文本编辑器中替换对话框的设计与实现

本文主要是介绍文本编辑器中替换对话框的设计与实现，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

文章目录

- 1 文本编辑器中替换对话框的设计与实现

1 文本编辑器中替换对话框的设计与实现

替换对话框需求分析：

可复用软件部分。
查找文本框中的指定字符串。
替换单个指定字符串。
替换所有指定字符串。

附加需求：

点击关闭按钮后隐藏。

替换对话框的设计与实现：
在这里插入图片描述
替换对话框的界面布局：

替换算法流程图：

Main Window与ReplaceDialog之间的关系图：

ReplaceDialog.h：

#ifndef _REPLACEDIALOG_H_
#define _REPLACEDIALOG_H_#include "FindDialog.h"class ReplaceDialog : public FindDialog
{Q_OBJECTprotected:QLabel m_replaceLbl;QLineEdit m_replaceEdit;QPushButton m_replaceBtn;QPushButton m_replaceAllBtn;void initControl();void connectSlot();
protected slots:void onReplaceClicked();void onReplaceAllClicked();
public:explicit ReplaceDialog(QWidget *parent = 0, QPlainTextEdit* pText = 0);
};#endif // _REPLACEDIALOG_H_

ReplaceDialog.cpp：

#include "ReplaceDialog.h"ReplaceDialog::ReplaceDialog(QWidget *parent,  QPlainTextEdit* pText) :FindDialog(parent, pText)
{initControl();connectSlot();setWindowTitle("Replace");
}void ReplaceDialog::initControl()
{m_replaceLbl.setText("Replace To:");m_replaceBtn.setText("Replace");m_replaceAllBtn.setText("Replace All");m_layout.removeWidget(&m_matchChkBx);m_layout.removeWidget(&m_radioGrpBx);m_layout.removeWidget(&m_closeBtn);m_layout.addWidget(&m_replaceLbl, 1, 0);m_layout.addWidget(&m_replaceEdit, 1, 1);m_layout.addWidget(&m_replaceBtn, 1, 2);m_layout.addWidget(&m_matchChkBx, 2, 0);m_layout.addWidget(&m_radioGrpBx, 2, 1);m_layout.addWidget(&m_replaceAllBtn, 2, 2);m_layout.addWidget(&m_closeBtn, 3, 2);
}void ReplaceDialog::connectSlot()
{connect(&m_replaceBtn, SIGNAL(clicked()), this, SLOT(onReplaceClicked()));connect(&m_replaceAllBtn, SIGNAL(clicked()), this, SLOT(onReplaceAllClicked()));
}void ReplaceDialog::onReplaceClicked()
{QString target = m_findEdit.text();QString to = m_replaceEdit.text();if( (m_pText != NULL) && (target != "") && (to != "") ){QString selText = m_pText->textCursor().selectedText();if( selText == target ){m_pText->insertPlainText(to);}onFindClicked();}
}void ReplaceDialog::onReplaceAllClicked()
{QString target = m_findEdit.text();QString to = m_replaceEdit.text();if( (m_pText != NULL) && (target != "") && (to != "") ){QString text = m_pText->toPlainText();text.replace(target, to, m_matchChkBx.isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive);m_pText->clear();m_pText->insertPlainText(text);}
}