函数参考

_GUICtrlRichEdit_EmptyUndoBuffer

重置控件撤消标志

#Include <GuiRichEdit.au3>
_GUICtrlRichEdit_EmptyUndoBuffer($hWnd)

参数

返回值

注意/说明

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示例/演示

#include <GuiRichEdit.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GuiMenu.au3>

Global $hRichEdit, $mnu, $mnuUndo, $mnuRedo, $mnuEmpty

Main()

Func Main()
    Local $hGui
    $hGui = GUICreate("Example (" & StringTrimRight(@ScriptName, 4) & ")", 320, 350, -1, -1)
    $hRichEdit = _GUICtrlRichEdit_Create($hGui, "This is a test.", 10, 10, 300, 220, _
            BitOR($ES_MULTILINE, $WS_VSCROLL, $ES_AUTOVSCROLL))
    GUISetState(@SW_SHOW)

    GUIRegisterMsg($WM_NOTIFY, "WM_NOTIFY")

    $mnu = GUICtrlCreateContextMenu(GUICtrlCreateDummy())
    $mnuUndo = GUICtrlCreateMenuItem("Undo", $mnu)
    $mnuRedo = GUICtrlCreateMenuItem("Redo", $mnu)
    GUICtrlCreateMenuItem("", $mnu)
    $mnuEmpty = GUICtrlCreateMenuItem("Empty Undo buffer", $mnu)

    _GUICtrlRichEdit_SetEventMask($hRichEdit, $ENM_MOUSEEVENTS)

    While True
        Switch GUIGetMsg()
            Case $GUI_EVENT_CLOSE
                _GUICtrlRichEdit_Destroy($hRichEdit) ; 除非脚本崩溃才需要
;~              GUIDelete()     ; 同样行
                Exit
            Case $mnuUndo
                _GUICtrlRichEdit_Undo($hRichEdit)
            Case $mnuRedo
                _GUICtrlRichEdit_Redo($hRichEdit)
            Case $mnuEmpty
                _GUICtrlRichEdit_EmptyUndoBuffer($hRichEdit)
        EndSwitch
    WEnd
EndFunc   ;==>Main

Func WM_NOTIFY($hWnd, $iMsg, $iWparam, $iLparam)
    #forceref $iMsg, $iWparam
    Local $hWndFrom, $iCode, $tNMHDR, $tMsgFilter, $hMenu
    $tNMHDR = DllStructCreate($tagNMHDR, $iLparam)
    $hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
    $iCode = DllStructGetData($tNMHDR, "Code")
    Switch $hWndFrom
        Case $hRichEdit
            Select
                Case $iCode = $EN_MSGFILTER
                    $tMsgFilter = DllStructCreate($tagMSGFILTER, $iLparam)
                    If DllStructGetData($tMsgFilter, "msg") = $WM_RBUTTONUP Then
                        $hMenu = GUICtrlGetHandle($mnu)
                        SetMenuTexts($hWndFrom, $hMenu)
                        _GUICtrlMenu_TrackPopupMenu($hMenu, $hWnd)
                    EndIf
            EndSelect
    EndSwitch
    Return $GUI_RUNDEFMSG
EndFunc   ;==>WM_NOTIFY

Func SetMenuTexts($hWnd, $hMenu)
    If _GUICtrlRichEdit_CanUndo($hWnd) Then
        _GUICtrlMenu_SetItemEnabled($hMenu, $mnuUndo, True, False)
        _GUICtrlMenu_SetItemText($hMenu, $mnuUndo, "Undo: " & _GUICtrlRichEdit_GetNextUndo($hWnd), False)
        _GUICtrlMenu_SetItemEnabled($hMenu, $mnuEmpty, True, False)
    Else
        _GUICtrlMenu_SetItemText($hMenu, $mnuUndo, "Undo", False)
        _GUICtrlMenu_SetItemEnabled($hMenu, $mnuUndo, False, False)
        _GUICtrlMenu_SetItemEnabled($hMenu, $mnuEmpty, False, False)
    EndIf
    If _GUICtrlRichEdit_CanRedo($hWnd) Then
        _GUICtrlMenu_SetItemEnabled($hMenu, $mnuRedo, True, False)
        _GUICtrlMenu_SetItemText($hMenu, $mnuRedo, "Redo: " & _GUICtrlRichEdit_GetNextRedo($hWnd), False)
    Else
        _GUICtrlMenu_SetItemText($hMenu, $mnuRedo, "Redo", False)
        _GUICtrlMenu_SetItemEnabled($hMenu, $mnuRedo, False, False)
    EndIf
EndFunc   ;==>SetMenuTexts