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@@ -63,6 +63,39 @@ namespace PDF_Office.Views.PageEdit
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/// </summary>
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private ScrollEventType scrolltype = ScrollEventType.EndScroll;
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+ //鼠标点击时在item中的位置 实现类似点哪拖哪的细节
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+ private double item_x;
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+
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+ private double item_y;
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+
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+ //插入标记代表的插入位置
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+ private int InsertIndex = -1;
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+
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+ //拖动的Item
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+ private ListBoxItem tempItem;
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+
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+ ///鼠标是否停留在item前半部
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+ ///显示在前半部时，获取的index为实际索引值
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+ ///显示在后半部时，获取的index需要+1
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+ private bool isFrontHalf = false;
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+
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+ /// <summary>
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+ /// 是否正在拖拽排序中，通过该变量避免单击触发拖动
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+ /// </summary>
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+ private bool isDraging = false;
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+
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+ //是否正在从外部拖入文件
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+ private bool isDragingEnter = false;
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+
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+ /// <summary>
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+ /// 是否需要自动滚动
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+ /// </summary>
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+
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+ private bool needScroll = false;
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+
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+ //自动滚动速度
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+ private int speed = 0;
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+
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public PageEditContent()
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{
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InitializeComponent();
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@@ -239,6 +272,7 @@ namespace PDF_Office.Views.PageEdit
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{
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if (e.LeftButton == MouseButtonState.Pressed)
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{
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+ //鼠标框选逻辑
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if (startChoose)
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{
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var position = e.GetPosition(ListPageEdit);
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@@ -246,55 +280,66 @@ namespace PDF_Office.Views.PageEdit
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{
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startChoose = false;
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RectChoose.Visibility = Visibility.Collapsed;
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- Mouse.Capture(null);//暂时未想到靠近顶部和底部自动翻滚的好方法，只能先屏蔽这部分功能
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+ //暂时未想到靠近顶部和底部自动翻滚的好方法，只能先屏蔽这部分功能
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+ Mouse.Capture(null);
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return;
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}
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+ //矩形框内的item设为选中
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DoSelectItems();
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return;
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}
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//拖拽排序的逻辑
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- //var pos = e.GetPosition(ListPageEdit);
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- //if (pos.Y < 0 || pos.Y > ListPageEdit.ActualHeight)
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- //{
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- // MidLane.Visibility = Visibility.Collapsed;
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- // return;
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- //}
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- //HitTestResult result = VisualTreeHelper.HitTest(PageEditListBox, pos);
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- //if (result == null)
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- //{
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- // return;
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- //}
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- //var listBoxItem = CommonHelper.FindVisualParent<ListBoxItem>(result.VisualHit);
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- //if (listBoxItem == null)
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- //{
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- // return;
