TransparencyMode (Property)

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Background image of a Chart control
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TransparencyMode (Property)

In french: ModeTransparence

The TransparencyMode property is used to get and change 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" control
IMG_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 The image transparency is kept.
trsMagenta The magenta color found in the image will be transparent during the display.

<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 image will be transparent.
trsImage The image transparency is kept.
trsMagenta The magenta color found in the image will be transparent during the display.

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.

Limits

The TransparencyMode property applies only to the following controls:

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