C++ pango_layout_set_width函数代码示例

static void
draw_header (GtkPrintContext * cnt, gint pn, gint pc)
{
  cairo_t *cr;
  PangoFontDescription *desc;
  PangoLayout *layout;
  gint pw, tw, th;
  gchar *page;

  cr = gtk_print_context_get_cairo_context (cnt);
  pw = gtk_print_context_get_width (cnt);

  layout = gtk_print_context_create_pango_layout (cnt);

  desc = pango_font_description_from_string (HEADER_FONT);
  pango_layout_set_font_description (layout, desc);
  pango_font_description_free (desc);

  pango_layout_set_text (layout, options.common_data.uri, -1);
  pango_layout_get_pixel_size (layout, &tw, &th);
  if (tw > pw)
    {
      pango_layout_set_width (layout, pw);
      pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_START);
      pango_layout_get_pixel_size (layout, &tw, &th);
    }

  cairo_move_to (cr, (pw - tw) / 2, (HEADER_HEIGHT - th) / 2);
  pango_cairo_show_layout (cr, layout);

  page = g_strdup_printf ("%d/%d", pn, pc);
  pango_layout_set_text (layout, page, -1);
  g_free (page);

  pango_layout_set_width (layout, -1);
  pango_layout_get_pixel_size (layout, &tw, &th);
  cairo_move_to (cr, pw - tw - 4, (HEADER_HEIGHT - th) / 2);
  pango_cairo_show_layout (cr, layout);

  g_object_unref (layout);

  cairo_move_to (cr, 0.0, HEADER_HEIGHT);
  cairo_line_to (cr, pw, HEADER_HEIGHT);

  cairo_set_source_rgb (cr, 0, 0, 0);
  cairo_set_line_width (cr, 1);
  cairo_stroke (cr);
}

void SetUpStatusBarStuff (GtkWidget* aWindow)
{
	_String			   fName = baseDirectory & "GTKResources/striped.xpm";
	statusBarLayout			 = pango_layout_new (screenPContext);
	statusBarFontDesc		 = pango_font_description_new ();
	stripedFill				 = gdk_pixmap_create_from_xpm (GDK_DRAWABLE(aWindow->window), NULL, NULL, fName.sData);
	stripedFillGC			 = gdk_gc_new (GDK_DRAWABLE(aWindow->window));
	if (stripedFill)
	{
		gdk_gc_set_fill (stripedFillGC,GDK_TILED);
		gdk_gc_set_tile	(stripedFillGC,stripedFill);
	}
	else
	{
		printf ("Failed to load a status bar .xpm from %s\n", fName.sData);
	}
	
	gdk_gc_set_line_attributes		  (stripedFillGC, 1, GDK_LINE_SOLID, GDK_CAP_NOT_LAST, GDK_JOIN_MITER);
	GdkColor saveFG = {0,0,0,0};
	gdk_gc_set_foreground			  (stripedFillGC, &saveFG);

	pango_font_description_set_family (statusBarFontDesc, statusBarFont.face.sData);
	pango_font_description_set_style  (statusBarFontDesc, (statusBarFont.style & HY_FONT_ITALIC) ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL);
	pango_font_description_set_weight (statusBarFontDesc, (statusBarFont.style & HY_FONT_BOLD) ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL);
	pango_font_description_set_size   (statusBarFontDesc, statusBarFont.size*PANGO_SCALE);
	pango_layout_set_font_description (statusBarLayout, statusBarFontDesc ); // ref ?
	pango_layout_set_width			  (statusBarLayout, -1);
	
	redButtonIcon = (GdkPixbuf*)ProcureIconResource(4000);
	yellowButtonIcon = (GdkPixbuf*)ProcureIconResource(4001);
	greenButtonIcon = (GdkPixbuf*)ProcureIconResource(4002);
	orangeButtonIcon = (GdkPixbuf*)ProcureIconResource(4003);
	
