GtkAda Reference Manual - Package Gtk.Extra.Sheet

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# Package Gtk.Extra.Sheet

A Gtk_Sheet is a table like the one you can find in most spreadsheets. Each cell can contain some text or any kind of widgets.

- Gtk.Extra.Sheet Widget Hierarchy
- Gtk.Extra.Sheet Signals
- Gtk.Extra.Sheet Types
- Gtk.Extra.Sheet Subprograms

## Widget Hierarchy

    GObject                       (see section Package Glib.Object)
    Gtk_Object                    (see section Package Gtk.Object)
       \___ Gtk_Widget            (see section Package Gtk.Widget)
          \___ Gtk_Container      (see section Package Gtk.Container)
             \___ Gtk_Sheet       (see section Package Gtk.Extra.Sheet)

## Signals

- "activate" function Handler (Sheet : access Gtk_Sheet_Record'Class;
  Row : Gint;
  Column : Gint)
  return Boolean;
  Emitted when the user wants to activate a specific cell. The callback should return True if the cell can be activated, False otherwise. See the subprogram Activate_Cell.
- "changed" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Row : Gint;
  Column : Gint);
  Emitted when the content of the cell is modified (either the text itself, or its properties, alignment,...) A value of -1 for Row or Column means the row title, the column title, or their intersection.
- "clear_cell" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Row : Gint;
  Column : Gint);
  Emitted when the content of the cell has been deleted (the text is now the empty string).
- "clip_range" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Clip_Range : Gtk_Sheet_Range);
  Emitted when the clip area is set to a new value.
- "deactivate" function Handler (Sheet : access Gtk_Sheet_Record'Class;
  Row : Gint;
  Column : Gint)
  return Boolean;
  Emitted when the user wants to deactivate a specific cell. The callback should return True if the cell can be deactivated, False otherwise. See the subprogram Deactivate_Cell.
- "move_range" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Old_Range : Gtk_Sheet_Range;
  New_Range : Gtk_Sheet_Range);
  Emitted when the current range of selected cell is moved (ie the top-left cell is changed, but the size is not modified).
- "new_column_width" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Column : Gint;
  Width : Guint);
  Emitted whenever the width of the column is changed, either by the user or automatically if the cells should automatically resize themselves depending on their contents).
- "new_row_height" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Row : Gint;
  Height : Guint);
  Emitted whenever the height of the row is changed.
- "resize_range" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Old_Range : Gtk_Sheet_Range;
  New_Range : Gtk_Sheet_Range);
  Emitted when the current range of selected cell is resized (ie new cells are added to it or removed from it).
- "select_column" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Column : Gint);
  Emitted when a new column is selected.
- "select_range" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  The_Range : Gtk_Sheet_Range);
  Emitted when a new range of cells is selected.
- "select_row" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Row : Gint);
  Emitted when a new row is selected.
- "set_cell" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Row : Gint;
  Column : Gint);
  Emitted from Hide_Active_Cell, when the cell is non-empty. ???
- "set_scroll_adjustments" procedure Handler (Sheet : access Gtk_Sheet_Record'Class;
  Hadj : Gtk_Adjustement;
  Vadj : Gtk_Adjustment);
  Emitted when the adjustments used to indicate which area of the sheet is visible are set or changed. This is not called when their value is changed, only when a new one is set.
- "traverse" function Handler (Sheet : access Gtk_Sheet_Record'Class;
  Row : Gint;
  Column : Gint;
  New_Row : Gint_Access;
  New_Column : Gint_Access)
  return Boolean;
  Emitted when the user wants to make a new cell active. The coordinates of the currently active cell are passed in (Row, Column), the coordinates of the cell that the user would like to select are passed in (New_Row, New_Column). The callback can modify the new values, and should return True if the new coordinates are accepted, False if the selection should be refused.

