Drawing lines and link them for moving and rotating

[guilz2010]

Hi,

1)
I would like to draw lines on teechart and with a command, duplicate selected line and link it to parent. So after that when I move the first line, the second is moved too (like with horizontal or vertical parallel style)

How can I do that ?

In the code bellow I write the duplicate line function but lines are not linked between them so when I move the first one, the second one does not move

Code: Select all

Private Sub Command1_Click()
    Dim currentLineIndex As Integer
    
    TChart1.Tools.Items(0).asDrawLine.SelectNewLines = True
    
    currentLineIndex = TChart1.Tools.Items(0).asDrawLine.Selected
    
    Dim oLine As IDrawLine
    Set oLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex)
    With oLine
        Call TChart1.Tools.Items(0).asDrawLine.AddLine(.StartPos.X, .StartPos.Y - 100, .EndPos.X, .EndPos.Y - 100)
    End With
    Dim nLine As IDrawLine
    Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex + 1)
    With nLine
        .Pen.Color = oLine.Pen.Color
        .Pen.Style = oLine.Pen.Style
    End With
    
End Sub

2)
I would like to rotate selected lines with mouse. How can I do that ?

Thanks a lot for your help

Kind regards,

Guilz

ps : I use Teechart v8 (because v2010 is not very stable actually )

[Yeray]

Hello Guilz,

Using the v2010, the code bellow drags the drawn lines correctly.
Could you please check it for you?

Code: Select all

Dim oLine, nLine As IDrawLine

Private Sub Form_Load()  
  TChart1.Aspect.View3D = False
  
  TChart1.AddSeries scLine
  TChart1.Series(0).FillSampleValues
  
  TChart1.Tools.Add tcDrawLine
End Sub

Private Sub TChart1_OnDrawLineToolLineDrag()
  Dim currentLineIndex As Integer
  currentLineIndex = TChart1.Tools.Items(0).asDrawLine.Selected
  If currentLineIndex > -1 Then
    Set oLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex)
    If currentLineIndex Mod 2 Then
      Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex - 1)
      nLine.StartPos.Y = oLine.StartPos.Y + 100
      nLine.EndPos.Y = oLine.EndPos.Y + 100
    Else
      Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex + 1)
      nLine.StartPos.Y = oLine.StartPos.Y - 100
      nLine.EndPos.Y = oLine.EndPos.Y - 100
    End If
    nLine.StartPos.X = oLine.StartPos.X
    nLine.EndPos.X = oLine.EndPos.X
    
    TChart1.Repaint
  End If
End Sub

Private Sub TChart1_OnDrawLineToolNewLine()
    Dim currentLineIndex As Integer
    TChart1.Tools.Items(0).asDrawLine.SelectNewLines = True
    currentLineIndex = TChart1.Tools.Items(0).asDrawLine.Selected
    
    Set oLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex)
    With oLine
        TChart1.Tools.Items(0).asDrawLine.AddLine .StartPos.X, .StartPos.Y - 100, .EndPos.X, .EndPos.Y - 100
    End With
    
    Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex + 1)
    With nLine
        .Pen.Color = oLine.Pen.Color
        .Pen.Style = oLine.Pen.Style
    End With
    
    oLine.Pen.Style = psNothing
    oLine.Pen.Style = psSolid
End Sub

If it works fine, you should do something similar to implement a rotation.

[guilz2010]

Hello Yeray,

Thanks for your answer, it's working pretty well

I have an issue now with the Axis Scroll tools with your code: when I try to move the bottom axis, a new line is drawn !
So I can't move the chart with the Axis Scroll tools...

How can I fix it ?

King Regards,

Guilz

[guilz2010]

The 2nd thing is I would like to move only 1 line when I press ctrl button.

How can I do that Yeray ?

Thank you

Guilz

[Yeray]

Hello Guilz,

The easiest would probably be to use the Key events to activate/deactivate the EnableDraw and EnableSelect properties:

Code: Select all

Dim oLine, nLine As IDrawLine

Private Sub Form_Load()
  TChart1.Aspect.View3D = False
  
  TChart1.AddSeries scLine
  TChart1.Series(0).FillSampleValues
  
  TChart1.Tools.Add tcDrawLine
  
  TChart1.Tools.Items(0).asDrawLine.EnableDraw = False
  TChart1.Tools.Items(0).asDrawLine.EnableSelect = False
End Sub

