使用 ui 和带有 qt 的 QTreeWidget 浏览目录

Question

我用 QT 设计器创建了一个 ui。

其中 ui 我使用一个按钮浏览目录，一个 lineedit 用于显示 select 目录路径文本，另一个按钮用于确定，这 3 个小部件和一个 treewidget 放在一个水平的分组框。

我想知道的是，如果我浏览并单击“确定”按钮，那么我想在 ui

上显示该路径的树视图

我的 test1.h 文件包含

#ifndef LINEEDIT_H
#define LINEEDIT_H

#include <QtGui>
#include "ui_line1.h"
#include <stdlib.h>
#include <iostream>
using namespace Ui;

class line : public QMainWindow 
{
    Q_OBJECT

public:
    line(QWidget *parent = 0);

    QTreeWidget(parent);

    void viewer(QTreeWidgetItem* item,QString filePath);

private:
    Ui::lineedit ui;
     QDirModel *model;
    public slots:
        void browse();
        void  treeview();
    void showDirectory(QTreeWidgetItem* item, int /*column*/);

};
#endif // LINEEDIT_H

我的 test1.cpp 文件包含

#include "test1.h"
#include <QTreeWidget>
#include <QtGui>
#include <stdlib.h>
#include <iostream>
#include<QWidget>
#include<QTreeWidgetItem>
line::line(QWidget* parent)
{
    ui.setupUi(this);
    connect(ui.browse, SIGNAL(clicked()), this,SLOT(browse()));
    connect(ui.ok, SIGNAL(clicked()), this,SLOT(treeview()));
    connect(this , SIGNAL(itemClicked(QTreeWidgetItem*,int)),this,SLOT(showDirectory(QTreeWidgetItem*,int)));
}   
void line::browse()
{   
    QString dir = QFileDialog::getExistingDirectory(this, tr("Open Directory"),
        "/home",QFileDialog::ShowDirsOnly   | QFileDialog::DontResolveSymlinks);
    ui.lineEdit->setText(dir);  
}
void line::treeview()
{   


    QWidget *centralWidget = new QWidget();
    line  *tree = new line (centralWidget);
    tree->setFixedSize(395,395);
    QTreeWidgetItem* headerItem = new QTreeWidgetItem();
    headerItem->setText(0,QString("File Name"));
    headerItem->setText(1,QString("Size (Bytes)"));
    headerItem->setText(2,QString("Path"));
    ui.treeWidget->setHeaderItem(headerItem);
     ui.treeWidget->setColumnCount(2);
    //ui.treeView->
    //setHeaderItem(headerItem);
    QString strdir=ui.lineEdit->text();
    QDir* rootDir = new QDir(strdir);
    QFileInfoList filesList = rootDir->entryInfoList();
    foreach(QFileInfo fileInfo, filesList)
    {
        QTreeWidgetItem* item = new QTreeWidgetItem();
        item->setText(0,fileInfo.fileName());
        if(fileInfo.isFile())
        {  
            item->setText(1,QString::number(fileInfo.size()));
            item->setIcon(0,*(new QIcon("file.jpg")));
        }
        if(fileInfo.isDir())
        {
            item->setIcon(0,*(new QIcon("folder.jpg")));
            viewer(item,fileInfo.filePath());
        } 
        item->setText(2,fileInfo.filePath());
        ui.treeWidget->addTopLevelItem(item);     
    }
    QPalette* palette = new QPalette();
    palette->setColor(QPalette::Base,Qt::red);  
    ui.treeWidget->setPalette(*(palette));
    /*window->setCentralWidget(centralWidget);*/
    /*ui.treeWidget->addTopLevelItem(centralWidget);*/
    /*window->show();*/
    return treeview();
}
void line::viewer(QTreeWidgetItem* item,QString filePath)
{
    QDir* rootDir = new QDir(filePath);
    QFileInfoList filesList = rootDir->entryInfoList();   
    foreach(QFileInfo fileInfo, filesList)
    {
        QTreeWidgetItem* child = new QTreeWidgetItem();
        child->setText(0,fileInfo.fileName());
        if(fileInfo.isFile())
        {  
            child->setText(1,QString::number(fileInfo.size()));
        }
        if(fileInfo.isDir())
        {
            child->setIcon(0,*(new QIcon("folder.jpg")));
            child->setText(2,fileInfo.filePath());
        }  
        item->addChild(child);
    }
}
void line::showDirectory(QTreeWidgetItem* item, int )
{
    QDir* rootDir = new QDir(item->text(2));
    QFileInfoList filesList = rootDir->entryInfoList();   
    foreach(QFileInfo fileInfo, filesList)
    {
        QTreeWidgetItem* child = new QTreeWidgetItem();
        child->setText(0,fileInfo.fileName());    
        if(fileInfo.isFile())
        {  
            child->setText(1,QString::number(fileInfo.size()));
            child->setIcon(0,*(new QIcon("file.jpg")));
        }
        if(fileInfo.isDir())
        {
            child->setIcon(0,*(new QIcon("folder.jpg")));
            child->setText(2,fileInfo.filePath());
        } 
        item->addChild(child);
        /*resizeColumnToContents(0);*/
    }
}

main.cpp 包含

#include "test1.h"
#include <QApplication>

int main(int argc, char *argv[])
{   
    QApplication a(argc, argv);
    line w;
    w.show();


    return a.exec();
}

我没有得到输出，同时我正在检查调试点，每一件事都很好，但没有在 ui treewidget

上得到输出

这可行吗，请帮我修改我的代码。

谢谢大家

Answer 1

test1.cppfile:

