gtkctree.c

gtk是linux一款强大的夸平台的图形化开发工具

  widget_class->drag_begin = gtk_ctree_drag_begin;
  widget_class->drag_motion = gtk_ctree_drag_motion;
  widget_class->drag_data_received = gtk_ctree_drag_data_received;

  clist_class->select_row = real_select_row;
  clist_class->unselect_row = real_unselect_row;
  clist_class->row_move = real_row_move;
  clist_class->undo_selection = real_undo_selection;
  clist_class->resync_selection = resync_selection;
  clist_class->selection_find = selection_find;
  clist_class->click_column = NULL;
  clist_class->draw_row = draw_row;
  clist_class->draw_drag_highlight = draw_drag_highlight;
  clist_class->clear = real_clear;
  clist_class->select_all = real_select_all;
  clist_class->unselect_all = real_unselect_all;
  clist_class->fake_unselect_all = fake_unselect_all;
  clist_class->insert_row = real_insert_row;
  clist_class->remove_row = real_remove_row;
  clist_class->sort_list = real_sort_list;
  clist_class->set_cell_contents = set_cell_contents;
  clist_class->cell_size_request = cell_size_request;

  klass->tree_select_row = real_tree_select;
  klass->tree_unselect_row = real_tree_unselect;
  klass->tree_expand = real_tree_expand;
  klass->tree_collapse = real_tree_collapse;
  klass->tree_move = real_tree_move;
  klass->change_focus_row_expansion = change_focus_row_expansion;

  binding_set = gtk_binding_set_by_class (klass);
  gtk_binding_entry_add_signal (binding_set,
				'+', GDK_SHIFT_MASK,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM, GTK_CTREE_EXPANSION_EXPAND);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Add, 0,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM, GTK_CTREE_EXPANSION_EXPAND);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Add, GDK_CONTROL_MASK,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM,
				GTK_CTREE_EXPANSION_EXPAND_RECURSIVE);
  gtk_binding_entry_add_signal (binding_set,
				'-', 0,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM, GTK_CTREE_EXPANSION_COLLAPSE);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Subtract, 0,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM, GTK_CTREE_EXPANSION_COLLAPSE);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Subtract, GDK_CONTROL_MASK,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM,
				GTK_CTREE_EXPANSION_COLLAPSE_RECURSIVE);
  gtk_binding_entry_add_signal (binding_set,
				'=', 0,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM, GTK_CTREE_EXPANSION_TOGGLE);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Multiply, 0,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM, GTK_CTREE_EXPANSION_TOGGLE);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Multiply, GDK_CONTROL_MASK,
				"change_focus_row_expansion", 1,
				GTK_TYPE_ENUM,
				GTK_CTREE_EXPANSION_TOGGLE_RECURSIVE);
}

static void
gtk_ctree_set_arg (GtkObject      *object,
		   GtkArg         *arg,
		   guint           arg_id)
{
  GtkCTree *ctree;

  ctree = GTK_CTREE (object);

  switch (arg_id)
    {
    case ARG_N_COLUMNS: /* construct-only arg, only set when !GTK_CONSTRUCTED */
      if (ctree->tree_column)
	gtk_ctree_construct (ctree,
			     MAX (1, GTK_VALUE_UINT (*arg)),
			     ctree->tree_column, NULL);
      else
	GTK_CLIST (ctree)->columns = MAX (1, GTK_VALUE_UINT (*arg));
      break;
    case ARG_TREE_COLUMN: /* construct-only arg, only set when !GTK_CONSTRUCTED */
      if (GTK_CLIST (ctree)->columns)
	gtk_ctree_construct (ctree,
			     GTK_CLIST (ctree)->columns,
			     MAX (1, GTK_VALUE_UINT (*arg)),
			     NULL);
      else
	ctree->tree_column = MAX (1, GTK_VALUE_UINT (*arg));
      break;
    case ARG_INDENT:
      gtk_ctree_set_indent (ctree, GTK_VALUE_UINT (*arg));
      break;
    case ARG_SPACING:
      gtk_ctree_set_spacing (ctree, GTK_VALUE_UINT (*arg));
      break;
    case ARG_SHOW_STUB:
      gtk_ctree_set_show_stub (ctree, GTK_VALUE_BOOL (*arg));
      break;
    case ARG_LINE_STYLE:
      gtk_ctree_set_line_style (ctree, GTK_VALUE_ENUM (*arg));
      break;
    case ARG_EXPANDER_STYLE:
      gtk_ctree_set_expander_style (ctree, GTK_VALUE_ENUM (*arg));
      break;
    default:
      break;
    }
}

