Qt记录之QTabWidget的使用
作者：互联网
记录一下QTabWidget的一次使用
QTabWidget实现出来效果就是标签页的界面，点击一个标签，主界面就展现那个标签页的东西。
值得注意的就是以下几点：
1.QTabWidget::addTab(Widget,"title")，增加一个标签页。比如这个Widget为QPushButton,那个增加的标签页一整页就是一个按钮。
2.QTabWidget::setLayout(Layout)，这样设置，所有标签页也是这个布局了，要是Layout上有Widget，那么所有标签页都展示Layout上的Widget了。
3.例子里面，第一个标签页是Widget就是一个新建的QWidget类，要添加组件，就给这个Widget设置一个Layout，然后添加Widget到Layout上即可。第二个标签页是QListWidget，会自己读取目录，然后把目录中的文件，文件夹展示出来。
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QWidget>
#include <QTabWidget>
#include<QListWidgetItem>
#include<QListWidget>
#include<QDir>
#include<QEvent>
#include<QMenu>
#include<QFileSystemWatcher>
#include<QInputDialog>
#include<QDesktopServices>
#include<iostream>
#include<QApplication>
#include<QDesktopWidget>
#include<QLabel>
#include<QToolButton>
#include<QPushButton>
#include<QGridLayout>
#include<QGroupBox>
#include<QLineEdit>
#include<QListWidget>
#include<QListWidgetItem>
#include<QFileInfoList>
#include<QDir>
#include<QDebug>
#include<QFileDialog>
#include<QMessageBox>
#define QS(x) QString::fromLocal8Bit((x))
#define sQS(x) QString::fromLocal8Bit((x).data())
#define toStr(x) string(x.toLocal8Bit())
#define qsTQS(x) QUrl::fromLocalFile(x).toString()//.remove(0,8)
#define qsurlTQS(x) QUrl::fromLocalFile(x).url().remove(0,8)
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
private slots:
void chooseDir();
void chooseDirFromCurrentDir();
void finishCommit();
void slotDirShow(QListWidgetItem*);
void renameFile();
void deleteFile();
void copyFile();
void openFile();
void showFiledir();
private:
QTabWidget* m_tabUI;
bool m_showTab1;
bool m_showTab2;
bool m_showTab3;
bool m_showTab4;
bool m_showTab5;
QListWidget* file;
QDir* dir;
QMenu* menu;
QFileSystemWatcher* watcher;
protected:
bool Widget::eventFilter(QObject *watched, QEvent *event);
};
#endif // WIDGET_H
#include "widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
this->setWindowTitle("Tools");
this->setWindowFlags(Qt::Widget|Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
const int w = 400, h = 350;
const int x = (QApplication::desktop()->width() - w) >> 1;
const int y = (QApplication::desktop()->height() - h) >> 1;
this->setGeometry(x, y, w+40, h+20);
m_tabUI = new QTabWidget(this);
m_tabUI->setGeometry(x-460,y-200,w,h);
m_tabUI->show();
m_showTab1 = true;
m_showTab2 = false;
m_showTab3 = false;
m_showTab4 = false;
m_showTab5 = true;
if(m_showTab1)
{
QWidget* ui2Trans = new QWidget();
m_tabUI->addTab(ui2Trans,QS("Tab1"));
QGridLayout* mainLayout1 = new QGridLayout();
QGroupBox* box1 = new QGroupBox(QS("box1"));
QGridLayout* layout1 = new QGridLayout();
QLabel* label = new QLabel(QS("请选择文件："));
QLineEdit* lineEdit = new QLineEdit();
QPushButton* pushButton_open = new QPushButton(QS("打开目录"));
connect(pushButton_open,SIGNAL(clicked(bool)),this,SLOT(chooseDir()));
QPushButton* pushButton_choose = new QPushButton(QS("选择"));
connect(pushButton_choose,SIGNAL(clicked(bool)),this,SLOT(chooseDirFromCurrentDir()));
QPushButton* pushButton_trans = new QPushButton(QS("信息框"));
connect(pushButton_trans,SIGNAL(clicked(bool)),this,SLOT(finishCommit()));
layout1->addWidget(label,0,0);
layout1->addWidget(lineEdit,0,1);
layout1->addWidget(pushButton_open,0,3);
layout1->addWidget(pushButton_choose,0,5);
layout1->addWidget(pushButton_trans,0,7);
box1->setLayout(layout1);
mainLayout1->addWidget(box1,0,0);
QGroupBox* box2 = new QGroupBox(QS("box2"));
QGridLayout* layout2 = new QGridLayout();
QLabel* label_2 = new QLabel(QS("请选择文件："));
QLineEdit* lineEdit2 = new QLineEdit();
QPushButton* pushButton_open2 = new QPushButton(QS("打开目录"));
connect(pushButton_open2,SIGNAL(clicked(bool)),this,SLOT(chooseDir()));
QPushButton* pushButton_choose2 = new QPushButton(QS("选择"));
