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note description: "[ Drop down menu containing EV_MENU_ITEMs ]" legal: "See notice at end of class." status: "See notice at end of class." keywords: "menu, bar, drop down, popup" date: "$Date: 2009-06-03 17:11:49 -0700 (Wed, 03 Jun 2009) $" revision: "$Revision: 79073 $" class interface EV_MENU create default_create -- Standard creation procedure. -- (from EV_ANY) require -- from ANY True ensure then -- from EV_ANY is_coupled: implementation /= Void is_initialized: is_initialized default_create_called: default_create_called is_in_default_state: is_in_default_state make_with_text (a_text: READABLE_STRING_GENERAL) -- Create Current and assign a_text to text -- (from EV_TEXTABLE) require -- from EV_TEXTABLE a_text_not_void: a_text /= Void ensure -- from EV_TEXTABLE text_assigned: text.same_string_general (a_text) and text /= a_text make_with_text_and_action (a_text: READABLE_STRING_GENERAL; an_action: PROCEDURE) -- Create with 'a_text' and an_action in select_actions. -- (from EV_MENU_ITEM) require -- from EV_MENU_ITEM text_not_void: a_text /= Void an_action_not_void: an_action /= Void ensure -- from EV_MENU_ITEM text_assigned: text.same_string_general (a_text) select_actions_has_an_action: select_actions.has (an_action) feature -- Access accept_cursor: EV_POINTER_STYLE -- Result is cursor displayed when the screen pointer is over a -- target that accepts pebble during pick and drop. -- (from EV_PICK_AND_DROPABLE) require -- from EV_ABSTRACT_PICK_AND_DROPABLE True ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE result_not_void: Result /= Void ensure then -- from EV_PICK_AND_DROPABLE cursor_valid: (attached implementation.accept_cursor implies Result = implementation.accept_cursor) or else Result = Default_pixmaps.Standard_cursor at alias "@" (i: INTEGER_32): like item assign dl_put_i_th -- Item at i-th position -- Was declared in CHAIN as synonym of i_th. -- (from CHAIN) require -- from TABLE valid_key: valid_index (i) attached_parent: attached like parent -- Attached parent. -- (from EV_ITEM) require -- from EV_ITEM parent /= Void configurable_target_menu_handler: detachable PROCEDURE [EV_MENU, ARRAYED_LIST [EV_PND_TARGET_DATA], EV_PICK_AND_DROPABLE, detachable ANY] -- Agent used for customizing the Pick and Drop Target Menu of Current. -- (from EV_PICK_AND_DROPABLE) cursor: EV_DYNAMIC_LIST_CURSOR [EV_MENU_ITEM] -- Current cursor position. -- (from EV_DYNAMIC_LIST) require -- from CURSOR_STRUCTURE True ensure -- from CURSOR_STRUCTURE cursor_not_void: Result /= Void ensure then -- from EV_DYNAMIC_LIST bridge_ok: Result.is_equal (implementation.cursor) data: detachable ANY -- Arbitrary user data may be stored here. -- (from EV_ANY) default_identifier_name: STRING_32 -- Default name if no other name is set. -- (from EV_MENU_ITEM) require -- from EV_IDENTIFIABLE True ensure -- from EV_IDENTIFIABLE result_not_void: Result /= Void result_not_empty: not Result.is_empty no_period_in_result: not Result.has ('.'.to_character_32) deny_cursor: EV_POINTER_STYLE -- Result is cursor displayed when the screen pointer is over a -- target that does not accept pebble during pick and drop. -- (from EV_PICK_AND_DROPABLE) require -- from EV_ABSTRACT_PICK_AND_DROPABLE True ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE result_not_void: Result /= Void ensure then -- from EV_PICK_AND_DROPABLE cursor_valid: (attached implementation.deny_cursor implies Result = implementation.deny_cursor) or else Result = Default_pixmaps.No_cursor first: like item -- Item at first position -- (from CHAIN) require -- from CHAIN not_empty: not is_empty full_identifier_path: STRING_32 -- Full name of object by prepending path of parent -- Uses '.' as a separator. -- (from EV_IDENTIFIABLE) ensure -- from EV_IDENTIFIABLE result_not_void: Result /= Void result_correct: parent = Void implies Result.is_equal (identifier_name) result_correct: attached parent as l_parent implies Result.is_equal (l_parent.full_identifier_path + "." + identifier_name) generating_type: TYPE [detachable EV_MENU] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty has (v: like item): BOOLEAN -- Does chain include v? -- (Reference or object equality, -- based on object_comparison.) -- (from CHAIN) i_th alias "[]" (i: INTEGER_32): like item -- Item at i-th position. -- (from EV_DYNAMIC_LIST) require -- from TABLE valid_key: valid_index (i) require -- from READABLE_INDEXABLE valid_index: valid_index (i) ensure then -- from EV_DYNAMIC_LIST bridge_ok: Result.is_equal (implementation.i_th (i)) frozen id_object (an_id: INTEGER_32): detachable IDENTIFIED -- Object associated with an_id (void if no such object) -- (from IDENTIFIED) ensure -- from IDENTIFIED consistent: Result = Void or else Result.object_id = an_id identifier_name: STRING_32 -- Name of object -- If no specific name is set, default_identifier_name is used. -- (from EV_IDENTIFIABLE) ensure -- from EV_IDENTIFIABLE result_not_void: Result /= Void result_not_empty: not Result.is_empty no_period_in_result: not Result.has ('.'