## Types

    type Gtk_Sheet_Border is new Integer;
| Mask that indicates which borders should be visible in a cell.
    type Gtk_Sheet_Child is new Gdk.C_Proxy;
| A widget insert in the sheet. This structure includes both a widget pointer and the position in the table in which it is put.
    type Sheet_State is
        (Sheet_Normal,
         Sheet_Row_Selected,
         Sheet_Column_Selected,
         Sheet_Range_Selected);
| The state of the selection. pragma Convention (C, Sheet_State);

## Subprograms

### Creation and modification
    procedure Gtk_New
      (Sheet              : out    Gtk_Sheet;
       Rows               : in     Guint;
       Columns            : in     Guint;
       Title              : in     UTF8_String := "";
       Entry_Type         : in     Gtk_Type := GType_Invalid);
| Create a new sheet with a specific number of rows and columns. You can fully specify which type the entry used to modify the value of cells should have. The value of Entry_Type can be found by using one of the Get_Type subprograms in the GtkAda packages. The Title is internal, and does not appear on the screen.
    procedure Gtk_New_Browser
      (Sheet              : out    Gtk_Sheet;
       Rows               : in     Guint;
       Columns            : in     Guint;
       Title              : in     UTF8_String := "");
| Create a new sheet browser with a specific number of rows and columns. This is a standard Gtk_Sheet, except that it is read-only and that its cells will automatically resize themselves depending on their contents.
    procedure Initialize_Browser
      (Sheet              : access Gtk_Sheet_Record'Class;
       Rows               : in     Guint;
       Columns            : in     Guint;
       Title              : in     UTF8_String := "");
| Internal initialization function. See the section "Creating your own widgets" in the documentation.
    function Get_Type              return Gtk.Gtk_Type;
| Return the internal value associated with a Gtk_Sheet.
    procedure Set_Hadjustment
      (Sheet              : access Gtk_Sheet_Record;
       Adjustment         : access Gtk_Adjustment_Record'Class);
| Change the horizontal adjustment. It indicates what range of columns is visible.
    procedure Set_Vadjustment
      (Sheet              : access Gtk_Sheet_Record;
       Adjustment         : access Gtk_Adjustment_Record'Class);
| Change the vertical adjustment. It indicates what range of rows is visible.
    function Get_Vadjustment
      (Sheet              : access Gtk_Sheet_Record)
       return Gtk.Adjustment.Gtk_Adjustment;
| Return the adjustment used to indicate the range of visible rows.
    function Get_Hadjustment
      (Sheet              : access Gtk_Sheet_Record)
       return Gtk.Adjustment.Gtk_Adjustment;
| Return the adjustment used to indicate the range of visible columns.
    procedure Change_Entry
      (Sheet              : access Gtk_Sheet_Record;
       Entry_Type         : in     Gtk_Type);
| Change the type of widget used to interactively modify the value of the cells.
    function Get_Entry
      (Sheet              : access Gtk_Sheet_Record)
       return Gtk.Widget.Gtk_Widget;
| Return the entry used to modify the content of the cells.
    procedure Set_Title
      (Sheet              : access Gtk_Sheet_Record;
       Title              : in     UTF8_String);
| Change the title of the sheet.
    procedure Freeze
      (Sheet              : access Gtk_Sheet_Record);
| Freeze all visual updates of the sheet, until you thaw it. The update will occur in a more efficient way.
    procedure Thaw
      (Sheet              : access Gtk_Sheet_Record);
| Thaw the sheet, so that visual updates occur again. Note that you have to call Thaw as many times as you have called Freeze to actually thaw the widget.
    procedure Moveto
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Column             : in     Gint;
       Row_Align          : in     Gfloat;
       Col_Align          : in     Gfloat);
| Scroll the viewing area to (Row, Column). (Row_Align, Col_Align) represent the location on the screen that the cell should appear at. (0.0, 0.0) is at the top-left of the screen, whereas (1.0, 1.0) is at the bottom-right corner. If Row or Column is negative, there is no change.
    procedure Set_Background
      (Sheet              : access Gtk_Sheet_Record;
       Color              :        Gdk.Color.Gdk_Color);
| Change the background color of the cells.
    procedure Set_Grid
      (Sheet              : access Gtk_Sheet_Record;
       Color              :        Gdk.Color.Gdk_Color);
| Set the color to use for the grid.
    procedure Show_Grid
      (Sheet              : access Gtk_Sheet_Record;
       Show               :        Boolean);
| Whether the grid should be made visible
    function Grid_Visible
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether the grid is currently visible
### Selection and Clipping
    function Get_State
      (Sheet              : access Gtk_Sheet_Record)
       return Sheet_State;
| Return the status of the selection in the sheet.
