Fix logo in nav2 panel (ros-navigation#4505)

* Fix logo in nav2 panel

Signed-off-by: Alberto Tudela <ajtudela@gmail.com>

* Move icon

Signed-off-by: Alberto Tudela <ajtudela@gmail.com>

---------

Signed-off-by: Alberto Tudela <ajtudela@gmail.com>

Author: ajtudela

doc/nav2_logo_small.png renamed to nav2_rviz_plugins/icons/classes/nav2_logo_small.png

@@ -178,7 +178,6 @@ private Q_SLOTS:
   QState * paused_wp_{nullptr};
   QState * resumed_wp_{nullptr};
 
-  QImage * image_{nullptr};
   QLabel * imgDisplayLabel_{nullptr};
 
   // The following states are added to allow for the state of the button to only expose reset

nav2_rviz_plugins/include/nav2_rviz_plugins/nav2_panel.hpp

@@ -30,6 +30,7 @@
 #include "nav2_rviz_plugins/goal_common.hpp"
 #include "nav2_rviz_plugins/utils.hpp"
 #include "rviz_common/display_context.hpp"
+#include "rviz_common/load_resource.hpp"
 #include "ament_index_cpp/get_package_share_directory.hpp"
 #include "yaml-cpp/yaml.h"
 #include "geometry_msgs/msg/pose2_d.hpp"
@@ -523,9 +524,9 @@ Nav2Panel::Nav2Panel(QWidget * parent)
   QVBoxLayout * group_box_layout = new QVBoxLayout;
 
   QGroupBox * groupBox = new QGroupBox(tr("Tools for WP-Following"));
-  image_ = new QImage("src/navigation2/doc/nav2_logo_small.png");
   imgDisplayLabel_ = new QLabel("");
-  imgDisplayLabel_->setPixmap(QPixmap::fromImage(*image_));
+  imgDisplayLabel_->setPixmap(
+    rviz_common::loadPixmap("package://nav2_rviz_plugins/icons/classes/nav2_logo_small.png"));
 
   status_layout->addWidget(navigation_status_indicator_);
   status_layout->addWidget(localization_status_indicator_);