coolwidget.h

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/* coolwidget.h - main header file
   Copyright (C) 1996-2000 Paul Sheer

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307, USA.
 */

#ifndef COOL_WIDGET_H
#define COOL_WIDGET_H

#include <config.h>
#include <stdio.h>
#include <my_string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>

#include <errno.h>
#ifdef HAVE_SYS_ERRNO_H
#include <sys/errno.h>
#endif

#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#   include <unistd.h>
#endif

#ifdef HAVE_SYS_SELECT_H
#  include <sys/select.h>
#endif

#if HAVE_DIRENT_H
#include <dirent.h>
#define NAMLEN(dirent) strlen((dirent)->d_name)
#else
#define dirent direct
#define NAMLEN(dirent) (dirent)->d_namlen
#if HAVE_SYS_NDIR_H
#include <sys/ndir.h>
#endif
#if HAVE_SYS_DIR_H
#include <sys/dir.h>
#endif
#if HAVE_NDIR_H
#include <ndir.h>
#endif
#endif

#include <sys/stat.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <X11/Intrinsic.h>
#include "global.h"
#include "vgagl.h"
#include "lkeysym.h"

#include "stringtools.h"
#include "app_glob.c"
#include "drawings.h"
#include "3dkit.h"
#include "xdnd.h"
#include "mousemark.h"
#include "font.h"
 
#define ALRM_PER_SECOND 50

typedef struct initialisation {
    char *name, *display, *geometry, *font, *widget_font, *bg;
    char *fg_red, *fg_green, *fg_blue;	/* string doubles */
#define CINIT_OPTION_USE_GREY 1
#define CINIT_OPTION_VERBOSE 2
#define CINIT_OPTION_WAIT_FOR_DISPLAY 4
    unsigned long options;
    char *look;
} CInitData;


#define CEdit WEdit

/* edit this */
/* #define u_32bit_t unsigned long */
#define u_32bit_t unsigned int
#define word unsigned short
#define byte unsigned char

#define WIDGET_MAGIC_BEGIN 0x6e065f4d
#define WIDGET_MAGIC_END 0x54f560e9

#define TEXT_SET_COLUMN		1
#define TEXT_SET_LINE		2
#define TEXT_SET_POS		3
#define TEXT_SET_CURSOR_LINE	4

/* These are all the widget kinds (the kind member of the widget structure) */
enum { \
    C_NOT_A_WIDGET, C_BUTTON_WIDGET, C_WINDOW_WIDGET, C_BAR_WIDGET, C_SUNKEN_WIDGET, \
    C_VERTSCROLL_WIDGET, C_HORISCROLL_WIDGET, C_HORSCROLL_WIDGET, C_TEXTINPUT_WIDGET, \
    C_TEXTBOX_WIDGET, C_TEXT_WIDGET, C_BWIMAGE_WIDGET, C_SPREAD_WIDGET, \
    C_PROGRESS_WIDGET, C_BITMAP_WIDGET, C_BITMAPBUTTON_WIDGET, C_SWITCH_WIDGET, \
    C_8BITIMAGE_WIDGET, C_THREED_WIDGET, C_PICTURE_WIDGET, C_EDITOR_WIDGET, \
    C_MENU_WIDGET, C_MENU_BUTTON_WIDGET, C_ALARM_WIDGET, C_FIELDED_TEXTBOX_WIDGET, \
    C_TOOLHINT_WIDGET, C_ICON_WIDGET, C_STATUS_WIDGET, C_RXVT_WIDGET, C_UNICODE_WIDGET
};

/* the user can start creating his widgets from 100: */
#define C_LAST_WIDGET 100

/*
   Here are some addition events that you may recieve or send using
   CNextEvent instead of XNextEvent. (LASTEvent = 35)
 */
/* this comes every 1/CGetCursorBlinkRate() of a second */
#define AlarmEvent		(LASTEvent + 1)
/* This you won't recieve ---  it is used for joining small expose regions together */
#define InternalExpose		(LASTEvent + 2)
/* Send this event to the editor to force the editor widget to execute a command */
#define EditorCommand		(LASTEvent + 3)
/* Comes every 1/ALRM_PER_SECOND of a second (see initapp.c for correct amount) */
#define TickEvent		(LASTEvent + 4)
/* a button repeat event happens when a mouse button is pressed and held down */
#define ButtonRepeat		(LASTEvent + 5)
/* When you recieve this it is because the window manager wants the app to
   quit. You would recieve this when the user has pressed on the main window. */
#define QuitApplication		(LASTEvent + 6)
#define CLASTEvent		(LASTEvent + 7)

