Class: Tk::Entry
- Defined in:
- lib/ffi-tk/widget/entry.rb
Overview
An entry is a widget that displays a one-line text string and allows that string to be edited using widget methods described below, which are typically bound to keystrokes and mouse actions. When first created, an entry’s string is empty. A portion of the entry may be selected as described below. If an entry is exporting its selection (see the exportSelection option), then it will observe the standard X11 protocols for handling the selection; entry selections are available as type STRING. Entries also observe the standard Tk rules for dealing with the input focus. When an entry has the input focus it displays an insertion cursor to indicate where new characters will be inserted.
Entries are capable of displaying strings that are too long to fit entirely within the widget’s window. In this case, only a portion of the string will be displayed; methods described below may be used to change the view in the window. Entries use the standard xScrollCommand mechanism for interacting with scrollbars (see the description of the xScrollCommand option for details). They also support scanning, as described below.
Direct Known Subclasses
Constant Summary
Constants included from Cget
Constants included from WM
Instance Attribute Summary
Attributes inherited from Widget
Class Method Summary collapse
Instance Method Summary collapse
-
#bbox(index) ⇒ Object
Returns a list of four numbers describing the bounding box of the character given by index.
- #clear ⇒ Object
- #cursor ⇒ Object
- #cursor=(index) ⇒ Object
-
#delete(first, last = None) ⇒ Object
Delete one or more elements of the entry.
-
#get ⇒ Object
Returns the entry’s string.
-
#icursor(index) ⇒ Object
Arrange for the insertion cursor to be displayed just before the character given by index.
-
#index(index) ⇒ Object
Returns the numerical index corresponding to index.
-
#insert(index, string) ⇒ Object
Insert the characters of string just before the character indicated by index.
-
#scan_dragto(x) ⇒ Object
This command computes the difference between its x argument and the x argument to the last scan mark command for the widget.
-
#scan_mark(x) ⇒ Object
Records x and the current view in the entry window; used in conjunction with later scan dragto commands.
-
#selection_adjust(index) ⇒ Object
Locate the end of the selection nearest to the character given by index, and adjust that end of the selection to be at index (i.e. including but not going beyond index).
-
#selection_clear ⇒ Object
Clear the selection if it is currently in this widget.
-
#selection_from(index) ⇒ Object
Set the selection anchor point to just before the character given by index.
-
#selection_present ⇒ Object
Returns true if there is are characters selected in the entry, false if nothing is selected.
-
#selection_range(from, to) ⇒ Object
Sets the selection to include the characters starting with the one indexed by start and ending with the one just before end.
-
#selection_to(index) ⇒ Object
If index is before the anchor point, set the selection to the characters from index up to but not including the anchor point.
-
#validate ⇒ Object
This command is used to force an evaluation of the validateCommand independent of the conditions specified by the validate option.
- #value ⇒ Object
- #value=(string) ⇒ Object
-
#xview(index = None) ⇒ Object
Adjusts the view in the window so that the character given by index is displayed at the left edge of the window.
-
#xview_moveto(fraction) ⇒ Object
Adjusts the view in the window so that the character fraction of the way through the text appears at the left edge of the window.
-
#xview_scroll(number, what) ⇒ Object
This command shifts the view in the window left or right according to number and what.
Methods included from Cget
#cget, option_hash_to_tcl, option_to_ruby, type_to_ruby
Methods included from Configure
Methods inherited from Widget
#execute, #execute_only, #focus, #focus_next, #focus_prev, #initialize, #lower, #raise, #to_tcl
Methods included from Pack
configure, forget, info, pack, #pack, #pack_configure, #pack_forget, #pack_info, #pack_propagate, #pack_slaves, propagate, slaves
Methods included from Destroy
Methods included from Bind
Methods included from Bindtags
Methods included from WM
aspect, attributes, client, colormapwindows, command, deiconify, focusmodel, forget, frame, geometry, grid, group, iconbitmap, iconbitmap_default, iconify, iconmask, iconname, iconphoto, iconphoto_default, iconposition, iconwindow, manage, maxsize, minsize, overrideredirect, positionfrom, protocol, resizable, sizefrom, stackorder, state, title, transient, withdraw, #wm_aspect, #wm_aspect=, #wm_attributes, #wm_client, #wm_client=, #wm_colormapwindows, #wm_colormapwindows=, #wm_command, #wm_command=, #wm_deiconify, #wm_focusmodel, #wm_focusmodel=, #wm_forget, #wm_frame, #wm_geometry, #wm_geometry=, #wm_grid, #wm_grid=, #wm_group, #wm_group=, #wm_iconbitmap, #wm_iconbitmap=, #wm_iconbitmap_default, #wm_iconbitmap_default=, #wm_iconify, #wm_iconmask, #wm_iconmask=, #wm_iconname, #wm_iconname=, #wm_iconphoto, #wm_iconphoto=, #wm_iconphoto_default, #wm_iconphoto_default=, #wm_iconposition, #wm_iconposition=, #wm_iconwindow, #wm_iconwindow=, #wm_manage, #wm_maxsize, #wm_minsize, #wm_overrideredirect, #wm_overrideredirect=, #wm_positionfrom, #wm_positionfrom=, #wm_protocol, #wm_resizable, #wm_sizefrom, #wm_sizefrom=, #wm_stackorder, #wm_state, #wm_state=, #wm_title, #wm_title=, #wm_transient, #wm_transient=, #wm_withdraw
