mainwindow.cpp

一大堆的qt程序,在qte2.3.7下全部可以很好地运行

#include "mainwindow.h"

MainWindow::MainWindow(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(openFile()));
//	file->setItemEnabled(id_save,TRUE);
	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);
	view->insertItem("choose&backgroundcolor",this,
			SLOT(chooseBackgroundColor()),CTRL+Key_G);

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

	QToolBar *tools = new QToolBar("tools",this);
	tools->setGeometry(20,150,60,60);
	QPixmap cutIcon("editcut.png");
	QToolButton *exitmain = new QToolButton(cutIcon,"cut",0,this,
	         SLOT(cut()),tools,"cut");
	exitmain->setGeometry(20,180,20,20);
	
	QPixmap copyIcon("editcopy.png");
	QToolButton *copy = new QToolButton(copyIcon,"copy",0,this,
	 	 SLOT(copy()),tools);

	QPixmap pasteIcon("editpaste.png");
	QToolButton *paste = new QToolButton(pasteIcon,"paste",0,this,
	  	 SLOT(paste()),tools,"paste");
	
	statusBar()->message("Ready");
	statusBar()->setGeometry(30,0,40,40);

}

void MainWindow::openFile()
{
	QPushButton *button;
	button = new QPushButton("h&ello",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()));
	statusBar()->message("opened");
}

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

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

void MainWindow::cut()
{
	label->setText("cut");
	statusBar()->message("done");
}

void MainWindow::copy()
{
	label->setText("copy");
	statusBar()->message("done");
}

void MainWindow::paste()
{
	label->setText("paste");
	statusBar()->message("done");
}

void MainWindow::hidelabel()
{
	label->hide();
	statusBar()->message("The label has been hided");
}

void MainWindow::showlabel()
{
	label->show();
	statusBar()->message("The label has been showed");
}

void MainWindow::chooseBackgroundColor()
{
	ColorDialog *d = new ColorDialog(this,"NULL",TRUE);
	d->exec();
	setBackgroundColor(d->color());
	delete d;
}