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Combobox class with column headers
Dorin Vasilescu, ALL Trans Romania
The combobox class is based on native VFP combobox class (not a container + command button), but the DropDown() event will activate a special always on top form with a grid on it to simulate combo drop down list, instead the VFP generated list. The .ColumnCount, .BoundColumn, .ColumnWidths properties are also available. Incremental searching capabilities with the search string memorized
Créé le
Il y a 19 années
Téléchargements
6454
Type de fichier
Freeware
Résultat de votes
5.00/5.00
General information
URL:
http://dorinvas.googlepages.com/SpecialCombo.zip
Résultat de votes:
5.00/5.00 (4 rates) Évaluer cet item
Description
UPDATE 2006-08-31: Remote asyncronous search sample on SQLite database Grid sample _INCSEEK value is used to start search only after user stop typing Various minor changes in code. Run test_cbsearch.scx form for a working sample The class .SearchMode property will set combobox behaviour: FILTER : searches in .SourceAlias are made using SET FILTER TO and .LocateExpr property where '%' is a placeholder for string typed in textbox area of combobox ( .SearchString property) If .LocateExpr = [UPPER(first_name) = UPPER('%')] then the filter command will be SET FILTER TO UPPER(first_name) = UPPER('typed_search_string') LOCATE: the same as FILTER, but use a locate command instead SET FILTER SETKEY : Replace % from .SeekExpr with typed string and apply the SET KEY command SEEK: Replace % from .SeekExpr with typed string and SEEK the expression SCRIPT : Executes an external procedure that generates the rows needed. The same, the % from .ScriptExpr property will be replaced with the actual search string typed in and the results are displayed in combobox list. The procedure can start rows retrieving only after few chars typed, to avoid unnecessary big lists. Update 2005-02-21 : -Added timer to detect if mouse is on another window titlebar + click (Deactivate doesn't fire) -Added refreshScriptExpr property, evaluated in Refresh(). It must return the stringfor DisplayValue. The .SourceAlias cursor doesn't need to have data to search in at Init(). -IncrementalSearch is used to determine if the search will be performed only when an attempt to leave the control is encountered Any feedback appreciated
Créé par
Dorin Vasilescu, ALL Trans Romania

Commentaires
Please uncomment the line from ComboForm::Deactivate class if has a comment marker, was for debugging purposes. Dorin Vasilescu, May 28, 2004

Excellent vcx, congratulations Thomas Cornau, May 29, 2004

This is a great tool well designed. Thank you for sharing it with us. Sony Joseph, December 27, 2004

How to add it in Grid. Anand Tank, March 12, 2005

I given up to try adding to a grid after many C5 errors. Anyway, there exists a trick to make it like being "inside" grid, easy to implement. I'll post an updated zip with "grid enabled" search combo implemented. Dorin Vasilescu, March 13, 2005

Nice work Dorin, however, I have two issues with it. 1) Sometimes the underlying grid form will only flash and not stay visible. 2) I cannot use the mouse wheel to change the values. These "issues" were observed in your demo form. Thanks for sharing this cool control. Mike Sue-Ping, September 8, 2006

Thanks for your feedback. 1.I don't know :)-yet , 2.I'll change it to respond to MouseWheel events. Dorin Vasilescu, September 9, 2006

Nice work Dorin. Still the same problem. When running this form modal with an Active-x control, all active-x controls on the screen "freeze" after the popup is displayed. Was hoping that this problem was corrected. Try it with MS Chart or any other Active-x. James Campisi, December 26, 2006

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