just proxying button event from feed view delegate to the feed model

ui/utils/feedview.cpp

@@ -24,6 +24,7 @@
 #include <QDebug>
 
 #include "messagedelegate.h"
+#include "ui/models/messagefeed.h"
 
 constexpr int maxMessageHeight = 10000;
 constexpr int approximateSingleMessageHeight = 20;
@@ -33,6 +34,7 @@ FeedView::FeedView(QWidget* parent):
     hints(),
     vo(0),
     specialDelegate(false),
+    specialModel(false),
     clearWidgetsMode(false)
 {
     horizontalScrollBar()->setRange(0, 0);
@@ -231,7 +233,7 @@ void FeedView::paintEvent(QPaintEvent* event)
     QPoint cursor = vp->mapFromGlobal(QCursor::pos());
     
     if (clearWidgetsMode && specialDelegate) {
-        MessageDelegate* del = dynamic_cast<MessageDelegate*>(itemDelegate());
+        MessageDelegate* del = static_cast<MessageDelegate*>(itemDelegate());
         del->beginClearWidgets();
     }
     
@@ -242,7 +244,7 @@ void FeedView::paintEvent(QPaintEvent* event)
     }
     
     if (clearWidgetsMode && specialDelegate) {
-        MessageDelegate* del = dynamic_cast<MessageDelegate*>(itemDelegate());
+        MessageDelegate* del = static_cast<MessageDelegate*>(itemDelegate());
         del->endClearWidgets();
         clearWidgetsMode = false;
     }
@@ -276,12 +278,43 @@ QFont FeedView::getFont() const
 
 void FeedView::setItemDelegate(QAbstractItemDelegate* delegate)
 {
+    if (specialDelegate) {
+        MessageDelegate* del = static_cast<MessageDelegate*>(itemDelegate());
+        disconnect(del, &MessageDelegate::buttonPushed, this, &FeedView::onMessageButtonPushed);
+    }
+    
     QAbstractItemView::setItemDelegate(delegate);
     
     MessageDelegate* del = dynamic_cast<MessageDelegate*>(delegate);
     if (del) {
         specialDelegate = true;
+        connect(del, &MessageDelegate::buttonPushed, this, &FeedView::onMessageButtonPushed);
     } else {
         specialDelegate = false;
     }
 }
+
+void FeedView::setModel(QAbstractItemModel* model)
+{
+    QAbstractItemView::setModel(model);
+    
+    Models::MessageFeed* feed = dynamic_cast<Models::MessageFeed*>(model);
+    if (feed) {
+        specialModel = true;
+    } else {
+        specialModel = false;
+    }
+}
+
+void FeedView::onMessageButtonPushed(const QString& messageId, bool download)
+{
+    if (specialModel) {
+        Models::MessageFeed* feed = static_cast<Models::MessageFeed*>(model());
+        
+        if (download) {
+            feed->downloadAttachment(messageId);
+        } else {
+            feed->uploadAttachment(messageId);
+        }
+    }
+}

ui/utils/feedview.h

@@ -43,6 +43,7 @@ public:
     void setSelection(const QRect & rect, QItemSelectionModel::SelectionFlags command) override;
     QRegion visualRegionForSelection(const QItemSelection & selection) const override;
     void setItemDelegate(QAbstractItemDelegate* delegate);
+    void setModel(QAbstractItemModel * model) override;
     
     QFont getFont() const;
     
@@ -51,6 +52,7 @@ public slots:
 protected slots:
     void rowsInserted(const QModelIndex & parent, int start, int end) override;
     void verticalScrollbarValueChanged(int value) override;
+    void onMessageButtonPushed(const QString& messageId, bool download);
     
 protected:
     int verticalOffset() const override;
@@ -71,6 +73,7 @@ private:
     std::deque<Hint> hints;
     int vo;
     bool specialDelegate;
+    bool specialModel;
     bool clearWidgetsMode;
     
 };

ui/utils/messagedelegate.cpp

@@ -253,6 +253,7 @@ QPushButton * MessageDelegate::getButton(const Models::FeedItem& data) const
             result->download = false;
         }
         buttons->insert(std::make_pair(data.id, result));
+        connect(result, &QPushButton::clicked, this, &MessageDelegate::onButtonPushed);
     }
     
     return result;
@@ -285,6 +286,11 @@ void MessageDelegate::endClearWidgets()
     }
 }
 
+void MessageDelegate::onButtonPushed() const
+{
+    FeedButton* btn = static_cast<FeedButton*>(sender());
+    emit buttonPushed(btn->messageId, btn->download);
+}
 
 // void MessageDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
 // {

ui/utils/messagedelegate.h

@@ -50,10 +50,16 @@ public:
     void endClearWidgets();
     void beginClearWidgets();
     
+signals:
+    void buttonPushed(const QString& messageId, bool download) const;
+    
 protected:
     void paintButton(QPushButton* btn, QPainter* painter, bool sentByMe, QStyleOptionViewItem& option) const;
     QPushButton* getButton(const Models::FeedItem& data) const;
     
+protected slots:
+    void onButtonPushed() const;
+    
 private:
     class FeedButton : public QPushButton {
     public: