窗口滚动条真难啊

xiaoy

一直闹不明白窗口水平或垂直滚动条是怎么实现的，好像光用样式没什么用，看了一些朋友类似的帖，发现一个也看不明白，我现在只想实现一个简单点的，如：一个固定窗口，建个图片控件，图片大于窗口客户区，如何实现滚动条？？

xiaoy

为什么看上去很简单的事情，autoit要搞这么复杂

yhxhappy

LZ看看关于 _GUIScrollBars_Init 的帮助吧，要实现你要的效果应该不难
下面代码里的滚动条都是人为创造出来的，和窗口样式无关

#AutoIt3Wrapper_au3check_parameters=-d -w 1 -w 2 -w 3 -w 4 -w 5 -w 6
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <StructureConstants.au3>
#include <GUIScrollBars.au3>
#include <ScrollBarConstants.au3>

Opt("MustDeclareVars", 1)

_Main()

Func _Main()
        Local $nFileMenu, $nExititem, $GUIMsg, $hGUI, $h_cGUI, $h_cGUI2
        Local $listview, $button

        $hGUI = GUICreate("ScrollBar Example", 400, 400, -1, -1, BitOR($WS_MINIMIZEBOX, $WS_CAPTION, $WS_POPUP, $WS_SYSMENU, $WS_SIZEBOX))
        GUISetBkColor(0x88AABB)
        
        $nFileMenu = GUICtrlCreateMenu("File")
        $nExititem = GUICtrlCreateMenuItem("Exit", $nFileMenu)
        $listview = GUICtrlCreateListView("col1  |col2|col3  ", 10, 10, 200, 150);,$LVS_SORTDESCENDING)
        $button = GUICtrlCreateButton("Value?", 75, 170, 70, 20)
        GUICtrlSetResizing($button, $GUI_DOCKALL)
        For $x = 1 To 30
                GUICtrlCreateListViewItem("item" & $x & "|col2|col3", $listview)
        Next
        GUICtrlSetResizing($listview, $GUI_DOCKALL)
        
        $h_cGUI = GUICreate("Child GUI", 200, 200, 10, 200, $WS_CHILD, $WS_EX_CLIENTEDGE, $hGUI)
        GUICtrlCreateButton("a button", 10, 10, 90, 20)
        GUISetBkColor(0X006400)
        GUISetState()
        GUICtrlSetResizing($h_cGUI, $GUI_DOCKALL)

        GUISwitch($hGUI)

        $h_cGUI2 = GUICreate("Child GUI", 200, 200, 215, 10, $WS_CHILD, $WS_EX_CLIENTEDGE, $hGUI)
        GUICtrlCreateButton("a button", 10, 10, 90, 20)
        GUISetBkColor(0X006400)
        GUISetState()
        GUICtrlSetResizing($h_cGUI2, $GUI_DOCKALL)

        GUISwitch($hGUI)

        GUIRegisterMsg($WM_SIZE, "WM_SIZE")
        GUIRegisterMsg($WM_VSCROLL, "WM_VSCROLL")
        GUIRegisterMsg($WM_HSCROLL, "WM_HSCROLL")
        
        GUISetState()

        _GUIScrollBars_Init($hGUI)
        _GUIScrollBars_Init($h_cGUI)

        While 1
                $GUIMsg = GUIGetMsg()

                Switch $GUIMsg
                        Case $GUI_EVENT_CLOSE, $nExititem
                                ExitLoop
                EndSwitch
        WEnd

        Exit
EndFunc   ;==>_Main

Func WM_SIZE($hWnd, $Msg, $wParam, $lParam)
        #forceref $Msg, $wParam
        Local $index = -1, $yChar, $xChar, $xClientMax, $xClient, $yClient, $ivMax
        For $x = 0 To UBound($aSB_WindowInfo) - 1
                If $aSB_WindowInfo[$x][0] = $hWnd Then
                        $index = $x
                        $xClientMax = $aSB_WindowInfo[$index][1]
                        $xChar = $aSB_WindowInfo[$index][2]
                        $yChar = $aSB_WindowInfo[$index][3]
                        $ivMax = $aSB_WindowInfo[$index][7]
                        ExitLoop
                EndIf
        Next
        If $index = -1 Then Return 0

        Local $tSCROLLINFO = DllStructCreate($tagSCROLLINFO)
        
        ; Retrieve the dimensions of the client area.
        $xClient = BitAND($lParam, 0x0000FFFF)
        $yClient = BitShift($lParam, 16)
        $aSB_WindowInfo[$index][4] = $xClient
        $aSB_WindowInfo[$index][5] = $yClient
        
        ; Set the vertical scrolling range and page size
        DllStructSetData($tSCROLLINFO, "fMask", BitOR($SIF_RANGE, $SIF_PAGE))
        DllStructSetData($tSCROLLINFO, "nMin", 0)
        DllStructSetData($tSCROLLINFO, "nMax", $ivMax)
        DllStructSetData($tSCROLLINFO, "nPage", $yClient / $yChar)
        _GUIScrollBars_SetScrollInfo($hWnd, $SB_VERT, $tSCROLLINFO)
        
        ; Set the horizontal scrolling range and page size
        DllStructSetData($tSCROLLINFO, "fMask", BitOR($SIF_RANGE, $SIF_PAGE))
        DllStructSetData($tSCROLLINFO, "nMin", 0)
        DllStructSetData($tSCROLLINFO, "nMax", 2 + $xClientMax / $xChar)
        DllStructSetData($tSCROLLINFO, "nPage", $xClient / $xChar)
        _GUIScrollBars_SetScrollInfo($hWnd, $SB_HORZ, $tSCROLLINFO)

        Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_SIZE

Func WM_HSCROLL($hWnd, $Msg, $wParam, $lParam)
        #forceref $Msg, $lParam
        Local $nScrollCode = BitAND($wParam, 0x0000FFFF)

        Local $index = -1, $xChar, $xPos
        Local $Min, $Max, $Page, $Pos, $TrackPos

        For $x = 0 To UBound($aSB_WindowInfo) - 1
                If $aSB_WindowInfo[$x][0] = $hWnd Then
                        $index = $x
                        $xChar = $aSB_WindowInfo[$index][2]
                        ExitLoop
                EndIf
        Next
        If $index = -1 Then Return 0
        
;~         ; Get all the horizontal scroll bar information
        Local $tSCROLLINFO = _GUIScrollBars_GetScrollInfoEx($hWnd, $SB_HORZ)
        $Min = DllStructGetData($tSCROLLINFO, "nMin")
        $Max = DllStructGetData($tSCROLLINFO, "nMax")
        $Page = DllStructGetData($tSCROLLINFO, "nPage")
        ; Save the position for comparison later on
        $xPos = DllStructGetData($tSCROLLINFO, "nPos")
        $Pos = $xPos
        $TrackPos = DllStructGetData($tSCROLLINFO, "nTrackPos")
        #forceref $Min, $Max
        Switch $nScrollCode

                Case $SB_LINELEFT ; user clicked left arrow
                        DllStructSetData($tSCROLLINFO, "nPos", $Pos - 1)

                Case $SB_LINERIGHT ; user clicked right arrow
                        DllStructSetData($tSCROLLINFO, "nPos", $Pos + 1)

                Case $SB_PAGELEFT ; user clicked the scroll bar shaft left of the scroll box
                        DllStructSetData($tSCROLLINFO, "nPos", $Pos - $Page)

                Case $SB_PAGERIGHT ; user clicked the scroll bar shaft right of the scroll box
                        DllStructSetData($tSCROLLINFO, "nPos", $Pos + $Page)

                Case $SB_THUMBTRACK ; user dragged the scroll box
                        DllStructSetData($tSCROLLINFO, "nPos", $TrackPos)
        EndSwitch

;~    // Set the position and then retrieve it.  Due to adjustments
;~    //   by Windows it may not be the same as the value set.

        DllStructSetData($tSCROLLINFO, "fMask", $SIF_POS)
        _GUIScrollBars_SetScrollInfo($hWnd, $SB_HORZ, $tSCROLLINFO)
        _GUIScrollBars_GetScrollInfo($hWnd, $SB_HORZ, $tSCROLLINFO)
        ;// If the position has changed, scroll the window and update it
        $Pos = DllStructGetData($tSCROLLINFO, "nPos")
        If ($Pos <> $xPos) Then _GUIScrollBars_ScrollWindow($hWnd, $xChar * ($xPos - $Pos), 0)
        Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_HSCROLL

Func WM_VSCROLL($hWnd, $Msg, $wParam, $lParam)
        #forceref $Msg, $wParam, $lParam
        Local $nScrollCode = BitAND($wParam, 0x0000FFFF)
        Local $index = -1, $yChar, $yPos
        Local $Min, $Max, $Page, $Pos, $TrackPos

        For $x = 0 To UBound($aSB_WindowInfo) - 1
                If $aSB_WindowInfo[$x][0] = $hWnd Then
                        $index = $x
                        $yChar = $aSB_WindowInfo[$index][3]
                        ExitLoop
                EndIf
        Next
        If $index = -1 Then Return 0


        ; Get all the vertial scroll bar information
        Local $tSCROLLINFO = _GUIScrollBars_GetScrollInfoEx($hWnd, $SB_VERT)
        $Min = DllStructGetData($tSCROLLINFO, "nMin")
        $Max = DllStructGetData($tSCROLLINFO, "nMax")
        $Page = DllStructGetData($tSCROLLINFO, "nPage")
        ; Save the position for comparison later on
        $yPos = DllStructGetData($tSCROLLINFO, "nPos")
        $Pos = $yPos
        $TrackPos = DllStructGetData($tSCROLLINFO, "nTrackPos")

        Switch $nScrollCode
                Case $SB_TOP ; user clicked the HOME keyboard key
                        DllStructSetData($tSCROLLINFO, "nPos", $Min)

                Case $SB_BOTTOM ; user clicked the END keyboard key
                        DllStructSetData($tSCROLLINFO, "nPos", $Max)

                Case $SB_LINEUP ; user clicked the top arrow
                        DllStructSetData($tSCROLLINFO, "nPos", $Pos - 1)

                Case $SB_LINEDOWN ; user clicked the bottom arrow
                        DllStructSetData($tSCROLLINFO, "nPos", $Pos + 1)

                Case $SB_PAGEUP ; user clicked the scroll bar shaft above the scroll box
                        DllStructSetData($tSCROLLINFO, "nPos", $Pos - $Page)

                Case $SB_PAGEDOWN ; user clicked the scroll bar shaft below the scroll box
                        DllStructSetData($tSCROLLINFO, "nPos", $Pos + $Page)

                Case $SB_THUMBTRACK ; user dragged the scroll box
                        DllStructSetData($tSCROLLINFO, "nPos", $TrackPos)
        EndSwitch
        
;~    // Set the position and then retrieve it.  Due to adjustments
;~    //   by Windows it may not be the same as the value set.

        DllStructSetData($tSCROLLINFO, "fMask", $SIF_POS)
        _GUIScrollBars_SetScrollInfo($hWnd, $SB_VERT, $tSCROLLINFO)
        _GUIScrollBars_GetScrollInfo($hWnd, $SB_VERT, $tSCROLLINFO)
        ;// If the position has changed, scroll the window and update it
        $Pos = DllStructGetData($tSCROLLINFO, "nPos")

        If ($Pos <> $yPos) Then
                _GUIScrollBars_ScrollWindow($hWnd, 0, $yChar * ($yPos - $Pos))
                $yPos = $Pos
        EndIf

        Return $GUI_RUNDEFMSG

EndFunc   ;==>WM_VSCROLL