User talk:BrianO

<lang purebasic>;There are no hard feelings.

Thank you for your code sample, it seems like it will be useful

I modified your sample and provide you with the updated code if it might benefit you.

The changes address a few simple things that I found helpful

It allows negative selections, i.e. making a click and then moving left or up from the click to outline the selection.

It removes the toggling of buttons when they served no apparent purpose (namely the 'new' button but also resetting the 'snapit' button).

Uses the CanvasGadget for it's more robust event handling (instead of an image gadget).

Addresses one small issue when the 'snapit' button is displayed. If a click was made on the image a new selection was started.

That is now prevented by requiring the 'snapit' button to be toggled off so that the desktop image is displayed to allow captures to take place.

All other changes are simply formatting (no offense intended) and many occur simply by virtue of the IDE (jaPBe) that I use.

Enumeration

 #ButtonMakeScreenShot
 #ButtonMakeNewScreenShot
 #CanvasScreenShot
 #ImageFullScreenShot = 0
 #ImageHalfScreenShot
 #ImageTempScreenShot
 #ImageSelectedArea

EndEnumeration

Procedure.i MakeDesktopScreenshot(ImageNr, x, y, width, height)

 hImage = CreateImage(ImageNr, width, height)
 hDC    = StartDrawing(ImageOutput(ImageNr))
   DeskDC = GetDC_(GetDesktopWindow_())
   BitBlt_(hDC, 0, 0, width, height, DeskDC, x, y, #SRCCOPY)
 StopDrawing()
 ReleaseDC_(GetDesktopWindow_(), DeskDC)
 ProcedureReturn hImage

EndProcedure

Procedure.s formatTitle(x, y, zoom)

 ProcedureReturn Str(x * zoom) + "|" + Str(y * 2) + "|"

EndProcedure

Procedure filterCallback(x, y, sourceColor, targetColor)

 If (x % 16 < 8 And y % 16 < 8) Or (x % 16 > 7 And y % 16 > 7)
   ProcedureReturn RGBA(192, 192, 192, 255)
 Else
   ProcedureReturn RGBA(255, 255, 255, 255)
 EndIf 

EndProcedure

Style = #PB_Window_SystemMenu | #PB_Window_MinimizeGadget | #PB_Window_ScreenCentered

LoadFont(0, "tahoma", 9, #PB_Font_HighQuality | #PB_Font_Bold) SetGadgetFont(#PB_Default, FontID(0))

ExamineDesktops(): dtw = DesktopWidth(0): dth = DesktopHeight(0) w = dtw / 2: h = dth / 2

MakeDesktopScreenshot(#ImageFullScreenShot, 0, 0, dtw, dth) CopyImage(#ImageFullScreenShot, #ImageHalfScreenShot) ResizeImage(#ImageHalfScreenShot, w, h)

OpenWindow(0, 0, 0, w, h + 20, "", Style): StickyWindow(0, 1) ButtonGadget(#ButtonMakeNewScreenShot, w - 200, h, 100, 20, "New") ButtonGadget(#ButtonMakeScreenShot, w - 100, h, 100, 20,"SnipIt", #PB_Button_Toggle) CanvasGadget(#CanvasScreenShot, 0, 0, w, h) SetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_Image, ImageID(#ImageHalfScreenShot))

StopSelecting=#True Repeat

 msg = WaitWindowEvent()
 gid = EventGadget()
 etp = EventType()
 
 Select msg
   Case #PB_Event_CloseWindow
     End
   Case #PB_Event_Gadget
     Select gid
       Case #ButtonMakeNewScreenShot
         HideWindow(0, 1)
         sleep_(200)
         MakeDesktopScreenshot(#ImageFullScreenShot, 0, 0, dtw, dth)
         CopyImage(#ImageFullScreenShot, #ImageHalfScreenShot)
         ResizeImage(#ImageHalfScreenShot, w, h)
         SetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_Image, ImageID(#ImageHalfScreenShot))
         HideWindow(0, 0)
         SetGadgetState(#ButtonMakeScreenShot, 0)
         
       Case #ButtonMakeScreenShot
         Select GetGadgetState(#ButtonMakeScreenShot)
           Case 0
             SetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_Image, ImageID(#ImageHalfScreenShot))
           Case 1
             SetWindowTitle(0, formatTitle(x1, y1, 2) + formatTitle(sw, sh, zoom)  + " - " + formatTitle(x1, y1, 2) + formatTitle(sw, sh, zoom))
             GrabImage(#ImageFullScreenShot, #ImageSelectedArea, x1 * 2 - 2, y1 * 2 - 2, sw * 2, sh * 2)
             SetClipboardImage(#ImageSelectedArea)
             CreateImage(#ImageTempScreenShot, w, h)
             StartDrawing(ImageOutput(#ImageTempScreenShot))
               DrawingMode(#PB_2DDrawing_CustomFilter)      
               CustomFilterCallback(@filterCallback())
               Box(0, 0, w, h, RGB(212, 208, 200))
               DrawingMode(#PB_2DDrawing_Default)
               DrawImage(ImageID(#ImageSelectedArea), 0, 0)
             StopDrawing()
             SetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_Image, ImageID(#ImageTempScreenShot))
         EndSelect
       Case #CanvasScreenShot
         Select etp
           Case #PB_EventType_LeftButtonUp
             StopSelecting = #True
           Case #PB_EventType_MouseMove
             If Not StopSelecting
               xi = GetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_MouseX)
               yi = GetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_MouseY)
               If xi < 0: xi = 0: EndIf
               If xi > w: xi = w: EndIf
               If yi < 0: yi = 0: EndIf
               If yi > h: yi = h: EndIf
               
               x1 = xi: x2 = x0
               If x2 < x1
                 Swap x2, x1
               EndIf 
               y1 = yi: y2 = y0
               If y2 < y1
                 Swap y2, y1
               EndIf
               sw = x2 - x1
               sh = y2 - y1
               
               SetWindowTitle(0, formatTitle(x1, y1, 2) + formatTitle(sw, sh, zoom))
               
               SetGadgetState(#CanvasScreenShot, ImageID(#ImageHalfScreenShot))
               CopyImage(#ImageHalfScreenShot, #ImageTempScreenShot)
               StartDrawing(ImageOutput(#ImageTempScreenShot))
                 DrawingMode(#PB_2DDrawing_XOr | #PB_2DDrawing_Outlined)
                 Box(x1, y1, sw, sh, $FFFFFF)
               StopDrawing()
               SetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_Image, ImageID(#ImageTempScreenShot))
             EndIf
           Case #PB_EventType_LeftButtonDown
             If StopSelecting = #True And GetGadgetState(#ButtonMakeScreenShot) = 0
               x0 = GetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_MouseX)
               y0 = GetGadgetAttribute(#CanvasScreenShot, #PB_Canvas_MouseY)
               SetWindowTitle(0, formatTitle(x0, y0, 2))
               StopSelecting = #False
             EndIf 
         EndSelect
     EndSelect
 EndSelect

ForEver</lang> --Demivec 21:44, 27 August 2012 (UTC)