Tab Questions

[codenewbie]

A) I would like to prevent the user from closing the last remaining tab in my program.
So, I need to check to see what the total number of open tabs are - if the open tabs > 1, then close the selected tab - else if the open tabs = 1, then do nothing.
I'm not exactly sure how to go about doing this. - specifically the checking of the currently opened tabs.

B) When the user opens a new tab, they remain on their current tab. I dont like that. How can I make the new tab automatically selected once created?

C) I would like to close a tab by right clicking it - that was easy to do on a selected tab, but how can I do this to an unselected tab without actually selecting/opening that tab.
I want to be able to have one tab open, and right click/close any of the available tabs without leaving my current tab. Any thoughts here?

Any help would be greatly appreciated!
Thank you for your time!

[dday9]

As for A)

        If TabControl1.TabCount > 1 Then
            TabControl1.Controls.RemoveAt(TabControl1.Controls.Count - 1)
        End If

As for B)

        Dim tp As New TabPage
        tp.Text = "Tabpage" & TabControl1.Controls.Count + 1

        TabControl1.Controls.Add(tp)


        TabControl1.SelectedTab = tp

As for C, I'm not to sure. But I hope I gave you a jumpstart.

[.paul.]

A + B + C:

Public Class Form1

    Private WithEvents cms As New ContextMenuStrip
    Dim tabPageIndex As Integer = Nothing

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        cms.Items.Add("Remove Tab", Nothing, AddressOf clicked)
        TabControl1.ContextMenuStrip = cms
    End Sub

    Private Sub clicked(ByVal sender As System.Object, ByVal e As System.EventArgs)
        If Not tabPageIndex = -1 Then
            Dim currentIndex As Integer = TabControl1.SelectedIndex
            TabControl1.Controls.RemoveAt(tabPageIndex)
            If currentIndex < tabPageIndex Then
                TabControl1.SelectedIndex = currentIndex
            ElseIf currentIndex > tabPageIndex Then
                TabControl1.SelectedIndex = currentIndex - 1
            Else
                If currentIndex < TabControl1.TabCount Then
                    TabControl1.SelectedIndex = currentIndex
                Else
                    TabControl1.SelectedIndex = 0
                End If
            End If
        End If
    End Sub

    Private Sub TabControl1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TabControl1.MouseDown
        If e.Button = Windows.Forms.MouseButtons.Right Then
            If TabControl1.TabCount > 1 Then
                tabPageIndex = Enumerable.Range(0, TabControl1.TabCount).Where(Function(x) TabControl1.GetTabRect(x).Contains(e.Location)).FirstOrDefault
            Else
                tabPageIndex = -1
            End If
        Else
            tabPageIndex = -1
        End If
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim tp As New TabPage
        tp.Text = "Tabpage" & TabControl1.TabCount + 1
        TabControl1.TabPages.Add(tp)
        TabControl1.SelectedTab = tp
    End Sub

End Class

[codenewbie]

dday9 - Thank you for taking the time to reply to my post!

Your first line of code worked perfectly - thank you so much for the help here.

Your second line of code worked, as far as auto selecting the newly created tab, however it broke some of the remove tab functionality.

I have the remove tab function set to a double click - so when the user clicks on a tab it is highlighted, and if its double clicked it gets deleted.
Well, since adding your code, when you are on a tab and want to delete another, it highlights that tab and deletes the one you were just on (instead of simply leaving you on the page you were on, and deleting the tab you are ready to get rid of).

Any idea on how to incorporate both functions?
(I hope my description made sense - havent had coffee yet)

[codenewbie]

Alright - so I took dday9's code and .paul.'s code and combined them - solving A, B and C.
Thank you very much for your help!
dday9.vbforumRatings += 1
paul.vbForumRatings += 1

[codenewbie]

D) I noticed one bug that I would like to fix. If you create a new tab, and decide that you didnt want to do that and want to go back to the previous tab, right clicking the currently selected tab doesnt close that tab.
It ends up closing the previous tab and leaves the new tab open. Any thoughts?

[dday9]

D) I noticed one bug that I would like to fix. If you create a new tab, and decide that you didnt want to do that and want to go back to the previous tab, right clicking the currently selected tab doesnt close that tab.
It ends up closing the previous tab and leaves the new tab open. Any thoughts?

How are you removing the tab?

[codenewbie]

Confusing - I know.

Scenario-
So, imagine running the program, where it opens up to a screen that is displaying a single tab, we'll call it "Dashboard".
The user decided to create another tab, the "Settings" tab (remember: the program automatically takes you to the newly created "Settings" tab upon creation).
Once this happens, the user decides that they really didnt want to create that tab in the first place, so they close it (remember: right clicking on any tab closes that tab).

What I would like to happen:
The user decides to close the currently selected tab ("Settings") by right clicking it.
The tab closes, and forces the user back to the previously selected tab (in this case, the "Dashboard").

