Does VC# have an event for DoubleClick?

[aewarnick]

If so, where is it? I cant find it.

 

[Divil]

Can you elaborate? Its difficult to know what you mean. All .NET controls have a DoubleClick event, regardless of what language you are using.

 

[aewarnick]

In the designer, when you click on the lightning bolt for Events there is usually a Click event but I never see a DoubleClick event.

I want to put DoubleClick events in my code (my program).

 

[Divil]

Which control in particular? I found it for a textbox, for example, under the Action heading in the property grid.

 

[aewarnick]

This page: It is not there on mine.

 

[DiverDan]

Try this:

Private Sub Your_Control_Name_Here_DoubleClick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Your_Control_Name_Here.DoubleClick
Do something special
End Sub

All Controls respond to double clicks.

btw: Divil, did you write the DotNetWidgets menu generator? If so you did a great job!

 

[aewarnick]

I pretty much knew how to do it but I would think that double clicks are common and VS would have them like the rest of the Events. But I guess not. If anyone knows where that event would be please let me know. Maybe I have a cheap version of MSVC#? I got it from office max for 100 bucks.

 

[Cywizz]

I agree, the control your using is the richtextbox control, and ive checked both vb and c# - no DoubleClick from list of events (thunderbolt icon in c# and dropdowns in code from vb)
It is, however available as a valid event via code. The help also doesnt show the event, but it does show that the control inherits from the Control class. (All Control objects have a doubleclick event)

Any comments? Is this maybe a bug or is there some reason around this?


EDIT: It might be in code but it doesnt work. Found a msdn artical about event sequence, confirming no double click event:

http://msdn.microsoft.com/library/d.../vbcon/html/vbconwindowsformsarchitecture.asp
Its just weird that its available in code (ide doesnt complain..)

 

[aewarnick]

What about right click events, how can I configure those, the menu and everything.

 

[Heiko]

Should be in the mouse down event args.

The menu - youll have to do that on your own

(snippet from my code)

class ParameterDrivenTextbox ...


    Private mMenuAlternativeUnits As ContextMenu
    Private mAlternativeUnits As DataTable

Public Function LoadAlternativeUnits() As Boolean

        Dim myBR As New BusinessRules.ParameterContainerBR()
        Dim aRow As DataRow
        Dim aMenuItem As MenuItem

        If Not Me.mMenuAlternativeUnits Is Nothing Then
            Me.mMenuAlternativeUnits = Nothing
        End If
        Me.mMenuAlternativeUnits = New ContextMenu()

        mAlternativeUnits = myBR.GetAlternativeUnits(me.GUID)

        If Not mAlternativeUnits Is Nothing Then

            If mAlternativeUnits.Rows.Count > 0 Then

                Build the  popup menu ...
                For Each aRow In mAlternativeUnits.Rows

                    aMenuItem = New MenuItem(Utility.ConvertToString(aRow("_AE_Bezeichnung")))
                    aMenuItem.RadioCheck = True
                    AddHandler aMenuItem.Click, AddressOf Me.UnitsMenu_Clicked
                    Me.mMenuAlternativeUnits.MenuItems.Add(aMenuItem)
                Next

                Return True
            Else
                Return False
            End If
        Else
            Return False
        End If
    End Function

    Private Sub UnitsMenu_Clicked(ByVal Sender As System.Object, ByVal e As System.EventArgs)

        Dim theMenuItem As MenuItem = CType(Sender, MenuItem)


    End Sub




    Private Sub btnUnit_MouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles btnUnit.MouseDown

        If (e.Button <> MouseButtons.Right) Then
            Exit Sub
        End If

        mMenuAlternativeUnits.Show(btnUnit, New System.Drawing.Point(e.X, e.Y))

    End Sub

end class

Sure - this adds code always adds the same handler to the menu items, yopu could also add the individually, one by one, not in a loop.

 

[Divil]

All controls have those events, because the base class has them. It is, however, possible that the inherited controls already have behaviour for those events and arent calling them at all. In which case, they cant get rid of the events themselves (inheritance doesnt let you do that) but they can hide the events from the property browser using attributes.

Bottom line - if the event doesnt show in the property browser, its probably for a good reason. But its still there, and you can always wire it up with code on the off-chance that it still works.

DiverDan: Yes I did write them, thanks for the praise Look out for a designable Outlook Bar there in the next day or two.

 

[aewarnick]

Could I also put the right click in the Click event and even right click event?

 

[Nerseus]

If you just want a context menu, set the ContextMenu property of the control. It will override any built-in windows context menu, such as a TextBoxs Copy/Cut/Paste - so youll have to add them manually if you want those menus plus your own.

If you want to do something special before showing the context menu, youll have to use the MouseDown event. If you want to trigger the menu in the Click event, youll need to manually keep track of which button was pressed in the MouseDown event (such as a bool variable bRightButtonDown) so that youll know about it in the Click event (which doesnt give you which buttons are down). There is no right click event

-Nerseus

 

[aewarnick]

Why does this not work?

ContextMenu C=new ContextMenu();
C=contextMenu1;
if(MouseButtons==MouseButtons.Right) C.Show();

When I put the . in after C nothing pops up, it is not recognized. Something is wrong.

 

[aewarnick]

Anyone know? I really want to use a Context menu in my program.