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Diagram.vb
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435 lines (352 loc) · 14.9 KB
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Imports System.Windows.Controls.Primitives
Public Class DiagramObject
Dim WithEvents Diagram As FrameworkElement
Dim Pnl As DiagramPanel
Dim DesignerItem As ListBoxItem
Dim Dsn As Designer
Dim Canv As Canvas
Dim Scv As ScrollViewer
Dim DraggingDiagram As Boolean = False
Dim DraggingStartPoint As Point
Dim OldPropertyState As PropertyState
Dim Unit As UndoRedoUnit
Friend Shared Diagrams As New Dictionary(Of FrameworkElement, DiagramObject)
Private Sub New(Diagram As FrameworkElement)
Me.Diagram = Diagram
Diagram.AddHandler(
UIElement.PreviewMouseDownEvent,
New RoutedEventHandler(AddressOf Diagram_PreviewMouseDown),
True
)
Diagram.AddHandler(
UIElement.PreviewMouseLeftButtonDownEvent,
New RoutedEventHandler(AddressOf Diagram_PreviewMouseLeftButtonDown),
True
)
Canv = Helper.GetCanvas(Diagram)
Scv = Helper.GetScrollViewer(Canv)
Dsn = Helper.GetDesigner(Scv)
End Sub
Shared Function CreateDiagramObject(Diagram As FrameworkElement) As DiagramObject
Dim DiagramObj As DiagramObject
If Diagrams.ContainsKey(Diagram) Then
DiagramObj = Diagrams(Diagram)
Else
DiagramObj = New DiagramObject(Diagram)
Diagrams.Add(Diagram, DiagramObj)
End If
DiagramObj.Pnl = Helper.GetDiagramPanel(Diagram)
DiagramObj.DesignerItem = Helper.GetListBoxItem(DiagramObj.Pnl)
Return DiagramObj
End Function
Friend Sub AfterRestoreAction()
Helper.UpdateControl(Diagram)
If Keyboard.FocusedElement IsNot DesignerItem Then
If Not DesignerItem.IsSelected Then
Dsn.SelectedIndex = -1
DesignerItem.IsSelected = True
End If
DesignerItem.Focus()
End If
If Pnl.DiagramGroup IsNot Nothing Then Pnl.DiagramGroup.Select()
Dsn.ScrollIntoView(Diagram)
Helper.UpdateControl(Pnl)
Pnl.DiagramGroup?.UpdateSelection()
Pnl.UpdateLocationBorder()
Dsn.LocationVisibility = Windows.Visibility.Collapsed
End Sub
Friend Function GetLeftTopPoint(Optional relativeTo As FrameworkElement = Nothing, Optional inCm As Boolean = True) As Point
Dim p As Point
Dim Lt = Pnl.FocusRectangle.LayoutTransform
If Lt IsNot Nothing Then p = Lt.Transform(New Point(0, 0))
Dim rt = DesignerItem.RenderTransform
If rt IsNot Nothing Then p = rt.Transform(p)
If relativeTo Is Nothing Then
p = Pnl.FocusRectangle.TransformToVisual(Canv).Transform(p)
Else
p = Pnl.FocusRectangle.TransformToVisual(relativeTo).Transform(p)
End If
If inCm Then
p.X = Math.Round(p.X * Helper.PxToCm, 2)
p.Y = Math.Round(p.Y * Helper.PxToCm, 2)
End If
Return p
End Function
Friend Function GetOriginalPos(transformedPoint As Point, Optional relativeTo As FrameworkElement = Nothing) As Point
Dim p As Point = transformedPoint
' Reverse TransformToVisual
If relativeTo Is Nothing Then
p = Pnl.FocusRectangle.TransformToVisual(Canv).Inverse.Transform(p)
Else
p = Pnl.FocusRectangle.TransformToVisual(relativeTo).Inverse.Transform(p)
End If
' Reverse RenderTransform
Dim rt = DesignerItem.RenderTransform
If rt IsNot Nothing Then p = rt.Inverse.Transform(p)
