mywindow.cpp

使用linux 下QT编出图片查看器,有目录查找的

#include<qaction.h>
#include <qlabel.h>
#include<qapplication.h>
#include <qhbox.h>
#include<qmenubar.h>
#include<qpopupmenu.h>
#include<qstatusbar.h>
#include<qmainwindow.h>
#include<qimage.h>
#include<qfiledialog.h>
#include<qmessagebox.h>
#include<qpixmap.h>
#include"mywindow.h"
Mywindow::Mywindow(QWidget *parent, const char *name)
	:QMainWindow(parent,name)
{

//dir
	QHBox *hbox = new QHBox(this);
	
	mw = new DirectoryView(hbox);
	mw->addColumn("Name");
	mw->addColumn("Type");
	mw->setTreeStepSize(20);
	
	const QFileInfoList* roots =QDir::drives();
	QPtrListIterator<QFileInfo> i(*roots);
	QFileInfo* fi;
	while ((fi=*i)){
	++i;
	Directory* root =new Directory(mw,fi->filePath());
	if(roots->count() <=1)
		root->setOpen(TRUE);
	}

	mw->resize(400,400);
	mw->setCaption(" mywindow -s -dir");
	mw->setAllColumnsShowFocus(TRUE);

	
 label=new QLabel(hbox);
 label->setPixmap(QPixmap("images/May.jpg"));


setCentralWidget(hbox);
	 createActions();
	 createMenus();
	 createToolBars();
	 createStatusBar();
fileMenu=new QPopupMenu;
	setCaption(tr("Picture viewer"));
	setIcon(QPixmap::fromMimeSource( "ttttppppp "));
	
	connect(mw,SIGNAL(fileSelected(const QString &)),this,SLOT(listOpen(const QString &)));

}

void Mywindow::open()//file
{
	fileName=QFileDialog::getOpenFileName("/",tr("*.jpg\n*.png"),this);
	resume();
}
void Mywindow::close()
{	

}
void Mywindow::exit()

{
}
void Mywindow::listOpen(const QString & file)
{
	if(file.right(4)==".jpg")
	{
	fileName=file;
	resume();
	}
}
void Mywindow::zoomIn()//tools
{	
	int w,h;
	if(scale<10)
	return;
	map=QImage(fileName);
	scale-=10;
	h=map.height()*scale/100;
	w=map.width()*scale/100;
	QImage tmp=map.smoothScale(w,h);
	label->setPixmap(tmp);
	statusLabel->setText(fileName+QString("%1% %2 x%3").arg(scale).arg(w).arg(h));
	setMaximumSize(label->sizeHint());
}
void Mywindow::zoomOut()
{
	int w,h;
	if(scale>290)
	return;
	map=QImage(fileName);
	scale+=10;
	h=map.height()*scale/100;
	w=map.width()*scale/100;
	QImage tmp=map.smoothScale(w,h);
	label->setPixmap(tmp);
  statusLabel->setText(fileName+QString(" %1% %2 x%3").arg(scale).arg(w).arg(h));
	setMaximumSize(label->sizeHint());
}
void Mywindow::resume()
{
	if(!fileName.isEmpty())
	{
	scale=100;
	label->setPixmap(QPixmap(fileName));
	statusLabel->setText(fileName +QString(" %1%").arg(scale));
	}
}

void Mywindow::about()// about
{  
 	QMessageBox::about(this,tr("About, Image vier"),"dddddddddddddddd" );
}
void Mywindow::aboutQt()
{
	QMessageBox::aboutQt(this,tr("Qt Themes Example"));
}
void Mywindow::createActions()
{		
	openAct=new QAction(tr("open"),tr("&open"),QKeySequence(tr("Ctrl+N")),this);
	openAct->setIconSet(QPixmap::fromMimeSource("images/open.png"));
	openAct->setStatusTip(tr(""));
	connect(openAct,SIGNAL(activated()),this,SLOT( open()));

