Best Technique to refresh a DIALOG

[Christopher Becker]

Hi everyone. I'm using PB/Win 8. I have an application that first creates about 100 small bitmap images, then adds them to a DIALOG as CONTROLs (clickable buttons). The user can add new CONTROLS (clickable buttons), but when this happens, I want to refresh the dialog screen because the button images need to be in a re-sorted order.

The question: what's the best technique to refresh the DIALOG? Use DIALOG END and re-create it? Or use GRAPHICS to overwrite the screen and re-draw the image buttons? If I re-draw the buttons, will there be an issue of using CONTROL ADD with the same id# more than once?

I'm reluctant to use DIALOG END because it would be triggered from deep inside a CALLBACK function, but the main DIALOG SHOW statement is the last line way up in PBMAIN(). It would take some work to loop back to it.

Thanks.
Christopher

[Michael Mattias]

Move the controls to their new position based on the new sort order and repainting is automatic.

However, I think for this many controls I'd use the BeginDeferWindowPos/DeferWindowPos/EndDeferWindowPos sequence to avoid flicker.

MCM

[Michael Mattias]

Considered using a listview control in small icon mode?

There are 'arrange' commands for the listview (LVM_SETITEMPOSITION) which do this kind of thing quite efficiently;
and, you can use a single image list to hold all the image handles.

Plus, it would allow the user to do his own arranging of icons on the screen.

It's a thought.

[Chris Boss]

It may be better to simulate multiple buttons using a Graphic control.

Here is an example:

