static gboolean
query_unlock_tooltip (GtkWidget *widget,
gint x,
gint y,
gboolean keyboard_tooltip,
GtkTooltip *tooltip,
gpointer user_data)
{
GtkWidget *label;
PangoLayout *layout;
PangoAttrList *attrs;
IconShapeData *data;
data = g_object_get_data (G_OBJECT (widget), "icon-shape-data");
label = g_object_get_data (G_OBJECT (widget), "tooltip-label");
if (label == NULL) {
label = gtk_label_new (data->text);
g_object_ref_sink (label);
g_object_set_data_full (G_OBJECT (widget),
"tooltip-label", label, g_object_unref);
}
layout = gtk_label_get_layout (GTK_LABEL (label));
pango_cairo_context_set_shape_renderer (pango_layout_get_context (layout),
icon_shape_renderer,
data, NULL);
attrs = create_shape_attr_list_for_layout (layout, data);
gtk_label_set_attributes (GTK_LABEL (label), attrs);
pango_attr_list_unref (attrs);
gtk_tooltip_set_custom (tooltip, label);
return TRUE;
}
GtkWidget *
do_rotated_text (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
if (!window)
{
GtkWidget *box;
GtkWidget *drawing_area;
GtkWidget *label;
PangoLayout *layout;
PangoAttrList *attrs;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_screen (GTK_WINDOW (window),
gtk_widget_get_screen (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Rotated Text");
gtk_window_set_default_size (GTK_WINDOW (window), 4 * RADIUS, 2 * RADIUS);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
gtk_container_add (GTK_CONTAINER (window), box);
/* Add a drawing area */
drawing_area = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (box), drawing_area);
gtk_style_context_add_class (gtk_widget_get_style_context (drawing_area),
GTK_STYLE_CLASS_VIEW);
gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area),
rotated_text_draw,
NULL, NULL);
/* And a label */
label = gtk_label_new (text);
gtk_container_add (GTK_CONTAINER (box), label);
gtk_label_set_angle (GTK_LABEL (label), 45);
/* Set up fancy stuff on the label */
layout = gtk_label_get_layout (GTK_LABEL (label));
pango_cairo_context_set_shape_renderer (pango_layout_get_context (layout),
fancy_shape_renderer,
NULL, NULL);
attrs = create_fancy_attr_list_for_layout (layout);
gtk_label_set_attributes (GTK_LABEL (label), attrs);
pango_attr_list_unref (attrs);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show_all (window);
else
gtk_widget_destroy (window);
return window;
}
static PangoLayout *
get_layout (cairo_t *cr)
{
PangoLayout *layout;
PangoAttrList *attrs;
PangoRectangle ink_rect = {1 * PANGO_SCALE, -11 * PANGO_SCALE, 8 * PANGO_SCALE, 10 * PANGO_SCALE};
PangoRectangle logical_rect = {0 * PANGO_SCALE, -12 * PANGO_SCALE, 10 * PANGO_SCALE, 12 * PANGO_SCALE};
const char *p;
/* Create a PangoLayout, set the font and text */
layout = pango_cairo_create_layout (cr);
pango_cairo_context_set_shape_renderer (pango_layout_get_context (layout),
mini_svg_shape_renderer, NULL, NULL);
pango_layout_set_text (layout, text, -1);
attrs = pango_attr_list_new ();
/* Set gnome shape attributes for all bullets */
for (p = text; (p = strstr (p, BULLET)); p += strlen (BULLET))
{
PangoAttribute *attr;
attr = pango_attr_shape_new_with_data (&ink_rect,
&logical_rect,
&GnomeFootLogo,
NULL, NULL);
attr->start_index = p - text;
attr->end_index = attr->start_index + strlen (BULLET);
pango_attr_list_insert (attrs, attr);
}
pango_layout_set_attributes (layout, attrs);
pango_attr_list_unref (attrs);
return layout;
}
static void
rotated_text_draw (GtkDrawingArea *da,
cairo_t *cr,
int width,
int height,
gpointer data)
{
#define RADIUS 150
#define N_WORDS 5
#define FONT "Serif 18"
PangoContext *context;
PangoLayout *layout;
PangoFontDescription *desc;
cairo_pattern_t *pattern;
PangoAttrList *attrs;
double device_radius;
int i;
/* Create a cairo context and set up a transformation matrix so that the user
* space coordinates for the centered square where we draw are [-RADIUS, RADIUS],
* [-RADIUS, RADIUS].
* We first center, then change the scale. */
device_radius = MIN (width, height) / 2.;
cairo_translate (cr,
device_radius + (width - 2 * device_radius) / 2,
device_radius + (height - 2 * device_radius) / 2);
cairo_scale (cr, device_radius / RADIUS, device_radius / RADIUS);
/* Create and a subtle gradient source and use it. */
pattern = cairo_pattern_create_linear (-RADIUS, -RADIUS, RADIUS, RADIUS);
cairo_pattern_add_color_stop_rgb (pattern, 0., .5, .0, .0);
cairo_pattern_add_color_stop_rgb (pattern, 1., .0, .0, .5);
cairo_set_source (cr, pattern);
/* Create a PangoContext and set up our shape renderer */
context = gtk_widget_create_pango_context (GTK_WIDGET (da));
pango_cairo_context_set_shape_renderer (context,
fancy_shape_renderer,
NULL, NULL);
/* Create a PangoLayout, set the text, font, and attributes */
layout = pango_layout_new (context);
pango_layout_set_text (layout, text, -1);
desc = pango_font_description_from_string (FONT);
pango_layout_set_font_description (layout, desc);
attrs = create_fancy_attr_list_for_layout (layout);
pango_layout_set_attributes (layout, attrs);
pango_attr_list_unref (attrs);
/* Draw the layout N_WORDS times in a circle */
for (i = 0; i < N_WORDS; i++)
{
int width, height;
/* Inform Pango to re-layout the text with the new transformation matrix */
pango_cairo_update_layout (cr, layout);
pango_layout_get_pixel_size (layout, &width, &height);
cairo_move_to (cr, - width / 2, - RADIUS * .9);
pango_cairo_show_layout (cr, layout);
/* Rotate for the next turn */
cairo_rotate (cr, G_PI*2 / N_WORDS);
}
/* free the objects we created */
pango_font_description_free (desc);
g_object_unref (layout);
g_object_unref (context);
cairo_pattern_destroy (pattern);
}
