[sitemap] Buttongrid as container for new Button elements

[lolodomo]

Related to #4173

Signed-off-by: Laurent Garnier [email protected]

[lolodomo]

The proposed syntax for the Button is :

Button item=<item> [label=<label>] [icon=<icon>] row=<row> column=<column> [stateless] click=<cmd> [release=<cmd>] [labelcolor=[...]] [iconcolor=[...]] [visibility=[...]]
Button item=<item> [label=<label>] [staticIcon=<icon>] row=<row> column=<column> [stateless] click=<cmd> [release=<cmd>] [labelcolor=[...]] [iconcolor=[...]] [visibility=[...]]
Button item=<item> [label=<label>] [icon=[...]] row=<row> column=<column> [stateless] click=<cmd> [release=<cmd>] [labelcolor=[...]] [iconcolor=[...]] [visibility=[...]]

Explanations of the parameters:

• The position of the button in the grid is defined by the row and column parameters.
• The label parameter defines the text to display in the button. If not present, the value of the command (click parameter) is used as text.
• The icon parameter defines the icon to display in the button. If not present, the button will contain a text. The icon can be dynamic by defining rules in the icon parameter.
• By default, a button is stateful. It is stateless if stateless parameter is present.
• A button is a click button by default, the command to send to the item is defined by the click parameter. Press & release behaviour is possible by setting the click and release parameters.
• Label and icon color can be dynamic using the labelcolor and iconcolor parameters.
• Visibility of the button can be dynamic using the visibility parameter.

Such Button element is valid only inside a Buttongrid element.