Checkbox Tri-State

[sambomb]

How to implement the Tri State checkbox?

[Enrico Maria Giordano]

Use BS_AUTO3STATE style.

EMG

[sambomb]

Use Where?
In the Pelles C I found, but I dont know what class to (re)define

[Enrico Maria Giordano]

This is a sample of how I define it:

Code: Select all  Expand view

CONTROL "Interni:", 136, "BUTTON", BS_AUTO3STATE | BS_LEFTTEXT | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 385, 110, 30, 12

EMG

[sambomb]

Enrico, I use redefine, I think that I can change the TCheckbox class to work with 3 states or maybe create a new class with inheritance from TCheckbox.
But I hope that there is a easier way

[Enrico Maria Giordano]

Here it is:

Code: Select all  Expand view

   nCsn = 2

    REDEFINE CHECKBOX oCsn VAR csn;
             ID 111 OF oDlgAna;
             ON CLICK ( ::SendMsg( BM_SETCHECK, ( nCsn + 1 ) % 3 ),;
                        nCsn := ::SendMsg( BM_GETCHECK ) )

EMG

[sambomb]

Enrico, this code didn't work right...
I want to change the var to work as a integer instead of logical
0 = Unchecked
1 = Checked
2 = Full Checked

[Enrico Maria Giordano]

Please check nCsn variable in my sample above.

EMG

[sambomb]

Error description: Error BASE/1003 Variable does not exist: BM_GETCHECK

[Enrico Maria Giordano]

Code: Select all  Expand view

// Button messages

#define BM_GETCHECK 240
#define BM_SETCHECK 241
#define BM_GETSTATE 242
#define BM_SETSTATE 243
#define BM_SETSTYLE 244

EMG

[sambomb]

Now It's working fine!
Thanks a lot

Code: Select all  Expand view

#include "fivewin.ch"

#define BM_GETCHECK 240
#define BM_SETCHECK 241
#define BM_GETSTATE 242
#define BM_SETSTATE 243
#define BM_SETSTYLE 244

Procedure TestTriCheck()

Private oDlg, oChk, lChk, nChk := 0, oBtnTest, oBtnExit

   Define   Dialog      oDlg;
            Resource    "DIALOG_TEST";
            Of          oWnd

   Redefine CheckBox    oChk;
            var         lChk;
            Update;
            ID          101;
            Of          oDlg;
            ON CLICK  ( oChk:SendMsg( BM_SETCHECK, ( nChk+ 1 ) % 3 ),;
                        nChk := oChk:SendMsg( BM_GETCHECK ) )

   Redefine ButtonBmp   oBtnTest;
            ID          102;
            of          oDlg;
            Prompt      "Test ";
            action      MsgInfo(Str(nChk));
            Update;
            TextRight

   Redefine ButtonBmp   oBtnExit;
            ID          103;
            of          oDlg;
            Prompt      "End ";
            action      oDlg:End();
            Update;
            TextRight
                       
   Activate Dialog      oDlg;
            CENTER
           
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