how to test if a selected index has just been change ?

[Pascal]

Hello
This is, below, a piece of code that I have a problem with:

In the program (french description here
http://www.scalpa.info/carre_install...aide_carre.htm) a number is
generated in the interval given by the value of nudNumMin and nudNumMax.
In the user interface can be created several "projects" appearing in a
listbox, which each have their
characteristics . By clicking on the project in the listbox, controls must
display values for this project( selected at the moment it was build).
If in a project carréA nudNumMax is 20 and nudNumMin is 15 and
in the project carréB nudNumMax is 10 and nudNumMin is 5: When I pass from
one to the other that triggers the warning message and corrects my data
while it should not because min is much lower than max within the same
Project ...

So where and How can I test the values returned by numericupdown controls
only within the same project but not when I change project clicking in the
list box?
THANKS FOR YOUR HELP
Pascal
--
the code :
private void SetMazeGroupCon trols()
{
_boInitilizing = true;

// misc
chbNewRow.Check ed = _currParam.NewR ow;
nudMazeCount.Va lue = (decimal)_currP aram.Count;

// generation
nudMazeWidth.Va lue =
(decimal)_currP aram.Generation Data.CarreWidth ;
nudNumMin.Value = (decimal)_currP aram.Generation Data.NumberMin;
nudNumMax.Value = (decimal)_currP aram.Generation Data.NumberMax;
nudCellSize.Val ue = (decimal)_currP aram.ExerciseDa ta.CellSize;
.......

private void lbxMaze_Selecte dIndexChanged( object sender, EventArgs e )
{
int iSelected = lbxMaze.Selecte dIndex;

if( iSelected >= 0 )
{
MazeItemData item = lbxMaze.Items[ iSelected ] as
MazeItemData;
_currParam = item;
SetMazeGroupCon trols();
if( Properties.Sett ings.Default.Ma rkCurrentMaze )
ValueChanged( false );
}

HandleMazeListB uttons();
}

........
private void nudNumMin_Value Changed(object sender, EventArgs e)
{

if (nudNumMin.Valu e >= nudNumMax.Value )
{
MessageBox.Show ("La valeur minimale doit être inférieure à
la valeur maximale.", "Valeur invalide ", MessageBoxButto ns.OK);

nudNumMin.Value = nudNumMax.Value - 1;
}

_currParam.Gene rationData.Numb erMin = (int)nudNumMin. Value;
ValueChanged(tr ue);
}

private void nudNumMax_Value Changed(object sender, EventArgs e)
{
if (nudNumMax.Valu e <= nudNumMin.Value )
{
MessageBox.Show ("La valeur maximale doit être supérieure à
la valeur minimale.", "Valeur invalide ", MessageBoxButto ns.OK);

nudNumMax.Value = nudNumMin.Value + 1;
}
_currParam.Gene rationData.Numb erMax = (int)nudNumMax. Value;
ValueChanged(tr ue);
}

http://www.scalpa.info

[Pascal]

Re: how to test if a selected index has just been change ?

Hello and thanks for this quick response.

I had thinking of "a flag?" able to "switch on or off" a piece of code : i
will dig that and 'll try to find a piece of code that explain how to do
that in C# that i am discovering this year.
Do you know a place to read how to set a flag ?

Thanks to inform me about usenet : if i understood after this "--" only
signature must remain ?

pascal

Just add a flag to your class that you can set while updating the

project based on the ListBox selection change. Set the flag before you
adjust the numeric controls, and clear it after you're done. Then, in the
numeric control event handlers, don't do any range checking if the flag is
set.
>
By the way, next time you post code, you might consider not putting it in
your signature (that is, following the specific Usenet-standard signature
delimiter "-- "). Some newsreaders will format it differently, making it
harder to read, and other newsreaders will strip it out altogether, making
it impossible to read. Obviously, that may limit your audience somewhat
(especially the latter problem :) ).
>
Pete

--

http://www.scalpa.info

http://scalpa98.blogspot.com/

http://scalpa-production.blogspot.com/

[Peter Duniho]

Re: how to test if a selected index has just been change ?

On Wed, 02 Jul 2008 01:02:34 -0700, Pascal <scalpaSansSpam @scalpa.info>
wrote:

Hello and thanks for this quick response.
>
I had thinking of "a flag?" able to "switch on or off" a piece of code :
i will dig that and 'll try to find a piece of code that explain how to
do that in C# that i am discovering this year.
Do you know a place to read how to set a flag ?

