Backend interface. More...

#include <Backend.h>

Inheritance diagram for CBackend:

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Collaboration diagram for CBackend:

Signals
void	sigRunning ()
	Emitted when the plugin is successfully started.

void	sigStop ()
	Notify the user to stop.

void	sigFinished ()
	Successful stopped signal.

void	sigError (const int nError, const QString &szError=QString())
	Triggered when an error is generated.

void	sigInformation (const QString &szInfo)
	Triggering from a background thread displays information in the main thread without blocking the background thread.

void	sigShowMessageBox (const QString &szTitle, const QString &szMessage, const QMessageBox::Icon &icon=QMessageBox::Information)
	Trigger the display of a message dialog (QMessageBox) in the main thread from a background thread without blocking the background thread.

void	sigBlockShowMessageBox (const QString &szTitle, const QString &szMessage, QMessageBox::StandardButtons buttons, QMessageBox::StandardButton &nRet, bool &checkBox, QString checkBoxContext=QString())
	Block background threads and display message dialogs in foreground threads (QMessageBox)

void	sigBlockInputDialog (const QString &szTitle, const QString &szLable, const QString &szMessage, QString &szText)
	Block background threads and display input dialogs in foreground threads (QInputDialog)

void	sigBlockShowWidget (const QString &className, int &nRet, void *pContext)
	Blocks the background thread and displays the window in the foreground thread.

Public Member Functions
	CBackend (COperate *pOperate=nullptr)

virtual int	Start ()
	Start.

virtual int	Stop ()
	Stop.

virtual int	WakeUp ()
	Wake up.

Protected Types
enum class	OnInitReturnValue { Fail = -1 , Success = 0 , UseOnProcess = Success , NotUseOnProcess = 1 }

Protected Slots
virtual void	slotTimeOut ()
	a non-Qt event loop (that is, normal loop processing)， It call OnProcess(), and start timer.

Protected Member Functions
virtual OnInitReturnValue	OnInit ()=0
	Initialization.

virtual int	OnClean ()=0
	Clean.

virtual int	OnProcess ()
	Specific operation processing of plug-in.

Private Member Functions
int	SetConnect (COperate *pOperate)

Detailed Description

Backend interface.

It is implemented by the Protocol plugin. It starts a timer by default to start a non-Qt event loop (that is, normal loop processing) . See Start(), slotTimeOut(), OnProcess() for details. Of course, it still supports Qt events (the signal-slot mechanism of QObject).

Note

The interface only is implemented by plug-in.
If it's asynchronous (with a background thread), its instance is in a background thread.
The plug-in needs to implement the following interface.

See also: CBackendThread::run() CFrmViewer

Definition at line 41 of file Backend.h.

Member Enumeration Documentation

◆ OnInitReturnValue

enum class CBackend::OnInitReturnValue

strongprotected

Definition at line 85 of file Backend.h.

Constructor & Destructor Documentation

◆ ~CBackend()

CBackend::~CBackend ( )

virtual

Definition at line 17 of file Backend.cpp.

Member Function Documentation

◆ OnClean()

virtual int CBackend::OnClean ( )

protectedpure virtual

Clean.

See also: Stop()

Implemented in CBackendFileTransfer, CBackendFreeRDP, CBackendLibVNCServer, CBackendPlayer, CBackendSSH, and CBackendVnc.

◆ OnInit()

virtual OnInitReturnValue CBackend::OnInit ( )

protectedpure virtual

Initialization.

Returns

< 0: error
= 0: Use OnProcess() (non-Qt event loop)
> 0: Don't use OnProcess() (qt event loop)

See also: Start()

Implemented in CBackendFileTransfer, CBackendFreeRDP, CBackendLibVNCServer, CBackendPlayer, CBackendSSH, and CBackendVnc.

◆ OnProcess()

int CBackend::OnProcess ( )

protectedvirtual

Specific operation processing of plug-in.

Returns

>= 0: continue, Interval call time (msec)
= -1: stop
< -1: error

See also: Start() slotTimeOut()

Reimplemented in CBackendFileTransfer, CBackendFreeRDP, CBackendLibVNCServer, CBackendSSH, and CBackendVnc.

Definition at line 135 of file Backend.cpp.

◆ SetConnect()

int CBackend::SetConnect ( COperate * pOperate )

private

Definition at line 22 of file Backend.cpp.

