[Gambas-user] Modify a control in another form

[Richard Terry]

Fabien Bodard wrote:
> 2012/9/23 richard <rterry at ...1823...>:
>   
>> On 23/09/12 08:44, richard wrote:
>>     
>>> On 23/09/12 08:31, Keith Clark wrote:
>>>       
>>>> On 12-09-22 06:23 PM, richard wrote:
>>>>         
>>>>> On 23/09/12 08:03, Keith Clark wrote:
>>>>>           
>>>>>> How do I modify settings of a control on another form?  Let's say that I
>>>>>> want to be able to control the number of rows and columns of a grid
>>>>>> view, gvSampleGrid, on form, fGameGrid from form, fGameSetup.
>>>>>>
>>>>>> Would it not be fGameGrid.gvSampleGrid.rows.count=10?
>>>>>>
>>>>>> I am working with the book A beginner's Guide to Gambas but find it
>>>>>> confusing on the basics.
>>>>>>
>>>>>> Thanks.
>>>>>> If you have set your projects options to make your controls public you
>>>>>> can address any control on anther form with the correct syntax
>>>>>>
>>>>>> What error message to you get when you run your code?
>>>>>>
>>>>>> richard
>>>>>>
>>>>>>
>>>>>>             
>>>> That is exactly what I didn't do!  Set the controls to public.  Done now
>>>> and it works fine.  Thanks!
>>>>
>>>> Keith
>>>>
>>>>
>>>>         
>>> Also remember you can pass anything from form to form even forms, or
>>> pass forms to code modules. Also you can declare a form
>>>
>>> For example if  you used alot of say columnviews all over a large
>>> project and did the same sort of thing to the columnview in all the
>>> forms, simple example, allow the user to change the font of a columnview
>>> and save it to a settings file via a pop-up menu over the columnview,
>>> you could have a general module in your project, and pass the columnview
>>> to that module, do whatever on it you wanted. Then you have a single few
>>> lines of code you re-use in dozens and dozens of situations.
>>>
>>> e.g I have a module I call modUtil and puts lots of stuff in it which is
>>> used all over the place
>>>
>>> Public Sub Columnview_SetFont(cvw As Columnview, Settings_Section As String)
>>> '----------------------------------------------------------------------------------------------------------------
>>>      'Attempts to change the font of a columnview and save to settings
>>> '---------------------------------------------------------------------------------------------------------------
>>>
>>>      Dialog.font = cvw.font
>>>      If Dialog.SelectFont() Then Return
>>>      cvw.font = Dialog.Font
>>>      Settings[Settings_Section & "/" & cvw.name & ".font"] =
>>> cvw.Font.ToString()
>>>
>>> End
>>>
>>>
>>>
>>>       
>> As an addendum you will have to in this case load your previously saved
>> font value from your settings file.
>> I always have  a Private sub Settings_Load() in each form and a Public
>> Sub Settings_Save()
>>
>> e.g
>>
>> Private sub Settings_Load()
>>
>>    Try cvwItemsBilled.Font =
>> Font[Settings["Billing_RecordVisit/cvwItemsBilled.font"]]
>>
>> end sub
>>
>> Note the Settings_Save is Public, as then, if I have multiple sub-forms
>> on another form which is closed, the the 'Parent' form can call all the
>> Settings_Save subroutines in all its embedded forms when it closes.
>>
>> Regards
>>
>> richard
>>
>>
>>
>>
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>>     
>
> I think the good way is this one :
>
> Never make your form public !!!
>
> Prefers that ... In the gridviewform :
>
>
> Public Function GetGrid() as GridView
>
> Return MyGridView
>
> End
>
>
>
> THen you can use that in another form to manage the grid :
>
>
> Form1.GetGrid().Rows.Count...
>
>
> Well if you just need to modify the number of row you can do that too
>
> In the gridview form :
>
> Public Sub SetGridRows(iCount as Integer)
>
>   MyGridView.Rows.Count = iCount
>
> End
>
>
> Setting Forms public have a cost in Time,Memory and make the code less clearer
>
>   
Fabian can you elaborate on that?

Apart from upgrading my rather poor coding skills, I'd be interested in 
just what the cost is in terms of time and memory.

Regards

Richard