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note description: "Eiffel Vision widget, implementation interface.%NSee bridge pattern notes in ev_any.e" legal: "See notice at end of class." status: "See notice at end of class." keywords: "widget, component, control" date: "$Date: 2015-12-17 05:34:17 -0800 (Thu, 17 Dec 2015) $" revision: "$Revision: 98279 $" deferred class interface EV_WIDGET_I feature -- Access accept_cursor: detachable EV_POINTER_STYLE -- Accept cursor set by user. -- To be displayed when the screen pointer is over a target that accepts -- pebble during pick and drop. -- (from EV_PICK_AND_DROPABLE_I) actual_drop_target_agent: detachable FUNCTION [INTEGER_32, INTEGER_32, detachable EV_ABSTRACT_PICK_AND_DROPABLE] -- Overrides default drop target on a certain position. -- If Void, will use the default drop target. -- Always void if Current is not a widget. frozen background_color: EV_COLOR -- Color displayed behind foreground features. -- (from EV_COLORIZABLE_I) configurable_target_menu_handler: detachable PROCEDURE [EV_MENU, ARRAYED_LIST [EV_PND_TARGET_DATA], EV_PICK_AND_DROPABLE, detachable ANY] -- (from EV_PICK_AND_DROPABLE_I) default_key_processing_handler: detachable PREDICATE [EV_KEY] -- Agent used to determine whether the default key processing should occur for Current. -- If agent returns True then default key processing continues as normal, False prevents -- default key processing from occurring. deny_cursor: detachable EV_POINTER_STYLE -- Deny cursor set by user. -- To be displayed when the screen pointer is not over a valid target. -- (from EV_PICK_AND_DROPABLE_I) frozen foreground_color: EV_COLOR -- Color of foreground features like text. -- (from EV_COLORIZABLE_I) generating_type: TYPE [detachable EV_WIDGET_I] -- 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 help_context: detachable FUNCTION [EV_HELP_CONTEXT] -- Agent that evaluates to help context sent to help engine when help is requested -- (from EV_HELP_CONTEXTABLE_I) ensure -- from EV_HELP_CONTEXTABLE_I current_if_exists: internal_help_context /= Void implies Result = internal_help_context internal_pointer_style: EV_POINTER_STYLE -- Cursor displayed when screen pointer is over current widget, -- as seen from interface. is_dock_executing: BOOLEAN -- Is Current in the process of a dockable transport? -- (from EV_DOCKABLE_SOURCE_I) is_dockable: BOOLEAN -- Is Current dockable? -- (from EV_DOCKABLE_SOURCE_I) is_external_docking_enabled: BOOLEAN -- Is Current able to be docked into an EV_DOCKABLE_DIALOG -- When there is no valid EV_DRAGABLE_TARGET upon completion -- of the transport? -- (from EV_DOCKABLE_SOURCE_I) is_external_docking_relative: BOOLEAN -- Will dockable dialog displayed when Current is docked externally -- be displayed relative to parent window of Current? -- Otherwise displayed as a standard window. -- (from EV_DOCKABLE_SOURCE_I) not_external_docking_enabled: BOOLEAN -- Attribute used for is_externally_dockable. We must implement -- is_externally_dockable this way as we have no easy solution to -- assign True to is_externally_dockable. -- (from EV_DOCKABLE_SOURCE_I) not_is_external_docking_relative: BOOLEAN -- Will dockable dialog displayed when Current is docked externally -- be displayed relative to parent window of Current? -- Otherwise displayed as a standard window. -- Internal reversed value of is_external_docking_relative as we cannot -- easily initialize a BOOLE to True in this case. -- (from EV_DOCKABLE_SOURCE_I) original_parent_position: INTEGER_32 -- Original position in parent. Required -- to restore widget later. -- (from EV_DOCKABLE_SOURCE_I) parent: detachable EV_CONTAINER -- Container widget that contains Current. -- (Void if Current is not in a container) pebble: detachable ANY -- Data to be transported by pick and drop mechanism. -- (from EV_PICK_AND_DROPABLE_I) pebble_function: detachable FUNCTION [detachable ANY] -- Returns data to be transported by pick and drop