◆ sigBlockInputDialog

void CBackend::sigBlockInputDialog	(	const QString &	szTitle,
		const QString &	szLable,
		const QString &	szMessage,
		QString &	szText
	)

signal

Block background threads and display input dialogs in foreground threads (QInputDialog)

See also: COperate::slotBlockInputDialog() SetConnect

◆ sigBlockShowMessageBox

void CBackend::sigBlockShowMessageBox	(	const QString &	szTitle,
		const QString &	szMessage,
		QMessageBox::StandardButtons	buttons,
		QMessageBox::StandardButton &	nRet,
		bool &	checkBox,
		QString	checkBoxContext = `QString()`
	)

signal

Block background threads and display message dialogs in foreground threads (QMessageBox)

Parameters

title
message
buttons
nRet
checkBox
checkBoxContext

See also: COperate::slotBlockShowMessageBox() SetConnect

◆ sigBlockShowWidget

void CBackend::sigBlockShowWidget	(	const QString &	className,
		int &	nRet,
		void *	pContext
	)

signal

Blocks the background thread and displays the window in the foreground thread.

Parameters

className	show windows class name The class must have follower public functions: Q_INVOKABLE void SetContext(void* pContext);
nRet	If className is QDialog derived class, QDialog::exec() return value. Otherwise, ignore
pContext	pass context to COperate::slotBlockShowWidget()

See also: COperate::slotBlockShowWidget() SetConnect

◆ sigFinished

void CBackend::sigFinished ( )

signal

Successful stopped signal.

Triggered only by plugins

See also: Stop

◆ sigInformation

void CBackend::sigInformation ( const QString & szInfo )

signal

Triggering from a background thread displays information in the main thread without blocking the background thread.

Note: It differs from sigShowMessageBox in that sigShowMessageBox is displayed in a dialog box

See also: sigShowMessageBox SetConnect COperate::sigInformation()

◆ sigRunning

void CBackend::sigRunning ( )

signal

Emitted when the plugin is successfully started.

Emitted only by plugins

See also: Start()

◆ sigShowMessageBox

void CBackend::sigShowMessageBox	(	const QString &	szTitle,
		const QString &	szMessage,
		const QMessageBox::Icon &	icon = `QMessageBox::Information`
	)

signal

Trigger the display of a message dialog (QMessageBox) in the main thread from a background thread without blocking the background thread.

Note: It differs from sigInformation in that sigInformation is not displayed in a dialog box

See also: sigInformation SetConnect COperate::sigShowMessageBox()

◆ sigStop

void CBackend::sigStop ( )

signal

Notify the user to stop.

Emitted only by plugins Emitted when you need to stop from the plug-in. For example, the peer disconnect or reset the connection or the connection is error

◆ slotTimeOut

void CBackend::slotTimeOut ( )

protectedvirtualslot

a non-Qt event loop (that is, normal loop processing)， It call OnProcess(), and start timer.

If it is not have a non-Qt event loop, can override it, or OnInit() return >0

See also: Start() OnProcess()

Definition at line 105 of file Backend.cpp.

◆ Start()

int CBackend::Start ( )

virtual

Start.

Based on the OnInit() return value, decide whether to start the timer to support no-qt event

Note

If it is asynchronous, sigRunning() is triggered after the start is success.
If it is synchronous, sigRunning() is triggered after this function is successfully called.

Returns

= 0: success
< 0: error

See also: sigRunning(); OnInit() OnProcess() slotTimeOut()

Definition at line 80 of file Backend.cpp.

◆ Stop()

int CBackend::Stop ( )

virtual

Stop.

Returns: 0: success; other error

See also: sigFinished()

Definition at line 92 of file Backend.cpp.

◆ WakeUp()

int CBackend::WakeUp ( )

virtual

Wake up.

When it is block(a non-Qt event loop)

Reimplemented in CBackendFreeRDP, CBackendLibVNCServer, CBackendSSH, CBackendVnc, and CBackendDesktop.

Definition at line 100 of file Backend.cpp.

The documentation for this class was generated from the following files:

/home/runner/work/RabbitRemoteControl/RabbitRemoteControl/Src/Backend.h
/home/runner/work/RabbitRemoteControl/RabbitRemoteControl/Src/Backend.cpp

Signals

Public Member Functions

Protected Types

Protected Slots

Protected Member Functions

Private Member Functions

Detailed Description

Member Enumeration Documentation

◆ OnInitReturnValue

Constructor & Destructor Documentation

◆ ~CBackend()

Member Function Documentation

◆ OnClean()

◆ OnInit()

◆ OnProcess()

◆ SetConnect()

◆ sigBlockInputDialog

◆ sigBlockShowMessageBox

◆ sigBlockShowWidget

◆ sigFinished

◆ sigInformation

◆ sigRunning

◆ sigShowMessageBox

◆ sigStop

◆ slotTimeOut

◆ Start()

◆ Stop()

◆ WakeUp()