Search bar improvements.

Split the search entry into a new widget to manage hints (EHintedEntry).
Let the search entry expand to use available horizontal space.

1 files changed, 298 insertions, 0 deletions

diff --git a/widgets/misc/e-hinted-entry.c b/widgets/misc/e-hinted-entry.c
new file mode 100644
index 0000000000..ca75e85297
--- /dev/null
+++ b/widgets/misc/e-hinted-entry.c
@@ -0,0 +1,298 @@
+/*
+ * e-hinted-entry.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ *
+ * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
+ *
+ */
+
+#include "e-hinted-entry.h"
+
+#define E_HINTED_ENTRY_GET_PRIVATE(obj) \
+	(G_TYPE_INSTANCE_GET_PRIVATE \
+	((obj), E_TYPE_HINTED_ENTRY, EHintedEntryPrivate))
+
+struct _EHintedEntryPrivate {
+	gchar *hint;
+	guint hint_shown : 1;
+};
+
+enum {
+	PROP_0,
+	PROP_HINT,
+	PROP_HINT_SHOWN
+};
+
+static gpointer parent_class;
+
+static void
+hinted_entry_hide_hint (EHintedEntry *entry)
+{
+	gtk_entry_set_text (GTK_ENTRY (entry), "");
+
+	gtk_widget_modify_text (GTK_WIDGET (entry), GTK_STATE_NORMAL, NULL);
+
+	entry->priv->hint_shown = FALSE;
+
+	g_object_notify (G_OBJECT (entry), "hint-shown");
+}
+
+static void
+hinted_entry_show_hint (EHintedEntry *entry)
+{
+	GtkStyle *style;
+	const GdkColor *color;
+	const gchar *hint;
+
+	hint = e_hinted_entry_get_hint (entry);
+	gtk_entry_set_text (GTK_ENTRY (entry), hint);
+
+	style = gtk_widget_get_style (GTK_WIDGET (entry));
+	color = &style->text[GTK_STATE_INSENSITIVE];
+	gtk_widget_modify_text (GTK_WIDGET (entry), GTK_STATE_NORMAL, color);
+
+	entry->priv->hint_shown = TRUE;
+
+	g_object_notify (G_OBJECT (entry), "hint-shown");
+}
+
+static void
+hinted_entry_set_property (GObject *object,
+                           guint property_id,
+                           const GValue *value,
+                           GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_HINT:
+			e_hinted_entry_set_hint (
+				E_HINTED_ENTRY (object),
+				g_value_get_string (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+hinted_entry_get_property (GObject *object,
+                           guint property_id,
+                           GValue *value,
+                           GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_HINT:
+			g_value_set_string (
+				value, e_hinted_entry_get_hint (
+				E_HINTED_ENTRY (object)));
+			return;
+
+		case PROP_HINT_SHOWN:
+			g_value_set_boolean (
+				value, e_hinted_entry_get_hint_shown (
+				E_HINTED_ENTRY (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+hinted_entry_finalize (GObject *object)
+{
+	EHintedEntryPrivate *priv;
+
+	priv = E_HINTED_ENTRY_GET_PRIVATE (object);
+
+	g_free (priv->hint);
+
+	/* Chain up to parent's finalize() method. */
+	G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+hinted_entry_focus_in_event (GtkWidget *widget,
+                             GdkEventFocus *event)
+{
+	EHintedEntry *entry = E_HINTED_ENTRY (widget);
+
+	if (e_hinted_entry_get_hint_shown (entry))
+		hinted_entry_hide_hint (entry);
+
+	/* Chain up to parent's focus_in_event() method. */
+	return GTK_WIDGET_CLASS (parent_class)->
+		focus_in_event (widget, event);
+}
+
+static gboolean
+hinted_entry_focus_out_event (GtkWidget *widget,
+                              GdkEventFocus *event)
+{
+	EHintedEntry *entry = E_HINTED_ENTRY (widget);
+	const gchar *text;
+
+	text = e_hinted_entry_get_text (entry);
+
+	if (text == NULL || *text == '\0')
+		hinted_entry_show_hint (E_HINTED_ENTRY (widget));
