/// <summary>
/// Left mouse button up
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DesignerScrollViewer_OnPreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (ViewModel.MouseMode == MouseMode.Panning || _dragStartPoint.HasValue)
{
DesignerScrollViewer.ReleaseMouseCapture();
_dragStartPoint = null;
e.Handled = true;
}
}
/// <summary>
/// Left mouse button down
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DesignerScrollViewer_OnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (ViewModel.MouseMode == MouseMode.Panning)
{
_dragStartPoint = e.GetPosition(DesignerScrollViewer);
_capturedHorizontalOffset = DesignerScrollViewer.HorizontalOffset;
_capturedVerticalOffset = DesignerScrollViewer.VerticalOffset;
DesignerScrollViewer.CaptureMouse();
Keyboard.Focus(DesignerScrollViewer);
e.Handled = true;
}
}
/// <summary>
/// Mouse move
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DesignerScrollViewer_OnPreviewMouseMove(object sender, MouseEventArgs e)
{
if (ViewModel.MouseMode == MouseMode.Panning)
{
if (_dragStartPoint.HasValue)
{
Vector delta = e.GetPosition(DesignerScrollViewer) - _dragStartPoint.Value;
DesignerScrollViewer.ScrollToHorizontalOffset(_capturedHorizontalOffset - delta.X);
DesignerScrollViewer.ScrollToVerticalOffset(_capturedVerticalOffset - delta.Y);
e.Handled = true;
}
}
}
/// <summary>
/// Mouse wheel used
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DesignerScrollViewer_OnPreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
if (Keyboard.Modifiers != 0)
{
TableViewControl viewControl = e.Source as TableViewControl;
if (viewControl != null)
{
try
{
var grid = viewControl.TableDataGrid;
var item = grid.SelectedItem;
var row = grid.ItemContainerGenerator.ContainerFromItem(item) as DataGridRow;
var cbox = VisualTreeHelperEx.FindDescendantByName(row, "DataTypeComboBox") as ComboBox;
if (cbox != null)
{
cbox.IsDropDownOpen = false;
}
}
catch (Exception exc)
{
Trace.WriteLine(exc.Message);
}
}
}
if ((Keyboard.Modifiers & ModifierKeys.Control) != 0)
{
double newScale = ViewModel.Scale;
if (e.Delta > 0)
{
newScale += 0.05;
}
else if (e.Delta < 0)
{
newScale -= 0.05;
}
ViewModel.ChangeZoomCommand.Execute(newScale.ToString("G"));
e.Handled = true;
}
else if ((Keyboard.Modifiers & ModifierKeys.Shift) != 0)
{
DesignerScrollViewer.ScrollToHorizontalOffset(DesignerScrollViewer.HorizontalOffset + e.Delta);
e.Handled = true;
}
}
private void EditCanvas_MouseWheel(object sender, MouseWheelEventArgs e)
{
DesignerBaseCanvas it1 = sender as DesignerBaseCanvas;
if (it1 == null)
{
return;
}
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
IPagePropertyData page = this.DataContext as IPagePropertyData;
Rect selectWdgBounding = page.BoundingRect;
if (e.Delta > 0)
{
//ExternCanvas.
