QT 自定义MainWindow SourceCode

#include "ImMainWindow.h"
#define BORDERWIDTH 5

ImMainWindow::ImMainWindow( QWidget *parent )
:QMainWindow(parent)
{
 m_mouse_down = false ;  
 setObjectName("ImMainWindow");
 setWindowFlags(Qt::FramelessWindowHint );
 setAttribute(Qt::WA_TranslucentBackground);
 setAttribute(Qt::WA_NoSystemBackground, true);
 setMouseTracking(true) ;

 m_titleBar = new ImTitleBar(this) ; 
 m_menuBar = new QMenuBar(this);
 m_menuBar->setObjectName("mainMenuBar");
 //setMenuBar(m_menuBar);
 createActions();
 createMenus();

 m_toolBar = new QToolBar(tr("File"), this);
 addToolBar( m_toolBar);
 createToolBars();

 m_content = new QTextEdit(this) ; 
 m_content->setObjectName("contentWidget");
 m_content->resize(500, 200);

 QVBoxLayout *inbox = new QVBoxLayout;
 inbox->setMenuBar(m_menuBar);
 inbox->addWidget(m_toolBar);
 inbox->setMargin(0) ;
 inbox->setSpacing(0) ; 
 inbox->setContentsMargins(0 ,0, 0, 0);

 QWidget *intWgt = new QWidget(this);
 intWgt->setWindowFlags(Qt::FramelessWindowHint );
 intWgt->setAttribute(Qt::WA_TranslucentBackground);
 intWgt->setAttribute(Qt::WA_NoSystemBackground, true);
 intWgt->setLayout(inbox);

 QVBoxLayout *vbox = new QVBoxLayout;
 vbox->addWidget(intWgt);
 vbox->setMargin(0) ;
 vbox->setSpacing(0) ; 
 vbox->setContentsMargins(0 ,0, 0, 0);

 m_frame = new QFrame(this);
 m_frame->setObjectName("menuFrame");
 
 m_frame->setWindowFlags(Qt::FramelessWindowHint );
 m_frame->setAttribute(Qt::WA_TranslucentBackground);
 m_frame->setAttribute(Qt::WA_NoSystemBackground, true);
 m_frame->setMouseTracking(true) ;
 m_frame->setLayout(vbox);
 
 QVBoxLayout *layout = new QVBoxLayout(this);  
 layout->addWidget(m_frame);
 layout->addWidget(m_content) ;
 
 //layout->setMargin(5) ;  
 layout->setSpacing(0);
 layout->setContentsMargins(0, 0, 0, 0);
  setLayout(layout);

 //setCentralWidget(m_content);
}

void ImMainWindow::setWindowTitleText(const QString title)
{
 m_titleBar->setWindowTitleText(title);
}

// Allows you to access the content area of the frame  
// where widgets and layouts can be added   
QWidget *ImMainWindow::contentWidget() const
{  
 return m_content ;  
}
ImTitleBar *ImMainWindow::titleBar() const
{  
 return m_titleBar ;  
}
void ImMainWindow::mousePressEvent(QMouseEvent *e)
{
 m_old_pos = e->pos() ;  
 m_mouse_down = e->button() == Qt::LeftButton ;  
}

void ImMainWindow::mouseMoveEvent(QMouseEvent *e)
{
 int x = e->x() ;  
 int y = e->y() ;  
 if (m_mouse_down)
 {
  int dx = x - m_old_pos.x() ;  
  int dy = y - m_old_pos.y() ;  
  QRect g = geometry() ;  
  if (left)
   g.setLeft(g.left() + dx) ;  

  if (right)
   g.setRight(g.right() + dx) ;  

  if (bottom)
   g.setBottom(g.bottom() + dy) ;  
  setGeometry(g) ;  
  m_old_pos = QPoint(!left ? e->x() : m_old_pos.x(), e->y()) ;  
 } 
 else
 {
  QRect r = rect() ;  
  left = qAbs(x - r.left()) <= BORDERWIDTH ;  
  right = qAbs(x - r.right()) <= BORDERWIDTH ;  
  bottom = qAbs(y - r.bottom()) <= BORDERWIDTH ;  
  bool hor = left | right ;  
  if (hor && bottom)

  {
   if (left)
    setCursor(Qt::SizeBDiagCursor) ;  
   else
    setCursor(Qt::SizeFDiagCursor) ;  
  } 
  else if (hor)
  {
   setCursor(Qt::SizeHorCursor) ;  
  }  
  else if (bottom)
  {
   setCursor(Qt::SizeVerCursor) ;  
  } 
  else
  {
   setCursor(Qt::ArrowCursor) ;  
  }
 }
}

void ImMainWindow::mouseReleaseEvent(QMouseEvent *e)
{
 Q_UNUSED(e)  m_mouse_down = false ;  
}

void ImMainWindow::paintEvent( QPaintEvent* event )
{
 Q_UNUSED(event);
 QStyleOptionFrame opt;
 opt.init(this);
 QPainter p(this);
 style()->drawPrimitive(QStyle::PE_Frame, &opt, &p, this);
}

void ImMainWindow::resizeEvent( QResizeEvent * event )
{
 //QMainWindow::resizeEvent(event);
 int height = m_titleBar->height();
 m_titleBar->resize(size().width(), height);
 m_frame->setGeometry(6, height, size().width()-30,
  m_menuBar->height() + m_toolBar->height());
 //m_menuBar->move(0, height);
 m_content->move(6, height + m_frame->height() + 10);
}

//! [8]
void ImMainWindow::createMenus()
{
 //! [9] //! [10]
 fileMenu = m_menuBar->addMenu(tr("&File"));
 fileMenu->addAction(newAct);
 //! [9]
 fileMenu->addAction(openAct);
 editMenu = m_menuBar->addMenu(tr("&Edit"));
 editMenu->addAction(newAct);
 //! [9]
 editMenu->addAction(openAct);

}

//! [4]
void ImMainWindow::createActions()
{
 //! [5]
 newAct = new QAction(tr("&New"), this);
 newAct->setShortcuts(QKeySequence::New);
 newAct->setStatusTip(tr("Create a new file"));
 connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
 //! [4]

 openAct = new QAction(tr("&Open..."), this);
 openAct->setShortcuts(QKeySequence::Open);
 openAct->setStatusTip(tr("Open an existing file"));
 connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
 //! [5]
}

void ImMainWindow::createToolBars()
{
 //m_toolBar = addToolBar(tr("File"));
 m_toolBar->addAction(newAct);
 //! [29] //! [31]
 m_toolBar->addAction(openAct);
}

/********************************************
QTreeView的header上加Checkbox
1. 构造中加入
QCheckBox *pCheck = new QCheckBox(header());
 pCheck->setObjectName("headerCheck");
 pCheck->setCheckState(Qt::Checked);
 connect(header(), SIGNAL(sectionResized(int, int, int)), this, SLOT(slotRefreshLastColumnKey(int, int, int)));

2，slotRefreshLastColumnKey(int, int, int)中处理位置
QCheckBox * checkbox = qFindChild(header(), "headerCheck");
 if(checkbox)
 {
  if(!header()->isSectionHidden(0))
  {
   int left = header()->sectionViewportPosition(0);
   checkbox->move(left + (header()->sectionSize(0) - checkbox->width()) / 2,
             (header()->height() - checkbox->height()) / 2);
  }
  else
   checkbox->move(-100,0);
 }