static void
gtk_ctree_get_arg (GtkObject      *object,
		   GtkArg         *arg,
		   guint           arg_id)
{
  GtkCTree *ctree;

  ctree = GTK_CTREE (object);

  switch (arg_id)
    {
    case ARG_N_COLUMNS:
      GTK_VALUE_UINT (*arg) = GTK_CLIST (ctree)->columns;
      break;
    case ARG_TREE_COLUMN:
      GTK_VALUE_UINT (*arg) = ctree->tree_column;
      break;
    case ARG_INDENT:
      GTK_VALUE_UINT (*arg) = ctree->tree_indent;
      break;
    case ARG_SPACING:
      GTK_VALUE_UINT (*arg) = ctree->tree_spacing;
      break;
    case ARG_SHOW_STUB:
      GTK_VALUE_BOOL (*arg) = ctree->show_stub;
      break;
    case ARG_LINE_STYLE:
      GTK_VALUE_ENUM (*arg) = ctree->line_style;
      break;
    case ARG_EXPANDER_STYLE:
      GTK_VALUE_ENUM (*arg) = ctree->expander_style;
      break;
    default:
      arg->type = GTK_TYPE_INVALID;
      break;
    }
}

static void
gtk_ctree_init (GtkCTree *ctree)
{
  GtkCList *clist;

  GTK_CLIST_SET_FLAG (ctree, CLIST_DRAW_DRAG_RECT);
  GTK_CLIST_SET_FLAG (ctree, CLIST_DRAW_DRAG_LINE);

  clist = GTK_CLIST (ctree);

  ctree->tree_indent    = 20;
  ctree->tree_spacing   = 5;
  ctree->tree_column    = 0;
  ctree->line_style     = GTK_CTREE_LINES_SOLID;
  ctree->expander_style = GTK_CTREE_EXPANDER_SQUARE;
  ctree->drag_compare   = NULL;
  ctree->show_stub      = TRUE;

  clist->button_actions[0] |= GTK_BUTTON_EXPANDS;
}

static void
ctree_attach_styles (GtkCTree     *ctree,
		     GtkCTreeNode *node,
		     gpointer      data)
{
  GtkCList *clist;
  gint i;

  clist = GTK_CLIST (ctree);

  if (GTK_CTREE_ROW (node)->row.style)
    GTK_CTREE_ROW (node)->row.style =
      gtk_style_attach (GTK_CTREE_ROW (node)->row.style, clist->clist_window);

  if (GTK_CTREE_ROW (node)->row.fg_set || GTK_CTREE_ROW (node)->row.bg_set)
    {
      GdkColormap *colormap;

      colormap = gtk_widget_get_colormap (GTK_WIDGET (ctree));
      if (GTK_CTREE_ROW (node)->row.fg_set)
	gdk_color_alloc (colormap, &(GTK_CTREE_ROW (node)->row.foreground));
      if (GTK_CTREE_ROW (node)->row.bg_set)
	gdk_color_alloc (colormap, &(GTK_CTREE_ROW (node)->row.background));
    }

  for (i = 0; i < clist->columns; i++)
    if  (GTK_CTREE_ROW (node)->row.cell[i].style)
      GTK_CTREE_ROW (node)->row.cell[i].style =
	gtk_style_attach (GTK_CTREE_ROW (node)->row.cell[i].style,
			  clist->clist_window);
}

static void
ctree_detach_styles (GtkCTree     *ctree,
		     GtkCTreeNode *node,
		     gpointer      data)
{
  GtkCList *clist;
  gint i;

