Using Delphi name OR .JSName in a JS function?

[ZigZig]

Hi everybody,

 

When using AddJS() to execute some JavaScript on client side, it seems that we can concatenate SomeComponent.JsName to a JS function: MyComponent.JsName+'.someFunction()', or directly use its Delphi name : 'MainForm.MyComponent.someFunction()' : 

UniSession.AddJS(SomeComponent.JSName+'.someFunction();');
UniSession.AddJS('MainForm.SomeComponent.someFunction();');

Ex :

UniSession.AddJS(UniStringGrid1.JSName+'.store.suspendEvents();');
UniSession.AddJS('MainForm.UniStringGrid1.store.suspendEvents();');

 

Both seem to work perfectly. Is it right?

What is the difference? Is there a best practice?

 

 

Thanks a lot!

[Farshad Mohajeri]

It depends on you. Delphi names provides a more convenient way because it is more readable and easy to remember. Especially when you code in js client event screen.

[ZigZig]

Thank you Farshad!

 

So, apart from my personal convenience, there is no difference?

[tappatappa]

I found that in some cases delphi name doesn't work. Maybe I am not using the Delphi name correctly, but here is my experience: recently I had to call some functions of the main form when as soon comes up, and I had to use its JSName, which I have found to be (unsurprisingly ) "O0"

 

Here is an example
 

Form1.toFront(); //doesn't work
O0.toFront(); //its JSName, WORKS

Also, you need to use the JSName when firing (client side) the Ajax events.

Ajax=1&IsEvent=1&Obj=O0&Evt=activate&this=O0&_S_ID=zX4rfeDert67Gbe&_seq_=0

[Farshad Mohajeri]

 

I found that in some cases delphi name doesn't work. Maybe I am not using the Delphi name correctly, but here is my experience: recently I had to call some functions of the main form when as soon comes up, and I had to use its JSName, which I have found to be (unsurprisingly ) "O0"

 

Here is an example

 

Form1.toFront(); //doesn't work
O0.toFront(); //its JSName, WORKS

Also, you need to use the JSName when firing (client side) the Ajax events.

Ajax=1&IsEvent=1&Obj=O0&Evt=activate&this=O0&_S_ID=zX4rfeDert67Gbe&_seq_=0

 

Some components have sub components.

 

For example:

 

Form1.form

Form1.window

 

You can see this from ClientEvents dialog.

[Farshad Mohajeri]

Thank you Farshad!

 

So, apart from my personal convenience, there is no difference?

 

Technically there is no difference.

[M477H13U]

Hello everyones !

 

Does it mean we can call all js fonction by this way ?

For instance :

UniSession.AddJS(UniDBGrid1.JSName+'.cellModel.select();');

[Sherzod]

Hi,

 

If this is an acceptable method, then yes

[M477H13U]

I meant the ClientEvents functions !?

 

Then, how do you pass parameters ?

Could you give me an example with the method UniSession.AddJS(UniDBGrid1.JSName+'.cellModel.select();'); ? (:

[Sherzod]

I'm sorry, please explain a little more what you wanted

[M477H13U]

I meant,

is it possible to launch 'ClientEvents ' fonctions inside of Delphi code by this way ?

For instance, if I want to select a specific cell in a uniDBGrid, could I call the function as I wrote above ?

If so, how can I pass parameters ?

(is it more limpid now ?  )

[Sherzod]

Maybe you need to use like in this post ?!:

 

http://forums.unigui.com/index.php?/topic/9171-dbgrid-cell-focus/&do=findComment&comment=47498

[M477H13U]

I got two use case in my grid:

1. Multiselection Option: After a grid refresh, I would like to keep the same selected row. But arrows are not controling movement anymore, you have to click first on grid body ....
2. CellSelection Option: Same problem but different approach!

First of all, how could I keep "focus" on my body grid (I actually got the focus as the onKeyDown event is fire, but arrows are not responding) and then retrieve selected row/cell ?

Any workaround ?

[M477H13U]

Hello everyones!

 

I manage to do what I want but I still have two question:

 

Is the initialization of RecNo to 0 native on grid while refreshing the grid ? How could I override that in order to keep focus after a reconstruction of grid (in order to change grid options) or after grid refresh ?

[Sherzod]

Hi,

 

Sorry, can you clarify your question once again ?!

[M477H13U]

No worries! (:

 

The use case is as following:

 

you're in a uniDBgrid with row 4 selected, and you apply a grid refresh. After the refresh, the row number 0 will constatnly be selected and previously selected row will be lost. How can I override this behavior ?

[Sherzod]

Hi,

 

Well, you can try this solution, for example:

 

1.

public
    { Public declarations }
    SavePlace: TBookmark;
  end;

2. UniDBGrid1 -> ClientEvents -> ExtEvents -> store.beforeload:

function store.beforeload(store, operation, eOpts)
{
    ajaxRequest(store.grid, '_beforeload', [])
}

3. UniDBGrid1 -> OnAjaxEvent:

procedure TMainForm.UniDBGrid1AjaxEvent(Sender: TComponent; EventName: string;
  Params: TUniStrings);
begin
  if EventName = '_beforeload' then
  begin
    if Assigned(SavePlace) then UniDBGrid1.DataSource.DataSet.FreeBookmark(SavePlace);
    SavePlace := UniDBGrid1.DataSource.DataSet.GetBookmark
  end;

end;

4. UniDBGrid1 -> OnAfterLoad:

procedure TMainForm.UniDBGrid1AfterLoad(Sender: TUniDBGrid);
begin
  Sender.DataSource.DataSet.GotoBookmark(SavePlace);
end;

Best regards,

[Sherzod]

But you need to think about pagination!

[M477H13U]

Okay, I will try your solution later and give you a feedback ! (:

[Sherzod]

Ok