mechanism. -- (from EV_PICK_AND_DROPABLE_I) 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_I) pebble_x_position: INTEGER_32 -- Initial x position for pick and drop relative to Current. -- (from EV_PICK_AND_DROPABLE_I) pebble_y_position: INTEGER_32 -- Initial y position for pick and drop relative to Current. -- (from EV_PICK_AND_DROPABLE_I) pointer_position: EV_COORDINATE -- Position of the screen pointer relative to Current. ensure result_not_void: Result /= Void pointer_style: detachable EV_POINTER_STYLE -- Cursor displayed when screen pointer is over current widget. -- Void if none has been set using set_pointer_position. real_source: detachable EV_DOCKABLE_SOURCE -- Result is EV_DOCKABLE_SOURCE which should be -- dragged when docking begins on Current. -- (from EV_DOCKABLE_SOURCE_I) real_target: detachable EV_DOCKABLE_TARGET -- Result is target used during a dockable transport if -- mouse pointer is above Current. feature -- Measurement height: INTEGER_32 -- Vertical size in pixels. -- (from EV_POSITIONED_I) minimum_height: INTEGER_32 -- Minimum vertical size in pixels. -- (from EV_POSITIONED_I) minimum_width: INTEGER_32 -- Minimum horizontal size in pixels. -- (from EV_POSITIONED_I) screen_x: INTEGER_32 -- Horizontal offset relative to screen. screen_y: INTEGER_32 -- Vertical offset relative to screen. width: INTEGER_32 -- Horizontal size in pixels. -- (from EV_POSITIONED_I) x_position: INTEGER_32 -- Horizontal offset relative to parent x_position in pixels. -- (from EV_POSITIONED_I) y_position: INTEGER_32 -- Vertical offset relative to parent y_position in pixels. -- (from EV_POSITIONED_I) 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_WIDGET_I): 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_WIDGET_I): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result 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_WIDGET_I): 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 closest_dockable_target: detachable EV_DOCKABLE_TARGET -- Result is first dockable target that is_dockable found by recursively -- searching up through the parenting structure from the widget -- currently underneath the pointer position. -- Result will be Void if a dockable target is not found. -- (from EV_DOCKABLE_SOURCE_I) ensure -- from EV_DOCKABLE_SOURCE_I result_is_dockable: Result /= Void implies Result.is_docking_enabled 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 get_next_target (a_widget: EV_WIDGET): detachable EV_DOCKABLE_TARGET -- Result is next dockable target that is is_dockable found by -- recursively seraching up the parenting structure from current_target. -- Result will be Void if none. -- (from EV_DOCKABLE_SOURCE_I) require -- from EV_DOCKABLE_SOURCE_I a_widget_not_void: a_widget /= Void ensure -- from EV_DOCKABLE_SOURCE_I result_is_dockable: Result /= Void implies Result.is_docking_enabled internal_non_sensitive: BOOLEAN -- Is Current not sensitive to input as seen -- from interface? -- (from EV_SENSITIVE_I) is_destroyed: BOOLEAN -- Is Current no longer usable? -- (from EV_ANY_I) is_transport_enabled: BOOLEAN -- Is the transport mechanism enabled? -- (from EV_PICK_AND_DROPABLE_I) mode_is_configurable_target_menu: BOOLEAN -- Is the transport mechanism a configurable target menu? -- (from EV_PICK_AND_DROPABLE_I) mode_is_drag_and_drop: BOOLEAN -- Is the transport mechanism drag and drop? -- (from EV_PICK_AND_DROPABLE_I) mode_is_pick_and_drop: BOOLEAN -- Is the transport mechanism pick and drop? -- (from EV_PICK_AND_DROPABLE_I) mode_is_target_menu: BOOLEAN -- Is the transport mechanism a target menu? -- (from EV_PICK_AND_DROPABLE_I) 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)) user_is_sensitive: BOOLEAN -- Is the object sensitive to user input. -- (from EV_SENSITIVE_I) feature -- Status setting disable_dockable -- Ensure Current is not dockable -- (from EV_DOCKABLE_SOURCE_I) ensure -- from EV_DOCKABLE_SOURCE_I not_is_dockable: not is_dockable disable_external_docking -- Forbid Current to be docked into an EV_DOCKABLE_DIALOG -- When there is no valid EV_DRAGABLE_TARGET upon completion -- of the transport? -- (from EV_DOCKABLE_SOURCE_I) require -- from EV_DOCKABLE_SOURCE_I is_dockable: is_dockable ensure -- from EV_DOCKABLE_SOURCE_I not_externally_dockable: not is_external_docking_enabled disable_external_docking_relative -- Assign False to is_external_docking_relative, ensuring that -- a dockable dialog displayed when Current is docked externally -- is displayed as a standard window. -- (from EV_DOCKABLE_SOURCE_I) require -- from EV_DOCKABLE_SOURCE_I external_docking_enabled: is_external_docking_enabled ensure -- from EV_DOCKABLE_SOURCE_I external_docking_not_relative: not is_external_docking_relative disable_pebble_positioning -- Assign False to pebble_positioning_enabled. -- (from EV_PICK_AND_DROPABLE_I) disable_transport -- Deactivate pick/drag and drop mechanism. -- (from EV_PICK_AND_DROPABLE_I) ensure -- from EV_PICK_AND_DROPABLE_I is_transport_disabled: not is_transport_enabled enable_dockable -- Allow Current to be dockable -- (from EV_DOCKABLE_SOURCE_I) ensure -- from EV_DOCKABLE_SOURCE_I is_dockable: is_dockable enable_external_docking -- Allow Current to be docked into an EV_DOCKABLE_DIALOG -- When there is no valid EV_DRAGABLE_TARGET upon completion -- of the transport? -- (from EV_DOCKABLE_SOURCE_I) require -- from EV_DOCKABLE_SOURCE_I is_dockable: is_dockable ensure -- from EV_DOCKABLE_SOURCE_I is_externally_dockable: is_external_docking_enabled enable_external_docking_relative -- Assign True to is_external_docking_relative, ensuring that -- a dockable dialog displayed when Current is docked externally -- is displayed relative to the top level window. -- (from EV_DOCKABLE_SOURCE_I) require -- from EV_DOCKABLE_SOURCE_I external_docking_enabled: is_external_docking_enabled ensure -- from EV_DOCKABLE_SOURCE_I external_docking_not_relative: is_external_docking_relative enable_pebble_positioning -- Assign True to pebble_positioning_enabled. -- (from EV_PICK_AND_DROPABLE_I) enable_transport -- Activate pick/drag and drop mechanism. -- (from EV_PICK_AND_DROPABLE_I) require -- from EV_PICK_AND_DROPABLE_I pebble_not_void: pebble /= Void or pebble_function /= Void ensure -- from EV_PICK_AND_DROPABLE_I is_transport_enabled: is_transport_enabled hide -- Request that Current not be displayed when its parent is. internal_disable_dockable -- Platform specific implementation of disable_dockable. -- (from EV_DOCKABLE_SOURCE_I) internal_enable_dockable -- Platform specific implementation of enable_dockable. -- (from EV_DOCKABLE_SOURCE_I) remove_default_key_processing_handler -- Ensure default_key_processing_handler is Void. ensure default_key_processing_handler_removed: default_key_processing_handler = Void remove_pebble -- Remove pebble. -- (from EV_PICK_AND_DROPABLE_I) ensure -- from EV_PICK_AND_DROPABLE_I pebble_removed: pebble = Void and pebble_function = Void is_transport_disabled: not is_transport_enabled remove_real_source -- Ensure real_source is Void. -- (from EV_DOCKABLE_SOURCE_I) require -- from EV_DOCKABLE_SOURCE_I is_dockable: is_dockable ensure -- from EV_DOCKABLE_SOURCE_I real_source_void: real_source = Void remove_real_target -- Ensure real_target is Void. ensure real_target_void: real_target = Void reset_pebble_function -- Reset any values created by calling pebble_function. -- (from EV_PICK_AND_DROPABLE_I) ensure -- from EV_PICK_AND_DROPABLE_I pebble_function_preserved: pebble_function = old pebble_function pebble_without_function: pebble_function = Void implies (pebble = old pebble) pebble_with_function: pebble_function /= Void implies pebble = Void set_accept_cursor (a_cursor: 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_I) set_actual_drop_target_agent (an_agent: like actual_drop_target_agent) -- Assign an_agent to actual_drop_target_agent. require an_agent_not_void: an_agent /= Void ensure assigned: actual_drop_target_agent = an_agent set_configurable_target_menu_handler (a_handler: like configurable_target_menu_handler) -- Set Configurable Target Menu Handler to a_handler. -- (from EV_PICK_AND_DROPABLE_I) set_configurable_target_menu_mode -- Set transport mechanism to a configurable target_menu. -- (from EV_PICK_AND_DROPABLE_I) ensure -- from EV_PICK_AND_DROPABLE_I mode_is_target_menu: mode_is_configurable_target_menu set_default_colors -- Set foreground and background color to their default values. -- (from EV_COLORIZABLE_I) set_default_key_processing_handler (a_handler: like default_key_processing_handler) -- Assign default_key_processing_handler to a_handler. set_deny_cursor (a_cursor: like deny_cursor) -- Set a_cursor to be displayed when the screen pointer is over a -- target that doesn't accept pebble during pick and drop. -- (from EV_PICK_AND_DROPABLE_I) set_drag_and_drop_mode -- Set transport mechanism to drag and drop, -- (from EV_PICK_AND_DROPABLE_I) ensure -- from EV_PICK_AND_DROPABLE_I mode_is_drag_and_drop: mode_is_drag_and_drop set_focus -- Grab keyboard focus. set_pebble (a_pebble: ANY) -- Assign a_pebble to pebble. -- (from EV_PICK_AND_DROPABLE_I) require -- from EV_PICK_AND_DROPABLE_I a_pebble_not_void: a_pebble /= Void ensure -- from EV_PICK_AND_DROPABLE_I pebble_assigned: pebble = a_pebble is_transport_enabled: is_transport_enabled set_pebble_function (a_function: FUNCTION [detachable ANY]) -- Assign a_function to pebble_function. -- (from EV_PICK_AND_DROPABLE_I) require -- from EV_PICK_AND_DROPABLE_I a_function_not_void: a_function /= Void ensure -- from EV_PICK_AND_DROPABLE_I pebble_function_assigned: pebble_function = a_function is_transport_enabled: is_transport_enabled set_pebble_position (a_x, a_y: INTEGER_32) -- Set the initial position for pick and drop relative to Current. -- (from EV_PICK_AND_DROPABLE_I) ensure -- from EV_PICK_AND_DROPABLE_I pick_x_assigned: pick_x.to_integer_32 = a_x pick_y_assigned: pick_y.to_integer_32 = a_y set_pick_and_drop_mode -- Set transport mechanism to pick and drop, -- (from EV_PICK_AND_DROPABLE_I) ensure -- from EV_PICK_AND_DROPABLE_I mode_is_pick_and_drop: mode_is_pick_and_drop set_real_source (dockable_source: EV_DOCKABLE_SOURCE) -- Set dockable_source to be the widget moved when a -- drag begins on Current. -- (from EV_DOCKABLE_SOURCE_I) require -- from EV_DOCKABLE_SOURCE_I is_dockable: is_dockable dockable_source_not_void: dockable_source /= Void ensure -- from EV_DOCKABLE_SOURCE_I real_source_assigned: real_source = dockable_source set_real_target (a_target: EV_DOCKABLE_TARGET) -- Assign a_target to real_target. require target_not_void: a_target /= Void ensure assigned: real_target = a_target set_target_menu_mode -- Set transport mechanism to a target_menu. -- (from EV_PICK_AND_DROPABLE_I) ensure -- from EV_PICK_AND_DROPABLE_I mode_is_target_menu: mode_is_target_menu show -- Request that Current be displayed when its parent is. 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_I) user_disable_sensitive -- Make object desensitive to user input. -- (from EV_SENSITIVE_I) ensure -- from EV_SENSITIVE_I is_desensitive: not user_is_sensitive user_enable_sensitive -- Make object sensitive to user input. -- (from EV_SENSITIVE_I) ensure -- from EV_SENSITIVE_I is_sensitive_if_parent_sensitive: (has_parent and then parent_is_sensitive) implies attached_interface.implementation.is_sensitive is_sensitive_if_orphaned: not has_parent implies attached_interface.implementation.is_sensitive feature -- Element change remove_help_context -- Remove key press action associated with EV_APPLICATION.help_key. -- (from EV_HELP_CONTEXTABLE_I) require -- from EV_HELP_CONTEXTABLE_I help_context_not_void: help_context /= Void ensure -- from EV_HELP_CONTEXTABLE_I no_help_context: internal_help_context = Void set_background_color (a_color: like background_color) -- Assign a_color to foreground_color. -- (from EV_COLORIZABLE_I) require -- from EV_COLORIZABLE_I a_color_not_void: a_color /= Void ensure -- from EV_COLORIZABLE_I background_color_assigned: is_initialized implies background_color.is_equal (a_color) set_foreground_color (a_color: like foreground_color) -- Assign a_color to foreground_color. -- (from EV_COLORIZABLE_I) require -- from EV_COLORIZABLE_I a_color_not_void: a_color /= Void ensure -- from EV_COLORIZABLE_I foreground_color_assigned: is_initialized implies foreground_color.is_equal (a_color) set_help_context (an_help_context: like help_context) -- Assign a_help_context to help_context. -- Assign an_help_context to help_context. -- (from EV_HELP_CONTEXTABLE_I) require -- from EV_HELP_CONTEXTABLE_I an_help_context_not_void: an_help_context /= Void ensure -- from EV_HELP_CONTEXTABLE_I help_context_assigned: attached help_context as l_help_context and then l_help_context ~ an_help_context set_minimum_height (a_minimum_height: INTEGER_32) -- Set the minimum vertical size to a_minimum_height in pixels. require a_minimum_height_positive: a_minimum_height >= 0 ensure minimum_height_assigned: is_usable implies ((a_minimum_height > 0 implies attached_interface.minimum_height = a_minimum_height) or (a_minimum_height = 0 implies (attached_interface.minimum_height <= 1))) set_minimum_size (a_minimum_width, a_minimum_height: INTEGER_32) -- Set the minimum horizontal size to a_minimum_width in pixels. -- Set the minimum vertical size to a_minimum_height in pixels. require a_minimum_width_positive: a_minimum_width >= 0 a_minimum_height_positive: a_minimum_height >= 0 ensure minimum_width_assigned: is_usable implies ((a_minimum_width > 0 implies attached_interface.minimum_width = a_minimum_width) or (a_minimum_width = 0 implies (attached_interface.minimum_width <= 1))) minimum_height_assigned: is_usable implies ((a_minimum_height > 0 implies attached_interface.minimum_height = a_minimum_height) or (a_minimum_height = 0 implies (attached_interface.minimum_height <= 1))) set_minimum_width (a_minimum_width: INTEGER_32) -- Set the minimum horizontal size to a_minimum_width in pixels. require a_minimum_width_positive: a_minimum_width >= 0 ensure minimum_width_assigned: is_usable implies ((a_minimum_width > 0 implies attached_interface.minimum_width = a_minimum_width) or (a_minimum_width = 0 implies (attached_interface.minimum_width <= 1))) feature -- Duplication copy (other: EV_WIDGET_I) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from 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_WIDGET_I) -- 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_WIDGET_I -- 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_WIDGET_I) -- 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_WIDGET_I -- 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_WIDGET_I -- 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 close_dockable_dialog (dockable_dialog: EV_DOCKABLE_DIALOG) -- Close request received by dockable_dialog so -- restore widget contained back to its original position -- in its old parent if possible. -- We must fire dock_ended actions. -- (from EV_DOCKABLE_SOURCE_I) ensure -- from EV_DOCKABLE_SOURCE_I dockable_dialog_destroyed: dockable_dialog.is_destroyed complete_dock -- Complete a dock from source_being_docked. -- (from EV_DOCKABLE_SOURCE_I) require -- from EV_DOCKABLE_SOURCE_I source_being_docked: source_being_docked /= Void ensure -- from EV_DOCKABLE_SOURCE_I not_dock_executing: not is_dock_executing insert_separator_not_parented: Insert_sep.parent = Void insert_label_not_parented: Insert_label.parent = Void frozen default: detachable EV_WIDGET_I -- 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 refresh_now -- Force an immediate redraw of Current. feature -- Inapplicable Drag_cursor: EV_POINTER_STYLE -- Cursor used when Current is being transported. -- (from EV_DOCKABLE_SOURCE_I) feature -- Access EV_DRAGABLE_SOURCE. dockable_dialog_target: detachable EV_DOCKABLE_DIALOG -- A dockable dialog that will be created as -- necessary. This is not a