  clist = GTK_CLIST (ctree);

  if (GTK_CTREE_ROW (node)->row.style)
    gtk_style_detach (GTK_CTREE_ROW (node)->row.style);
  for (i = 0; i < clist->columns; i++)
    if  (GTK_CTREE_ROW (node)->row.cell[i].style)
      gtk_style_detach (GTK_CTREE_ROW (node)->row.cell[i].style);
}

static void
gtk_ctree_realize (GtkWidget *widget)
{
  GtkCTree *ctree;
  GtkCList *clist;
  GdkGCValues values;
  GtkCTreeNode *node;
  GtkCTreeNode *child;
  gint i;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_CTREE (widget));

  GTK_WIDGET_CLASS (parent_class)->realize (widget);

  ctree = GTK_CTREE (widget);
  clist = GTK_CLIST (widget);

  node = GTK_CTREE_NODE (clist->row_list);
  for (i = 0; i < clist->rows; i++)
    {
      if (GTK_CTREE_ROW (node)->children && !GTK_CTREE_ROW (node)->expanded)
	for (child = GTK_CTREE_ROW (node)->children; child;
	     child = GTK_CTREE_ROW (child)->sibling)
	  gtk_ctree_pre_recursive (ctree, child, ctree_attach_styles, NULL);
      node = GTK_CTREE_NODE_NEXT (node);
    }

  values.foreground = widget->style->fg[GTK_STATE_NORMAL];
  values.background = widget->style->base[GTK_STATE_NORMAL];
  values.subwindow_mode = GDK_INCLUDE_INFERIORS;
  values.line_style = GDK_LINE_SOLID;
  ctree->lines_gc = gdk_gc_new_with_values (GTK_CLIST(widget)->clist_window, 
					    &values,
					    GDK_GC_FOREGROUND |
					    GDK_GC_BACKGROUND |
					    GDK_GC_SUBWINDOW |
					    GDK_GC_LINE_STYLE);

  if (ctree->line_style == GTK_CTREE_LINES_DOTTED)
    {
      gdk_gc_set_line_attributes (ctree->lines_gc, 1, 
				  GDK_LINE_ON_OFF_DASH, None, None);
      gdk_gc_set_dashes (ctree->lines_gc, 0, "\1\1", 2);
    }
}

static void
gtk_ctree_unrealize (GtkWidget *widget)
{
  GtkCTree *ctree;
  GtkCList *clist;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_CTREE (widget));

  GTK_WIDGET_CLASS (parent_class)->unrealize (widget);

  ctree = GTK_CTREE (widget);
  clist = GTK_CLIST (widget);

  if (GTK_WIDGET_REALIZED (widget))
    {
      GtkCTreeNode *node;
      GtkCTreeNode *child;
      gint i;

      node = GTK_CTREE_NODE (clist->row_list);
      for (i = 0; i < clist->rows; i++)
	{
	  if (GTK_CTREE_ROW (node)->children &&
	      !GTK_CTREE_ROW (node)->expanded)
	    for (child = GTK_CTREE_ROW (node)->children; child;
		 child = GTK_CTREE_ROW (child)->sibling)
	      gtk_ctree_pre_recursive(ctree, child, ctree_detach_styles, NULL);
	  node = GTK_CTREE_NODE_NEXT (node);
	}
    }

  gdk_gc_destroy (ctree->lines_gc);
}

static gint
gtk_ctree_button_press (GtkWidget      *widget,
			GdkEventButton *event)
{
  GtkCTree *ctree;
  GtkCList *clist;
  gint button_actions;