	closeAct=new QAction(tr("close"),tr("&close"),QKeySequence(tr("b")),this);
	closeAct->setIconSet(QPixmap::fromMimeSource("images/close.png"));
	closeAct->setStatusTip(tr(""));
	connect(closeAct,SIGNAL(activated()),this,SLOT( close()));
	
	exitAct=new QAction(tr("exit"),tr("&close"),QKeySequence(tr("")),this);
	exitAct->setIconSet(QPixmap::fromMimeSource("images/cut.png"));
	exitAct->setStatusTip(tr(""));
	connect(exitAct,SIGNAL(activated()),this,SLOT( exit()));

	zoomInAct=new QAction(tr("zoomIn"),tr("&zoomIn"),QKeySequence(tr("")),this);
	zoomInAct->setIconSet(QPixmap::fromMimeSource("images/zoomin.png"));
	zoomInAct->setStatusTip(tr(""));
	connect(zoomInAct,SIGNAL(activated()),this,SLOT(  zoomIn()));

	zoomOutAct=new QAction(tr("zoomOut"),tr("&zoomOut"),QKeySequence(tr("")),this);
	zoomOutAct->setIconSet(QPixmap::fromMimeSource("images/zoomout.png"));
	zoomOutAct->setStatusTip(tr(""));
	connect(zoomOutAct,SIGNAL(activated()),this,SLOT(  zoomOut()));

	resumeAct=new QAction(tr("resume"),tr("&resume"),QKeySequence(tr("")),this);
	resumeAct->setIconSet(QPixmap::fromMimeSource("images/resume.png"));
	resumeAct->setStatusTip(tr(""));
	connect(resumeAct,SIGNAL(activated()),this,SLOT(  resume()));

	aboutImageViewAct=new QAction(tr("aboutImage"),tr("&aboutImage"),QKeySequence(tr("")),this);
	aboutImageViewAct->setIconSet(QPixmap::fromMimeSource("images/new.png"));
	aboutImageViewAct->setStatusTip(tr(""));
	connect(aboutImageViewAct,SIGNAL( activated()),this,SLOT(  about()));

	aboutQtAct=new QAction(tr("aboutQt"),tr("&aboutQt"),QKeySequence(tr("")),this);
	aboutQtAct->setIconSet(QPixmap::fromMimeSource("images/paste.png"));
	aboutQtAct->setStatusTip(tr(""));
	connect(aboutQtAct,SIGNAL( activated()),this,SLOT(  aboutQt()));

}
void Mywindow::createMenus()
{	
	fileMenu=new QPopupMenu(this);
	openAct->addTo(fileMenu);
	closeAct->addTo(fileMenu);
	exitAct->addTo(fileMenu);

	toolsMenu=new QPopupMenu(this);
	zoomInAct->addTo(toolsMenu);	
	zoomOutAct->addTo(toolsMenu);
	resumeAct->addTo(toolsMenu);
	
	aboutMenu=new QPopupMenu(this);
	aboutImageViewAct->addTo(aboutMenu);
	aboutQtAct->addTo(aboutMenu);
	
	menuBar()->insertItem("&File", fileMenu);
	menuBar()->insertItem("&Tools", toolsMenu);
	menuBar()->insertItem("&Help", aboutMenu);
}	
void Mywindow::createToolBars()
{
	fileToolBar=new QToolBar(tr(""),this);
	openAct->addTo(fileToolBar);
	closeAct->addTo(fileToolBar);	
	

	toolsToolBar=new QToolBar(tr(""),this);
	zoomInAct->addTo(toolsToolBar);
	zoomOutAct->addTo(toolsToolBar);	
	resumeAct->addTo(toolsToolBar);
    toolsToolBar->addSeparator();
	
}
void Mywindow::createStatusBar()
{
	statusLabel=new QLabel("999",this);
	statusLabel->setAlignment(AlignHCenter);
	statusLabel->setMinimumSize(statusLabel->sizeHint());	
	statusBar()->addWidget(statusLabel);
}