QT-数字软键盘

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已于 2022-04-13 21:41:40 修改

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分类专栏： Qt C++ 文章标签： qt ui 开发语言

于 2022-02-27 15:00:16 首次发布

本文链接：https://blog.youkuaiyun.com/u013083044/article/details/123164287

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一、演示效果

请添加图片描述

二、关键程序

关键槽函数代码如下：

ivoid NumKeyboard::slotNumClick()
{
	m_strText = ui.lineEdit->text();
	QPushButton *btn = qobject_cast<QPushButton *>(sender());
	QString strObjectName = sender()->objectName();

	if (strObjectName == QString("btnLeft"))
	{
		int idx = ui.lineEdit->cursorPosition();
		if (idx == 0)
		{
			ui.lineEdit->setCursorPosition(idx);
			ui.lineEdit->setFocus();
			return;
		}
		m_strText.remove(idx - 1, 1);
		ui.lineEdit->setText(m_strText);
	}
	else if (strObjectName == QString("btnPoint"))
	{
		int idx = ui.lineEdit->cursorPosition();
		m_strText.insert(idx, QString("."));
		ui.lineEdit->setText(m_strText);
		ui.lineEdit->setCursorPosition(idx + 1);
	}
	else
	{
		for (size_t i = 0; i < 10; i++)
		{
			QString strName = QString("btn%1").arg(i);
			if (strName == strObjectName)
			{
				//光标的位置索引
				int idx = ui.lineEdit->cursorPosition();  

				m_strText.insert(idx,QString("%1").arg(i));  
				ui.lineEdit->setText(m_strText); 
				ui.lineEdit->setCursorPosition(idx + 1);

				break;
			}
		}
	}

	ui.lineEdit->setFocus();
}