TransparencyMode (Property)

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Background image of a Chart control
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TransparencyMode (Property)

In french: ModeTransparence

The TransparencyMode property gets and sets the transparency mode of an image.

Remark: The transparency mode is defined in the editor via the "Transparency" option found in the description window of controls.

Example

// Modify the transparency mode of the image found in the "IMG_CarImage" controlIMG_CarImage.TransparencyMode = trsImage

Syntax

Finding out the current transparency mode Hide the details

<Current transparency> = <Control used>.TransparencyMode

<Current transparency>: Integer constant

Current transparency mode of the image:
trsTopLeftCorner The points with the same color as the one of the top left point of the image will be transparent.
trsImage Image transparency is preserved.
trsMagenta Magenta in the image will be transparent when displayed.

<Control used>: Control name

Name of the control to be used:
Image control.
Image column.
Background of a Chart control.
Thumbnail control.
Clickable Image control.

Modifying the transparency mode Hide the details

<Control used>.TransparencyMode = <New mode>

<Control used>: Control name

Name of the control to be used:
Image control.
Image column.
Background of a Chart control.
Thumbnail control.
Clickable Image control.

<New mode>: Integer constant

New transparency mode of the image:
trsTopLeftCorner The points with the same color as the one of the top left point of the image will be transparent.
trsImage Image transparency is preserved.
trsMagenta Magenta in the image will be transparent when displayed.

Remarks

Background image of a Chart control

When modifying the transparency mode of background image found in a Chart control, the chart display must be refreshed (by grDraw for example) in order for the change of transparency mode to appear.

Limitations

The TransparencyMode property can only be used in the following controls:

Image control.
Image column.
Background of a Chart control.
Thumbnail control.
Clickable Image control.