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{{DISPLAYTITLE:Desenvolvimento/ Tutoriais/Usando o KXmlGuiWindow.}}<languages/> {{TutorialBrowser| series=Tutorial para Iniciantes| name=Como usar a KXmlGuiWindow| pre=[[Development/Tutorials/First_program|Tutorial 1 - Hello World]]| next=[[Development/Tutorials/Using_Actions|Tutorial 3 - QActions and XMLGUI]]| reading={{class|KXmlGuiWindow}} }} <span id="Abstract"></span> ==Resumo== Este tutorial incrementa o [[Development/Tutorials/First_program/KF5|First Program Tutorial]] e apresentará a classe {{class|KXmlGuiWindow}}. No tutorial anterior o programa fez aparecer uma caixa de diálogo, então vamos dar passos no sentido de criar um aplicativo funcional. [[image:tutorial2-kf5.png|frame|center]] ==KXmlGuiWindow== A {{class|KXmlGuiWindow}} fornece uma visualização completa da janela principal com menus, barras de ferramentas, uma barra de status e uma área principal no centro para um widget grande. Por exemplo, o menu de ajuda é predefinido. A maioria dos aplicativos KDE deriva dessa classe, pois fornece uma maneira fácil de definir layouts de menus e barras de ferramentas por meio de arquivos XML (essa tecnologia é chamada XMLGUI e faz parte da estrutura KF5::XmlGui). Embora não utilizemos XMLGUI ''neste'' tutorial, vamos usá-lo no próximo. Para ter uma KXmlGuiWindow útil, precisamos criar uma subclasse. Então, criamos dois arquivos, um <tt>mainwindow.cpp</tt> e um <tt>mainwindow.h</tt> que conterão nosso código. ===mainwindow.h=== <syntaxhighlight lang="cpp-qt"> #ifndef MAINWINDOW_H #define MAINWINDOW_H #include <KXmlGuiWindow> class KTextEdit; class MainWindow : public KXmlGuiWindow { public: explicit MainWindow(QWidget *parent = nullptr); private: KTextEdit* textArea; }; #endif </syntaxhighlight> Primeiro derivamos uma subclasse KXmlGuiWindow com <tt>class MainWindow : public KXmlGuiWindow</tt> e depois declaramos o construtor com <tt>MainWindow(QWidget * parent = nullptr); </tt>. E, finalmente, declaramos um ponteiro para o objeto que vai compor a maior parte do nosso programa. O {{class|KTextEdit}} é um widget genérico de editor de texto rico com alguns detalhes, como ocultar automaticamente o cursor. ===mainwindow.cpp=== <syntaxhighlight lang="cpp-qt"> #include "mainwindow.h" #include <KTextEdit> MainWindow::MainWindow(QWidget *parent) : KXmlGuiWindow(parent) { textArea = new KTextEdit(); setCentralWidget(textArea); setupGUI(); } </syntaxhighlight> Primeiramente, é claro, temos que incluir o arquivo de cabeçalho que contém a declaração de classe. Inicializamos nosso editor de texto com um objeto e usamos a função interna do KXmlGuiWindow setCentralWidget(), que informa ao KXmlGuiWindow o que deve aparecer na seção central da janela. Finalmente, o KXmlGuiWindow::setupGUI() é chamado, o que faz um monte de coisas nos bastidores e cria as barras de menu padrão(Configurações, Ajuda). ==Back to main.cpp== Para realmente executar esta janela, precisamos adicionar algumas linhas em main.cpp: ===main.cpp=== <syntaxhighlight lang="cpp-qt"> #include <cstdlib> #include <QApplication> #include <QCommandLineParser> #include <KAboutData> #include <KLocalizedString> #include "mainwindow.h" int main (int argc, char *argv[]) { QApplication app(argc, argv); KLocalizedString::setApplicationDomain("tutorial2"); KAboutData aboutData( // The program name used internally. (componentName) QStringLiteral("tutorial2"), // A displayable program name string. (displayName) i18n("Tutorial 2"), // The program version string. (version) QStringLiteral("1.0"), // Short description of what the app does. (shortDescription) i18n("A simple text area"), // The license this code is released under KAboutLicense::GPL, // Copyright Statement (copyrightStatement = QString()) i18n("(c) 2015"), // Optional text shown in the About box. // Can contain any information desired. (otherText) i18n("Some text..."), // The program homepage string. (homePageAddress = QString()) QStringLiteral("http://example.com/"), // The bug report email address // (bugsEmailAddress = QLatin1String("submit@bugs.kde.org") QStringLiteral("submit@bugs.kde.org")); aboutData.addAuthor(i18n("Name"), i18n("Task"), QStringLiteral("your@email.com"), QStringLiteral("http://your.website.com"), QStringLiteral("OSC Username")); KAboutData::setApplicationData(aboutData); QCommandLineParser parser; aboutData.setupCommandLine(&parser); parser.process(app); aboutData.processCommandLine(&parser); MainWindow* window = new MainWindow(); window->show(); return app.exec(); } </syntaxhighlight> Novamente, incluímos nosso novo arquivo de cabeçalho para criar nosso objeto MainWindow, que então exibimos. ==CMake== A melhor maneira de criar o programa é usar o CMake. Nós adicionamos <tt>mainwindow.cpp</tt> à lista de fontes, incluímos as estruturas XmlGui e TextWidgets (para o KTextEdit) e substituímos todo o texto <tt>tutorial1</tt> por <tt>tutorial2</tt>. ===CMakeLists.txt=== <syntaxhighlight lang="cmake"> cmake_minimum_required(VERSION 3.0) project (tutorial2) set(QT_MIN_VERSION "5.3.0") set(KF5_MIN_VERSION "5.2.0") find_package(ECM 1.0.0 REQUIRED NO_MODULE) set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake) include(KDEInstallDirs) include(KDECMakeSettings) include(KDECompilerSettings NO_POLICY_SCOPE) include(FeatureSummary) find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Core # QCommandLineParser, QStringLiteral Widgets # QApplication ) find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS CoreAddons # KAboutData I18n # KLocalizedString XmlGui # KXmlGuiWindow TextWidgets # KTextEdit ) feature_summary(WHAT ALL INCLUDE_QUIET_PACKAGES FATAL_ON_MISSING_REQUIRED_PACKAGES) set(tutorial2_SRCS main.cpp mainwindow.cpp) add_executable(tutorial2 ${tutorial2_SRCS}) target_link_libraries(tutorial2 Qt5::Widgets KF5::CoreAddons KF5::I18n KF5::XmlGui KF5::TextWidgets ) install(TARGETS tutorial2 ${KDE_INSTALL_TARGETS_DEFAULT_ARGS}) </syntaxhighlight> === Compilar e executar === A melhor maneira de compilar, linkar e executar é [[Getting_Started/Build|configurar um ambiente de compilação correto]]. Mas, para um tutorial simples como este, basta criar um diretório de compilação e compilar a partir daí. Este comando faz tudo isso em uma linha: <syntaxhighlight lang="bash"> mkdir build && cd build && cmake .. && make && ./tutorial2 </syntaxhighlight> ==Adiante== Agora você pode seguir para [[Development/Tutorials/Using_Actions|Usando Actions]]. [[Category:C++]]
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