Improving the resizing by dragging of the render window of the image dispalay plugin

src/rviz/CMakeLists.txt

@@ -122,6 +122,7 @@ add_library(${PROJECT_NAME}
   tool_properties_panel.cpp
   yaml_config_reader.cpp
   yaml_config_writer.cpp
+  image_render_panel.cpp
 
   ${ENV_CONFIG_FILE}
 )

src/rviz/default_plugin/image_display.cpp

@@ -44,7 +44,7 @@
 
 #include "rviz/display_context.h"
 #include "rviz/frame_manager.h"
-#include "rviz/render_panel.h"
+#include "rviz/image_render_panel.h"
 #include "rviz/validate_floats.h"
 
 #include <sensor_msgs/image_encodings.h>
@@ -115,7 +115,7 @@ void ImageDisplay::onInitialize()
     img_scene_node_->attachObject(screen_rect_);
   }
 
-  render_panel_ = new RenderPanel();
+  render_panel_ = new ImageRenderPanel();
   render_panel_->getRenderWindow()->setAutoUpdated(false);
   render_panel_->getRenderWindow()->setActive(false);
 

src/rviz/default_plugin/image_display.h

@@ -39,7 +39,7 @@
 
 #include "rviz/image/image_display_base.h"
 #include "rviz/image/ros_image_texture.h"
-#include "rviz/render_panel.h"
+#include "rviz/image_render_panel.h"
 
 #include "rviz/properties/bool_property.h"
 #include "rviz/properties/float_property.h"
@@ -86,7 +86,7 @@ public Q_SLOTS:
 
   ROSImageTexture texture_;
 
-  RenderPanel* render_panel_;
+  ImageRenderPanel* render_panel_;
 
 private:
   void clear();

src/rviz/image_render_panel.cpp

@@ -0,0 +1,27 @@
+#include "image_render_panel.h"
+
+namespace rviz
+{
+ImageRenderPanel::ImageRenderPanel(QWidget* parent) : RenderPanel(parent)
+{
+}
+
+ImageRenderPanel::~ImageRenderPanel()
+{
+}
+
+void ImageRenderPanel::mouseMoveEvent(QMouseEvent* event)
+{
+  QWidget::mouseMoveEvent(event);
+}
+
+void ImageRenderPanel::mousePressEvent(QMouseEvent* event)
+{
+  QWidget::mousePressEvent(event);
+}
+
+void ImageRenderPanel::mouseReleaseEvent(QMouseEvent* event)
+{
+  QWidget::mouseReleaseEvent(event);
+}
+} // namespace rviz

src/rviz/image_render_panel.h

@@ -0,0 +1,20 @@
+#ifndef RVIZ_IMAGE_RENDER_PANEL_H
+#define RVIZ_IMAGE_RENDER_PANEL_H
+
+#include "rviz/render_panel.h"
+namespace rviz
+{
+class ImageRenderPanel : public RenderPanel
+{
+public:
+  ImageRenderPanel(QWidget* parent = nullptr);
+  ~ImageRenderPanel() override;
+
+protected:
+  void mouseMoveEvent(QMouseEvent* event) override;
+  void mousePressEvent(QMouseEvent* event) override;
+  void mouseReleaseEvent(QMouseEvent* event) override;
+};
+} // namespace rviz
+
+#endif // RVIZ_IMAGE_RENDER_PANEL_H