Add toolbar toggle buttons for scale-to-fit/filter

fastiv.c

@@ -57,6 +57,7 @@ exit_fatal(const gchar *format, ...)
 // TODO(p): Add a toggle for a checkerboard background.
 // TODO(p): Implement commented-out actions.
 #define B make_toolbar_button
+#define T make_toolbar_toggle
 #define TOOLBAR(XX) \
 	XX(BROWSE,        B("view-grid-symbolic", "Browse")) \
 	XX(FILE_PREVIOUS, B("go-previous-symbolic", "Previous file")) \
@@ -77,11 +78,11 @@ exit_fatal(const gchar *format, ...)
 	XX(SCALE,         gtk_label_new("100%")) \
 	XX(MINUS,         B("zoom-out-symbolic", "Zoom out")) \
 	XX(ONE,           B("zoom-original-symbolic", "Original size")) \
-	/* XX(FIT,        B("zoom-fit-best-symbolic", "Scale to fit")) */ \
+	XX(FIT,           T("zoom-fit-best-symbolic", "Scale to fit")) \
 	XX(S4,            make_separator()) \
 	/* XX(PIN,        B("view-pin-symbolic", "Keep view configuration")) */ \
 	/* Or perhaps "blur-symbolic", also in the extended set. */ \
-	/* XX(SMOOTH,     B("blend-tool-symbolic", "Smooth scaling")) */ \
+	XX(SMOOTH,        T("blend-tool-symbolic", "Smooth scaling")) \
 	/* XX(COLOR,      B("preferences-color-symbolic", "Color management")) */ \
 	XX(SAVE,          B("document-save-as-symbolic", "Save as...")) \
 	XX(PRINT,         B("document-print-symbolic", "Print...")) \
@@ -608,6 +609,21 @@ make_toolbar_button(const gchar *symbolic, const gchar *tooltip)
 	return button;
 }
 
+static GtkWidget *
+make_toolbar_toggle(const gchar *symbolic, const gchar *tooltip)
+{
+	GtkWidget *button = gtk_toggle_button_new();
+	gtk_button_set_image(GTK_BUTTON(button),
+		gtk_image_new_from_icon_name(symbolic, GTK_ICON_SIZE_BUTTON));
+	gtk_widget_set_tooltip_text(button, tooltip);
+//	gtk_widget_set_sensitive(button, FALSE);
+	gtk_widget_set_focus_on_click(button, FALSE);
+
+	gtk_style_context_add_class(
+		gtk_widget_get_style_context(button), GTK_STYLE_CLASS_FLAT);
+	return button;
+}
+
 static GtkWidget *
 make_separator(void)
 {
@@ -620,7 +636,7 @@ make_separator(void)
 }
 
 static void
-on_notify_scale(
+on_notify_view_scale(
 	GObject *object, GParamSpec *param_spec, G_GNUC_UNUSED gpointer user_data)
 {
 	double scale = 0;
@@ -629,16 +645,38 @@ on_notify_scale(
 	gchar *scale_str = g_strdup_printf("%.0f%%", round(scale * 100));
 	gtk_label_set_text(GTK_LABEL(g.toolbar[TOOLBAR_SCALE]), scale_str);
 	g_free(scale_str);
+
+	// FIXME: The label doesn't immediately assume its new width.
 }
 
 static void
-toolbar_connect(int index, GCallback callback)
+on_notify_view_boolean(
+	GObject *object, GParamSpec *param_spec, gpointer user_data)
 {
-	g_signal_connect_swapped(g.toolbar[index], "clicked", callback, NULL);
+	gboolean b = FALSE;
+	g_object_get(object, g_param_spec_get_name(param_spec), &b, NULL);
+	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(user_data), b);
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+static void
+on_toolbar_view_toggle(GtkToggleButton *button, const char *property)
+{
+	g_object_set(g.view, property, gtk_toggle_button_get_active(button), NULL);
 }
 
 static void
-on_command(intptr_t command)
+toolbar_toggler(int index, const char *property)
+{
+	g_signal_connect(g.toolbar[index], "toggled",
+		G_CALLBACK(on_toolbar_view_toggle), (gpointer) property);
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+static void
+on_toolbar_view_command(intptr_t command)
 {
 	fiv_view_command(FIV_VIEW(g.view), command);
 }
@@ -647,7 +685,15 @@ static void
 toolbar_command(int index, FivViewCommand command)
 {
 	g_signal_connect_swapped(g.toolbar[index], "clicked",
-		G_CALLBACK(on_command), (void *) (intptr_t) command);
+		G_CALLBACK(on_toolbar_view_command), (void *) (intptr_t) command);
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+static void
+toolbar_connect(int index, GCallback callback)
+{
+	g_signal_connect_swapped(g.toolbar[index], "clicked", callback, NULL);
 }
 
