The Graphical User Interface (GUI) module implements the main window of the application. It uses previously + created Generator and Storage modules to generate and store passwords.
+ +We start by creating the gui.h file in the src/apps/PswGen/GUI directory:
+ +/** + * @file PswGen/GUI/gui.h + */ + +#ifndef __PSWGEN_GUI_GUI_H +# define __PSWGEN_GUI_GUI_H + +#endif // gui.h+ +
Include the Plugins/iPlugin header file as this is going to be a plugin and also QObject and + QString as these are almost always needed:
+ +#include <Plugins/iPlugin> +#include <QObject> +#include <QString>+ +
We use the eVaf::PswGen::GUI namespace for this module:
+ +namespace eVaf { +namespace PswGen { +namespace GUI { + +} // namespace eVaf::PswGen::GUI +} // namespace eVaf::PswGen +} // namespace eVaf+ +
The module itself can be implemented as one single class derived from the Plugins::iPlugin parent class:
+ +class Module : public Plugins::iPlugin +{ + Q_OBJECT + +public: + + Module(); + + virtual ~Module(); + +};+ +
Implement pure virtual methods derived from the parent class. The main GUI window is created in the init() method + and the module can only be ready when the initialization is completed. We use the mReady flag to indicate this.
+ +virtual bool init(const QString & args); + + virtual void done(); + + virtual bool isReady() const { return mReady; } + +private: + + bool mReady;+ +
In the private members section we store interfaces from previously written modules:
+ ++ eVaf::PswGen::iGenerator * mGenerator; + + eVaf::PswGen::iStorage * mStorage;+ +
Since these are not known yet, we also need to add forward declarations. These go into the eVaf::PswGen namespace + at the beginning of the file:
+ ++namespace eVaf { +namespace PswGen { + struct iGenerator; + struct iStorage;+ +
The main window needs couple of widgets on it:
+ ++ /// Widgets on the screen + QLineEdit * wMasterPassword; + QLineEdit * wName; + QSpinBox * wLength; + QLineEdit * wPassword; + QPushButton * wGenerate; + QPushButton * wCopy;+ +
Add slots for push buttons:
+ +private slots: + + /// 'Generate' button clicked + void generateClicked(); + + /// 'Copy' button clicked + void copyClicked();+ +
The private keyword is ignored by the Qt meta-object compiler, but it is a good practice to have it here + as an indicator, that these slots are private and should not be used outside of the class.
+ +The Generate push button should be enabled only when the master password and name are given. Add another + slot that will be connected to the textChanged() signal from these widgets:
+ ++ /// Master password or name changed + void textChanged(QString const &);+ +
And here is the final gui.h file:
+ +/** + * @file PswGen/GUI/gui.h + */ +#ifndef __PSWGEN_GUI_GUI_H +# define __PSWGEN_GUI_GUI_H + +#include <Plugins/iPlugin> + +#include <QObject> +#include <QString> + +class QLineEdit; +class QSpinBox; +class QPushButton; + +namespace eVaf { +namespace PswGen { + struct iGenerator; + struct iStorage; +namespace GUI { + +/// Graphical User Interface for the PswGen application. +class Module : public Plugins::iPlugin +{ + Q_OBJECT + +public: + + Module(); + + virtual ~Module(); + + virtual bool init(const QString & args); + + virtual void done(); + + virtual bool isReady() const { return mReady; } + +private slots: + + /// Master password or name changed + void textChanged(QString const &); + + /// 'Generate' button clicked + void generateClicked(); + + /// 'Copy' button clicked + void copyClicked(); + +private: // Members + + static int const DefaultPasswordLength; + + /// Flag indicating that the module is ready + bool mReady; + + /// The iGenerator interface + eVaf::PswGen::iGenerator * mGenerator; + + /// The iStorage interface (can be null) + eVaf::PswGen::iStorage * mStorage; + + /// Widgets on the screen + QLineEdit * wMasterPassword; + QLineEdit * wName; + QSpinBox * wLength; + QLineEdit * wPassword; + QPushButton * wGenerate; + QPushButton * wCopy; +}; + +} // namespace eVaf::PswGen::GUI +} // namespace eVaf::PswGen +} // namespace eVaf + +#endif // gui.h ++ +
Continue implementing the GUI Module.
+ + +