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- //}
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- //isDragingEnter = false;
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- //tempItem = listBoxItem;
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- //var panel = GetPanel(tempItem);
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-
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- //var item_pos = e.GetPosition(panel);
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- //if (item_pos != null)
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- //{
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- // item_x = item_pos.X;
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- // item_y = item_pos.Y;
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- //}
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- //var scroll = GetScrollHost(PageEditListBox);
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- //DataObject dataObj = new DataObject(listBoxItem.Content as StackPanel);
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- //DragDrop.DoDragDrop(PageEditListBox, dataObj, DragDropEffects.Move);
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- //Mouse.Capture(PageEditListBox);
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- //return;
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+ var pos = e.GetPosition(ListPageEdit);
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+ if (pos.Y < 0 || pos.Y > ListPageEdit.ActualHeight)
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+ {
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+ LineInset.Visibility = Visibility.Collapsed;
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+ return;
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+ }
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+ HitTestResult result = VisualTreeHelper.HitTest(ListPageEdit, pos);
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+ if (result == null)
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+ {
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+ return;
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+ }
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+ var listBoxItem = CommonHelper.FindVisualParent<ListBoxItem>(result.VisualHit);
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+ if (listBoxItem == null)
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+ {
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+ return;
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+ }
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+ isDragingEnter = false;
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+ tempItem = listBoxItem;
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+
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+ var item_pos = e.GetPosition(tempItem);
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+ if (item_pos != null)
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+ {
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+ item_x = item_pos.X;
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+ item_y = item_pos.Y;
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+ }
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+ var scroll = GetScrollHost(ListPageEdit);
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+
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+ //string tempPath = System.IO.Path.Combine(System.IO.Path.GetTempPath(), "Temp.pdf");
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+ //System.IO.File.Create(tempPath);
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+ //string[] files = new string[1];
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+ //files[0] = tempPath;
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+ DataObject dataObj = new DataObject(DataFormats.FileDrop);
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+ DragDrop.DoDragDrop(ListPageEdit, dataObj, DragDropEffects.Move);
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+ Mouse.Capture(ListPageEdit);
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+ return;
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}
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RectChoose.Visibility = Visibility.Collapsed;
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startChoose = false;
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Mouse.Capture(null);
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}
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- catch (Exception ex)
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+ catch
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{
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- // MidLane.Visibility = Visibility.Collapsed;
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+ LineInset.Visibility = Visibility.Collapsed;
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}
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}
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+ /// <summary>
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+ /// 判断是否开始框选、记录框选起始位置
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+ /// </summary>
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+ /// <param name="sender"></param>
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+ /// <param name="e"></param>
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private void ListPageEdit_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
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{
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var pos = e.GetPosition(ListPageEdit);
