preferences: Add TotemPreferencesDialog

Most of the code is what was there in preferences.c, but with a twist: it now
has a GtkDialog subclass handling the preferences.

The laborious part of this change is replacing the old GtkBuilder-based
mechanism to retrieve widgets by their name with binding template children.
Signal callbacks can now be static, and be passed explicitly instead of using
G_MODULE_EXPORT to preserve their symbols.

This commit is the smallest possible way to achieve this, and doesn't make
use of various niceties and good practices of GTK development. Next commits
will cleanup and improve preferences to actually use more modern GTK practices.

4 files changed, 116 insertions, 77 deletions

diff --git a/data/preferences.ui b/data/preferences.ui
index 166fe5129..a115255a3 100644
--- a/data/preferences.ui
+++ b/data/preferences.ui
@@ -66,7 +66,7 @@
   <property name="value">32767</property>
 </object>
 
-<object class="GtkDialog" id="totem_preferences_window">
+<template class="TotemPreferencesDialog" parent="GtkDialog">
   <property name="title" translatable="yes">Preferences</property>
   <property name="type">GTK_WINDOW_TOPLEVEL</property>
   <property name="window_position">GTK_WIN_POS_CENTER_ON_PARENT</property>
@@ -243,7 +243,7 @@
 			    <object class="GtkComboBox" id="subtitle_encoding_combo">
 			      <property name="visible">True</property>
 			      <property name="focus_on_click">True</property>
-			      <signal name="changed" handler="encoding_set_cb"/>
+			      <signal name="changed" handler="encoding_set_cb" object="TotemPreferencesDialog" swapped="no"/>
 			    </object>
 			    <packing>
 			      <property name="left_attach">1</property>
@@ -265,7 +265,7 @@
 			      <property name="use_font">False</property>
 			      <property name="use_size">False</property>
 			      <property name="focus_on_click">True</property>
-			      <signal name="font-set" handler="font_set_cb"/>
+			      <signal name="font-set" handler="font_set_cb" object="TotemPreferencesDialog" swapped="no"/>
 			    </object>
 			    <packing>
 			      <property name="left_attach">1</property>
@@ -720,7 +720,7 @@
 				  <property name="use_underline">True</property>
 				  <property name="relief">GTK_RELIEF_NORMAL</property>
 				  <property name="focus_on_click">True</property>
-				  <signal name="clicked" handler="tpw_color_reset_clicked_cb"/>
+				  <signal name="clicked" handler="tpw_color_reset_clicked_cb" object="TotemPreferencesDialog" swapped="no"/>
 				</object>
 				<packing>
 				  <property name="padding">0</property>
@@ -946,5 +946,5 @@
       </child>
     </object>
   </child>
- </object>
+ </template>
 </interface>
diff --git a/src/totem-preferences.c b/src/totem-preferences.c
index c52fc1b67..e58c093a1 100644
--- a/src/totem-preferences.c
+++ b/src/totem-preferences.c
@@ -44,13 +44,30 @@
 #include "totem-subtitle-encoding.h"
 #include "totem-plugins-engine.h"
 