.to_character_32) default_name_available: not has_identifier_name_set implies Result.is_equal (default_identifier_name) index: INTEGER_32 -- Current position. -- (from EV_DYNAMIC_LIST) require -- from LINEAR True ensure then -- from EV_DYNAMIC_LIST bridge_ok: Result = implementation.index index_of (v: like item; i: INTEGER_32): INTEGER_32 -- Index of ith occurrence of v. -- (from EV_DYNAMIC_LIST) ensure then -- from EV_DYNAMIC_LIST bridge_ok: Result = implementation.index_of (v, i) item: EV_MENU_ITEM -- Item at current position. -- (from EV_DYNAMIC_LIST) require -- from TRAVERSABLE not_off: not off require -- from ACTIVE readable: readable ensure then -- from EV_DYNAMIC_LIST not_void: Result /= Void bridge_ok: Result.is_equal (implementation.item) item_for_iteration: EV_MENU_ITEM -- Item at current position -- (from LINEAR) require -- from LINEAR not_off: not off last: like item -- Item at last position -- (from CHAIN) require -- from CHAIN not_empty: not is_empty new_cursor: INDEXABLE_ITERATION_CURSOR [EV_MENU_ITEM] -- Fresh cursor associated with current structure -- (from READABLE_INDEXABLE) ensure -- from ITERABLE result_attached: Result /= Void frozen object_id: INTEGER_32 -- Unique for current object in any given session -- (from IDENTIFIED) ensure -- from IDENTIFIED valid_id: Result > 0 implies id_object (Result) = Current pebble: detachable ANY -- Data to be transported by pick and drop mechanism. -- (from EV_PICK_AND_DROPABLE) require -- from EV_ABSTRACT_PICK_AND_DROPABLE True ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.pebble pebble_function: detachable FUNCTION [detachable ANY] -- Returns data to be transported by pick and drop mechanism. -- (from EV_PICK_AND_DROPABLE) require -- from EV_ABSTRACT_PICK_AND_DROPABLE True ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.pebble_function pebble_positioning_enabled: BOOLEAN -- If True then pick and drop start coordinates are -- pebble_x_position, pebble_y_position. -- If False then pick and drop start coordinates are -- the pointer coordinates. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.pebble_positioning_enabled pebble_x_position: INTEGER_32 -- Initial x position for pick and drop relative to Current. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.pebble_x_position pebble_y_position: INTEGER_32 -- Initial y position for pick and drop relative to Current. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.pebble_y_position pixmap: detachable EV_PIXMAP -- Copy of image displayed on Current. -- Void if none. -- (from EV_PIXMAPABLE) require -- from EV_PIXMAPABLE not_destroyed: not is_destroyed ensure -- from EV_PIXMAPABLE bridge_ok: (Result = Void and implementation.pixmap = Void) or (attached Result and then attached implementation.pixmap as l_pixmap and then Result.is_equal (l_pixmap)) retrieve_item_by_data (some_data: ANY; should_compare_objects: BOOLEAN): detachable EV_MENU_ITEM -- Result is first item in Current with data -- matching some_data. Compare objects if -- should_compare_objects otherwise compare references. -- (from EV_DYNAMIC_LIST) ensure -- from EV_DYNAMIC_LIST not_found_in_empty: Result /= Void implies not is_empty index_not_changed: old index = index retrieve_items_by_data (some_data: ANY; should_compare_objects: BOOLEAN): ARRAYED_LIST [EV_MENU_ITEM] -- Result is all items in Current with data -- matching some_data. Compare objects if -- should_compare_objects otherwise compare references. -- (from EV_DYNAMIC_LIST) ensure -- from EV_DYNAMIC_LIST result_not_void: Result /= Void not_found_in_empty: not Result.is_empty implies not is_empty index_not_changed: old index = index target_data_function: detachable FUNCTION [like pebble, EV_PND_TARGET_DATA] -- Function for computing target meta data based on source pebble. -- Primarily used for Pick and Drop target menu. -- (from EV_ABSTRACT_PICK_AND_DROPABLE) note option: stable target_name: detachable READABLE_STRING_GENERAL -- Optional textual name describing Current pick and drop hole. -- (from EV_ABSTRACT_PICK_AND_DROPABLE) note option: stable text: STRING_32 -- Text displayed in textable. -- (from EV_TEXTABLE) require -- from EV_TEXTABLE not_destroyed: not is_destroyed ensure -- from EV_TEXTABLE bridge_ok: equal (Result, implementation.text) not_void: Result /= Void cloned: Result /= implementation.text no_carriage_returns: not Result.has ('%R'.to_character_32) feature -- Measurement count: INTEGER_32 -- Number of items. -- (from EV_DYNAMIC_LIST) require -- from FINITE True require -- from READABLE_INDEXABLE True ensure -- from FINITE count_non_negative: Result >= 0 ensure then -- from EV_DYNAMIC_LIST bridge_ok: Result = implementation.count height: INTEGER_32 -- Vertical size in pixels. -- Same as minimum_height when not displayed. -- (from EV_POSITIONED) require -- from EV_POSITIONED not_destroyed: not is_destroyed ensure -- from EV_POSITIONED bridge_ok: Result = implementation.height Lower: INTEGER_32 = 1 -- Minimum index. -- (from CHAIN) minimum_height: INTEGER_32 -- Lower bound on height in pixels. -- (from EV_POSITIONED) require -- from EV_POSITIONED not_destroyed: not is_destroyed ensure -- from EV_POSITIONED bridge_ok: Result = implementation.minimum_height positive_or_zero: Result >= 0 minimum_width: INTEGER_32 -- Lower bound on width in pixels. -- (from EV_POSITIONED) require -- from EV_POSITIONED not_destroyed: not is_destroyed ensure -- from EV_POSITIONED bridge_ok: Result = implementation.minimum_width positive_or_zero: Result >= 0 occurrences (v: like item): INTEGER_32 -- Number of times v appears. -- (Reference or object equality, -- based on object_comparison.) -- (from CHAIN) screen_x: INTEGER_32 -- Horizontal offset relative to screen. -- (from EV_POSITIONED) require -- from EV_POSITIONED not_destroyed: not is_destroyed ensure -- from EV_POSITIONED