Re: [Gambas-user] Slow Gridview creation
good work ! 2009/3/27 Jesus Guardon jguar...@telefonica.net: Fabien Bodard escribió: simply the handle name is not good... you have named your gridview gv and not GridView1... it's an usual copypaste error ;-) Ha ha... it's my mistake. Finally I get it working, really really fast method. A lot of thanks for your help, I was mind-closed for a while! Here is the final class: Thanks again Jesús -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] Slow Gridview creation
No, you don't fill it, it fills itself :-) As soon as you change anything in the gridview (number of rows/columns for instance) or there is any event forcing it to rewrite its contents (the user switching screens or a .Refresh by your code), it jumps into the _Data event for every cell and reloads them. So you just have to keep the contents prepared for it in the array in the background as Fabien has shown: dim myarray[16000,16000] Here is where you store your data for each cell. As soon as you or your code gives the gridview a reason to start updating (in Fabien's example: Rows.Count and Columns.Count), it will jump into the _Data event and fetch its data for every cell from there: public sub gridview1_data(row as integer, column as integer) gridview1.data.text = myarray[row, column] end Hope it helps... Rolf Jesus Guardon schrieb: Thanks for reply, but still not clear... Your example only draws a grid with empty cells. I can't figure out how to fill the grid with a database result object, even with a simple array. Please, open my eyes!! :-(( Jesus Fabien Bodard escribió: in fact jesus , you don't feel the grid, the grid just call the visible cells content via the event. dim myarray[16000,16000] public sub _New() gridview1.Rows.Count = 16000 gridView1.Columns.Count = 16000 end public sub gridview1_data(row as integer, column as integer) gridview1.data.text = myarray[row, column] end so you don't make any change in the data in the gridview but in the array it self... it's a data/view model. a variable that store the datas and a widget that just walk on the content. 2009/3/26 Jesus Guardon jguar...@telefonica.net: Hi all I'm trying to implement the Data event handler, but I cannot understand the way it must be done. I am locked out, sorry for my awkwardness. Can anyone provide a basic working example? I need to fill a gridview with 16000+ rows. Thanks in advance! Jesús Benoit Minisini escribió: You must do exactly what is written in the documentation: instead of setting the data explicitely, you must implement the Data event handler. In this event handler, you will receive the Row and Column of the cell to fill, and in return you set the properties of the GridView.Data property to define the cell contents. PUBLIC SUB MyGridView_Data(Row AS Integer, Column AS Integer) MyGridView.Data.Text = Row : Column END -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] Slow Gridview creation
Still nothing... Data event seems to be not fired. Please, check the modified example: http://www.ea7dfh.es/demotableview.tar.gz This includes the sqlite3 database and is too big to attach in the e-mail.( ~600 Kb) What I'm doing wrong? Regards and thanks for your patience Jesús -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] Slow Gridview creation
simply the handle name is not good... you have named your gridview gv and not GridView1... it's an usual copypaste error ;-) PUBLIC SUB gv_Data(Row as integer, Column as integer) you have put the column between comma... this pactice is for the translated strings... but if you translate column headers ... they will not match with the db entries... i think it will be better to use a separate string array to store the fields name. private $aMyFields as string[]= [field1, field2, Field3, Field4] public sub _new() gv.columns.count = $aMyFields.count gv.columns[0].text = id gv.Columns[1].text = (name)' that can be nom in french etc... public sub gv_data(... result.moveto(row) gv.data.text=result[$aMyFields[column]] Regards, Fabien 2009/3/27 Jesus Guardon jguar...@telefonica.net: Still nothing... Data event seems to be not fired. Please, check the modified example: http://www.ea7dfh.es/demotableview.tar.gz This includes the sqlite3 database and is too big to attach in the e-mail.( ~600 Kb) What I'm doing wrong? Regards and thanks for your patience Jesús -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] Slow Gridview creation
Fabien Bodard escribió: simply the handle name is not good... you have named your gridview gv and not GridView1... it's an usual copypaste error ;-) Ha ha... it's my mistake. Finally I get it working, really really fast method. A lot of thanks for your help, I was mind-closed for a while! Here is the final class: Thanks again Jesús frmGridView.class Description: application/java-vm -- ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
[Gambas-user] Slow GridVIew creation
This is an excerpt from my program: visszhang = DBconX.Exec(quert) FOR EACH visszhang nev.Add(visszhang!FName) ut.Add(visszhang!FPath) nagy.Add(Round(visszhang!FSize / 1048576, -2)) mikor.Add(visszhang!FChanged) kotet.Add(point) NEXT dis = nev.Count gV.Rows.Count = dis FOR i = 0 TO dis - 1 gV[i, 0].Text = nev[i] gV[i, 1].Text = kotet[i] gV[i, 2].Text = ut[i] gV[i, 3].Text = nagy[i] gV[i, 4].Text = mikor[i] NEXT The problem is: I'm handling a database, and during the querries I need to operate with tens of thousands of five-columned rows. It is desperately slow creation. Is it possible to change the algorithm and make it faster? Currently I'm filling the rows from 5 previously created arrays. I need some help, thanks! -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] Slow Gridview creation
On mercredi 28 janvier 2009, M. Cs. wrote: Dear Benoit, I would like to know whether it is possible to make GridView creation and filling process faster. I'm using databases for storage, then I'm doing the querries, which are giving tens of thousand results, or tens of thousand rows with five columns each. First, I put the results into five separated arrays, and afterwards I'm using them with a FOR...NEXT cycle. This is the code I'm using: visszhang = DBconX.Exec(quert) FOR EACH visszhang nev.Add(visszhang!FName) ut.Add(visszhang!FPath) nagy.Add(Round(visszhang!FSize / 1048576, -2)) mikor.Add(visszhang!FChanged) kotet.Add(point) NEXT dis = nev.Count gV.Rows.Count = dis FOR i = 0 TO dis - 1 gV[i, 0].Text = nev[i] gV[i, 1].Text = kotet[i] gV[i, 2].Text = ut[i] gV[i, 3].Text = nagy[i] gV[i, 4].Text = mikor[i] NEXT But like this it takes eternity to create a table of 17.000 rows. There is a remark in Gambas documentation: * You should use the last methodfile:///usr/share/gambas2/help/help/def/method.htmlif you have thousands of rows to display. *What does it exactly mean? Can you recommend me a faster algorithm? Thanks! You must do exactly what is written in the documentation: instead of setting the data explicitely, you must implement the Data event handler. In this event handler, you will receive the Row and Column of the cell to fill, and in return you set the properties of the GridView.Data property to define the cell contents. PUBLIC SUB MyGridView_Data(Row AS Integer, Column AS Integer) MyGridView.Data.Text = Row : Column END -- Benoit Minisini -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