-#define PWID(x) (GtkWidget *) gtk_builder_get_object (totem->prefs_xml, x)
-#define POBJ(x) gtk_builder_get_object (totem->prefs_xml, x)
-
-/* Callback functions for GtkBuilder */
-G_MODULE_EXPORT void tpw_color_reset_clicked_cb (GtkButton *button, Totem *totem);
-G_MODULE_EXPORT void font_set_cb (GtkFontButton * fb, Totem * totem);
-G_MODULE_EXPORT void encoding_set_cb (GtkComboBox *cb, Totem *totem);
+struct _TotemPreferencesDialog {
+	GtkDialog parent_instance;
+
+	Totem *totem;
+
+	GtkRange *tpw_bright_scale;
+	GtkAdjustment *tpw_bright_adjustment;
+	GtkRange *tpw_contrast_scale;
+	GtkAdjustment *tpw_contrast_adjustment;
+	GtkRange *tpw_hue_scale;
+	GtkAdjustment *tpw_hue_adjustment;
+	GtkRange *tpw_saturation_scale;
+	GtkAdjustment *tpw_saturation_adjustment;
+
+	GtkFontChooser *font_sel_button;
+	GtkCheckButton *tpw_auto_subtitles_checkbutton;
+	GtkWidget *tpw_bright_contr_vbox;
+	GtkCheckButton *tpw_no_deinterlace_checkbutton;
+	GtkButton *tpw_plugins_button;
+	GtkComboBox *tpw_sound_output_combobox;
+	GtkComboBox *subtitle_encoding_combo;
+};
+
+G_DEFINE_TYPE (TotemPreferencesDialog, totem_preferences_dialog, GTK_TYPE_DIALOG)
 
 static void
 disable_kbd_shortcuts_changed_cb (GSettings *settings, const gchar *key, TotemObject *totem)
@@ -58,27 +75,19 @@ disable_kbd_shortcuts_changed_cb (GSettings *settings, const gchar *key, TotemOb
 	totem->disable_kbd_shortcuts = g_settings_get_boolean (totem->settings, "disable-keyboard-shortcuts");
 }
 
-void
-tpw_color_reset_clicked_cb (GtkButton *button, Totem *totem)
+static void
+tpw_color_reset_clicked_cb (GtkButton *button, TotemPreferencesDialog *prefs)
 {
-	guint i;
-	const char *scales[] = {
-		"tpw_bright_scale",
-		"tpw_contrast_scale",
-		"tpw_saturation_scale",
-		"tpw_hue_scale"
-	};
-
-	for (i = 0; i < G_N_ELEMENTS (scales); i++) {
-		GtkRange *item;
-		item = GTK_RANGE (POBJ (scales[i]));
-		gtk_range_set_value (item, 65535/2);
-	}
+	gtk_range_set_value (prefs->tpw_bright_scale, 65535/2);
+	gtk_range_set_value (prefs->tpw_contrast_scale, 65535/2);
+	gtk_range_set_value (prefs->tpw_hue_scale, 65535/2);
+	gtk_range_set_value (prefs->tpw_saturation_scale, 65535/2);
 }
 
-void
-font_set_cb (GtkFontButton * fb, Totem * totem)
+static void
+font_set_cb (GtkFontButton * fb, TotemPreferencesDialog * prefs)
 {
+	Totem *totem = prefs->totem;
 	gchar *font;
 
 	font = gtk_font_chooser_get_font (GTK_FONT_CHOOSER (fb));
@@ -86,9 +95,10 @@ font_set_cb (GtkFontButton * fb, Totem * totem)
 	g_free (font);
 }
 
-void
-encoding_set_cb (GtkComboBox *cb, Totem *totem)
+static void
+encoding_set_cb (GtkComboBox *cb, TotemPreferencesDialog *prefs)
 {
+	Totem *totem = prefs->totem;
 	const gchar *encoding;
 
 	encoding = totem_subtitle_encoding_get_selected (cb);
@@ -99,12 +109,11 @@ encoding_set_cb (GtkComboBox *cb, Totem *totem)
 static void
 font_changed_cb (GSettings *settings, const gchar *key, TotemObject *totem)
 {
+	TotemPreferencesDialog *prefs = TOTEM_PREFERENCES_DIALOG (totem->prefs);
 	gchar *font;
-	GtkFontButton *item;
 