ScaleTransform scaletransform = ExternCanvasBorder.RenderTransform as ScaleTransform;
scaletransform.ScaleX = PageScaleEnumerator.GetValue(scaletransform.ScaleX, true);// Math.Min(1.7, scaletransform.ScaleX + 0.01);
double hOffset = (selectWdgBounding.Left + selectWdgBounding.Width / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualWidth / 2;
double vOffset = (selectWdgBounding.Top + selectWdgBounding.Height / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualHeight / 2;
DesignerScrollViewer.ScrollToHorizontalOffset(hOffset);
DesignerScrollViewer.ScrollToVerticalOffset(vOffset);
NLogger.Debug("e.Delta: " + e.Delta + " Scale: " + scaletransform.ScaleX + " view width: " + viewWidth + " view height: " + viewHeight + " horizontalOffset: " + hOffset + " verticalOffset:" + vOffset + " DesignerScrollViewer.ActualWidth:" + DesignerScrollViewer.ActualWidth);
}
else if (e.Delta < 0)
{
ScaleTransform scaletransform = ExternCanvasBorder.RenderTransform as ScaleTransform;
scaletransform.ScaleX = PageScaleEnumerator.GetValue(scaletransform.ScaleX, false); //Math.Max(0.3, scaletransform.ScaleX - 0.01);
//scaletransform.ScaleY = PageScaleEnumerator.GetValue(scaletransform.ScaleY, false); //Math.Max(0.3, scaletransform.ScaleY - 0.01);
double hOffset = (selectWdgBounding.Left + selectWdgBounding.Width / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualWidth / 2;
double vOffset = (selectWdgBounding.Top + selectWdgBounding.Height / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualHeight / 2;
DesignerScrollViewer.ScrollToHorizontalOffset(hOffset);
DesignerScrollViewer.ScrollToVerticalOffset(vOffset);
NLogger.Debug("e.Delta: " + e.Delta + " Scale: " + scaletransform.ScaleX + " view width: " + viewWidth + " view height: " + viewHeight + " horizontalOffset: " + hOffset + " verticalOffset:" + vOffset + " DesignerScrollViewer.ActualWidth:" + DesignerScrollViewer.ActualWidth);
}
e.Handled = true;
}
}
private void DesignerScrollViewer_PreviewMouseMove(object sender, MouseEventArgs e)
{
base.OnMouseMove(e);
//double a = e.GetPosition(DesignerScrollViewer).X;
//double b = e.GetPosition(DesignerScrollViewer).Y;
//if (e.LeftButton == MouseButtonState.Pressed)
//{
// Debug.WriteLine("scrollview-->>------" + a + "----" + b);
//}
if (e.LeftButton == MouseButtonState.Pressed)
{
Type ty = e.OriginalSource.GetType();
//if(e.Source is CPSScrollViewer && (e.OriginalSource is Adorner)==false)
//{ return; }
if (e.OriginalSource.GetType().Equals(typeof(Thumb)) ||
e.OriginalSource.GetType().Equals(typeof(RepeatButton)))
{
return;
}
Point position = e.GetPosition(DesignerScrollViewer);
double xScroll = DesignerScrollViewer.ActualWidth - position.X;
double yScroll = DesignerScrollViewer.ActualHeight - position.Y;
if (xScroll < 30)
{
DesignerScrollViewer.ScrollToHorizontalOffset(DesignerScrollViewer.HorizontalOffset + Math.Min(10, Math.Abs(30 - xScroll)));
}
else if (position.X < 10)
{
DesignerScrollViewer.ScrollToHorizontalOffset(DesignerScrollViewer.HorizontalOffset - Math.Min(10, Math.Abs(10 - position.X)));
}
if (yScroll < 30)
{
DesignerScrollViewer.ScrollToVerticalOffset(DesignerScrollViewer.VerticalOffset + Math.Min(10, Math.Abs(30 - yScroll)));
}
else if (position.Y < 10)
{
DesignerScrollViewer.ScrollToVerticalOffset(DesignerScrollViewer.VerticalOffset - Math.Min(10, Math.Abs(10 - position.Y)));
}
}
}
private void EditCanvas_MouseWheel(object sender, MouseWheelEventArgs e)
{
DesignerBaseCanvas it = sender as DesignerBaseCanvas;
if (it == null)
{
return;
}
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
IPagePropertyData page = this.DataContext as IPagePropertyData;
Rect selectWdgBounding = page.BoundingRect;
if (e.Delta > 0)
{
//ExternCanvas.