+
+	/* Chain up to parent's focus_out_event() method. */
+	return GTK_WIDGET_CLASS (parent_class)->
+		focus_out_event (widget, event);
+}
+
+static void
+hinted_entry_class_init (EHintedEntryClass *class)
+{
+	GObjectClass *object_class;
+	GtkWidgetClass *widget_class;
+
+	parent_class = g_type_class_peek_parent (class);
+	g_type_class_add_private (class, sizeof (EHintedEntryPrivate));
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->set_property = hinted_entry_set_property;
+	object_class->get_property = hinted_entry_get_property;
+	object_class->finalize = hinted_entry_finalize;
+
+	widget_class = GTK_WIDGET_CLASS (class);
+	widget_class->focus_in_event = hinted_entry_focus_in_event;
+	widget_class->focus_out_event = hinted_entry_focus_out_event;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_HINT,
+		g_param_spec_string (
+			"hint",
+			"Hint",
+			NULL,
+			NULL,
+			G_PARAM_READWRITE));
+
+	g_object_class_install_property (
+		object_class,
+		PROP_HINT_SHOWN,
+		g_param_spec_boolean (
+			"hint-shown",
+			"Hint Shown",
+			NULL,
+			FALSE,
+			G_PARAM_READABLE));
+}
+
+static void
+hinted_entry_init (EHintedEntry *entry)
+{
+	entry->priv = E_HINTED_ENTRY_GET_PRIVATE (entry);
+	entry->priv->hint = g_strdup ("");  /* hint must never be NULL */
+}
+
+GType
+e_hinted_entry_get_type (void)
+{
+	static GType type = 0;
+
+	if (G_UNLIKELY (type == 0)) {
+		static const GTypeInfo type_info = {
+			sizeof (EHintedEntryClass),
+			(GBaseInitFunc) NULL,
+			(GBaseFinalizeFunc) NULL,
+			(GClassInitFunc) hinted_entry_class_init,
+			(GClassFinalizeFunc) NULL,
+			NULL,  /* class_data */
+			sizeof (EHintedEntry),
+			0,     /* n_preallocs */
+			(GInstanceInitFunc) hinted_entry_init,
+			NULL   /* value_table */
+		};
+
+		type = g_type_register_static (
+			GTK_TYPE_ENTRY, "EHintedEntry", &type_info, 0);
+	}
+
+	return type;
+}
+
+GtkWidget *
+e_hinted_entry_new (void)
+{
+	return g_object_new (E_TYPE_HINTED_ENTRY, NULL);
+}
+
+const gchar *
+e_hinted_entry_get_hint (EHintedEntry *entry)
+{
+	g_return_val_if_fail (E_IS_HINTED_ENTRY (entry), NULL);
+
+	return entry->priv->hint;
+}
+
+void
+e_hinted_entry_set_hint (EHintedEntry *entry,
+                         const gchar *hint)
+{
+	g_return_if_fail (E_IS_HINTED_ENTRY (entry));
+
+	if (hint == NULL)
+		hint = "";
+
+	g_free (entry->priv->hint);
+	entry->priv->hint = g_strdup (hint);
+
+	if (e_hinted_entry_get_hint_shown (entry))
+		gtk_entry_set_text (GTK_ENTRY (entry), hint);
+
+	g_object_notify (G_OBJECT (entry), "hint");
+}
+
+gboolean
+e_hinted_entry_get_hint_shown (EHintedEntry *entry)
+{
+	g_return_val_if_fail (E_IS_HINTED_ENTRY (entry), FALSE);
+
+	return entry->priv->hint_shown;
+}
+
+const gchar *
+e_hinted_entry_get_text (EHintedEntry *entry)
+{
+	/* XXX This clumsily overrides gtk_entry_get_text(). */
+
+	g_return_val_if_fail (E_IS_HINTED_ENTRY (entry), NULL);
+
+	if (e_hinted_entry_get_hint_shown (entry))
+		return "";
+
+	return gtk_entry_get_text (GTK_ENTRY (entry));
+}
+
+void
+e_hinted_entry_set_text (EHintedEntry *entry,
+                         const gchar *text)
+{
+	/* XXX This clumsily overrides gtk_entry_set_text(). */
+
+	g_return_if_fail (E_IS_HINTED_ENTRY (entry));
+
+	if (text == NULL)
+		text = "";
+
+	if (*text == '\0' && !GTK_WIDGET_HAS_FOCUS (entry))
+		hinted_entry_show_hint (entry);
+	else {
+		hinted_entry_hide_hint (entry);
+		gtk_entry_set_text (GTK_ENTRY (entry), text);
+	}
+}