 // TODO(p): The toolbar should not be visible in fullscreen,
@@ -686,12 +732,21 @@ make_view_toolbar(void)
 	toolbar_command(TOOLBAR_PLUS,          FIV_VIEW_COMMAND_ZOOM_IN);
 	toolbar_command(TOOLBAR_MINUS,         FIV_VIEW_COMMAND_ZOOM_OUT);
 	toolbar_command(TOOLBAR_ONE,           FIV_VIEW_COMMAND_ZOOM_1);
+	toolbar_toggler(TOOLBAR_FIT,           "scale-to-fit");
+	toolbar_toggler(TOOLBAR_SMOOTH,        "filter");
 	toolbar_command(TOOLBAR_PRINT,         FIV_VIEW_COMMAND_PRINT);
 	toolbar_command(TOOLBAR_SAVE,          FIV_VIEW_COMMAND_SAVE_PAGE);
 	toolbar_command(TOOLBAR_LEFT,          FIV_VIEW_COMMAND_ROTATE_LEFT);
 	toolbar_command(TOOLBAR_MIRROR,        FIV_VIEW_COMMAND_MIRROR);
 	toolbar_command(TOOLBAR_RIGHT,         FIV_VIEW_COMMAND_ROTATE_RIGHT);
 	toolbar_connect(TOOLBAR_FULLSCREEN,    G_CALLBACK(toggle_fullscreen));
+
+	g_signal_connect(g.view, "notify::scale-to-fit",
+		G_CALLBACK(on_notify_view_boolean), g.toolbar[TOOLBAR_FIT]);
+	g_signal_connect(g.view, "notify::filter",
+		G_CALLBACK(on_notify_view_boolean), g.toolbar[TOOLBAR_SMOOTH]);
+	g_object_notify(G_OBJECT(g.view), "scale-to-fit");
+	g_object_notify(G_OBJECT(g.view), "filter");
 	return view_toolbar;
 }
 
@@ -786,7 +841,7 @@ main(int argc, char *argv[])
 	g_signal_connect(g.view, "button-press-event",
 		G_CALLBACK(on_button_press_view), NULL);
 	g_signal_connect(g.view, "notify::scale",
-		G_CALLBACK(on_notify_scale), NULL);
+		G_CALLBACK(on_notify_view_scale), NULL);
 	gtk_container_add(GTK_CONTAINER(view_scroller), g.view);
 
 	// Maybe our custom widgets should derive colours from the theme instead.

fiv-view.c

@@ -122,6 +122,25 @@ fiv_view_get_property(
 	}
 }
 
+static void
+fiv_view_set_property(
+	GObject *object, guint property_id, const GValue *value, GParamSpec *pspec)
+{
+	FivView *self = FIV_VIEW(object);
+	switch (property_id) {
+	case PROP_SCALE_TO_FIT:
+		if (self->scale_to_fit != g_value_get_boolean(value))
+			fiv_view_command(self, FIV_VIEW_COMMAND_TOGGLE_SCALE_TO_FIT);
+		break;
+	case PROP_FILTER:
+		if (self->filter != g_value_get_boolean(value))
+			fiv_view_command(self, FIV_VIEW_COMMAND_TOGGLE_FILTER);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
+	}
+}
+
 static void
 get_surface_dimensions(FivView *self, double *width, double *height)
 {
@@ -396,16 +415,17 @@ fiv_view_button_press_event(GtkWidget *widget, GdkEventButton *event)
 	return FALSE;
 }
 
-#define SCALE_STEP 1.4
+#define SCALE_STEP 1.25
 
 static gboolean
 set_scale_to_fit(FivView *self, bool scale_to_fit)
 {
+	if (self->scale_to_fit != scale_to_fit) {
 		self->scale_to_fit = scale_to_fit;
-
-	gtk_widget_queue_resize(GTK_WIDGET(self));
 		g_object_notify_by_pspec(
 			G_OBJECT(self), view_properties[PROP_SCALE_TO_FIT]);
+		gtk_widget_queue_resize(GTK_WIDGET(self));
+	}
 	return TRUE;
 }
 