ScaleTransform scaletransform = ExternCanvasBorder.RenderTransform as ScaleTransform;
//scaletransform.ScaleX = Math.Min(1.7, scaletransform.ScaleX + 0.01);
//scaletransform.ScaleY = Math.Min(1.7, scaletransform.ScaleY + 0.01);
scaletransform.ScaleX = PageScaleEnumerator.GetValue(scaletransform.ScaleX, true);
DesignerScrollViewer.ScrollToHorizontalOffset((selectWdgBounding.Left + selectWdgBounding.Width / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualWidth / 2);
DesignerScrollViewer.ScrollToVerticalOffset((selectWdgBounding.Top + selectWdgBounding.Height / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualHeight / 2);
}
else if (e.Delta < 0)
{
ScaleTransform scaletransform = ExternCanvasBorder.RenderTransform as ScaleTransform;
//scaletransform.ScaleX = Math.Max(0.3, scaletransform.ScaleX - 0.01);
//scaletransform.ScaleY = Math.Max(0.3, scaletransform.ScaleY - 0.01);
scaletransform.ScaleX = PageScaleEnumerator.GetValue(scaletransform.ScaleX, false);
DesignerScrollViewer.ScrollToHorizontalOffset((selectWdgBounding.Left + selectWdgBounding.Width / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualWidth / 2);
DesignerScrollViewer.ScrollToVerticalOffset((selectWdgBounding.Top + selectWdgBounding.Height / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualHeight / 2);
}
e.Handled = true;
}
}
/// <summary>
/// Scale changed
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private void ViewModelOnScaleChanged(object sender, ScaleEventArgs args)
{
double contentHorizontalMiddle = (args.OldHorizontalOffset + args.OldViewportWidth / 2) / args.OldScale;
double contentVerticalMiddle = (args.OldVerticalOffset + args.OldViewportHeight / 2) / args.OldScale;
if ((int)DesignerScrollViewer.ScrollableWidth == 0)
{
contentHorizontalMiddle = ViewModel.CanvasWidth / 2;
}
if ((int)DesignerScrollViewer.ScrollableHeight == 0)
{
contentVerticalMiddle = ViewModel.CanvasHeight / 2;
}
double newContentHorizontalOffset = contentHorizontalMiddle - (ViewModel.ViewportWidth / 2) / ViewModel.Scale;
double newContentVerticalOffset = contentVerticalMiddle - (ViewModel.ViewportHeight / 2) / ViewModel.Scale;
double newHorizontalOffset = newContentHorizontalOffset * ViewModel.Scale;
double newVerticalOffset = newContentVerticalOffset * ViewModel.Scale;
DesignerScrollViewer.ScrollToHorizontalOffset(newHorizontalOffset);
DesignerScrollViewer.ScrollToVerticalOffset(newVerticalOffset);
}
private void UpdateScrollAndScale(DesignerCanvas canvas)
{
if (DataContext is DiagramViewModel && canvas != null)
{
if (canvas != null)
{
DiagramViewModel view = DataContext as DiagramViewModel;
ScaleTransform transform = null;
if (canvas.LayoutTransform is ScaleTransform)
{
transform = canvas.LayoutTransform as ScaleTransform;
}
else
{
transform = new ScaleTransform();
canvas.LayoutTransform = transform;
}
transform.ScaleX = view.Scale;
transform.ScaleY = view.Scale;
DesignerScrollViewer.ScrollToHorizontalOffset(view.HorizontalOffset);
DesignerScrollViewer.ScrollToVerticalOffset(view.VerticalOffset);
}
}
}
private void DesignerScrollViewer_DragOver(object sender, DragEventArgs e)
{
Point position = e.GetPosition(DesignerScrollViewer);
double xScroll = DesignerScrollViewer.ActualWidth - position.X;
double yScroll = DesignerScrollViewer.ActualHeight - position.Y;
if (xScroll < 50)
{
DesignerScrollViewer.ScrollToHorizontalOffset(DesignerScrollViewer.HorizontalOffset + 50 - xScroll);
}
else if (position.X < 30)
{
DesignerScrollViewer.ScrollToHorizontalOffset(DesignerScrollViewer.HorizontalOffset - 30 + position.X);
}
if (yScroll < 50)
{
DesignerScrollViewer.ScrollToVerticalOffset(DesignerScrollViewer.VerticalOffset + 50 - yScroll);
}
else if (position.Y < 30)
{
DesignerScrollViewer.ScrollToVerticalOffset(DesignerScrollViewer.VerticalOffset - 30 + position.Y);
}
}
