gtkclist.c

gtk是linux一款强大的夸平台的图形化开发工具

  if (clist->column[column].area.width < clist->column[column].min_width)
    gtk_clist_set_column_width (clist, column,clist->column[column].min_width);
}

void
gtk_clist_set_column_max_width (GtkCList *clist,
				gint      column,
				gint      max_width)
{
  g_return_if_fail (clist != NULL);
  g_return_if_fail (GTK_IS_CLIST (clist));

  if (column < 0 || column >= clist->columns)
    return;
  if (clist->column[column].max_width == max_width)
    return;

  if (clist->column[column].min_width >= 0 && max_width >= 0 &&
      clist->column[column].min_width > max_width)
    clist->column[column].max_width = clist->column[column].min_width;
  else
    clist->column[column].max_width = max_width;
  
  if (clist->column[column].area.width > clist->column[column].max_width)
    gtk_clist_set_column_width (clist, column,clist->column[column].max_width);
}

/* PRIVATE COLUMN FUNCTIONS
 *   column_auto_resize
 *   real_resize_column
 *   abort_column_resize
 *   size_allocate_title_buttons
 *   size_allocate_columns
 *   list_requisition_width
 *   new_column_width
 *   column_button_create
 *   column_button_clicked
 *   column_title_passive_func
 */
static void
column_auto_resize (GtkCList    *clist,
		    GtkCListRow *clist_row,
		    gint         column,
		    gint         old_width)
{
  /* resize column if needed for auto_resize */
  GtkRequisition requisition;

  if (!clist->column[column].auto_resize ||
      GTK_CLIST_AUTO_RESIZE_BLOCKED(clist))
    return;

  if (clist_row)
    GTK_CLIST_CLASS_FW (clist)->cell_size_request (clist, clist_row,
						   column, &requisition);
  else
    requisition.width = 0;

  if (requisition.width > clist->column[column].width)
    gtk_clist_set_column_width (clist, column, requisition.width);
  else if (requisition.width < old_width &&
	   old_width == clist->column[column].width)
    {
      GList *list;
      gint new_width = 0;

      /* run a "gtk_clist_optimal_column_width" but break, if
       * the column doesn't shrink */
      if (GTK_CLIST_SHOW_TITLES(clist) && clist->column[column].button)
	new_width = (clist->column[column].button->requisition.width -
		     (CELL_SPACING + (2 * COLUMN_INSET)));
      else
	new_width = 0;

      for (list = clist->row_list; list; list = list->next)
	{
	  GTK_CLIST_CLASS_FW (clist)->cell_size_request
	    (clist, GTK_CLIST_ROW (list), column, &requisition);
	  new_width = MAX (new_width, requisition.width);
	  if (new_width == clist->column[column].width)
	    break;
	}
      if (new_width < clist->column[column].width)
	gtk_clist_set_column_width
	  (clist, column, MAX (new_width, clist->column[column].min_width));
    }
}

static void
real_resize_column (GtkCList *clist,
		    gint      column,
		    gint      width)
{
  g_return_if_fail (clist != NULL);
  g_return_if_fail (GTK_IS_CLIST (clist));

  if (column < 0 || column >= clist->columns)
    return;
  
  if (width < MAX (COLUMN_MIN_WIDTH, clist->column[column].min_width))
    width = MAX (COLUMN_MIN_WIDTH, clist->column[column].min_width);
  if (clist->column[column].max_width >= 0 &&
      width > clist->column[column].max_width)
    width = clist->column[column].max_width;

  clist->column[column].width = width;
  clist->column[column].width_set = TRUE;

  /* FIXME: this is quite expensive to do if the widget hasn't
   *        been size_allocated yet, and pointless. Should
   *        a flag be kept
   */
  size_allocate_columns (clist, TRUE);
  size_allocate_title_buttons (clist);

  CLIST_REFRESH (clist);
}

static void
abort_column_resize (GtkCList *clist)
{
  g_return_if_fail (clist != NULL);
  g_return_if_fail (GTK_IS_CLIST (clist));

  if (!GTK_CLIST_IN_DRAG(clist))
    return;