#include "test1.h"
#include <QTreeWidget>
#include <QtGui>
#include <stdlib.h>
#include <iostream>
#include<QWidget>
#include<QTreeWidgetItem>
line::line(QWidget* parent)
{
    ui.setupUi(this);
    connect(ui.browse, SIGNAL(clicked()), this,SLOT(browse()));
    connect(ui.ok, SIGNAL(clicked()), this,SLOT(treeview()));
    connect(this , SIGNAL(itemClicked(QTreeWidgetItem*,int)),this,SLOT(showDirectory(QTreeWidgetItem*,int)));
}   
void line::browse()
{   
    QString dir = QFileDialog::getExistingDirectory(this, tr("Open Directory"),
        "/home",QFileDialog::ShowDirsOnly   | QFileDialog::DontResolveSymlinks);
    ui.lineEdit->setText(dir);  
}
void line::treeview()
{   
    QString strdir=ui.lineEdit->text();
    QDir* rootDir = new QDir(strdir);
    QFileInfoList filesList = rootDir->entryInfoList();
    /*QTreeWidgetItem* item = new QTreeWidgetItem();*/
 ui.treeWidget->setColumnCount(1);
 QList<QTreeWidgetItem *> items;
 foreach(QFileInfo fileInfo, filesList)
    {
        QTreeWidgetItem* item = new QTreeWidgetItem();
        item->setText(0,fileInfo.fileName());
        if(fileInfo.isFile())
        {  
            item->setText(1,QString::number(fileInfo.size()));
            item->setIcon(0,*(new QIcon("file.jpg")));
            /*treeItem->setCurrentItem(item);*/
        }
        if(fileInfo.isDir())
        {
            item->setIcon(0,*(new QIcon("folder.jpg")));
            viewer(item,fileInfo.filePath());
        } 
        item->setText(2,fileInfo.filePath());
        ui.treeWidget->addTopLevelItem(item);   
        /* ui.treeWidget->insertTopLevelItems(0, item);*/
     items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("item: %1"))));
 ui.treeWidget->insertTopLevelItems(0, items);
 }
}
 void line::viewer(QTreeWidgetItem* item,QString filePath)
 {
    QDir* rootDir = new QDir(filePath);
    QFileInfoList filesList = rootDir->entryInfoList();   
    foreach(QFileInfo fileInfo, filesList)
    {
        QTreeWidgetItem* child = new QTreeWidgetItem();
        child->setText(0,fileInfo.fileName());
        if(fileInfo.isFile())
        {  
            child->setText(1,QString::number(fileInfo.size()));
        }
        if(fileInfo.isDir())
        {
            child->setIcon(0,*(new QIcon("folder.jpg")));
            child->setText(2,fileInfo.filePath());
        }  
        item->addChild(child);
        ui.treeWidget->addTopLevelItem(item);
    }
 }
 void line::showDirectory(QTreeWidgetItem* item, int )
 {
    QDir* rootDir = new QDir(item->text(2));
    QFileInfoList filesList = rootDir->entryInfoList();   
    foreach(QFileInfo fileInfo, filesList)
    {
        QTreeWidgetItem* child = new QTreeWidgetItem();
        child->setText(0,fileInfo.fileName());    
        if(fileInfo.isFile())
        {  
            child->setText(1,QString::number(fileInfo.size()));
            child->setIcon(0,*(new QIcon("file.jpg")));
        }
        if(fileInfo.isDir())
        {
            child->setIcon(0,*(new QIcon("folder.jpg")));
            child->setText(2,fileInfo.filePath());
        } 
        item->addChild(child);
        ui.treeWidget->addTopLevelItem(item);
        /*resizeColumnToContents(0);*/
    }


 }

test1.h 文件:

#ifndef LINEEDIT_H
#define LINEEDIT_H

#include <QtGui>
#include "ui_line1.h"
#include <stdlib.h>
#include <iostream>
using namespace Ui;

class line : public QMainWindow 
{
    Q_OBJECT

public:
    line(QWidget *parent = 0);

    QTreeWidget(parent);

    void viewer(QTreeWidgetItem* item,QString filePath);

private:
    Ui::lineedit ui;
     QDirModel *model;
    public slots:
        void browse();
        void  treeview();
    void showDirectory(QTreeWidgetItem* item, int /*column*/);

};
#endif // LINEEDIT_H

main.cpp 文件:

#include "test1.h"
#include <QApplication>

int main(int argc, char *argv[])
{   
    QApplication a(argc, argv);
    line w;
    w.show();


    return a.exec();
}

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