-	item = GTK_FONT_BUTTON (POBJ ("font_sel_button"));
 	font = g_settings_get_string (settings, "subtitle-font");
-	gtk_font_chooser_set_font (GTK_FONT_CHOOSER (item), font);
+	gtk_font_chooser_set_font (prefs->font_sel_button, font);
 	bacon_video_widget_set_subtitle_font (totem->bvw, font);
 	g_free (font);
 }
@@ -112,12 +121,11 @@ font_changed_cb (GSettings *settings, const gchar *key, TotemObject *totem)
 static void
 encoding_changed_cb (GSettings *settings, const gchar *key, TotemObject *totem)
 {
+	TotemPreferencesDialog *prefs = TOTEM_PREFERENCES_DIALOG (totem->prefs);
 	gchar *encoding;
-	GtkComboBox *item;
 
-	item = GTK_COMBO_BOX (POBJ ("subtitle_encoding_combo"));
 	encoding = g_settings_get_string (settings, "subtitle-encoding");
-	totem_subtitle_encoding_set (item, encoding);
+	totem_subtitle_encoding_set (prefs->subtitle_encoding_combo, encoding);
 	bacon_video_widget_set_subtitle_encoding (totem->bvw, encoding);
 	g_free (encoding);
 }
@@ -210,32 +218,55 @@ plugin_button_clicked_cb (GtkButton *button,
 	gtk_window_present (GTK_WINDOW (totem->plugins));
 }
 
+static void
+totem_preferences_dialog_class_init (TotemPreferencesDialogClass *klass)
+{
+	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+	gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/totem/ui/preferences.ui");
+
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, font_sel_button);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_auto_subtitles_checkbutton);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_bright_contr_vbox);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_bright_adjustment);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_bright_scale);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_contrast_adjustment);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_contrast_scale);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_hue_adjustment);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_hue_scale);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_no_deinterlace_checkbutton);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_plugins_button);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_saturation_adjustment);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_saturation_scale);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, tpw_sound_output_combobox);
+	gtk_widget_class_bind_template_child (widget_class, TotemPreferencesDialog, subtitle_encoding_combo);
+
+	gtk_widget_class_bind_template_callback (widget_class, encoding_set_cb);
+	gtk_widget_class_bind_template_callback (widget_class, font_set_cb);
+	gtk_widget_class_bind_template_callback (widget_class, tpw_color_reset_clicked_cb);
+}
+
+static void
+totem_preferences_dialog_init (TotemPreferencesDialog *self)
+{
+	gtk_widget_init_template (GTK_WIDGET (self));
+}
+
 void
 totem_setup_preferences (Totem *totem)
 {
+	TotemPreferencesDialog *prefs;
 	GtkWidget *bvw;
 	guint i, hidden;
 	char *font, *encoding;
-	GObject *item;
-
-	static struct {
-		const char *name;
-		BvwVideoProperty prop;
-		const char *label;
-		const gchar *key;
-		const gchar *adjustment;
-	} props[4] = {
-		{ "tpw_contrast_scale", BVW_VIDEO_CONTRAST, "tpw_contrast_label", "contrast", "tpw_contrast_adjustment" },
-		{ "tpw_saturation_scale", BVW_VIDEO_SATURATION, "tpw_saturation_label", "saturation", "tpw_saturation_adjustment" },
-		{ "tpw_bright_scale", BVW_VIDEO_BRIGHTNESS, "tpw_brightness_label", "brightness", "tpw_bright_adjustment" },
-		{ "tpw_hue_scale", BVW_VIDEO_HUE, "tpw_hue_label", "hue", "tpw_hue_adjustment" }
-	};
 
 	g_return_if_fail (totem->settings != NULL);
 
-	totem->prefs_xml = gtk_builder_new_from_resource ("/org/gnome/totem/ui/preferences.ui");
-	gtk_builder_connect_signals (totem->prefs_xml, totem);
-	totem->prefs = GTK_WIDGET (gtk_builder_get_object (totem->prefs_xml, "totem_preferences_window"));
+	totem->prefs = g_object_new (TOTEM_TYPE_PREFERENCES_DIALOG,
+				     "use-header-bar", 1,
+				     NULL);
+	prefs = TOTEM_PREFERENCES_DIALOG (totem->prefs);
+	prefs->totem = totem;
 
 	gtk_window_set_transient_for (GTK_WINDOW (totem->prefs), GTK_WINDOW(totem->win));
 