By "flag" I simply mean a variable of type "boolean". Sorry I was
imprecise. The word "flag" is commonly used, but I admit that it would
have been better to just use the type name.

Thanks to inform me about usenet : if i understood after this "--" only
signature must remain ?

Almost. The space after the two hyphens is important. But yes, after "--
" (note the space), only a signature should appear.

Pete

[Pascal]

Is it a good flag ?

hello Pete

I did this without success.... don't know why... any idea ?
some where at the beginning of the code boolean declaration :

private bool flagCheckIcomeF romLstBx = false ;
private string _strFile = string.Empty; // loaded file name
(including full path
private bool _boChanged = false; // any changes made on
the current parameters
private bool _boInitilizing = true; // true = initialization
running, suppress redrawing
//..... then if index of listbox changes i turn "on" the flag
private void lbxMaze_Selecte dIndexChanged( object sender, EventArgs e )
{
int iSelected = lbxMaze.Selecte dIndex;
bool flagCheckIcomeF romLstBx = true;

if( iSelected >= 0 )
{
MazeItemData item = lbxMaze.Items[ iSelected ] as
MazeItemData;
_currParam = item;
SetMazeGroupCon trols();
if( Properties.Sett ings.Default.Ma rkCurrentMaze )
ValueChanged( false );
}

HandleMazeListB uttons();
}

//.... then i test if I come from the listbox or not

private void nudNumMin_Value Changed(object sender, EventArgs e)
{
if (flagCheckIcome FromLstBx == false)
{
if (nudNumMin.Valu e >= nudNumMax.Value )
{
MessageBox.Show ("La valeur minimale doit être inférieure
à la valeur maximale.", "Valeur invalide ", MessageBoxButto ns.OK);
nudNumMin.Value = nudNumMax.Value - 1;
}

_currParam.Gene rationData.Numb erMin = (int)nudNumMin. Value;
ValueChanged(tr ue);
}
else
{
_currParam.Gene rationData.Numb erMin = (int)nudNumMin. Value;
ValueChanged(tr ue);
flagCheckIcomeF romLstBx = false;
}
}

private void nudNumMax_Value Changed(object sender, EventArgs e)
{
if (flagCheckIcome FromLstBx == false)
{
if (nudNumMin.Valu e >= nudNumMax.Value )
{
MessageBox.Show ("La valeur minimale doit être inférieure
à la valeur maximale.", "Valeur invalide ", MessageBoxButto ns.OK);

nudNumMin.Value = nudNumMax.Value - 1;
}

_currParam.Gene rationData.Numb erMax = (int)nudNumMax. Value;
ValueChanged(tr ue);
}
else
{
_currParam.Gene rationData.Numb erMax = (int)nudNumMax. Value;
ValueChanged(tr ue);
flagCheckIcomeF romLstBx = false;
}
}


--

http://www.scalpa.info

http://scalpa98.blogspot.com/

http://scalpa-production.blogspot.com/

[Peter Duniho]

Re: Is it a good flag ?

On Wed, 02 Jul 2008 23:51:23 -0700, Pascal <scalpaSansSpam @scalpa.info
wrote:

hello Pete
>
I did this without success.... don't know why... any idea ?
some where at the beginning of the code boolean declaration :

The basic problem is that you are redeclaring the flag as a local variable
in the "lbxMaze_Select edIndexChanged( )" method, hiding the private class
field. So the private class field is never actually changed.

For what it's worth, I wouldn't write "flagCheckIcome FromLstBx == false".
Just write "!flagCheckIcom eFromLstBx" instead.

Also, I wouldn't actually set the flag in the
"lbxMaze_Select edIndexChanged( )" method, because you don't call
"SetMazeGroupCo ntrols()" unless there's actually a selection. When you
wind up with nothing selected, you'll also wind up disabling your
validation for the next time the user actually changes the control value
(assuming they don't change the ListBox selection before that).

Since it's specifically the method "SetMazeGroupCo ntrols()" that will
cause the validation to occur, IMHO that's the method in which you should
set the flag.

Pete

[Pascal]

did it !