local, to avoid it -- being garbage collected. -- (from EV_SHARED_TRANSPORT_I) Global_drag_targets: ARRAYED_LIST [INTEGER_32] -- Shortcut to EV_APPLICATION.pnd_targets. -- (from EV_SHARED_TRANSPORT_I) frozen Insert_label: EV_CELL -- Label used to indicate where Current will be placed in target. -- (from EV_SHARED_TRANSPORT_I) ensure -- from EV_SHARED_TRANSPORT_I result_not_void: Result /= Void Insert_label_imp: EV_CELL_I -- Once access to implementation of Insert_label. -- (from EV_SHARED_TRANSPORT_I) ensure -- from EV_SHARED_TRANSPORT_I Result /= Void Insert_sep: EV_TOOL_BAR_SEPARATOR -- Once access to a separator used to indicate the insertion position -- when moving tool bar items. -- (from EV_SHARED_TRANSPORT_I) Insert_sep_imp: EV_TOOL_BAR_SEPARATOR_I -- Once access to implementation of Insert_sep. -- (from EV_SHARED_TRANSPORT_I) ensure -- from EV_SHARED_TRANSPORT_I Result /= Void Internal_screen: EV_SCREEN -- Once access to an EV_SCREEN. -- (from EV_SHARED_TRANSPORT_I) original_x_offset: INTEGER_16 -- Original x_offset and original_y_offset of transport -- realtive to widget. Only used for dragable transports. -- (from EV_SHARED_TRANSPORT_I) original_y_offset: INTEGER_16 -- Original x_offset and original_y_offset of transport -- realtive to widget. Only used for dragable transports. -- (from EV_SHARED_TRANSPORT_I) originating_source: detachable EV_DOCKABLE_SOURCE_I -- Dragable source that originated the transport of source_being_dragged. -- (from EV_SHARED_TRANSPORT_I) remove_insert_label -- Remove Insert_label from its current parent. -- We must handle a special case for cells. If the parent is a cell, -- then we remove the cell from its parent, and then restore it. -- Otherwise, when the label, removed, the cell keeps it size, and cells -- are normally used with real_target when the cell must -- not be visible. -- (from EV_SHARED_TRANSPORT_I) ensure -- from EV_SHARED_TRANSPORT_I not_parented: Insert_label.parent = Void remove_insert_sep -- Ensure inset_sep is not parented. -- (from EV_SHARED_TRANSPORT_I) ensure -- from EV_SHARED_TRANSPORT_I not_parented: Insert_sep.parent = Void source_being_docked: detachable EV_DOCKABLE_SOURCE_I -- Dragable source currently being transported. May be a -- WIDGET_IMP or an EV_TOOL_BAR_BUTTON_IMP. -- (from EV_SHARED_TRANSPORT_I) feature -- Access EV_PICK_AND_DROPABLE. Default_accept_cursor: EV_POINTER_STYLE -- Used in lieu of a user defined accept_cursor. -- (from EV_SHARED_TRANSPORT_I) Default_deny_cursor: EV_POINTER_STYLE -- Used in lieu of a user defined deny_cursor. -- (from EV_SHARED_TRANSPORT_I) Default_pixmaps: EV_STOCK_PIXMAPS -- Default pixmaps -- (from EV_SHARED_TRANSPORT_I) Global_pnd_targets: HASH_TABLE [INTEGER_32, INTEGER_32] -- Shortcut to EV_APPLICATION.pnd_targets. -- (from EV_SHARED_TRANSPORT_I) rubber_band_is_drawn: BOOLEAN -- Is a rubber band line currently on the screen? -- (from EV_SHARED_TRANSPORT_I) feature -- Access common. pointer_x: INTEGER_16 -- (from EV_SHARED_TRANSPORT_I) pointer_y: INTEGER_16 -- (from EV_SHARED_TRANSPORT_I) 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_I) ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I not_void: Result /= Void dock_ended_actions: EV_NOTIFY_ACTION_SEQUENCE -- Actions to be performed after a dock completes from Current. -- Either to a dockable target or a dockable dialog. -- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I) ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I not_void: Result /= Void dock_started_actions: EV_NOTIFY_ACTION_SEQUENCE -- Actions to be performed when pebble is picked up. -- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I) ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I 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_I) ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I not_void: Result /= Void file_drop_actions: EV_LITE_ACTION_SEQUENCE [LIST [STRING_32]] -- Actions to be performed when an OS file drop occurs on Current. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void focus_in_actions: EV_NOTIFY_ACTION_SEQUENCE -- Actions to be performed when keyboard focus is gained. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void focus_out_actions: EV_NOTIFY_ACTION_SEQUENCE -- Actions to be performed when keyboard focus is lost. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void key_press_actions: EV_KEY_ACTION_SEQUENCE -- Actions to be performed when a keyboard key is pressed. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void key_press_string_actions: EV_KEY_STRING_ACTION_SEQUENCE -- Actions to be performed when a keyboard press generates a displayable character. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void key_release_actions: EV_KEY_ACTION_SEQUENCE -- Actions to be performed when a keyboard key is released. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void mouse_wheel_actions: EV_INTEGER_ACTION_SEQUENCE -- Actions to be performed when mouse wheel is rotated. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I 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_I) ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I not_void: Result /= Void pick_ended_actions: EV_PND_FINISHED_ACTION_SEQUENCE -- Actions to be performed when a transport from Current ends. -- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I) ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I 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_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void pointer_button_release_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE -- Actions to be performed when screen pointer button is released. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I 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_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void pointer_enter_actions: EV_NOTIFY_ACTION_SEQUENCE -- Actions to be performed when screen pointer enters widget. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void pointer_leave_actions: EV_NOTIFY_ACTION_SEQUENCE -- Actions to be performed when screen pointer leaves widget. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE -- Actions to be performed when screen pointer moves. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= Void resize_actions: EV_GEOMETRY_ACTION_SEQUENCE -- Actions to be performed when size changes. -- (from EV_WIDGET_ACTION_SEQUENCES_I) ensure -- from EV_WIDGET_ACTION_SEQUENCES_I not_void: Result /= 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 -- Status Report has_capture: BOOLEAN -- Does widget have capture? has_focus: BOOLEAN -- Does widget have the keyboard focus? is_displayed: BOOLEAN -- Is Current visible on the screen? -- False if Current is entirely obscured by another window. is_show_requested: BOOLEAN -- Will Current be displayed when its parent is? -- See also is_displayed. invariant is_displayed_implies_show_requested: is_usable and is_displayed implies is_show_requested -- from EV_PICK_AND_DROPABLE_I 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 pebble_function_takes_two_integer_open_operands: attached pebble_function as l_pebble_function implies l_pebble_function.valid_operands ([1, 1]) -- from EV_ANY_I interface_coupled: is_usable implies interface /= Void and then attached_interface.implementation = Current base_make_called: is_usable implies base_make_called -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) -- from EV_POSITIONED_I minimum_width_positive_or_zero: is_usable implies minimum_width >= 0 minimum_height_positive_or_zero: is_usable implies minimum_height >= 0 -- from EV_DOCKABLE_SOURCE_I widget_or_item_source: not (widget_source_being_docked /= Void and item_source_being_docked /= Void) dock_executing: is_dock_executing implies widget_source_being_docked /= Void or item_source_being_docked /= Void 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_WIDGET_I
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