' Reverse LayoutTransform
Dim Lt = Pnl.FocusRectangle.LayoutTransform
If Lt IsNot Nothing Then p = Lt.Inverse.Transform(p)
Return p
End Function
Private Sub Diagram_MouseLeave(sender As Object, e As MouseEventArgs) Handles Diagram.MouseLeave
If DraggingDiagram Then Diagram_PreviewMouseLeftButtonUp(Nothing, Nothing)
Mouse.OverrideCursor = Nothing
End Sub
Private Sub Diagram_GotFocus(sender As Object, e As EventArgs) Handles Diagram.GotFocus
If Keyboard.Modifiers = ModifierKeys.Control Then
Pnl.IsSelected = Not Pnl.IsSelected
ElseIf Pnl.IsSelected = False Then
Dsn.SelectedIndex = -1
Pnl.IsSelected = True
End If
End Sub
Friend Sub MoveDiagram(HorizontalChange As Double, VerticalChange As Double, Optional IgnoreRotation As Boolean = False)
StartMoveUndo()
DoMoveDiagram(HorizontalChange, VerticalChange, IgnoreRotation)
ReportMoveUndo()
End Sub
Private Sub DoMoveDiagram(HorizontalChange As Double, VerticalChange As Double, Optional IgnoreRotation As Boolean = False)
Dim dragDelta As New Point(HorizontalChange, VerticalChange)
If Not IgnoreRotation Then
Dim rotateTransform As RotateTransform = TryCast(DesignerItem.RenderTransform, RotateTransform)
If rotateTransform IsNot Nothing Then dragDelta = rotateTransform.Transform(dragDelta)
End If
Dim OldLeft = Dsn.SelectedBounds.Left 'Canvas.GetLeft(DesignerItem)
If Double.IsNaN(OldLeft) Then OldLeft = 0
Dim OldTop = Dsn.SelectedBounds.Top 'Canvas.GetTop(DesignerItem)
If Double.IsNaN(OldTop) Then OldTop = 0
Dim NewLeft As Double = OldLeft
If Math.Abs(dragDelta.X) * Helper.PxToCm >= 0.1 Then
'Dim MarginX = (LstDesigner.SelectedBounds.Width - Pnl.ActualWidth) / 2
NewLeft = Math.Max(OldLeft + dragDelta.X, 1)
NewLeft = Math.Min(Canv.ActualWidth - Dsn.SelectedBounds.Width - 1, NewLeft)
NewLeft = Helper.FixToMm(NewLeft)
End If
Dim NewTop As Double = OldTop
If Math.Abs(dragDelta.Y) * Helper.PxToCm >= 0.1 Then
'Dim MarginY = (LstDesigner.SelectedBounds.Height - Pnl.ActualHeight) / 2
NewTop = Math.Max(OldTop + dragDelta.Y, 1)
NewTop = Math.Min(Canv.ActualHeight - Dsn.SelectedBounds.Height - 1, NewTop)
NewTop = Helper.FixToMm(NewTop)
End If
' Agjust TopLeft Point to mm
Dim P = GetLeftTopPoint()
If HorizontalChange > 0 Then
P.X = Math.Ceiling(P.X * 10) / 10 - P.X
Else
P.X = Math.Floor(P.X * 10) / 10 - P.X
End If
NewLeft += P.X * Helper.CmToPx
If VerticalChange > 0 Then
P.Y = Math.Ceiling(P.Y * 10) / 10 - P.Y
Else
P.Y = Math.Floor(P.Y * 10) / 10 - P.Y
End If
NewTop += P.Y * Helper.CmToPx
Dim DeltaX = NewLeft - OldLeft
Dim DeltaY = NewTop - OldTop
If Not DesignerItem.IsSelected Then
Canvas.SetLeft(DesignerItem, Canvas.GetLeft(DesignerItem) + DeltaX)
Canvas.SetTop(DesignerItem, Canvas.GetTop(DesignerItem) + DeltaY)
Pnl.DiagramGroup?.UpdateSelection()
End If
For Each D In Dsn.SelectedItems
Dim Item = Helper.GetListBoxItem(D)
Canvas.SetLeft(Item, Canvas.GetLeft(Item) + DeltaX)
Canvas.SetTop(Item, Canvas.GetTop(Item) + DeltaY)
Helper.GetDiagramPanel(D).DiagramGroup?.UpdateSelection()
Next
Dim scale = TryCast(Canv.LayoutTransform, ScaleTransform)
