asked on

ListView Tooltip

Hi

I'm looking forward to placing a tooltip in a listview.

In order to do that, I'm hanging to the listview's MouseMove event

and my handler looks like

private void OnListViewMouseMove(object sender, MouseEventArgs e)
{
      ListViewItem lvitem = new ListViewItem();
      lvitem = listView.GetItemAt(e.X,e.Y);

      if( lvitem != null )
            toolTip.SetToolTip( listView, "My tooltip" );
}

This shows a tooltip whose text is "My Tooltip".

Now what I want to do is to show a different text for each column.....

This would be if the mouse is over column 1, then the tooltip should be for instance "Over Column 1", if the mouse is over column 2, then the tooltip should be for instance "Over Column 2"

Any idea how to know which column I'm over (As you can see from the code, I can get the listViewItem I'm over, but don't know how to get the column I'm over)

Thanks

Tincho

Brian Mulder

there is a sample project here with a way to achieve something similar
http://www.codeproject.com/cs/miscctrl/CSharpHitTest.asp

but i'm just listening in on this q needing the same ;)

esteban_felipe

You may use the data of the Item that raised the event. If you wanted to use the index in the tooltip:

tooTip.SetToolTip(listView,listView.Index.ToString());

tinchos

ASKER

bruintje

Give me some time to check it out....

esteban_felipe

What I want to know is over which column I'm over

harris_c

This might help. Stripped it from other implementation --> shows dropdown box when user clicks on a cell. Same case though... Try it out + your code

Private col As Integer
Private row As Integer

Private Const colH As Byte = 85
Private Const colHH As Byte = 170

Private Sub lvwSQLConditions_MouseHover(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles lvwSQLConditions.MouseHover

row = e.Y - lvwSQLConditions.Items(0).GetBounds(ItemBoundsPortion.Label).Top
row \= lvwSQLConditions.Items(0).GetBounds(ItemBoundsPortion.Label).Height

col = e.X - lvwSQLConditions.Items(0).GetBounds(ItemBoundsPortion.Label).Left
col \= colH

'hideShowCombo(False)

Select Case col
Case 0, 1
col = 0
'show tooltip
Case 2
col = 1
'show tooltip
Case 3, 4
col = 2
Case 5
col = 3

End Select

lvwSQLConditions.Items(row).Selected = False

If col = 6 Then Exit Sub

Try
If row <> 0 Then
'check if we are allowed here
'If lvwSQLConditions.Items(row - 1).SubItems(3).Text = "" Then
'hideShowCombo(False)
'Exit Sub
'End If
End If
Catch ex As ArgumentOutOfRangeException
'hideShowCombo(False)
End Try
End Sub

hec",)

tinchos

ASKER

Sorry harris

could you please give me a hand in understanding it?

Tincho

harris_c

'This is the complete implementation.
'TODO: Put a timer on top so there is a delay on the tooltip display. Reason for putting the row/column variables outside the procedure.

Public Class Form1
Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

Public Sub New()
MyBase.New()

'This call is required by the Windows Form Designer.
InitializeComponent()

