Automatic generation produced by ISE Eiffel
note description: "Projectors for widgets using limited-sized buffer." legal: "See notice at end of class." status: "See notice at end of class." author: "Etienne Amodeo" date: "$Date: 2021-06-03 04:22:46 -0800 (Thu, 03 Jun 2021) $" revision: "$Revision: 105475 $" class interface EV_MODEL_BUFFER_PROJECTOR create make (a_world: like world; a_drawing_area: EV_DRAWING_AREA) -- Create with a_world and a_drawing_area. require a_world_not_void: a_world /= Void a_drawing_area_not_void: a_drawing_area /= Void make_with_buffer (a_world: like world; a_drawing_area: EV_DRAWING_AREA) -- Create with a_world and a_drawing_area. require a_world_not_void: a_world /= Void a_drawing_area_not_void: a_drawing_area /= Void feature -- Access arc_cosine (v: REAL_64): REAL_64 -- Trigonometric arccosine of radian v -- in the range [0, pi]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class arc_sine (v: REAL_64): REAL_64 -- Trigonometric arcsine of radian v -- in the range [-pi/2, +pi/2]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class arc_tangent (v: REAL_64): REAL_64 -- Trigonometric arctangent of radian v -- in the range [-pi/2, +pi/2]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class area: detachable EV_DRAWABLE -- Area associated with `widget`. -- Void if no buffer is used. -- (from EV_MODEL_WIDGET_PROJECTOR) area_x: INTEGER_32 -- Coordinates of top-left corner of displayed part of `drawable`. -- (0, 0) when no buffer is used. -- (from EV_MODEL_WIDGET_PROJECTOR) area_y: INTEGER_32 -- Coordinates of top-left corner of displayed part of `drawable`. -- (0, 0) when no buffer is used. -- (from EV_MODEL_WIDGET_PROJECTOR) Buffer_scale_factor: REAL_32 = 1.2 -- The buffer is `buffer_scale_factor` times bigger than the window. ceiling (v: REAL_64): REAL_64 -- Least integral greater than or equal to v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class cosine (v: REAL_64): REAL_64 -- Trigonometric cosine of radian v approximated -- in the range [-pi/4, +pi/4]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class dabs (v: REAL_64): REAL_64 -- Absolute of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class drawable: EV_DRAWABLE -- Drawable surface (screen, drawing area or pixmap). -- (from EV_MODEL_DRAWER) drawable_in_the_cell: EV_DRAWABLE -- Object on which the diagram should be drawn. -- (from EV_MODEL_BUFFER_MANAGER) drawable_cell: CELL [EV_DRAWABLE] -- Cell that contains `drawable`. -- (from EV_MODEL_BUFFER_MANAGER) drawable_position: EV_COORDINATE -- Position of `drawable` relative to `world`. -- (from EV_MODEL_BUFFER_MANAGER) Euler: REAL_64 = 2.7182818284590452353602874713526625 -- Logarithm base -- (from MATH_CONST) ev_application: EV_APPLICATION -- Current application if created yet. -- (from EV_SHARED_APPLICATION) require -- from EV_SHARED_APPLICATION application_exists: attached Shared_environment.application same_processor_as_application: Shared_environment.is_application_processor ev_separate_application: separate EV_APPLICATION -- Current application if created yet. -- (from EV_SHARED_APPLICATION) require -- from EV_SHARED_APPLICATION application_exists: attached Shared_environment.application exp (x: REAL_64): REAL_64 -- Exponential of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class floor (v: REAL_64): REAL_64 -- Greatest integral less than or equal to v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class generating_type: TYPE [detachable EV_MODEL_BUFFER_PROJECTOR] -- 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 is_world_too_large: BOOLEAN log (v: REAL_64): REAL_64 -- Natural logarithm of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class log10 (v: REAL_64): REAL_64 -- Base 10 logarithm of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class log_2 (v: REAL_64): REAL_64 -- Base 2 logarithm of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class offset_x: INTEGER_32 -- Everyting is drawn offset_x pixels to the right. offset_y: INTEGER_32 -- Everyting is drawen offset_y pixels to bottom. Pi: REAL_64 = 3.1415926535897932384626433832795029 -- (from MATH_CONST) Pi_2: REAL_64 = 1.5707963267948966192313216916397514 -- (from MATH_CONST) Pi_4: REAL_64 = 0.7853981633974483096156608458198757 -- (from MATH_CONST) Shared_environment: EV_ENVIRONMENT -- Shared EV_ENVIRONMENT object. -- (from EV_SHARED_APPLICATION) sine (v: REAL_64): REAL_64 -- Trigonometric sine of radian v approximated -- in range [-pi/4, +pi/4]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class sqrt (v: REAL_64): REAL_64 -- Square root of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class Sqrt2: REAL_64 = 1.4142135623730950488016887242096981 -- Square root of 2 -- (from MATH_CONST) tangent (v: REAL_64): REAL_64 -- Trigonometric tangent of radian v approximated -- in range [-pi/4, +pi/4]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class widget: EV_WIDGET -- device if conforms to EV_WIDGET. -- Void otherwise. -- (from EV_MODEL_WIDGET_PROJECTOR) world: EV_MODEL_WORLD -- Figure-world that will be projected. -- (from EV_MODEL_PROJECTOR) world_as_pixmap (a_border: INTEGER_32): EV_PIXMAP -- Image of the `world` with a_border. require a_border_positive: a_border >= 0 ensure result_not_void: Result /= Void 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 alias "≡≡≡" (other: EV_MODEL_BUFFER_PROJECTOR): 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_MODEL_BUFFER_PROJECTOR): 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 alias "≜" (other: EV_MODEL_BUFFER_PROJECTOR): 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 Buffer_used: BOOLEAN = True -- Is `drawable` only a buffer area for `area`? 