Changing focus

[Mark Buehnerkemper]

When a graphics window gains focus directly from the user via mouse click or alt-tab switching, is there a simple way to automatically shift the focus over to the console window?

Thanks,

Mark

[Mark Hunter]

Console Set Focus

[Mark Buehnerkemper]

Thanks, Mark, but I'm afraid I wasn't quite clear enough.

I use CONSOLE SET FOCUS quite a bit, but the program (console) doesn't always know when it is needed.

My current application has a graphics window that is scaled to fill the screen. The console is still active and receiving input from the keyboard, but is positioned off of the visible desktop.

While the console is waiting for keyboard input, the user may click the mouse in the graphics window, thus changing focus to the graphics window. That's when I need to call CONSOLE SET FOCUS.

I could simply continue to call CONSOLE SET FOCUS repeatedly as the program runs, but then the user wouldn't be able to run other applications without the console taking the focus back.

I'm really looking for a way for the program to be able to recognize which window has focus, and use CONSOLE SET FOCUS each time the subordinate graphics window gets a mouse click or is activated using alt-tab switching.

Thanks,

Mark

[Guy Dombrowski]

Console focus

Mark,

Get yourself a copy of Console Tools from Perfect Sync

[Pierre Bellisle]

Mark,
Is this what you have in mind ?

#COMPILE EXE '#CC 4.04#
#DIM ALL
#INCLUDE "Win32Api.inc" '#2005-01-27#
 
FUNCTION PBMAIN () AS LONG
 LOCAL DesktopRc   AS RECT
 LOCAL hWin        AS DWORD
 LOCAL sKey        AS STRING
 
 SystemParametersInfo %SPI_GETWORKAREA, 0, BYVAL VARPTR(DesktopRc), 0
 GRAPHIC WINDOW "Window", DesktopRc.nLeft, DesktopRc.nTop, DesktopRc.nRight, DesktopRc.nBottom TO hWin
 GRAPHIC ATTACH hWin, 0
 
 STDOUT "Focus always set to console and not to graphic window."
 STDOUT "Console can be minimized."
 STDOUT "Type Escape to end"
 DO
   IF GetForeGroundWindow = hWin THEN CONSOLE SET FOCUS
   IF IsIconic(CONSHNDL) THEN
     ShowWindow hWin, %SW_HIDE
   ELSE
     ShowWindow hWin, %SW_SHOW
   END IF
   sKey = INKEY$
   IF LEN(sKey) THEN STDOUT sKey;
   SLEEP 50
 LOOP UNTIL sKey = $ESC
 
END FUNCTION

[Mark Buehnerkemper]

Beautiful!

That's exactly what I'm looking for. Thanks Much Pierre.

Is there also a simple way to hide the mouse cursor until there is mouse movement? Or better yet, do you have a good reference for API calls so I can figure this out for myself!

Guy... Thanks for your suggestion.

I've looked at Console Tools, but do so little programming that didn't feel it would be a reasonable investment. This project is a rewrite from a PB3.5 program that I use daily in my work, and I have only gone back to programming after several years because the program has issues with newer graphics hardware. I'm having a blast with programming again, though, and may make the investment if I come up with more projects.

Mark

[Mark Hunter]

The console is still active and receiving input from the keyboard, but is positioned off of the visible desktop.

Sounds like you’re using the console just to capture keyboard activity.
Since you must already be subclassing so that the graphic window captures mouse activity, it’s also capturing keyboard activity. Couldn't you check for Case %WM_KEYDOWN or Case %WM_KEYUP and dispense with the console entirely (#Console Off)?

[Mark Buehnerkemper]

You're correct, I'm using the console for keyboard input, but at times do move the console into view for user input.

Being new to PBCC, I'm not familiar with Case %WM_KEYDOWN or Case %WM_KEYUP and cant find them in the PBCC help system. Are these API calls?

[Mark Hunter]

They’re Windows “messages” instead of API calls.

I see that I misunderstood you when you wrote
“the user may click the mouse in the graphics window, thus changing focus to the graphics window.”
I took that to mean you were capturing the mouse, but you’re not.

It’s possible to capture mouse and keyboard activity in a graphic window. (I seem to be posting a lot about this, but obviously this is useful.) The following is a very simple example.