Hello Pete

It took me a lot of time to understand the way to do it, but now it works
fine.
Thanks a lot spending time to help me.

here is the code perhaps it can help someone else !

at the beginning of form1.cs
#region variables

private bool flagCheckIcomeF romLstBx = true;

private void nudNumMin_Value Changed(object sender, EventArgs e)
{
if (flagCheckIcome FromLstBx == false)
{
if (nudNumMin.Valu e >= nudNumMax.Value )
{
MessageBox.Show ("La valeur minimale doit être inférieure
à la valeur maximale.", "Valeur invalide ", MessageBoxButto ns.OK);
nudNumMin.Value = nudNumMax.Value - 1;
}

_currParam.Gene rationData.Numb erMin = (int)nudNumMin. Value;
ValueChanged(tr ue);
}
else
{
_currParam.Gene rationData.Numb erMin = (int)nudNumMin. Value;
ValueChanged(tr ue);
flagCheckIcomeF romLstBx = false;
}
}

private void nudNumMax_Value Changed(object sender, EventArgs e)
{
if (flagCheckIcome FromLstBx == false)
{
if (nudNumMin.Valu e >= nudNumMax.Value )
{
MessageBox.Show ("La valeur minimale doit être inférieure
à la valeur maximale.", "Valeur invalide ", MessageBoxButto ns.OK);

nudNumMin.Value = nudNumMax.Value - 1;
}

_currParam.Gene rationData.Numb erMax = (int)nudNumMax. Value;
ValueChanged(tr ue);
}
else
{
_currParam.Gene rationData.Numb erMax = (int)nudNumMax. Value;
ValueChanged(tr ue);
flagCheckIcomeF romLstBx = false;
}
}

private void SetMazeGroupCon trols()
{
_boInitilizing = true;
flagCheckIcomeF romLstBx = true;

// misc
chbNewRow.Check ed = _currParam.NewR ow;
nudMazeCount.Va lue = (decimal)_currP aram.Count;

// generation
nudMazeWidth.Va lue =
(decimal)_currP aram.Generation Data.CarreWidth ;
nudNumMin.Value = (decimal)_currP aram.Generation Data.NumberMin;
nudNumMax.Value = (decimal)_currP aram.Generation Data.NumberMax;
nudCellSize.Val ue = (decimal)_currP aram.ExerciseDa ta.CellSize;

// Exercise parameters
chbExerciceShow Cible.Checked =
_currParam.Exer ciseData.ShowCi ble;
pnlExerciceCibl eColor.BackColo r =
_currParam.Exer ciseData.CibleC olor;
chbExerciseShow Numbers.Checked =
_currParam.Exer ciseData.ShowNu mbers;
pnlExerciseNumb erColor.BackCol or =
_currParam.Exer ciseData.Number Color;
chbExerciseShow Solution.Checke d =
_currParam.Exer ciseData.ShowSo lution;
pnlExerciseSolu tionColor.BackC olor =
_currParam.Exer ciseData.Soluti onColor;
chbExerciseShow Walls.Checked =
_currParam.Exer ciseData.ShowWa lls;
nudExerciseWall Width.Value =
(decimal)_currP aram.ExerciseDa ta.WallWidth;

// Solution parameters
chbSolutionShow Cible.Checked =
_currParam.Solu tionData.ShowCi ble;
pnlSolutionCibl eColor.BackColo r =
_currParam.Solu tionData.CibleC olor;
chbSolutionShow Numbers.Checked =
_currParam.Solu tionData.ShowNu mbers;
pnlSolutionNumb erColor.BackCol or =
_currParam.Solu tionData.Number Color;
chbSolutionShow Solution.Checke d =
_currParam.Solu tionData.ShowSo lution;
pnlSolutionSolu tionColor.BackC olor =
_currParam.Solu tionData.Soluti onColor;
chbSolutionShow Walls.Checked =
_currParam.Solu tionData.ShowWa lls;
nudSolutionWall Width.Value =
(decimal)_currP aram.SolutionDa ta.WallWidth;

_boInitilizing = false;
}

All the code is from daniel marcel Camenzind who made a beautiful and handy
soft that save me a lot of time in my job see here "labyrintha les"
http://www.scalpa.info/new_logiciels.php and for fun and learning C# i try
to clone it to do another soft "Carrés magiques".
Thanks to both of you sharing your knowledge.
pascal