add drop

leichaojian · Nov 17, 2014 · ef75cb0 · ef75cb0
1 parent cea3916
commit ef75cb0
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diff --git a/drop/drop.pro b/drop/drop.pro
@@ -0,0 +1,20 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2014-11-17T19:23:49
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = drop
+TEMPLATE = app
+
+
+SOURCES += main.cpp\
+        mainwindow.cpp
+
+HEADERS  += mainwindow.h
+
+FORMS    += mainwindow.ui
diff --git a/drop/drop.pro.user b/drop/drop.pro.user
@@ -0,0 +1,255 @@
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diff --git a/drop/main.cpp b/drop/main.cpp
@@ -0,0 +1,11 @@
+#include "mainwindow.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+}
diff --git a/drop/mainwindow.cpp b/drop/mainwindow.cpp
@@ -0,0 +1,49 @@
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+
+MainWindow::MainWindow(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+
+    textEdit = new QTextEdit;
+    setCentralWidget(textEdit);
+
+    //设定为只读
+    textEdit->setReadOnly(true);
+
+    //支持拖放
+    setAcceptDrops(true);
+
+    setWindowTitle(tr("text editor"));
+}
+
+MainWindow::~MainWindow()
+{
+    delete ui;
+}
+
+//当用户拖动文件到窗口部件上时候，就会触发dragEnterEvent事件
+void MainWindow::dragEnterEvent(QDragEnterEvent *event)
+{
+    //如果为文件，则支持拖放
+    if (event->mimeData()->hasFormat("text/uri-list"))
+        event->acceptProposedAction();
+}
+
+//当用户放下这个文件后，就会触发dropEvent事件
+void MainWindow::dropEvent(QDropEvent *event)
+{
+    //注意：这里如果有多文件存在，意思是用户一下子拖动了多个文件，而不是拖动一个目录
+    //如果想读取整个目录，则在不同的操作平台下，自己编写函数实现读取整个目录文件名
+    QList<QUrl> urls = event->mimeData()->urls();
+    if(urls.isEmpty())
+        return;
+
+    //往文本框中追加文件名
+    foreach(QUrl url, urls) {
+        QString file_name = url.toLocalFile();
+        textEdit->append(file_name);
+    }
+}