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@@ -315,13 +360,17 @@ namespace PDF_Office.Views.PageEdit
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}
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//点击空白处时开始框选
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startChoose = true;
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- ListPageEdit.SelectedItems.Clear();
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+ if (ListPageEdit.SelectedItems.Count > 0)
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+ {
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+ ListPageEdit.SelectedItems.Clear();
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+ }
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starPosition = e.GetPosition(ListPageEdit);
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starPosition = new Point(starPosition.X, starPosition.Y + GetWrapPanel(ListPageEdit).VerticalOffset);
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Mouse.Capture(ListPageEdit);
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return;
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}
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- startChoose = false;//选中了item 时，不能框选
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+ //选中了item 时，不能框选
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+ startChoose = false;
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}
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private void ListPageEdit_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
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@@ -380,5 +429,497 @@ namespace PDF_Office.Views.PageEdit
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return;
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}
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+ /// <summary>
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+ /// 计算插入标记线和虚影显示
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+ /// </summary>
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+ /// <param name="sender"></param>
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+ /// <param name="e"></param>
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+ private void ListPageEdit_DragOver(object sender, DragEventArgs e)
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+ {
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+ try
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+ {
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+ //ctrl建按下 不显示插入标记和虚影 因为释放不会响应drop事件
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+ if (e.KeyStates == (DragDropKeyStates.ControlKey | DragDropKeyStates.LeftMouseButton) || e.KeyStates == (DragDropKeyStates.ShiftKey | DragDropKeyStates.LeftMouseButton | DragDropKeyStates.ControlKey))
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+ return;
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+
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+ //滚动后有 位置不准确 要减去滚动偏移量
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+ //控制线的位置
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+ var pos = e.GetPosition(ListPageEdit);
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+ var result = VisualTreeHelper.HitTest(ListPageEdit, pos);
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+ if (result == null)
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+ {
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+ //MidLane.Visibility = Visibility.Collapsed;
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+ //return;
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+ }
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+
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+ //获取当前鼠标指针下的容器
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+ var listBoxItem = CommonHelper.FindVisualParent<ListBoxItem>(result.VisualHit);
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+ if (listBoxItem == null)
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+ {
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+ //MidLane.Visibility = Visibility.Collapsed;
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+ //return;
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+ }
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+
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+ #region 计算虚影位置
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+ //xaml层 要设置 虚影控件为左上
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+ double xPos = 0;
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+ double yPos = 0;
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+ //内部拖动
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+ if (!isDragingEnter)
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+ {
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+ //Viewbox viewBox = (tempItem.Content as StackPanel).Children[0] as Viewbox;//获取item宽度
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+
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+ ImgPicture.Width = tempItem.ActualWidth;
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+ ImgPicture.Height = tempItem.ActualHeight;
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+ ImgPicture.Source = (tempItem.DataContext as PageEditItem).Image;
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+ xPos = e.GetPosition(ListPageEdit).X - item_x;
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+ yPos = e.GetPosition(ListPageEdit).Y - item_y;
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+ }
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+ //else