@@ -245,73 +276,77 @@ totem_setup_preferences (Totem *totem)
                           G_CALLBACK (gtk_widget_destroyed), &totem->prefs);
 
 	/* Disable deinterlacing */
-	item = POBJ ("tpw_no_deinterlace_checkbutton");
-	g_settings_bind (totem->settings, "disable-deinterlacing", item, "active", G_SETTINGS_BIND_DEFAULT);
+	g_settings_bind (totem->settings, "disable-deinterlacing",
+			 prefs->tpw_no_deinterlace_checkbutton, "active", G_SETTINGS_BIND_DEFAULT);
 	g_settings_bind (totem->settings, "disable-deinterlacing", bvw, "deinterlacing",
 	                 G_SETTINGS_BIND_DEFAULT | G_SETTINGS_BIND_NO_SENSITIVITY | G_SETTINGS_BIND_INVERT_BOOLEAN);
 
 	/* Auto-load subtitles */
-	item = POBJ ("tpw_auto_subtitles_checkbutton");
-	g_settings_bind (totem->settings, "autoload-subtitles", item, "active", G_SETTINGS_BIND_DEFAULT);
+	g_settings_bind (totem->settings, "autoload-subtitles",
+			 prefs->tpw_auto_subtitles_checkbutton, "active", G_SETTINGS_BIND_DEFAULT);
 
 	/* Plugins button */
-	item = POBJ ("tpw_plugins_button");
-	g_signal_connect (G_OBJECT (item), "clicked",
+	g_signal_connect (prefs->tpw_plugins_button, "clicked",
 			  G_CALLBACK (plugin_button_clicked_cb), totem);
 
 	/* Brightness and all */
+	struct {
+		GtkRange *range;
+		BvwVideoProperty prop;
+		const gchar *key;
+		GtkAdjustment *adjustment;
+	} props[4] = {
+		{ prefs->tpw_contrast_scale, BVW_VIDEO_CONTRAST, "contrast", prefs->tpw_contrast_adjustment },
+		{ prefs->tpw_saturation_scale, BVW_VIDEO_SATURATION, "saturation", prefs->tpw_saturation_adjustment },
+		{ prefs->tpw_bright_scale, BVW_VIDEO_BRIGHTNESS, "brightness", prefs->tpw_bright_adjustment },
+		{ prefs->tpw_hue_scale, BVW_VIDEO_HUE, "hue", prefs->tpw_hue_adjustment }
+	};
+
 	hidden = 0;
 	for (i = 0; i < G_N_ELEMENTS (props); i++) {
 		int prop_value;
 
-		item = POBJ (props[i].adjustment);
-		g_settings_bind (totem->settings, props[i].key, item, "value", G_SETTINGS_BIND_DEFAULT);
+		g_settings_bind (totem->settings, props[i].key, props[i].adjustment, "value", G_SETTINGS_BIND_DEFAULT);
 		g_settings_bind (totem->settings, props[i].key, bvw, props[i].key, G_SETTINGS_BIND_DEFAULT | G_SETTINGS_BIND_NO_SENSITIVITY);
 
 		prop_value = bacon_video_widget_get_video_property (totem->bvw, props[i].prop);
 		if (prop_value < 0) {
 			/* The property's unsupported, so hide the widget and its label */
-			item = POBJ (props[i].name);
-			gtk_range_set_value (GTK_RANGE (item), (gdouble) 65535/2);
-			gtk_widget_hide (GTK_WIDGET (item));
+			gtk_range_set_value (props[i].range, (gdouble) 65535/2);
+			gtk_widget_hide (GTK_WIDGET (props[i].range));
 			hidden++;
 		}
 	}
 
