1 /* Copyright (c) 2007, Nokia Corporation
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * * Neither the name of the Nokia Corporation nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
18 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
20 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
21 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include <glib/gi18n-lib.h>
34 #include <gtk/gtktextview.h>
36 #include <modest-scroll-text.h>
38 #define MODEST_SCROLL_TEXT_DEFAULT_LINE_LIMIT 2
40 static GObjectClass *parent_class = NULL;
42 typedef struct _ModestScrollTextPriv ModestScrollTextPriv;
44 struct _ModestScrollTextPriv
51 #define MODEST_SCROLL_TEXT_GET_PRIVATE(o) \
52 (G_TYPE_INSTANCE_GET_PRIVATE ((o), MODEST_TYPE_SCROLL_TEXT, ModestScrollTextPriv))
56 * modest_scroll_text_new:
58 * Return value: a new #ModestScrollText instance implemented for Gtk+
61 modest_scroll_text_new (GtkTextView *text_view, guint line_limit)
63 ModestScrollText *self = g_object_new (MODEST_TYPE_SCROLL_TEXT, NULL);
64 modest_scroll_text_set_line_limit (self, line_limit);
65 modest_scroll_text_set_text_view (self, text_view);
67 return GTK_WIDGET (self);
71 size_request (GtkWidget *widget,
72 GtkRequisition *requisition,
75 ModestScrollTextPriv *priv = MODEST_SCROLL_TEXT_GET_PRIVATE (widget);
76 const GtkWidget *text_view = NULL;
77 GtkTextBuffer *buffer = NULL;
81 GdkRectangle iter_rectangle;
82 GtkAdjustment *adj = NULL;
84 text_view = modest_scroll_text_get_text_view (MODEST_SCROLL_TEXT (widget));
85 line_limit = priv->line_limit;
87 buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
89 /* get the first line and the height of the line */
90 gtk_text_buffer_get_start_iter (buffer, &iter);
91 gtk_text_view_get_iter_location (GTK_TEXT_VIEW (text_view), &iter, &iter_rectangle);
93 /* Count lines in text view */
94 for (line = 0; line < line_limit; line++) {
95 if (!gtk_text_view_forward_display_line (GTK_TEXT_VIEW (text_view), &iter))
99 /* Put again the cursor in the first character. Also scroll to first line */
100 gtk_text_buffer_get_start_iter (buffer, &iter);
101 gtk_text_buffer_place_cursor (buffer, &iter);
102 gtk_text_view_place_cursor_onscreen (GTK_TEXT_VIEW (text_view));
104 /* Change the adjustment properties for one line per step behavior */
105 adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (widget));
107 g_object_set (G_OBJECT (adj), "page-increment", (gdouble) iter_rectangle.height, "step-increment", (gdouble) iter_rectangle.height, NULL);
108 gtk_adjustment_changed (adj);
111 /* Set the requisition height to the get the limit of lines or less */
113 requisition->height = iter_rectangle.height * MAX (line, line_limit);
115 requisition->height = iter_rectangle.height;
118 priv->line_height = iter_rectangle.height;
123 size_allocate (GtkWidget *widget,
124 GtkAllocation *allocation,
127 GtkAdjustment *adj = NULL;
128 ModestScrollTextPriv *priv = MODEST_SCROLL_TEXT_GET_PRIVATE (widget);
130 adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (widget));
132 g_object_set (G_OBJECT (adj), "page-increment", (gdouble) priv->line_height, "step-increment", (gdouble) priv->line_height, NULL);
134 gtk_adjustment_changed (adj);
138 modest_scroll_text_set_line_limit (ModestScrollText *scroll_text, guint line_limit)
140 ModestScrollTextPriv *priv = MODEST_SCROLL_TEXT_GET_PRIVATE (scroll_text);
142 if (line_limit == priv->line_limit)
145 priv->line_limit = line_limit;
146 if (GTK_WIDGET_REALIZED (scroll_text)) {
