mainwidget.cpp

一大堆的qt程序,在qte2.3.7下全部可以很好地运行

#include "mainwidget.h"

MainWidget::MainWidget(QWidget *parent,const char *name)
           :QMainWindow(parent,name)
{
  	setCaption("Example");
	setBackgroundColor(yellow);

	QFont f("Helvetica",18,QFont::Bold);
	setFont(f);
	label = new QLabel("",this);
	label->setGeometry(10,50,200,50);
	label->setBackgroundColor(green);
	label->setFont(f);
	
//	QPopupMenu *help = new QPopupMenu;
//	help->setGeometry(0,150,40,30);	
//	help->show();

	QPopupMenu *file = new QPopupMenu;
	QFont f1("Helvetica",12,QFont::Bold);                     
	setFont(f1);                                              
	file->setFont(f1);                                       
	file->insertItem("&Open",this,SLOT(openFile()),          
                 CTRL+Key_O);
	file->insertItem("&Save",this,SLOT(saveFile()),
	         CTRL+Key_S);
//	int id_save = file->insertItem("&Save",this,SLOT(saveFile()));
//	file->setItemEnabled(id_save,FALSE);
	file->insertItem("E&xit",this,SLOT(exitMain()),
	 	 CTRL+Key_X);

	QPopupMenu *edit = new QPopupMenu;
	edit->setFont(f1);
	edit->insertItem("cu&t",this,SLOT(cut()),CTRL+Key_T);
	edit->insertItem("&copy",this,SLOT(copy()),CTRL+Key_C);
	edit->insertItem("&paste",this,SLOT(paste()),CTRL+Key_P);

	QPopupMenu *view = new QPopupMenu;
	view->setFont(f1);
	view->insertItem("&hindlabel",this,SLOT(hidelabel()),CTRL+Key_H);
	view->insertItem("sho&wlabel",this,SLOT(showlabel()),CTRL+Key_W);

	QMenuBar *menu;
	menu = new QMenuBar(this);
 	menu->insertItem("Fi&le",file);
	menu->insertItem("&Edit",edit);
	menu->insertItem("&View",view);
}


void MainWidget::openFile()
{
	QPushButton *button;
	button = new QPushButton("hello",0);
	button->setGeometry(50,100,150,40);
	button->show();
	button->connect(button,SIGNAL(clicked()),button,SLOT(close()));
	button->connect(button,SIGNAL(clicked()),label,SLOT(show()));
}


void MainWidget::saveFile()
{
	label->setText("File has been saved!");
}

void MainWidget::exitMain()
{
	QApplication::exit();
}

void MainWidget::cut()
{
	label->setText("cut");
}

void MainWidget::copy()
{
	label->setText("copy");
}

void MainWidget::paste()
{
	label->setText("paste");
}

void MainWidget::hidelabel()
{
	label->hide();
}

void MainWidget::showlabel()
{
	label->show();
}