Private Sub TChart1_OnDrawLineToolLineDrag()
  Dim currentLineIndex As Integer
  currentLineIndex = TChart1.Tools.Items(0).asDrawLine.Selected
  If currentLineIndex > -1 Then
    Set oLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex)
    If currentLineIndex Mod 2 Then
      Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex - 1)
      nLine.StartPos.Y = oLine.StartPos.Y + 100
      nLine.EndPos.Y = oLine.EndPos.Y + 100
    Else
      Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex + 1)
      nLine.StartPos.Y = oLine.StartPos.Y - 100
      nLine.EndPos.Y = oLine.EndPos.Y - 100
    End If
    nLine.StartPos.X = oLine.StartPos.X
    nLine.EndPos.X = oLine.EndPos.X
    
    TChart1.Repaint
  End If
End Sub

Private Sub TChart1_OnDrawLineToolNewLine()
    Dim currentLineIndex As Integer
    TChart1.Tools.Items(0).asDrawLine.SelectNewLines = True
    currentLineIndex = TChart1.Tools.Items(0).asDrawLine.Selected
    
    Set oLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex)
    With oLine
        TChart1.Tools.Items(0).asDrawLine.AddLine .StartPos.X, .StartPos.Y - 100, .EndPos.X, .EndPos.Y - 100
    End With
    
    Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex + 1)
    With nLine
        .Pen.Color = oLine.Pen.Color
        .Pen.Style = oLine.Pen.Style
    End With
    
    oLine.Pen.Style = psNothing
    oLine.Pen.Style = psSolid
End Sub

Private Sub TChart1_OnKeyDown(ByVal KeyCode As Long, ByVal Shift As TeeChart.EShiftState)
  If KeyCode = KeyCodeConstants.vbKeyShift Then
    TChart1.Tools.Items(0).asDrawLine.EnableDraw = True
    TChart1.Cursor = -3
  End If
  If KeyCode = KeyCodeConstants.vbKeyControl Then
    TChart1.Tools.Items(0).asDrawLine.EnableSelect = True
  End If
End Sub

Private Sub TChart1_OnKeyUp(ByVal KeyCode As Long, ByVal Shift As TeeChart.EShiftState)
  If KeyCode = KeyCodeConstants.vbKeyShift Then
    TChart1.Tools.Items(0).asDrawLine.EnableDraw = False
    TChart1.Cursor = -2
  End If
  If KeyCode = KeyCodeConstants.vbKeyControl Then
    TChart1.Tools.Items(0).asDrawLine.EnableSelect = False
  End If
End Sub

[guilz2010]

Hi Yeray,

It's not good for me but it's probably beacause i'm not clear
My need: be able to select and move only 1 line when ctrl key is down only. In your code when i move 1 line the second one is moved too.
This need is to change the distance between 2 lines pressing ctrl key and moving 1 line...

line.png (36.55 KiB) Viewed 13423 times

Kind Regards Yeray

Guilz

[Yeray]

Hi Guilz,

Ok, Ctrl key to move up/down each line individually. Playing a little bit with the last code it could be possible:

Code: Select all

Dim oLine, nLine As IDrawLine

Private Sub Form_Load()
  TChart1.Aspect.View3D = False
  
  TChart1.AddSeries scLine
  TChart1.Series(0).FillSampleValues
  
  TChart1.Tools.Add tcDrawLine
  
  TChart1.Tools.Items(0).asDrawLine.EnableDraw = False
  TChart1.Tools.Items(0).asDrawLine.EnableSelect = False
End Sub

Private Sub TChart1_OnDrawLineToolLineDrag()
  ForceLine
End Sub

Private Sub TChart1_OnDrawLineToolNewLine()
    Dim currentLineIndex As Integer
    TChart1.Tools.Items(0).asDrawLine.SelectNewLines = True
    currentLineIndex = TChart1.Tools.Items(0).asDrawLine.Selected
    
    Set oLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex)
    With oLine
        TChart1.Tools.Items(0).asDrawLine.AddLine .StartPos.X, .StartPos.Y - 100, .EndPos.X, .EndPos.Y - 100
    End With
    
    Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex + 1)
    With nLine
        .Pen.Color = oLine.Pen.Color
        .Pen.Style = oLine.Pen.Style
    End With
    
    oLine.Pen.Style = psNothing
    oLine.Pen.Style = psSolid
End Sub

Private Sub TChart1_OnKeyDown(ByVal KeyCode As Long, ByVal Shift As TeeChart.EShiftState)
  If KeyCode = KeyCodeConstants.vbKeyShift Then
    TChart1.Tools.Items(0).asDrawLine.EnableDraw = True
    TChart1.Cursor = -3
  End If
  If KeyCode = KeyCodeConstants.vbKeyControl Then
    TChart1.Tools.Items(0).asDrawLine.EnableSelect = True
  End If
End Sub

Private Sub TChart1_OnKeyUp(ByVal KeyCode As Long, ByVal Shift As TeeChart.EShiftState)
  If KeyCode = KeyCodeConstants.vbKeyShift Then
    TChart1.Tools.Items(0).asDrawLine.EnableDraw = False
    TChart1.Cursor = -2
  End If
  If KeyCode = KeyCodeConstants.vbKeyControl Then
    TChart1.Tools.Items(0).asDrawLine.EnableSelect = False
  End If
End Sub

Private Sub TChart1_OnMouseMove(ByVal Shift As TeeChart.EShiftState, ByVal X As Long, ByVal Y As Long)
  ForceLine
End Sub

Private Sub ForceLine()
  Dim currentLineIndex As Integer
  currentLineIndex = TChart1.Tools.Items(0).asDrawLine.Selected
  If currentLineIndex > -1 Then
    Set oLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex)
    If currentLineIndex Mod 2 Then
      Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex - 1)
    Else
      Set nLine = TChart1.Tools.Items(0).asDrawLine.Lines.Items(currentLineIndex + 1)
    End If
    oLine.StartPos.X = nLine.StartPos.X
    oLine.EndPos.X = nLine.EndPos.X
    
    TChart1.Repaint
  End If
End Sub

The result isn't perfect. The dragged line is shown in it's temporal location and redrawn in its forced final location giving a flickering result.
I don't see how to avoid this easily. However, an option would probably be to hide the dragged line and use custom drawing techniques to draw the final location while dragging.

[guilz2010]

Hi Yeray,

Thank you to try to find a solution - I can't use your code because it is not working well for me (flickering, can't move the 2 lines at the same time when ctrl key is not pressed...)

Kind regards,

Guilz

[Narcís]

Hi Guilz,

I'm taking up on this and I may be missing something but what about doing something like this? When selecting a line you can either drag or modify it. My suggestion is simpler than what was discussed here. If it doesn't fit your needs please let me know what's missing.

Code: Select all

Private Sub Form_Load()
    TChart1.Aspect.View3D = False
    TChart1.AddSeries scLine
    TChart1.Series(0).FillSampleValues
    
    TChart1.Tools.Add tcDrawLine
    TChart1.Tools.Items(0).asDrawLine.EnableSelect = False
End Sub

Private Sub TChart1_OnKeyDown(ByVal KeyCode As Long, ByVal Shift As TeeChart.EShiftState)
    TChart1.Tools.Items(0).asDrawLine.EnableSelect = (Shift = ssCtrl)
End Sub

Private Sub TChart1_OnKeyUp(ByVal KeyCode As Long, ByVal Shift As TeeChart.EShiftState)
    TChart1.Tools.Items(0).asDrawLine.EnableSelect = False
End Sub

Thanks in advance.

[guilz2010]

Hi Narcis,

Thanks for your contribution but It does not respond to my need (be able, when I draw 1 line to draw a second line automaticaly and after, when I move 1 line the second line is moved too and third, when I press ctrl key and clic on 1 line, only this line is moved (to change the distance between line A and B)

Please try the code I made, it's working pretty well now...Perhaps we can optimize it...

Guilz

Code: Select all

    Dim oLine As IDrawLine
    Dim nLine As IDrawLine
    Dim CTRL_KEY_DOWN As Boolean
    
    Dim dicHeight As New Scripting.Dictionary
    
    Const DEFAULT_HEIGHT As Long = 100
    
    
    Private Sub Form_Load()
      TChart1.Aspect.View3D = False
     
      TChart1.AddSeries scLine
      TChart1.Series(0).FillSampleValues
     
      TChart1.Tools.Add tcDrawLine
    End Sub

    Private Sub TChart1_OnDrawLineToolLineDrag()
      Dim currentLineIndex As Integer
      
      currentLineIndex = TChart1.Tools.Items(1).asDrawLine.Selected
      
      If currentLineIndex > -1 Then
        Set oLine = TChart1.Tools.Items(1).asDrawLine.Lines.Items(currentLineIndex)
        
