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WklImage

WklImage class

Signature

Dim myWklImage As WklImage
Set myWklImage = Me!ControlName.Object

Summary

A picture from a file, a shared image of the database, SVG text or a data URI: SVG drawn with Direct2D, sharp at every size and in print; PNG, JPEG, BMP, GIF and ICO as well as EMF and WMF drawn with GDI+.

Parameters

None

Remarks

The source is read in this order: a text that starts with < is SVG; a text that starts with data: is a data URI (data:image/png;base64,… or URL-encoded SVG); a text with a path separator, a drive or a file extension is a file - a relative path is relative to the folder of the database (CurrentProject.Path); any other text is the name of a shared image of the database (Access's image gallery). Addresses on the network (http:, https:) are refused: the control does not load from the internet.

Bound - Control Source of the Access control set to a field - Access writes the field into Value on every record change: text is read as a source as above, bytes (a Long Binary field filled by code, for example from an ADODB.Stream) as a picture. A value other than Null takes the place of Source; Null shows Source again. A bound image never writes back.

The picture is loaded when it is first drawn after a change, not when the source is set. A source that cannot be shown - a missing file, a damaged picture, an SVG that is not XML - is no error for the form: the control shows the reason instead and ErrorText returns it.

SVG: currentColor takes the color SvgColor, so single-color icon sets follow the form's design. Direct2D draws the common SVG of icons and drawings (paths, basic shapes, gradients, transforms); text and filter effects of SVG are not drawn. Direct2D's SVG needs Windows 10 version 1703 or later.

The designer (row Custom [...] of the property sheet in design view, Opening the designer) sets the source - with a file dialog and a preview - the size mode and the colors.

An ActiveX control: inserted into a form in design view (Form Design › Controls › ActiveX Controls); reports are not supported. VBA reaches it through the Object property of the control, where ControlName is the name of the control on the form.

MemberKindSummary
`Value`PropertyGets or sets the bound value: a source text or the bytes of a picture.
`Source`PropertyGets or sets where the picture comes from.
`SizeMode`PropertyGets or sets how the picture fills the control.
`SvgColor`PropertyGets or sets the color that replaces currentColor in an SVG picture.
`BackColor`PropertyGets or sets the background color, visible where the picture is transparent or does not reach.
`ErrorText`PropertyGets why the picture cannot be shown.
`PictureWidth`PropertyGets the natural width of the picture.
`PictureHeight`PropertyGets the natural height of the picture.
`Reload`MethodReads the file or the shared image again, for example after the file was replaced.
EventSummary
`Click`Occurs when the user clicks the picture in form view.

Code example

' A single-color SVG symbol in the color of the form's title.
Private Sub Form_Load()
    With Me!imgSymbol.Object
        .Source = "symbole\lager.svg"     ' relative to the folder of the database
        .SizeMode = wimZoom
        .SvgColor = Me!lblTitel.ForeColor
        If Len(.ErrorText) > 0 Then Debug.Print .ErrorText
    End With
End Sub

Inheritance

None

Value property

Signature

Property Get Value() As Variant
Property Let Value(RHS As Variant)

Summary

Gets or sets the bound value: a source text or the bytes of a picture.

Parameters

None

Property value: Variant – A text read like Source, a byte array with a picture, or Null (default) to show Source.

Remarks

Access writes the value of the Control Source into it on every record change; code may set it too. The value is not stored with the form, and the control never reports it back to Access.

Read/write.

Code example

None

Inheritance

Declared by WklImage.

Source property

Signature

Property Get Source() As String
Property Let Source(RHS As String)

Summary

Gets or sets where the picture comes from.

Parameters

None

Property value: String – A file (absolute, or relative to the folder of the database), the name of a shared image of the database, SVG text starting with <, or a data URI; empty (default) for no picture.

Remarks

A URL raises wkeInvalidValue at the assignment. Outside Access (UserForms) a relative path is relative to the current folder of the process, and shared images are not available. The source is stored with the form; for a large picture prefer a file or a shared image to SVG text.

Read/write.

Code example

None

Inheritance

Declared by WklImage.

SizeMode property

Signature

Property Get SizeMode() As WklImageSizeMode
Property Let SizeMode(RHS As WklImageSizeMode)

Summary

Gets or sets how the picture fills the control.

Parameters

None

Property value: `WklImageSizeMode` – wimClip, wimStretch or wimZoom (default).

Remarks

Values outside the enumeration raise wkeInvalidValue.

Read/write.

Code example

None

Inheritance

Declared by WklImage.

SvgColor property

Signature

Property Get SvgColor() As OLE_COLOR
Property Let SvgColor(RHS As OLE_COLOR)

Summary

Gets or sets the color that replaces currentColor in an SVG picture.

Parameters

None

Property value: OLE_COLOR – An OLE color, system colors included; default the window text color of Windows.

Remarks

Has no effect on bitmaps and on SVG pictures without currentColor.

Read/write.

Code example

None

Inheritance

Declared by WklImage.

BackColor property

Signature

Property Get BackColor() As OLE_COLOR
Property Let BackColor(RHS As OLE_COLOR)

Summary

Gets or sets the background color, visible where the picture is transparent or does not reach.

Parameters

None

Property value: OLE_COLOR – An OLE color; default the window color of Windows.

Remarks

Read/write.

Code example

None

Inheritance

Declared by WklImage.

ErrorText property

Signature

Property Get ErrorText() As String

Summary

Gets why the picture cannot be shown.

Parameters

None

Property value: String – The reason, for example the path of a file that cannot be read; empty when the picture is shown or there is no source.

Remarks

Read-only.

Code example

None

Inheritance

Declared by WklImage.

PictureWidth property

Signature

Property Get PictureWidth() As Long

Summary

Gets the natural width of the picture.

Parameters

None

Property value: Long – Pixels (for SVG at 96 dpi, from width or the viewBox; 300 when the file gives neither); 0 without a picture.

Remarks

Read-only.

Code example

None

Inheritance

Declared by WklImage.

PictureHeight property

Signature

Property Get PictureHeight() As Long

Summary

Gets the natural height of the picture.

Parameters

None

Property value: Long – Pixels (for SVG at 96 dpi, from height or the viewBox; 150 when the file gives neither); 0 without a picture.

Remarks

Read-only.

Code example

None

Inheritance

Declared by WklImage.

Reload method

Signature

Sub Reload()

Summary

Reads the file or the shared image again, for example after the file was replaced.

Parameters

None

Remarks

None

Code example

None

Inheritance

Declared by WklImage.

Click event

Signature

Event Click()

Summary

Occurs when the user clicks the picture in form view.

Parameters

None

Remarks

In a form module: Private Sub <ControlName>_Click(...). Parameters passed by reference can be changed by the procedure.

Code example

None

Inheritance

Declared by WklImage.

en/wiki/msaccess/comctl/api-reference/wklimage.txt · Last modified: by Wolfgang van der Stille