I'm trying to connect my web cam in a ROS project on ubuntu mate and Raspberry PI.
-
Hello guys I'm trying to connect a Web cam in a robot project with ROS. When I press the button from main Ui I've no image and I've got this message in terminal.
QWidget::paintEngine : Should not longer be called.Here's the code
#include "Cameradialog.h" #include "ui_Cameradialog.h" #include <QCamera> #include <QtMultimediaWidgets/QCameraViewfinder> #include <QCameraImageCapture> #include <QVBoxLayout> #include <QMenu> #include <QAction> #include <QScrollArea> CameraDialog::CameraDialog(QWidget *parent) : QWidget(parent), ui(new Ui::CameraDialog) { ui->setupUi(this); // Camera init m_Camera = new QCamera(this); m_CameraViewFinder = new QCameraViewfinder(this); m_CameraImapgeCapture = new QCameraImageCapture(m_Camera, this); m_Layout = new QVBoxLayout; m_Camera->setViewfinder(m_CameraViewFinder); m_Layout->addWidget(m_CameraViewFinder); m_Layout->setMargin(0); ui->scrollArea->setLayout(m_Layout); } CameraDialog::~CameraDialog() { delete ui; delete m_Camera; delete m_CameraViewFinder; delete m_CameraImapgeCapture; delete m_Layout; } void CameraDialog::on_m_CameraStartButon_clicked() { m_Camera->start(); }And here's is the CMakeLists.txt if it needed.
############################################################################## # CMake ############################################################################## cmake_minimum_required(VERSION 2.8.0) project(Monster_Truck_UI) set(CMAKE_AUTOUIC ON) ############################################################################## # Catkin ############################################################################## # qt_build provides the qt cmake glue, roscpp the comms for a default talker find_package(catkin REQUIRED COMPONENTS qt_build roscpp) include_directories(${catkin_INCLUDE_DIRS}) # Use this to define what the package will export (e.g. libs, headers). # Since the default here is to produce only a binary, we don't worry about # exporting anything. catkin_package() ############################################################################## # Qt Environment ############################################################################## # this comes from qt_build's qt-ros.cmake which is automatically # included via the dependency call in package.xml ############################################################################## # Sections ############################################################################## set(CMAKE_AUTOMOC ON) find_package(Qt5 REQUIRED COMPONENTS Core Gui Widgets Multimedia MultimediaWidgets ) QT5_ADD_RESOURCES(QT_RESOURCES_CPP ${QT_RESOURCES}) QT5_WRAP_UI(QT_FORMS_HPP ${QT_FORMS})############################################################################## # Sources ############################################################################## include_directories( ${Qt5Core_INCLUDE_DIRS} ${Qt5Gui_INCLUDE_DIRS} ${Qt5Widgets_INCLUDE_DIRS} ${Qt5Multimedia_INCLUDE_DIRS} ) set(QT_SOURCES src/main.cpp src/mainwindow.cpp src/mainwindow.h src/mainwindow.ui src/Events/keyboard_events.h src/Manual_Window/manual_window.cpp src/Manual_Window/manual_window.h src/Manual_Window/manual_window.ui src/Camera_Window/Cameradialog.h src/Camera_Window/Cameradialog.cpp src/Camera_Window/Cameradialog.ui #ROS SRC src/ROS_src/_ros.h src/ROS_src/_ros.cpp src/ROS_src/rviz.h src/ROS_src/rviz.cpp ) ############################################################################## # Binaries ############################################################################## add_executable(Monster_Truck_UI ${QT_SOURCES} ${QT_RESOURCES_CPP} ${QT_FORMS_HPP} ${QT_MOC_HPP}) target_link_libraries(Monster_Truck_UI ${QT_LIBRARIES} ${catkin_LIBRARIES} Qt5::Core Qt5::Widgets Qt5::Multimedia Qt5::MultimediaWidgets) install(TARGETS Monster_Truck_UI RUNTIME DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION})