Scrollbar and Bitmap

[Urs Gysler]

hi folks
I'am a new in the forum an I would like to say hello to You.
I live in Switzerland and work in a ordinary office an do some easy "programming". To be honest, i mainly use PB Forms and put some code afterwards in.

I'have been using Powerbasic 8.01 and PowerbasicForms 1.51 for about 2 years.
There is a big problem, that i cannot solve. Never found a proper sample somewhere, that exactly solved my big problem. Maybe there is someone of you, who can help me.
1)
I would like to show a Bitmap in a resizable window, that has the horizontal and vertical scrollbars.
2)
The Bitmap comes "out of a ressource file". (I know how to put that BMP in that ressource file.
How can I show that bitmap?
How can I use the scrollbars, hiding when the are not used and the Bitmap fits in to that window or showing them when the Bitmap is bigger than the surrounding window itself.

I am not able to solve that problem, it bothers me for such a long time.
I would lik to make a simple Infoprogram, containing a map of certain regions from the first world war.
But I cannot start with that project when im not able to solve the main problem.
I hope someone of you can help me, please.

[Dave Biggs]

Hi Urs,

Here are a couple of links that might get you started...
http://www.powerbasic.com/support/fo...ML/000831.html -Second post.
http://www.powerbasic.com/support/fo...ML/013831.html
http://www.powerbasic.com/support/fo...ML/002629.html
Plus one more for good measure
http://www.powerbasic.com/support/fo...ML/000743.html

[Urs Gysler]

Scrollbar and Bitmap

Hi Urs,

Here are a couple of links that might get you started...
http://www.powerbasic.com/support/fo...ML/000831.html -Second post.
http://www.powerbasic.com/support/fo...ML/013831.html
http://www.powerbasic.com/support/fo...ML/002629.html
Plus one more for good measure
http://www.powerbasic.com/support/fo...ML/000743.html

Hi Dave
I've tested the Sample-Programs profided with your links. They are great, Most I like the one with the rotating Bitmap. For the things i'd like to do is the last one, that can be resized to fullscreen and has the red boxes. One can even zoom in and out. There is still ohne question. Can I append a Bitmap FROM A RESSOURCE-FILE to that grafic-window? Is that possible?

Have a nice day an thanks again.

[Dave Biggs]

Here's a modified version of one of Seme's posts which uses a Bitmap from a resource file..

 'TT Jules and Semen: http://www.powerbasic.com/support/fo...ML/000743.html
#Compile Exe
#Dim All
#Register None
#Include "WIN32API.INC"
#Resource "ScrollBmpTest.pbr"         ' See .rc file below
 
%IDR_IMGFILE1 = 102
%BTN_BUTTON1  = 103
'------------------/
 
CallBack Function DlgProc1
  Select Case CbMsg
    Case %WM_INITDIALOG
      Static hDlg2 As Long, siSz As POINTAPI, siPg As POINTAPI, siLn As POINTAPI
 
      Dialog New CbHndl, "", 0, 0, 700, 600, %WS_CHILD Or %WS_CLIPCHILDREN To hDlg2  ' Image window
      Control Add ImageX, hDlg2, %IDR_IMGFILE1, "#" + Format$(%IDR_IMGFILE1), 0, 0, 710, 630
 
      Dialog Show Modeless hDlg2
 
      Dim rc1 As RECT, rc2 As RECT
      GetClientRect CbHndl, rc1
      siPg.X = rc1.nRight - rc1.nLeft
      siPg.Y = rc1.nBottom - rc1.nTop
 
      GetWindowRect hDlg2, rc2
      siSz.X = rc2.nRight - rc2.nLeft
      siSz.Y = rc2.nBottom - rc2.nTop
 
      siLn.X = 0.1 * siPg.X ' 10% of page
      siLn.Y = 0.1 * siPg.Y ' 10% of page
 
      Static siX As SCROLLINFO, siY As SCROLLINFO
      siX.cbsize = SizeOf(siX)
      siX.nMin = 0
      siX.nPage = siPg.X
      siX.fMask =  %SIF_RANGE Or %SIF_PAGE
      siX.nMax = siSz.X
      SetScrollInfo CbHndl, %SB_HORZ, siX, %False
 
      siY = siX
      siY.nPage = siPg.Y
      siY.nMax = siSz.Y
      SetScrollInfo CbHndl, %SB_VERT, siY, %False
 