bridge_ok: Result = implementation.screen_x screen_y: INTEGER_32 -- Vertical offset relative to screen. -- (from EV_POSITIONED) require -- from EV_POSITIONED not_destroyed: not is_destroyed ensure -- from EV_POSITIONED bridge_ok: Result = implementation.screen_y width: INTEGER_32 -- Horizontal size in pixels. -- Same as minimum_width when not displayed. -- (from EV_POSITIONED) require -- from EV_POSITIONED not_destroyed: not is_destroyed ensure -- from EV_POSITIONED bridge_ok: Result = implementation.width x_position: INTEGER_32 -- Horizontal offset relative to parent x_position in pixels. -- (from EV_POSITIONED) require -- from EV_POSITIONED not_destroyed: not is_destroyed ensure -- from EV_POSITIONED bridge_ok: Result = implementation.x_position y_position: INTEGER_32 -- Vertical offset relative to parent y_position in pixels. -- (from EV_POSITIONED) require -- from EV_POSITIONED not_destroyed: not is_destroyed ensure -- from EV_POSITIONED bridge_ok: Result = implementation.y_position feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal (other: EV_MENU): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) is_equal (other: EV_MENU): BOOLEAN -- Does other contain the same elements? -- (from LIST) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result ensure then -- from LIST indices_unchanged: index = old index and other.index = old other.index true_implies_same_size: Result implies count = other.count frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal (other: EV_MENU): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report after: BOOLEAN -- Is there no valid cursor position to the right of cursor? -- (from LIST) require -- from LINEAR True before: BOOLEAN -- Is there no valid cursor position to the left of cursor? -- (from LIST) require -- from BILINEAR True conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void exhausted: BOOLEAN -- Has structure been completely explored? -- (from LINEAR) ensure -- from LINEAR exhausted_when_off: off implies Result extendible: BOOLEAN -- May new items be added? (Answer: yes.) -- (from DYNAMIC_CHAIN) require -- from COLLECTION True Full: BOOLEAN = False -- Is structured filled to capacity? (Answer: no.) -- (from EV_DYNAMIC_LIST) has_identifier_name_set: BOOLEAN -- Is a specific identifier name set? -- (from EV_IDENTIFIABLE) has_parent: BOOLEAN -- Does identifiable has a parent? -- (from EV_IDENTIFIABLE) is_empty: BOOLEAN -- Is structure empty? -- (from FINITE) require -- from CONTAINER True is_inserted (v: EV_MENU_ITEM): BOOLEAN -- Has v been inserted by the most recent insertion? -- (By default, the value returned is equivalent to calling -- has (v). However, descendants might be able to provide more -- efficient implementations.) -- (from COLLECTION) is_sensitive: BOOLEAN -- Is object sensitive to user input. -- (from EV_SENSITIVE) require -- from EV_SENSITIVE not_destroyed: not is_destroyed ensure -- from EV_SENSITIVE bridge_ok: Result = implementation.user_is_sensitive isfirst: BOOLEAN -- Is cursor at first position? -- (from CHAIN) ensure -- from CHAIN valid_position: Result implies not is_empty islast: BOOLEAN -- Is cursor at last position? -- (from CHAIN) ensure -- from CHAIN valid_position: Result implies not is_empty mode_is_configurable_target_menu: BOOLEAN -- Is the user interface mode a configurable pop-up menu of targets? -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.mode_is_configurable_target_menu mode_is_drag_and_drop: BOOLEAN -- Is the user interface mode drag and drop? -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.mode_is_drag_and_drop mode_is_pick_and_drop: BOOLEAN -- Is the user interface mode pick and drop? -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.mode_is_pick_and_drop mode_is_target_menu: BOOLEAN -- Is the user interface mode a pop-up menu of targets? -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure then -- from EV_PICK_AND_DROPABLE bridge_ok: Result = implementation.mode_is_target_menu object_comparison: BOOLEAN -- Must search operations use equal rather than = -- for comparing references? (Default: no, use =.) -- (from CONTAINER) off: BOOLEAN -- Is there no current item? -- (from CHAIN) require -- from TRAVERSABLE True parent: detachable EV_MENU_ITEM_LIST -- Menu item list containing Current. require -- from EV_IDENTIFIABLE not_destroyed: not is_destroyed ensure -- from EV_IDENTIFIABLE correct: has_parent implies Result /= Void correct: not has_parent implies Result = Void ensure then -- from EV_ITEM bridge_ok: Result = implementation.parent prunable: BOOLEAN -- May items be removed? (Answer: yes.) -- (from DYNAMIC_CHAIN) require -- from COLLECTION True readable: BOOLEAN -- Is there a current item that may be read? -- (from SEQUENCE) require -- from ACTIVE True replaceable: BOOLEAN -- Can current item be replaced? -- (from ACTIVE) same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) valid_cursor (p: CURSOR): BOOLEAN -- Can the cursor be moved to position p? -- This is True if p conforms to EV_DYNAMIC_LIST_CURSOR and -- if it points to an item, Current must have it. -- (from EV_DYNAMIC_LIST) require -- from CURSOR_STRUCTURE True ensure then -- from EV_DYNAMIC_LIST bridge_ok: Result = implementation.valid_cursor (p) valid_cursor_index (i: INTEGER_32): BOOLEAN -- Is i correctly bounded for cursor movement? -- (from CHAIN) ensure -- from CHAIN valid_cursor_index_definition: Result = ((i >= 0) and (i <= count + 1)) valid_index (i: INTEGER_32): BOOLEAN -- Is i within allowable bounds? -- (from CHAIN) require -- from READABLE_INDEXABLE True require -- from TABLE True ensure -- from READABLE_INDEXABLE only_if_in_index_set: Result implies (Lower <= i and i <= count) ensure then -- from CHAIN valid_index_definition: Result = ((i >= 1) and (i <= count)) writable: BOOLEAN -- Is there a current item that may be modified? -- (from SEQUENCE) require -- from ACTIVE True feature -- Status setting compare_objects -- Ensure that future search operations will use equal -- rather than = for comparing references. -- (from CONTAINER) require -- from CONTAINER changeable_comparison_criterion: Changeable_comparison_criterion ensure -- from CONTAINER object_comparison compare_references -- Ensure that future search operations will use = -- rather than equal for comparing references. -- (from CONTAINER) require -- from CONTAINER changeable_comparison_criterion: Changeable_comparison_criterion ensure -- from CONTAINER reference_comparison: not object_comparison disable_pebble_positioning -- Assign False to pebble_positioning_enabled. -- The pick and drop will start at the pointer position. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure -- from EV_PICK_AND_DROPABLE pebble_positioning_updated: not pebble_positioning_enabled disable_sensitive -- Make object non-sensitive to user input. -- (from EV_SENSITIVE) require -- from EV_SENSITIVE not_destroyed: not is_destroyed ensure -- from EV_SENSITIVE is_unsensitive: not is_sensitive enable_pebble_positioning -- Assign True to pebble_positioning_enabled. -- Use pebble_x_position and pebble_y_position as the initial coordinates -- for the pick and drop in pixels relative to Current. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure -- from EV_PICK_AND_DROPABLE pebble_positioning_updated: pebble_positioning_enabled enable_sensitive -- Make object sensitive to user input. -- (from EV_SENSITIVE) require -- from EV_SENSITIVE not_destroyed: not is_destroyed ensure -- from EV_SENSITIVE is_sensitive: (parent = Void or parent_is_sensitive) implies is_sensitive remove_pebble -- Make pebble Void and pebble_function `Void, -- Removing transport. -- (from EV_PICK_AND_DROPABLE) ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE pebble_removed: pebble = Void and pebble_function = Void set_accept_cursor (a_cursor: detachable like accept_cursor) -- Set a_cursor to be displayed when the screen pointer is over a -- target that accepts pebble during pick and drop. -- (from EV_PICK_AND_DROPABLE) ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE accept_cursor_assigned: attached a_cursor as l_accept_cursor implies l_accept_cursor ~ accept_cursor set_configurable_target_menu_handler (a_handler: detachable PROCEDURE [EV_MENU, ARRAYED_LIST [EV_PND_TARGET_DATA], EV_PICK_AND_DROPABLE, detachable ANY]) -- Set Configurable Target Menu Handler to a_handler. -- (from EV_PICK_AND_DROPABLE) ensure -- from EV_PICK_AND_DROPABLE configurable_target_menu_hander_assigned: configurable_target_menu_handler = a_handler set_configurable_target_menu_mode -- Set user interface mode to pop-up menu of targets. -- Target menu is configurable as the first option can be used to -- initiate a regular 'pick and drop' of the source pebble. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure -- from EV_PICK_AND_DROPABLE target_menu_mode_set: mode_is_configurable_target_menu set_deny_cursor (a_cursor: detachable like deny_cursor) -- Set a_cursor to be displayed when the screen pointer is not -- over a valid target. -- (from EV_PICK_AND_DROPABLE) ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE deny_cursor_assigned: attached a_cursor as l_deny_cursor implies l_deny_cursor ~ deny_cursor set_drag_and_drop_mode -- Set user interface mode to drag and drop. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure -- from EV_PICK_AND_DROPABLE drag_and_drop_set: mode_is_drag_and_drop set_pebble (a_pebble: ANY) -- Assign a_pebble to pebble. -- Overrides set_pebble_function. -- (from EV_PICK_AND_DROPABLE) require -- from EV_ABSTRACT_PICK_AND_DROPABLE a_pebble_not_void: a_pebble /= Void ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE pebble_assigned: pebble = a_pebble set_pebble_function (a_function: FUNCTION [detachable ANY]) -- Set a_function to compute pebble. -- It will be called once each time a pick occurs, the result -- will be assigned to pebble for the duration of transport. -- When a pick occurs, the pick position in widget coordinates, -- <<x, y>> in pixels, is passed. -- To handle this data use a_function of type -- FUNCTION [ANY, TUPLE [INTEGER, INTEGER], ANY] and return the -- pebble as a function of x and y. -- Overrides set_pebble. -- (from EV_PICK_AND_DROPABLE) require -- from EV_ABSTRACT_PICK_AND_DROPABLE a_function_not_void: a_function /= Void a_function_takes_two_integer_open_operands: a_function.valid_operands ([1, 1]) ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE pebble_function_assigned: pebble_function = a_function set_pebble_position (a_x, a_y: INTEGER_32) -- Set the initial position for pick and drop -- Coordinates are in pixels and are relative to position of Current. -- Pebble_positioning_enabled must be True for the position to be used, -- use enable_pebble_positioning. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure -- from EV_PICK_AND_DROPABLE pebble_position_assigned: pebble_x_position = a_x and pebble_y_position = a_y set_pick_and_drop_mode -- Set user interface mode to pick and drop. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure -- from EV_PICK_AND_DROPABLE pick_and_drop_set: mode_is_pick_and_drop set_target_data_function (a_function: FUNCTION [like pebble, EV_PND_TARGET_DATA]) -- Set a_function to compute target meta data based on transport source. -- Overrides any target_name set with set_target_name. -- (from EV_ABSTRACT_PICK_AND_DROPABLE) require -- from EV_ABSTRACT_PICK_AND_DROPABLE a_function_not_void: a_function /= Void ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE target_data_function_assigned: target_data_function /= Void and then target_data_function.is_equal (a_function) set_target_menu_mode -- Set user interface mode to pop-up menu of targets. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed ensure -- from EV_PICK_AND_DROPABLE target_menu_mode_set: mode_is_target_menu set_target_name (a_name: READABLE_STRING_GENERAL) -- Assign a_name to target_name. -- (from EV_ABSTRACT_PICK_AND_DROPABLE) require -- from EV_ABSTRACT_PICK_AND_DROPABLE a_name_not_void: a_name /= Void ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE target_name_assigned: attached target_name as l_target_name and then a_name /= l_target_name and then a_name.same_string (l_target_name) show_configurable_target_menu (a_x, a_y: INTEGER_32) -- Show the configurable target menu at position a_x, a_y relative to Current. -- (from EV_PICK_AND_DROPABLE) require -- from EV_PICK_AND_DROPABLE not_destroyed: not is_destroyed mode_is_configurable_target_menu: mode_is_configurable_target_menu configurable_menu_handler_set: configurable_target_menu_handler /= Void feature -- Cursor movement back -- Move to previous position. -- (from EV_DYNAMIC_LIST) require -- from BILINEAR not_before: not before finish -- Move cursor to last position. -- (No effect if empty) -- (from CHAIN) require -- from LINEAR True ensure then -- from CHAIN at_last: not is_empty implies islast forth -- Move cursor to next position. -- (from EV_DYNAMIC_LIST) require -- from LINEAR not_after: not after ensure then -- from LIST moved_forth: index = old index + 1 go_i_th (i: INTEGER_32) -- Move cursor to i-th position. -- (from EV_DYNAMIC_LIST) require -- from CHAIN valid_cursor_index: valid_cursor_index (i) ensure -- from CHAIN position_expected: index = i go_to (p: CURSOR) -- Move cursor to position p. -- (from EV_DYNAMIC_LIST) require -- from CURSOR_STRUCTURE cursor_position_valid: valid_cursor (p) move (i: INTEGER_32) -- Move cursor i positions. -- (from EV_DYNAMIC_LIST) ensure -- from CHAIN too_far_right: (old index + i > count) implies exhausted too_far_left: (old index + i < 1) implies exhausted expected_index: (not exhausted) implies (index = old index + i) search (v: like item) -- Move to first position (at or after current -- position) where item and v are equal. -- If structure does not include v ensure that -- exhausted will be true. -- (Reference or object equality, -- based on object_comparison.) -- (from BILINEAR) start -- Move cursor to first position. -- (from EV_DYNAMIC_LIST) require -- from TRAVERSABLE True ensure then -- from CHAIN at_first: not is_empty implies isfirst ensure then -- from EV_DYNAMIC_LIST empty_implies_after: is_empty implies after feature -- Element change append (s: SEQUENCE [like item]) -- Append a copy of s. Do not move cursor. -- (from EV_DYNAMIC_LIST) require -- from EV_DYNAMIC_LIST not_destroyed: not is_destroyed extendible: extendible sequence_not_void: s /= Void sequence_not_current: s /= Current not_parented: not s.there_exists (agent (v: like item): BOOLEAN ) ensure -- from EV_DYNAMIC_LIST count_increased: old count + s.count = count cursor_not_moved: (index = old index) or (after and old after) extend (v: like item) -- Add v to end. Do not move cursor. -- Was declared in EV_DYNAMIC_LIST as synonym of force. -- (from EV_DYNAMIC_LIST) require -- from EV_DYNAMIC_LIST not_destroyed: not is_destroyed extendible: extendible v_not_void: v /= Void v_parent_void: v.parent = Void v_not_current: not same (v) v_not_parent_of_current: not is_parent_recursive (v) ensure -- from EV_DYNAMIC_LIST parent_is_current: v.parent = Current v_is_last: v = last count_increased: count = old count + 1 cursor_not_moved: (index = old index) or (after and old after) fill (other: CONTAINER [EV_MENU_ITEM]) -- Fill with as many items of other as possible. -- The representations of other and current structure -- need not be the same. -- (from CHAIN) require -- from COLLECTION other_not_void: other /= Void extendible: extendible force (v: like item) -- Add v to end. Do not move cursor. -- Was declared in EV_DYNAMIC_LIST as synonym of extend. -- (from EV_DYNAMIC_LIST) require -- from EV_DYNAMIC_LIST not_destroyed: not is_destroyed extendible: extendible v_not_void: v /= Void v_parent_void: v.parent = Void v_not_current: not same (v) v_not_parent_of_current: not is_parent_recursive (v) ensure -- from EV_DYNAMIC_LIST parent_is_current: v.parent = Current v_is_last: v = last count_increased: count = old count + 1 cursor_not_moved: (index = old index) or (after and old after) dl_force (v: like item) -- Add v to end. -- (from SEQUENCE) require -- from SEQUENCE extendible: extendible ensure then -- from SEQUENCE new_count: count = old count + 1 item_inserted: has (v) merge_left (other: EV_MENU) -- Merge other into current structure before cursor -- position. Do not move cursor. Empty other. -- (from