/* ********************************************************************** *\
 *         Copyright IBM Corporation 1988,1991 - All Rights Reserved      *
 *        For full copyright information see:'andrew/config/COPYRITE'     *
\* ********************************************************************** */

/*
	$Disclaimer: 
*Permission to use, copy, modify, and distribute this software and its 
*documentation for any purpose is hereby granted without fee, 
*provided that the above copyright notice appear in all copies and that 
*both that copyright notice, this permission notice, and the following 
*disclaimer appear in supporting documentation, and that the names of 
*IBM, Carnegie Mellon University, and other copyright holders, not be 
*used in advertising or publicity pertaining to distribution of the software 
*without specific, written prior permission.
*
*IBM, CARNEGIE MELLON UNIVERSITY, AND THE OTHER COPYRIGHT HOLDERS 
*DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
*ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT 
*SHALL IBM, CARNEGIE MELLON UNIVERSITY, OR ANY OTHER COPYRIGHT HOLDER 
*BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY 
*DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 
*WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 
*ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
*OF THIS SOFTWARE.
* $
*/


 

/*
 * eqv.H
 * class header file for eqv.
 */


class eqview[eqv] : view {
overrides:
    DesiredSize(long width, long height, enum view_DSpass pass, long *widthp, long *heightp) returns enum view_DSattributes;
    Update();
    FullUpdate(enum view_UpdateType type, long left, long top, long width, long height);
    ReceiveInputFocus();
    LoseInputFocus();
    Hit (enum view_MouseAction action, long x, long y, long clicks) returns struct eqview *;
    SetDataObject(struct dataobject *dataObject);
    Print(FILE *f, char *process, char *final, int toplevel);

methods:
    Draw(struct eq *eqptr, struct formula *f, long x, long y) returns struct formula *;
    Find(struct eq *eqptr, long mx, long my, long restrict) returns long;
    CalculateCaret();
    DrawCaret();
    SetDotPosition(long newp);
    SetDotLength(long newl);
    GetDotPosition() returns long;
    GetDotLength() returns long;
    Changed(enum changed changed);

classprocedures:
    InitializeObject(struct eq *self) returns boolean;
    FinalizeObject(struct eqview *self);
    InitializeClass()returns boolean;

data:
/*
 * The equation pointer in the data object is not view-independent,
 * so the eqview cheats and simply contains a pointer to an equation.
 * Since the equation has markers in it, it doesn't qualify as a bona
 * fide view-independent data object.
 */
    long off_x, off_y;		/* offset from 0,0 to origin of equation */
    enum changed {
	EQVIEW_nothing,		/* nada */
	EQVIEW_caret,		/* just the caret */
	EQVIEW_eq,		/* the equation, maybe including caret */
	EQVIEW_everything	/* redraw the whole inset */
    } changed;			/* what changed for Update */
    long			/* caret or selection as follows: */
	caret_x,		/* left if selection, x position if caret */
	caret_y,		/* top if selection, y position if caret */
	selection_width,	/* width if selection, 0 if caret */
	selection_height;	/* height if selection, 0 if caret */
    boolean hasinputfocus;	/* doc'n says this is in struct view! */
    boolean embedded;	/* true if GetApplicationLayer is not called */
    struct keystate *keystate;	/* for keymap routines */
    struct menulist *normalMenus;  /* for menu routines */
    struct menulist *cutMenus;  /* for menu routines */
    struct mark	*dot;
    char *filename;		/* name of file read in */
};

#define Eq(self) ((struct eq *) ((self)->header.view.dataobject))