Solved

How to handle the dbnavigator?

Posted on 2008-11-02
13
264 Views
Last Modified: 2012-05-05
Hi Folks,

Using this procedure > TForm1.dbNavClick(Sender: TObject; Button: TNavigatorButton);
begin

How Can I differentiate which button is clicked a working sample would be great ;)

Regards,

Peter
0
Comment
Question by:PeterdeB
  • 6
  • 3
  • 3
  • +1
13 Comments
 

Author Comment

by:PeterdeB
ID: 22862752
Ah wait lol I can't right or better said I needn't?
0
 
LVL 28

Accepted Solution

by:
2266180 earned 500 total points
ID: 22863076
the button clicked is in Button: TNavigatorButton

you use it like:

case button of
  nbFirst: showmessage('first clicked');
  nbprior:showmessage('prior clicked');
..... etc
end;
you can find teh possible values in help by clicking on TNavigateBtn and hitting ctrl+F1
here is the definition:
TNavigateBtn = (nbFirst, nbPrior, nbNext, nbLast,
                  nbInsert, nbDelete, nbEdit, nbPost, nbCancel, nbRefresh);
0
 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22863085
procedure gofirst;
..

procedure goprior;
..


TForm1.dbNavClick(Sender: TObject; Button: TNavigatorButton);
begin
If button=nbfirst then gofirst else
if button=nbprior then goprior etc.
end;
0
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22863089
ciuly can type faster than me!
0
 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22863096
bonus comment: more things to do with navigate

http://delphi.about.com/od/usedbvcl/l/aa090203a.htm
0
 
LVL 28

Expert Comment

by:2266180
ID: 22863104
>> ciuly can type faster than me!

actually, it's been almost an hour since he posted his question :P
0
 
LVL 37

Expert Comment

by:Geert Gruwez
ID: 22863125
what are you trying to do ?
you can provide your own routines instead of the datasets ones
0
 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22863169
>actually, it's been almost an hour since he posted his question :P

we all wait for the Hourly Expert Alerts, by the look of it.
0
 
LVL 28

Expert Comment

by:2266180
ID: 22863205
>> we all wait for the Hourly Expert Alerts, by the look of it.

actually, I was watching a movie :D I get the alerts by the minute :P
0
 

Author Comment

by:PeterdeB
ID: 22863850
Thanks all! I noticed that it was possible to edit the database without saving it, closing the program and then the modifications were lost. So I thouhgt maybe I could use the different buttons and buttonclicks in conjunction with teh close query to determine wheter or not to close the program. It's for a friend of mine.

Regards,

Peter

0
 

Author Closing Comment

by:PeterdeB
ID: 31512528
As always muchos gracias my friend!
0
 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22865117
You can check if the table is in a Modified state.  Use CloseQuery to terminate the program, and set the "Accept" variable according to whether or not the table is in Modified state.  If you DoubleClick the CloseQuery Event on the Form, look at the header of the event, you will see the Accept variable there.  All you have to do is plonk the correct value in the procedure to either Accept the Close, or reject the Form's closure.

Other things that might be of interest:-

similarly, if you want the user to explicitly Post a Record before using First, Next, Prior, First or Last, you can either disable these buttons until Table Modified is False (either the user has pressed Post or Cancel), or you can wait for the user to press one of these buttons, then Showmessage('Can not do this'); if Table is Modified.

There is nothing to stop you having more than one DBNavigator for your Datasource - you could have one for First Prior Next Last, and another for the other Buttons/functions (Post, Cancel, etc).
0
 
LVL 31

Expert Comment

by:moorhouselondon
ID: 22865140
procedure TForm2.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin

Sorry, it's not Accept, it's CanClose.  In which case you can say

CanClose:=not tablex.modified;
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

820 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question