EV_DYNAMIC_LIST) require -- from DYNAMIC_CHAIN extendible: extendible not_before: not before other_exists: other /= Void not_current: other /= Current ensure -- from DYNAMIC_CHAIN new_count: count = old count + old other.count new_index: index = old index + old other.count other_is_empty: other.is_empty merge_right (other: EV_MENU) -- Merge other into current structure after cursor -- position. Do not move cursor. Empty other. -- (from EV_DYNAMIC_LIST) require -- from DYNAMIC_CHAIN extendible: extendible not_after: not after other_exists: other /= Void not_current: other /= Current ensure -- from DYNAMIC_CHAIN new_count: count = old count + old other.count same_index: index = old index other_is_empty: other.is_empty put (v: like item) -- Replace current item by v. -- (Synonym for replace) -- (from CHAIN) require -- from CHAIN writeable: writable replaceable: replaceable ensure -- from CHAIN same_count: count = old count is_inserted: is_inserted (v) sequence_put (v: like item) -- Add v to end. -- (from SEQUENCE) require -- from COLLECTION extendible: extendible ensure -- from COLLECTION item_inserted: is_inserted (v) ensure then -- from SEQUENCE new_count: count = old count + 1 put_front (v: like item) -- Add v at beginning. Do not move cursor. -- (from EV_DYNAMIC_LIST) require -- from EV_DYNAMIC_LIST not_destroyed: not is_destroyed extendible: extendible v_not_void: v /= Void v_parent_void: v.parent = Void v_not_current: not same (v) v_not_parent_of_current: not is_parent_recursive (v) ensure -- from EV_DYNAMIC_LIST parent_is_current: v.parent = Current v_is_first: v = first count_increased: count = old count + 1 cursor_not_moved: (index = old index + 1) or (before and old before) put_i_th (v: like item; i: INTEGER_32) -- Replace item at i-th position by v. -- (from EV_DYNAMIC_LIST) require -- from EV_DYNAMIC_LIST not_destroyed: not is_destroyed valid_index: i > 0 and i <= count v_not_void: v /= Void v_parent_void: v.parent = Void v_not_current: not same (v) v_not_parent_of_current: not is_parent_recursive (v) ensure -- from EV_DYNAMIC_LIST parent_is_current: v.parent = Current item_replaced: v = i_th (i) not_has_old_item: not has (old i_th (i)) old_item_parent_void: (old i_th (i)).parent = Void count_same: count = old count cursor_not_moved: index = old index put_left (v: like item) -- Add v to the left of cursor position. Do not move cursor. -- (from EV_DYNAMIC_LIST) require -- from EV_DYNAMIC_LIST not_destroyed: not is_destroyed extendible: extendible not_before: not before v_not_void: v /= Void v_parent_void: v.parent = Void v_not_current: not same (v) v_not_parent_of_current: not is_parent_recursive (v) ensure -- from EV_DYNAMIC_LIST parent_is_current: v.parent = Current v_at_index_plus_one: v = i_th (index - 1) count_increased: count = old count + 1 cursor_not_moved: index = old index + 1 put_right (v: like item) -- Add v to right of cursor position. Do not move cursor. -- (from EV_DYNAMIC_LIST) require -- from EV_DYNAMIC_LIST not_destroyed: not is_destroyed extendible: extendible not_after: not after v_not_void: v /= Void v_parent_void: v.parent = Void v_not_current: not same (v) v_not_parent_of_current: not is_parent_recursive (v) ensure -- from EV_DYNAMIC_LIST parent_is_current: v.parent = Current v_at_index_plus_one: v = i_th (index + 1) count_increased: count = old count + 1 cursor_not_moved: index = old index remove_pixmap -- Remove image displayed on Current. -- (from EV_PIXMAPABLE) require -- from EV_PIXMAPABLE not_destroyed: not is_destroyed ensure -- from EV_PIXMAPABLE pixmap_removed: pixmap = Void remove_text -- Make text is_empty. -- (from EV_TEXTABLE) require -- from EV_TEXTABLE not_destroyed: not is_destroyed ensure -- from EV_TEXTABLE text_empty: text.is_empty replace (v: like item) -- Replace current item by v. -- (from EV_DYNAMIC_LIST) require -- from EV_DYNAMIC_LIST not_destroyed: not is_destroyed writable: writable v_not_void: v /= Void v_parent_void: v.parent = Void v_not_current: not same (v) v_not_parent_of_current: not is_parent_recursive (v) ensure -- from EV_DYNAMIC_LIST parent_is_current: v.parent = Current item_replaced: v = item not_has_old_item: not has (old item) old_item_parent_void: (old item).parent = Void count_same: count = old count cursor_not_moved: index = old index set_data (some_data: like data) -- Assign some_data to data. -- (from EV_ANY) require -- from EV_ANY not_destroyed: not is_destroyed ensure -- from EV_ANY data_assigned: data = some_data set_identifier_name (a_name: READABLE_STRING_GENERAL) -- Set identifier_name to a_name. -- (from EV_IDENTIFIABLE) require -- from EV_IDENTIFIABLE a_name_not_void: a_name /= Void a_name_not_empty: not a_name.is_empty no_period_in_name: not a_name.has ('.'