'Add any initialization after the InitializeComponent() call

End Sub

'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents ListView1 As System.Windows.Forms.ListView
Friend WithEvents ColumnHeader1 As System.Windows.Forms.ColumnHeader
Friend WithEvents ColumnHeader2 As System.Windows.Forms.ColumnHeader
Friend WithEvents ColumnHeader3 As System.Windows.Forms.ColumnHeader
Friend WithEvents ColumnHeader4 As System.Windows.Forms.ColumnHeader
Friend WithEvents ToolTip1 As System.Windows.Forms.ToolTip
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.components = New System.ComponentModel.Container()
Dim ListViewItem1 As System.Windows.Forms.ListViewItem = New System.Windows.Forms.ListViewItem(New System.Windows.Forms.ListViewItem.ListViewSubItem() {New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col1Row1", System.Drawing.SystemColors.WindowText, System.Drawing.SystemColors.Window, New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col2Row1"), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col3Row1"), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col4Row1")}, -1)
Dim ListViewItem2 As System.Windows.Forms.ListViewItem = New System.Windows.Forms.ListViewItem(New System.Windows.Forms.ListViewItem.ListViewSubItem() {New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col1Row2", System.Drawing.SystemColors.WindowText, System.Drawing.SystemColors.Window, New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col2Row2"), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col3Row2"), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col4Row2")}, -1)
Dim ListViewItem3 As System.Windows.Forms.ListViewItem = New System.Windows.Forms.ListViewItem(New System.Windows.Forms.ListViewItem.ListViewSubItem() {New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col1Row3", System.Drawing.SystemColors.WindowText, System.Drawing.SystemColors.Window, New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col2Row3"), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col3Row3"), New System.Windows.Forms.ListViewItem.ListViewSubItem(Nothing, "Col4Row3")}, -1)
Me.ListView1 = New System.Windows.Forms.ListView()
Me.ColumnHeader1 = New System.Windows.Forms.ColumnHeader()
Me.ColumnHeader2 = New System.Windows.Forms.ColumnHeader()
Me.ColumnHeader3 = New System.Windows.Forms.ColumnHeader()
Me.ColumnHeader4 = New System.Windows.Forms.ColumnHeader()
Me.ToolTip1 = New System.Windows.Forms.ToolTip(Me.components)
Me.SuspendLayout()
'
'ListView1
'
Me.ListView1.Columns.AddRange(New System.Windows.Forms.ColumnHeader() {Me.ColumnHeader1, Me.ColumnHeader2, Me.ColumnHeader3, Me.ColumnHeader4})
Me.ListView1.GridLines = True
Me.ListView1.Items.AddRange(New System.Windows.Forms.ListViewItem() {ListViewItem1, ListViewItem2, ListViewItem3})
Me.ListView1.Location = New System.Drawing.Point(40, 24)
Me.ListView1.Name = "ListView1"
Me.ListView1.Size = New System.Drawing.Size(312, 120)
Me.ListView1.TabIndex = 1
Me.ListView1.View = System.Windows.Forms.View.Details
'
'ColumnHeader1
'
Me.ColumnHeader1.Text = "Col1"
Me.ColumnHeader1.Width = 68
'
'ColumnHeader2
'
Me.ColumnHeader2.Text = "Col2"
Me.ColumnHeader2.Width = 74
'
'ColumnHeader3
'
Me.ColumnHeader3.Text = "Col3"
Me.ColumnHeader3.Width = 74
'
'ColumnHeader4
'
Me.ColumnHeader4.Text = "Col4"
Me.ColumnHeader4.Width = 78
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(400, 261)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.ListView1})
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)

End Sub

#End Region

Private col As Integer
Private row As Integer

'this is the default height of the cell
Private Const colH As Byte = 85

Private Sub ListView1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListView1.MouseMove
row = e.Y - ListView1.Items(0).GetBounds(ItemBoundsPortion.Label).Top
row \= ListView1.Items(0).GetBounds(ItemBoundsPortion.Label).Height

col = e.X - ListView1.Items(0).GetBounds(ItemBoundsPortion.Label).Left
col \= colH

'hideShowCombo(False)

ToolTip1.SetToolTip(ListView1, "You are in COLUMN: " & col + 1 & ", ROW: " & row + 1)
End Sub

Private Sub ListView1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListView1.SelectedIndexChanged

End Sub
End Class

hec",)

tinchos

ASKER

Sorry harris

could you please give me a hand in understanding it?
especially the ListView1_MouseMove method

Tincho

ASKER CERTIFIED SOLUTION

harris_c

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tinchos

ASKER

Ok hec

Just a question

When determining the column in which the cursor is positioned, you'll do

//determine *true* column regardless of column widths
//add up all column widths until its greater than the X location of cursor
for (col = 0; col <= colCnt - 1; col++)
{
tWidth = tWidth + listView1.Columns[col].Width;
if (tWidth > e.X)
{
outCol = false;
break;
}
}

But..... if I have defined the width of the column as -1 (autoadjust to the largest value in that column) or -2 (autoadjust to the header width), will it work too?

Tincho

harris_c

Hi Tincho,

It does. Since the calculation of the width is taking into account the current width of the listView.

You can verify this by putting a command button into the form and adding the ff code:

            private void button1_Click(object sender, System.EventArgs e)
            {
                  for (int ctr = 0; ctr < listView1.Columns.Count ; ctr++)
                  {
                        listView1.Columns[ctr].Width += 10;
                  }
            }

hec",)

tinchos

ASKER

Ok, let me check it and I'll let you know

Tincho

tinchos

ASKER

Harris, I have not forgotten about this one

I'm with a lot of trouble and I just couldn't try it.......

give me a few days and I'll be closing it

Thanks

Tincho

tinchos

ASKER

Sorry for the delay Harris, but I've been really busy and with a lot of trouble at work

Luckily, I've managed to test it today.

Thanks

Tincho

harris_c

Thats alright tinchos.

Thanks too.

hec",)