wxGridTable how is the grid filled in

harryC has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks,
I was looking at https://github.com/jmlynesjr/wxPerl-Module-Examples/blob/master/wxGridTable.pl which is nearly the same as the example in wx::Demo.
I don't understand where the cells in de grid are filled in in this example. If i try to change a value in the cells (by adding a line Setvalue in de program) it says read only grid.
I can change the row and collumn names.
I would like to use this module but somehow i need to start with a empty grid and understand what is going on.
I googled around but i did not find any explenation how it works.
Can anyone help thks Harry

Comment on wxGridTable how is the grid filled in

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Re: wxGridTable how is the grid filled in by Anonymous Monk on May 19, 2014 at 01:21 UTC
I don't understand where the cells in de grid are filled in in this example Can you identify the gridtable object? They're all filled by the subclass `package MyGridTable;` This part `my $table = MyGridTable->new; # Virtual Table object $grid->SetTable( $table );` [download] What this means, is when $grid (a wxGrid) decides it needs to show the Nth-col/Nth-row item, it calls $table->GetValue(x,y) , and sub MyGridTable::GetValue returns what is going to be filled ... this is why its virtual Actually first it calls MyGridTable::CanGetValueAs() to decide whether to call MyGridTable::GetValueAsBool() for the checkboxes/checkbuttons, or MyGridTable::GetValueAsDouble() ... For the conceptual model see Wx::Perl::ListView/Wx::Perl::ListView::SimpleModel/https://metacpan.org/source/MBARBON/Wx-Perl-ListView-0.01/example/listview.pl http://wiki.wxperl.it/Wx::GridTableBase http://wiki.wxperl.it/Wx::Grid You should already have a copy of the wxwidgets manual ... because currently the online version of the docs is down :) http://docs.wxwidgets.org/trunk/search.php?query=wxGrid http://docs.wxwidgets.org/trunk/overview_grid.html http://docs.wxwidgets.org/trunk/classwx_grid.html I would like to use this module but somehow i need to start with a empty grid and understand what is going on. I googled around but i did not find any explenation how it works. The docs tie it together :) Read more... (824 Bytes)	[reply] [d/l] [select]
Re: wxGridTable how is the grid filled in by Anonymous Monk on May 19, 2014 at 01:23 UTC
I was looking at https://github.com/jmlynesjr/wxPerl-Module-Examples/blob/master/wxGridTable.pl Add this in the frame constructors, gets rid of the annoying popups `my $logwindow = Wx::LogWindow->new( $self , "title", !!"show" );` [download]	[reply] [d/l]