Windows Mouse

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SoCoder -> Snippet Home -> Misc

Teasy	Created : 21 August 2007 System : Windows Language : Blitz Windows Mouse Locked, protected and relative mouse positioning in a window.
Use this to use go around Blitz' mouse system and acquire the Windows' mouse data directly. This was written to overcome the scale-bug in Blitz3D, when running in a scaled window. It works both in fullscreen and windowed mode. For a demonstration, see the bottom function. ;------------------------------------------------------------------------------- ; * WinMouse - Locked, protected and relative mouse positioning in a window ; Version 04 Mar 2007 ; Created by Teasy <TheChange@yahoo.com> ;------------------------------------------------------------------------------- ; UserLibs: ; user32.decls ; .lib "user32.dll" ; api_GetCursorPos( pt* ) : "GetCursorPos" ;------------------------------------------------------------------------------- Include "\Dev\Blitz\Lib\WindowHandling.BB" ; more api calls Type Point2D Field X,Y End Type Type WinMouse_Object Field Pos.Point2D Field LastCall ; time last called update (for calibration) Field CenterX,CenterY ; center of screen (calibrated) Field MouseX,MouseY ; current in-window mouse position Field DeskW,DeskH ; desktop dimensions End Type Global WinMouse.WinMouse_Object Function WinMouse_Init() WinMouse = New WinMouse_Object WinMouse\Pos = New Point2D ; put 1 minute in the past WinMouse\LastCall = MilliSecs() - 60000 ; calibrate center WinMouse_Update ; set blitz cursor to center WinMouse\MouseX = GraphicsWidth()/2 WinMouse\MouseY = GraphicsHeight()/2 ; obtain desktop dimensions WinMouse\DeskW = DesktopWidth() WinMouse\DeskH = DesktopHeight() End Function Function WinMouse_Exit() Delete WinMouse\Pos Delete WinMouse End Function Function WinMouse_Update( AbsOnly = True , IdleTime = 500 ) ; Param AbsOnly ; True: Update only Windows mouse position ; ; False: Locked mouse motion ; Param IdleTime ; Amount of ms before recalibrating ; ; when not calling this function. Local MilliSecs ; number of ms since boot Local GraphicsWidth ; blitz window dimensions Local GraphicsHeight Local SpeedX#,SpeedY# ; mouse speed factor (for different window sizes) ; Note: calibration is required when the window size changes. ; You can manually calibrate using WinMouse_Calibrate, ; or using an IdleTime of 0 or below. If Not AbsOnly ; precall MilliSecs = MilliSecs() GraphicsWidth = GraphicsWidth() GraphicsHeight = GraphicsHeight() ; last call was longer than 0.5 second ago If MilliSecs - WinMouse\LastCall >= IdleTime ; recalibrate mouse center ; - center on screen MoveMouse GraphicsWidth/2,GraphicsHeight/2 ; - obtain absolute mouse position api_GetCursorPos WinMouse\Pos ; - store it WinMouse\CenterX = WinMouse\Pos\X WinMouse\CenterY = WinMouse\Pos\Y EndIf ; update time of call WinMouse\LastCall = MilliSecs EndIf ; get only the position If AbsOnly ; retrieve only the absolute mouse position api_GetCursorPos WinMouse\Pos ; move a virtual mouse while locking the real one (protected) Else ; detect mouse motion ; - retrieve absolute mouse position (again) api_GetCursorPos WinMouse\Pos ; - position the mouse center of window MoveMouse GraphicsWidth/2,GraphicsHeight/2 ; - check distance travelled (with calibrated center) ; and add it to the current position. ; WinMouse\MouseX = WinMouse\MouseX + ( WinMouse\Pos\X - WinMouse\CenterX ) ; WinMouse\MouseY = WinMouse\MouseY + ( WinMouse\Pos\Y - WinMouse\CenterY ) ; Now using desktop / active window dimensions to scale the motion ; to keep the mouse movement speed (sensivity) ; the same for any window size SpeedX = Float WinMouse\DeskW / Float ActiveWindowWidth() SpeedY = Float WinMouse\DeskH / Float ActiveWindowHeight() WinMouse\MouseX = WinMouse\MouseX + Float ( WinMouse\Pos\X - WinMouse\CenterX ) * SpeedX;/2 WinMouse\MouseY = WinMouse\MouseY + Float ( WinMouse\Pos\Y - WinMouse\CenterY ) * SpeedY;/2 ; - limit position to screen boundaries If WinMouse\MouseX < 0 Then WinMouse\MouseX = 0 If WinMouse\MouseX >= GraphicsWidth Then WinMouse\MouseX = GraphicsWidth-1 If WinMouse\MouseY < 0 Then WinMouse\MouseY = 0 If WinMouse\MouseY >= GraphicsHeight Then WinMouse\MouseY = GraphicsHeight-1 EndIf End Function ; force calibration (in case the window size is changed within the idle time) Function WinMouse_Calibrate() ; recalibrate mouse center ; - center on screen MoveMouse GraphicsWidth()/2,GraphicsHeight()/2 ; - obtain absolute mouse position api_GetCursorPos WinMouse\Pos ; - store it WinMouse\CenterX = WinMouse\Pos\X WinMouse\CenterY = WinMouse\Pos\Y End Function ;------------------------------------------------------------------------------- ; Demonstration Function WinMouse_Demo() WinMouse_Init Local sx = 320 Local sy = 240 Graphics sx,sy , 0,3 SetBuffer BackBuffer() SetFont LoadFont( "Arial" , 15 , True ) Repeat WinMouse_Update KeyDown( 57 ) If KeyHit( 28 ) FlushKeys WaitKey FlushKeys EndIf Cls Color 255,192,128 Rect WinMouse\MouseX-10,WinMouse\MouseY-10 , 20,20 , False Rect WinMouse\MouseX- 3,WinMouse\MouseY- 3 , 6, 6 , True Color 128,192,255 Text 16,16 , "(Blitz) Mouse: ("+MouseX() +","+ MouseY()+")" Text 16,32 , "(Windows) Mouse: ("+WinMouse\Pos\X+","+WinMouse\Pos\Y+")" Text 16,48 , "(WinMouse) Mouse: ("+WinMouse\MouseX+","+WinMouse\MouseY+")" Text 16,64 , "(Center) Mouse: ("+WinMouse\CenterX+","+WinMouse\CenterY+")" Flip Until KeyHit( 1 ) WinMouse_Exit End End Function ;winmouse_demo --v

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