qt-键盘输入法

切换输入法

// 输入法变量
HKL  g_hCurKL;

/*
0x0409的专业名称是Language Identifier，详见：
https://msdn.microsoft.com/en-us/library/dd318693(v=vs.85).aspx
*/
void disableIME()
{
	LOGI((QString("disableIME enter:")).toStdString().c_str());
	g_hCurKL = GetKeyboardLayout(0);
	LoadKeyboardLayout((LPCWSTR)QString("0x0409").utf16(), KLF_ACTIVATE);
}

void enableIME()
{
	LOGI((QString("enableIME enter:")).toStdString().c_str());
	ActivateKeyboardLayout(g_hCurKL, 0);
}

特殊按键

web site

组合键

void MyWidget::keyPressEvent(QKeyEvent *event)
{
    // 捕捉 Ctrl + Alt + A 组合键;
    if (event->key() == Qt::Key_A  &&  event->modifiers() == (Qt::AltModifier | Qt::ControlModifier))
    {
        // 开始截图;
        startCatureImage();
    }
	...
}

键盘事件，输入法状态下

bool remoteCom::eventFilter(QObject *obj, QEvent *ev)
{
	if (QEvent::KeyPress == ev->type())
	{
		//英文输入法
		QKeyEvent *keyEvent = dynamic_cast<QKeyEvent *>(ev);
		switch (keyEvent->key())
		{
		case Qt::Key_0:
		case Qt::Key_Backspace:
			break;
		default:
			break;
		}
	}else if(QEvent::InputMethod== ev->type())
	{
		// 中文或其他输入法
		QInputMethodEvent *keyEvent = dynamic_cast<QInputMethodEvent *>(ev);
		QString strInput = keyEvent->commitString();
		//strInput 是键盘输入值
	}
	return true;
}

发送键盘按下消息

QKeyEvent tabKey(QEvent::KeyPress, Qt::Key_Right, Qt::NoModifier);
QCoreApplication::sendEvent(m_textEditIn, &tabKey);


/*
https://www.codeproject.com/Articles/7305/Keyboard-Events-Simulation-using-keybd-event-funct
将Qt::key的值转为windows bVk的值，即调用keybd_event需要的键盘值
keybd_event(key, 0x45, KEYEVENTF_EXTENDEDKEY, 0);//按键按下
keybd_event(key, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);//按键松开
*/
int translateKeyCode(int key)
{
	int k = key;
	bool legal = true;
	if(k >= Qt::Key_0 && k <= Qt::Key_9)
	{
	}
	else if(k >= Qt::Key_A && k <= Qt::Key_Z)
	{
	}
	else if(k >= Qt::Key_F1 && k <= Qt::Key_F24)
	{
		k &= 0x000000ff;
		k += 0x40;
	}
	else if(k == Qt::Key_Tab)
	{
		k = 0x09;
	}
	else if(k == Qt::Key_Backspace)
	{
		k = 0x08;
	}
	else if(k == Qt::Key_Return)
	{
		k = 0x0d;
	}
	else if(k <= Qt::Key_Down && k >= Qt::Key_Left)
	{
		int off = k - Qt::Key_Left;
		k = 0x25 + off;
	}
	else if(k == Qt::Key_Shift)
	{
		k = 0x10;
	}
	else if(k == Qt::Key_Control)
	{
		k = 0x11;
	}
	else if(k == Qt::Key_Alt)
	{
		k = 0x12;
	}
	else if(k == Qt::Key_Meta)
	{
		k = 0x5b;
	}
	else if(k == Qt::Key_Insert)
	{
		k = 0x2d;
	}
	else if(k == Qt::Key_Delete)
	{
		k = 0x2e;
	}
	else if(k == Qt::Key_Home)
	{
		k = 0x24;
	}
	else if(k == Qt::Key_End)
	{
		k = 0x23;
	}
	else if(k == Qt::Key_PageUp)
	{
		k = 0x21;
	}
	else if(k == Qt::Key_Down)
	{
		k = 0x22;
	}
	else if(k == Qt::Key_CapsLock)
	{
		k = 0x14;
	}
	else if(k == Qt::Key_NumLock)
	{
		k = 0x90;
	}
	else if(k == Qt::Key_Space)
	{
		k = 0x20;
	}
	else
		legal = false;

	if(!legal)
		return 0;
	return k;
}