gtktable.c

gtk是linux一款强大的夸平台的图形化开发工具

  g_return_if_fail (top_attach < bottom_attach);
  
  if (right_attach >= table->ncols)
    gtk_table_resize (table, table->nrows, right_attach);
  
  if (bottom_attach >= table->nrows)
    gtk_table_resize (table, bottom_attach, table->ncols);
  
  table_child = g_new (GtkTableChild, 1);
  table_child->widget = child;
  table_child->left_attach = left_attach;
  table_child->right_attach = right_attach;
  table_child->top_attach = top_attach;
  table_child->bottom_attach = bottom_attach;
  table_child->xexpand = (xoptions & GTK_EXPAND) != 0;
  table_child->xshrink = (xoptions & GTK_SHRINK) != 0;
  table_child->xfill = (xoptions & GTK_FILL) != 0;
  table_child->xpadding = xpadding;
  table_child->yexpand = (yoptions & GTK_EXPAND) != 0;
  table_child->yshrink = (yoptions & GTK_SHRINK) != 0;
  table_child->yfill = (yoptions & GTK_FILL) != 0;
  table_child->ypadding = ypadding;
  
  table->children = g_list_prepend (table->children, table_child);
  
  gtk_widget_set_parent (child, GTK_WIDGET (table));
  
  if (GTK_WIDGET_REALIZED (child->parent))
    gtk_widget_realize (child);

  if (GTK_WIDGET_VISIBLE (child->parent) && GTK_WIDGET_VISIBLE (child))
    {
      if (GTK_WIDGET_MAPPED (child->parent))
	gtk_widget_map (child);

      gtk_widget_queue_resize (child);
    }
}

void
gtk_table_attach_defaults (GtkTable  *table,
			   GtkWidget *widget,
			   guint      left_attach,
			   guint      right_attach,
			   guint      top_attach,
			   guint      bottom_attach)
{
  gtk_table_attach (table, widget,
		    left_attach, right_attach,
		    top_attach, bottom_attach,
		    GTK_EXPAND | GTK_FILL,
		    GTK_EXPAND | GTK_FILL,
		    0, 0);
}

void
gtk_table_set_row_spacing (GtkTable *table,
			   guint     row,
			   guint     spacing)
{
  g_return_if_fail (table != NULL);
  g_return_if_fail (GTK_IS_TABLE (table));
  g_return_if_fail (row + 1 < table->nrows);
  
  if (table->rows[row].spacing != spacing)
    {
      table->rows[row].spacing = spacing;
      
      if (GTK_WIDGET_VISIBLE (table))
	gtk_widget_queue_resize (GTK_WIDGET (table));
    }
}

void
gtk_table_set_col_spacing (GtkTable *table,
			   guint     column,
			   guint     spacing)
{
  g_return_if_fail (table != NULL);
  g_return_if_fail (GTK_IS_TABLE (table));
  g_return_if_fail (column + 1 < table->ncols);
  
  if (table->cols[column].spacing != spacing)
    {
      table->cols[column].spacing = spacing;
      
      if (GTK_WIDGET_VISIBLE (table))
	gtk_widget_queue_resize (GTK_WIDGET (table));
    }
}

void
gtk_table_set_row_spacings (GtkTable *table,
			    guint     spacing)
{
  guint row;
  
  g_return_if_fail (table != NULL);
  g_return_if_fail (GTK_IS_TABLE (table));
  
  table->row_spacing = spacing;
  for (row = 0; row + 1 < table->nrows; row++)
    table->rows[row].spacing = spacing;
  
  if (GTK_WIDGET_VISIBLE (table))
    gtk_widget_queue_resize (GTK_WIDGET (table));
}

void
gtk_table_set_col_spacings (GtkTable *table,
			    guint     spacing)
{
  guint col;
  
  g_return_if_fail (table != NULL);
  g_return_if_fail (GTK_IS_TABLE (table));
  
  table->column_spacing = spacing;
  for (col = 0; col + 1 < table->ncols; col++)
    table->cols[col].spacing = spacing;
  
  if (GTK_WIDGET_VISIBLE (table))
    gtk_widget_queue_resize (GTK_WIDGET (table));
}

void
gtk_table_set_homogeneous (GtkTable *table,
			   gboolean  homogeneous)
{
  g_return_if_fail (table != NULL);
  g_return_if_fail (GTK_IS_TABLE (table));

  homogeneous = (homogeneous != 0);
  if (homogeneous != table->homogeneous)
    {
      table->homogeneous = homogeneous;
      
      if (GTK_WIDGET_VISIBLE (table))
	gtk_widget_queue_resize (GTK_WIDGET (table));
    }
}

static void
gtk_table_finalize (GtkObject *object)
{
  GtkTable *table;
  
  g_return_if_fail (object != NULL);
  g_return_if_fail (GTK_IS_TABLE (object));
  
  table = GTK_TABLE (object);
  
  g_free (table->rows);
  g_free (table->cols);
  