/* Library is limited to this number of widgets at once */
#define MAX_NUMBER_OF_WIDGETS	1024

/* one of the (long int) "CoolBlue" colors (0-15) that make up the windows, buttons etc */
#define color_widget(i)		color_pixels[i]
/* one of a 3x3x3 (RxGxB) color palette. eg R=2, G=1, B=0 is color_palette(19). */
#define color_palette(i)	color_pixels[(i) + 16]
/* 0-64 grey levels (not supprted unless specified in config.h) */
#define color_grey(i)		color_pixels[(i) + 43]

int allocate_color (char *color);

/* draw a line in the window d */
#define CLine(d, x, y, w, h)		XDrawLine(CDisplay, d, CGC, x, y, w, h)
/* rectangle */
#define CRectangle(d, x, y, w, h)	XFillRectangle(CDisplay, d, CGC, x, y, w, h)
/* rectangle */
#define CBox(d, x, y, w, h)		XDrawRectangle(CDisplay, d, CGC, x, y, w, h)
/* set the foreground color */
#define CSetColor(c)			XSetForeground(CDisplay, CGC, c)
/* set the background color */
#define CSetBackgroundColor(c)		XSetBackground(CDisplay, CGC, c)
/* width of text in pixels in the current font */
int CImageTextWidth (const char *s, int l);
/* width of a string in pixels in the current font Wide Character */
int CImageTextWidthWC (XChar2b * s, wchar_t * swc, int l);
/* width of a string in pixels in the current font */
int CImageStringWidth (const char *s);
/* draw image string */
int CImageString (Window w, int x, int y, const char *s);
/* draw image text */
int CImageText (Window w, int x, int y, const char *s, int l);
/* draw image string Wide Character - supply both wc and normal string formats */
int CImageTextWC (Window w, int x, int y, XChar2b * s, wchar_t * swc, int l);


unsigned char *wcrtomb_ucs4_to_utf8 (wchar_t c);

#define SCREEN_ASPECT_RATIO 1.333

/* some standard colors */
/* the color of the "flat" of a window */
#define COLOR_FLAT ((*look->get_button_flat_color) ())

/* used for NeXTish drawings */
#define COLOR_DARK  color_widget(5)
#define COLOR_LIGHT color_widget(8)

#define COLOR_WHITE color_widget(15)
#define COLOR_BLACK color_widget(0)

/* SelectInput for various types of widgets */
#define INPUT_EXPOSE (KeyPressMask | KeyReleaseMask | ExposureMask | \
			StructureNotifyMask | VisibilityChangeMask | \
			LeaveWindowMask | EnterWindowMask | PointerMotionMask)
#define INPUT_KEY (ExposureMask | ButtonPressMask | ButtonReleaseMask | \
			KeyPressMask | KeyReleaseMask | ButtonMotionMask | \
			StructureNotifyMask | PropertyChangeMask | \
			LeaveWindowMask | EnterWindowMask | PointerMotionMask)
#define INPUT_MOTION INPUT_KEY
#define INPUT_BUTTON (INPUT_KEY | KeyReleaseMask)

/* internal */
#define WINDOW_MAPPED 1
#define WINDOW_FOCUS_WHEN_MAPPED 2

/* menu callback function */
typedef void (*callfn) (unsigned long data);

struct menu_item {
    char *text;
    char hot_key;
    callfn call_back;
    unsigned long data;		/* data for user. it is passed to callfn */
};

#define MENU_ITEM_BASIC(text,hot_key,callback,data) \
    text, hot_key, callback, data

/* not supported
   #define MENU_ITEM_OPTION(text,hot_key,option) \
   text, hotkey, (callfn) 1, (int *) option
   #define MENU_ITEM_SECOND_LEVEL(text,hotkey,menuitems) \
   text, hotkey, (callfn) 2, (struct menu_item *) menuitems
 */

#define ClassOfVisual(v) ((v)->class)

/* spacing between widgets in pixels */
#define WIDGET_SPACING option_interwidget_spacing
#define WIDGET_FOCUS_RING ((*look->get_focus_ring_size) ())
#define WINDOW_EXTRA_SPACING ((*look->get_extra_window_spacing) ())

/* spacing between the bevel and the text of the text widget */
#define TEXT_RELIEF 3

/* don't change this without adjusting white fill in inputwidget.c */
#define TEXTINPUT_RELIEF 1
#define BUTTON_RELIEF 2

