void drag_source_set( GdkModifierType start_button_mask , array targets , GdkDragAction actions );

Sets the calling widgets as a drag-and-drop source, so that data can be dragged from the widget to a drop target.

Example 58. Using drag_source_set()

$targets = array( array( 'text/uri-list', 0, 0));
$list->drag_source_set(GDK_BUTTON1_MASK|GDK_BUTTON3_MASK, $targets, GDK_ACTION_COPY);

The first parameter, start_button_mask, is a bitmask with all mouse buttons allowed to start the drag.

The targets is an array of data types provided as drag/drop data. See drag_dest_set() for a detailed explanation of this topic.

actions determine which actions will take place if the drop event occurs; a copy/move/delete. See GdkDragAction for all possible options.

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