[QT] Example Analysis of QT tutorial [10] File Attribute Viewer (qfileinfo)

The key knowledge is nearly commented out in the code...
Please read the code carefully
Original article
Reprinted please keep this link

Http://blog.csdn.net/siren0203

 

Header file

Getinfo. h

 

# Ifndef header_h <br/> # define header_h <br/> # include <qdialog> <br/> # include <qobject> <br/> class qpushbutton; <br/> class qlineedit; <br/> class qpushbutton; <br/> class qlabel; <br/> class qvboxlayout; <br/> class qhboxlayout; <br/> class qgridlayout; <br/> class getfileinfo: Public qdialog {<br/> q_object <br/> Public: <br/> getfileinfo (); <br/> Public: <br/> qpushbutton * openfile; <br/> qpushbutton * getinfo; <br/> qlineedit * filename; <br/> qlineedit * editsize; <br/> qlineedit * editcreatetime; <br/> qlineedit * editupdatetime; <br/> qlineedit * editlastvtime; <br/> qlabel * labelfilename; <br/> qlabel * labelsize; <br/> qlabel * labelcreatetime; <br/> qlabel * labelupdatetime; <br/> qlabel * labellastvtime; <br/> qvboxlayout * vbox; <br/> qhboxlayout * hbox; <br/> qgridlayout * gbox; <br/> Public slots: <br/> void openfiledlg (); <br/> void getfiledlg (); </P> <p >}; <br/> # endif // header_h <br/>

 

 

Program Implementation Code

 

Main. cpp

 

# Include <qapplication> <br/> # include <qfiledialog> <br/> # include <qpushbutton> <br/> # include <qlineedit> <br/> # include <qlabel> <br/> # include <qvboxlayout> <br/> # include <qhboxlayout> <br/> # include <qgridlayout> <br/> # include <qtextcodec> <br/> # include <qdialog> <br/> # include <qfileinfo> <br/> # include <qdatetime> <br/> # include "getinfo. H "<br/> getfileinfo: getfileinfo () {<br/> openfile = new qpushbutton (TR (" open ")); <br/> getinfo = new qpushbutton (TR ("get info"); <br/> editsize = new qlineedit (this ); <br/> editcreatetime = new qlineedit (this); <br/> editupdatetime = new qlineedit (this); <br/> editlastvtime = new qlineedit (this ); <br/> filename = new qlineedit (this); <br/> labelfilename = new qlabel (TR ("file name ")); <br/> labelsize = new qlabel (TR ("file size"); <br/> labelcreatetime = new qlabel (TR ("Creation Time ")); <br/> labelupdatetime = new qlabel (TR ("modification time"); <br/> labellastvtime = new qlabel (TR ("last access time ")); <br/> gbox = new qgridlayout (this); <br/> gbox-> addwidget (labelfilename, 0, 1); <br/> gbox-> addwidget (filename, 0, 2 ); <br/> gbox-> addwidget (openfile,); <br/> gbox-> addwidget (labelsize,); <br/> gbox-> addwidget (editsize, 1, 2); <br/> gbox-> addwidget (labelcreatetime, 2, 1); <br/> gbox-> addwidget (editcreatetime, 2, 2 ); <br/> gbox-> addwidget (labelupdatetime, 3,1); <br/> gbox-> addwidget (editupdatetime, 3,2); <br/> gbox-> addwidget (labellastvtime, 4, 1); <br/> gbox-> addwidget (editlastvtime, 4, 2); </P> <p> hbox = new qhboxlayout (this ); <br/> hbox-> addwidget (getinfo); <br/> gbox-> addlayout (hbox, 5, 2); <br/> setlayout (gbox ); <br/> // associate the signal to the slot .. <br/> connect (openfile, signal (clicked (), this, slot (openfiledlg (); <br/> connect (getinfo, signal (clicked ()), this, slot (getfiledlg (); <br/> setwindowtitle (TR ("person http://blog.csdn.net/siren0203 ")); <br/>}< br/> // open the file <br/> void getfileinfo: openfiledlg () {<br/> qstring files = qfiledialog: getopenfilename (this ); <br/> filename-> settext (files); <br/>}< br/> // obtain File Information <br/> void getfileinfo: getfiledlg () {<br/> // open the file <br/> qfileinfo F (filename-> text ()); <br/> // obtain the file creation time <br/> qdatetime createtime = f. created (); <br/> // obtain the last file update time <br/> qdatetime updatetime = f. lastmodified (); <br/> // obtain the last file browsing time <br/> qdatetime lastrtime = f. lastread (); <br/> // display attributes <br/> editsize-> settext (qstring ("% 1 "). arg (F. size (); <br/> editcreatetime-> settext (createtime. tostring (); <br/> editupdatetime-> settext (updatetime. tostring (); <br/> editlastvtime-> settext (lastrtime. tostring (); <br/>}< br/> int main (INT argc, char ** argv) {<br/> qapplication app (argc, argv ); <br/> qtextcodec: setcodecfortr (qtextcodec: codecforname ("gb2312"); <br/> getfileinfo Info; <br/> info. show (); <br/> return app.exe C (); <br/>}