Dim F = If(scale IsNot Nothing, scale.ScaleX, 1)
Dim Delay = 0
If NewLeft * F <= Scv.HorizontalOffset OrElse
((NewLeft + Dsn.SelectedBounds.Width) * F) >= (Scv.HorizontalOffset + Scv.ViewportWidth) Then
Delay = 40
Scv.ScrollToHorizontalOffset(Scv.HorizontalOffset + DeltaX * F)
End If
If NewTop * F <= Scv.VerticalOffset OrElse
((NewTop + Dsn.SelectedBounds.Height) * F) >= (Scv.VerticalOffset + Scv.ViewportHeight) Then
Delay = 40
Scv.ScrollToVerticalOffset(Scv.VerticalOffset + DeltaY * F)
End If
Dsn.SelectedBounds.X = NewLeft
Dsn.SelectedBounds.Y = NewTop
Pnl.UpdateTbLocation()
Helper.UpdateControl(Dsn)
If Delay > 0 Then Helper.Delay(Delay)
End Sub
Private Sub Diagram_PreviewMouseMove(sender As Object, e As MouseEventArgs) Handles Diagram.PreviewMouseMove
If e.LeftButton = MouseButtonState.Released Then Return
If DraggingDiagram Then
Dim p = e.GetPosition(Pnl)
Dim x = p.X - DraggingStartPoint.X
Dim y = p.Y - DraggingStartPoint.Y
DoMoveDiagram(x, y)
e.Handled = True
End If
End Sub
Private Sub Diagram_PreviewMouseDown(sender As Object, e As MouseButtonEventArgs)
Diagram.CaptureMouse()
DraggingDiagram = True
If DesignerItem.IsSelected Then
Dsn.SelectedBounds = Dsn.GetSelectionBounds()
Diagram_GotFocus(Nothing, Nothing)
Else
Diagram_GotFocus(Nothing, Nothing)
Dsn.SelectedBounds = Dsn.GetSelectionBounds()
End If
Pnl.UpdateLocationBorder()
DraggingStartPoint = e.GetPosition(Pnl)
Pnl.ExitIsSelectedChanged = True
'TmpIsSelected = Pnl.IsSelected
DesignerItem.Focus()
'Pnl.IsSelected = False
StartMoveUndo()
e.Handled = True
End Sub
Private Sub Diagram_PreviewMouseLeftButtonUp(sender As Object, e As MouseButtonEventArgs) Handles Diagram.PreviewMouseLeftButtonUp
Diagram.ReleaseMouseCapture()
DraggingDiagram = False
Pnl.ExitIsSelectedChanged = False
DesignerItem.Focus()
Dsn.LocationVisibility = Visibility.Collapsed
ReportMoveUndo()
End Sub
Private Sub StartMoveUndo()
OldPropertyState = New PropertyState(AddressOf AfterRestoreAction, Diagram, Designer.LeftProperty, Designer.TopProperty)
Unit = New UndoRedoUnit(OldPropertyState)
For Each D As FrameworkElement In Dsn.SelectedItems
If D Is Diagram Then Continue For
Dim Ps As New PropertyState(AddressOf AfterRestoreAction, D, OldPropertyState.Keys.ToArray)
Unit.Add(Ps)
Next
End Sub
Private Sub ReportMoveUndo()
If OldPropertyState IsNot Nothing AndAlso OldPropertyState.HasChanges Then
For Each State As PropertyState In Unit
State.SetNewValues()
Next
Dsn.UndoStack.ReportChanges(Unit)
End If
End Sub
#Region "Editor"
Dim rename As Boolean
Friend Sub BeginEdit(Optional rename As Boolean = False)
Me.rename = rename
Designer.Editing = True
Dim P = GetLeftTopPoint(InCm:=False)
Dsn.Editor.Width = Diagram.ActualWidth
Dsn.Editor.Height = Diagram.ActualHeight
Dsn.Editor.Text = If(rename, Automation.AutomationProperties.GetName(Diagram), Dsn.GetControlText(Diagram))
Dim Pup As Popup = Dsn.Editor.Parent
Pup.PlacementTarget = Diagram
Pup.Placement = PlacementMode.Relative
Pup.StaysOpen = True
Pup.IsOpen = True
Dsn.Editor.Focus()
Dsn.Editor.SelectAll()
