/* $XConsortium: toolkit.c,v 5.2 94/04/17 20:46:13 rws Exp $ */

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/*
 * toolkit.c  -- implements the toolkit-independent interface used
 * by the comparison tool.  This implementation uses XView.
 *
 * This interface is intended to isolate toolkit-dependent details
 * such as button creation and event handling into one place.
 * It is designed with knowledge only of XView and Xlib --
 * the interface should be sufficient to allow an implementation
 * in raw XLib, and it is hoped that implementation using
 * other toolkits would be reasonably straightforward.
 *
 * Note that this interface was designed with the specific purpose
 * of making a particular application - the comparison tool - as
 * portable as possible.  It is not meant to be a general toolkit interface
 * (that's what toolkits are for in the first place!).
 *
 * For all height, width, row, or column arguments, supplying a value
 * of -1 directs the function to use default or toolkit-determined
 * values.
 *
 * The application defines notification procedures as having no
 * arguments since we can't be sure all toolkits will call them
 * with the same arguments. Unfortunately, this forces greater use
 * of globals...
 */

#include <stdio.h>
#include "toolkit.h"

/*
 * tk_init(argc,argv) - initialize the toolkit.  The toolkit may
 * look for toolkit-specific arguments in the command-line input.
 */
void
tk_init(argc,argv)
int argc;
char *argv[];
{
    xv_init(XV_INIT_ARGS, argc, argv,
	0);
}
/*
 * TK_Main_Window
 * tk_create_main_window(label,height,width)
 *  Create a main application window with given label, height, and width.
 */
TK_Main_Window 
tk_create_main_window(label,height,width, display_return)
    char *label; 
    int height,width;
    Display **display_return;
{
    Frame frame;

    frame = xv_create(NULL,FRAME,
		FRAME_LABEL,	label,
		0);
    if (frame==NULL) fatal("tk_create_main_window: frame creation failed\n");
    if (height != -1) xv_set(frame, XV_HEIGHT, height,0);
    if (width != -1) xv_set(frame, XV_WIDTH, width,0);
    *display_return = (Display *)xv_get(frame, XV_DISPLAY);
    return(frame);

}


/*
 * TK_Control_Window
 * tk_create_control_window(parent,x, y, height,width)
 * Create a subwindow suitable for buttons, etc. that is a child of
 * the given parent.  A -1 for any of x, y, height or width 
 * yields the default or toolkit-determined value.
 */
TK_Control_Window
tk_create_control_window(parent,x,y,height,width)
    TK_Main_Window parent;
    int x,y,height,width;
{
    Panel panel;

    panel = xv_create(parent,PANEL,
		0);
    if (panel == NULL) fatal("tk_create_control_window: panel creation failed\n");
    if (x != -1) xv_set(panel, XV_X, x, 0);
    if (y != -1) xv_set(panel, XV_Y, y, 0);
    if (height != -1) xv_set(panel, XV_HEIGHT, height,0);
    if (width != -1) xv_set(panel, XV_WIDTH, width,0);
    return (panel);
}


/*
 * Drawable
 * tk_create_X_drawable_window(parent,height,width,
 *			repaint_proc,display_return);
 * Create an X window as a subwindow of the supplied parent window,
 * returning its id.  *display_return is set to the current default display. 
 */
Drawable
tk_create_X_drawable_window(parent,height,width,
			repaint_proc,display_return)
    TK_Main_Window parent;
    int height,width,(*repaint_proc)();
    Display **display_return;
{
    Canvas canvas;
    Pixwin *pixwin;
    Drawable drawable;

    canvas = xv_create(parent,CANVAS,
		CANVAS_X_PAINT_WINDOW, TRUE,
		CANVAS_REPAINT_PROC, repaint_proc,
		0);
    if (canvas == NULL) fatal("tk_create_X_drawable_window: win creation failed\n");
    if (height != -1) xv_set(canvas, XV_HEIGHT, height,0);
    if (width != -1) xv_set(canvas, XV_WIDTH, width,0);

    pixwin = canvas_pixwin(canvas);
    *display_return = (Display *)xv_get(pixwin, XV_DISPLAY);
    drawable = (Drawable)xv_get(pixwin, XV_XID);
    return(drawable);
    
}

XID
tk_get_xid(window)
    Frame window;
{
    return (XID) xv_get(window, XV_XID);
}

/*
 * tk_create_button(control_win,row, col,label,proc,active_status)
 * create a button in the given control window, at designated row & col.
 * proc identifies a procedure to be called when the button is pressed.
 */
TK_Button
tk_create_button(control_win,row,col,label,proc,active_status)
    TK_Control_Window control_win;
    int row, col;
    char *label;
    int (*proc)();
    int active_status;
{
    Panel_item button_item;

    button_item = xv_create(control_win,PANEL_BUTTON,
		PANEL_LABEL_STRING,	label,
		PANEL_NOTIFY_PROC,	proc,
		PANEL_INACTIVE,		active_status,
		0);
    if (button_item == NULL) fatal("tk_create_button: creation failed\n");
    if (row != -1) xv_set(button_item, PANEL_ITEM_Y, xv_rows(control_win,row),0);
    if (col != -1) xv_set(button_item, PANEL_ITEM_X, xv_cols(control_win,col),0);
    return (button_item);
}