}

GtGraphics* gt_graphics_cairo_new_from_context(cairo_t *context,
                                               unsigned int width,
                                               unsigned int height)
{
  GtGraphics *g;
  GtGraphicsCairo *gc;
  char buf[64];
  g = gt_graphics_create(gt_graphics_cairo_class());
  gc = gt_graphics_cairo_cast(g);
  gc->width = width;
  gc->height = height;
  gc->margin_x = gc->margin_y = 20;
  gc->from_context = true;
  gc->cr = context;
  gc->layout = pango_cairo_create_layout(gc->cr);
  pango_layout_set_width(gc->layout, -1);
  gt_assert(gc->layout);
  snprintf(buf, 64, "Sans %d", TEXT_SIZE_DEFAULT);
  gc->desc = pango_font_description_from_string(buf);
  pango_layout_set_font_description(gc->layout, gc->desc);
  pango_font_description_free(gc->desc);
  cairo_set_line_join(context, CAIRO_LINE_JOIN_ROUND);
  cairo_set_line_cap(context, CAIRO_LINE_CAP_ROUND);
  return g;
}

static
void mw_paint_tip(GtkWidget *widget, GdkEventExpose *event)
{
	GtkStyle *style;
	GdkWindow *window;
	char *tooltiptext = get_tooltip_text();

	if(tooltiptext == NULL) tooltiptext = g_strdup("oeps");
	pango_layout_set_markup(layout, tooltiptext, strlen(tooltiptext));
	pango_layout_set_wrap(layout, PANGO_WRAP_WORD);
	pango_layout_set_width(layout, 300000);
	style = gtk_widget_get_style (tipwindow);
	window = gtk_widget_get_window (tipwindow);

	gtk_paint_flat_box (style, window, GTK_STATE_NORMAL, GTK_SHADOW_OUT,
			NULL, tipwindow, "tooltip", 0, 0, -1, -1);


	gtk_paint_layout (style, window, GTK_STATE_NORMAL, TRUE,
			NULL, tipwindow, "tooltip", 4, 4, layout);
	/*
	   g_object_unref(layout);
	   */
	g_free(tooltiptext);
	return;
}

void tooltip_update()
{
	if (!g_tooltip.tooltip_text) {
		tooltip_hide(0);
		return;
	}

	tooltip_update_geometry();
	if (just_shown) {
		if (!panel_horizontal)
			y -= height / 2; // center vertically
		just_shown = FALSE;
	}
	tooltip_adjust_geometry();
	XMoveResizeWindow(server.display, g_tooltip.window, x, y, width, height);

	// Stuff for drawing the tooltip
	cairo_surface_t *cs = cairo_xlib_surface_create(server.display, g_tooltip.window, server.visual, width, height);
	cairo_t *c = cairo_create(cs);
	Color bc = g_tooltip.bg->fill_color;
	Border b = g_tooltip.bg->border;
	if (server.real_transparency) {
		clear_pixmap(g_tooltip.window, 0, 0, width, height);
		draw_rect(c, b.width, b.width, width - 2 * b.width, height - 2 * b.width, b.radius - b.width / 1.571);
		cairo_set_source_rgba(c, bc.rgb[0], bc.rgb[1], bc.rgb[2], bc.alpha);
	} else {
		cairo_rectangle(c, 0., 0, width, height);
		cairo_set_source_rgb(c, bc.rgb[0], bc.rgb[1], bc.rgb[2]);
	}
	cairo_fill(c);
	cairo_set_line_width(c, b.width);
	if (server.real_transparency)
		draw_rect(c, b.width / 2.0, b.width / 2.0, width - b.width, height - b.width, b.radius);
	else
		cairo_rectangle(c, b.width / 2.0, b.width / 2.0, width - b.width, height - b.width);
	cairo_set_source_rgba(c, b.color.rgb[0], b.color.rgb[1], b.color.rgb[2], b.color.alpha);
	cairo_stroke(c);