  GTK_CLIST_UNSET_FLAG (clist, CLIST_IN_DRAG);
  gtk_grab_remove (GTK_WIDGET (clist));
  gdk_pointer_ungrab (GDK_CURRENT_TIME);
  clist->drag_pos = -1;

  if (clist->x_drag >= 0 && clist->x_drag <= clist->clist_window_width - 1)
    draw_xor_line (clist);

  if (GTK_CLIST_ADD_MODE(clist))
    {
      gdk_gc_set_line_attributes (clist->xor_gc, 1, GDK_LINE_ON_OFF_DASH, 0,0);
      gdk_gc_set_dashes (clist->xor_gc, 0, "\4\4", 2);
    }
}

static void
size_allocate_title_buttons (GtkCList *clist)
{
  GtkAllocation button_allocation;
  gint last_column;
  gint last_button = 0;
  gint i;

  if (!GTK_WIDGET_REALIZED (clist))
    return;

  button_allocation.x = clist->hoffset;
  button_allocation.y = 0;
  button_allocation.width = 0;
  button_allocation.height = clist->column_title_area.height;

  /* find last visible column */
  for (last_column = clist->columns - 1; last_column >= 0; last_column--)
    if (clist->column[last_column].visible)
      break;

  for (i = 0; i < last_column; i++)
    {
      if (!clist->column[i].visible)
	{
	  last_button = i + 1;
	  gdk_window_hide (clist->column[i].window);
	  continue;
	}

      button_allocation.width += (clist->column[i].area.width +
				  CELL_SPACING + 2 * COLUMN_INSET);

      if (!clist->column[i + 1].button)
	{
	  gdk_window_hide (clist->column[i].window);
	  continue;
	}

      gtk_widget_size_allocate (clist->column[last_button].button,
				&button_allocation);
      button_allocation.x += button_allocation.width;
      button_allocation.width = 0;

      if (clist->column[last_button].resizeable)
	{
	  gdk_window_show (clist->column[last_button].window);
	  gdk_window_move_resize (clist->column[last_button].window,
				  button_allocation.x - (DRAG_WIDTH / 2), 
				  0, DRAG_WIDTH,
				  clist->column_title_area.height);
	}
      else
	gdk_window_hide (clist->column[last_button].window);

      last_button = i + 1;
    }

  button_allocation.width += (clist->column[last_column].area.width +
			      2 * (CELL_SPACING + COLUMN_INSET));
  gtk_widget_size_allocate (clist->column[last_button].button,
			    &button_allocation);

  if (clist->column[last_button].resizeable)
    {
      button_allocation.x += button_allocation.width;

      gdk_window_show (clist->column[last_button].window);
      gdk_window_move_resize (clist->column[last_button].window,
			      button_allocation.x - (DRAG_WIDTH / 2), 
			      0, DRAG_WIDTH, clist->column_title_area.height);
    }
  else
    gdk_window_hide (clist->column[last_button].window);
}

static void
size_allocate_columns (GtkCList *clist,
		       gboolean  block_resize)
{
  gint xoffset = CELL_SPACING + COLUMN_INSET;
  gint last_column;
  gint i;

  /* find last visible column and calculate correct column width */
  for (last_column = clist->columns - 1;
       last_column >= 0 && !clist->column[last_column].visible; last_column--);

  if (last_column < 0)
    return;

  for (i = 0; i <= last_column; i++)
    {
      if (!clist->column[i].visible)
	continue;
      clist->column[i].area.x = xoffset;
      if (clist->column[i].width_set)
	{
	  if (!block_resize && GTK_CLIST_SHOW_TITLES(clist) &&
	      clist->column[i].auto_resize && clist->column[i].button)
	    {
	      gint width;

	      width = (clist->column[i].button->requisition.width -
		       (CELL_SPACING + (2 * COLUMN_INSET)));

	      if (width > clist->column[i].width)
		gtk_clist_set_column_width (clist, i, width);
	    }

	  clist->column[i].area.width = clist->column[i].width;
	  xoffset += clist->column[i].width + CELL_SPACING + (2* COLUMN_INSET);
	}
      else if (GTK_CLIST_SHOW_TITLES(clist) && clist->column[i].button)
	{
	  clist->column[i].area.width =
	    clist->column[i].button->requisition.width -
	    (CELL_SPACING + (2 * COLUMN_INSET));
	  xoffset += clist->column[i].button->requisition.width;
	}
    }

  clist->column[last_column].area.width = clist->column[last_column].area.width
    + MAX (0, clist->clist_window_width + COLUMN_INSET - xoffset);
}

static gint
list_requisition_width (GtkCList *clist) 
{
  gint width = CELL_SPACING;
  gint i;

  for (i = clist->columns - 1; i >= 0; i--)
    {
      if (!clist->column[i].visible)
	continue;

      if (clist->column[i].width_set)
	width += clist->column[i].width + CELL_SPACING + (2 * COLUMN_INSET);
      else if (GTK_CLIST_SHOW_TITLES(clist) && clist->column[i].button)
	width += clist->column[i].button->requisition.width;
    }

  return width;
}

/* this function returns the new width of the column being resized given
 * the column and x position of the cursor; the x cursor position is passed
 * in as a pointer and automagicly corrected if it's beyond min/max limits */
static gint
new_column_width (GtkCList *clist,
		  gint      column,
		  gint     *x)
{
  gint xthickness = GTK_WIDGET (clist)->style->klass->xthickness;
  gint width;
  gint cx;
  gint dx;
  gint last_column;

