libempathy-gtk/empathy-input-text-view.c

   1 /*
   2  * Copyright (C) 2002-2007 Imendio AB
   3  * Copyright (C) 2007-2010 Collabora Ltd.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public
  16  * License along with this program; if not, write to the
  17  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  18  * Boston, MA  02110-1301  USA
  19  *
  20  * Authors: Mikael Hallendal <micke@imendio.com>
  21  *          Richard Hult <richard@imendio.com>
  22  *          Martyn Russell <martyn@imendio.com>
  23  *          Geert-Jan Van den Bogaerde <geertjan@gnome.org>
  24  *          Xavier Claessens <xclaesse@gmail.com>
  25  *          Guillaume Desmottes <guillaume.desmottes@collabora.co.uk>
  26  */
  27
  28 #include "empathy-input-text-view.h"
  29
  30 G_DEFINE_TYPE (EmpathyInputTextView, empathy_input_text_view,
  31     GTK_TYPE_TEXT_VIEW);
  32
  33 #define MAX_INPUT_HEIGHT 150
  34
  35 struct _EmpathyInputTextViewPrivate
  36 {
  37   gboolean has_input_vscroll;
  38 };
  39
  40 static void
  41 empathy_input_text_view_get_preferred_height (GtkWidget *widget,
  42     gint *minimum_height,
  43     gint *natural_height)
  44 {
  45   EmpathyInputTextView *self = (EmpathyInputTextView *) widget;
  46   GtkWidget *sw;
  47
  48   GTK_WIDGET_CLASS (empathy_input_text_view_parent_class)->get_preferred_height
  49     (widget, minimum_height, natural_height);
  50
  51   sw = gtk_widget_get_parent (widget);
  52   if (*minimum_height >= MAX_INPUT_HEIGHT && !self->priv->has_input_vscroll)
  53     {
  54       /* Display scroll bar */
  55       gtk_widget_set_size_request (sw, -1, MAX_INPUT_HEIGHT);
  56
  57       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
  58           GTK_POLICY_NEVER,
  59           GTK_POLICY_ALWAYS);
  60
  61       self->priv->has_input_vscroll = TRUE;
  62     }
  63
  64   if (*minimum_height < MAX_INPUT_HEIGHT && self->priv->has_input_vscroll)
  65     {
  66       /* Hide scroll bar */
  67       gtk_widget_set_size_request (sw, -1, -1);
  68
  69       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
  70           GTK_POLICY_NEVER,
  71           GTK_POLICY_NEVER);
  72
  73       self->priv->has_input_vscroll = FALSE;
  74     }
  75 }
  76
  77 static void
  78 empathy_input_text_view_class_init (EmpathyInputTextViewClass *cls)
  79 {
  80   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (cls);
  81
  82   widget_class->get_preferred_height =
  83     empathy_input_text_view_get_preferred_height;
  84
  85   g_type_class_add_private (cls, sizeof (EmpathyInputTextViewPrivate));
  86 }
  87
  88 static void
  89 empathy_input_text_view_init (EmpathyInputTextView *self)
  90 {
  91   self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
  92       EMPATHY_TYPE_INPUT_TEXT_VIEW, EmpathyInputTextViewPrivate);
  93 }
  94
  95 GtkWidget *
  96 empathy_input_text_view_new (void)
  97 {
  98     return g_object_new (EMPATHY_TYPE_INPUT_TEXT_VIEW,
  99         "pixels-above-lines", 2,
 100         "pixels-below-lines", 2,
 101         "pixels-inside-wrap", 1,
 102         "right-margin", 2,
 103         "left-margin", 2,
 104         "wrap-mode", GTK_WRAP_WORD_CHAR,
 105         NULL);
 106 }