 	/* If all the properties have been hidden, hide their section box */
-	if (hidden == G_N_ELEMENTS (props)) {
-		item = POBJ ("tpw_bright_contr_vbox");
-		gtk_widget_hide (GTK_WIDGET (item));
-	}
+	gtk_widget_set_visible (prefs->tpw_bright_contr_vbox, hidden < G_N_ELEMENTS (props));
 
 	/* Sound output type */
-	item = POBJ ("tpw_sound_output_combobox");
 	g_settings_bind (totem->settings, "audio-output-type", bvw, "audio-output-type",
 	                 G_SETTINGS_BIND_DEFAULT | G_SETTINGS_BIND_NO_SENSITIVITY);
-	g_settings_bind_with_mapping (totem->settings, "audio-output-type", item, "active", G_SETTINGS_BIND_DEFAULT,
+	g_settings_bind_with_mapping (totem->settings, "audio-output-type",
+				      prefs->tpw_sound_output_combobox, "active", G_SETTINGS_BIND_DEFAULT,
 	                              (GSettingsBindGetMapping) int_enum_get_mapping, (GSettingsBindSetMapping) int_enum_set_mapping,
 	                              g_type_class_ref (BVW_TYPE_AUDIO_OUTPUT_TYPE), (GDestroyNotify) g_type_class_unref);
 
 	/* Subtitle font selection */
-	item = POBJ ("font_sel_button");
 	font = g_settings_get_string (totem->settings, "subtitle-font");
 	if (*font != '\0') {
-		gtk_font_chooser_set_font (GTK_FONT_CHOOSER (item), font);
+		gtk_font_chooser_set_font (prefs->font_sel_button, font);
 		bacon_video_widget_set_subtitle_font (totem->bvw, font);
 	}
 	g_free (font);
 	g_signal_connect (totem->settings, "changed::subtitle-font", (GCallback) font_changed_cb, totem);
 
 	/* Subtitle encoding selection */
-	item = POBJ ("subtitle_encoding_combo");
-	totem_subtitle_encoding_init (GTK_COMBO_BOX (item));
+	totem_subtitle_encoding_init (prefs->subtitle_encoding_combo);
 	encoding = g_settings_get_string (totem->settings, "subtitle-encoding");
 	/* Make sure the default is UTF-8 */
 	if (*encoding == '\0') {
 		g_free (encoding);
 		encoding = g_strdup ("UTF-8");
 	}
-	totem_subtitle_encoding_set (GTK_COMBO_BOX(item), encoding);
+	totem_subtitle_encoding_set (prefs->subtitle_encoding_combo, encoding);
 	if (encoding && strcasecmp (encoding, "") != 0) {
 		bacon_video_widget_set_subtitle_encoding (totem->bvw, encoding);
 	}
diff --git a/src/totem-preferences.h b/src/totem-preferences.h
index 3fc25f03a..ed9271740 100644
--- a/src/totem-preferences.h
+++ b/src/totem-preferences.h
@@ -29,8 +29,13 @@
 #ifndef TOTEM_PREFERENCES_H
 #define TOTEM_PREFERENCES_H
 
+#include <gtk/gtk.h>
+
 G_BEGIN_DECLS
 
+#define TOTEM_TYPE_PREFERENCES_DIALOG (totem_preferences_dialog_get_type())
+G_DECLARE_FINAL_TYPE (TotemPreferencesDialog, totem_preferences_dialog, TOTEM, PREFERENCES_DIALOG, GtkDialog)
+
 void totem_setup_preferences (Totem *totem);
 
 G_END_DECLS
diff --git a/src/totem-private.h b/src/totem-private.h
index 8e228b166..de6edb42d 100644
--- a/src/totem-private.h
+++ b/src/totem-private.h
@@ -76,7 +76,6 @@ struct _TotemObject {
 	GtkWidget *stack;
 	BaconVideoWidget *bvw;
 	GtkWidget *prefs;
-	GtkBuilder *prefs_xml;
 	GtkWindow *shortcuts_win;
 
 	GtkWidget *grilo;