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label: Redo size computation

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This gets use closer to the label sizing discussed on the mailing lists.
This commit is contained in:
Benjamin Otte 2011-04-18 00:30:17 +02:00
parent 8e34bff045
commit 26b2f3127a
1 changed files with 24 additions and 47 deletions
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71
gtk/gtklabel.c
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@ -3544,7 +3544,6 @@ gtk_label_get_preferred_layout_size (GtkLabel *label,
{
GtkLabelPrivate *priv = label->priv;
PangoLayout *layout;
gint text_width;
/* "width-chars" Hard-coded minimum width:
* - minimum size should be MAX (width-chars, strlen ("..."));
@ -3562,63 +3561,41 @@ gtk_label_get_preferred_layout_size (GtkLabel *label,
* width will default to the wrap guess that gtk_label_ensure_layout() does.
*/
/* Start off with the pixel extents of an as-wide-as-possible layout */
layout = gtk_label_get_measuring_layout (label, NULL, -1);
/* Start off with the pixel extents of the rendered layout */
pango_layout_get_extents (layout, NULL, required);
required->x = required->y = 0;
pango_layout_get_extents (layout, NULL, natural);
natural->x = natural->y = 0;
if (priv->single_line_mode || priv->wrap)
required->height = get_single_line_height (GTK_WIDGET (label), layout);
*natural = *required;
/* Fetch the length of the complete unwrapped text */
text_width = required->width;
natural->height = get_single_line_height (GTK_WIDGET (label), layout);
if (priv->ellipsize || priv->wrap)
{
gint char_pixels, ellipsize_chars;
/* a layout with widdth 0 will be as small as humanly possible */
layout = gtk_label_get_measuring_layout (label, layout, 0);
char_pixels = get_char_pixels (GTK_WIDGET (label), layout);
/* enforce minimum width for ellipsized labels at ~3 chars */
ellipsize_chars = priv->ellipsize ? 3 : 0;
required->width = char_pixels * MAX (priv->width_chars, ellipsize_chars);
/* Default to the minimum width regularly guessed by GTK+ if no minimum
* width was specified, only allow unwrapping of these labels.
*
* Note that when specifying a small width_chars for a long text;
* an accordingly large size will be required for the label height.
*/
if (priv->wrap && priv->width_chars <= 0)
required->width = text_width;
if (priv->max_width_chars < 0)
{
natural->width = MAX (required->width, text_width);
}
else
{
gint max_char_width = char_pixels * priv->max_width_chars;
gint max_width = MIN (text_width, max_char_width);
/* With max-char-width specified, we let the minimum widths of
* ellipsized text crawl up to the max-char-width
* (note that we dont want to limit the minimum width for wrapping text).
*/
if (priv->ellipsize)
required->width = MIN (text_width, max_width);
natural->width = MAX (required->width, max_width);
}
pango_layout_get_extents (layout, NULL, required);
required->x = required->y = 0;
required->height = natural->height;
}
else
{
required->width = text_width;
natural->width = required->width;
*required = *natural;
}
if (priv->width_chars > -1 || priv->max_width_chars > -1)
{
gint char_pixels;
char_pixels = get_char_pixels (GTK_WIDGET (label), layout);
if (priv->width_chars > -1)
required->width = MAX (required->width, char_pixels * priv->width_chars);
if (priv->max_width_chars > -1)
natural->width = MIN (natural->width, priv->max_width_chars * char_pixels);
natural->width = MAX (natural->width, required->width);
}
g_object_unref (layout);