@@ -413,8 +433,8 @@ static gboolean
 set_scale(FivView *self, double scale)
 {
 	self->scale = scale;
-	g_object_notify_by_pspec(
+	g_object_notify_by_pspec(G_OBJECT(self), view_properties[PROP_SCALE]);
-		G_OBJECT(self), view_properties[PROP_SCALE]);
+	gtk_widget_queue_resize(GTK_WIDGET(self));
 	return set_scale_to_fit(self, false);
 }
 
@@ -750,14 +770,9 @@ fiv_view_key_press_event(GtkWidget *widget, GdkEventKey *event)
 		return command(self, FIV_VIEW_COMMAND_ZOOM_OUT);
 
 	case GDK_KEY_x:  // Inspired by gThumb.
-		return set_scale_to_fit(self, !self->scale_to_fit);
+		return command(self, FIV_VIEW_COMMAND_TOGGLE_SCALE_TO_FIT);
-
 	case GDK_KEY_i:
-		self->filter = !self->filter;
+		return command(self, FIV_VIEW_COMMAND_TOGGLE_FILTER);
-		g_object_notify_by_pspec(
-			G_OBJECT(self), view_properties[PROP_FILTER]);
-		gtk_widget_queue_draw(widget);
-		return TRUE;
 
 	case GDK_KEY_less:
 		return command(self, FIV_VIEW_COMMAND_ROTATE_LEFT);
@@ -785,16 +800,17 @@ fiv_view_class_init(FivViewClass *klass)
 	GObjectClass *object_class = G_OBJECT_CLASS(klass);
 	object_class->finalize = fiv_view_finalize;
 	object_class->get_property = fiv_view_get_property;
+	object_class->set_property = fiv_view_set_property;
 
 	view_properties[PROP_SCALE] = g_param_spec_double(
 		"scale", "Scale", "Zoom level",
 		0, G_MAXDOUBLE, 1.0, G_PARAM_READABLE);
 	view_properties[PROP_SCALE_TO_FIT] = g_param_spec_boolean(
 		"scale-to-fit", "Scale to fit", "Scale images down to fit the window",
-		TRUE, G_PARAM_READABLE);
+		TRUE, G_PARAM_READWRITE);
 	view_properties[PROP_FILTER] = g_param_spec_boolean(
 		"filter", "Use filtering", "Scale images smoothly",
-		TRUE, G_PARAM_READABLE);
+		TRUE, G_PARAM_READWRITE);
 	g_object_class_install_properties(
 		object_class, N_PROPERTIES, view_properties);
 
@@ -903,6 +919,10 @@ fiv_view_command(FivView *self, FivViewCommand command)
 	break; case FIV_VIEW_COMMAND_FRAME_NEXT:
 		frame_step(self, +1);
 
+	break; case FIV_VIEW_COMMAND_TOGGLE_FILTER:
+		self->filter = !self->filter;
+		g_object_notify_by_pspec(G_OBJECT(self), view_properties[PROP_FILTER]);
+		gtk_widget_queue_draw(widget);
 	break; case FIV_VIEW_COMMAND_PRINT:
 		print(self);
 	break; case FIV_VIEW_COMMAND_SAVE_PAGE:
@@ -914,5 +934,7 @@ fiv_view_command(FivView *self, FivViewCommand command)
 		set_scale(self, self->scale / SCALE_STEP);
 	break; case FIV_VIEW_COMMAND_ZOOM_1:
 		set_scale(self, 1.0);
+	break; case FIV_VIEW_COMMAND_TOGGLE_SCALE_TO_FIT:
+		set_scale_to_fit(self, !self->scale_to_fit);
 	}
 }

fiv-view.h

@@ -40,12 +40,14 @@ typedef enum _FivViewCommand {
 	FIV_VIEW_COMMAND_FRAME_NEXT,
 	// Going to the end frame makes no sense, wrap around if needed.
 
+	FIV_VIEW_COMMAND_TOGGLE_FILTER,
 	FIV_VIEW_COMMAND_PRINT,
 	FIV_VIEW_COMMAND_SAVE_PAGE,
 
 	FIV_VIEW_COMMAND_ZOOM_IN,
 	FIV_VIEW_COMMAND_ZOOM_OUT,
-	FIV_VIEW_COMMAND_ZOOM_1
+	FIV_VIEW_COMMAND_ZOOM_1,
+	FIV_VIEW_COMMAND_TOGGLE_SCALE_TO_FIT,
 } FivViewCommand;
 
 /// Execute a user action.