From c74077a41f5e89c0331d682b481408ad22d7ec78 Mon Sep 17 00:00:00 2001
From: Nicolas Werner <nicolas.werner@hotmail.de>
Date: Wed, 25 Nov 2020 17:02:23 +0100
Subject: Implement Qml drag and drop

---
 src/ChatPage.h                       |  1 +
 src/timeline/InputBar.cpp            |  8 ++++++++
 src/timeline/InputBar.h              |  2 ++
 src/timeline/TimelineViewManager.cpp |  3 +++
 src/timeline/TimelineViewManager.h   |  9 +++++++++
 src/ui/NhekoDropArea.cpp             | 39 ++++++++++++++++++++++++++++++++++++
 src/ui/NhekoDropArea.h               | 30 +++++++++++++++++++++++++++
 7 files changed, 92 insertions(+)
 create mode 100644 src/ui/NhekoDropArea.cpp
 create mode 100644 src/ui/NhekoDropArea.h

(limited to 'src')

diff --git a/src/ChatPage.h b/src/ChatPage.h
index 273ba4af..5b336cbb 100644
--- a/src/ChatPage.h
+++ b/src/ChatPage.h
@@ -88,6 +88,7 @@ public:
 
         QSharedPointer<UserSettings> userSettings() { return userSettings_; }
         CallManager *callManager() { return callManager_; }
+        TimelineViewManager *timelineManager() { return view_manager_; }
         void deleteConfigs();
 
         CommunitiesList *communitiesList() { return communitiesList_; }
diff --git a/src/timeline/InputBar.cpp b/src/timeline/InputBar.cpp
index b0d555b7..46bbd9a2 100644
--- a/src/timeline/InputBar.cpp
+++ b/src/timeline/InputBar.cpp
@@ -1,6 +1,7 @@
 #include "InputBar.h"
 
 #include <QClipboard>
+#include <QDropEvent>
 #include <QFileDialog>
 #include <QGuiApplication>
 #include <QMimeData>
@@ -44,6 +45,13 @@ InputBar::paste(bool fromMouse)
                 md = QGuiApplication::clipboard()->mimeData(QClipboard::Clipboard);
         }
 
+        if (md)
+                insertMimeData(md);
+}
+
+void
+InputBar::insertMimeData(const QMimeData *md)
+{
         if (!md)
                 return;
 
diff --git a/src/timeline/InputBar.h b/src/timeline/InputBar.h
index 939e8dad..27aa4bc3 100644
--- a/src/timeline/InputBar.h
+++ b/src/timeline/InputBar.h
@@ -9,6 +9,7 @@
 
 class TimelineModel;
 class QMimeData;
+class QDropEvent;
 class QStringList;
 
 class InputBar : public QObject
@@ -36,6 +37,7 @@ public slots:
 
         void send();
         void paste(bool fromMouse);
+        void insertMimeData(const QMimeData *data);
         void updateState(int selectionStart, int selectionEnd, int cursorPosition, QString text);
         void openFileSelection();
         bool uploading() const { return uploading_; }
diff --git a/src/timeline/TimelineViewManager.cpp b/src/timeline/TimelineViewManager.cpp
index 1392c505..866e7c51 100644
--- a/src/timeline/TimelineViewManager.cpp
+++ b/src/timeline/TimelineViewManager.cpp
@@ -1,6 +1,7 @@
 #include "TimelineViewManager.h"
 
 #include <QDesktopServices>
+#include <QDropEvent>
 #include <QMetaType>
 #include <QPalette>
 #include <QQmlContext>
@@ -20,6 +21,7 @@
 #include "dialogs/ImageOverlay.h"
 #include "emoji/EmojiModel.h"
 #include "emoji/Provider.h"
+#include "ui/NhekoDropArea.h"
 
