From e00d8b6fca596e194ee16e571bba2f55a04a820d Mon Sep 17 00:00:00 2001
From: "Robert C. Helling" <helling@atdotde.de>
Date: Tue, 3 Nov 2015 21:17:50 +0100
Subject: [PATCH] Drag and Drop Images

Now that we have the possibility to add images without meaningful
time stamps to a dive, we should let the user provide that time
offset manually. This patch allowed pictures to be dragged from
the image list to the profile.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
---
 desktop-widgets/divepicturewidget.cpp | 30 ++++++++++++++++
 desktop-widgets/divepicturewidget.h   |  3 ++
 profile-widget/profilewidget2.cpp     | 66 +++++++++++++++++++++++++++++++++++
 profile-widget/profilewidget2.h       |  4 +++
 4 files changed, 103 insertions(+)

diff --git a/desktop-widgets/divepicturewidget.cpp b/desktop-widgets/divepicturewidget.cpp
index bed3d3b..daf62c6 100644
--- a/desktop-widgets/divepicturewidget.cpp
+++ b/desktop-widgets/divepicturewidget.cpp
@@ -14,6 +14,7 @@
 #include <mainwindow.h>
 #include <qthelper.h>
 #include <QStandardPaths>
+#include <QtWidgets>
 
 void loadPicture(struct picture *picture)
 {
@@ -98,3 +99,32 @@ void DivePictureWidget::doubleClicked(const QModelIndex &index)
 	QString filePath = model()->data(index, Qt::DisplayPropertyRole).toString();
 	emit photoDoubleClicked(localFilePath(filePath));
 }
+
+
+void DivePictureWidget::mousePressEvent(QMouseEvent *event)
+{
+
+	QPixmap pixmap = model()->data(indexAt(event->pos()), Qt::DecorationRole).value<QPixmap>();
+
+	QString filename = model()->data(indexAt(event->pos()), Qt::DisplayPropertyRole).toString();
+
+	QByteArray itemData;
+	QDataStream dataStream(&itemData, QIODevice::WriteOnly);
+	dataStream << filename << event->pos();
+
+	QMimeData *mimeData = new QMimeData;
+	mimeData->setData("application/x-subsurfaceimagedrop", itemData);
+
+	QDrag *drag = new QDrag(this);
+	drag->setMimeData(mimeData);
+	drag->setPixmap(pixmap);
+	drag->setHotSpot(event->pos() - rectForIndex(indexAt(event->pos())).topLeft());
+
+	QPixmap tempPixmap = pixmap;
+	QPainter painter;
+	painter.begin(&tempPixmap);
+	painter.fillRect(pixmap.rect(), QColor(127, 127, 127, 127));
+	painter.end();
+
+	drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction);
+}
diff --git a/desktop-widgets/divepicturewidget.h b/desktop-widgets/divepicturewidget.h
index 54f5bb8..f02d6b5 100644
--- a/desktop-widgets/divepicturewidget.h
+++ b/desktop-widgets/divepicturewidget.h
@@ -23,6 +23,9 @@ class DivePictureWidget : public QListView {
 	Q_OBJECT
 public:
 	DivePictureWidget(QWidget *parent);
+protected:
+	void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
+
 signals:
 	void photoDoubleClicked(const QString filePath);
 private
diff --git a/profile-widget/profilewidget2.cpp b/profile-widget/profilewidget2.cpp
index 6538185..550f2b2 100644
--- a/profile-widget/profilewidget2.cpp
+++ b/profile-widget/profilewidget2.cpp
@@ -16,6 +16,7 @@
 #include "divepicturemodel.h"
 #include "maintab.h"
 #include "diveplanner.h"
+#include "divelist.h"
 
 #include <libdivecomputer/parser.h>
 #include <QScrollBar>
@@ -30,6 +31,7 @@
 #endif
 #include "mainwindow.h"
 #include "preferences/preferencesdialog.h"
+#include <QtWidgets>
 
 /* This is the global 'Item position' variable.
  * it should tell you where to position things up
@@ -123,6 +125,8 @@ ProfileWidget2::ProfileWidget2(QWidget *parent) : QGraphicsView(parent),
 	scene()->installEventFilter(this);
 	connect(PreferencesDialog::instance(), SIGNAL(settingsChanged()), this, SLOT(settingsChanged()));
 	QAction *action = NULL;
+	setAcceptDrops(true);
+
 #define ADD_ACTION(SHORTCUT, Slot)                                  \
 	action = new QAction(this);                                 \
 	action->setShortcut(SHORTCUT);                              \
@@ -1840,3 +1844,65 @@ void ProfileWidget2::plotPictures()
 		pictures.push_back(item);
 	}
 }
+
+void ProfileWidget2::dropEvent(QDropEvent *event)
+{
+	if (event->mimeData()->hasFormat("application/x-subsurfaceimagedrop")) {
+		QByteArray itemData = event->mimeData()->data("application/x-subsurfaceimagedrop");
+		QDataStream dataStream(&itemData, QIODevice::ReadOnly);
+
+		QString filename;
+		QPoint offset;
+		dataStream >> filename >> offset;
+
+		QPointF mappedPos = mapToScene(event->pos());
+
+		FOR_EACH_PICTURE(current_dive) {
+			if (QString(picture->filename) == filename) {
+				picture->offset.seconds = timeAxis->valueAt(mappedPos);
+				mark_divelist_changed(true);
+				break;
+			}
+		}
+		copy_dive(current_dive, &displayed_dive);
+		DivePictureModel::instance()->updateDivePictures();
+
+
+		if (event->source() == this) {
+			event->setDropAction(Qt::MoveAction);
+			event->accept();
+		} else {
+			event->acceptProposedAction();
+		}
+	} else {
+		event->ignore();
+	}
+}
+
+void ProfileWidget2::dragEnterEvent(QDragEnterEvent *event)
+{
+	if (event->mimeData()->hasFormat("application/x-subsurfaceimagedrop")) {
+		if (event->source() == this) {
+			event->setDropAction(Qt::MoveAction);
+			event->accept();
+		} else {
+			event->acceptProposedAction();
+		}
+	} else {
+		event->ignore();
+	}
+}
+
+void ProfileWidget2::dragMoveEvent(QDragMoveEvent *event)
+{
+	if (event->mimeData()->hasFormat("application/x-subsurfaceimagedrop")) {
+		if (event->source() == this) {
+			event->setDropAction(Qt::MoveAction);
+			event->accept();
+		} else {
+			event->acceptProposedAction();
+		}
+	} else {
+		event->ignore();
+	}
+}
diff --git a/profile-widget/profilewidget2.h b/profile-widget/profilewidget2.h
index ce3fda0..4142822 100644
--- a/profile-widget/profilewidget2.h
+++ b/profile-widget/profilewidget2.h
@@ -134,6 +134,10 @@ protected:
 	virtual void mouseDoubleClickEvent(QMouseEvent *event);
 	virtual void mousePressEvent(QMouseEvent *event);
 	virtual void mouseReleaseEvent(QMouseEvent *event);
+	void dropEvent(QDropEvent *event) Q_DECL_OVERRIDE;
+	void dragEnterEvent(QDragEnterEvent *event) Q_DECL_OVERRIDE;
+	void dragMoveEvent(QDragMoveEvent *event) Q_DECL_OVERRIDE;
+
 
 private: /*methods*/
 	void fixBackgroundPos();
-- 
1.9.5 (Apple Git-50.3)