added drag and drop support for image list

tabimages.cpp

@@ -1,8 +1,8 @@
-#include "mainwindow.h"
+#include <QMimeData>
+
 #include "tabimages.h"
 #include "ui_tabimages.h"
 
-extern MainWindow *mwindow;
 extern ImageList *images;
 
 TabImages::TabImages(QWidget *parent) :
@@ -17,6 +17,8 @@ TabImages::TabImages(QWidget *parent) :
 	ui->tblImages->resizeColumnsToContents();
 	ui->tblImages->resizeRowsToContents();
 
+	setAcceptDrops(true);
+
 	connect(ui->tblImages->verticalHeader(), &QHeaderView::sectionCountChanged, [&]() {
 		ui->tblImages->resizeColumnsToContents();
 		ui->tblImages->resizeRowsToContents();
@@ -27,6 +29,30 @@ TabImages::TabImages(QWidget *parent) :
 	connect(ui->btnSave,  &QPushButton::clicked, images, &ImageList::saveFilePicker);
 }
 
+void TabImages::dragEnterEvent(QDragEnterEvent *dee)
+{
+	dee->acceptProposedAction();
+}
+
+void TabImages::dropEvent(QDropEvent *de)
+{
+	const QMimeData* mimeData = de->mimeData();
+
+	// check for our needed mime type, here a file or a list of files
+	if (mimeData->hasUrls())
+	{
+		QStringList pathList;
+		QList<QUrl> urlList = mimeData->urls();
+
+		// extract the local paths of the files
+		for (QUrl url : urlList)
+			pathList += url.toLocalFile();
+
+		// call a function to open the files
+		images->load(pathList);
+	}
+}
+
 TabImages::~TabImages()
 {
 	delete ui;

tabimages.h

@@ -2,6 +2,8 @@
 #define TABIMAGES_H
 
 #include <QWidget>
+#include <QDragEnterEvent>
+#include <QDropEvent>
 
 #include "imagelist.h"
 
@@ -17,6 +19,10 @@ class TabImages : public QWidget
 		explicit TabImages(QWidget *parent = 0);
 		~TabImages();
 
+	protected:
+		void dropEvent(QDropEvent *de);
+		void dragEnterEvent(QDragEnterEvent *dee);
+
 	private:
 		Ui::TabImages *ui;
 };