 #include <iostream> //only for debugging
 
@@ -115,6 +117,7 @@ TimelineViewManager::TimelineViewManager(CallManager *callManager, ChatPage *par
 
         qmlRegisterType<DelegateChoice>("im.nheko", 1, 0, "DelegateChoice");
         qmlRegisterType<DelegateChooser>("im.nheko", 1, 0, "DelegateChooser");
+        qmlRegisterType<NhekoDropArea>("im.nheko", 1, 0, "NhekoDropArea");
         qmlRegisterUncreatableType<DeviceVerificationFlow>(
           "im.nheko", 1, 0, "DeviceVerificationFlow", "Can't create verification flow from QML!");
         qmlRegisterUncreatableType<UserProfile>(
diff --git a/src/timeline/TimelineViewManager.h b/src/timeline/TimelineViewManager.h
index 371e9af2..b9febf75 100644
--- a/src/timeline/TimelineViewManager.h
+++ b/src/timeline/TimelineViewManager.h
@@ -105,6 +105,15 @@ public slots:
         void initWithMessages(const std::vector<QString> &roomIds);
 
         void setHistoryView(const QString &room_id);
+        TimelineModel *getHistoryView(const QString &room_id)
+        {
+                auto room = models.find(room_id);
+                if (room != models.end())
+                        return room.value().data();
+                else
+                        return nullptr;
+        }
+
         void updateColorPalette();
         void queueReactionMessage(const QString &reactedEvent, const QString &reactionKey);
         void queueCallMessage(const QString &roomid, const mtx::events::msg::CallInvite &);
diff --git a/src/ui/NhekoDropArea.cpp b/src/ui/NhekoDropArea.cpp
new file mode 100644
index 00000000..14b71524
--- /dev/null
+++ b/src/ui/NhekoDropArea.cpp
@@ -0,0 +1,39 @@
+#include "NhekoDropArea.h"
+
+#include <QMimeData>
+
+#include "ChatPage.h"
+#include "timeline/InputBar.h"
+#include "timeline/TimelineModel.h"
+#include "timeline/TimelineViewManager.h"
+
+#include "Logging.h"
+
+NhekoDropArea::NhekoDropArea(QQuickItem *parent)
+  : QQuickItem(parent)
+{
+        setFlags(ItemAcceptsDrops);
+}
+
+void
+NhekoDropArea::dragEnterEvent(QDragEnterEvent *event)
+{
+        event->acceptProposedAction();
+}
+
+void
+NhekoDropArea::dragMoveEvent(QDragMoveEvent *event)
+{
+        event->acceptProposedAction();
+}
+
+void
+NhekoDropArea::dropEvent(QDropEvent *event)
+{
+        if (event) {
+                auto model = ChatPage::instance()->timelineManager()->getHistoryView(roomid_);
+                if (model) {
+                        model->input()->insertMimeData(event->mimeData());
+                }
+        }
+}
diff --git a/src/ui/NhekoDropArea.h b/src/ui/NhekoDropArea.h
new file mode 100644
index 00000000..b03620f2
--- /dev/null
+++ b/src/ui/NhekoDropArea.h
@@ -0,0 +1,30 @@
+#include <QQuickItem>
+
+class NhekoDropArea : public QQuickItem
+{
+        Q_OBJECT
+        Q_PROPERTY(QString roomid READ roomid WRITE setRoomid NOTIFY roomidChanged)
+public:
+        NhekoDropArea(QQuickItem *parent = nullptr);
+
+signals:
+        void roomidChanged(QString roomid);
+
+public slots:
+        void setRoomid(QString roomid)
+        {
+                if (roomid_ != roomid) {
+                        roomid_ = roomid;
+                        emit roomidChanged(roomid);
+                }
+        }
+        QString roomid() const { return roomid_; }
+
+protected:
+        void dragEnterEvent(QDragEnterEvent *event) override;
+        void dragMoveEvent(QDragMoveEvent *event) override;
+        void dropEvent(QDropEvent *event) override;
+
+private:
+        QString roomid_;
+};
-- 
cgit 1.5.1