    Case %WM_HSCROLL
      Local siRefresh As Long
      Select Case LoWrd(CbWparam)
        Case %SB_LINELEFT   : siX.nPos = siX.nPos - siLn.X: siRefresh = 1
        Case %SB_LINERIGHT  : siX.nPos = siX.nPos + siLn.X: siRefresh = 1
        Case %SB_PAGELEFT   : siX.nPos = siX.nPos - siPg.X: siRefresh = 1
        Case %SB_PAGERIGHT  : siX.nPos = siX.nPos + siPg.X: siRefresh = 1
        Case %SB_THUMBTRACK : siX.nPos = HiWrd(CbWparam)
        Case Else           :  Exit Function
      End Select
      siX.nPos = Max(siX.nPos, 0): siX.nPos = Min(siX.nPos, siSz.X - siPg.X)
      siX.fMask = %SIF_POS
      SetScrollInfo CbHndl, %SB_HORZ, siX, siRefresh
      SetWindowPos hDlg2, 0, -siX.nPos, -siY.nPos, 0, 0, %SWP_NOSIZE Or %SWP_NOZORDER Or %SWP_NOACTIVATE
      'SetWindowText GetParent(CbHndl), "PosX =" + Str$(siX.nPos) + " PosY =" + Str$(siY.nPos) + " (pixels)"
 
    Case %WM_VSCROLL
      Select Case LoWrd(CbWparam)
        Case %SB_LINEUP     : siY.nPos = siY.nPos - siLn.Y: siRefresh = 1
        Case %SB_LINEDOWN   : siY.nPos = siY.nPos + siLn.Y: siRefresh = 1
        Case %SB_PAGEUP     : siY.nPos = siY.nPos - siPg.Y: siRefresh = 1
        Case %SB_PAGEDOWN   : siY.nPos = siY.nPos + siPg.Y: siRefresh = 1
        Case %SB_THUMBTRACK : siY.nPos = HiWrd(CbWparam)
        Case Else           : Exit Function
      End Select
      siY.nPos = Max(siY.nPos, 0): siY.nPos = Min(siY.nPos, siSz.Y - siPg.Y)
      siY.fMask = %SIF_POS
      SetScrollInfo CbHndl, %SB_VERT, siY, siRefresh
      SetWindowPos hDlg2, 0, -siX.nPos, -siY.nPos, 0, 0, %SWP_NOSIZE Or %SWP_NOZORDER Or %SWP_NOACTIVATE
      'SetWindowText GetParent(CbHndl), "PosX =" + Str$(siX.nPos) + " PosY =" + Str$(siY.nPos) + " (pixels)"
 
    CASE %WM_MOUSEWHEEL
     LOCAL zDelta AS INTEGER
      zDelta = HIWRD(CbWparam)
 
      IF (LOWRD(CbwParam) AND %MK_CONTROL) = %MK_CONTROL THEN   'horizontal scroll
        IF zDelta > 0 THEN                                      'scroll to the left
          SendMessage CbHndl, %WM_HSCROLL, MAKLNG(%SB_LINELEFT, 0), 0
        ELSE                                                    'scroll to the right
          SendMessage CbHndl, %WM_HSCROLL, MAKLNG(%SB_LINERIGHT, 0), 0
        END IF
      ELSE                                                      'vertical scroll
        IF zDelta > 0 THEN                                      'scroll upwards
          SendMessage CbHndl, %WM_VSCROLL, MAKLNG(%SB_LINEUP, 0), 0
        ELSE                                                    'scroll downwards
          SendMessage CbHndl, %WM_VSCROLL, MAKLNG(%SB_LINEDOWN, 0), 0
        END IF
      END IF
 
   End Select
End Function 
'------------------/
 
CallBack Function DlgProc
  Select Case CbMsg
    Case %WM_INITDIALOG
      Local hDlg1 As Long
      Dialog New CbHndl, "", 10, 10, 280, 280, %WS_CHILD Or %WS_VISIBLE Or %WS_CLIPCHILDREN Or _
        %WS_HSCROLL Or %WS_VSCROLL, %WS_EX_CLIENTEDGE Or %WS_VSCROLL To hDlg1   ' Scroll Container
      Dialog Show Modeless hDlg1  Call DlgProc1
  End Select
End Function 
'------------------/
 
Function PbMain
 Local hDlg As Long
  Dialog New 0,"Scroll Bmp Test",,, 300, 300, %WS_CAPTION Or %WS_SYSMENU Or %WS_CLIPSIBLINGS To hdlg
  Dialog Show Modal hdlg Call DlgProc
End Function 
'------------------/
 
#If 0
//Bitmap Resource File - ScrollBmpTest.rc
#define IDR_IMGFILE1  102
IDR_IMGFILE1  BITMAP DISCARDABLE "C:\Windows\Gone Fishing.bmp"
#ENDIF