Home » Community » Newbie corner » Coloring a row in a SqlArray
| Coloring a row in a SqlArray [message #50154] |
Thu, 09 August 2018 14:34  |
Giorgio
Messages: 218
Registered: August 2015
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Experienced Member |
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Hi there,
is there a way to set the color of a row of a SqlArray basing on a value of the related record in the database?
I have this SqlArray and - according on the value of a certain field that is not shown on screen - the line itself should be green or not colored.
So far, I have set a callback to the post query event: mySqlArray.WhenPostQuery = THISBACK(ColorLines).
The ColorLines() method is as follows:
void MyApp::ColorLines()
{
for(int i = 0;i<mySqlArray.GetCount();i++) {
mySqlArray.SetCursor(i);
if(DB_data.IsAvailable(mySqlArray.GetKey()))
JobList.SetLineColor(i, LtGreen());
}
}
The DB_data.IsAvailable() method, checks the value of the field Available for the record: if the value is Y (yes) the method returns true, and the row will be colored in green. This approach works, indeed, but it seems to me really inefficient: to fill in the table I have just issued a select statement to the table, now I am issuing an additional select for each row of the table. Is there a way for me to set the color at the same tome when filling the table?
As a side question: to get the *value* of the primary key there is the very convenient method GetKey(). The problem is that it returns "the value of the current row's primary key". To go through all the rows, I have to use SetCursursor(i) in the for loop to make the i-th row the current one. Does it exist a method like GetKey(int i) that returns the value of the key of the i-th row?
Regards,
Gio
[Updated on: Thu, 09 August 2018 14:37] Report message to a moderator |
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| Re: Coloring a row in a SqlArray [message #50186 is a reply to message #50154] |
Mon, 20 August 2018 08:43  |
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mirek
Messages: 13975
Registered: November 2005
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Ultimate Member |
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Giorgio wrote on Thu, 09 August 2018 14:34
The DB_data.IsAvailable() method, checks the value of the field Available for the record: if the value is Y (yes) the method returns true, and the row will be colored in green. This approach works, indeed, but it seems to me really inefficient: to fill in the table I have just issued a select statement to the table, now I am issuing an additional select for each row of the table. Is there a way for me to set the color at the same tome when filling the table?
Unfortunate... really unfortunate.
Either you can consider to fill the table NOT USING Query and set line color as you add rows. In that case, it is possible that you will rather want to use ArrayCtrl instead.
Or you can AddIndex to store the value that you wish to use for the color, then either setup Display based on the index or just test this index in ColorLines.
Depends on what is in "IsAvailable"...
Quote:
As a side question: to get the *value* of the primary key there is the very convenient method GetKey(). The problem is that it returns "the value of the current row's primary key". To go through all the rows, I have to use SetCursursor(i) in the for loop to make the i-th row the current one. Does it exist a method like GetKey(int i) that returns the value of the key of the i-th row?
Yeah, that is not right approach. Just use .Get(i, 0) - primary key is by definition always the first index.
Mirek
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| Re: Coloring a row in a SqlArray [message #50210 is a reply to message #50186] |
Mon, 27 August 2018 13:16 |
Giorgio
Messages: 218
Registered: August 2015
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Experienced Member |
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mirek wrote on Mon, 20 August 2018 08:43
Or you can AddIndex to store the value that you wish to use for the color, then either setup Display based on the index or just test this index in ColorLines.
Hi Mirek,
thanks for the answer, the AddIndex() method worked as a charm.
Before you answered, to fix this issue, I added a "hidden" column (a column with a width of -1) containing the value used to color the lines. That worked, but the user was able to see that value if he manually changed the column width. I searched for a method to make the column really hidden, but I did not find it (there is a Hide() method, but is for Ctrl). So, just to get to know better UPP, does such method exist?
Regards,
Gio
[Updated on: Mon, 27 August 2018 13:16] Report message to a moderator |
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