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+ //{
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+ // //从外部拖入的逻辑
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+ // //var pic = ToBitmapSource(dragingEnterPath);
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+ // //ShadowPicture.Width = pic.Width;
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+ // //ShadowPicture.Height = pic.Height;
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+ // //ShadowPicture.Source = pic;
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+ // //xPos = e.GetPosition(ListPageEdit).X - pic.Width / 2;
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+ // //yPos = e.GetPosition(ListPageEdit).Y - pic.Height / 2;
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+ //}
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+
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+ ImgPicture.Margin = new Thickness(xPos, yPos, 0, 0);
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+ #endregion
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+
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+ #region 计算插入标记位置
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+ var scroll = GetScrollHost(ListPageEdit);
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+ if (listBoxItem != null)
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+ {
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+ //虚拟化影响到该值计算
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+ var p = VisualTreeHelper.GetOffset(listBoxItem);//计算控件在容器中的偏移(位置)
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+ LineInset.Visibility = Visibility.Visible;
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+
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+ var panel = GetWrapPanel(ListPageEdit);
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+ var item = (ListPageEdit.ItemContainerGenerator.ContainerFromIndex(0) as ListBoxItem).DesiredSize.Width;
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+
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+ int count = (int)(panel.ViewportWidth / item);
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+ var gap = (panel.ViewportWidth - count * item) / (count + 1) * 1.0;
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+
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+ LineInset.X2 = LineInset.X1 = p.X + gap / 2 + listBoxItem.DesiredSize.Width;
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+
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+ if (pos.X < p.X + gap / 2 + listBoxItem.ActualWidth / 2)
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+ {
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+ isFrontHalf = true;//前半部 线条出现在位置前
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+ LineInset.X2 = LineInset.X1 = p.X - gap / 2;
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+ InsertIndex = ListPageEdit.Items.IndexOf(listBoxItem);
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+ }
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+ else
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+ {
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+ isFrontHalf = false;
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+ InsertIndex = ListPageEdit.Items.IndexOf(listBoxItem) + 1;
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+ }
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+ //MidLane.Y1 = p.Y - scroll.VerticalOffset;//向下滑动后要减去滑动值
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+ LineInset.Y1 = p.Y;
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+ if (LineInset.Y1 < 0)//避免超出上边界
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+ {
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+ LineInset.Y1 = 0;
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+ }
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+ //MidLane.Y2 = p.Y + listBoxItem.ActualHeight - scroll.VerticalOffset;//仿智能滚动后可能会导致 垂直滚动偏量不准确
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+ LineInset.Y2 = p.Y + listBoxItem.ActualHeight;
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+ if (LineInset.Y2 < 0)
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+ {
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+ LineInset.Y2 = 0;
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+ }
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+ }
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+ #endregion
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+
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+ //暂时处理 鼠标移出边框时，虚影的显示问题
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+ if (pos.Y <= 30 || pos.Y >= ListPageEdit.ActualHeight - 10)
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+ {
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+ LineInset.Visibility = Visibility.Collapsed;
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+ needScroll = false;
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+ }
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+
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+ if (pos.X <= 40 || pos.X >= scroll.ViewportWidth - 50)
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+ {
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+ LineInset.Visibility = Visibility.Collapsed;
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+ needScroll = false;
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+ }
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+
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+ #region 靠近上下边界时，自动滚动，离边界越近，滚动速度越快
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+ //speed = 0;