' ***************************************************************
'   This code can be used Royalty Free and Freely Distributed !
' ***************************************************************
#COMPILE EXE
#REGISTER NONE
#DIM ALL          '  This is helpful to prevent errors in coding
#INCLUDE "win32api.inc"   ' Must come first before other include files !
' *************************************************************
'                  Constants and Declares (#1)
' *************************************************************
DECLARE SUB LIB_InitFonts()
DECLARE SUB LIB_InitColors()
DECLARE SUB LIB_DeleteBrushes()
%FORM1_GRAPHIC1             = 100
%FORM1_RSBUTTON           = 105
' --------------------------------------------------
DECLARE SUB ShowDialog_Form1(BYVAL hParent&)
DECLARE CALLBACK FUNCTION Form1_DLGPROC
' --------------------------------------------------
DECLARE CALLBACK FUNCTION CBF_FORM1_RSBUTTON()
'
' *************************************************************
'               Application Globals Variables (#2)
' *************************************************************
'
GLOBAL App_Brush&()
GLOBAL App_Color&()
GLOBAL App_Font&()
GLOBAL hForm1&    ' Dialog handle
'
' *************************************************************
'                    Application Entrance
' *************************************************************
'
FUNCTION PBMAIN
    LOCAL Count&
    LIB_InitColors
    LIB_InitFonts
    ShowDialog_Form1 0
    DO
        DIALOG DOEVENTS TO Count&
    LOOP UNTIL Count&=0
    LIB_DeleteBrushes
END FUNCTION
'
' *************************************************************
'                    Application Dialogs (#3)
' *************************************************************
'
%ButtonRows    =    10
%ButtonCols    =    10
'
GLOBAL XRatio!, YRatio!
'
SUB SetAPIScale(BYVAL hDlg&, BYVAL IDNum&, BYVAL W&, BYVAL H&)
     LOCAL hCtrl&, R AS RECT
     CONTROL HANDLE hDlg&, IDNum& TO hCtrl&
     GetClientRect hCtrl&, R
     XRatio!=R.nRight/W&
     YRatio!=R.nBottom/H&
END SUB
FUNCTION API_X(BYVAL X&) AS LONG
     FUNCTION=XRatio!*X&
END FUNCTION
FUNCTION API_Y(BYVAL Y&) AS LONG
     FUNCTION=YRatio!*Y&
END FUNCTION
SUB DrawFakeButtons(BYVAL hDlg&, BYVAL IDNum&)
     LOCAL hCtrl&, R&, C&, X&, Y&, V1&, V2&, V3&, MyColor&, hDC&, RR AS RECT
     CONTROL HANDLE hDlg&, IDNum& TO hCtrl&
     GRAPHIC ATTACH hDlg&, IDNum&, REDRAW
     GRAPHIC SCALE (0,0) - (%ButtonRows*10,%ButtonCols*10)
     SetAPIScale hDlg&, IDNum&,%ButtonRows*10,%ButtonCols*10
     GRAPHIC GET DC TO hDC&
     FOR R&=1 TO %ButtonRows
          FOR C&=1 TO %ButtonCols
               ' draw button here
               X&=(C&-1)*10
               Y&=(R&-1)*10
               V1&=RND(32,255)
               V2&=RND(128,255)
               V3&=RND(32,255)
               MyColor&=RGB(V1&,V2&,V3&)
               RR.nLeft=API_X(X&)
               RR.nRight=RR.nLeft+API_X(10)
               RR.nTop=API_Y(Y&)
               RR.nBottom=RR.nTop+API_Y(10)
               DrawFrameControl hDC&, BYVAL VARPTR(RR), %DFC_BUTTON, %DFCS_BUTTONPUSH
               GRAPHIC BOX (X&+1,Y&+1)-(X&+9,Y&+9), 0, MyColor&, MyColor&
          NEXT C&
     NEXT R&
     GRAPHIC REDRAW
END SUB
SUB ShowDialog_Form1(BYVAL hParent&)
    LOCAL Style&, ExStyle&
    LOCAL N&, CT&        '  Variables used for Reading Data in Arrays for Listbox and Combobox
    '   hParent& = 0 if no parent Dialog
    Style& = %WS_POPUP OR %DS_MODALFRAME OR %WS_CAPTION OR %WS_MINIMIZEBOX OR %WS_SYSMENU OR %DS_CENTER
    ExStyle& = 0
    DIALOG NEW hParent&, "Your Dialog", 0, 0,  325,  266, Style&, ExStyle& TO hForm1&
    CONTROL ADD GRAPHIC, hForm1&,  %FORM1_GRAPHIC1,  "", 8, 7, 309, 224
    DrawFakeButtons hForm1&, %FORM1_GRAPHIC1
    CONTROL ADD "Button", hForm1&,  %FORM1_RSBUTTON,  "Resort Fake Buttons", 227, 244, 91, 15, _
        %WS_CHILD OR %WS_VISIBLE OR %BS_PUSHBUTTON OR %WS_TABSTOP CALL CBF_FORM1_RSBUTTON
    DIALOG SHOW MODELESS hForm1& , CALL Form1_DLGPROC
END SUB
'
' *************************************************************
'                             Dialog Callback Procedure
'                             for Form Form1
'                             uses Global Handle - hForm1&
' *************************************************************
'
GLOBAL Original_Address AS DWORD
'
FUNCTION Graphic_SubClassProc(BYVAL hWnd&, BYVAL Msg&, BYVAL wParam&, BYVAL lParam&) AS LONG
     SELECT CASE Msg&
          CASE %WM_DESTROY
               SetWindowLong hWnd&, %GWL_WNDPROC, Original_Address
          CASE %WM_LBUTTONUP
               LOCAL X&, Y&, R&, C&, RR AS RECT, V&
               X&=LOWRD(lParam&)
               Y&=HIWRD(lParam&)
               GetClientRect hWnd&, RR
               R&=INT(Y&/INT(RR.nBottom/%ButtonRows))+1
               C&=INT(X&/INT(RR.nRight/%ButtonCols))+1
               MSGBOX "Button:  Row:"+STR$(R&)+" Column:"+STR$(C&)
          CASE ELSE
     END SELECT
     FUNCTION=CallWindowProc(Original_Address, hWnd&, Msg&, wParam&, lParam&)
END FUNCTION
'
CALLBACK FUNCTION Form1_DLGPROC
    LOCAL hCtrl&
    SELECT CASE CBMSG
        CASE %WM_INITDIALOG
               CONTROL HANDLE hForm1&,  %FORM1_GRAPHIC1 TO hCtrl&
               Original_Address=SetWindowLong(hCtrl&, %GWL_WNDPROC, CODEPTR(Graphic_SubClassProc))
        CASE ELSE
    END SELECT
END FUNCTION
'
' *******************************************************************
' *                         Library Code   *
' ********************************************************************
'
SUB LIB_InitFonts()
    REDIM App_Font(0 TO 5)
    App_Font(0)=GetStockObject(%SYSTEM_FONT)
    App_Font(1)=GetStockObject(%SYSTEM_FIXED_FONT)
    App_Font(2)=GetStockObject(%ANSI_VAR_FONT)
    App_Font(3)=GetStockObject(%ANSI_FIXED_FONT)
    App_Font(4)=GetStockObject(%DEFAULT_GUI_FONT)    ' MS Sans Serif
    App_Font(5)=GetStockObject(%OEM_FIXED_FONT)      ' Terminal Font
    ' Fonts 0 to 5 do not need to be deleted since they are System Fonts
END SUB
'
' -------------------------------------------------------------
'
SUB LIB_InitColors()
    DATA         0,  8388608,    32768,  8421376,      196,  8388736,    16512, 12895428
    DATA   8421504, 16711680,    65280, 16776960,      255, 16711935,    65535, 16777215
    DATA  10790052, 16752768, 10551200, 16777120, 10526975, 16752895, 10551295, 13948116
    DATA  11842740, 16768188, 14483420, 16777180, 14474495, 16768255, 14483455, 15000804
    LOCAL T&, RGBVal&
    REDIM App_Brush&(0 TO 31)
    REDIM App_Color&(0 TO 31)
    FOR T&=0 TO 31
        RGBVal&=VAL(READ$(T&+1))
        App_Brush&(T&)=CreateSolidBrush(RGBVal&)
        App_Color&(T&)=RGBVal&
    NEXT T&
END SUB
'
' -------------------------------------------------------------
'
SUB LIB_DeleteBrushes()
    LOCAL T&
    FOR T&=0 TO 31
        DeleteObject App_Brush&(T&)
    NEXT T&
END SUB
'
' ------------------------------------------------
'
CALLBACK FUNCTION CBF_FORM1_RSBUTTON
    IF CBCTLMSG=%BN_CLICKED THEN
          DrawFakeButtons hForm1&, %FORM1_GRAPHIC1
    END IF
END FUNCTION