    function Get_Range
      (Sheet              : access Gtk_Sheet_Record)
       return Gtk_Sheet_Range;
| Return the selected range.
    procedure Get_Visible_Range
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : out    Gtk_Sheet_Range);
| Return the range visible on the screen.
    procedure Set_Selection_Mode
      (Sheet              : access Gtk_Sheet_Record;
       Mode               : in     Gtk.Enums.Gtk_Selection_Mode);
| Change the selection mode.
    procedure Select_Column
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint);
| Replace the current selection with a specific column. The range is highlighted.
    procedure Select_Row
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint);
| Replace the current selection with a specific row. The range is highlighted.
    procedure Set_Autoresize
      (Sheet              : access Gtk_Sheet_Record;
       Autoresize         :        Boolean);
| Whether cells should automatically resize to fit their contents
    function Autoresize
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether cells automatically resize to fit their contents
    procedure Set_Autoscroll
      (Sheet              : access Gtk_Sheet_Record;
       Autoscroll         :        Boolean);
| Whether the sheet should automatically scroll to show the active cell at all times.
    function Autoscroll
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether the sheet automatically scrolls to show the active cell at all times.
    procedure Set_Clip_Text
      (Sheet              : access Gtk_Sheet_Record;
       Clip               :        Boolean);
| Set when the text contained in the cells is automatically clipped to their width.
    function Clip_Text
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether the text contained in the cells is automatically clipped to their width.
    procedure Set_Justify_Entry
      (Sheet              : access Gtk_Sheet_Record;
       Justify_Entry      :        Boolean);
| Set when the justification attribute for entries should be taken into account
    function Justify_Entry
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether the justification attribute is used for entries
    procedure Set_Locked
      (Sheet              : access Gtk_Sheet_Record;
       Locked             :        Boolean);
| If Locked is true, the cells are no longer editable
    function Locked
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether cells are currently read-only
    procedure Select_Range
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range);
| Select a new range of cells.
    procedure Unselect_Range
      (Sheet              : access Gtk_Sheet_Record);
| Unselect a specific range of cells. If null is passed, the current selected range is used.
    procedure Clip_Range
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range);
| Create a new clip range, which is copied to the clipboard That range is flashed on the screen.
    procedure Unclip_Range
      (Sheet              : access Gtk_Sheet_Record);
| Destroy the clip area.
    function In_Clip
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether a range was copied to the clipboard
    function Set_Active_Cell
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Column             : in     Gint)
       return Boolean;
| Set active cell where the entry will be displayed. Returns FALSE if the current cell can not be deactivated or if the requested cell can't be activated. Depending on the value passed to Set_Autoscroll, the sheet might be scrolled.
    procedure Get_Active_Cell
      (Sheet              : access Gtk_Sheet_Record;
       Row                : out    Gint;
       Column             : out    Gint);
| Return the coordinates of the active cell. This is the cell that the user is currently editing.
### Columns
    procedure Set_Column_Title
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint;
       Title              : in     UTF8_String);
| Modify the title of a column. The first column on the left has the number 0. Note that this title does not appear on the screen, and can only be used internally to find a specific column.
    function Get_Column_Title
      (Sheet              : access Gtk_Sheet_Record;
       Column             :        Gint)
       return UTF8_String;
| Return the title of a specific column.
    procedure Set_Column_Titles_Height
      (Sheet              : access Gtk_Sheet_Record;
       Height             :        Guint);
| Modify the height of the row in which the column titles appear.
    procedure Column_Button_Add_Label
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint;
       Label              : in     UTF8_String);
| Modify the label of the button that appears at the top of each column.
    function Column_Button_Get_Label
      (Sheet              : access Gtk_Sheet_Record;
       Column             :        Gint)
       return UTF8_String;
| Return the label for the button that appears at the top of each column
    procedure Column_Button_Justify
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint;
