Qt学习之路之 QTextEdit 重温

悠悠 2022-08-04 08:40 91阅读 0赞

其实，QTextEdit 也有对文本的编辑函数， 剪切，复制，撤销.....

看看下面的这个简单的例子：

![Center][]

控件一目了然。按钮 + QTextedit 对象 ， 垂直布局。

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环境：Windows 8.1

QT版本：5.4.0

开发环境：VS2013

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代码：

头文件

#ifndef EDIT_WIDGET
    #define EDIT_WIDGET
    
    #include <QTextEdit>
    #include <QWidget>
    #include <QVBoxLayout>
    #include <QHBoxLayout>
    #include <QPushButton>
    
    class EditWidget : public QWidget
    {
    	Q_OBJECT
    public:
    		explicit EditWidget(QWidget *parent = 0);
    		~EditWidget();
    
    private:
    	QTextEdit *textEdit;
    	///-----------------
    	QPushButton *cutBtn;
    	QPushButton *copyBtn;
    	QPushButton *undoBtn;
    	QPushButton *pasteBtn;
    	QPushButton *selectAllBtn;
    };
    
    #endif	//EDIT_WIDGET

.cpp文件

#include "eidt_widget.h"
    
    EditWidget::EditWidget(QWidget *parent /*= 0*/) :QWidget(parent)
    {
    	//---窗口大小  
    	resize(600, 400);
    	///---设置窗口标题
    	setWindowTitle("QTextEdit");
    
    	///------ 实例化 QTextEdit
    	textEdit = new QTextEdit();
    	textEdit->setFixedSize(600, 400);
    
    	///---------------------------------------------
    	cutBtn = new QPushButton("cut");
    	copyBtn = new QPushButton("copy");
    	pasteBtn = new QPushButton("paste");
    	undoBtn = new QPushButton("undo");
    	selectAllBtn = new QPushButton("select All");
    
    	///---绑定信号与槽
    	QObject::connect(cutBtn, SIGNAL(clicked()), textEdit, SLOT(undo()));
    	QObject::connect(copyBtn, SIGNAL(clicked()), textEdit, SLOT(copy()));
    	QObject::connect(pasteBtn, SIGNAL(clicked()), textEdit, SLOT(paste()));
    	QObject::connect(undoBtn, SIGNAL(clicked()), textEdit, SLOT(undo()));
    	QObject::connect(selectAllBtn, SIGNAL(clicked()), textEdit, SLOT(selectAll()));
    
    
    	///---水平布局按钮
    	QHBoxLayout *hLayout = new QHBoxLayout();
    	hLayout->addWidget(copyBtn);
    	hLayout->addWidget(cutBtn);
    	hLayout->addWidget(pasteBtn);
    	hLayout->addWidget(undoBtn);
    	hLayout->addWidget(selectAllBtn);
    	hLayout->setSpacing(10);
    	hLayout->setContentsMargins(10, 10, 10, 10);
    
    	///----将按钮 ,  textEdit 垂直布局
    	QVBoxLayout *vLayout = new QVBoxLayout();
    	vLayout->addLayout(hLayout);
    	vLayout->addWidget(textEdit);
    	vLayout->setSpacing(10);
    	vLayout->setContentsMargins(10, 10, 10, 10);
    
    	///---显示布局
    	this->setLayout(vLayout);
    }
    
    ///---析构函数 
    EditWidget::~EditWidget()
    {
    
    }

main.cpp

#include <QtWidgets/QApplication>
    #include "eidt_widget.h"
    
    int main(int argc, char *argv[])
    {
    	QApplication a(argc, argv);
    
    	EditWidget win;
    	win.show();
    
    	return a.exec();
    }

这里只是枚举了简单的几项操作，关于QTextEdit 对文本的字体选择，字体颜色等操作，请参考QT Assistant

![Center 1][]

[Center]: /images/20220731/620734b60e0f418e85ca11b51d23a817.png
[Center 1]: /images/20220731/2c153fa1677c407bbe053238d5bb66ee.png