.to_character_32) no_special_regexp_characters_in_name: ensure -- from EV_IDENTIFIABLE identifier_name_set: identifier_name.same_string_general (a_name) set_pixmap (a_pixmap: EV_PIXMAP) -- Display image of a_pixmap on Current. -- Image of pixmap will be a copy of a_pixmap. -- Image may be scaled in some descendents, i.e EV_TREE_ITEM -- See EV_TREE.set_pixmaps_size. -- (from EV_PIXMAPABLE) require -- from EV_PIXMAPABLE not_destroyed: not is_destroyed pixmap_not_void: a_pixmap /= Void set_text (a_text: separate READABLE_STRING_GENERAL) -- Assign a_text to text. -- (from EV_TEXTABLE) require -- from EV_TEXTABLE not_destroyed: not is_destroyed a_text_not_void: a_text /= Void no_carriage_returns: not a_text.has_code (('%R').natural_32_code) ensure -- from EV_TEXTABLE text_cloned: text.same_string_general (create {STRING_32}.make_from_separate (a_text)) and then text /= a_text swap (i: INTEGER_32) -- Exchange_item at i-th position with item -- at cursor position. -- (from EV_DYNAMIC_LIST) require -- from CHAIN not_off: not off valid_index: valid_index (i) ensure -- from CHAIN swapped_to_item: item = old i_th (i) swapped_from_item: i_th (i) = old item feature -- Removal prune (v: like item) -- Remove v if present. Do not move cursor, except if -- cursor was on v, move to right neighbor. -- (from EV_DYNAMIC_LIST) ensure then -- from EV_DYNAMIC_LIST not_has_v: not has (v) had_item_implies_parent_void: old has (v) implies (v /= Void and then v.parent = Void) had_item_implies_count_decreased: old has (v) implies count = old count - 1 had_item_and_was_after_implies_index_decreased: (old after and old has (v)) implies index = old index - 1 prune_all (v: like item) -- Remove all occurrences of v. -- (Reference or object equality, -- based on object_comparison.) -- Leave structure exhausted. -- (from DYNAMIC_CHAIN) require -- from COLLECTION prunable: prunable ensure -- from COLLECTION no_more_occurrences: not has (v) ensure then -- from DYNAMIC_CHAIN is_exhausted: exhausted remove -- Remove current item. Move cursor to right neighbor. -- (or after if no right neighbor). -- (from EV_DYNAMIC_LIST) require -- from ACTIVE prunable: prunable writable: writable ensure then -- from DYNAMIC_LIST after_when_empty: is_empty implies after ensure then -- from EV_DYNAMIC_LIST v_removed: not has (old item) parent_void: (old item).parent = Void count_decreased: count = old count - 1 index_same: index = old index remove_left -- Remove item to left of cursor position. -- Do not move cursor. -- (from EV_DYNAMIC_LIST) require -- from DYNAMIC_CHAIN left_exists: index > 1 ensure -- from DYNAMIC_CHAIN new_count: count = old count - 1 new_index: index = old index - 1 ensure then -- from EV_DYNAMIC_LIST left_neighbor_removed: not has (old i_th (index - 1)) parent_void: (old i_th (index - 1)).parent = Void index_decreased: index = old index - 1 remove_right -- Remove item to right of cursor position. -- Do not move cursor. -- (from EV_DYNAMIC_LIST) require -- from DYNAMIC_CHAIN right_exists: index < count ensure -- from DYNAMIC_CHAIN new_count: count = old count - 1 same_index: index = old index ensure then -- from EV_DYNAMIC_LIST right_neighbor_removed: not has (old i_th (index + 1)) parent_void: (old i_th (index + 1)).parent = Void index_same: index = old index wipe_out -- Remove all items. -- (from EV_DYNAMIC_LIST) ensure then -- from DYNAMIC_LIST is_before: before feature -- Conversion linear_representation: LINEAR [EV_MENU_ITEM] -- Representation as a linear structure -- (from LINEAR) require -- from CONTAINER True feature -- Duplication copy (other: EV_MENU) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from EV_ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen deep_copy (other: EV_MENU) -- Effect equivalent to that of: -- copy (other . deep_twin) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: EV_MENU -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: EV_MENU) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: EV_MENU -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: EV_MENU -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations frozen default: detachable EV_MENU -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class feature -- Implementation Changeable_comparison_criterion: BOOLEAN = False -- May object_comparison be changed? -- (Answer: no by default. -- (from EV_ITEM_LIST) feature -- Command destroy -- Destroy underlying native toolkit object. -- Render Current unusable. -- (from EV_ANY) ensure -- from EV_ANY is_destroyed: is_destroyed feature -- Contract support is_parent_recursive (a_list: like item): BOOLEAN -- Is Current present in a_list hierarchy? -- (from EV_MENU_ITEM_LIST) require -- from EV_DYNAMIC_LIST a_list_not_void: a_list /= Void not_destroyed: not is_destroyed same (other: EV_ANY): BOOLEAN -- Is other Current? -- (from EV_DYNAMIC_LIST) feature -- Event handling conforming_pick_actions: EV_NOTIFY_ACTION_SEQUENCE -- Actions to be performed when a pebble that fits here is picked. -- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES) require -- from EV_ABSTRACT_PICK_AND_DROPABLE True ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES not_void: Result /= Void drop_actions: EV_PND_ACTION_SEQUENCE -- Actions to be performed when a pebble is dropped here. -- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES) require -- from EV_ABSTRACT_PICK_AND_DROPABLE True ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES not_void: Result /= Void item_select_actions: EV_MENU_ITEM_SELECT_ACTION_SEQUENCE -- Actions to be performed when a menu item is selected. -- (from EV_MENU_ITEM_LIST_ACTION_SEQUENCES) ensure -- from EV_MENU_ITEM_LIST_ACTION_SEQUENCES not_void: Result /= Void pick_actions: EV_PND_START_ACTION_SEQUENCE -- Actions to be performed when pebble is picked up. -- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES) require -- from EV_ABSTRACT_PICK_AND_DROPABLE True ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES not_void: Result /= Void pick_ended_actions: EV_PND_FINISHED_ACTION_SEQUENCE -- Actions to be performed when a transport from Current ends. -- If transport completed successfully, then event