Fix #26: Implement callback function for auto naming button

gds-render-gui.c

@@ -586,6 +586,34 @@ static void on_select_all_layers_clicked(GtkWidget *button, gpointer user_data)
 	layer_selector_select_all_layers(gui->layer_selector, TRUE);
 }
 
+static void auto_naming_clicked(GtkWidget *button, gpointer user_data)
+{
+	GdsRenderGui *gui;
+	GtkDialog *dialog;
+	gboolean overwrite;
+	int dialog_result;
+	(void)button;
+
+	gui = RENDERER_GUI(user_data);
+
+	/* Ask for overwrite */
+	dialog = GTK_DIALOG(gtk_message_dialog_new(gui->main_window, GTK_DIALOG_USE_HEADER_BAR, GTK_MESSAGE_QUESTION,
+						   GTK_BUTTONS_YES_NO, "Overwrite existing layer names?"));
+	dialog_result = gtk_dialog_run(dialog);
+	switch (dialog_result) {
+	case GTK_RESPONSE_YES:
+		overwrite = TRUE;
+		break;
+	case GTK_RESPONSE_NO: /* Expected fallthrough */
+	default:
+		overwrite = FALSE;
+		break;
+	}
+	gtk_widget_destroy(GTK_WIDGET(dialog));
+
+	layer_selector_auto_name_layers(gui->layer_selector, overwrite);
+}
+
 GtkWindow *gds_render_gui_get_main_window(GdsRenderGui *gui)
 {
 	return gui->main_window;
@@ -601,6 +629,7 @@ static void gds_render_gui_init(GdsRenderGui *self)
 	GtkWidget *sort_down_button;
 	GtkWidget *activity_bar_box;
 	GtkWidget *auto_color_button;
+	GtkWidget *auto_naming_button;
 
 	main_builder = gtk_builder_new_from_resource("/gui/main.glade");
 
@@ -672,6 +701,10 @@ static void gds_render_gui_init(GdsRenderGui *self)
 	self->select_all_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-select-all"));
 	g_signal_connect(self->select_all_button, "clicked", G_CALLBACK(on_select_all_layers_clicked), self);
 
+	/* Setup auto naming button */
+	auto_naming_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-auto-name"));
+	g_signal_connect(auto_naming_button, "clicked", G_CALLBACK(auto_naming_clicked), self);
+
 	g_object_unref(main_builder);
 
 	/* Setup default button sensibility data */

include/gds-render/layer/layer-selector.h

@@ -103,10 +103,21 @@ void layer_selector_select_all_layers(LayerSelector *layer_selector, gboolean se
  * @brief Apply colors from palette to all layers. Aditionally set alpha
  * @param layer_selector LayerSelector object
  * @param palette Color palette to use
- * @param global_alpha Additional alpha value that is applied to all layers
+ * @param global_alpha Additional alpha value that is applied to all layers. Must be > 0
  */
 void layer_selector_auto_color_layers(LayerSelector *layer_selector, ColorPalette *palette, double global_alpha);
 
+/**
+ * @brief Auto name all layers in the layer selector.
+ *
+ * This functions sets the name of the layer equal to its number.
+ * The \p overwrite parameter specifies if already set layer names are overwritten.
+ *
+ * @param layer_selector LayerSelector
+ * @param overwrite Overwrite existing layer names
+ */
+void layer_selector_auto_name_layers(LayerSelector *layer_selector, gboolean overwrite);
+
 G_END_DECLS
 
 #endif /* __LAYER_SELECTOR_H__ */

layer/layer-selector.c

@@ -857,4 +857,34 @@ ret_free_le_list:
 	g_list_free(le_list);
 }
 
+void layer_selector_auto_name_layers(LayerSelector *layer_selector, gboolean overwrite)
+{
+	GList *le_list;
+	GList *le_list_ptr;
+	LayerElement *le;
+	const char *old_layer_name;
+	GString *new_layer_name;
+
+	g_return_if_fail(LAYER_IS_SELECTOR(layer_selector));
+
+	new_layer_name = g_string_new_len(NULL, 10);
+	le_list = gtk_container_get_children(GTK_CONTAINER(layer_selector->list_box));
+
+	for (le_list_ptr = le_list; le_list_ptr != NULL; le_list_ptr = g_list_next(le_list_ptr)) {
+		le = LAYER_ELEMENT(le_list_ptr->data);
+		if (!le)
+			continue;
+		old_layer_name = layer_element_get_name(le);
+
+		/* Check if layer name is empty or may be overwritten */
+		if (!old_layer_name || *old_layer_name == '\0' || overwrite) {
+			g_string_printf(new_layer_name, "Layer %d", layer_element_get_layer(le));
+			layer_element_set_name(le, new_layer_name->str);
+		}
+	}
+
+	g_string_free(new_layer_name, TRUE);
+	g_list_free(le_list);
+}
+
 /** @} */

resources/main.glade

@@ -2,6 +2,11 @@
 <!-- Generated with glade 3.22.1 -->
 <interface>
   <requires lib="gtk+" version="3.20"/>
+  <object class="GtkImage" id="auto-name-img">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-edit</property>
+  </object>
   <object class="GtkImage" id="color-img">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
@@ -234,6 +239,20 @@
                         <property name="position">3</property>
                       </packing>
                     </child>
+                    <child>
+                      <object class="GtkButton" id="button-auto-name">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="image">auto-name-img</property>
+                        <property name="always_show_image">True</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">4</property>
+                      </packing>
+                    </child>
                   </object>
                   <packing>
                     <property name="expand">False</property>