/* Handle a size allocation by re-laying-out each paragraph to
* the new width, setting the new size for the layout and
* then queing a redraw
*/
void
size_allocate (GtkWidget *layout, GtkAllocation *allocation)
{
GList *tmp_list;
guint height = 0;
PangoDirection base_dir = pango_context_get_base_dir (context);
tmp_list = paragraphs;
while (tmp_list)
{
Paragraph *para = tmp_list->data;
PangoRectangle logical_rect;
tmp_list = tmp_list->next;
pango_layout_set_alignment (para->layout,
base_dir == PANGO_DIRECTION_LTR ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT);
pango_layout_set_width (para->layout, layout->allocation.width * PANGO_SCALE);
pango_layout_get_extents (para->layout, NULL, &logical_rect);
para->height = PANGO_PIXELS (logical_rect.height);
height += para->height;
}
gtk_layout_set_size (GTK_LAYOUT (layout), allocation->width, height);
if (GTK_LAYOUT (layout)->yoffset + allocation->height > height)
gtk_adjustment_set_value (GTK_LAYOUT (layout)->vadjustment, (float)(height - allocation->height));
}
static gboolean
on_entry_draw (GtkWidget *widget,
cairo_t *cr,
gpointer user_data)
{
g_debug (G_STRLOC ": %s", G_STRFUNC);
GtkStyleContext *style_context;
PangoContext *pango_context;
PangoLayout *layout;
const char *text;
gint cursor_index;
gint x, y;
style_context = gtk_widget_get_style_context (widget);
pango_context = gtk_widget_get_pango_context (widget);
layout = gtk_entry_get_layout (GTK_ENTRY (widget));
text = pango_layout_get_text (layout);
gtk_entry_get_layout_offsets (GTK_ENTRY (widget), &x, &y);
cursor_index = g_utf8_offset_to_pointer (text, gtk_editable_get_position (GTK_EDITABLE (widget))) - text;
gtk_render_insertion_cursor (style_context, cr, x, y, layout, cursor_index,
pango_context_get_base_dir (pango_context));
return FALSE;
}
unsigned Gosu::pango::textWidth(const std::wstring& text,
const std::wstring& fontFace, unsigned fontHeight,
unsigned fontFlags)
{
g_type_init();
int dpi_x = 100, dpi_y = 100;
context = pango_ft2_get_context(dpi_x, dpi_y);
pango_context_set_language(context, pango_language_from_string ("en_US"));
PangoDirection init_dir = PANGO_DIRECTION_LTR;
pango_context_set_base_dir(context, init_dir);
// static PangoFontDescription *font_description;
font_description = pango_font_description_new();
pango_font_description_set_family(font_description,
g_strdup(narrow(fontFace).c_str()));
pango_font_description_set_style(font_description,
(fontFlags & ffItalic) ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL);
pango_font_description_set_variant(font_description, PANGO_VARIANT_NORMAL);
pango_font_description_set_weight(font_description,
(fontFlags & ffBold) ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL);
pango_font_description_set_stretch(font_description, PANGO_STRETCH_NORMAL);
int init_scale = int(fontHeight/2.0 + 0.5);
pango_font_description_set_size(font_description, init_scale * PANGO_SCALE);
pango_context_set_font_description(context, font_description);
layout = pango_layout_new(context);
if(fontFlags & ffUnderline)
{
// PangoAttribute *attr;
attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
attr->start_index = 0;
attr->end_index = text.length();
// PangoAttrList* attrList;
attrList = pango_attr_list_new();
pango_attr_list_insert(attrList, attr);
pango_layout_set_attributes(layout, attrList);
pango_attr_list_unref(attrList);
}
// IMPR: Catch errors? (Last NULL-Pointer)
gchar* utf8Str = g_ucs4_to_utf8((gunichar*)text.c_str(), text.length(), NULL, NULL, NULL);
pango_layout_set_text(layout, utf8Str, -1);
g_free(utf8Str);
PangoDirection base_dir = pango_context_get_base_dir(context);
pango_layout_set_alignment(layout,
base_dir == PANGO_DIRECTION_LTR ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT);
pango_layout_set_width(layout, -1);
PangoRectangle logical_rect;
pango_layout_get_pixel_extents(layout, NULL, &logical_rect);
height = logical_rect.height;
width = logical_rect.width;
return width;
}