	Color fc = g_tooltip.font_color;
	cairo_set_source_rgba(c, fc.rgb[0], fc.rgb[1], fc.rgb[2], fc.alpha);
	PangoLayout *layout = pango_cairo_create_layout(c);
	pango_layout_set_font_description(layout, g_tooltip.font_desc);
	pango_layout_set_wrap(layout, PANGO_WRAP_WORD);
	pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
	PangoRectangle r1, r2;
	pango_layout_get_pixel_extents(layout, &r1, &r2);
	pango_layout_set_width(layout, width * PANGO_SCALE);
	pango_layout_set_height(layout, height * PANGO_SCALE);
	pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
	// I do not know why this is the right way, but with the below cairo_move_to it seems to be centered (horiz. and
	// vert.)
	cairo_move_to(c,
				  -r1.x / 2 + g_tooltip.bg->border.width + g_tooltip.paddingx,
				  -r1.y / 2 + 1 + g_tooltip.bg->border.width + g_tooltip.paddingy);
	pango_cairo_show_layout(c, layout);

	g_object_unref(layout);
	cairo_destroy(c);
	cairo_surface_destroy(cs);
}

void tooltip_update_geometry()
{
	Panel *panel = g_tooltip.panel;
	int screen_width = server.monitors[panel->monitor].x + server.monitors[panel->monitor].width;

	cairo_surface_t *cs = cairo_xlib_surface_create(server.display, g_tooltip.window, server.visual, width, height);
	cairo_t *c = cairo_create(cs);
	PangoLayout *layout = pango_cairo_create_layout(c);

	pango_layout_set_font_description(layout, g_tooltip.font_desc);
	PangoRectangle r1, r2;
	pango_layout_set_text(layout, "1234567890", -1);
	pango_layout_get_pixel_extents(layout, &r1, &r2);
	int max_width = MIN(r2.width * 7, screen_width * 2 / 3);
	pango_layout_set_width(layout, max_width * PANGO_SCALE);

	pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
	pango_layout_set_wrap(layout, PANGO_WRAP_WORD);
	pango_layout_get_pixel_extents(layout, &r1, &r2);
	width = 2 * g_tooltip.bg->border.width + 2 * g_tooltip.paddingx + r2.width;
	height = 2 * g_tooltip.bg->border.width + 2 * g_tooltip.paddingy + r2.height;

	if (panel_horizontal && panel_position & BOTTOM)
		y = panel->posy - height;
	else if (panel_horizontal && panel_position & TOP)
		y = panel->posy + panel->area.height;
	else if (panel_position & LEFT)
		x = panel->posx + panel->area.width;
	else
		x = panel->posx - width;

	g_object_unref(layout);
	cairo_destroy(c);
	cairo_surface_destroy(cs);
}

static void
gtk_label_layoutable_size_allocate (GtkLayoutable        *layoutable,
                                    GtkAllocation        *allocation)
{
  GtkLabel *label = GTK_LABEL (layoutable);

  if (gtk_label_get_line_wrap (label))
    {
      PangoLayout *layout;
      PangoRectangle rect;

      /* Make it span the entire line.  */
      layout = gtk_label_get_layout (label);
      pango_layout_set_width (layout, allocation->width * PANGO_SCALE);
      pango_layout_get_extents (layout, NULL, &rect);

      allocation->width = rect.width / PANGO_SCALE + label->misc.xpad * 2;
      allocation->height = rect.height / PANGO_SCALE + label->misc.ypad * 2;

      gtk_misc_set_alignment (&label->misc, 0.0, 0.0);
      gtk_widget_size_allocate (GTK_WIDGET (label), allocation);
    }

  else
    (gtk_label_parent_layoutable_iface->size_allocate) (layoutable, allocation);
}

