以picture作为容器加入若干个控件,如何把这些控件转化成图形保存输出

wdthkyou 2009-06-11 02:46:13
如题。网上搜了一下,没有发现有用的,望高手指点,谢谢先。
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wdthkyou 2009-06-13
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都是高手呀,学习了,谢谢!
结贴了。
vansoft 2009-06-12
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Option Explicit
Option Base 0

Public Type PALETTEENTRY
peRed As Byte
peGreen As Byte
peBlue As Byte
peFlags As Byte
End Type

Public Type LOGPALETTE
palVersion As Integer
palNumEntries As Integer
palPalEntry(255) As PALETTEENTRY
End Type

Public Type GUID
Data1 As Long
Data2 As Integer
Data3 As Integer
Data4(7) As Byte
End Type

Public Const RASTERCAPS As Long = 38
Public Const RC_PALETTE As Long = &H100
Public Const SIZEPALETTE As Long = 104

Public Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type

Public Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Public Declare Function GetDeviceCaps Lib "GDI32" (ByVal hDC As Long, ByVal iCapabilitiy As Long) As Long
Public Declare Function GetSystemPaletteEntries Lib "GDI32" (ByVal hDC As Long, ByVal wStartIndex As Long, ByVal wNumEntries As Long, lpPaletteEntries As PALETTEENTRY) As Long
Public Declare Function CreatePalette Lib "GDI32" (lpLogPalette As LOGPALETTE) As Long
Public Declare Function SelectObject Lib "GDI32" (ByVal hDC As Long, ByVal hObject As Long) As Long
Public Declare Function BitBlt Lib "GDI32" (ByVal hDCDest As Long, ByVal XDest As Long, ByVal YDest As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hDCSrc As Long, ByVal XSrc As Long, ByVal YSrc As Long, ByVal dwRop As Long) As Long
Public Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetForegroundWindow Lib "USER32" () As Long
Public Declare Function SelectPalette Lib "GDI32" (ByVal hDC As Long, ByVal hPalette As Long, ByVal bForceBackground As Long) As Long
Public Declare Function RealizePalette Lib "GDI32" (ByVal hDC As Long) As Long
Public Declare Function GetWindowDC Lib "USER32" (ByVal hWnd As Long) As Long
Public Declare Function GetDC Lib "USER32" (ByVal hWnd As Long) As Long
Public Declare Function GetWindowRect Lib "USER32" (ByVal hWnd As Long, lpRect As RECT) As Long
Public Declare Function ReleaseDC Lib "USER32" (ByVal hWnd As Long, ByVal hDC As Long) As Long
Public Declare Function GetDesktopWindow Lib "USER32" () As Long

Public Type PicBmp
Size As Long
Type As Long
hBmp As Long
hPal As Long
Reserved As Long
End Type

Public Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As PicBmp, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long

Public Function CapturePictureBox(PicBox As PictureBox) As Picture
Set CapturePictureBox = CaptureWindow(PicBox.hWnd, False, 0, 0, PicBox.ScaleX(PicBox.Width, vbTwips, vbPixels), PicBox.ScaleY(PicBox.Height, vbTwips, vbPixels))
End Function

Public Function CaptureWindow(ByVal hWndSrc As Long, ByVal Client As Boolean, ByVal LeftSrc As Long, ByVal TopSrc As Long, ByVal WidthSrc As Long, ByVal HeightSrc As Long) As Picture

Dim hDCMemory As Long
Dim hBmp As Long
Dim hBmpPrev As Long
Dim r As Long
Dim hDCSrc As Long
Dim hPal As Long
Dim hPalPrev As Long
Dim RasterCapsScrn As Long
Dim HasPaletteScrn As Long
Dim PaletteSizeScrn As Long
Dim LogPal As LOGPALETTE

If Client Then
hDCSrc = GetDC(hWndSrc)
Else
hDCSrc = GetWindowDC(hWndSrc)
End If

hDCMemory = CreateCompatibleDC(hDCSrc)
hBmp = CreateCompatibleBitmap(hDCSrc, WidthSrc, HeightSrc)
hBmpPrev = SelectObject(hDCMemory, hBmp)

RasterCapsScrn = GetDeviceCaps(hDCSrc, RASTERCAPS)
HasPaletteScrn = RasterCapsScrn And RC_PALETTE
PaletteSizeScrn = GetDeviceCaps(hDCSrc, SIZEPALETTE)

If HasPaletteScrn And (PaletteSizeScrn = 256) Then
LogPal.palVersion = &H300
LogPal.palNumEntries = 256
r = GetSystemPaletteEntries(hDCSrc, 0, 256, LogPal.palPalEntry(0))
hPal = CreatePalette(LogPal)
hPalPrev = SelectPalette(hDCMemory, hPal, 0)
r = RealizePalette(hDCMemory)
End If

r = BitBlt(hDCMemory, 0, 0, WidthSrc, HeightSrc, hDCSrc, LeftSrc, TopSrc, vbSrcCopy)

hBmp = SelectObject(hDCMemory, hBmpPrev)

