1.19.2 Send methods

button ->compute:

Computes the graphical<-width and graphical<-height using the graphical<-name and button<-font. If the required size turns out to be smaller than button.size this size is used instead.

button ->default_button: [bool]

Inherits description from: button-default_button, button<-default_button

button ->event: event

First calls dialog_item->event. If this fails it passes the event to @_button_gesture (a click_gesture object).

button ->execute:

If dialog_item<-message is not @nil, button->execute acts as a wrapper around button->forward, dealing with the visual feedback. The visual feedback consist of switching button->status to execute and setting the busy-cursor (using display->busy_cursor).

button ->forward:

Perform associated action. The action depends in dialog_item<-message:

• @nil No action is performed
• @default graphical<-name is sent to graphical<-device
• a code object The code object is executed, while @receiver is bound to the button object.

button ->initialise: name=name, message=[code]*, label=[name]

Create a button with the specified graphical<-name. The displayed dialog_item<-label is computed from this name using char_array<-label_name from the graphical<-name.

When the button is depressed (using the left-button) it will button->execute itself, activating the given code object.

button ->key: key=name

Normally invoked from window->typed. Key is the symbolic name of the key(-sequence) typed. If this key is equal to dialog_item<-accelerator, button->execute the button.

button ->popup: popup*

Assign button<-popup and update (add/remove) the indication on the button for the existence of a popup menu.

button ->selection: char_array|image*

Inherits description from: button<-selection

button ->status: {inactive,active,preview,execute}

Assign dialog_item<-status and redraw:

active and inactive	Normal appearance
preview	Inverted inside
execute	Grey inside background