void
content_draw (GtkWidget *widget,
              cairo_t   *cr)
{
        PangoContext *context;
        PangoLayout *title_layout;
        PangoLayout *sub_layout;
        PangoFontDescription *desc;
        int width, height;
        int sub_width;

        width = gdk_window_get_width (gtk_widget_get_window (widget));
        height = gdk_window_get_height (gtk_widget_get_window (widget));

        cairo_translate (cr, width / 2, height / 2);

        context = gdk_pango_context_get_for_screen (gtk_widget_get_screen (widget));

        title_layout = pango_layout_new (context);
        pango_layout_set_text (title_layout, _("This session is locked"), -1);
        desc = pango_font_description_from_string (TITLE_FONT);
        pango_layout_set_font_description (title_layout, desc);
        pango_font_description_free (desc);

        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0);

        pango_cairo_update_layout (cr, title_layout);
        pango_layout_get_size (title_layout, &width, &height);

        cairo_save (cr);
        /* Adjust the translation to the middle left of the icon */
        cairo_translate (cr, - width / PANGO_SCALE / 2 - height / PANGO_SCALE, - height / PANGO_SCALE / 2);
        draw_lock_icon (cr, height / PANGO_SCALE);
        cairo_restore (cr);

        cairo_move_to (cr, - width / PANGO_SCALE / 2 + height / PANGO_SCALE, - height / PANGO_SCALE);
        pango_cairo_show_layout (cr, title_layout);

        g_object_unref (title_layout);

        sub_layout = pango_layout_new (context);
        pango_layout_set_text (sub_layout, _("You'll be redirected to the unlock dialog automatically in a few seconds"), -1);
        pango_layout_set_wrap (sub_layout, PANGO_WRAP_WORD_CHAR);
        pango_layout_set_width (sub_layout, width + 2 * height);
        desc = pango_font_description_from_string (MESSAGE_FONT);
        pango_layout_set_font_description (sub_layout, desc);
        pango_font_description_free (desc);

        cairo_set_source_rgba (cr, 0.6, 0.6, 0.6, 1.0);

        pango_cairo_update_layout (cr, sub_layout);
        pango_layout_get_size (sub_layout, &sub_width, NULL);

        cairo_move_to (cr, - (width + 2 * height) / PANGO_SCALE / 2, height / PANGO_SCALE);
        cairo_scale (cr, (width + 2 * height) / (gdouble)sub_width, (width + 2 * height) / (gdouble)sub_width);
        pango_cairo_show_layout (cr, sub_layout);

        g_object_unref (sub_layout);
        g_object_unref (context);
}

/**
 * draw a cell of a model
 *
 * \param context           the GtkPrintContext
 * \param line_position     the position to insert the column
 * \param column_position   the position to insert the data
 *
 * \return the new column_position
 * */
static gint print_tree_view_list_draw_cell ( GtkPrintContext *context,
                        gint line_position,
                        gint column_position,
                        gint column,
                        const gchar *text )
{
    PangoLayout *layout;

    /* draw first the column */
    column_position = print_tree_view_list_draw_column ( column_position, line_position );

    cairo_move_to (cr, column_position, line_position);

    /* create the new layout */
    layout = gtk_print_context_create_pango_layout (context);
    pango_layout_set_text ( layout, text, -1 );
    pango_layout_set_font_description ( layout, gsb_data_print_config_get_font_transactions () );
    pango_layout_set_width ( layout,columns_width[column] );
    pango_layout_set_alignment ( layout, alignment[column] );
    pango_layout_set_ellipsize ( layout, PANGO_ELLIPSIZE_END );

    pango_cairo_show_layout ( cr, layout );
    g_object_unref ( layout );

    return column_position;
}

void draw_taskbarname(void* obj, cairo_t* c) {
  Taskbarname* taskbar_name = obj;
  Taskbar* taskbar = taskbar_name->area.parent;
  PangoLayout* layout;
  color_T* config_text = (taskbar->desktop == server.desktop)
                           ? &taskbarname_active_font
                           : &taskbarname_font;

  int state =
      (taskbar->desktop == server.desktop) ? TASKBAR_ACTIVE : TASKBAR_NORMAL;
  taskbar_name->state_pix[state] = taskbar_name->area.pix;