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 is_figure_selected: BOOLEAN -- Was button pointer pressed on a figure? -- (from EV_MODEL_WIDGET_PROJECTOR) 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)) feature -- Status setting set_world (a_world: like world) -- Set `world` to a_world. -- (from EV_MODEL_PROJECTOR) require -- from EV_MODEL_PROJECTOR a_world_exists: a_world /= Void ensure -- from EV_MODEL_PROJECTOR world_assigned: world = a_world feature -- Element change change_area_position (a_x, a_y: INTEGER_32) -- `area` has moved to (a_x, a_y) of `drawable`. set_drawable_cell (a_drawable_cell: like drawable_cell) -- Set `drawable` to a_drawable. -- (from EV_MODEL_BUFFER_MANAGER) require -- from EV_MODEL_BUFFER_MANAGER a_drawable_cell_not_void: a_drawable_cell /= Void ensure -- from EV_MODEL_BUFFER_MANAGER assigned: drawable_cell = a_drawable_cell set_drawable_cell_and_position (a_drawable_cell: like drawable_cell; a_position: EV_COORDINATE) -- Set a_drawable to `drawable`. -- (from EV_MODEL_BUFFER_MANAGER) require -- from EV_MODEL_BUFFER_MANAGER a_drawable_not_void: a_drawable_cell /= Void a_position_not_void: a_position /= Void ensure -- from EV_MODEL_BUFFER_MANAGER assigned: drawable_cell = a_drawable_cell set_drawable_position (a_drawable_position: EV_COORDINATE) -- Set `drawable_position` to a_drawable_position. -- (from EV_MODEL_BUFFER_MANAGER) require -- from EV_MODEL_BUFFER_MANAGER a_drawable_position_not_void: a_drawable_position /= Void ensure -- from EV_MODEL_BUFFER_MANAGER drawable_position_assigned: drawable_position = a_drawable_position feature -- Duplication copy (other: EV_MODEL_BUFFER_PROJECTOR) -- 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_MODEL_BUFFER_PROJECTOR) -- 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_MODEL_BUFFER_PROJECTOR -- 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_MODEL_BUFFER_PROJECTOR) -- 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_MODEL_BUFFER_PROJECTOR -- 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_MODEL_BUFFER_PROJECTOR -- 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 clear_device -- Erase entire canvas. -- (from EV_MODEL_WIDGET_PROJECTOR) frozen default: detachable EV_MODEL_BUFFER_PROJECTOR -- 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 full_project -- Project entire area. -- (from EV_MODEL_WIDGET_PROJECTOR) is_projecting: BOOLEAN -- Is a project currently being performed? -- Then, do not start a new one. -- (from EV_MODEL_PROJECTION_ROUTINES) project -- Make a standard projection of world on device. -- (from EV_MODEL_WIDGET_PROJECTOR) feature -- Implementation between (n, a, b: INTEGER_32): BOOLEAN -- Is n a value between a and b? -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class Default_colors: EV_STOCK_COLORS -- Once access to EV_STOCK_COLORS. -- (from EV_MODEL_PROJECTION_ROUTINES) require -- from EV_MODEL_DRAWER True delta_x (angle: REAL_64; length: INTEGER_32): INTEGER_32 -- Get dx component of line segment with length and angle. -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class delta_y (angle: REAL_64; length: INTEGER_32): INTEGER_32 -- Get dy component of line segment with length and angle. -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class distance (x1, y1, x2, y2: INTEGER_32): INTEGER_32 -- Calculate distance between (x1, y1) and (x2, y2). -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class distance_from_line (x, y, x1, y1, x2, y2: INTEGER_32): INTEGER_32 -- Calculate distance between (x, y) and (x1, y1)-(x2, y2). -- The line is considered to be infinite. -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class line_angle (x1, y1, x2, y2: INTEGER_32): REAL_64 -- Return angle of line from (x1, y1) to (x2, y2) relative to world. -- clockwise. 0.0 is 3 o'clock. -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class modulo (a, b: REAL_64): REAL_64 -- a modulo b. -- (from EV_MODEL_MATH) require -- from EV_MODEL_MATH divisible: b /= 0.0 ensure -- from EV_MODEL_MATH instance_free: class in_interval: Result >= 0.0 and Result < b point_on_ellipse (x, y, xc, yc, r1, r2: INTEGER_32): BOOLEAN -- Is (x, y) inside specified ellipse? -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class point_on_ellipse_boundary (x, y, xc, yc, r1, r2, width: INTEGER_32): BOOLEAN -- Is (x, y) on specified ellipse border? -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class point_on_line (x, y, x1, y1, x2, y2, width: INTEGER_32): BOOLEAN -- Is (x, y) on line from (x2, y2) to (x1, y1) with width? -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class point_on_polygon (x, y: INTEGER_32; points: SPECIAL [EV_COORDINATE]): BOOLEAN -- Is (x, y) contained in polygon with points? -- Based on code by Hanpeter van Vliet. -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class point_on_rectangle (x, y, x1, y1, x2, y2: INTEGER_32): BOOLEAN -- Is (x, y) inside specified box? -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class point_on_segment (x, y, x1, y1, x2, y2, width: INTEGER_32): BOOLEAN -- Is (x, y) on segment [(x2, y2), (x1, y1)] with width? -- (from EV_MODEL_MATH) ensure -- from EV_MODEL_MATH instance_free: class feature -- Basic Operations draw_grid (a_world: EV_MODEL_WORLD) -- Draw grid on canvas. -- world.point is the origin of the grid. -- (from EV_MODEL_DRAWER) feature -- Display updates project_rectangle (u: EV_RECTANGLE) -- Project area under u update -- Update display by drawing the right part of the buffer on `area`. require -- from EV_MODEL_WIDGET_PROJECTOR buffer_used: Buffer_used update_rectangle (u: EV_RECTANGLE; a_x, a_y: INTEGER_32) -- Flush u on `area` at (a_x, a_y). require -- from EV_MODEL_WIDGET_PROJECTOR buffer_used: Buffer_used feature -- Element Change set_drawable (a_drawable: like drawable) -- Set `drawable` to a_drawable. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWER a_drawable_not_void: a_drawable /= Void ensure -- from EV_MODEL_DRAWER assigned: drawable = a_drawable feature -- Figure drawing draw_figure_arc (arc: EV_MODEL_ARC) -- Draw standard representation of arc to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES arc_not_void: arc /= Void draw_figure_dot (dot: EV_MODEL_DOT) -- Draw standard representation of dot to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES dot_not_void: dot /= Void draw_figure_ellipse (ellipse: EV_MODEL_ELLIPSE) -- Draw standard representation of ellipse to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES ellipse_not_void: ellipse /= Void draw_figure_equilateral (eql: EV_MODEL_EQUILATERAL) -- Draw standard representation of eql to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES eql_not_void: eql /= Void draw_figure_line (line: EV_MODEL_LINE) -- Draw standard representation of line to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES line_not_void: line /= Void draw_figure_parallelogram (parallelogram: EV_MODEL_PARALLELOGRAM) -- Draw standad representation of parallelogram to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES parallelogram_not_void: parallelogram /= Void draw_figure_picture (picture: EV_MODEL_PICTURE) -- Draw standard representation of picture to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES picture_not_void: picture /= Void draw_figure_pie_slice (slice: EV_MODEL_PIE_SLICE) -- Draw standard representation of slice to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES slice_not_void: slice /= Void draw_figure_polygon (polygon: EV_MODEL_POLYGON) -- Draw standard representation of polygon to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES polygon_not_void: polygon /= Void draw_figure_polyline (line: EV_MODEL_POLYLINE) -- Draw standard representation of polyline to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES line_not_void: line /= Void draw_figure_rectangle (rectangle: EV_MODEL_RECTANGLE) -- Draw standard representation of rectangle to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES rectangle_not_void: rectangle /= Void draw_figure_rotated_arc (arc: EV_MODEL_ROTATED_ARC) -- Draw standard representation of arc to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES arc_not_void: arc /= Void draw_figure_rotated_ellipse (ellipse: EV_MODEL_ROTATED_ELLIPSE) -- Draw standard representation of ellipse to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES ellipse_not_void: ellipse /= Void draw_figure_rotated_pie_slice (slice: EV_MODEL_ROTATED_PIE_SLICE) -- Draw standard representation of slice to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES slice_not_void: slice /= Void draw_figure_rounded_parallelogram (f: EV_MODEL_ROUNDED_PARALLELOGRAM) -- Draw standart representation of f to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES parallelogram_not_void: f /= Void draw_figure_rounded_rectangle (f: EV_MODEL_ROUNDED_RECTANGLE) -- Draw standard representation of f to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES f_not_void: f /= Void draw_figure_star (star: EV_MODEL_STAR) -- Draw standard representation of star to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES star_not_void: star /= Void draw_figure_text (text_figure: EV_MODEL_TEXT) -- Draw standard representation of text_figure to canvas. -- (from EV_MODEL_DRAWER) require -- from EV_MODEL_DRAWING_ROUTINES text_figure_not_void: text_figure /= 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 invariant right_drawable_in_the_cell: drawable = drawable_in_the_cell -- from EV_MODEL_PROJECTOR world_exists: world /= Void -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) -- from EV_MODEL_DRAWER drawable_not_void: drawable /= Void note copyright: "Copyright (c) 1984-2021, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., 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_MODEL_BUFFER_PROJECTOR -- Generated by Eiffel Studio --
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