Methods included from Winfo
atom, atomname, cells, children, class_name, colormapfull, containing, depth, exists, fpixels, geometry, height, id, interps, ismapped, manager, name, parent, pathname, pixels, pointerx, pointerxy, pointery, reqheight, reqwidth, rgb, rootx, rooty, screen, screencells, screendepth, screenheight, screenmmheight, screenmmwidth, screenvisual, screenwidth, server, toplevel, viewable, visual, visualid, visualsavailable, vrootheight, vrootwidth, vrootx, vrooty, width, #winfo_atom, #winfo_atomname, #winfo_cells, #winfo_children, #winfo_class, #winfo_colormapfull, #winfo_containing, #winfo_depth, #winfo_exists, #winfo_fpixels, #winfo_geometry, #winfo_height, #winfo_id, #winfo_interps, #winfo_ismapped, #winfo_manager, #winfo_name, #winfo_parent, #winfo_pathname, #winfo_pixels, #winfo_pointerx, #winfo_pointerxy, #winfo_pointery, #winfo_reqheight, #winfo_reqwidth, #winfo_rgb, #winfo_rootx, #winfo_rooty, #winfo_screen, #winfo_screencells, #winfo_screendepth, #winfo_screenheight, #winfo_screenmmheight, #winfo_screenmmwidth, #winfo_screenvisual, #winfo_screenwidth, #winfo_server, #winfo_toplevel, #winfo_viewable, #winfo_visual, #winfo_visualid, #winfo_visualsavailable, #winfo_vrootheight, #winfo_vrootwidth, #winfo_vrootx, #winfo_vrooty, #winfo_width, #winfo_x, #winfo_y, x, y
Methods included from Grid
anchor, bbox, columnconfigure, configure, forget, #grid_anchor, #grid_bbox, #grid_columnconfigure, #grid_configure, #grid_forget, #grid_info, #grid_location, #grid_propagate, #grid_remove, #grid_rowconfigure, #grid_size, #grid_slave, #grid_slaves, info, location, propagate, remove, rowconfigure, size, slave, slaves
Methods included from Clipboard
append, clear, #clipboard_append, #clipboard_clear, #clipboard_get, #clipboard_set, get, set
Methods included from Place
configure, forget, info, place, #place, #place_configure, #place_forget, #place_info, #place_slaves, slaves
Methods included from TkCmd
appname, caret, inactive, scaling, #tk_appname, #tk_appname=, #tk_caret, #tk_inactive, #tk_scaling, #tk_scaling=, #tk_useinputmethods, #tk_useinputmethods=, #tk_windowingsystem, useinputmethods, windowingsystem
Constructor Details
This class inherits a constructor from Tk::Widget
Class Method Details
.tk_command ⇒ Object
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# File 'lib/ffi-tk/widget/entry.rb', line 24 def self.tk_command; 'entry'; end |
Instance Method Details
#bbox(index) ⇒ Object
Returns a list of four numbers describing the bounding box of the character given by index. The first two elements of the list give the x and y coordinates of the upper-left corner of the screen area covered by the character (in pixels relative to the widget) and the last two elements give the width and height of the character, in pixels. The bounding box may refer to a region outside the visible area of the window.
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# File 'lib/ffi-tk/widget/entry.rb', line 55 def bbox(index) execute(:bbox, index).to_a(&:to_i) end |
#clear ⇒ Object
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# File 'lib/ffi-tk/widget/entry.rb', line 35 def clear delete 0, :end end |
#cursor ⇒ Object
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# File 'lib/ffi-tk/widget/entry.rb', line 39 def cursor index(:insert) end |
#cursor=(index) ⇒ Object
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# File 'lib/ffi-tk/widget/entry.rb', line 43 def cursor=(index) icursor(index) end |
#delete(first, last = None) ⇒ Object
Delete one or more elements of the entry. First is the index of the first character to delete, and last is the index of the character just after the last one to delete. If last is not specified it defaults to first+1, i.e. a single character is deleted.
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# File 'lib/ffi-tk/widget/entry.rb', line 64 def delete(first, last = None) execute(:delete, first, last) end |
#get ⇒ Object
Returns the entry’s string.
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# File 'lib/ffi-tk/widget/entry.rb', line 69 def get execute(:get).to_s end |
#icursor(index) ⇒ Object
Arrange for the insertion cursor to be displayed just before the character given by index.
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# File 'lib/ffi-tk/widget/entry.rb', line 75 def icursor(index) execute_only(:icursor, index) end |
#index(index) ⇒ Object
Returns the numerical index corresponding to index.
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# File 'lib/ffi-tk/widget/entry.rb', line 80 def index(index) execute(:index, index) end |
#insert(index, string) ⇒ Object
Insert the characters of string just before the character indicated by index.