       Justification      : in     Gtk.Enums.Gtk_Justification);
| Modify the justification for the label in the column button.
    procedure Show_Column_Titles
      (Sheet              : access Gtk_Sheet_Record);
| Show the row in which the column titles appear.
    procedure Hide_Column_Titles
      (Sheet              : access Gtk_Sheet_Record);
| Hide the row in which the column titles appear.
    function Column_Titles_Visible
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether a special row is added at the top to show the title of the columns.
    procedure Columns_Set_Sensitivity
      (Sheet              : access Gtk_Sheet_Record;
       Sensitive          : in     Boolean);
| Modify the sensitivity of all the columns. If Sensitive is False, the columns can not be resized dynamically. This also modifies the sensitivity of the button at the top of the columns.
    procedure Column_Set_Sensitivity
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint;
       Sensitive          : in     Boolean);
| Modify the sensitivity of a specific column and its title button. If Sensitive if False, the column can not be dynamically resized.
    procedure Column_Set_Visibility
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint;
       Visible            : in     Boolean);
| Change the visibility of a column.
    procedure Columns_Set_Resizable
      (Sheet              : access Gtk_Sheet_Record;
       Resizable          :        Boolean);
| Whether columns are resizable
    function Columns_Resizable
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether columns are resizable
    procedure Column_Label_Set_Visibility
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint;
       Visible            : in     Boolean := True);
| Change the visibility of the label in a given column.
    procedure Columns_Labels_Set_Visibility
      (Sheet              : access Gtk_Sheet_Record;
       Visible            :        Boolean := True);
| Change the visibility for all the column labels.
    procedure Set_Column_Width
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint;
       Width              : in     Guint);
| Modify the width in pixels of a specific column.
    function Get_Column_Width
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint)
       return Gint;
| Return the width in pixels of the Column-nth in Sheet.
    procedure Add_Column
      (Sheet              : access Gtk_Sheet_Record;
       Ncols              : in     Guint);
| Add some empty columns at the end of the sheet.
    procedure Insert_Columns
      (Sheet              : access Gtk_Sheet_Record;
       Col                : in     Guint;
       Ncols              : in     Guint);
| Add Ncols empty columns just before the columns number Col.
    procedure Delete_Columns
      (Sheet              : access Gtk_Sheet_Record;
       Col                : in     Guint;
       Ncols              : in     Guint);
| Delete Ncols columns starting from Col.
    procedure Column_Set_Justification
      (Sheet              : access Gtk_Sheet_Record;
       Column             : in     Gint;
       Justification      : in     Gtk.Enums.Gtk_Justification);
| Set the default justification for the cells in the specific column.
    function Get_Columns_Count
      (Sheet              : access Gtk_Sheet_Record)
       return Guint;
| Return the maximum column number of the displayed cells.
### Rows
    procedure Set_Row_Title
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Title              : in     UTF8_String);
| Modify the title of a row. The first row at the top has the number 0. Note that this title does not appear on the screen, and can only be used internally to find a specific row.
    function Get_Row_Title
      (Sheet              : access Gtk_Sheet_Record;
       Row                :        Gint)
       return UTF8_String;
| Return the title of a specific row.
    procedure Set_Row_Titles_Width
      (Sheet              : access Gtk_Sheet_Record;
       Width              :        Guint);
| Modify the width of the column that has the row titles.
    procedure Row_Button_Add_Label
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Label              : in     UTF8_String);
| Modify the label of the button that appears on the left of each row.
    function Row_Button_Get_Label
      (Sheet              : access Gtk_Sheet_Record;
       Row                :        Gint)
       return UTF8_String;
| Return the label for the button that appears on the left of each row.
    procedure Row_Button_Justify
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Justification      : in     Gtk.Enums.Gtk_Justification);
| Modify the justification for the label of the row button.
    procedure Show_Row_Titles
      (Sheet              : access Gtk_Sheet_Record);
| Show the column in which the row titles appear.
    procedure Hide_Row_Titles
      (Sheet              : access Gtk_Sheet_Record);
| Hide the column in which the row titles appear.
    function Row_Titles_Visible
