picture box with scrollbar

hi all,

1. how can i check the picture control is empty

2. Is it possible to insert scroll bar(horizonatl and veritcal) with picture control so that i can scroll i see the complete image inserted


thanks in advance

saj

1. To check if there is a picture in the Picturebox you can use..

VB Code:

If Picture1.Picture = 0 Then
        MsgBox "No picture loaded"
    Else
        MsgBox "there is a picture loaded"
    End If

The image in the picturebox is different, it's always there but it's not possible to know if there is something drawn (image is not the same than picture here), the image contains what you draw or paint manually inside the picturebox canvas. The answer to your question (2) here uses the image, not the picture, but you can easily copy the image to picture:

VB Code:

Set Picture1.Picture = Picture1.Image

2. Add a VScroll1 and a HScroll to your Form
In this example i loaded the picture by code but it can be changed to work with a picture loaded in design mode.

VB Code:

Private mPic        As Picture
Private mWidth      As Long
Private mHeight     As Long
 
Private Sub Form_Load()
    With Picture1
        .ScaleMode = vbPixels
        .AutoRedraw = True
        
        Set mPic = LoadPicture("D:\chory.jpg")  '(Load your picture in this line)
        
        mWidth = ScaleX(mPic.Width, vbHimetric, vbPixels)
        mHeight = ScaleX(mPic.Height, vbHimetric, vbPixels)
        .PaintPicture mPic, 0, 0
    End With
            
    If mHeight > Picture1.ScaleHeight Then
        With VScroll1
            .Min = 0
            .Max = mHeight - Picture1.ScaleHeight
            .SmallChange = ((mHeight - Picture1.ScaleHeight) / 100) + 1
            .LargeChange = ((mHeight - Picture1.ScaleHeight) / 10) + 1
        End With
    Else
        VScroll1.Enabled = False
    End If
    
    If mWidth > Picture1.ScaleWidth Then
        With HScroll1
            .Min = 0
            .Max = mWidth - Picture1.ScaleWidth
            .SmallChange = ((mWidth - Picture1.ScaleWidth) / 100) + 1
            .LargeChange = ((mWidth - Picture1.ScaleWidth) / 10) + 1
        End With
    Else
        HScroll1.Enabled = False
    End If
End Sub
 
Private Sub HScroll1_Change()
    RedrawPic
End Sub
 
Private Sub VScroll1_Change()
    RedrawPic
End Sub
 
Private Sub RedrawPic()
    With Picture1
        .Cls
        .PaintPicture mPic, -HScroll1.Value, -VScroll1.Value
    End With
End Sub

Quote:

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Originally Posted by sajankk

1. how can i check the picture control is empty

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If Picture1.Picture.Width = 0 Then 'Empty