caption: tm-edit-bitmap-operation
created: 20160424204236050
modified: 20160424215219517
tags: Messages
title: WidgetMessage: tm-edit-bitmap-operation
type: text/vnd.tiddlywiki

\define resizeDescription()
<div>

Resizes the image to the specified width and height. Parameters include:

|!Name |!Description |
|width |Specifies the width the image is resized to |
|height |Specifies the height the image is resized to |

</div>
\end

\define clearDescription()
<div>

Clears the contents of the image and fills it with a solid colour. Parameters include:

|!Name |!Description |
|colour |Colour the image should be filled with, defaults to <<.value "White">> |

<<.tip "The colour field can take any normal CSS colour value, including the hexadecimal representation or the RGB format.">>
</div>
\end



A `tm-edit-bitmap-operation` invokes one of the available operations on a __surrounding__ bitmap editor. Therefore the message has to be dispatched within the editor in order for it to catch it. The following properties on the `event` object are required:

|!Name |!Description |
|param |Name of the operation to be executed, see ''below'' for a list of possible operations |
|paramObject| Hashmap of additional parameters required by the operation top be executed |

The `tm-edit-bitmap-operation` message is usually generated by a ButtonWidget or an ActionWidget and is handled by the surrounding bitmap editor.

! Bitmap Operations

At this point the following bitmap operations have been implemented:

|!Name |!Description |
|<<.def "resize">>|<<resizeDescription>> |
|<<.def "clear">>|<<clearDescription>> |


!Example

An example can be seen in [[$:/core/ui/EditorToolbar/size-dropdown]]:

```
<$button>
<$action-sendmessage
	$message="tm-edit-bitmap-operation"
	$param="resize"
	width={{$config-title$/new-width}}
	height={{$config-title$/new-height}}
/>
...
Resize
</$button>
```