connect(pushButton_choose2,SIGNAL(clicked(bool)),this,SLOT(chooseDirFromCurrentDir()));
QPushButton* pushButton_trans2 = new QPushButton(QS("信息框"));
connect(pushButton_trans2,SIGNAL(clicked(bool)),this,SLOT(finishCommit()));
layout2->addWidget(label_2,0,0);
layout2->addWidget(lineEdit2,0,1);
layout2->addWidget(pushButton_open2,0,3);
layout2->addWidget(pushButton_choose2,0,5);
layout2->addWidget(pushButton_trans2,0,7);
box2->setLayout(layout2);
mainLayout1->addWidget(box2,1,0);
QGroupBox* box3 = new QGroupBox(QS("box3"));
QGridLayout* layout3 = new QGridLayout();
QLabel* label_3 = new QLabel(QS("请选择文件："));
QLineEdit* lineEdit3 = new QLineEdit();
QPushButton* pushButton_open3 = new QPushButton(QS("打开目录"));
connect(pushButton_open3,SIGNAL(clicked(bool)),this,SLOT(chooseDir()));
QPushButton* pushButton_choose3 = new QPushButton(QS("选择"));
connect(pushButton_choose3,SIGNAL(clicked(bool)),this,SLOT(chooseDirFromCurrentDir()));
QPushButton* pushButton_trans3 = new QPushButton(QS("信息框"));
connect(pushButton_trans3,SIGNAL(clicked(bool)),this,SLOT(finishCommit()));
layout3->addWidget(label_3,0,0);
layout3->addWidget(lineEdit3,0,1);
layout3->addWidget(pushButton_open3,0,3);
layout3->addWidget(pushButton_choose3,0,5);
layout3->addWidget(pushButton_trans3,0,7);
box3->setLayout(layout3);
mainLayout1->addWidget(box3,2,0);
QGroupBox* box4 = new QGroupBox(QS("box4"));
QGridLayout* layout4 = new QGridLayout();
QLabel* label_4 = new QLabel(QS("请选择文件："));
QLineEdit* lineEdit4 = new QLineEdit();
QPushButton* pushButton_open4 = new QPushButton(QS("打开目录"));
connect(pushButton_open4,SIGNAL(clicked(bool)),this,SLOT(chooseDir()));
QPushButton* pushButton_choose4 = new QPushButton(QS("选择"));
connect(pushButton_choose4,SIGNAL(clicked(bool)),this,SLOT(chooseDirFromCurrentDir()));
QPushButton* pushButton_trans4 = new QPushButton(QS("信息框"));
connect(pushButton_trans4,SIGNAL(clicked(bool)),this,SLOT(finishCommit()));
layout4->addWidget(label_4,0,0);
layout4->addWidget(lineEdit4,0,1);
layout4->addWidget(pushButton_open4,0,3);
layout4->addWidget(pushButton_choose4,0,5);
layout4->addWidget(pushButton_trans4,0,7);
box4->setLayout(layout4);
mainLayout1->addWidget(box4,3,0);
ui2Trans->setLayout(mainLayout1);
}
if(m_showTab5)
{
file = new QListWidget();
m_tabUI->addTab(file,QS("文件浏览"));
dir = new QDir();
qDebug()<<dir->path()<<endl;
showFiledir();
file->installEventFilter(this);
connect(file,SIGNAL(itemDoubleClicked(QListWidgetItem*)),this,SLOT(slotDirShow(QListWidgetItem*)));
menu = new QMenu(this);
QAction *rename = menu->addAction(QS("重命名此文件"));
connect(rename,SIGNAL(triggered(bool)), this, SLOT(renameFile()));
QAction *deletefile= menu->addAction(QS("删除文件"));
connect(deletefile,SIGNAL(triggered(bool)), this,SLOT(deleteFile()));
QAction* open = menu->addAction(QS("打开文件"));
connect(open,SIGNAL(triggered(bool)), this, SLOT(openFile()));
watcher = new QFileSystemWatcher(this);
watcher->addPath(dir->path());
connect(watcher,SIGNAL(directoryChanged(QString)),this,SLOT(showFiledir()));
QAction* copy = menu->addAction(QS("复制文件"));
connect(copy,SIGNAL(triggered(bool)), this, SLOT(copyFile()));
}
}
Widget::~Widget()
{
}
void Widget::chooseDir()
{
// QString path = QFileDialog::getExistingDirectory(this,"choose exe directory.","D:/");
QString path = QFileDialog::getOpenFileName(this,QString::fromLocal8Bit("打开exe文件"),"D:/","exe files(*.exe)");
qDebug()<<path<<endl;
}
void Widget::chooseDirFromCurrentDir()
{
// QString path = QFileDialog::getExistingDirectory(this,"choose cpp directory.","./");//打开文件夹用这个
//打开文件用下面这个
QString path = QFileDialog::getOpenFileName(this,QString::fromLocal8Bit("打开cpp文件"),"/","cpp files(*.cpp)");
qDebug()<<path<<endl;
}
void Widget::finishCommit()
{
QMessageBox::information(NULL,QS("提示"),QS("这是一个信息框！"),QMessageBox::Ok);
