Qt: Add InfoProxyModel

Add an identity model, which can be used to display non-selectable
information at the end of any list

Change-Id: Iaca436f34cb8e5b251eb0dc00ea2c0ce1bd9e0e2
Reviewed-on: https://code.wireshark.org/review/25280
Petri-Dish: Roland Knall <rknall@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Roland Knall <rknall@gmail.com>

ui/qt/CMakeLists.txt

@@ -83,6 +83,7 @@ set(WIRESHARK_MODEL_HEADERS
 	models/export_objects_model.h
 	models/fileset_entry_model.h
 	models/html_text_delegate.h
+	models/info_proxy_model.h
 	models/interface_sort_filter_model.h
 	models/interface_tree_cache_model.h
 	models/interface_tree_model.h
@@ -306,6 +307,7 @@ set(WIRESHARK_MODEL_SRCS
 	models/export_objects_model.cpp
 	models/fileset_entry_model.cpp
 	models/html_text_delegate.cpp
+	models/info_proxy_model.cpp
 	models/interface_sort_filter_model.cpp
 	models/interface_tree_cache_model.cpp
 	models/interface_tree_model.cpp

ui/qt/Makefile.am

@@ -215,6 +215,7 @@ MOC_MODELS_HDRS = \
 	models/export_objects_model.h			\
 	models/fileset_entry_model.h			\
 	models/html_text_delegate.h			\
+	models/info_proxy_model.h			\
 	models/interface_sort_filter_model.h		\
 	models/interface_tree_cache_model.h		\
 	models/interface_tree_model.h			\
@@ -563,6 +564,7 @@ WIRESHARK_QT_MODELS_SRCS = \
 	models/export_objects_model.cpp			\
 	models/fileset_entry_model.cpp			\
 	models/html_text_delegate.cpp			\
+	models/info_proxy_model.cpp			\
 	models/interface_sort_filter_model.cpp		\
 	models/interface_tree_cache_model.cpp		\
 	models/interface_tree_model.cpp			\

ui/qt/models/info_proxy_model.cpp

@@ -0,0 +1,107 @@
+/* info_proxy_model.cpp
+ * Proxy model for displaying an info text at the end of any QAbstractListModel
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+
+#include <ui/qt/models/info_proxy_model.h>
+
+#include <QFont>
+
+InfoProxyModel::InfoProxyModel(int column, QObject * parent) : QIdentityProxyModel (parent)
+{
+    column_ = column;
+}
+
+InfoProxyModel::~InfoProxyModel()
+{
+    infos_.clear();
+}
+
+void InfoProxyModel::appendInfo(QString info)
+{
+    if ( ! infos_.contains(info) )
+        infos_ << info;
+}
+
+int InfoProxyModel::rowCount(const QModelIndex &parent) const
+{
+    return sourceModel()->rowCount(parent) + infos_.count();
+}
+
+QVariant InfoProxyModel::data (const QModelIndex &index, int role) const
+{
+    if ( ! index.isValid() )
+        return QVariant();
+
+    if ( index.row() < sourceModel()->rowCount() )
+        return sourceModel()->data(mapToSource(index), role);
+
+    int ifIdx = index.row() - sourceModel()->rowCount();
+    if ( index.column() != column_ || ifIdx < 0 || ifIdx >= infos_.count() )
+        return QVariant();
+
+    switch ( role )
+    {
+    case Qt::DisplayRole:
+        return infos_.at(ifIdx);
+        break;
+    case Qt::FontRole:
+        QFont font = QIdentityProxyModel::data(index, Qt::FontRole).value<QFont>();
+        font.setItalic(true);
+        return font;
+    }
+
+    return QIdentityProxyModel::data(index, role);
+}
+
+Qt::ItemFlags InfoProxyModel::flags(const QModelIndex &index) const
+{
+    if ( index.row() < sourceModel()->rowCount() )
+        return sourceModel()->flags(mapToSource(index));
+
+    return 0;
+}
+
+QModelIndex InfoProxyModel::index(int row, int column, const QModelIndex &parent) const
+{
+    if ( row >= sourceModel()->rowCount() && row < rowCount() )
+        return createIndex(row, column);
+
+    return QIdentityProxyModel::index(row, column, parent);
+}
+
+QModelIndex InfoProxyModel::mapToSource(const QModelIndex &proxyIndex) const
+{
+    if ( ! proxyIndex.isValid() )
+        return QModelIndex();
+
+    if ( proxyIndex.row() >= sourceModel()->rowCount() )
+        return QModelIndex();
+
+    return QIdentityProxyModel::mapToSource(proxyIndex);
+}
+
+QModelIndex InfoProxyModel::mapFromSource(const QModelIndex &fromIndex) const
+{
+    return QIdentityProxyModel::mapFromSource(fromIndex);
+}
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */

ui/qt/models/info_proxy_model.h

@@ -0,0 +1,58 @@
+/* info_proxy_model.h
+ * Proxy model for displaying an info text at the end of any QAbstractListModel
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef INFO_PROXY_MODEL_H
+#define INFO_PROXY_MODEL_H
+
+#include <config.h>
+
+#include <QStringList>
+#include <QIdentityProxyModel>
+
+class InfoProxyModel : public QIdentityProxyModel
+{
+    Q_OBJECT
+
+public:
+    explicit InfoProxyModel(int column, QObject * parent);
+    ~InfoProxyModel();
+
+    virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
+    virtual QVariant data (const QModelIndex &index, int role = Qt::DisplayRole) const;
+
+    virtual Qt::ItemFlags flags(const QModelIndex &index) const;
+    virtual QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
+
+    virtual QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
+    virtual QModelIndex mapFromSource(const QModelIndex &fromIndex) const;
+
+    void appendInfo(QString info);
+
+private:
+
+    int column_;
+
+    QStringList infos_;
+};
+
+#endif // INFO_PROXY_MODEL_H
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */