Qt login interface implementation

QT is used in the new project. Therefore, we have recently studied QT and installed and deployed QT creator yesterday. Now we will start the first program immediately.

Make a simple login interface function

As follows:

Code Section

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# Include <qtgui/qapplication> # include "mainwindow. H "# include" logindlg. H "int main (INT argc, char * argv []) {qapplication A (argc, argv); mainwindow W; // logindlg login on the main interface; // if(login.exe C () on the logon Interface () = qdialog: accepted) {W. show (); Return a.exe C ();} else return 0 ;}

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#ifndef LOGINDLG_H#define LOGINDLG_H#include <QDialog>namespace Ui {    class LoginDlg;}class LoginDlg : public QDialog {    Q_OBJECTpublic:    LoginDlg(QWidget *parent = 0);    ~LoginDlg();protected:    void changeEvent(QEvent *e);private:    Ui::LoginDlg *ui;private slots:    void on_pushButton_2_clicked();    void on_pushButton_clicked();};#endif // LOGINDLG_H

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# Include "logindlg. H "# include" ui_logindlg.h "# include" qmessagebox. H "# include" qtextcodec. H "logindlg: logindlg (qwidget * parent): qdialog (parent), UI (new UI: logindlg) {UI-> setupui (this);} logindlg ::~ Logindlg () {Delete UI;} void logindlg: changeevent (qevent * E) {qdialog: changeevent (E); Switch (e-> type () {Case qevent:: languagechange: UI-> retranslateui (this); break; default: break;} void logindlg: on_pushbutton_clicked () {If (this-> UI-> txtname-> text (). trimmed () = tr ("admin") & this-> UI-> txtpwd-> text (). trimmed () = tr ("admin") {accept ();} else {qtextcodec: setcodecfortr (qtextcodec: codecforn Ame ("GBK"); qmessagebox: Warning (this, TR ("warning"), TR ("Incorrect username or password! "), Qmessagebox: Yes); this-> UI-> txtname-> clear (); this-> UI-> txtpwd-> clear (); this-> UI-> txtname-> setfocus () ;}} void logindlg: on_pushbutton_2_clicked () {This-> close ();}

The code is simple to implement basic functions