/*****************************************************************************    Copyright (C) 1994,1997 Ivan A. Curtis.  All rights reserved.This code must not be re-distributed without these copyright notices intact.**************************************************************************************************************************************************************Filename:	~icurtis/src/mx/alert.cDescription:	Update History:   (most recent first)   I. Curtis   9-Apr-97 12:02 -- Updated   I. Curtis  22-Mar-94 23:11 -- Created.******************************************************************************/#include <stdlib.h>#include "basic.h"#include "alert.h"/******************************************** * Handle an event for an alert             * * Exposure events always cause a re-draw.  * * Enter/Leave events are only processed if * *            alert->inside is non-negative * * Button Press/Release events are only     * *         processed if alert->momentary is * *         TRUE                             * ********************************************/int mx_alert_event(Display *display, int screen, XEvent *event,		   mx_alert *alert, int *done, int *x, int *y){  switch(event->type) {  case Expose:    if (event->xexpose.window == alert->window) {      mx_items_draw(display, alert->window, alert->app,		    alert->item, alert->start_item, alert->max_items,		    alert->width, alert->height, 0, 0);      return True;    }    break;  case ButtonRelease:    if (event->xbutton.window == alert->window) {      if  (alert->momentary == 1) {	*x = event->xbutton.x_root;	*y = event->xbutton.y_root;	*done = 1;      }      return True;    }    break;  case ButtonPress:    if (event->xbutton.window == alert->window) {      if (alert->momentary == 0) {	*x = event->xbutton.x_root;	*y = event->xbutton.y_root;	*done = 1;      }      return True;    }    break;  case LeaveNotify:    if (event->xcrossing.window == alert->window) {      if (alert->inside == 1) {	XFillRectangle(display, alert->window, alert->app->gcf,		       0, 0,		       alert->width, alert->height);	alert->inside = 0;      }      return True;    }    break;  case EnterNotify:    if (event->xcrossing.window == alert->window) {      if (alert->inside == 0) {	XFillRectangle(display, alert->window, alert->app->gcf,		       0, 0,		       alert->width, alert->height);	alert->inside = 1;      }      return True;    }    break;  default:    break;  }  return False;}/***************************************************************************** * Pop up an alert on the root window                                        * * at position x, y                                                          * *****************************************************************************/int mx_popup_alert(Display *display, int screen, mx_panel *main_panel,		   mx_panel *resp_panel,		   int *x, int *y){  XEvent event;  mx_alert title, body, *button;  int bod_height, n_buttons, b, b_xofs, b_yofs, b_dx;  int choice, done;  button = NULL;  b_xofs = b_yofs = b_dx = 0;  if (!main_panel)    return -1;  title.app = main_panel->app;  title.width = main_panel->width + 2 * main_panel->app->item_border;  title.height = main_panel->app->ascent + main_panel->app->descent +    2 * main_panel->app->item_border;  title.start_item = 0;  title.max_items = 1;  title.item = main_panel->item + main_panel->first_item;  body.app = main_panel->app;  body.width = main_panel->width + 2 * main_panel->app->item_border;  body.height = main_panel->app->ascent + main_panel->app->descent +    2 * main_panel->app->item_border;  body.start_item = 0;  body.max_items = main_panel->last_item - main_panel->first_item;  body.item = main_panel->item + main_panel->first_item + 1;  bod_height = body.max_items * body.height;  if (resp_panel) {    bod_height = (body.max_items + 2) * body.height;    n_buttons = resp_panel->last_item - resp_panel->first_item + 1;    b_yofs = title.height + title.app->win_border +       body.max_items * body.height + body.height / 2;    b_xofs = body.height / 2;    b_dx = body.width - body.height -      (resp_panel->width + resp_panel->app->item_border * 2 +        resp_panel->app->win_border * 2);    if (n_buttons > 2)      b_dx = b_dx / (n_buttons - 1);    button = (mx_alert *)malloc(sizeof(mx_alert) * n_buttons);    for (b = 0; b < n_buttons; b++) {      button[b].app = resp_panel->app;      button[b].width = resp_panel->width + 2 * resp_panel->app->item_border;      button[b].height = resp_panel->app->ascent + resp_panel->app->descent +	2 * resp_panel->app->item_border;      button[b].start_item = 0;      button[b].max_items = 1;      button[b].item = resp_panel->item + resp_panel->first_item + b;    }  }  else {    bod_height = body.max_items * body.height;    n_buttons = 0;  }  mx_adjust_xy(display, title.width + 2 * title.app->win_border,	       (title.height * (body.max_items + 1) +		3 * title.app->win_border),	       x, y);				/* open the alert window */  title.window =    mx_transient_window_open(display, screen, title.app->win_border, *x, *y,			     title.width, title.height * title.max_items);  XSelectInput(display, title.window,	       ExposureMask | OwnerGrabButtonMask |	       ButtonPressMask | ButtonReleaseMask |	       EnterWindowMask | LeaveWindowMask);  title.inside = -1;  if (resp_panel)    title.momentary = -1;  else    title.momentary = 0;  body.window =    mx_transient_window_open(display, screen, body.app->win_border,			     *x, *y + title.height + title.app->win_border,			     body.width, bod_height);  XSelectInput(display, body.window,	       ExposureMask | OwnerGrabButtonMask |	       ButtonPressMask | ButtonReleaseMask |	       EnterWindowMask | LeaveWindowMask);  body.inside = -1;  if (resp_panel)    body.momentary = -1;  else    body.momentary = 0;  for (b = 0; b < n_buttons; b++) {    button[b].window =       mx_transient_window_open(display, screen, button[b].app->win_border,			       *x + b_xofs + b_dx * b,			       *y + b_yofs,			       button[b].width, button[b].height);    XSelectInput(display, button[b].window,		 ExposureMask | OwnerGrabButtonMask |		 ButtonPressMask | ButtonReleaseMask |		 EnterWindowMask | LeaveWindowMask);    button[b].inside = 0;    button[b].momentary = 0;  }  done = 0;  choice = -1;  while (!done) {    XNextEvent(display, &event);    if (mx_alert_event(display, screen, &event, &title, &done, x, y))      continue;    if (mx_alert_event(display, screen, &event, &body, &done, x, y))      continue;    for (b = 0; b < n_buttons; b++) {      if (mx_alert_event(display, screen, &event, button + b, &done, x, y)) {	if (done)	  choice = b;	break;      }    }    if (event.type == Expose && title.app->expose_fun) {      if ((*(title.app->expose_fun))(&event))	continue;    }    /*     *     if (event.type == ButtonRelease){     *       *x = event.xbutton.x_root;     *       *y = event.xbutton.y_root;     *       done = 1;     *       choice = -1;     *     }     */  }  mx_window_close(display, title.window);  mx_window_close(display, body.window);  for (b = 0; b < n_buttons; b++) {    mx_window_close(display, button[b].window);  }  free(button);  return choice;}