By subclassing the Graphic control you cna test for button clicks.

[Christopher Becker]

Moving controls ?

Michael, thanks for the reply. You said, "Move the controls to their new position based on the new sort order and repainting is automatic."

Do you mean just another "CONTROL LABEL ADD" statement?

Let me show what I'm doing:

handle = LoadImage( "x.bmp", etc...)
CONTROL ADD LABEL, hDialog, xButtonID, xPos, yPos, etc...
CONTROL SEND hDialog, xButtonID, %STM_SETIMAGE, %IMAGE_BITMAP, handle

This draws the clickable "x.bmp" image at xPos, yPos. Now, if I want to keep everything the same, except move its position, can I just send another CONTROL ADD LABEL statement with new xPos, yPos? I played with that idea a little but could not get it to move. I even tried adding a CONTROL REDRAW statement. What am I missing?

These updates will be infrequent, so I'm not worried about flicker.

[Michael Mattias]

Not a DDT guy but I'm sure there is some kind of "CONTROL MOVE" command.....

MCM

[Christopher Becker]

Rtfm...

Michael, you're right. It's CONTROL SET LOC hDlg, id&, x&, y&

Couldn't be easier. Sorry I missed it. Usually I exhaust the Help Screens before posting here. Thanks for the point.

[Christopher Becker]

I just realized I posted this PBWin question in the Console Compiler forum. Sorry, guys, sick pregnant wife and sick 5-year old mean no sleep for me!

[Michael Mattias]

>It's CONTROL SET LOC

I kind of like the sound of 'CONTROL MOVE' better.

[Rodney Hicks]

I want to refresh the dialog screen because the button images need to be in a re-sorted order.

DIALOG REDRAW

Rod

[StanHelton]

>It's CONTROL SET LOC

I kind of like the sound of 'CONTROL MOVE' better.

MACRO CONTROL MOVE = CONTROL SET LOC

[Michael Mattias]

>MACRO CONTROL MOVE = CONTROL SET LOC