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+ //if (pos.Y >= PageEditListBox.ActualHeight - 30)
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+ //{
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+ // speed = 30 - (int)(PageEditListBox.ActualHeight - pos.Y);
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+ // needScroll = true;
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+ //}
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+ //else if (pos.Y <= 30)
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+ //{
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+ // speed = (int)(pos.Y - 30);
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+ // needScroll = true;
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+ //}
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+ //else
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+ // needScroll = false;
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+
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+ //var v = scroll.VerticalOffset;
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+ //scroll.ScrollToVerticalOffset(v + speed);//触发连续滚动
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+ #endregion
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+ }
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+ catch (Exception ex)
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+ {
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+
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+ }
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+ }
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+
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+ /// <summary>
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+ /// 退出拖拽模式
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+ /// </summary>
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+ private void ExitDraging()
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+ {
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+ LineInset.Visibility = Visibility.Collapsed;
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+ isDraging = false;
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+ }
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+
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+ /// <summary>
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+ /// 拖拽释放后的处理逻辑
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+ /// </summary>
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+ /// <param name="sender"></param>
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+ /// <param name="e"></param>
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+ private void ListPageEdit_Drop(object sender, DragEventArgs e)
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+ {
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+ needScroll = false;
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+ if (!isDraging)
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+ {
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+ //未拖拽时隐藏插入标记和虚影
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+ LineInset.Visibility = Visibility.Collapsed;
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+ return;
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+ }
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+ #region 功能付费锁
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+ // //if (!App.IsActive())
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+ // //{
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+ // // MidLane.Visibility = Visibility.Collapsed;
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+ // // IAPFunctionDialog dialog = new IAPFunctionDialog("PageEdit");
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+ // // dialog.ShowDialog();
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+ // // return;
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+ // //}
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+ #endregion
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+
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+ #region 从外部拖拽插入文件
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+ //if (isDragingEnter)
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+ //{
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+
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+
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+ // //在当前位置插入整个pdf
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+ // CPDFDocument dragDoc = CPDFDocument.InitWithFilePath(dragingEnterPath);
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+ // if (dragDoc.IsLocked)
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+ // {
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+ // VerifyPasswordDialog dialog = new VerifyPasswordDialog(dragDoc);
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+ // dialog.ShowDialog();
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+ // if (dragDoc.IsLocked)
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+ // return;
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+ // }
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+ // if (dragingEnterPath.Substring(dragingEnterPath.LastIndexOf(".")).ToLower() == ".pdf")
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+ // {
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+ // if (dragDoc != null)
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+ // {
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+ // int index = InsertIndex == -1 ? 0 : InsertIndex;
