initial work on the model filter proxy

CMakeLists.txt

@@ -251,6 +251,7 @@ set(SRC_FILES
 	# Timeline
 	src/timeline/TimelineViewManager.cpp
 	src/timeline/TimelineModel.cpp
+	src/timeline/TimelineModelFilterProxy.cpp
 	src/timeline/DelegateChooser.cpp
 
 	# UI components
@@ -450,6 +451,7 @@ qt5_wrap_cpp(MOC_HEADERS
 
 	# Timeline
 	src/timeline/TimelineViewManager.h
+	src/timeline/TimelineModelFilterProxy.h
 	src/timeline/TimelineModel.h
 	src/timeline/DelegateChooser.h
 

resources/qml/TimelineView.qml

@@ -75,7 +75,7 @@ Item {
 		ListView {
 			id: chat
 
-			visible: timelineManager.timeline != null
+			// visible: timelineManager.timeline != null
 
 			anchors.left: parent.left
 			anchors.right: parent.right
@@ -85,7 +85,7 @@ Item {
 			anchors.leftMargin: 4
 			anchors.rightMargin: scrollbar.width
 
-			model: timelineManager.timeline
+			model: timelineManager.timeline.modelFilter;
 
 			boundsBehavior: Flickable.StopAtBounds
 			pixelAligned: true
@@ -179,7 +179,7 @@ Item {
 					bottomPadding: 4
 					spacing: 8
 
-					visible: !!modelData
+					// visible: !!modelData
 
 					width: parent.width
 					height: (section.includes(" ") ? dateBubble.height + 8 + userName.height : userName.height) + 8

src/timeline/TimelineModel.cpp

@@ -19,6 +19,7 @@
 #include "TimelineViewManager.h"
 #include "Utils.h"
 #include "dialogs/RawMessage.h"
+#include "TimelineModelFilterProxy.h"
 
 Q_DECLARE_METATYPE(QModelIndex)
 
@@ -132,6 +133,9 @@ TimelineModel::TimelineModel(TimelineViewManager *manager, QString room_id, QObj
   , room_id_(room_id)
   , manager_(manager)
 {
+        modelFilter = new TimelineModelFilterProxy();
+        modelFilter->setSourceModel(this);
+
         connect(
           this, &TimelineModel::oldMessagesRetrieved, this, &TimelineModel::addBackwardsEvents);
         connect(this, &TimelineModel::messageFailed, this, [this](QString txn_id) {

src/timeline/TimelineModel.h

@@ -9,6 +9,7 @@
 #include <mtxclient/http/errors.hpp>
 
 #include "CacheCryptoStructs.h"
+#include "TimelineModelFilterProxy.h"
 
 namespace mtx::http {
 using RequestErr = const std::optional<mtx::http::ClientError> &;
@@ -162,6 +163,7 @@ public:
         int rowCount(const QModelIndex &parent = QModelIndex()) const override;
         QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
         QVariant data(const QString &id, int role) const;
+        TimelineModelFilterProxy *modelFilter;
 
         bool canFetchMore(const QModelIndex &) const override;
         void fetchMore(const QModelIndex &) override;

src/timeline/TimelineModelFilterProxy.cpp

@@ -0,0 +1,37 @@
+/*
+ * <one line to give the program's name and a brief idea of what it does.>
+ * Copyright (C) 2020  thurloat <thurloat@protonmail.ch>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "TimelineModelFilterProxy.h"
+
+bool
+TimelineModelFilterProxy::filterAcceptsRow(int source_row, const QModelIndex& source_parent) const
+{
+    bool ret(true);
+
+    if (this->sourceModel() != nullptr) {
+        auto index = this->sourceModel()->index(source_row, 0, source_parent);
+        if (index.isValid()) {
+            auto value = index.data();
+            if (value.isValid()) {
+                ret = true;
+            }
+        }
+    }
+
+    return ret;
+}

src/timeline/TimelineModelFilterProxy.h

@@ -0,0 +1,48 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TIMELINEMODELFILTERPROXY_H
+#define TIMELINEMODELFILTERPROXY_H
+
+#include <qsortfilterproxymodel.h>
+
+#define UNUSED(...) (void)(__VA_ARGS__)
+
+/**
+ * @todo write docs
+ */
+class TimelineModelFilterProxy : public QSortFilterProxyModel
+{
+    Q_OBJECT
+
+public:
+    /**
+     * @todo write docs
+     */
+    TimelineModelFilterProxy(){};
+    virtual ~TimelineModelFilterProxy(){};
+
+    /**
+     * @todo write docs
+     *
+     * @param source_row TODO
+     * @param source_parent TODO
+     * @return TODO
+     */
+    bool filterAcceptsRow(int source_row, const QModelIndex& source_parent) const override;
+
+};
+
+#endif // TIMELINEMODELFILTERPROXY_H