OpenEuphoria

2. Re: Win32Lib: Disable Focusability

• Posted by Derek Parnell <ddparnell at bigpond.com> Aug 04, 2004
• 483 views

cklester wrote:
> 
> How would I make a ListView unfocusable? That is, I want the list
> to display normally, but I want to prevent any selection. If I
> "disable" the list, it displays with a gray background and light
> characters and it cannot be scrolled. I know there must be a way
> to make it display normally, but just not be able to have selections
> made, yet still scroll it. :)

What's the problem with making selections? You don't have to *do* anything
when a selection is made. 

Anyhow, there is no real easy way to do this.  You might have to catch
selection events then deselect the item manually.

Alternatively, you could use an owner-drawn listview, but that is **LOTS**
of work. 

Have you tried make a listview without a scroll bar, and do your own
scrollbar next to it. That way you could disable the listview, change
the background back to its normal color, and still manage the scrolling.
This would still be a lot of work.

So I don't really know if its worth the effort.

-- 
Derek Parnell
Melbourne, Australia

4. Re: Win32Lib: Disable Focusability

• Posted by Jonas Temple <jtemple at yhti.net> Aug 04, 2004
• 481 views

cklester wrote:
> Well, I don't want my user thinking, "Okay, I've selected it. What can
> I do with it?" Just a nice, plain, black text on white background list
> that can be scrolled.
> 

CK,

There is another option...you can use Phil Russel's EuGrid to accomplish 
the task. It involves creating a Grid with static controls, disabling row
selection and disabling cell border highlighting.  It looks kinda like a 
list view and the user can't select a row.  Here's a small example that I
"whipped" up, hope it helps (note that I created the whole thing with the
IDE).

Jonas

--  code generated by Win32Lib IDE v0.18.17

 
include Win32Lib.ew
without warning
include euGrid.ew
atom gridvoid

--------------------------------------------------------------------------------
--  Window Main
constant Main = createEx( Window, "Simulated Read Only List View", 0, Default,
Default, 530, 436, 0, 0 )
integer TestGrid TestGrid = EGW_CreateGrid( Main, 24, 24, 480, 316, 1 )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ACTIVE_HEADERS, False )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ALLOW_COL_SORT, False )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_CELL_BORDER, False )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ROW_HEADER_DATACOL,EGW_ROWNUM )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ROW_SELECT,EGW_NONE )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ROW_HEADER_WIDTH,0 )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_COL_HEADER_HEIGHT,20 )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_BACKGROUND_COLOR,16777215 )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_BACKGROUND_COLOR,16777215 )
integer Col1 Col1 = EGW_AddColumn( TestGrid, "Column 1", 100, EGW_LAST,
EGW_STATIC, 1 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col1, EGW_COL_WIDTH, 148 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col1, EGW_COL_BACKGROUND_COLOR,
16777215)
integer Col2 Col2 = EGW_AddColumn( TestGrid, "Column 2", 100, EGW_LAST,
EGW_STATIC, 2 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col2, EGW_COL_WIDTH, 148 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col2, EGW_COL_BACKGROUND_COLOR,
16777215)
integer Col3 Col3 = EGW_AddColumn( TestGrid, "Column 3", 100, EGW_LAST,
EGW_STATIC, 3 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col3, EGW_COL_WIDTH, 148 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col3, EGW_COL_BACKGROUND_COLOR,
16777215)
constant OkayPB = createEx( DefPushButton, "Okay", Main, 28, 360, 88, 28, 0, 0 )
---------------------------------------------------------
--------------------------------------------------------------------------------
procedure Main_onOpen (integer self, integer event, sequence params)--params is
()
	sequence grid_data
	atom void
	-- Put some data in the grid
	grid_data = {
		{"Row 1 Col 1","Row 1 Col 2","Row 1 Col 3"},
		{"Row 2 Col 1","Row 2 Col 2","Row 2 Col 3"},
		{"Row 3 Col 1","Row 3 Col 2","Row 3 Col 3"}}
	void = EGW_LoadData(TestGrid,grid_data,EGW_REPLACE)
end procedure
setHandler( Main, w32HOpen, routine_id("Main_onOpen"))
--------------------------------------------------------------------------------
procedure OkayPB_onClick (integer self, integer event, sequence params)--params
is ()
	closeWindow(Main)
end procedure
setHandler( OkayPB, w32HClick, routine_id("OkayPB_onClick"))


WinMain( Main,Normal )

6. Re: Win32Lib: Disable Focusability

• Posted by cklester <cklester at yahoo.com> Aug 04, 2004
• 503 views

Jonas Temple wrote:
> 
> list view and the user can't select a row.  Here's a small example that I
> "whipped" up, hope it helps (note that I created the whole thing with the
> IDE).

Jonas, some of the code got cremated...

> <font
> color="#FF0055">--------------------------------------------------------------------------------</font>
> <font color="#FF0055">--  Window Main</font>
> <font color="#0000FF">constant </font><font color="#330033">Main = createEx(
> Window, </font><font color="#00A033">"Simulated Read Only List View"</font><font
> color="#330033">, 0, Default, Default,</font>

Like that one...

Could you repost that again?! :)

-=ck
"Programming in a state of EUPHORIA."
http://www.cklester.com/euphoria/

8. Re: Win32Lib: Disable Focusability

• Posted by Jonas Temple <jtemple at yhti.net> Aug 04, 2004
• 490 views

cklester wrote:
> 
> Jonas, some of the code got cremated...
> 
> Could you repost that again?! :)
> 
> -=ck
Double arrggghhhh!!!!!!