' Compiler: PBCC 4.04 (not 4.03)

#Dim All
'-----------------------------------------------------------------

Macro False = 0
Macro True = -1
Macro Boolean = Long
'-----------------------------------------------------------------

'From WinAPI
%WM_KEYDOWN = &H100
%WM_KEYUP = &H101
%GWL_WNDPROC = -4

%VK_OEM_COMMA = &HBC
%VK_OEM_PERIOD = &HBE

%WM_NCHITTEST = &H084
%HTTRANSPARENT = -1
%WM_LBUTTONDOWN = &H201
%WM_RBUTTONDOWN = &H204
%WM_LBUTTONUP = &H202
%WM_RBUTTONUP = &H205
%GW_CHILD = 5
%HTCLIENT = 1

Declare Function GetWindow Lib "USER32.DLL" Alias "GetWindow" (ByVal Wnd As Dword, ByVal wCmd As Dword) As Long
Declare Function CallWindowProc Lib "USER32.DLL" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Dword, ByVal Wnd As Dword, ByVal uMsg As Dword, ByVal param As Dword, ByVal mousepos As Long) As Long
Declare Function SetWindowLong Lib "USER32.DLL" Alias "SetWindowLongA" (ByVal Wnd As Dword, ByVal nIndex As Long, ByVal lNewLong As Long) As Long
'=================================================================

%esc = 27 ' ascii keycode for escape key
%leftbutton = 1 'arbitrary whichbutton values
%rightbutton = -1
%nobutton = 0
'-----------------------------------------------------------------

Declare Function GWnew(ByVal Dword, ByVal Dword, ByVal Dword, ByVal Long) As Long
Declare Function InStat1 As Long
Declare Function InKey1 As Long
Declare Sub StuffKey(ByVal Long)
Declare Sub Getkey
Declare Sub MouseClick(ByVal Long)
'-----------------------------------------------------------------

Global GW, GWold As Dword 'handles
Global win1 As Dword 'handle for window
Global keybuff() As Long 'keycode buffer
Global nkey As Long 'number of keys in keycode buffer
Global whichbutton As Long 'which mouse button
Global Xmouse, Ymouse As Long '(not used in this example code)
Global exitcode As Long
'-----------------------------------------------------------------

Sub MouseClick(ByVal whichbutton As Boolean)
If whichbutton = %leftbutton Then
Print "Left button at ";Xmouse;Ymouse
Else '%rightbutton
Print "Right button at ";Xmouse;Ymouse
End If
End Sub

Sub keyPress(ky As Long)
If ky = Asc($Cr) Then
Print
Else
Print Chr$(ky);
End If
End Sub
'-----------------------------------------------------------------

Function GWnew (ByVal Wnd As Dword, ByVal Msg As Dword, ByVal param As Dword, ByVal mousepos As Long) As Long
Local result As Long

result = CallWindowProc (GWold, Wnd, Msg, param, mousepos)

Select Case Long Msg
Case %WM_NCHITTEST
If result = %HTTRANSPARENT Then result = %HTCLIENT

Case %WM_LBUTTONDOWN
whichbutton = %leftbutton
Xmouse = Lo(Word,mousepos) :Ymouse = Hi(Word,mousepos)
Case %WM_LBUTTONUP
whichbutton = %nobutton
Xmouse = Lo(Word,mousepos) :Ymouse = Hi(Word,mousepos)
MouseClick %leftbutton

Case %WM_RBUTTONDOWN
whichbutton = %rightbutton
Xmouse = Lo(Word,mousepos) :Ymouse = Hi(Word,mousepos)
Case %WM_RBUTTONUP
whichbutton = %nobutton
Xmouse = Lo(Word,mousepos) :Ymouse = Hi(Word,mousepos)
MouseClick %rightbutton

Case %WM_KEYDOWN
If param = %esc Then exitcode = true
KeyPress Param 'always uppercase

End Select

Function = result
End Function
'-----------------------------------------------------------------

Function PBMain
Local GW As Dword

Graphic Window "", 0,0, 400, 400 To win1 'create graphic window
Graphic Attach win1, 0, ReDraw
Graphic Set Focus
Console Set Loc 400, 0

GW = GetWindow(win1, %GW_CHILD) 'subclass
GWold = SetWindowLong(GW, %GWL_WNDPROC, CodePtr(GWnew))

whichbutton = %nobutton

Graphic Print " Press Esc to quit.
Graphic ReDraw

Do
If exitcode Then Exit Function
Sleep 0
Loop
End Function

For a more realistic example, involving only the keyboard, see the second post of

http://powerbasic.com/support/pbforums/showthread.php?p=270088#post270088

For a complicated example, involving both the keyboard and mouse, see

http://powerbasic.com/support/pbforums/showthread.php?t=35575

You can strip out the mouse-repeat part if you don't need it.