Class LineBasedScrollArea

Superclasses :

gui::DrawScrollArea

Subclasses :

gui::DisplayScrollArea
gui::EditableTextList
gui::SelectableScrollArea

Package :

gui

This is a scroll area where the objects to be displayed are lines of a fixed height.

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Class summary

Methods inherited from gui::DrawScrollArea

create_view() draw(subject_x, subject_y, vx, vy, vw, vh)

Methods inherited from gui::ScrollArea

compute_and_invalidate() create_view() display(buffer_flag) get_areax() get_areay() get_subject_width() get_view_x_padding() get_view_y_padding() initially() on_hsb() on_vsb() refresh(redraw) resize() set_internal_fields()

Variables inherited from gui::ScrollArea

hsb last_refresh_x last_refresh_y view vsb

Methods inherited from gui::Component

accepts_focus() add(c, i) all_components_valid() can_drag(ev) can_drop(d) child_validated(c) clear_accepts_focus() clear_allow_drag() clear_allow_drop() clear_draw_border() clear_is_shaded() compute_absolutes() create_event_and_fire(type, param) display(buffer_flag) do_handle_event(e) do_shading(W) drag_event(d) drag_reset() end_drag(d, c) fatal(s) finally() find_accel(e) find_focus() fire_icon_events_on_mouse(p, e) firstly() generate_components() get_accel() get_cbwin_reference() get_children() get_cwin_reference() get_h_reference() get_parent() get_parent_buffer_win() get_parent_dialog() get_parent_dialog_reference() get_parent_win() get_pointer() get_tooltip() get_w_reference() get_x_reference() get_y_reference() got_focus(e) handle_accel(e) handle_event(e) in_region(x1, y1) initially() invalidate() invoke_can_drag(ev) invoke_can_drop(d) invoke_drag_event(d) invoke_drag_reset() invoke_end_drag(d, c) is_attrib(s) is_dialog_open() is_hidden() is_shaded() is_ticking() is_unhidden() is_unshaded() keeps(e) lost_focus(e) parse_pos(total, s) remove(c) resize() retime_ticker(n) set_abs_coords(x, y) set_abs_size(w, h) set_accel(k) set_accepts_focus() set_align(x_align, y_align) set_allow_drag() set_allow_drop() set_attribs(x[]) set_attribs_list(l) set_draw_border() set_is_shaded() set_one(attr, val) set_parent(c) set_parent_dialog(c) set_pointer(x) set_pos(x_spec, y_spec) set_size(w_spec, h_spec) set_ticker(n, d) set_tooltip(x) stop_ticker() tick() toggle_draw_border() toggle_is_shaded() unique_end(x) unique_start() validate()

Variables inherited from gui::Component

accel accepts_focus_flag allow_drag_flag allow_drop_flag attribs cbwin children cwin draw_border_flag h h_spec has_focus is_shaded_flag parent parent_dialog pointer ticker tooltip valid w w_spec x x_align x_spec y y_align y_spec

Methods inherited from lang::Object

clone(seen) equals(other, seen) get_class() get_class_name() get_id() hash_code(depth, seen) is_instance(name) to_string(depth, seen)

Methods inherited from util::SetFields

as_attrib(attr, val) attrib(a[]) cset_val(attr, val) field_error(s) int_val(attr, val) int_vals(attr, val, n) numeric_val(attr, val) numeric_vals(attr, val, n) set_fields(l) set_one(attr, val) string_val(attr, val) string_vals(attr, val, n) test_flag(attr, val)

Methods inherited from util::Connectable

connect(obj, meth, type) disconnect(l) fire(type, param) fire_event(e) initially()

Variables inherited from util::Connectable

listeners

Methods defined in this class

ensure_row_visible(row) get_curr_lines() get_first_line() get_last_line() get_left_pos() get_line_count() get_line_height() get_line_under_pointer() get_max_lines() get_subject_height() get_subject_horizontal_increment() get_subject_vertical_increment() goto_pos(line, horiz) init()

Variables defined in this class

line_height

Method detail

ensure_row_visible(row)

Ensure the given row is visible

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Present number of lines on screen

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Get the number of the first visible line

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The index of the last line in the area, or zero if there are no lines.

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The virtual x position of a line in the canvas.

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This method is overridden by the subclass to return the number of lines.

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This method is overridden by the subclass to return the line height.

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Return the line under the current x, y cursor, or fail if not over a line.

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The maximum number of lines which can be displayed in the area

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Overrides get_subject_height() in gui::ScrollArea

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Overrides get_subject_horizontal_increment() in gui::ScrollArea

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Overrides get_subject_vertical_increment() in gui::ScrollArea

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Overrides init() in gui::Component

Private method, not intended for client invocation