  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_CTREE (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);

  ctree = GTK_CTREE (widget);
  clist = GTK_CLIST (widget);

  button_actions = clist->button_actions[event->button - 1];

  if (button_actions == GTK_BUTTON_IGNORED)
    return FALSE;

  if (event->window == clist->clist_window)
    {
      GtkCTreeNode *work;
      gint x;
      gint y;
      gint row;
      gint column;

      x = event->x;
      y = event->y;

      if (!gtk_clist_get_selection_info (clist, x, y, &row, &column))
	return FALSE;

      work = GTK_CTREE_NODE (g_list_nth (clist->row_list, row));
	  
      if (button_actions & GTK_BUTTON_EXPANDS &&
	  (GTK_CTREE_ROW (work)->children && !GTK_CTREE_ROW (work)->is_leaf  &&
	   (event->type == GDK_2BUTTON_PRESS ||
	    ctree_is_hot_spot (ctree, work, row, x, y))))
	{
	  if (GTK_CTREE_ROW (work)->expanded)
	    gtk_ctree_collapse (ctree, work);
	  else
	    gtk_ctree_expand (ctree, work);

	  return FALSE;
	}
    }
  return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, event);
}

static void
draw_drag_highlight (GtkCList        *clist,
		     GtkCListRow     *dest_row,
		     gint             dest_row_number,
		     GtkCListDragPos  drag_pos)
{
  GtkCTree *ctree;
  GdkPoint points[4];
  gint level;
  gint i;
  gint y = 0;

  g_return_if_fail (clist != NULL);
  g_return_if_fail (GTK_IS_CTREE (clist));

  ctree = GTK_CTREE (clist);

  level = ((GtkCTreeRow *)(dest_row))->level;

  y = ROW_TOP_YPIXEL (clist, dest_row_number) - 1;

  switch (drag_pos)
    {
    case GTK_CLIST_DRAG_NONE:
      break;
    case GTK_CLIST_DRAG_AFTER:
      y += clist->row_height + 1;
    case GTK_CLIST_DRAG_BEFORE:
      
      if (clist->column[ctree->tree_column].visible)
	switch (clist->column[ctree->tree_column].justification)
	  {
	  case GTK_JUSTIFY_CENTER:
	  case GTK_JUSTIFY_FILL:
	  case GTK_JUSTIFY_LEFT:
	    if (ctree->tree_column > 0)
	      gdk_draw_line (clist->clist_window, clist->xor_gc, 
			     COLUMN_LEFT_XPIXEL(clist, 0), y,
			     COLUMN_LEFT_XPIXEL(clist, ctree->tree_column - 1)+
			     clist->column[ctree->tree_column - 1].area.width,
			     y);

	    gdk_draw_line (clist->clist_window, clist->xor_gc, 
			   COLUMN_LEFT_XPIXEL(clist, ctree->tree_column) + 
			   ctree->tree_indent * level -
			   (ctree->tree_indent - PM_SIZE) / 2, y,
			   GTK_WIDGET (ctree)->allocation.width, y);
	    break;
	  case GTK_JUSTIFY_RIGHT:
	    if (ctree->tree_column < clist->columns - 1)
	      gdk_draw_line (clist->clist_window, clist->xor_gc, 
			     COLUMN_LEFT_XPIXEL(clist, ctree->tree_column + 1),
			     y,
			     COLUMN_LEFT_XPIXEL(clist, clist->columns - 1) +
			     clist->column[clist->columns - 1].area.width, y);
      
	    gdk_draw_line (clist->clist_window, clist->xor_gc, 
			   0, y, COLUMN_LEFT_XPIXEL(clist, ctree->tree_column)
			   + clist->column[ctree->tree_column].area.width -
			   ctree->tree_indent * level +
			   (ctree->tree_indent - PM_SIZE) / 2, y);
	    break;
	  }
      else
	gdk_draw_line (clist->clist_window, clist->xor_gc, 
		       0, y, clist->clist_window_width, y);
      break;
    case GTK_CLIST_DRAG_INTO:
      y = ROW_TOP_YPIXEL (clist, dest_row_number) + clist->row_height;

      if (clist->column[ctree->tree_column].visible)
	switch (clist->column[ctree->tree_column].justification)
	  {
	  case GTK_JUSTIFY_CENTER:
	  case GTK_JUSTIFY_FILL:
	  case GTK_JUSTIFY_LEFT:
	    points[0].x =  COLUMN_LEFT_XPIXEL(clist, ctree->tree_column) + 
	      ctree->tree_indent * level - (ctree->tree_indent - PM_SIZE) / 2;