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+ // pdfViewer.Document.ImportPagesAtIndex(dragDoc, "1-" + dragDoc.PageCount, index);
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+ // PopulateThumbnailList();
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+ // ItemsInViewHitTest();
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+
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+ // pdfViewer.UndoManager.ClearHistory();
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+ // pdfViewer.UndoManager.CanSave = true;
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+ // pdfViewer.ReloadDocument();
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+ // PageEditListBox.ScrollIntoView(PageEditListBox.SelectedItem as ListBoxItem);
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+ // PageMoved.Invoke(this, new RoutedEventArgs());
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+ // PDFViewerCtrl viewerCtrl = ParentPage?.GetCurrentViewer();
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+ // if (viewerCtrl != null)
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+ // {
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+ // viewerCtrl.IsPageEdit = true;
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+ // }
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+ // dragDoc.Release();
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+ // }
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+ // else
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+ // {
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+ // MessageBoxEx.Show(App.MainPageLoader.GetString("Merge_FileCannotOpenedWarningd"));
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+ // }
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+ // //提示文档损坏无法打开
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+ // }
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+ // else if (!string.IsNullOrEmpty(dragingEnterPath))
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+ // {
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+ // //其他文件 则新增一个页签打开
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+ // // DragAddTab.Invoke(dragingEnterPath, new RoutedEventArgs());//底层库需要加一个 Load(TPDFDocument)的接口
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|
+ // }
|
|
|
+ // MidLane.Visibility = Visibility.Collapsed;
|
|
|
+ // isDragingEnter = false;
|
|
|
+ // dragingEnterPath = null;
|
|
|
+ // return;
|
|
|
+ //}
|
|
|
+ #endregion
|
|
|
+
|
|
|
+ var pos = e.GetPosition(ListPageEdit);
|
|
|
+ var result = VisualTreeHelper.HitTest(ListPageEdit, pos);
|
|
|
+ if (result == null)
|
|
|
+ {
|
|
|
+ //超出当前可控区域
|
|
|
+ ExitDraging();
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ //查找元数据
|
|
|
+ var sourcePerson = e.Data.GetData(typeof(StackPanel)) as StackPanel;
|
|
|
+ if (sourcePerson == null)
|
|
|
+ {
|
|
|
+ ExitDraging();
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ //查找目标数据
|
|
|
+ int targetindex = 0;//目标插入位置
|
|
|
+ if (InsertIndex != -1)
|
|
|
+ {
|
|
|
+ //往前移动时 此index 不是准确的，需要处理++
|
|
|
+ targetindex = InsertIndex;
|
|
|
+ }
|
|
|
+ else//基本不会命中 仅作为保险措施
|
|
|
+ {
|
|
|
+ var listBoxItem = CommonHelper.FindVisualParent<ListBoxItem>(result.VisualHit);
|
|
|
+ if (listBoxItem == null)
|
|
|
+ {
|
|
|
+ ////鼠标停留在两个item之间或其他无效区域 暂时不做处理(比较麻烦)
|
|
|
+ ExitDraging();
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ var targetPerson = listBoxItem;
|
|
|
+ targetPerson.Opacity = 1;
|
|
|
+ sourcePerson.Opacity = 1;
|
|
|
+ if (ReferenceEquals(targetPerson, sourcePerson))
|
|
|
+ {
|
|
|
+ ExitDraging();
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ targetindex = ListPageEdit.Items.IndexOf(targetPerson);
|
|
|
+ }
|
|
|
+
|
|
|
+ List<ListBoxItem> list = new List<ListBoxItem>();
|
|
|
+ List<int> sourceindex = new List<int>();//需要保存每个页面对应的位置
|
|
|
+ //开始排序
|
|
|
+ List<int> pages = new List<int>();
|
|
|
+ //要先对所有选中项 根据页码排序
|
|
|
+ for (int i = 0; i < ListPageEdit.SelectedItems.Count; i++)
|
|
|
+ {
|
|
|
+ var pageindex = ListPageEdit.Items.IndexOf(ListPageEdit.SelectedItems[i] as ListBoxItem);
|
|
|
+ pages.Add(pageindex);//存入的为页码索引值
|
|
|
+ }
|
|
|
+ pages.Sort();
|
|
|
+ if (pages.Count <= 0)
|
|
|
+ {
|
|
|
+ ExitDraging();
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ //要考虑每一次交换都会导致局部页码发生改变
|
|
|
+ //每次整体往后移动时，先移动大页码；整体往前移动时，先移动小页码；往中间移动时，再按上述两种情况分别移动
|
|
|
+ //if (targetindex <= pages[0])// 目标位置在所有选中内容左边,整体前移动 优先先判断左移的情况
|
|
|
+ //{
|
|
|
+ // sourceindex.Add(-1);
|
|
|
+ // list = new List<ListBoxItem>();
|
|
|
+ // for (int i = 0; i < pages.Count; i++)
|
|
|
+ // {
|
|
|
+ // list.Add(PageEditListBox.Items[pages[i]] as ListBoxItem);
|
|
|
+ // sourceindex.Add(pages[i]);
|
|
|
+ // DragToSort(pages[i], targetindex + i);
|
|
|
+ // }
|
|
|
+ //}
|
|
|
+ //else if (targetindex > pages[pages.Count - 1])//目标位置在所有选中内容右边 整体后移
|
|
|
+ //{
|
|
|
+ // sourceindex.Add(1);
|
|
|
+ // list = new List<ListBoxItem>();
|
|
|
+ // for (int i = 0; i < pages.Count; i++)
|
|
|
+ // {
|
|
|
+ // list.Add(PageEditListBox.Items[pages[pages.Count - 1 - i]] as ListBoxItem);
|
|
|
+ // sourceindex.Add(pages[pages.Count - 1 - i]);
|
|
|
+ // DragToSort(pages[pages.Count - 1 - i], targetindex - 1 - i/* + (PageEditListBox.SelectedItems.Count - 1 - i)*/);
|
|
|
+ // }
|
|
|
+ //}
|
|
|
+ //else//目标位置在所有选中项中间
|
|
|
+ //{
|
|
|
+ // int i, j, k;
|
|
|
+ // for (k = 0; k < pages.Count - 1; k++)//找出PageEditListBox.Items中页码等于destpage的下标
|
|
|
+ // {
|
|
|
+ // //这里要算入K---即前面部分的页面个数
|
|
|
+ // if (pages[k] < targetindex && pages[k + 1] >= targetindex)
|
|
|
+ // break;
|
|
|
+ // }
|
|
|
+
|
|
|
+ // sourceindex.Add(0);
|
|
|
+ // list = new List<ListBoxItem>();
|
|
|