  // draw content
  layout = pango_cairo_create_layout(c);
  pango_layout_set_font_description(layout, taskbarname_font_desc);
  pango_layout_set_width(layout, taskbar_name->area.width * PANGO_SCALE);
  pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
  pango_layout_set_text(layout, taskbar_name->name, strlen(taskbar_name->name));

  {
    double colors[4];
    color_extract_components_to_array(config_text, colors);
    cairo_set_source_rgba(c, colors[0], colors[1], colors[2], colors[3]);
  }

  pango_cairo_update_layout(c, layout);
  cairo_move_to(c, 0, taskbar_name->posy);
  pango_cairo_show_layout(c, layout);

  g_object_unref(layout);
  // printf("draw_taskbarname %s ******************************\n",
  // taskbar_name->name);
}

static PangoLayout *
create_layout_with_attrs (GtkWidget *widget,
                          GdTwoLinesRenderer *self,
                          PangoEllipsizeMode ellipsize)
{
  PangoLayout *layout;
  gint wrap_width;
  PangoWrapMode wrap_mode;
  PangoAlignment alignment;

  g_object_get (self,
                "wrap-width", &wrap_width,
                "wrap-mode", &wrap_mode,
                "alignment", &alignment,
                NULL);

  layout = pango_layout_new (gtk_widget_get_pango_context (widget));

  pango_layout_set_ellipsize (layout, ellipsize);
  pango_layout_set_wrap (layout, wrap_mode);
  pango_layout_set_alignment (layout, alignment);

  if (wrap_width != -1)
    pango_layout_set_width (layout, wrap_width * PANGO_SCALE);

  return layout;
}

/* 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 void
e_contact_output (GtkPrintContext *context,
                  PangoFontDescription *font,
                  gdouble x,
                  gdouble y,
                  gdouble width,
                  const gchar *text)
{
	PangoLayout *layout;
	gdouble indent;
	cairo_t *cr;

	layout = gtk_print_context_create_pango_layout (context);

	if (width == -1 || get_font_width (context, font, text) <= width)
		indent = .0;
	else
		indent = get_font_width (context, font, "     ");

	pango_layout_set_font_description (layout, font);
	pango_layout_set_text (layout, text, -1);
	pango_layout_set_width (layout, pango_units_from_double (width));
	pango_layout_set_indent (layout, pango_units_from_double (indent));
	pango_layout_set_wrap (layout, PANGO_WRAP_WORD_CHAR);

	cr = gtk_print_context_get_cairo_context (context);

	cairo_save (cr);
	cairo_move_to (cr, x, y);
	pango_cairo_show_layout (cr, layout);
	cairo_restore (cr);

	g_object_unref (layout);
}

void ZDrawSongInfo(IDirectFB *dfb, IDirectFBSurface *dfbsurface, const gchar *title, const gchar *artist, 
		gint w, gint h, DFBColor *color, DFBColor *strokeColor, double strokeWidth, const PangoFontDescription *desc)
{
	cairo_t *cr = NULL;
	cairo_surface_t *surface = NULL;
	cairo_surface_t *cairosurface = NULL;
	PangoLayout *layout = NULL;
	
	if(!dfb || !dfbsurface)
		return;
	
	/* prepare layout */
	layout = pango_layout_new(gdk_pango_context_get());
	pango_layout_set_single_paragraph_mode (layout, TRUE);
	pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
	pango_layout_set_width(layout, w* PANGO_SCALE);
	pango_layout_set_font_description(layout, desc);
	
	surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
	cr = cairo_create(surface);
	