}
void Widget::slotDirShow(QListWidgetItem * item)
{
qDebug()<<item->whatsThis()<<endl;
if(item->whatsThis()=="file")
{
openFile();
return;
}
else if(item->whatsThis()!="dir")
{
return;
}
// return;
qDebug()<<"dir = "<<item->text()<<endl;
watcher->removePath(dir->path());//去掉之前路径的监视
dir->cd(item->text());
qDebug()<<dir->path()<<endl;
watcher->addPath(dir->path());//添加新路径的监视
showFiledir();//切换以后，重新展示即可
}
void Widget::renameFile()
{
bool ok = false;
QInputDialog* dialog = new QInputDialog();
dialog->setFixedSize(350,250);
dialog->setWindowTitle(QS("提示"));
// dialog->setGeometry(100,100,100,100);
dialog->setLabelText(QS("请输入新的文件名："));
dialog->setOkButtonText(QS("确认"));
dialog->setCancelButtonText(QS("取消"));
//前面设置的属性，一用getText就没用了。
QString filename = dialog->getText(NULL, QS("提示"),QS("请输入新的文件名："), QLineEdit::Normal,0, &ok);
if(filename.isEmpty())
{
return;
}
if(file->currentItem()->whatsThis()=="dir")
{
QString path = dir->path() + "/" + file->currentItem()->text();
qDebug()<<QS("重命名文件： ")<<path<<endl;
QString newpath = dir->path() + "/" + filename;
dir->rename(path,newpath);
}
else if(file->currentItem()->whatsThis()=="file")
{
QString path = dir->path() + "/" + file->currentItem()->text();
qDebug()<<QS("重命名文件： ")<<path<<endl;
QString newpath = dir->path() + "/" + filename;
dir->rename(path,newpath);
}
}
void Widget::deleteFile()
{
QString path = dir->path() + "/" + file->currentItem()->text();
qDebug()<<QS("删除文件： ")<<path<<endl;
if(file->currentItem()->whatsThis()=="dir")
{
dir->rmpath(path);
}
else if(file->currentItem()->whatsThis()=="file")
{
dir->remove(path);
}
}
void Widget::copyFile()
{
bool ok = false;
QInputDialog* dialog = new QInputDialog();
dialog->setFixedSize(350,250);
dialog->setWindowTitle(QS("提示"));
// dialog->setGeometry(100,100,100,100);
dialog->setLabelText(QS("请输入新的文件名："));
dialog->setOkButtonText(QS("确认"));
dialog->setCancelButtonText(QS("取消"));
// qDebug()<<dialog->textValue()<<endl;
QString filename = dialog->getText(NULL, QS("提示"),QS("请输入新的文件名："), QLineEdit::Normal,0, &ok);
if(filename.isEmpty())
{
return;
}
if(file->currentItem()->whatsThis()=="dir")
{
//文件夹复制需要多个文件，暂不处理
}
else if(file->currentItem()->whatsThis()=="file")
{
QString path = dir->path() + "/" + file->currentItem()->text();
qDebug()<<QS("复制文件： ")<<path<<endl;
QString newpath = dir->path() + "/" + filename;
QFile::copy(path,newpath);
}
}
void Widget::openFile()
{
qDebug()<<QS("打开文件")<<endl;
QString path = dir->path() + QS("/") + file->currentItem()->text();
qDebug()<<path<<endl;
// QDesktopServices::openUrl(path);
// path = path.toLocal8Bit().constData();
// path = QString::fromStdWString(data);
QDesktopServices::openUrl(qsTQS(path)); //中文文件打不开，就用这个宏定义就好了。
}
/*
* 重新展示文件夹
*/
void Widget::showFiledir()
{
file->clear();
QFileInfoList list = dir->entryInfoList(QDir::AllEntries|QDir::NoDot);
for(int i=0;i<list.count();i++)
{
QFileInfo tmpInfo = list.at(i);
if(tmpInfo.isDir())
{
QIcon icon("dir.png");
QString fileName = tmpInfo.fileName();
QListWidgetItem *tmp = new QListWidgetItem(icon,fileName);
tmp->setWhatsThis("dir");
file->addItem(tmp);
}
}
for(int i=0;i<list.count();i++)
{
QFileInfo tmpInfo = list.at(i);
if(tmpInfo.isFile())
{
QIcon icon("file.png");
QString fileName = tmpInfo.fileName();
QListWidgetItem *tmp = new QListWidgetItem(icon,fileName);
tmp->setWhatsThis("file");
file->addItem(tmp);
}
}
}
bool Widget::eventFilter(QObject *watched, QEvent *event)
{
// 右键弹出菜单
if (watched == (QObject*)file) {
if (event->type() == QEvent::ContextMenu) {
if(file->currentItem()!=NULL)//空白处不弹
{
menu->exec(QCursor::pos());
}
}
}
return QObject::eventFilter(watched, event);
}
标签：QS,Qt,记录,pushButton,bool,QPushButton,QTabWidget,new,include 来源： https://www.cnblogs.com/dayq/p/16024366.html