AddHandler Dsn.Editor.PreviewKeyDown, AddressOf Editor_PreviewKeyDown
AddHandler Dsn.Editor.PreviewTextInput, AddressOf Editor_PreviewTextInput
AddHandler Dsn.Editor.LostFocus, AddressOf Editor_LostFocus
AddHandler Dsn.PreviewMouseLeftButtonDown, AddressOf Dsn_LeftButtonDown
End Sub
Private Sub Dsn_LeftButtonDown(sender As Object, e As MouseButtonEventArgs)
Dim editor = Helper.GetParent(Of TextBox)(e.OriginalSource)
If editor IsNot Dsn.Editor Then
exitLostFocus = True
EndEdit(True)
e.Handled = True
Dsn.Editor.Focus()
Helper.Dispatcher.BeginInvoke(
System.Windows.Threading.DispatcherPriority.Background,
Sub() exitLostFocus = False
)
End If
End Sub
Private Sub Editor_PreviewTextInput(sender As Object, e As TextCompositionEventArgs)
If Not rename Then Return
Select Case e.Text.ToLower
Case "a" To "z", "_", "0" To "9"
' allowed
Case Else
Beep()
e.Handled = True
End Select
End Sub
Friend Function EndEdit(Commit As Boolean) As Boolean
Designer.Editing = False
If Commit Then
If rename Then
exitLostFocus = True
If Not Dsn.SetControlName(Diagram, Dsn.Editor.Text) Then
exitLostFocus = False
Return False
End If
exitLostFocus = False
Else
Dsn.SetControlText(Dsn.SelectedIndex, Dsn.Editor.Text)
End If
End If
RemoveHandler Dsn.Editor.PreviewKeyDown, AddressOf Editor_PreviewKeyDown
RemoveHandler Dsn.Editor.PreviewTextInput, AddressOf Editor_PreviewTextInput
RemoveHandler Dsn.Editor.LostFocus, AddressOf Editor_LostFocus
RemoveHandler Dsn.PreviewMouseLeftButtonDown, AddressOf Dsn_LeftButtonDown
Dim Pup As Popup = Dsn.Editor.Parent
Pup.IsOpen = False
DesignerItem.Focus()
Return True
End Function
Dim exitLostFocus As Boolean
Public Sub Editor_LostFocus(sender As Object, e As RoutedEventArgs)
If exitLostFocus Then Return
If Not EndEdit(True) Then
e.Handled = True
Helper.Dispatcher.BeginInvoke(
Windows.Threading.DispatcherPriority.Background,
Sub() Dsn.Editor.Focus()
)
End If
End Sub
Private Sub Editor_PreviewKeyDown(sender As Object, e As KeyEventArgs)
If e.Key = Key.Enter Then
If Keyboard.Modifiers = ModifierKeys.Control Then
If rename Then
If Not EndEdit(True) Then
e.Handled = True
Dsn.Editor.Focus()
End If
Else
Dsn.Editor.SelectedText = vbCrLf
Dsn.Editor.SelectionLength = 0
Dsn.Editor.SelectionStart += 2
End If
ElseIf Not EndEdit(True) Then
e.Handled = True
Dsn.Editor.Focus()
End If
ElseIf e.Key = Key.Escape Then
EndEdit(False)
ElseIf e.Key = Key.Space Then
If rename Then
Beep()
e.Handled = True
End If
End If
End Sub
Friend Sub DiagramTextBlock_TextChanged()
'Dsn.SetControlText(Diagram, Pnl.DiagramTextBlock.Text)
End Sub
#End Region
Private Sub Diagram_PreviewMouseLeftButtonDown(sender As Object, e As MouseButtonEventArgs)
If e.ClickCount > 1 Then
Dsn.OnDiagramDoubleClick(Diagram)
End If
End Sub
Private Sub Diagram_PreviewMouseRightButtonUp(sender As Object, e As MouseButtonEventArgs) Handles Diagram.PreviewMouseRightButtonUp
Pnl.ContextMenu.IsOpen = True
e.Handled = True
End Sub
Private Sub Diagram_MouseEnter(sender As Object, e As MouseEventArgs) Handles Diagram.MouseEnter
Mouse.OverrideCursor = Cursors.SizeAll
End Sub
End Class