	/* Draw title */
	if(title) {
		pango_layout_set_text(layout, title, -1);
		cairo_move_to(cr, 0, 0);
		pango_cairo_layout_path(cr, layout);
		ZCairoSetDFBColor(cr, strokeColor);
		cairo_set_line_width(cr, strokeWidth);
		cairo_stroke_preserve(cr);
		
		ZCairoSetDFBColor(cr, color);
		cairo_fill(cr);
	}
	
	/* Draw artist */
	if(artist) {
		pango_layout_set_text(layout, artist, -1);
		cairo_move_to(cr, 0, h/2);
		pango_cairo_layout_path(cr, layout);
		ZCairoSetDFBColor(cr, strokeColor);
		cairo_set_line_width(cr, strokeWidth);
		cairo_stroke_preserve(cr);
		
		ZCairoSetDFBColor(cr, color);
		cairo_fill(cr);
	}
	
	g_object_unref(layout);
	cairo_destroy(cr);
	
	/* Draw cairo_surface to dfbsurface */
	/* create surface */
	cairosurface = cairo_directfb_surface_create(dfb, dfbsurface);
	cr = cairo_create(cairosurface);
	cairo_set_source_surface(cr, surface, 0, 0);
	cairo_paint(cr);
	cairo_destroy(cr);
	cairo_surface_destroy(surface);
	cairo_surface_destroy(cairosurface);
}

TextAsset::Size
TextAsset::computeSizeOfText(cairo_t* cairoContext,
                             const std::string textString,
                             int bounds,
                             PangoFontDescription* font,
                             Rect* tight,
                             float* lineHeightOut)
{
    PangoLayout* layout = pango_cairo_create_layout(cairoContext);

    // Kerning
    PangoAttrList* attr_list = pango_attr_list_new();
    PangoAttribute* spacing_attr = pango_attr_letter_spacing_new(pango_units_from_double(_kern));
    pango_attr_list_insert(attr_list, spacing_attr);
    pango_layout_set_attributes(layout, attr_list);

    pango_cairo_context_set_resolution(pango_layout_get_context(layout), DISPLAY_RESOLUTION);
    pango_layout_set_text(layout, textString.c_str(), (int)textString.length());
    pango_layout_set_alignment(layout, _alignment);
    pango_layout_set_wrap(layout, PANGO_WRAP_WORD_CHAR);

    const Size maxTextureSize(bounds, 1024);
    pango_layout_set_width(layout, pango_units_from_double(maxTextureSize.width));
    pango_layout_set_height(layout, pango_units_from_double(maxTextureSize.height));
    pango_layout_set_font_description(layout, font);
    applyLeading(cairoContext, layout, font);

    PangoRectangle estimateSize;
    PangoRectangle ink;
    pango_layout_get_pixel_extents(layout, &ink, &estimateSize);

    // If the text is right or center aligned the offsets will contain all the
    // leading space.  We ignore that for the size because drawText will draw
    // in the larger box.  The tight box below will get the offsets so we know
    // where to draw so the text lands in the same tight box.
    Size res(estimateSize.width, estimateSize.height);

    if (tight != NULL) {
        float lineHeight;
        float xHeight = charHeight(cairoContext, font, 'x', &lineHeight);
        if (lineHeightOut != NULL) {
            *lineHeightOut = lineHeight;
        }
        const float capHeight = charHeight(cairoContext, font, 'Y');
        const float ascender = pango_units_to_double(pango_layout_get_baseline(layout));
        const float topSpace = ascender - capHeight;
        const float bottomSpace = MAX(lineHeight - ascender - (capHeight - xHeight), 0);
        if (res.height > topSpace + bottomSpace) {
            *tight = Rect(estimateSize.x,
                          estimateSize.y + topSpace,
                          res.width,
                          res.height - topSpace - bottomSpace);
        } else {
            *tight = Rect(0, 0, res.width, res.height);
        }
    }
    g_object_unref(layout);

    return res;
}