How to highlight current line

[Rohit Taralekar]

I have tried following snippet but it is not highlighting the line

scintillaTextEditor.Lines[1].Select();

scintillaTextEditor.Selection.BackColor = Color.Red;

plz help...:-(

[Neil Hodgson]

Rohit Taralekar:

> I have tried following snippet but it is not highlighting the line
>
> scintillaTextEditor.Lines[1].Select();

You are using a wrapper I am unfamiliar with. In basic Scintilla a line is selected by finding its start and end and selecting that range. SCI_POSITIONFROMLINE, SCI_SETSELECTIONSTART, SCI_SETSELECTIONEND.

Neil

[CNavarro]

Good afternoon

I'm doing a wrapper Harbour and want to create a message that allows me to select the current line ( Not highlighting the line )

I am making the following tests but can not get the line is highlighted

 nLine := ::Send( SCI_LINEFROMPOSITION, ::Send( SCI_GETCURRENTPOS, 0, 0 ), 0 )

Test-1

nStart    := ::Send( SCI_POSITIONFROMLINE, nLine , 0 )

nEnd      := ::Send( SCI_GETLINEENDPOSITION, nLine , 0 )

::Send( SCI_SETSELECTIONSTART, nStart, 0 ) 

::Send( SCI_SETSELECTIONEND, nEnd, 0 )

Test - 2

nStart    := ::Send( SCI_POSITIONFROMLINE, nLine , 0 )

nEnd      := ::Send( SCI_GETLINEENDPOSITION, nLine , 0 )

::Send( SCI_SETANCHOR, nStart, 0 )

::Send( SCI_SETCURRENTPOS, nEnd, 0 )

Test - 3

nStart    := ::Send( SCI_POSITIONFROMLINE, nLine , 0 )

nEnd      := ::Send( SCI_GETLINEENDPOSITION, nLine , 0 )

::Send( SCI_SETSEL, nStart, nEnd )

Not highlighting the line

But the command

::Send( SCI_SETSEL, nStart, -1 )

If it works well, and I select from the cursor position to the end of file

Please, I stand with this issue for some time

I forget that?

( Google translator )

Regards

[Neil Hodgson]

CNavarro:

> I am making the following tests but can not get the line is highlighted
>
> nLine := ::Send( SCI_LINEFROMPOSITION, ::Send( SCI_GETCURRENTPOS, 0, 0 ), 0 )

…

You should print out each variable to check that they are sensible.

Check whether the selection appears after redrawing, perhaps by dragging the window a little larger to force a redraw.

Neil

[CNavarro]

Neil, thanks

I've been doing debug the value of variables and believe is right

I do not see the error

Example:

I am on line 0, position 0, which contains 21 characters

I executed the code for the example is:

nStart    := ::Send( SCI_POSITIONFROMLINE, nLine - 1, 0 )

nEnd      := ::Send( SCI_GETLINEENDPOSITION, nLine - 1, 0 )

::Send( SCI_SETCURRENTPOS, nEnd, 0 )

::Send( SCI_GOTOPOS, nEnd, 0 )

::Send( SCI_SETANCHOR, nStart, 0 )

Values of variables

nStart = 0      nEnd = 21       ::Send( SCI_GETANCHOR, 0, 0 ) = 0        ::Send( SCI_GETSELECTIONSTART, 0, 0 ) = 0        ::Send( SCI_GETSELECTIONEND, 0, 0 ) = 21

But I do not get that the line is highlighted

The window is maximized

Please, 

I just need the correct logic to implement the necessary commands ( see Test of my post previous )

Thanks in advance

[Neil Hodgson]

CNavarro:

> I executed the code for the example is:
>
> nStart := ::Send( SCI_POSITIONFROMLINE, nLine - 1, 0 )

nLine-1 doesn’t look good: the line returned from SCI_LINEFROMPOSITION is 0 based and its simpler if all code treats the first line as line 0.

> ::Send( SCI_GETSELECTIONEND, 0, 0 ) = 21
>
> But I do not get that the line is highlighted

Maybe your background colour or line background is too heavy to see the selection. Turn them off or set selection background to bright red.

Neil

[CNavarro]

Neil

- nLine-1

You're right, but I use the following statement in my program

nLine  := :: GetCurrentLine () + 1

That's not a problem.

I know Scintilla used as first line the value 0

- Colors background 

If I press double click on the line is highlighted

If I use the keyboard (SHIFT + Cursors, SHIFT + End, etc) line is highlighted

If executed by code (SCI_SETSEL, nPos, -1) the text to the end of the document is highlighted well

All previous cases work well with the defined highlighting color

The highlight color is defined at the beginning of the application

// :: Send (SCI_SETSELFORE, 1 CLR_WHITE)

    :: Send (SCI_SETSELBACK, 1, RGB (0, 179, 179))

I'm desperate

I do not know what else I can do tests

Help, please

Thanks 

[CNavarro]

I forgot to mention that the multiple selection is active

::Send( SCI_SETMULTIPLESELECTION, 1, 0 )

Thanks

[Neil Hodgson]

CNavarro:

> I'm desperate
> I do not know what else I can do tests

Is the caret blinking?

Neil

[CNavarro]

Yes

Thanks

[Neil Hodgson]

CNavarro:

> Yes

If the cursor blinks then that means that the line with the caret is being redrawn so its not just needing a display refresh.

Can’t see any reason for the selection not to show.

Neil

[CNavarro]

The cursor is blinking but stays at the beginning of the line

Should not keep the cursor at the end of the line or the beginning of next?

Thanks for your time

[CNavarro]

Neil

Now I understand your comments

My tests and research have taken a different path

I am still far from dominating Scintilla

Thanks for everything

Pd .: Scintilla could add to a message, eg: SCI_SELLINE   :)

[Neil Hodgson]

CNavarro:

> The cursor is blinking but stays at the beginning of the line
> Should not keep the cursor at the end of the line or the beginning of next?

Yes, the caret should be at the end of the line. Something is going badly wrong here but I can’t tell what.

Neil

[CNavarro]

Thanks, Neil

I'm reviewing the code line by line

Sure thanks to him as above to find the problem