/*
 * tk_activate_button(button) - sets the active status of the button
 * to TK_BUTTON_ACTIVE
 */
void
tk_activate_button(button)
    TK_Button button;
{
    xv_set(button, PANEL_INACTIVE, TK_BUTTON_ACTIVE, 0);
}
/*
 * tk_deactivate_button(button) - sets the active status of the button
 * to TK_BUTTON_INACTIVE
 */
void
tk_deactivate_button(button)
    TK_Button button;
{
    xv_set(button, PANEL_INACTIVE, TK_BUTTON_INACTIVE, 0);
}

/*
 * tk_set_button_label(button,label) - sets the button label to
 * the label given.
 */
void
tk_set_button_label(button,label)
    TK_Button button;
    char *label;
{
    xv_set(button, PANEL_LABEL_STRING, label, 0);
}

/*
 * TK_Message_Item
 * tk_create_message(control_win,row, col,init_string)
 * create a text output item  in the given control window, 
 * at designated row & col, with the initial contents init_string.
 */
TK_Message_Item
tk_create_message_item(control_win,row,col,init_string)
    TK_Control_Window control_win;
    int row, col;
    char *init_string;
{
    Panel_item message_item;

    message_item = xv_create(control_win,PANEL_MESSAGE,
		PANEL_LABEL_STRING,	init_string,
		0);
    if (message_item == NULL) fatal("tk_create_message_item: creation failed\n");
    if (row != -1) xv_set(message_item, PANEL_ITEM_Y, xv_rows(control_win,row),0);
    if (col != -1) xv_set(message_item, PANEL_ITEM_X, xv_cols(control_win,col),0);
    return(message_item);
}

/*
 * tk_set_message(msg_item, text) - sets the text tring displayed
 * in msg_item to "text".
 */
void
tk_set_message(msg_item, text)
    TK_Message_Item msg_item;
    char *text;
{
    xv_set(msg_item,
	PANEL_LABEL_STRING,	text,
	0);
}


/* 
 * TK_List
 * tk_create_list(control_win,row,col,notify_proc)
 */
TK_List
tk_create_list(control_win,row,col,notify_proc)
    TK_Control_Window control_win;
    int row,col, (*notify_proc)();
{
    Panel_item list_item;

    list_item = xv_create(control_win, PANEL_LIST,
		PANEL_NOTIFY_PROC,	notify_proc,
		PANEL_LIST_DISPLAY_ROWS, 5,
		0);
    if (list_item == NULL) fatal("tk_create_list: creation failed\n");
    if (row != -1) xv_set(list_item, PANEL_ITEM_Y, xv_rows(control_win,row),0);
    if (col != -1) xv_set(list_item, PANEL_ITEM_X, xv_cols(control_win,col),0);
    return ((TK_List)list_item);
}


/*
 * char *
 * tk_get_selected_item(list,index_return) - return a pointer to the
 * string of the currently selected list item, and set index_return
 * to that element's index.  If no list item is selected, return NULL.
 */
char *
tk_get_selected_list_item(list,index_return)
    TK_List list;
    int *index_return;
{
    char *string;
    int i, nrows;
    int sel=0;

    nrows = (int)xv_get(list, PANEL_LIST_NROWS);
    for (i=0; 
	i<nrows,!(sel=(int)xv_get(list,PANEL_LIST_SELECTED,i));  i++);
    if (sel) {
	*index_return = i;
	return ((char *)xv_get(list,PANEL_LIST_STRING,i));
    } else {
	return (NULL);
    }
	
}

/*
 * char *
 * tk_get_list_item(list,index) - return a pointer to the string of
 * of the list item specified by index.
 */
char *
tk_get_list_item(list,index)
    TK_List list;
    int index;
{
    return ((char*)xv_get(list, PANEL_LIST_STRING, index));
}

/*
 * int
 * tk_get_list_length(list) - return the number of rows in the list
 */
int
tk_get_list_length(list)
    TK_List list;
{
    return ((int)xv_get(list, PANEL_LIST_NROWS));
}

/*
 * tk_set_list_item(list,index,string): set the indexed list item to
 * have value "string".  Note that this function is only for changing
 * the value; tk_insert_list_item should be used to create the item.
 */
void
tk_set_list_item(list,index,string)
    TK_List list;
    int index;
    char *string;
{
    xv_set(list, PANEL_LIST_STRING,index,string,
	    0);
}

void
tk_insert_list_item(list,index,string)
    TK_List list;
    int index;
    char *string;
{
    xv_set(list, PANEL_LIST_INSERT,index,
	    0);
    xv_set(list, PANEL_LIST_STRING,index,string,
	    0);
}

/*
 * tk_delete_list_item: delete the list item indexed by index; if there
 * is an item after it, make that the selected item.
 */
void
tk_delete_list_item(list,index)
    TK_List list;
    int index;
{
    xv_set(list, PANEL_LIST_DELETE,index,
	    0);
    if ((int)xv_get(list,PANEL_LIST_NROWS) > index) {
	xv_set(list, PANEL_LIST_SELECT, index, TRUE,
	    0);
    } 
}

/*
 * tk_main_loop() - start the main event-handling loop
 */
void
tk_main_loop(main_win)
    TK_Main_Window main_win;
{
    xv_main_loop(main_win);
}

static
fatal(s)
    char *s;
{
    fprintf(stderr, "%s\n");
    exit(1);
}