Qt实现简单的文件列表，类似资源管理器的图标浏览。

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QDir> #include <QMessageBox> #include "filehelper.h" #include <QToolButton> #include <QPoint> #include <QDebug> #include <QPixmap> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); } MainWindow::~MainWindow() { delete ui; } //一个页面 水平6张图，垂直2张图 QPoint MainWindow::getPicPostion(int width_pic, int height_pic, int idx) { int width = ui->scrollArea->width(); int height = ui->scrollArea->height(); int a = (width - 6 * width_pic) / 7; //6张图，7个空隙 int b = (height / 2 - 2 * height_pic) / 3; //两张图,3个空隙 int x = a + (a + width_pic) * (idx % 6); int y = b + (b + height_pic) * (idx / 6); return QPoint(x, y); } void MainWindow::on_pushButton_clicked() { //检索输入框内指定的路径，把里面的所有图片罗列出来 QString strFilePath = ui->lineEdit->text(); QDir dir(strFilePath); if(!dir.exists()){ QMessageBox box(this); box.setText(QString("路径%1不存在，请检查").arg(strFilePath)); box.exec(); } //搜索指令路径下的所有jpg和png图片。 QList<QString> filelList = FileHelper::ScanFilePath(strFilePath, "png, PNG, jpg, JPG"); if(filelList.count() <= 0){ return; } //清除之前加载的图片 QList<QToolButton*> btnList = ui->sa_content->findChildren<QToolButton*>(); if(btnList.count() > 0){ foreach (QToolButton *item, btnList) { delete item; } } //调整滚动条 ui->scrollArea->setWidgetResizable(false); int h = (pic_height + 70) * ((filelList.length() + 1) / 6 - 1); if(ui->sa_content->height() < h){ ui->sa_content->setGeometry(0, 0, ui->sa_content->width(), h); } //接下来，将所有图片以指定的大小，作为btn的背景，显示在页面上 int i = 0; foreach(QString picFile, filelList){ QToolButton *tb = new QToolButton(ui->sa_content); tb->setObjectName(QString("btnPic_%1").arg(i)); QPoint pt = getPicPostion(pic_width, pic_height, i); qDebug() << pt.x() << "," << pt.y(); tb->setGeometry(pt.x(), pt.y(), pic_width, pic_height); tb->setIconSize(QSize(pic_width, pic_height)); QPixmap iconImage(picFile); iconImage = iconImage.scaled(QSize(pic_width, pic_height), Qt::IgnoreAspectRatio, Qt::SmoothTransformation); tb->setIcon(QIcon(iconImage)); tb->setToolButtonStyle(Qt::ToolButtonIconOnly); //connect(tb, SIGNAL(clicked()), this, SLOT(showPicForm())); //用一个窗口显示图片 tb->show(); i++; } }