diff options
Diffstat (limited to 'widgets/misc/e-clipped-label.c')
| -rw-r--r-- | widgets/misc/e-clipped-label.c | 423 |
1 files changed, 0 insertions, 423 deletions
diff --git a/widgets/misc/e-clipped-label.c b/widgets/misc/e-clipped-label.c deleted file mode 100644 index 820398e891..0000000000 --- a/widgets/misc/e-clipped-label.c +++ /dev/null @@ -1,423 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ - -/* - * Author : - * Damon Chaplin <damon@ximian.com> - * - * Copyright 1999, Ximian, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - * USA - */ - -/* - * This is similar to GtkLabel but clips itself and displays '...' if it - * can't fit inside its allocated area. The intended use is for inside buttons - * that are a fixed size. The GtkLabel would normally display only the middle - * part of the text, which doesn't look very good. This only supports one line - * of text (so no wrapping/justification), without underlined characters. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include "e-clipped-label.h" - -#include <math.h> -#include <string.h> - -#include <glib.h> -#include <gdk/gdki18n.h> -#include <libgnome/gnome-i18n.h> - - -static void e_clipped_label_class_init (EClippedLabelClass *class); -static void e_clipped_label_init (EClippedLabel *label); -static void e_clipped_label_size_request (GtkWidget *widget, - GtkRequisition *requisition); -static void e_clipped_label_size_allocate (GtkWidget *widget, - GtkAllocation *allocation); -static gint e_clipped_label_expose (GtkWidget *widget, - GdkEventExpose *event); -static void e_clipped_label_recalc_chars_displayed (EClippedLabel *label); -static void e_clipped_label_finalize (GObject *object); - -static void build_layout (EClippedLabel *label, const char *text); - -static GtkMiscClass *parent_class; - -/* This is the string to draw when the label is clipped, e.g. '...'. */ -static gchar *e_clipped_label_ellipsis; - -/* Flags used in chars_displayed field. Must be negative. */ -#define E_CLIPPED_LABEL_NEED_RECALC -1 -#define E_CLIPPED_LABEL_SHOW_ENTIRE_LABEL -2 - - -GtkType -e_clipped_label_get_type (void) -{ - static GtkType e_clipped_label_type = 0; - - if (!e_clipped_label_type){ - GtkTypeInfo e_clipped_label_info = { - "EClippedLabel", - sizeof (EClippedLabel), - sizeof (EClippedLabelClass), - (GtkClassInitFunc) e_clipped_label_class_init, - (GtkObjectInitFunc) e_clipped_label_init, - NULL, /* reserved 1 */ - NULL, /* reserved 2 */ - (GtkClassInitFunc) NULL - }; - - parent_class = g_type_class_ref(GTK_TYPE_MISC); - e_clipped_label_type = gtk_type_unique (GTK_TYPE_MISC, - &e_clipped_label_info); - } - - return e_clipped_label_type; -} - - -static void -e_clipped_label_class_init (EClippedLabelClass *class) -{ - GObjectClass *object_class; - GtkWidgetClass *widget_class; - - object_class = (GObjectClass *) class; - widget_class = (GtkWidgetClass *) class; - - /* Method override */ - widget_class->size_request = e_clipped_label_size_request; - widget_class->size_allocate = e_clipped_label_size_allocate; - widget_class->expose_event = e_clipped_label_expose; - - object_class->finalize = e_clipped_label_finalize; - - e_clipped_label_ellipsis = _("..."); -} - - -static void -e_clipped_label_init (EClippedLabel *label) -{ - GTK_WIDGET_SET_FLAGS (label, GTK_NO_WINDOW); - - label->label = NULL; - label->chars_displayed = E_CLIPPED_LABEL_NEED_RECALC; -} - - -/** - * e_clipped_label_new: - * - * @text: The label text. - * @Returns: A new #EClippedLabel. - * - * Creates a new #EClippedLabel with the given text. - **/ -GtkWidget * -e_clipped_label_new (const gchar *text, - PangoWeight font_weight, - gfloat font_size) -{ - GtkWidget *label; - EClippedLabel *clipped; - - label = GTK_WIDGET (gtk_type_new (e_clipped_label_get_type ())); - - clipped = E_CLIPPED_LABEL (label); - - clipped->font_size = font_size; - clipped->font_weight = font_weight; - clipped->layout = NULL; - - build_layout (clipped, e_clipped_label_ellipsis); - pango_layout_get_pixel_size (clipped->layout, &clipped->ellipsis_width, NULL); - - if (text && *text) - e_clipped_label_set_text (clipped, text); - - return label; -} - -static void -build_layout (EClippedLabel *label, const char *text) -{ - if (!label->layout) { - GtkStyle *style = gtk_widget_get_style (GTK_WIDGET (label)); - PangoFontDescription *desc = pango_font_description_copy (style->font_desc); - - label->layout = gtk_widget_create_pango_layout (GTK_WIDGET (label), text); - - pango_font_description_set_size (desc, pango_font_description_get_size (desc) * label->font_size); - - pango_font_description_set_weight (desc, label->font_weight); - pango_layout_set_font_description (label->layout, desc); - pango_font_description_free (desc); - } - - pango_layout_set_text (label->layout, text, -1); -} - -static void -e_clipped_label_size_request (GtkWidget *widget, - GtkRequisition *requisition) -{ - EClippedLabel *label; - int height; - int width; - - g_return_if_fail (E_IS_CLIPPED_LABEL (widget)); - g_return_if_fail (requisition != NULL); - - label = E_CLIPPED_LABEL (widget); - - pango_layout_get_pixel_size (label->layout, &width, &height); - - requisition->width = 0; - requisition->height = height + 2 * GTK_MISC (widget)->ypad; -} - - -static void -e_clipped_label_size_allocate (GtkWidget *widget, - GtkAllocation *allocation) -{ - EClippedLabel *label; - - label = E_CLIPPED_LABEL (widget); - - widget->allocation = *allocation; - - /* Flag that we need to recalculate how many characters to display. */ - label->chars_displayed = E_CLIPPED_LABEL_NEED_RECALC; -} - - -static gint -e_clipped_label_expose (GtkWidget *widget, - GdkEventExpose *event) -{ - EClippedLabel *label; - GtkMisc *misc; - gint x; - PangoRectangle rect; - - g_return_val_if_fail (E_IS_CLIPPED_LABEL (widget), FALSE); - g_return_val_if_fail (event != NULL, FALSE); - - label = E_CLIPPED_LABEL (widget); - misc = GTK_MISC (widget); - - /* If the label isn't visible or has no text, just return. */ - if (!GTK_WIDGET_VISIBLE (widget) || !GTK_WIDGET_MAPPED (widget) - || !label->label || (*label->label == '\0')) - return TRUE; - - /* Recalculate the number of characters displayed, if necessary. */ - if (label->chars_displayed == E_CLIPPED_LABEL_NEED_RECALC) - e_clipped_label_recalc_chars_displayed (label); - - /* - * GC Clipping - */ - gdk_gc_set_clip_rectangle (widget->style->white_gc, - &event->area); - gdk_gc_set_clip_rectangle (widget->style->fg_gc[widget->state], - &event->area); - - pango_layout_get_pixel_extents (label->layout, &rect, NULL); - - if (label->chars_displayed == E_CLIPPED_LABEL_SHOW_ENTIRE_LABEL) { - x = floor (widget->allocation.x + (gint)misc->xpad - + (((gint)widget->allocation.width - - (gint)label->label_width - 2 * (gint)misc->xpad) - * misc->xalign) + 0.5); - - gdk_draw_layout (widget->window, widget->style->fg_gc[widget->state], - x, label->label_y, label->layout); - } else { - int layout_width; - - x = widget->allocation.x + (gint)misc->xpad; - - /* trim the layout to the number of characters we're displaying */ - pango_layout_set_text (label->layout, label->label, label->chars_displayed); - - /* draw it */ - gdk_draw_layout (widget->window, widget->style->fg_gc[widget->state], - x, label->label_y, label->layout); - - pango_layout_get_pixel_size (label->layout, &layout_width, NULL); - - /* offset the X position for the ellipsis */ - x = widget->allocation.x + (gint)misc->xpad - + label->ellipsis_x; - - /* then draw the ellipsis */ - pango_layout_set_text (label->layout, e_clipped_label_ellipsis, strlen (e_clipped_label_ellipsis)); - - gdk_draw_layout (widget->window, widget->style->fg_gc[widget->state], - x, label->label_y, label->layout); - - /* then reset the layout to our original label text */ - pango_layout_set_text (label->layout, label->label, -1); - } - - gdk_gc_set_clip_mask (widget->style->white_gc, NULL); - gdk_gc_set_clip_mask (widget->style->fg_gc[widget->state], NULL); - - return TRUE; -} - - -static void -e_clipped_label_finalize (GObject *object) -{ - EClippedLabel *label; - - g_return_if_fail (E_IS_CLIPPED_LABEL (object)); - - label = E_CLIPPED_LABEL(object); - - g_free (label->label); - - g_object_unref (label->layout); - - (* G_OBJECT_CLASS (parent_class)->finalize) (object); -} - - -/** - * e_clipped_label_get_text: - * - * @label: An #EClippedLabel. - * @Return: The label text. - * - * Returns the label text, or NULL. - **/ -gchar* -e_clipped_label_get_text (EClippedLabel *label) -{ - g_return_val_if_fail (E_IS_CLIPPED_LABEL (label), NULL); - - return label->label; -} - - -/** - * e_clipped_label_set_text: - * - * @label: An #EClippedLabel. - * @text: The new label text. - * - * Sets the label text. - **/ -void -e_clipped_label_set_text (EClippedLabel *label, - const gchar *text) -{ - g_return_if_fail (E_IS_CLIPPED_LABEL (label)); - - if (label->label != text || !label->label || !text - || strcmp (label->label, text)) { - g_free (label->label); - label->label = NULL; - - if (text) - label->label = g_strdup (text); - - build_layout (label, text); - - /* Reset the number of characters displayed, so it is - recalculated when needed. */ - label->chars_displayed = E_CLIPPED_LABEL_NEED_RECALC; - - /* We don't queue a resize, since the label should not affect - the widget size, but we queue a draw. */ - gtk_widget_queue_draw (GTK_WIDGET (label)); - } -} - - -static void -e_clipped_label_recalc_chars_displayed (EClippedLabel *label) -{ - gint max_width, width; - GSList *lines; - PangoLayoutLine *line; - int index; - PangoRectangle rect; - GtkWidget *widget = GTK_WIDGET (label); - GtkMisc *misc = GTK_MISC (label); - - max_width = GTK_WIDGET (label)->allocation.width - - 2 * GTK_MISC (label)->xpad; - - if (!label->label) { - label->chars_displayed = 0; - return; - } - - /* See if the entire label fits in the allocated width. */ - pango_layout_set_text (label->layout, label->label, -1); - - pango_layout_get_pixel_extents (label->layout, &rect, NULL); - - label->label_y = floor (widget->allocation.y + (gint)misc->ypad - + (((gint)widget->allocation.height - 2 * (gint)misc->ypad - + (gint)PANGO_ASCENT (rect) - PANGO_DESCENT(rect)) - * misc->yalign) + 0.5); - - pango_layout_get_pixel_size (label->layout, &label->label_width, NULL); - if (label->label_width <= max_width) { - label->chars_displayed = E_CLIPPED_LABEL_SHOW_ENTIRE_LABEL; - return; - } - - if (max_width <= 0) { - label->chars_displayed = 0; - label->ellipsis_x = 0; - return; - } - - max_width -= label->ellipsis_width; - - lines = pango_layout_get_lines (label->layout); - line = lines->data; - - if (!pango_layout_line_x_to_index (line, - max_width * PANGO_SCALE, - &index, - NULL)) { - g_warning ("pango_layout_line_x_to_index returned false"); - return; - } - -#if 0 - g_slist_foreach (lines, (GFunc)pango_layout_line_unref, NULL); - g_slist_free (lines); -#endif - - label->chars_displayed = index; - - pango_layout_set_text (label->layout, label->label, label->chars_displayed); - pango_layout_get_pixel_size (label->layout, &width, NULL); - - label->ellipsis_x = width; -} |