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether a special column is added to the left to show the title of the rows.
    procedure Rows_Set_Sensitivity
      (Sheet              : access Gtk_Sheet_Record;
       Sensitive          : in     Boolean);
| Modify the sensitivity of all the rows. If Sensitive is False, the rows can not be resized dynamically. This also modifies the sensitivity of the button at the left of the row.
    procedure Row_Set_Sensitivity
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Sensitive          : in     Boolean);
| Modify the sensitivity of a specific row and its title button. If Sensitive if False, the row can not be dynamically resized.
    procedure Row_Set_Visibility
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Visible            : in     Boolean);
| Modify the visibility of a specific row
    procedure Row_Label_Set_Visibility
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Visible            : in     Boolean := True);
| Change the visibility of the label in a given Row.
    procedure Rows_Labels_Set_Visibility
      (Sheet              : access Gtk_Sheet_Record;
       Visible            :        Boolean := True);
| Change the visibility for all the row labels.
    procedure Rows_Set_Resizable
      (Sheet              : access Gtk_Sheet_Record;
       Resizable          :        Boolean);
| Whether rows are resizable
    function Rows_Resizable
      (Sheet              : access Gtk_Sheet_Record)
       return Boolean;
| Whether rows are resizable
    procedure Set_Row_Height
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Height             : in     Guint);
| Set the height in pixels of a specific row.
    function Get_Row_Height
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint)
       return Gint;
| Return the height in pixels of the Row-th row in Sheet.
    procedure Add_Row
      (Sheet              : access Gtk_Sheet_Record;
       Nrows              : in     Guint);
| Append Nrows row at the end of the sheet.
    procedure Insert_Rows
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Guint;
       Nrows              : in     Guint);
| Add Nrows empty rows just before the row number Row.
    procedure Delete_Rows
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Guint;
       Nrows              : in     Guint);
| Delete Nrows rows starting from Row.
    function Get_Rows_Count
      (Sheet              : access Gtk_Sheet_Record)
       return Guint;
| Return the maximum row number of displayed cells.
### Range
    function Range_Get_Type        return Gtk.Gtk_Type;
| Return the internal value associate with a Gtk_Sheet_Range
    procedure Range_Clear
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range);
| Clear the content of the range.
    procedure Range_Delete
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range);
| Clear the content of the range and delete all the links (user_data)
    procedure Range_Set_Background
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range;
       Color              : in     Gdk.Color.Gdk_Color);
| Set the background color for the cells in a specific range.
    procedure Range_Set_Foreground
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range;
       Color              : in     Gdk.Color.Gdk_Color);
| Set the foreground color for the cells in a specific range.
    procedure Range_Set_Justification
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range;
       Justification      : in     Gtk.Enums.Gtk_Justification);
| Set the text justification for the cells in the range.
    procedure Range_Set_Editable
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range;
       Editable           : in     Boolean);
| Set whether the cells in the range are editable.
    procedure Range_Set_Visible
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range;
       Visible            : in     Boolean);
| Set whether the cells in the range are visible.
    procedure Range_Set_Border
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range;
       Mask               : in     Gtk_Sheet_Border;
       Width              : in     Guint;
       Line_Style         : in     Gdk.GC.Gdk_Line_Style);
| Set the style of the border for the cells in the range.
    procedure Range_Set_Border_Color
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range;
       Color              : in     Gdk.Color.Gdk_Color);
| Change the color for the borders of the cells in the range.
    procedure Range_Set_Font
      (Sheet              : access Gtk_Sheet_Record;
       The_Range          : in     Gtk_Sheet_Range;
       Font               :        Pango.Font.Pango_Font_Description);
| Change the font of the cells in the range.
### Cells
    procedure Set_Cell
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint;
       Justification      : in     Gtk.Enums.Gtk_Justification;
       Text               : in     UTF8_String);
| Set the cell contents. Set Text to the empty string to delete the content of the cell.
    procedure Set_Cell_Text
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint;
       Text               : in     UTF8_String);