  (* GTK_OBJECT_CLASS (parent_class)->finalize) (object);
}

static void
gtk_table_map (GtkWidget *widget)
{
  GtkTable *table;
  GtkTableChild *child;
  GList *children;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TABLE (widget));
  
  table = GTK_TABLE (widget);
  GTK_WIDGET_SET_FLAGS (table, GTK_MAPPED);
  
  children = table->children;
  while (children)
    {
      child = children->data;
      children = children->next;
      
      if (GTK_WIDGET_VISIBLE (child->widget) &&
	  !GTK_WIDGET_MAPPED (child->widget))
	gtk_widget_map (child->widget);
    }
}

static void
gtk_table_unmap (GtkWidget *widget)
{
  GtkTable *table;
  GtkTableChild *child;
  GList *children;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TABLE (widget));
  
  table = GTK_TABLE (widget);
  GTK_WIDGET_UNSET_FLAGS (table, GTK_MAPPED);
  
  children = table->children;
  while (children)
    {
      child = children->data;
      children = children->next;
      
      if (GTK_WIDGET_VISIBLE (child->widget) &&
	  GTK_WIDGET_MAPPED (child->widget))
	gtk_widget_unmap (child->widget);
    }
}

static void
gtk_table_draw (GtkWidget    *widget,
		GdkRectangle *area)
{
  GtkTable *table;
  GtkTableChild *child;
  GList *children;
  GdkRectangle child_area;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TABLE (widget));
  
  if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
    {
      table = GTK_TABLE (widget);
      
      children = table->children;
      while (children)
	{
	  child = children->data;
	  children = children->next;
	  
	  if (gtk_widget_intersect (child->widget, area, &child_area))
	    gtk_widget_draw (child->widget, &child_area);
	}
    }
}

static gint
gtk_table_expose (GtkWidget	 *widget,
		  GdkEventExpose *event)
{
  GtkTable *table;
  GtkTableChild *child;
  GList *children;
  GdkEventExpose child_event;
  
  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_TABLE (widget), FALSE);
  
  if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
    {
      table = GTK_TABLE (widget);
      
      child_event = *event;
      
      children = table->children;
      while (children)
	{
	  child = children->data;
	  children = children->next;
	  
	  if (GTK_WIDGET_NO_WINDOW (child->widget) &&
	      gtk_widget_intersect (child->widget, &event->area, &child_event.area))
	    gtk_widget_event (child->widget, (GdkEvent*) &child_event);
	}
    }
  
  return FALSE;
}

static void
gtk_table_size_request (GtkWidget      *widget,
			GtkRequisition *requisition)
{
  GtkTable *table;
  gint row, col;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TABLE (widget));
  g_return_if_fail (requisition != NULL);
  
  table = GTK_TABLE (widget);
  
  requisition->width = 0;
  requisition->height = 0;
  
  gtk_table_size_request_init (table);
  gtk_table_size_request_pass1 (table);
  gtk_table_size_request_pass2 (table);
  gtk_table_size_request_pass3 (table);
  gtk_table_size_request_pass2 (table);
  
  for (col = 0; col < table->ncols; col++)
    requisition->width += table->cols[col].requisition;
  for (col = 0; col + 1 < table->ncols; col++)
    requisition->width += table->cols[col].spacing;
  
  for (row = 0; row < table->nrows; row++)
    requisition->height += table->rows[row].requisition;
  for (row = 0; row + 1 < table->nrows; row++)
    requisition->height += table->rows[row].spacing;
  
  requisition->width += GTK_CONTAINER (table)->border_width * 2;
  requisition->height += GTK_CONTAINER (table)->border_width * 2;
}

static void
gtk_table_size_allocate (GtkWidget     *widget,
			 GtkAllocation *allocation)
{
  GtkTable *table;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TABLE (widget));
  g_return_if_fail (allocation != NULL);
  
  widget->allocation = *allocation;
  table = GTK_TABLE (widget);
  
  gtk_table_size_allocate_init (table);
  gtk_table_size_allocate_pass1 (table);
  gtk_table_size_allocate_pass2 (table);
}

static void
gtk_table_add (GtkContainer *container,
	       GtkWidget    *widget)
{
  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TABLE (container));
  g_return_if_fail (widget != NULL);
  
  gtk_table_attach_defaults (GTK_TABLE (container), widget, 0, 1, 0, 1);
}

static void
gtk_table_remove (GtkContainer *container,
		  GtkWidget    *widget)
{
  GtkTable *table;
  GtkTableChild *child;
  GList *children;
  