I just looked at the post on EuForm and there were a few more lines that
got truncated.  This one should do it :)

Rob, is there any way to fix this problem?

Jonas

--  code generated by Win32Lib IDE v0.18.17

 
include Win32Lib.ew
without warning
include euGrid.ew
atom gridvoid

--------------------------------------------------------------------------------
--  Window Main
constant Main = createEx( Window, "Simulated Read Only List View", 0, 
Default, Default, 530, 436, 0, 0 )
integer TestGrid TestGrid = EGW_CreateGrid( Main, 24, 24, 480, 316, 1 )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ACTIVE_HEADERS, False )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ALLOW_COL_SORT, False )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_CELL_BORDER, False )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ROW_HEADER_DATACOL,EGW_ROWNUM )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ROW_SELECT,EGW_NONE )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_ROW_HEADER_WIDTH,0 )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_COL_HEADER_HEIGHT,20 )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_BACKGROUND_COLOR,16777215 )
gridvoid = EGW_SetGridProperty( TestGrid, EGW_BACKGROUND_COLOR,16777215 )
integer Col1 Col1 = EGW_AddColumn( TestGrid, "Column 1", 100, EGW_LAST, 
EGW_STATIC, 1 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col1, EGW_COL_WIDTH, 148 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col1, EGW_COL_BACKGROUND_COLOR,
16777215)
integer Col2 Col2 = EGW_AddColumn( TestGrid, "Column 2", 100, EGW_LAST, 
EGW_STATIC, 2 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col2, EGW_COL_WIDTH, 148 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col2, EGW_COL_BACKGROUND_COLOR,
16777215)
integer Col3 Col3 = EGW_AddColumn( TestGrid, "Column 3", 100, EGW_LAST, 
EGW_STATIC, 3 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col3, EGW_COL_WIDTH, 148 )
gridvoid = EGW_SetColumnProperty( TestGrid, Col3, EGW_COL_BACKGROUND_COLOR,
16777215)
constant OkayPB = createEx( DefPushButton, "Okay", Main, 28, 360, 88, 28, 0, 0 )
---------------------------------------------------------
--------------------------------------------------------------------------------
procedure Main_onOpen (integer self, integer event, sequence params)--params is
()
	sequence grid_data
	atom void
	-- Put some data in the grid
	grid_data = {
		{"Row 1 Col 1","Row 1 Col 2","Row 1 Col 3"},
		{"Row 2 Col 1","Row 2 Col 2","Row 2 Col 3"},
		{"Row 3 Col 1","Row 3 Col 2","Row 3 Col 3"}}
	void = EGW_LoadData(TestGrid,grid_data,EGW_REPLACE)
end procedure
setHandler( Main, w32HOpen, routine_id("Main_onOpen"))
--------------------------------------------------------------------------------
procedure OkayPB_onClick (integer self, integer event, sequence params)--params
is ()
	closeWindow(Main)
end procedure
setHandler( OkayPB, w32HClick, routine_id("OkayPB_onClick"))


WinMain( Main,Normal )

10. Re: Win32Lib: Disable Focusability

• Posted by cklester <cklester at yahoo.com> Aug 04, 2004
• 513 views

Don wrote:
> 
> 1> subclass the control and intercept all mouse events unless
>    its over the scroll bar.

Can you explain what it means to subclass a control? Thanks!!! :)

-=ck
"Programming in a state of EUPHORIA."
http://www.cklester.com/euphoria/

12. Re: Win32Lib: Disable Focusability

• Posted by Don <eunexus at yahoo.com> Aug 04, 2004
• 491 views

> > 1> subclass the control and intercept all mouse events unless
> >    its over the scroll bar.
> 
> Can you explain what it means to subclass a control? Thanks!!! :)

Sure thing.

Lets say you create a plain window and have a message loop for it.
In most cases (with Win32Lib) it has a message loop and it doles out
messages to your routines depending on which ones you need.

Subclassing involves taking over of the normal message loop and replacing
it with one of your own.  I could (in effect) have Windows send my routine
*all* messages meant for the window before Win32Lib (or anything else)
can see it and do my own processing first.  In the case of the ListView,
we could subclass the control and handle all mouse events ourselves.  Any
message we dont process I can pass to its normal handler (Win32Lib).  Its
simply a way to customize a controls behaviour with our own routine.


Don Phillips - aka Graebel
     National Instruments
     mailto: eunexus @ yahoo.com

14. Re: Win32Lib: Disable Focusability

• Posted by Don <eunexus at yahoo.com> Aug 05, 2004
• 498 views

> D'oh!! I forgot about the 'subclassing' trick. 
> 
> In Win32lib, all you need to do to avoid selecting items in a listview
> is this ...
> 
>  procedure Event_lv(integer self, integer event, sequence parms)
>    if find(parms[1],{WM_LBUTTONDOWN, WM_RBUTTONDOWN}) then
>       returnValue(-1)
>    end if
>  end procedure
>  setHandler(lv, w32HEvent, routine_id("Event_lv"))

Cool =) thanks Derek...
Saves me the trouble of firing up the old text editor hehe


Don Phillips - aka Graebel
     National Instruments
     mailto: eunexus @ yahoo.com