If HasPaletteScrn And (PaletteSizeScrn = 256) Then
hPal = SelectPalette(hDCMemory, hPalPrev, 0)
End If

r = DeleteDC(hDCMemory)
r = ReleaseDC(hWndSrc, hDCSrc)

Set CaptureWindow = CreateBitmapPicture(hBmp, hPal)
End Function

Public Function CreateBitmapPicture(ByVal hBmp As Long, ByVal hPal As Long) As Picture
Dim r As Long

Dim Pic As PicBmp
Dim IPic As IPicture
Dim IID_IDispatch As GUID

With IID_IDispatch
.Data1 = &H20400
.Data4(0) = &HC0
.Data4(7) = &H46
End With

With Pic
.Size = Len(Pic)
.Type = vbPicTypeBitmap
.hBmp = hBmp
.hPal = hPal
End With

r = OleCreatePictureIndirect(Pic, IID_IDispatch, 1, IPic)

Set CreateBitmapPicture = IPic
End Function


以上为模块,调用方法:

On Error GoTo SaveErr
Set Picture2.Picture = CapturePictureBox(Picture1)
CommonDialog1.ShowSave
SavePicture Picture2.Picture, CommonDialog1.FileName
SaveErr:
clear_zero 2009-06-11
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实际上,可以将作为容器的 Picture 控件中的内容,作为图形全部映射到另一个 Picture 控件(可以隐藏在前者后面)中,然后从后者打印或保存。

通用段中声明常数和 API 函数:
Private Const twipFactor = 1440
Private Const WM_PAINT = &HF
Private Const WM_PRINT = &H317
Private Const PRF_CLIENT = &H4& ' Draw the window's client area.
Private Const PRF_CHILDREN = &H10& ' Draw all visible child windows.
Private Const PRF_OWNED = &H20& ' Draw all owned windows.

Private Declare Function SendMessage Lib "user32" Alias _
"SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, _
ByVal wParam As Long, ByVal lParam As Long) As Long

下面代码放入打印过程:

Dim rv As Long

Picture1.SetFocus
Picture2.AutoRedraw = True
rv = SendMessage(Picture1.hwnd, WM_PAINT, Picture2.hDC, 0)
rv = SendMessage(Picture1.hwnd, WM_PRINT, Picture2.hDC, PRF_CHILDREN + PRF_CLIENT + PRF_OWNED)
Picture2.Picture = Picture2.Image
Picture2.AutoRedraw = False

' Printer.Print ""
' Printer.PaintPicture Picture2.Picture, 0, 0
' Printer.EndDoc

SavePicture Picture2.Picture, App.Path & "\backup.bmp"

这样,Picture1 可以作为容器,反复进行其内部控件的编辑,例如填表,并打印输出。
贝隆 2009-06-11
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高手啊!
lyserver 2009-06-11
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如果控件被遮掩,可以考虑使用DrawFrameControl绘制。
of123 2009-06-11
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实际上,可以将作为容器的 Picture 控件中的内容,作为图形全部映射到另一个 Picture 控件(可以隐藏在前者后面)中,然后从后者打印或保存。

通用段中声明常数和 API 函数:
Private Const twipFactor = 1440
Private Const WM_PAINT = &HF
Private Const WM_PRINT = &H317
Private Const PRF_CLIENT = &H4& ' Draw the window's client area.
Private Const PRF_CHILDREN = &H10& ' Draw all visible child windows.
Private Const PRF_OWNED = &H20& ' Draw all owned windows.

Private Declare Function SendMessage Lib "user32" Alias _
"SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, _
ByVal wParam As Long, ByVal lParam As Long) As Long

下面代码放入打印过程:

Dim rv As Long

Picture1.SetFocus
Picture2.AutoRedraw = True
rv = SendMessage(Picture1.hwnd, WM_PAINT, Picture2.hDC, 0)
rv = SendMessage(Picture1.hwnd, WM_PRINT, Picture2.hDC, PRF_CHILDREN + PRF_CLIENT + PRF_OWNED)
Picture2.Picture = Picture2.Image
Picture2.AutoRedraw = False

' Printer.Print ""
' Printer.PaintPicture Picture2.Picture, 0, 0
' Printer.EndDoc

SavePicture Picture2.Picture, App.Path & "\backup.bmp"

这样,Picture1 可以作为容器,反复进行其内部控件的编辑,例如填表,并打印输出。
东方之珠 2009-06-11
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参考下面的:
http://topic.csdn.net/u/20090419/19/e20a8208-c9e7-4c29-a5ea-927e54aeba9d.html?2098442212
http://topic.csdn.net/u/20080331/19/6c605dcc-2f22-4de7-a7f2-c6c122a615f7.html?1759399285
yanlongwuhui 2009-06-11
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解决问题的速度还蛮快,建议楼主看下“提问的智慧”
wdthkyou 2009-06-11
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搞定,方法如下:
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long

Private Sub Command1_Click()
Picture1.AutoRedraw = True
Picture1.Width = Me.Width
Picture1.Height = Me.Height
BitBlt Picture1.hDC, 0, 0, Picture1.Width, Picture1.Height, Me.hDC, 0, 0, vbSrcCopy
SavePicture Picture1.Image, App.Path & "\acd.bmp" '保存
End Sub

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