  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TABLE (container));
  g_return_if_fail (widget != NULL);
  
  table = GTK_TABLE (container);
  children = table->children;
  
  while (children)
    {
      child = children->data;
      children = children->next;
      
      if (child->widget == widget)
	{
	  gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
	  
	  gtk_widget_unparent (widget);
	  
	  table->children = g_list_remove (table->children, child);
	  g_free (child);
	  
	  if (was_visible && GTK_WIDGET_VISIBLE (container))
	    gtk_widget_queue_resize (GTK_WIDGET (container));
	  break;
	}
    }
}

static void
gtk_table_forall (GtkContainer *container,
		  gboolean	include_internals,
		  GtkCallback	callback,
		  gpointer	callback_data)
{
  GtkTable *table;
  GtkTableChild *child;
  GList *children;
  
  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TABLE (container));
  g_return_if_fail (callback != NULL);
  
  table = GTK_TABLE (container);
  children = table->children;
  
  while (children)
    {
      child = children->data;
      children = children->next;
      
      (* callback) (child->widget, callback_data);
    }
}

static void
gtk_table_size_request_init (GtkTable *table)
{
  GtkTableChild *child;
  GList *children;
  gint row, col;
  
  for (row = 0; row < table->nrows; row++)
    table->rows[row].requisition = 0;
  for (col = 0; col < table->ncols; col++)
    table->cols[col].requisition = 0;
  
  children = table->children;
  while (children)
    {
      child = children->data;
      children = children->next;
      
      if (GTK_WIDGET_VISIBLE (child->widget))
	gtk_widget_size_request (child->widget, NULL);
    }
}

static void
gtk_table_size_request_pass1 (GtkTable *table)
{
  GtkTableChild *child;
  GList *children;
  gint width;
  gint height;
  
  children = table->children;
  while (children)
    {
      child = children->data;
      children = children->next;
      
      if (GTK_WIDGET_VISIBLE (child->widget))
	{
	  GtkRequisition child_requisition;
	  gtk_widget_get_child_requisition (child->widget, &child_requisition);

	  /* Child spans a single column.
	   */
	  if (child->left_attach == (child->right_attach - 1))
	    {
	      width = child_requisition.width + child->xpadding * 2;
	      table->cols[child->left_attach].requisition = MAX (table->cols[child->left_attach].requisition, width);
	    }
	  
	  /* Child spans a single row.
	   */
	  if (child->top_attach == (child->bottom_attach - 1))
	    {
	      height = child_requisition.height + child->ypadding * 2;
	      table->rows[child->top_attach].requisition = MAX (table->rows[child->top_attach].requisition, height);
	    }
	}
    }
}

static void
gtk_table_size_request_pass2 (GtkTable *table)
{
  gint max_width;
  gint max_height;
  gint row, col;
  
  if (table->homogeneous)
    {
      max_width = 0;
      max_height = 0;
      
      for (col = 0; col < table->ncols; col++)
	max_width = MAX (max_width, table->cols[col].requisition);
      for (row = 0; row < table->nrows; row++)
	max_height = MAX (max_height, table->rows[row].requisition);
      
      for (col = 0; col < table->ncols; col++)
	table->cols[col].requisition = max_width;
      for (row = 0; row < table->nrows; row++)
	table->rows[row].requisition = max_height;
    }
}

static void
gtk_table_size_request_pass3 (GtkTable *table)
{
  GtkTableChild *child;
  GList *children;
  gint width, height;
  gint row, col;
  gint extra;
  
  children = table->children;
  while (children)
    {
      child = children->data;
      children = children->next;
      
      if (GTK_WIDGET_VISIBLE (child->widget))
	{
	  /* Child spans multiple columns.
	   */
	  if (child->left_attach != (child->right_attach - 1))
	    {
	      GtkRequisition child_requisition;

	      gtk_widget_get_child_requisition (child->widget, &child_requisition);
	      
	      /* Check and see if there is already enough space
	       *  for the child.
	       */
	      width = 0;
	      for (col = child->left_attach; col < child->right_attach; col++)