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# File 'lib/ffi-tk/widget/entry.rb', line 86 def insert(index, string) execute_only(:insert, index, string) end |
#scan_dragto(x) ⇒ Object
This command computes the difference between its x argument and the x argument to the last scan mark command for the widget. It then adjusts the view left or right by 10 times the difference in x-coordinates. This command is typically associated with mouse motion events in the widget, to produce the effect of dragging the entry at high speed through the window.
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# File 'lib/ffi-tk/widget/entry.rb', line 105 def scan_dragto(x) execute_only(:scan, :dragto, x) end |
#scan_mark(x) ⇒ Object
Records x and the current view in the entry window; used in conjunction with later scan dragto commands. Typically this command is associated with a mouse button press in the widget.
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# File 'lib/ffi-tk/widget/entry.rb', line 94 def scan_mark(x) execute_only(:scan, :mark, x) end |
#selection_adjust(index) ⇒ Object
Locate the end of the selection nearest to the character given by index, and adjust that end of the selection to be at index (i.e. including but not going beyond index). The other end of the selection is made the anchor point for future select to commands. If the selection is not currently in the entry, then a new selection is created to include the characters between index and the most recent selection anchor point, inclusive.
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# File 'lib/ffi-tk/widget/entry.rb', line 117 def selection_adjust(index) execute_only(:selection, :adjust, index) end |
#selection_clear ⇒ Object
Clear the selection if it is currently in this widget. If the selection is not in this widget then the command has no effect.
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# File 'lib/ffi-tk/widget/entry.rb', line 123 def selection_clear execute_only(:selection, :clear) end |
#selection_from(index) ⇒ Object
Set the selection anchor point to just before the character given by index. Does not change the selection.
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# File 'lib/ffi-tk/widget/entry.rb', line 130 def selection_from(index) execute_only(:selection, :from, index) end |
#selection_present ⇒ Object
Returns true if there is are characters selected in the entry, false if nothing is selected.
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# File 'lib/ffi-tk/widget/entry.rb', line 136 def selection_present execute(:selection, :present) == 1 end |
#selection_range(from, to) ⇒ Object
Sets the selection to include the characters starting with the one indexed by start and ending with the one just before end. If end refers to the same character as start or an earlier one, then the entry’s selection is cleared.
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# File 'lib/ffi-tk/widget/entry.rb', line 144 def selection_range(from, to) execute_only(:selection, :range, from, to) end |
#selection_to(index) ⇒ Object
If index is before the anchor point, set the selection to the characters from index up to but not including the anchor point. If index is the same as the anchor point, do nothing. If index is after the anchor point, set the selection to the characters from the anchor point up to but not including index. The anchor point is determined by the most recent select from or select adjust command in this widget. If the selection is not in this widget then a new selection is created using the most recent anchor point specified for the widget.
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# File 'lib/ffi-tk/widget/entry.rb', line 157 def selection_to(index) execute_only(:selection, :to, index) end |
#validate ⇒ Object
This command is used to force an evaluation of the validateCommand independent of the conditions specified by the validate option. This is done by temporarily setting the validate option to all. It returns true or false.
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# File 'lib/ffi-tk/widget/entry.rb', line 165 def validate execute(:validate) == 1 end |
#value ⇒ Object
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# File 'lib/ffi-tk/widget/entry.rb', line 26 def value get end |
#value=(string) ⇒ Object
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# File 'lib/ffi-tk/widget/entry.rb', line 30 def value=(string) delete 0, :end insert 0, string end |
#xview(index = None) ⇒ Object
Adjusts the view in the window so that the character given by index is displayed at the left edge of the window.
If no index is given, it returns a list containing two elements. Each element is a real fraction between 0 and 1; together they describe the horizontal span that is visible in the window. For example, if the first element is 0.2 and the second element is 0.6, 20% of the entry’s text is off-screen to the left, the middle 40% is visible in the window, and 40% of the text is off-screen to the right. These are the same values passed to scrollbars via the :xscrollcommand option.
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# File 'lib/ffi-tk/widget/entry.rb', line 180 def xview(index = None) if index == None execute(:xview) else execute_only(:xview, index) end end |
#xview_moveto(fraction) ⇒ Object
Adjusts the view in the window so that the character fraction of the way through the text appears at the left edge of the window. Fraction must be a fraction between 0 and 1.
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# File 'lib/ffi-tk/widget/entry.rb', line 191 def xview_moveto(fraction) execute_only(:xview, :moveto, fraction) end |
#xview_scroll(number, what) ⇒ Object
This command shifts the view in the window left or right according to number and what. Number must be an integer. What must be either units or pages or an abbreviation of one of these. If what is units, the view adjusts left or right by number average-width characters on the display; if it is pages then the view adjusts by number screenfuls. If number is negative then characters farther to the left become visible; if it is positive then characters farther to the right become visible.
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# File 'lib/ffi-tk/widget/entry.rb', line 204 def xview_scroll(number, what) execute_only(:xview, :scroll, number, what) end |