fl_file_chooser2.cxx

来自「SRI international 发布的OAA框架软件」· CXX 代码 · 共 1,164 行 · 第 1/3 页

//
// 'Fl_File_Chooser::rescan()' - Rescan the current directory.
//

void
Fl_File_Chooser::rescan()
{
  char	pathname[1024];		// New pathname for filename field


  // Clear the current filename
  strlcpy(pathname, directory_, sizeof(pathname));
  if (pathname[0] && pathname[strlen(pathname) - 1] != '/') {
    strlcat(pathname, "/", sizeof(pathname));
  }
//  puts("Setting fileName in rescan()");
  fileName->value(pathname);

  if (type_ & DIRECTORY)
    okButton->activate();
  else
    okButton->deactivate();

  // Build the file list...
  fileList->load(directory_, sort);

  // Update the preview box...
  update_preview();
}


//
// 'Fl_File_Chooser::showChoiceCB()' - Handle show selections.
//

void
Fl_File_Chooser::showChoiceCB()
{
  const char	*item,			// Selected item
		*patstart;		// Start of pattern
  char		*patend;		// End of pattern
  char		temp[1024];		// Temporary string for pattern


  item = showChoice->text(showChoice->value());

  if (strcmp(item, custom_filter_label) == 0) {
    if ((item = fl_input(custom_filter_label, pattern_)) != NULL) {
      strlcpy(pattern_, item, sizeof(pattern_));

      quote_pathname(temp, item, sizeof(temp));
      showChoice->add(temp);
      showChoice->value(showChoice->size() - 2);
    }
  } else if ((patstart = strchr(item, '(')) == NULL) {
    strlcpy(pattern_, item, sizeof(pattern_));
  } else {
    strlcpy(pattern_, patstart + 1, sizeof(pattern_));
    if ((patend = strrchr(pattern_, ')')) != NULL) *patend = '\0';
  }

  fileList->filter(pattern_);
  rescan();
}


//
// 'Fl_File_Chooser::update_favorites()' - Update the favorites menu.
//

void
Fl_File_Chooser::update_favorites()
{
  int		i;			// Looping var
  char		pathname[1024],		// Pathname
		menuname[2048];		// Menu name
  const char	*home;			// Home directory


  favoritesButton->clear();
  favoritesButton->add("bla");
  favoritesButton->clear();
  favoritesButton->add(add_favorites_label, FL_ALT + 'a', 0);
  favoritesButton->add(manage_favorites_label, FL_ALT + 'm', 0, 0, FL_MENU_DIVIDER);
  favoritesButton->add(filesystems_label, FL_ALT + 'f', 0);
    
  if ((home = getenv("HOME")) != NULL) {
    quote_pathname(menuname, home, sizeof(menuname));
    favoritesButton->add(menuname, FL_ALT + 'h', 0);
  }

  for (i = 0; i < 100; i ++) {
    sprintf(menuname, "favorite%02d", i);
    prefs_.get(menuname, pathname, "", sizeof(pathname));
    if (!pathname[0]) break;

    quote_pathname(menuname, pathname, sizeof(menuname));

    if (i < 10) favoritesButton->add(menuname, FL_ALT + '0' + i, 0);
    else favoritesButton->add(menuname);
  }

  if (i == 100) ((Fl_Menu_Item *)favoritesButton->menu())[0].deactivate();
}


//
// 'Fl_File_Chooser::update_preview()' - Update the preview box...
//

void
Fl_File_Chooser::update_preview()
{
  const char		*filename;	// Current filename
  Fl_Shared_Image	*image,		// New image
			*oldimage;	// Old image
  int			pbw, pbh;	// Width and height of preview box
  int			w, h;		// Width and height of preview image


  if (!previewButton->value()) return;

  if ((filename = value()) == NULL) image = NULL;
  else {
    window->cursor(FL_CURSOR_WAIT);
    Fl::check();

    image = Fl_Shared_Image::get(filename);

    if (image) {
      window->cursor(FL_CURSOR_DEFAULT);
      Fl::check();
    }
  }

  oldimage = (Fl_Shared_Image *)previewBox->image();

  if (oldimage) oldimage->release();

  previewBox->image(0);

  if (!image) {
    FILE	*fp;
    int		bytes;
    char	*ptr;

    if (filename) fp = fopen(filename, "rb");
    else fp = NULL;

    if (fp != NULL) {
      // Try reading the first 1k of data for a label...
      bytes = fread(preview_text_, 1, sizeof(preview_text_) - 1, fp);
      preview_text_[bytes] = '\0';
      fclose(fp);
    } else {
      // Assume we can't read any data...
      preview_text_[0] = '\0';
    }

    window->cursor(FL_CURSOR_DEFAULT);
    Fl::check();