        If CTRL_KEY_DOWN = True Then
            Debug.Print ""
            ' Deplacement d'1 seule ligne
        
        Else
             Dim H As Long
             If dicHeight.Exists(currentLineIndex) Then
                H = dicHeight.Item(currentLineIndex)
             Else
                H = DEFAULT_HEIGHT
             End If
             ' Nouvelle ligne
             If currentLineIndex Mod 2 Then
               Set nLine = TChart1.Tools.Items(1).asDrawLine.Lines.Items(currentLineIndex - 1)
               nLine.StartPos.Y = oLine.StartPos.Y + H
               nLine.EndPos.Y = oLine.EndPos.Y + H
             Else
               Set nLine = TChart1.Tools.Items(1).asDrawLine.Lines.Items(currentLineIndex + 1)
               nLine.StartPos.Y = oLine.StartPos.Y - H
               nLine.EndPos.Y = oLine.EndPos.Y - H
             End If
             nLine.StartPos.X = oLine.StartPos.X
             nLine.EndPos.X = oLine.EndPos.X
             TChart1.Repaint

        
        End If
        
      End If
    End Sub

    Private Sub TChart1_OnDrawLineToolNewLine()
        Dim currentLineIndex As Integer
        Dim H As Long
        
        TChart1.Tools.Items(1).asDrawLine.SelectNewLines = True
        currentLineIndex = TChart1.Tools.Items(1).asDrawLine.Selected
       
        Set oLine = TChart1.Tools.Items(1).asDrawLine.Lines.Items(currentLineIndex)
        With oLine
            H = DEFAULT_HEIGHT
            TChart1.Tools.Items(1).asDrawLine.AddLine .StartPos.X, .StartPos.Y - H, .EndPos.X, .EndPos.Y - H
             
             If dicHeight.Exists(currentLineIndex) = False Then
                dicHeight.Add currentLineIndex, H
                dicHeight.Add currentLineIndex + 1, -H
             End If
        End With
       
        Set nLine = TChart1.Tools.Items(1).asDrawLine.Lines.Items(currentLineIndex + 1)
        With nLine
            .Pen.Color = oLine.Pen.Color
            .Pen.Style = oLine.Pen.Style
        End With
       
        oLine.Pen.Style = psNothing
        oLine.Pen.Style = psSolid
    End Sub

Private Sub TChart1_OnKeyDown(ByVal KeyCode As Long, ByVal Shift As TeeChart.EShiftState)
    Debug.Print "down " & KeyCode, Shift

    If KeyCode = 17 And Shift = 4 Then CTRL_KEY_DOWN = True
End Sub

Private Sub TChart1_OnKeyUp(ByVal KeyCode As Long, ByVal Shift As TeeChart.EShiftState)
    Debug.Print "up " & KeyCode, Shift
    If KeyCode = 17 And Shift = 0 Then
    
      Dim currentLineIndex As Integer
      
      currentLineIndex = TChart1.Tools.Items(1).asDrawLine.Selected
      
      If currentLineIndex > -1 Then
        Set oLine = TChart1.Tools.Items(1).asDrawLine.Lines.Items(currentLineIndex)
        
         Dim H As Long
         If currentLineIndex Mod 2 Then
           Set nLine = TChart1.Tools.Items(1).asDrawLine.Lines.Items(currentLineIndex - 1)
           
           H = nLine.EndPos.Y - oLine.EndPos.Y
         
            If dicHeight.Exists(currentLineIndex) Then
               dicHeight.Remove (currentLineIndex)
               dicHeight.Remove (currentLineIndex - 1)
               dicHeight.Add currentLineIndex, H
               dicHeight.Add currentLineIndex - 1, -H
            End If
         
         Else
           Set nLine = TChart1.Tools.Items(1).asDrawLine.Lines.Items(currentLineIndex + 1)
            H = oLine.EndPos.Y - nLine.EndPos.Y
         
            If dicHeight.Exists(currentLineIndex) Then
               dicHeight.Remove (currentLineIndex)
               dicHeight.Remove (currentLineIndex + 1)
               dicHeight.Add currentLineIndex, H
               dicHeight.Add currentLineIndex + 1, -H
            End If
         
         End If
         
      End If
    CTRL_KEY_DOWN = False

    End If
    
    
End Sub

[Yeray]

Hello Guilz,

So this is working as you would like, isn't it? If not, please, try to explain us what aspect would you exactly want to optimize.