7c0e80c745
git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@5283 ea778897-0a13-0410-b9d1-a72fbfd435f5
152 lines
4.1 KiB
C
152 lines
4.1 KiB
C
/*
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* geanywraplabel.c - this file is part of Geany, a fast and lightweight IDE
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*
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* Copyright 2009-2010 Enrico Tröger <enrico(dot)troeger(at)uvena(dot)de>
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* Copyright 2009-2010 Nick Treleaven <nick(dot)treleaven(at)btinternet(dot)com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $Id$
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*/
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/*
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* A GtkLabel subclass that can wrap to any width, unlike GtkLabel which has a fixed wrap point.
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* (inspired by libview's WrapLabel, http://view.sourceforge.net)
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*/
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#include "geany.h"
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#include "utils.h"
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#include "geanywraplabel.h"
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#define GEANY_WRAP_LABEL_GET_PRIVATE(obj) (GEANY_WRAP_LABEL(obj)->priv)
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struct _GeanyWrapLabelClass
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{
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GtkLabelClass parent_class;
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};
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typedef struct
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{
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gsize wrap_width;
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} GeanyWrapLabelPrivate;
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struct _GeanyWrapLabel
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{
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GtkLabel parent;
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GeanyWrapLabelPrivate *priv;
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};
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static void geany_wrap_label_size_request (GtkWidget *widget, GtkRequisition *req);
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static void geany_wrap_label_size_allocate (GtkWidget *widget, GtkAllocation *alloc);
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static void geany_wrap_label_set_wrap_width (GtkWidget *widget, gsize width);
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G_DEFINE_TYPE(GeanyWrapLabel, geany_wrap_label, GTK_TYPE_LABEL)
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static void geany_wrap_label_class_init(GeanyWrapLabelClass *klass)
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{
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
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widget_class->size_request = geany_wrap_label_size_request;
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widget_class->size_allocate = geany_wrap_label_size_allocate;
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g_type_class_add_private(klass, sizeof (GeanyWrapLabelPrivate));
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}
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static void geany_wrap_label_init(GeanyWrapLabel *self)
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{
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GeanyWrapLabelPrivate *priv;
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE(self,
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GEANY_WRAP_LABEL_TYPE, GeanyWrapLabelPrivate);
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priv = self->priv;
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priv->wrap_width = 0;
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}
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/* Sets the point at which the text should wrap. */
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static void geany_wrap_label_set_wrap_width(GtkWidget *widget, gsize width)
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{
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GeanyWrapLabelPrivate *priv;
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if (width == 0)
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return;
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/*
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* We may need to reset the wrap width, so do this regardless of whether
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* or not we've changed the width.
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*/
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pango_layout_set_width(gtk_label_get_layout(GTK_LABEL(widget)), width * PANGO_SCALE);
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priv = GEANY_WRAP_LABEL_GET_PRIVATE(widget);
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if (priv->wrap_width != width)
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{
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priv->wrap_width = width;
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gtk_widget_queue_resize(widget);
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}
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}
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/* Forces the height to be the size necessary for the Pango layout, while allowing the
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* width to be flexible. */
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static void geany_wrap_label_size_request(GtkWidget *widget, GtkRequisition *req)
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{
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gint height;
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pango_layout_get_pixel_size(gtk_label_get_layout(GTK_LABEL(widget)), NULL, &height);
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req->width = 0;
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req->height = height;
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}
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/* Sets the wrap width to the width allocated to us. */
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static void geany_wrap_label_size_allocate(GtkWidget *widget, GtkAllocation *alloc)
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{
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(* GTK_WIDGET_CLASS(geany_wrap_label_parent_class)->size_allocate)(widget, alloc);
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geany_wrap_label_set_wrap_width(widget, alloc->width);
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}
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void geany_wrap_label_set_text(GtkLabel *label, const gchar *text)
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{
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GeanyWrapLabelPrivate *priv = GEANY_WRAP_LABEL_GET_PRIVATE(label);
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gtk_label_set_text(label, text);
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geany_wrap_label_set_wrap_width(GTK_WIDGET(label), priv->wrap_width);
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}
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GtkWidget *geany_wrap_label_new(const gchar *text)
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{
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GtkWidget *l = g_object_new(GEANY_WRAP_LABEL_TYPE, NULL);
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if (NZV(text))
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gtk_label_set_text(GTK_LABEL(l), text);
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pango_layout_set_wrap(gtk_label_get_layout(GTK_LABEL(l)), PANGO_WRAP_WORD_CHAR);
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gtk_misc_set_alignment(GTK_MISC(l), 0.0, 0.0);
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return l;
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}
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