+ // for (i = 0; i <= k; i++)//局部往后移动
|
|
|
+ // {
|
|
|
+ // list.Add(PageEditListBox.Items[pages[k - i]] as ListBoxItem);
|
|
|
+ // sourceindex.Add(pages[k - i]);
|
|
|
+ // DragToSort(pages[k - i], targetindex - 1 - i);
|
|
|
+ // }
|
|
|
+ // for (j = i; j < pages.Count; j++)//局部往前移动
|
|
|
+ // {
|
|
|
+ // list.Add(PageEditListBox.Items[pages[j]] as ListBoxItem);
|
|
|
+ // sourceindex.Add(pages[j]);
|
|
|
+ // DragToSort(pages[j], targetindex);
|
|
|
+ // targetindex++;
|
|
|
+ // }
|
|
|
+ // sourceindex.Add(k);//往中间移时， index数组的最后一位 表示 间隔位置K
|
|
|
+ //}
|
|
|
+ isDraging = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ private void MidLane_Drop(object sender, DragEventArgs e)
|
|
|
+ {
|
|
|
+ ListPageEdit_Drop(sender, e);
|
|
|
+ }
|
|
|
+
|
|
|
+ private void ImgPicture_Drop(object sender, DragEventArgs e)
|
|
|
+ {
|
|
|
+ ListPageEdit_Drop(sender, e);
|
|
|
+ }
|
|
|
+
|
|
|
+ /// <summary>
|
|
|
+ /// 拖拽事件写在外部的Grid里，会更加流畅
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="sender"></param>
|
|
|
+ /// <param name="e"></param>
|
|
|
+ private void Grid_DragOver(object sender, DragEventArgs e)
|
|
|
+ {
|
|
|
+ try
|
|
|
+ {
|
|
|
+ //ctrl建按下 不显示插入标记和虚影 因为释放不会响应drop事件
|
|
|
+ if (e.KeyStates == (DragDropKeyStates.ControlKey | DragDropKeyStates.LeftMouseButton) || e.KeyStates == (DragDropKeyStates.ShiftKey | DragDropKeyStates.LeftMouseButton | DragDropKeyStates.ControlKey))
|
|
|
+ return;
|
|
|
+
|
|
|
+ //滚动后有 位置不准确 要减去滚动偏移量
|
|
|
+ //控制线的位置
|
|
|
+ var pos = e.GetPosition(ListPageEdit);
|
|
|
+ var result = VisualTreeHelper.HitTest(ListPageEdit, pos);
|
|
|
+ if (result == null)
|
|
|
+ {
|
|
|
+ //MidLane.Visibility = Visibility.Collapsed;
|
|
|
+ //return;
|
|
|
+ }
|
|
|
+
|
|
|
+ //获取当前鼠标指针下的容器
|
|
|
+ var listBoxItem = CommonHelper.FindVisualParent<ListBoxItem>(result.VisualHit);
|
|
|
+ if (listBoxItem == null)
|
|
|
+ {
|
|
|
+ //MidLane.Visibility = Visibility.Collapsed;
|
|
|
+ //return;
|
|
|
+ }
|
|
|
+
|
|
|
+ #region 计算虚影位置
|
|
|
+ //xaml层 要设置 虚影控件为左上
|
|
|
+ double xPos = 0;
|
|
|
+ double yPos = 0;
|
|
|
+ //内部拖动
|
|
|
+ if (!isDragingEnter)
|
|
|
+ {
|
|
|
+ //Viewbox viewBox = (tempItem.Content as StackPanel).Children[0] as Viewbox;//获取item宽度
|
|
|
+
|
|
|
+ ImgPicture.Width = tempItem.ActualWidth;
|
|
|
+ ImgPicture.Height = tempItem.ActualHeight;
|
|
|
+ ImgPicture.Source = (tempItem.DataContext as PageEditItem).Image;
|
|
|
+ xPos = e.GetPosition(ListPageEdit).X - item_x;
|
|
|
+ yPos = e.GetPosition(ListPageEdit).Y - item_y;
|
|
|
+ }
|
|
|
+ //else
|
|
|
+ //{
|
|
|
+ // //从外部拖入的逻辑
|
|
|
+ // //var pic = ToBitmapSource(dragingEnterPath);
|
|
|
+ // //ShadowPicture.Width = pic.Width;
|
|
|
+ // //ShadowPicture.Height = pic.Height;
|
|
|
+ // //ShadowPicture.Source = pic;
|
|
|
+ // //xPos = e.GetPosition(ListPageEdit).X - pic.Width / 2;
|
|
|
+ // //yPos = e.GetPosition(ListPageEdit).Y - pic.Height / 2;
|
|
|
+ //}
|
|
|
+
|
|
|
+ ImgPicture.Margin = new Thickness(xPos, yPos, 0, 0);
|
|
|
+ #endregion
|
|
|
+
|
|
|
+ #region 计算插入标记位置
|
|
|
+ var scroll = GetScrollHost(ListPageEdit);
|
|
|
+ if (listBoxItem != null)
|
|
|
+ {
|
|
|
+ //虚拟化影响到该值计算
|
|
|
+ var p = VisualTreeHelper.GetOffset(listBoxItem);//计算控件在容器中的偏移(位置)
|
|
|
+ LineInset.Visibility = Visibility.Visible;
|
|
|
+
|
|
|
+ var panel = GetWrapPanel(ListPageEdit);
|
|
|
+
|
|
|
+ //var item = panel.ItemSize.Width;
|
|
|
+ //var item = (ListPageEdit.ItemContainerGenerator.ContainerFromIndex(0) as ListBoxItem).DesiredSize.Width;
|
|
|
+ var item = listBoxItem.DesiredSize.Width;
|
|
|
+
|
|
|
+ int count = (int)(panel.ViewportWidth / item);
|
|
|
+ var gap = (panel.ViewportWidth - count * item) / (count + 1) * 1.0;
|
|
|
+
|
|
|
+ LineInset.X2 = LineInset.X1 = p.X + gap / 2 + listBoxItem.DesiredSize.Width;
|
|
|
+
|
|
|
+ if (pos.X < p.X + gap / 2 + listBoxItem.ActualWidth / 2)
|
|
|
+ {
|
|
|
+ isFrontHalf = true;//前半部 线条出现在位置前
|
|
|
+ LineInset.X2 = LineInset.X1 = p.X - gap / 2;
|
|
|
+ InsertIndex = ListPageEdit.Items.IndexOf(listBoxItem);
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ isFrontHalf = false;
|
|
|
+ InsertIndex = ListPageEdit.Items.IndexOf(listBoxItem) + 1;
|
|
|
+ }
|
|
|
+ //MidLane.Y1 = p.Y - scroll.VerticalOffset;//向下滑动后要减去滑动值
|
|
|
+ LineInset.Y1 = p.Y;
|
|
|
+ if (LineInset.Y1 < 0)//避免超出上边界
|
|
|
+ {
|
|
|
+ LineInset.Y1 = 0;
|
|
|
+ }
|
|
|
+ //MidLane.Y2 = p.Y + listBoxItem.ActualHeight - scroll.VerticalOffset;//仿智能滚动后可能会导致 垂直滚动偏量不准确
|
|
|
+ LineInset.Y2 = p.Y + listBoxItem.ActualHeight;
|
|
|
+ if (LineInset.Y2 < 0)
|
|
|
+ {
|
|
|
+ LineInset.Y2 = 0;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endregion
|
|
|
+
|
|
|
+ //暂时处理 鼠标移出边框时，虚影的显示问题
|
|
|
+ if (pos.Y <= 30 || pos.Y >= ListPageEdit.ActualHeight - 10)
|
|
|
+ {
|
|
|
+ LineInset.Visibility = Visibility.Collapsed;
|
|
|
+ needScroll = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (pos.X <= 40 || pos.X >= scroll.ViewportWidth - 50)
|
|
|
+ {
|
|
|
+ LineInset.Visibility = Visibility.Collapsed;
|
|
|
+ needScroll = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ #region 靠近上下边界时，自动滚动，离边界越近，滚动速度越快
|
|
|
+ speed = 0;
|
|
|
+ if (pos.Y >= ListPageEdit.ActualHeight - 30)
|
|
|
+ {
|
|
|
+ speed = 30 - (int)(ListPageEdit.ActualHeight - pos.Y);
|
|
|
+ needScroll = true;
|
|
|
+ }
|
|
|
+ else if (pos.Y <= 30)
|
|
|
+ {
|
|
|
+ speed = (int)(pos.Y - 30);
|
|
|
+ needScroll = true;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ needScroll = false;
|
|
|
+
|
|
|
+ var v = scroll.VerticalOffset;
|
|
|
+ scroll.ScrollToVerticalOffset(v + speed);//触发连续滚动
|
|
|
+ #endregion
|
|
|
+ }
|
|
|
+ catch
|
|
|
+ {
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
}
|
|
|
}
|
ZhouJieSheng