Q85109: VB3 How to Edit Grid Cells in VB Using Overlapped Text Box
Article: Q85109
Product(s): Microsoft Visual Basic for Windows
Version(s): 3.0
Operating System(s):
Keyword(s): kbcode
Last Modified: 04-MAY-2001
-------------------------------------------------------------------------------
The information in this article applies to:
- Microsoft Visual Basic Standard Edition for Windows, version 3.0
-------------------------------------------------------------------------------
SUMMARY
=======
The Grid custom control does not provide any text editing capability. The
example program below shows how you can use a text box to perform text editing
in the current cell of a grid.
MORE INFORMATION
================
The example program shown below enables you to edit the contents of a grid cell.
When you press a key, the grid moves a text box to the position of the current
cell and sets the focus to the text box. When you press the ENTER key or change
focus away from the current cell, the program transfers the text in the text box
back to the grid.
Steps to Create Example Program
-------------------------------
1. Start Visual Basic or from the File menu, choose New Project (ALT, F, N) if
Visual Basic is already running. Form1 is created by default.
2. From the File menu, choose Add File. Then select the GRID.VBX file. The Grid
tool appears in the Toolbox.
3. Place a grid (Grid1) and a text box (Text1) on Form1. Set the Grid1 Cols and
Rows properties both to 4. Then size the grid to show all the cells. Set the
Text1 BorderStyle property to None (0) and the Visible property to False (0).
4. Enter the following declarations in the general Declarations section:
Const ASC_ENTER = 13 ' ASCII code of ENTER key.
Dim gRow As Integer
Dim gCol As Integer
5. Enter the following code in the Grid1_KeyPress procedure:
Sub Grid1_KeyPress (KeyAscii As Integer)
' Move the text box to the current grid cell:
Call grid_text_move(Grid1, Text1)
' Save the position of the grids Row and Col for later:
gRow = Grid1.Row
gCol = Grid1.Col
' Make text box same size as current grid cell:
Text1.Width = Grid1.ColWidth(Grid1.Col) - 2 * Screen.TwipsPerPixelX
Text1.Height = Grid1.RowHeight(Grid1.Row) - 2 * Screen.TwipsPerPixelY
' Transfer the grid cell text:
Text1.Text = Grid1.Text
' Show the text box:
Text1.Visible = True
Text1.ZOrder 0
Text1.SetFocus
' Redirect this KeyPress event to the text box:
If KeyAscii <> ASC_ENTER Then
SendKeys Chr$(KeyAscii)
End If
End Sub
6. Add the following code to the Text1_KeyPress procedure:
Sub Text1_KeyPress (KeyAscii As Integer)
If KeyAscii = ASC_ENTER Then
Grid1.SetFocus ' Set focus back to grid, see Text_LostFocus.
KeyAscii = 0 ' Ignore this KeyPress.
End If
End Sub
7. Add the following code to the Text1_LostFocus procedure:
Sub Text1_LostFocus ()
Dim tmpRow As Integer
Dim tmpCol As Integer
' Save current settings of Grid Row and col. This is needed only if
' the focus is set somewhere else in the Grid.
tmpRow = Grid1.Row
tmpCol = Grid1.Col
' Set Row and Col back to what they were before Text1_LostFocus:
Grid1.Row = gRow
Grid1.Col = gCol
Grid1.Text = Text1.Text ' Transfer text back to grid.
Text1.SelStart = 0 ' Return caret to beginning.
Text1.Visible = False ' Disable text box.
' Return row and Col contents:
Grid1.Row = tmpRow
Grid1.Col = tmpCol
End Sub
8. In the general Declarations section or in a separate .BAS file, add the
following Sub routine:
Sub grid_text_move (Grid As Control, TextBox As Control)
' Move a text box to the position of the current cell in a grid:
Dim X As Single ' x position of current grid cell.
Dim Y As Single ' y position of current grid cell.
Dim i As Integer ' Column/row index.
' Skip grid border:
X = Grid.Left
Y = Grid.Top
If Grid.BorderStyle = 1 Then
X = X + Screen.TwipsPerPixelX
Y = Y + Screen.TwipsPerPixelY
End If
' Skip fixed columns and rows:
For i = 0 To Grid.FixedCols - 1
X = X + Grid.ColWidth(i)
If Grid.GridLines Then
X = X + Screen.TwipsPerPixelX
End If
Next
For i = 0 To Grid.FixedRows - 1
Y = Y + Grid.RowHeight(i)
If Grid.GridLines Then
Y = Y + Screen.TwipsPerPixelY
End If
Next
' Find current data cell:
For i = Grid.LeftCol To Grid.Col - 1
X = X + Grid.ColWidth(i)
If Grid.GridLines Then
X = X + Screen.TwipsPerPixelX
End If
Next
For i = Grid.TopRow To Grid.Row - 1
Y = Y + Grid.RowHeight(i)
If Grid.GridLines Then
Y = Y + Screen.TwipsPerPixelY
End If
Next
' Move the Text Box, and make small adjustments:
TextBox.Move X + Screen.TwipsPerPixelX, Y + Screen.TwipsPerPixelY
End Sub
9. Press the F5 key to run the program. Press a key to begin entering text into
a cell. Type in some text. Press the ENTER key to finish editing the cell.
Use the arrow keys to move to another cell. You can press the ENTER key to
begin editing a cell without changing the contents of the cell.
Additional query words: 3.00
======================================================================
Keywords : kbcode
Technology : kbVBSearch kbAudDeveloper kbVB300Search kbVB300
Version : :3.0
=============================================================================
THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.
Copyright Microsoft Corporation 1986-2002.