Microsoft KB Archive/140348

= How to Indent Outline Items Without Using the Indent Property =

Article ID: 140348

Article Last Modified on 2/10/2000

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APPLIES TO


 * Microsoft Visual FoxPro 3.0 Standard Edition

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This article was previously published under Q140348



SUMMARY
This article provides a method that illustrates how to build an outline control and indent the elements in it without using the Indent property. The example code builds a list of program names displayed by extension.



MORE INFORMATION
The sample program included in this article uses two tables and an array. The first table (MSCodeType) stores file categories (extensions) such as .prg, .exe, or .app. The second table (MSCodeExamples) lists file names by category. The array has two dimensions; it records the program categories and the number of items with this category.

The Technique Used by the Code Sample
The code sample uses the following technique.

 Build a list of types. The code first builds the list of files from the MSCodeType table. It scans the MSCodeType table and places the elements in the outline control and in the laNumAdded array. Add an item. To add an item to the list, the code uses the AddItem method. Only one parameter, the string to add to the list, is passed to the Additem method. Because no index number is specified, the new item is added as a subordinate item, at the end of the list of subordinates for the element selected. The ListIndex property is called to select an item in the list before inserting a new item.  Select an item in the list. The sample code scans the MSCodeExamples table. It locates the program type in the array and increments the number of programs with this type. It also selects the parent of the item to insert. The ListIndex property is not absolute for an element; it varies as elements are inserted into the list, so it is necessary to calculate the position of the item in the list each time an element is added. The code loops from the current element in the array to the first element in the array, summing the number of files to estimate the position of the current element to select. The number of file categories (the parent in the outline control) is then summed to calculate the list position of the current element. For example, if you want to add a .prg type file name in the outline control, PRG is stored in the third row in the array, so the array appears as follows:   Row   Program_type  Number_of_Files ---  1       EXE             2 2      HLP             3 3      PRG             4 The Outline looks like this:        EXE Exe1 Exe2 Exe3 HLP Hlp1 Hlp2 Hlp3 PRG Prg1 Prg2 Prg3 The item to select is the PRG category type. The ListIndex of the item to select is:      3+ 2 = 5 (go through the array in descending order, and calculate the               number of files above).

5+ 3-1 = 7 (adds the number of categories). 

Code Sample
Follow the step-by-step procedure to run this program

  Create the data. Copy and paste the following code in a program to create a database and two tables. CLOSE ALL CREATE DATABASE mscodedbc

CREATE TABLE MSCODETYPE (code_description C(3)) && Adds table to mydbc1 INSERT INTO mscodetype values ('PRG') INSERT INTO mscodetype values ('HLP') INSERT INTO mscodetype values ('APP') CREATE TABLE MSCodeExamples (program_type C(3), Program_name M)  INSERT INTO mscodeExamples VALUES ('PRG', 'prgProgram1') INSERT INTO mscodeExamples VALUES ('APP', 'appTest1') INSERT INTO mscodeExamples VALUES ('HLP','hlpHelp1') INSERT INTO msCodeExamples VALUES ('PRG', 'prgProgram2') INSERT INTO msCodeExamples VALUES ('HLP','hlpHelp2') </li> Create a form.</li> Open the data environment of the form, and add the MSCodeType and the MSCodeexamples tables to the Data Environment.</li> Select the OleContainer from the Form Controls toolbar. Click Select control, then click Outline Control. An outline control is placed on the form.</li>  Copy the following code and paste it into the Init event of the outline control. SELECT MSCodeType DIMENSION laNumAdded(RECCOUNT,2)

SCAN * Build the code types- the first indent of the outline This.AddItem(MSCodeType.Code_Description) laNumAdded(RECNO,1) = 0 laNumAdded(RECNO,2) = MSCodeType.Code_Description ENDSCAN * The table that contains file names SELECT MSCodeExamples SCAN nIsTypeInArray=ASCAN(lanumadded,MSCodeExamples.Program_type) nRow=ASUBSCRIPT(lanumadded,nIsTypeInArray,1) * Find the position of the category in the array laNumAdded(nRow,1) =laNumAdded(nrow,1) + 1 This.ListIndex = 0 && No item selected * Loop through the array FOR I = nrow-1 TO 1 STEP - 1 IF MSCodeExamples.Program_Type=lanumadded(1,2) *aNumAdded(MSCodeExamples.Program_Type,2) = 0 This.ListIndex = 0 EXIT ELSE * Increment the index This.ListIndex = This.ListIndex + laNumAdded(i,1)

ENDIF ENDFOR * Add the number of file categories to the ListIndex This.ListIndex = This.ListIndex +nrow-1

lcProgram_Name = MLINE(MSCodeExamples.Program_Name,1) * Add the item to the outline. It is added to the end of the subitems of  * the item currently selected. This.AddItem(lcProgram_Name) This.PictureType(This.ListIndex + ;       laNumAdded(MSCodeExamples.Program_Type,1)) = 2 ENDSCAN

This.ListIndex = 0 This.Parent.ReFresh </li></ol>

Additional query words: VFoxWin OCX

Keywords: kbcode KB140348

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