What actually happens:
The user decides to close the currently Selected tab ("Settings") by right clicking it.
The "Dashboard" tab is closed, leaving the user on the "Settings" tab.


Hopefully that clears up what I'm trying to accomplish a bit.

[.paul.]

we need to see your exact code again.

[codenewbie]

Here is my code for right clicking on a tab to delete it.

 Private Sub TabControlBox_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TabControlBox.MouseDown
        If e.Button = Windows.Forms.MouseButtons.Right Then
            If Not TabPageIndex = -1 Then
                Dim CurrentIndex As Integer = TabControlBox.SelectedIndex
                TabControlBox.Controls.RemoveAt(TabPageIndex)
                If CurrentIndex < TabPageIndex Then
                    TabControlBox.SelectedIndex = CurrentIndex
                ElseIf CurrentIndex > TabPageIndex Then
                    TabControlBox.SelectedIndex = CurrentIndex - 1
                Else
                    If CurrentIndex < TabControlBox.TabCount Then
                        TabControlBox.SelectedIndex = CurrentIndex
                    Else
                        TabControlBox.SelectedIndex = 0
                    End If
                End If
            End If
        End If

    End Sub

[.paul.]

where do you set tabPageIndex? it never changes in your code + also your code doesn't prevent removing the last tabpage

[codenewbie]

As stated, this code was just for closing the tab - not the other functions, as I didnt think those mattered to the problem

[codenewbie]

Here is the full code.
updated to prevent the user from closing the last tab.

    Private Sub MainWindow_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim Tp As New TabPage
        Dim NewTab As New Tab
        NewTab.Show()
        NewTab.TopLevel = False
        NewTab.Dock = DockStyle.Fill
        Tp.Controls.Add(NewTab)
        TabControlBox.TabPages.Add(Tp)
    End Sub

    Private Sub MainWindow_MouseDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDoubleClick
        Dim Tp As New TabPage
        Dim NewTab As New Tab
        NewTab.Show()
        NewTab.TopLevel = False
        NewTab.Dock = DockStyle.Fill
        Tp.Controls.Add(NewTab)
        TabControlBox.TabPages.Add(Tp)
        TabControlBox.SelectedTab = Tp
    End Sub

    Private Sub TabControlBox_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TabControlBox.MouseDown
        If e.Button = Windows.Forms.MouseButtons.Right Then
            If TabControlBox.TabCount > 1 Then
                If Not TabPageIndex = -1 Then
                    Dim CurrentIndex As Integer = TabControlBox.SelectedIndex
                    TabControlBox.Controls.RemoveAt(TabPageIndex)
                    If CurrentIndex < TabPageIndex Then
                        TabControlBox.SelectedIndex = CurrentIndex
                    ElseIf CurrentIndex > TabPageIndex Then
                        TabControlBox.SelectedIndex = CurrentIndex - 1
                    Else
                        If CurrentIndex < TabControlBox.TabCount Then
                            TabControlBox.SelectedIndex = CurrentIndex
                        Else
                            TabControlBox.SelectedIndex = 0
                        End If
                    End If
                End If
            End If
        End If
    End Sub

End Class

[.paul.]

TabPageIndex will always equal 0, therefore:

TabControlBox.Controls.RemoveAt(TabPageIndex)

is always equal to:

TabControlBox.Controls.RemoveAt(0)

[codenewbie]

Thank you for the tip!
I changed out the code, but didnt notice any difference when running the program

Right click still closes the incorrect tab when trying to close the selected tab.

[.paul.]

Private Sub TabControlBox_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TabControlBox.MouseDown
    If e.Button = Windows.Forms.MouseButtons.Right Then
        If TabControlBox.TabCount > 1 Then
            tabPageIndex = Enumerable.Range(0, TabControl1.TabCount).Where(Function(x) TabControl1.GetTabRect(x).Contains(e.Location)).FirstOrDefault
            If Not TabPageIndex = -1 Then
                Dim CurrentIndex As Integer = TabControlBox.SelectedIndex
                TabControlBox.Controls.RemoveAt(TabPageIndex)
                If CurrentIndex < TabPageIndex Then
                    TabControlBox.SelectedIndex = CurrentIndex
                ElseIf CurrentIndex > TabPageIndex Then
                    TabControlBox.SelectedIndex = CurrentIndex - 1
                Else
                    If CurrentIndex < TabControlBox.TabCount Then
                        TabControlBox.SelectedIndex = CurrentIndex
                    Else
                        TabControlBox.SelectedIndex = 0
                    End If
                End If
            End If
        End If
    End If
End Sub

[codenewbie]

.paul. - thank you for your help - your code worked perfectly.

If you have a free minute, may I ask what this line of code is doing, I dont understand what is happening here.

TabPageIndex = Enumerable.Range(0, TabControlBox.TabCount).Where(Function(x) TabControlBox.GetTabRect(x).Contains(e.Location)).FirstOrDefault

[.paul.]

it returns the index of the tabpage that you clicked on