147 gtk_widget_queue_resize (GTK_WIDGET (scroll_text));
152 modest_scroll_text_get_text_view (ModestScrollText *scroll_text)
154 ModestScrollTextPriv *priv = MODEST_SCROLL_TEXT_GET_PRIVATE (scroll_text);
156 if (priv->text_view == NULL)
157 modest_scroll_text_set_text_view (scroll_text, NULL);
159 return priv->text_view;
163 modest_scroll_text_set_text_view (ModestScrollText *scroll_text,
164 GtkTextView *text_view)
166 ModestScrollTextPriv *priv = MODEST_SCROLL_TEXT_GET_PRIVATE (scroll_text);
169 g_return_if_fail (MODEST_IS_SCROLL_TEXT (scroll_text));
170 if (text_view == NULL) {
171 text_view = GTK_TEXT_VIEW(gtk_text_view_new ());
172 gtk_text_view_set_cursor_visible (GTK_TEXT_VIEW (text_view), FALSE);
173 gtk_text_view_set_editable (GTK_TEXT_VIEW (text_view), FALSE);
176 if (priv->text_view == GTK_WIDGET(text_view))
179 if (priv->text_view != NULL) {
180 gtk_container_remove (GTK_CONTAINER(scroll_text), priv->text_view);
181 priv->text_view = NULL;
184 priv->text_view = GTK_WIDGET(text_view);
186 gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (priv->text_view), GTK_WRAP_WORD_CHAR);
187 gtk_text_view_set_pixels_above_lines (GTK_TEXT_VIEW (priv->text_view), 0);
188 gtk_text_view_set_pixels_below_lines (GTK_TEXT_VIEW (priv->text_view), 0);
189 gtk_text_view_set_justification (GTK_TEXT_VIEW (priv->text_view), GTK_JUSTIFY_LEFT);
190 gtk_text_view_set_left_margin (GTK_TEXT_VIEW (priv->text_view), 0);
191 gtk_text_view_set_right_margin (GTK_TEXT_VIEW (priv->text_view), 0);
193 style = gtk_rc_get_style (GTK_WIDGET (scroll_text));
194 gtk_widget_modify_base (priv->text_view, GTK_STATE_NORMAL, & (style->bg[GTK_STATE_NORMAL]));
196 gtk_container_add (GTK_CONTAINER (scroll_text), priv->text_view);
198 if (GTK_WIDGET_REALIZED (scroll_text)) {
199 gtk_widget_queue_resize (GTK_WIDGET (scroll_text));
204 modest_scroll_text_instance_init (GTypeInstance *instance, gpointer g_class)
206 ModestScrollTextPriv *priv = MODEST_SCROLL_TEXT_GET_PRIVATE (instance);
208 gtk_scrolled_window_set_hadjustment (GTK_SCROLLED_WINDOW (instance), NULL);
209 gtk_scrolled_window_set_vadjustment (GTK_SCROLLED_WINDOW (instance), NULL);
211 priv->line_limit = MODEST_SCROLL_TEXT_DEFAULT_LINE_LIMIT;
213 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (instance), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
215 g_signal_connect (G_OBJECT (instance), "size-request", G_CALLBACK (size_request), NULL);
216 g_signal_connect (G_OBJECT (instance), "size-allocate", G_CALLBACK (size_allocate), NULL);
222 modest_scroll_text_finalize (GObject *object)
224 (*parent_class->finalize) (object);
230 modest_scroll_text_class_init (ModestScrollTextClass *klass)
232 GObjectClass *object_class;
233 GtkWidgetClass *widget_class;
235 parent_class = g_type_class_peek_parent (klass);
236 object_class = (GObjectClass*) klass;
237 widget_class = GTK_WIDGET_CLASS (klass);
239 object_class->finalize = modest_scroll_text_finalize;
241 g_type_class_add_private (object_class, sizeof (ModestScrollTextPriv));
247 modest_scroll_text_get_type (void)
249 static GType type = 0;
251 if (G_UNLIKELY(type == 0))
253 static const GTypeInfo info =
255 sizeof (ModestScrollTextClass),
256 NULL, /* base_init */
257 NULL, /* base_finalize */
258 (GClassInitFunc) modest_scroll_text_class_init, /* class_init */
259 NULL, /* class_finalize */
260 NULL, /* class_data */
261 sizeof (ModestScrollText),
263 modest_scroll_text_instance_init /* instance_init */
266 type = g_type_register_static (GTK_TYPE_SCROLLED_WINDOW,