/* auto widget sizing (use instead of width or height to work out the width
   of widgets that have text in them) */
#define AUTO_WIDTH		-32000
#define AUTO_HEIGHT		-32001
#define AUTO_SIZE		AUTO_WIDTH, AUTO_HEIGHT

#define TEXTINPUT_LAST_INPUT	((char *) 1)

/* font offsets for drawing */
#define FONT_OFFSET_X 0

#define EDIT_FRAME_W 7
#define EDIT_FRAME_H 7

/* if this gets changed, the cursor rendering (upside down "L") in editdraw and
   cooledit.c must be adjusted so that the cursor is erased properly */
#define FONT_OFFSET_Y		FONT_BASE_LINE


/*
   A reduced event. This structure is returned by CNextEvent, and
   contains most of the things you may need. Anything more is contained
   in XEvent.
 */
typedef struct {
/* widget's identification string */
    char *ident;
    int i;

/* data */
    int x;
    int y;
    int xt;
    int yt;

    Window window;

/* enumerated above */
    int kind;
    int type;

/* if a key was pressed, this is the KeySym */
    int key;
    char xlat[8];	/* translation */
    long insert;
    Time time;
    unsigned int button;

/* 1 for a double click */
    int double_click;
    unsigned int state;

/* if text was returned by the event */
    char *text;

/* if the event was already handled by a callback routine */
    char handled;

/* if the event coused an editor command */
    int command;		/* editor commands */
} CEvent;


/* This is the structure of a widget. It is presently 232 bytes
   long. With 100 widgets on at once, this is only 23k, so the
   inefficiency in having only one structure is justified. */
struct cool_widget {
    char ident[33];		/*unique identifying string given by user */
/* for debugging */
    u_32bit_t magic_begin;

/* essentials */
    Window winid;		/* X integer window id of widget */
    Window parentid;		/* parent window of window */
    Window mainid;		/* main window of window */
    int (*eh) (struct cool_widget *, XEvent *, CEvent *);	/* internal event handler */
    int (*callback_before) (struct cool_widget *, XEvent *, CEvent *);	/* user event handler called before internal handler */
    int (*callback) (struct cool_widget *, XEvent *, CEvent *);		/* user event handler */
    void (*destroy) (struct cool_widget *);	/*only a few widgets need special distruction */
    void (*resize) (int, int, int, int, int *, int *, int *, int *);	/* when the parent is resized,
									   the new size and position are 
									   returned by this function */
    void (*render) (struct cool_widget *w);
    char ** (*get_line) (void *data, int line_number, int *num_fields, int *tagged);	/* returns a text box line */

/* void resize (
 *          old_parent_w, old_parent_h, 
 *          new_parent_w, new_parent_h, 
 *          int *new_this_widget_x, int *new_this_widget_y, 
 *          int *new_this_widget_w, int *new_this_widget_h
 *      );
 */
    void (*scroll_bar_link) (struct cool_widget *, struct cool_widget *, XEvent *, CEvent *, int);
    void (*scroll_bar_extra_render) (struct cool_widget *);
/*
 * void scroll_bar_link (scrollbar, widget, xevent, cwevent, which_button_1_to_5);
 */
/* basics */
    int width, height;		/* of window --- just to save looking it up */
    int x, y;			/* position in parent --- top left corner */
    int kind;			/* one of C??????_WIDGET above */
    char disabled;		/* displayed, but not functioning */
    char takes_focus;		/* can this widget take input focus? */
    char mapped;		/* has window yet been mapped */
    char nothing;		/* pad */

/* data */
    char *label;		/* text that gets drawn into button */
    char *graphic;		/* Possibly a bitmap to go onto the button */
    int *tab;			/* columns for spreadsheat widget */
    char *text;			/* text goes into textbox textinput and text widgets */
    char *headings;		/* headings of spreadsheet columns */
    GraphicsContext *gl_graphicscontext;	/*for svgalib image widgets */
    XImage *ximage;		/* for X images picture widgets */
    Pixmap pixmap;		/* for pixmaps */
    CPicture *pic;		/* for lines, circles, rects and arcs. */
    TD_Solid *solid;
    char *toolhint;		/* hints for buttons */
    struct editor_widget *editor;
    struct menu_item *menu;

/* Positions. What they are used for depends on the kind of widget. See coolwidget.c for an explanation */
    long cursor;
    long column;
    long numlines;
    long firstline;
    long current;