| Set the cell contents. The justification used is the previous one used in that cell.
    function Cell_Get_Text
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint)
       return UTF8_String;
| Return the text put in a specific cell. The empty string is returned if there is no text in that cell.
    procedure Cell_Clear
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint);
| Clear the contents of the cell.
    procedure Cell_Delete
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint);
| Clear the contents of the cell and remove the user data associated with it.
    function Cell_Get_State
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint)
       return Gtk.Enums.Gtk_State_Type;
| Return the state of the cell (normal or selected).
    procedure Get_Pixel_Info
      (Sheet              : access Gtk_Sheet_Record;
       X                  : in     Gint;
       Y                  : in     Gint;
       Row                : out    Gint;
       Column             : out    Gint);
| Return the row and column matching a given pixel on the screen. Constraint_Error is raised if no such cell exists.
    procedure Get_Cell_Area
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Column             : in     Gint;
       Area               : out    Gdk.Rectangle.Gdk_Rectangle);
| Get the area of the screen that a cell is mapped to. Constraint_Error is raised if no such cell exists;
### Children
A Gtk_Sheet can contain some children, attached to some specific cells.
    procedure Put
      (Sheet              : access Gtk_Sheet_Record;
       Widget             : access Gtk.Widget.Gtk_Widget_Record'Class;
       X                  : in     Gint;
       Y                  : in     Gint);
| Put a new child at a specific location (in pixels) in the sheet.
    procedure Attach
      (Sheet              : access Gtk_Sheet_Record;
       Widget             : access Gtk.Widget.Gtk_Widget_Record'Class;
       Row                :        Gint;
       Col                :        Gint;
       Xoptions           :        Gtk.Enums.Gtk_Attach_Options
                           := Expand or Fill;
       Yoptions           :        Gtk.Enums.Gtk_Attach_Options
                           := Expand or Fill;
       Xpadding           :        Gint := 0;
       Ypadding           :        Gint := 0);
| Attach a child to a specific Cell in the sheet. X_Align and Y_Align should be between 0.0 and 1.0, indicating that the child should be aligned from the Left (resp. Top) to the Right (resp. Bottom) of the cell. If Row or Col is negative, the widget is attached to the row buttons or column buttons. Widget will not be moved if the cell is moved.
    procedure Attach_Floating
      (Sheet              : access Gtk_Sheet_Record;
       Widget             : access Gtk.Widget.Gtk_Widget_Record'Class;
       Row                :        Gint;
       Col                :        Gint);
| Attach a child at the current location or (Row, Col). If the cell is moved because of resizing or other reasons, Widget will be moved as well.
    procedure Move_Child
      (Sheet              : access Gtk_Sheet_Record;
       Widget             : access Gtk.Widget.Gtk_Widget_Record'Class;
       X                  : in     Gint;
       Y                  : in     Gint);
| Move a child of the table to a specific location in pixels. A warning is printed if Widget is not already a child of Sheet.
    function Get_Child_At
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint)
       return Gtk_Sheet_Child;
| Return the widget associated with the cell.
    function Get_Widget
      (Child              :        Gtk_Sheet_Child)
       return Gtk.Widget.Gtk_Widget;
| Return the widget in the child.
    procedure Button_Attach
      (Sheet              : access Gtk_Sheet_Record;
       Widget             : access Gtk.Widget.Gtk_Widget_Record'Class;
       Row                :        Gint;
       Col                :        Gint);
| Attach a new button in the row or column title. One of Row or Col must be negative (but only one). This can be used to modify the standard buttons that appear at the top of each column, or on the left of each row.
### Links / User_Data
You can associate any kind of data with a cell, just like you can associate user_data with all the widgets. Note that this uses a generic package, which must be instantiated at library level since it has internal clean up functions.
    procedure Link_Cell
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint;
       Link               : in     Data_Type);
| Associate some user specific data with a given cell.
    function Get_Link
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint)
       return Data_Type_Access;
| Return the user data associated with the cell. null is returned if the cell has no user data.
    procedure Remove_Link
      (Sheet              : access Gtk_Sheet_Record;
       Row                : in     Gint;
       Col                : in     Gint);
| Delete the user data associated with the cell.

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