C++ GUI Qt 编程（第二版）第8章 Diagram_2(实现主对话框)

  现在要加上餐单和浮动对话框的快捷菜单，首先把你要用到的图标放到一个文件夹里面，后单击File and Class 选项中QT选项在你的右侧选择Qt Resource file 按照提示就可以。不会的参考以前章节的文章。

main.cpp的源代码始终不变，现在我们要在上一次的代码中添加一写代码（蓝色）

Diagramwindow.h的源代码为：

#ifndef DIAGRAM_H

#define DIAGRAM_H

#include<QMainWindow>

class QAction;

class QGraphicsItem;

class QGraphicsScene;

class QGraphicsView;

class Diagram : public QMainWindow

{

    Q_OBJECT

public:

    Diagram();

private:

  void createActions();

    void createMenus();

    void createToolBars();

    QMenu *fileMenu;

    QMenu *editMenu;

    QToolBar *editToolBar;

    QAction *exitAction;

    QAction *addNodeAction;

    QAction *addLinkAction;

    QAction *deleteAction;

    QAction *cutAction;

    QAction *copyAction;

    QAction *pasteAction;

    QAction *bringToFrontAction;

    QAction *sendToBackAction;

    QAction *propertiesAction;

    QGraphicsScene *scene;

    QGraphicsView *view;

};

#endif // DIAGRAM_H

Diagramwindow.cpp的源代码为：

#include<QtGui>

#include "Diagram.h"

Diagram::Diagram()

{

    scene = new QGraphicsScene(0, 0, 600, 500); new a scene

    view = new QGraphicsView;new a view

    view->setScene(scene);set the vscene in the view

    view->setDragMode(QGraphicsView::RubberBandDrag);set the view mode

    view->setRenderHints(QPainter::Antialiasing

                         | QPainter::TextAntialiasing);

    view->setContextMenuPolicy(Qt::ActionsContextMenu);

    setCentralWidget(view);

    createActions();

    createMenus();

    createToolBars();

}

void Diagram::createActions()

{

    exitAction = new QAction(tr("E&xit"), this);

    exitAction->setShortcut(tr("Ctrl+Q"));

    connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));

    addNodeAction = new QAction(tr("Add &Node"), this);

    addNodeAction->setIcon(QIcon(":/images/node.png"));

    addNodeAction->setShortcut(tr("Ctrl+N"));

    connect(addNodeAction, SIGNAL(triggered()), this, SLOT(addNode()));

    addLinkAction = new QAction(tr("Add &Link"), this);

    addLinkAction->setIcon(QIcon(":/images/link.png"));

    addLinkAction->setShortcut(tr("Ctrl+L"));

    connect(addLinkAction, SIGNAL(triggered()), this, SLOT(addLink()));

    deleteAction = new QAction(tr("&Delete"), this);

    deleteAction->setIcon(QIcon(":/images/delete.png"));

    deleteAction->setShortcut(tr("Del"));

    connect(deleteAction, SIGNAL(triggered()), this, SLOT(del()));

    cutAction = new QAction(tr("Cu&t"), this);

    cutAction->setIcon(QIcon(":/images/cut.png"));

    cutAction->setShortcut(tr("Ctrl+X"));

    connect(cutAction, SIGNAL(triggered()), this, SLOT(cut()));

    copyAction = new QAction(tr("&Copy"), this);

    copyAction->setIcon(QIcon(":/images/copy.png"));

    copyAction->setShortcut(tr("Ctrl+C"));

    connect(copyAction, SIGNAL(triggered()), this, SLOT(copy()));

    pasteAction = new QAction(tr("&Paste"), this);

    pasteAction->setIcon(QIcon(":/images/paste.png"));

    pasteAction->setShortcut(tr("Ctrl+V"));

    connect(pasteAction, SIGNAL(triggered()), this, SLOT(paste()));

    bringToFrontAction = new QAction(tr("Bring to &Front"), this);

    bringToFrontAction->setIcon(QIcon(":/images/bringtofront.png"));

    connect(bringToFrontAction, SIGNAL(triggered()),

            this, SLOT(bringToFront()));

    sendToBackAction = new QAction(tr("&Send to Back"), this);

    sendToBackAction->setIcon(QIcon(":/images/sendtoback.png"));

    connect(sendToBackAction, SIGNAL(triggered()),

            this, SLOT(sendToBack()));

    propertiesAction = new QAction(tr("P&roperties..."), this);

    connect(propertiesAction, SIGNAL(triggered()),

            this, SLOT(properties()));

}

void Diagram::createMenus()

{

    fileMenu = menuBar()->addMenu(tr("&File"));

    fileMenu->addAction(exitAction);

    editMenu = menuBar()->addMenu(tr("&Edit"));

    editMenu->addAction(addNodeAction);

    editMenu->addAction(addLinkAction);

    editMenu->addAction(deleteAction);

    editMenu->addSeparator();

    editMenu->addAction(cutAction);

    editMenu->addAction(copyAction);

    editMenu->addAction(pasteAction);

    editMenu->addSeparator();

    editMenu->addAction(bringToFrontAction);

    editMenu->addAction(sendToBackAction);

    editMenu->addSeparator();

    editMenu->addAction(propertiesAction);

}

void Diagram::createToolBars()

{

    editToolBar = addToolBar(tr("Edit"));

    editToolBar->addAction(addNodeAction);

    editToolBar->addAction(addLinkAction);

    editToolBar->addAction(deleteAction);

    editToolBar->addSeparator();

    editToolBar->addAction(cutAction);

    editToolBar->addAction(copyAction);

    editToolBar->addAction(pasteAction);

    editToolBar->addSeparator();

    editToolBar->addAction(bringToFrontAction);

    editToolBar->addAction(sendToBackAction);

}

现在编译就可以发现我的主程序有点结果比较丰满了点结果如下：