    // Scan the buffer for printable chars...
    for (ptr = preview_text_; *ptr && (isprint(*ptr) || isspace(*ptr)); ptr ++);

    if (*ptr || ptr == preview_text_) {
      // Non-printable file, just show a big ?...
      previewBox->label(filename ? "?" : 0);
      previewBox->align(FL_ALIGN_CLIP);
      previewBox->labelsize(100);
      previewBox->labelfont(FL_HELVETICA);
    } else {
      // Show the first 1k of text...
      int size = previewBox->h() / 20;
      if (size < 6) size = 6;
      else if (size > 14) size = 14;

      previewBox->label(preview_text_);
      previewBox->align((Fl_Align)(FL_ALIGN_CLIP | FL_ALIGN_INSIDE |
                                   FL_ALIGN_LEFT | FL_ALIGN_TOP));
      previewBox->labelsize((uchar)size);
      previewBox->labelfont(FL_COURIER);
    }
  } else {
    pbw = previewBox->w() - 20;
    pbh = previewBox->h() - 20;

    if (image->w() > pbw || image->h() > pbh) {
      w   = pbw;
      h   = w * image->h() / image->w();

      if (h > pbh) {
	h = pbh;
	w = h * image->w() / image->h();
      }

      oldimage = (Fl_Shared_Image *)image->copy(w, h);
      previewBox->image((Fl_Image *)oldimage);

      image->release();
    } else {
      previewBox->image((Fl_Image *)image);
    }

    previewBox->align(FL_ALIGN_CLIP);
    previewBox->label(0);
  }

  previewBox->redraw();
}


//
// 'Fl_File_Chooser::value()' - Return a selected filename.
//

const char *			// O - Filename or NULL
Fl_File_Chooser::value(int f)	// I - File number
{
  int		i;		// Looping var
  int		fcount;		// Number of selected files
  const char	*name;		// Current filename
  char		*slash;		// Trailing slash, if any
  static char	pathname[1024];	// Filename + directory


  if (!(type_ & MULTI)) {
    name = fileName->value();
    if (!name || !name[0]) return NULL;
    else if (fl_filename_isdir(name)) {
      if (type_ & DIRECTORY) {
        // Strip trailing slash, if any...
        strlcpy(pathname, name, sizeof(pathname));
	slash = pathname + strlen(pathname) - 1;
	if (*slash == '/') *slash = '\0';
        return pathname;
      } else return NULL;
    } else return name;
  }

  for (i = 1, fcount = 0; i <= fileList->size(); i ++)
    if (fileList->selected(i)) {
      // See if this file is a directory...
      name = fileList->text(i);

      if (directory_[0]) {
	snprintf(pathname, sizeof(pathname), "%s/%s", directory_, name);
      } else {
	strlcpy(pathname, name, sizeof(pathname));
      }

      if (!fl_filename_isdir(pathname)) {
        // Nope, see if this this is "the one"...
	fcount ++;
	if (fcount == f) return (pathname);
      }
    }

  return (NULL);
}


//
// 'Fl_File_Chooser::value()' - Set the current filename.
//

void
Fl_File_Chooser::value(const char *filename)	// I - Filename + directory
{
  int	i,					// Looping var
  	fcount;					// Number of items in list
  char	*slash;					// Directory separator
  char	pathname[1024];				// Local copy of filename


//  printf("Fl_File_Chooser::value(\"%s\")\n", filename == NULL ? "(null)" : filename);

  // See if the filename is the "My System" directory...
  if (filename == NULL || !filename[0]) {
    // Yes, just change the current directory...
    directory(filename);
    fileName->value("");
    okButton->deactivate();
    return;
  }

  // Switch to single-selection mode as needed
  if (type_ & MULTI)
    type(SINGLE);

  // See if there is a directory in there...
  fl_filename_absolute(pathname, sizeof(pathname), filename);

  if ((slash = strrchr(pathname, '/')) == NULL)
    slash = strrchr(pathname, '\\');

  if (slash != NULL) {
    // Yes, change the display to the directory... 
    if (!fl_filename_isdir(pathname)) *slash++ = '\0';

    directory(pathname);
    if (*slash == '/') slash = pathname;
  } else {
    directory(".");
    slash = pathname;
  }

  // Set the input field to the absolute path...
  if (slash > pathname) slash[-1] = '/';

  fileName->value(pathname);
  fileName->position(0, strlen(pathname));
  okButton->activate();

  // Then find the file in the file list and select it...
  fcount = fileList->size();

  fileList->deselect(0);
  fileList->redraw();

  for (i = 1; i <= fcount; i ++)
#if defined(WIN32) || defined(__EMX__)
    if (strcasecmp(fileList->text(i), slash) == 0) {
#else
    if (strcmp(fileList->text(i), slash) == 0) {
#endif // WIN32 || __EMX__
//      printf("Selecting line %d...\n", i);
      fileList->topline(i);
      fileList->select(i);
      break;
    }
}


//
// 'quote_pathname()' - Quote a pathname for a menu.
//

static void
quote_pathname(char       *dst,		// O - Destination string
               const char *src,		// I - Source string
	       int        dstsize)	// I - Size of destination string
{
  dstsize --;

  while (*src && dstsize > 1) {
    if (*src == '\\') {
      // Convert backslash to forward slash...
      *dst++ = '\\';
      *dst++ = '/';
      src ++;
    } else {
      if (*src == '/') *dst++ = '\\';

      *dst++ = *src++;
    }
  }

  *dst = '\0';
}


//
// 'unquote_pathname()' - Unquote a pathname from a menu.
//

static void
unquote_pathname(char       *dst,	// O - Destination string
                 const char *src,	// I - Source string
	         int        dstsize)	// I - Size of destination string
{
  dstsize --;

  while (*src && dstsize > 1) {
    if (*src == '\\') src ++;
    *dst++ = *src++;
  }

  *dst = '\0';
}


//
// End of "$Id: Fl_File_Chooser2.cxx,v 1.1.1.1 2003/06/03 22:25:42 agno Exp $".
//