Implement Qml drag and drop

CMakeLists.txt

@@ -257,22 +257,23 @@ set(SRC_FILES
 	src/ui/Avatar.cpp
 	src/ui/Badge.cpp
 	src/ui/DropShadow.cpp
-	src/ui/LoadingIndicator.cpp
-	src/ui/InfoMessage.cpp
 	src/ui/FlatButton.cpp
 	src/ui/FloatingButton.cpp
+	src/ui/InfoMessage.cpp
 	src/ui/Label.cpp
+	src/ui/LoadingIndicator.cpp
+	src/ui/NhekoDropArea.cpp
 	src/ui/OverlayModal.cpp
-	src/ui/SnackBar.cpp
+	src/ui/OverlayWidget.cpp
 	src/ui/RaisedButton.cpp
 	src/ui/Ripple.cpp
 	src/ui/RippleOverlay.cpp
-	src/ui/OverlayWidget.cpp
+	src/ui/SnackBar.cpp
 	src/ui/TextField.cpp
 	src/ui/TextLabel.cpp
-	src/ui/ToggleButton.cpp
 	src/ui/Theme.cpp
 	src/ui/ThemeManager.cpp
+	src/ui/ToggleButton.cpp
 	src/ui/UserProfile.cpp
 
 	src/AvatarProvider.cpp
@@ -471,6 +472,7 @@ qt5_wrap_cpp(MOC_HEADERS
 	src/ui/Label.h
 	src/ui/FloatingButton.h
 	src/ui/Menu.h
+	src/ui/NhekoDropArea.h
 	src/ui/OverlayWidget.h
 	src/ui/SnackBar.h
 	src/ui/RaisedButton.h

resources/qml/MessageInput.qml

@@ -178,6 +178,11 @@ Rectangle {
                     onClicked: TimelineManager.timeline.input.paste(true)
                 }
 
+                NhekoDropArea {
+                    anchors.fill: parent
+                    roomid: TimelineManager.timeline.roomId()
+                }
+
                 background: Rectangle {
                     color: colors.window
                 }

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_; }

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;
 

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_; }

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>(

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 &);

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());
+                }
+        }
+}

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_;
+};