.RenderTransformOrigin = new Point(0.5, 0.5);
TransformGroup group = new TransformGroup();
child.RenderTransform = group;
group.Children.Add(new TranslateTransform());
}
SetZIndex(child,1000);
AnimateTo(child,_x,_y, 0); //need relocate the element
}
void OnLostMouseCapture(object sender,MouseEventArgs e)
{
FinishDrag();
}
void FinishDrag()
{
if (_draggedElement != null)
{
SetZIndex(_draggedElement,0);
_draggedElement = null;
this.InvalidateArrange();
}
}
void DoScroll()
{
if (scrollViewer != null)
{
Point position = Mouse.GetPosition(scrollViewer);
double scrollMargin = Math.Min(scrollViewer.FontSize * 2, scrollViewer.ActualHeight / 2);
if (position.X >= scrollViewer.ActualWidth - scrollMargin &&
scrollViewer.HorizontalOffset < scrollViewer.ExtentWidth - scrollViewer.ViewportWidth)
{
scrollViewer.LineRight();
}
else if (position.X < scrollMargin && scrollViewer.HorizontalOffset > 0)
{
scrollViewer.LineLeft();
}
else if (position.Y >= scrollViewer.ActualHeight - scrollMargin &&
scrollViewer.VerticalOffset < scrollViewer.ExtentHeight - scrollViewer.ViewportHeight)
{
scrollViewer.LineDown();
}
else if (position.Y < scrollMargin && scrollViewer.VerticalOffset > 0)
{
scrollViewer.LineUp();
}
}
}
}
}