  /* first translate the x position from widget->window
   * to clist->clist_window */
  cx = *x - xthickness;

  for (last_column = clist->columns - 1;
       last_column >= 0 && !clist->column[last_column].visible; last_column--);

  /* calculate new column width making sure it doesn't end up
   * less than the minimum width */
  dx = (COLUMN_LEFT_XPIXEL (clist, column) + COLUMN_INSET +
	(column < last_column) * CELL_SPACING);
  width = cx - dx;

  if (width < MAX (COLUMN_MIN_WIDTH, clist->column[column].min_width))
    {
      width = MAX (COLUMN_MIN_WIDTH, clist->column[column].min_width);
      cx = dx + width;
      *x = cx + xthickness;
    }
  else if (clist->column[column].max_width >= COLUMN_MIN_WIDTH &&
	   width > clist->column[column].max_width)
    {
      width = clist->column[column].max_width;
      cx = dx + clist->column[column].max_width;
      *x = cx + xthickness;
    }      

  if (cx < 0 || cx > clist->clist_window_width)
    *x = -1;

  return width;
}

static void
column_button_create (GtkCList *clist,
		      gint      column)
{
  GtkWidget *button;

  gtk_widget_push_composite_child ();
  button = clist->column[column].button = gtk_button_new ();
  gtk_widget_pop_composite_child ();

  if (GTK_WIDGET_REALIZED (clist) && clist->title_window)
    gtk_widget_set_parent_window (clist->column[column].button,
				  clist->title_window);
  gtk_widget_set_parent (button, GTK_WIDGET (clist));

  gtk_signal_connect (GTK_OBJECT (button), "clicked",
		      (GtkSignalFunc) column_button_clicked,
		      (gpointer) clist);
  gtk_widget_show (button);
}

static void
column_button_clicked (GtkWidget *widget,
		       gpointer   data)
{
  gint i;
  GtkCList *clist;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_CLIST (data));

  clist = GTK_CLIST (data);

  /* find the column who's button was pressed */
  for (i = 0; i < clist->columns; i++)
    if (clist->column[i].button == widget)
      break;

  gtk_signal_emit (GTK_OBJECT (clist), clist_signals[CLICK_COLUMN], i);
}

static gint
column_title_passive_func (GtkWidget *widget, 
			   GdkEvent  *event,
			   gpointer   data)
{
  g_return_val_if_fail (event != NULL, FALSE);
  
  switch (event->type)
    {
    case GDK_MOTION_NOTIFY:
    case GDK_BUTTON_PRESS:
    case GDK_2BUTTON_PRESS:
    case GDK_3BUTTON_PRESS:
    case GDK_BUTTON_RELEASE:
    case GDK_ENTER_NOTIFY:
    case GDK_LEAVE_NOTIFY:
      return TRUE;
    default:
      break;
    }
  return FALSE;
}


/* PUBLIC CELL FUNCTIONS
 *   gtk_clist_get_cell_type
 *   gtk_clist_set_text
 *   gtk_clist_get_text
 *   gtk_clist_set_pixmap
 *   gtk_clist_get_pixmap
 *   gtk_clist_set_pixtext
 *   gtk_clist_get_pixtext
 *   gtk_clist_set_shift
 */
GtkCellType 
gtk_clist_get_cell_type (GtkCList *clist,
			 gint      row,
			 gint      column)
{
  GtkCListRow *clist_row;

  g_return_val_if_fail (clist != NULL, -1);
  g_return_val_if_fail (GTK_IS_CLIST (clist), -1);

  if (row < 0 || row >= clist->rows)
    return -1;
  if (column < 0 || column >= clist->columns)
    return -1;

  clist_row = (g_list_nth (clist->row_list, row))->data;

  return clist_row->cell[column].type;
}

void
gtk_clist_set_text (GtkCList    *clist,
		    gint         row,
		    gint         column,
		    const gchar *text)