data -- is target. If cancelled, then event data is Void. -- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES) ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES not_void: Result /= Void pointer_button_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE -- Actions to be performed when screen pointer button is pressed. -- (from EV_ITEM_ACTION_SEQUENCES) ensure -- from EV_ITEM_ACTION_SEQUENCES not_void: Result /= Void pointer_double_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE -- Actions to be performed when screen pointer is double clicked. -- (from EV_ITEM_ACTION_SEQUENCES) ensure -- from EV_ITEM_ACTION_SEQUENCES not_void: Result /= Void pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE -- Actions to be performed when screen pointer moves. -- (from EV_ITEM_ACTION_SEQUENCES) require -- from EV_ABSTRACT_PICK_AND_DROPABLE True ensure -- from EV_ITEM_ACTION_SEQUENCES not_void: Result /= Void select_actions: EV_NOTIFY_ACTION_SEQUENCE -- Actions to be performed when selected. -- (from EV_MENU_ITEM_ACTION_SEQUENCES) ensure -- from EV_MENU_ITEM_ACTION_SEQUENCES not_void: Result /= Void feature -- Iteration do_all (action: PROCEDURE [EV_MENU_ITEM]) -- Apply action to every item. -- Semantics not guaranteed if action changes the structure; -- in such a case, apply iterator to clone of structure instead. -- (from LINEAR) require -- from TRAVERSABLE action_exists: action /= Void do_if (action: PROCEDURE [EV_MENU_ITEM]; test: FUNCTION [EV_MENU_ITEM, BOOLEAN]) -- Apply action to every item that satisfies test. -- Semantics not guaranteed if action or test changes the structure; -- in such a case, apply iterator to clone of structure instead. -- (from LINEAR) require -- from TRAVERSABLE action_exists: action /= Void test_exists: test /= Void for_all (test: FUNCTION [EV_MENU_ITEM, BOOLEAN]): BOOLEAN -- Is test true for all items? -- Semantics not guaranteed if test changes the structure; -- in such a case, apply iterator to clone of structure instead. -- (from LINEAR) require -- from TRAVERSABLE test_exists: test /= Void ensure then -- from LINEAR empty: is_empty implies Result there_exists (test: FUNCTION [EV_MENU_ITEM, BOOLEAN]): BOOLEAN -- Is test true for at least one item? -- Semantics not guaranteed if test changes the structure; -- in such a case, apply iterator to clone of structure instead. -- (from LINEAR) require -- from TRAVERSABLE test_exists: test /= Void feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void feature -- Standard operations show -- Pop up on the current pointer position. require not_destroyed: not is_destroyed not_parented: parent = Void show_at (a_widget: detachable EV_WIDGET; a_x, a_y: INTEGER_32) -- Pop up on a_x, a_y relative to the top-left corner -- of a_widget or relative to the screen if a_widget is Void. require not_destroyed: not is_destroyed not_parented: parent = Void widget_not_destroyed: a_widget /= Void implies not a_widget.is_destroyed widget_displayed: a_widget /= Void implies a_widget.is_displayed feature -- Status Report is_destroyed: BOOLEAN -- Is Current no longer usable? -- (from EV_ANY) ensure -- from EV_ANY bridge_ok: Result = implementation.is_destroyed invariant one_selected_radio_item_per_separator: is_usable implies one_selected_radio_item_per_separator -- from EV_PICK_AND_DROPABLE user_interface_modes_mutually_exclusive: mode_is_pick_and_drop.to_integer + mode_is_drag_and_drop.to_integer + mode_is_target_menu.to_integer = 1 -- from EV_ANY is_initialized: is_initialized default_create_called: default_create_called is_coupled: default_create_called implies (implementation.interface = Current or (attached {EV_ENVIRONMENT} Current and then attached implementation.interface)) -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) -- from EV_POSITIONED width_not_negative: is_usable implies width >= 0 height_not_negative: is_usable implies height >= 0 minimum_width_not_negative: is_usable implies minimum_width >= 0 minimum_height_not_negative: is_usable implies minimum_height >= 0 -- from EV_MENU_ITEM_LIST item_select_actions_not_void: is_usable implies item_select_actions /= Void -- from EV_ITEM_LIST parent_of_items_is_current: is_usable and then not is_empty implies parent_of_items_is_current items_unique: is_usable and not is_empty implies items_unique -- from LIST before_definition: before = (index = 0) after_definition: after = (index = count + 1) -- from CHAIN non_negative_index: index >= 0 index_small_enough: index <= count + 1 off_definition: off = ((index = 0) or (index = count + 1)) isfirst_definition: isfirst = ((not is_empty) and (index = 1)) islast_definition: islast = ((not is_empty) and (index = count)) item_corresponds_to_index: (not off) implies (item = i_th (index)) -- from ACTIVE writable_constraint: writable implies readable empty_constraint: is_empty implies (not readable) and (not writable) -- from READABLE_INDEXABLE consistent_boundaries: Lower <= count or else Lower = count + 1 -- from BILINEAR not_both: not (after and before) before_constraint: before implies off -- from LINEAR after_constraint: after implies off -- from TRAVERSABLE empty_constraint: is_empty implies off -- from FINITE empty_definition: is_empty = (count = 0) note copyright: "Copyright (c) 1984-2006, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 356 Storke Road, Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class EV_MENU
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