Implemented message window to report compilation errors.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

10 files changed, 620 insertions, 42 deletions

diff --git a/qtmips_gui/MainWindow.ui b/qtmips_gui/MainWindow.ui
index cd898ae..aa01737 100644
--- a/qtmips_gui/MainWindow.ui
+++ b/qtmips_gui/MainWindow.ui
@@ -83,6 +83,7 @@
     <addaction name="actionLcdDisplay"/>
     <addaction name="actionCop0State"/>
     <addaction name="actionCore_View_show"/>
+    <addaction name="actionMessages"/>
    </widget>
    <widget class="QMenu" name="menuMachine">
     <property name="title">
@@ -527,6 +528,14 @@
     <string>Core View</string>
    </property>
   </action>
+  <action name="actionMessages">
+   <property name="text">
+    <string>Messages</string>
+   </property>
+   <property name="toolTip">
+    <string>Show compile/build messages</string>
+   </property>
+  </action>
   <action name="actionMnemonicRegisters">
    <property name="checkable">
     <bool>true</bool>
diff --git a/qtmips_gui/mainwindow.cpp b/qtmips_gui/mainwindow.cpp
index 775d926..0498ff3 100644
--- a/qtmips_gui/mainwindow.cpp
+++ b/qtmips_gui/mainwindow.cpp
@@ -94,6 +94,8 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) {
     lcd_display->hide();
     cop0dock = new Cop0Dock(this);
     cop0dock->hide();
+    messages = new MessagesDock(this, settings);
+    messages->hide();
 
     // Execution speed actions
     speed_group = new QActionGroup(this);
@@ -128,6 +130,7 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) {
     connect(ui->actionLcdDisplay, SIGNAL(triggered(bool)), this, SLOT(show_lcd_display()));
     connect(ui->actionCop0State, SIGNAL(triggered(bool)), this, SLOT(show_cop0dock()));
     connect(ui->actionCore_View_show, SIGNAL(triggered(bool)), this, SLOT(show_hide_coreview(bool)));
+    connect(ui->actionMessages, SIGNAL(triggered(bool)), this, SLOT(show_messages()));
     connect(ui->actionAbout, SIGNAL(triggered(bool)), this, SLOT(about_qtmips()));
     connect(ui->actionAboutQt, SIGNAL(triggered(bool)), this, SLOT(about_qt()));
     connect(ui->ips1, SIGNAL(toggled(bool)), this, SLOT(set_speed()));
@@ -137,6 +140,12 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) {
     connect(ui->ipsUnlimited, SIGNAL(toggled(bool)), this, SLOT(set_speed()));
     connect(ui->ipsMax, SIGNAL(toggled(bool)), this, SLOT(set_speed()));
 
+    connect(this, SIGNAL(report_message(messagetype::Type,QString,int,int,QString,QString)),
+            messages, SLOT(insert_line(messagetype::Type,QString,int,int,QString,QString)));
+    connect(this, SIGNAL(clear_messages()), messages, SLOT(clear_messages()));
+    connect(messages, SIGNAL(message_selected(messagetype::Type,QString,int,int,QString,QString)),
+            this, SLOT(message_selected(messagetype::Type,QString,int,int,QString,QString)));
+
     // Restore application state from settings
     restoreState(settings->value("windowState").toByteArray());
     restoreGeometry(settings->value("windowGeometry").toByteArray());
@@ -359,6 +368,7 @@ SHOW_HANDLER(peripherals, Qt::RightDockWidgetArea)
 SHOW_HANDLER(terminal, Qt::RightDockWidgetArea)
 SHOW_HANDLER(lcd_display, Qt::RightDockWidgetArea)
 SHOW_HANDLER(cop0dock, Qt::RightDockWidgetArea)
+SHOW_HANDLER(messages, Qt::BottomDockWidgetArea)
 #undef SHOW_HANDLER
 
 void MainWindow::show_symbol_dialog(){
@@ -529,6 +539,37 @@ void MainWindow::update_open_file_list() {
     settings->setValue("openSrcFiles", open_src_files);
 }
 
+SrcEditor *MainWindow::source_editor_for_file(QString filename, bool open) {
+    if ((central_window == nullptr) || (settings == nullptr))
+        return nullptr;
+    bool found = false;
+    SrcEditor *editor = nullptr;
+    for (int i = 0; i < central_window->count(); i++) {
+        QWidget *w = central_window->widget(i);
+        editor = dynamic_cast<SrcEditor *>(w);
+        if (editor == nullptr)
+            continue;
+        if (editor->filename() == filename) {
+            found = true;
+            break;
+        }
+    }
+    if (found)
+        return editor;
+
+    if (!open)
+        return nullptr;
+
+    editor = new SrcEditor();
+    if (!editor->loadFile(filename)) {
+        delete editor;
+        return nullptr;
+    }
+    add_src_editor_to_tabs(editor);
+    update_open_file_list();
+    return editor;
+}
+
 void MainWindow::new_source() {
     SrcEditor *editor = new SrcEditor();
     add_src_editor_to_tabs(editor);
@@ -633,6 +674,23 @@ void MainWindow::close_source() {
     update_open_file_list();
 }
 
+void MainWindow::message_selected(messagetype::Type type, QString file, int line,
+                      int column, QString text, QString hint) {
+
+    (void)type;
+    (void)column;
+    (void)text;
+    (void)hint;
+
+    SrcEditor *editor = source_editor_for_file(file, true);
+    if (editor == nullptr)
+        return;
+    editor->setCursorToLine(line);
+    editor->setFocus();
+    if (central_window != nullptr)
+        central_window->setCurrentWidget(editor);
+}
+
 class SymbolTableDb : public fixmatheval::FmeSymbolDb {
 public:
     SymbolTableDb(const machine::SymbolTable *symtab);
@@ -683,12 +741,15 @@ void MainWindow::compile_source() {
         QMessageBox::critical(this, "QtMips Error", tr("No physical addresspace to store program."));
         return;
     }
+    QString filename = current_srceditor->filename();
     machine->cache_sync();
     SrcEditor *editor = current_srceditor;
     QTextDocument *doc = editor->document();
     std::uint32_t address = 0x80020000;
     machine::RelocExpressionList reloc;
 
+    emit clear_messages();
+
     int ln = 1;
     for ( QTextBlock block = doc->begin(); block.isValid(); block = block.next(), ln++) {
         QString error;
@@ -740,10 +801,9 @@ void MainWindow::compile_source() {
                 ok = expression.eval(value, &symtab, error);
             if (!ok) {
                 error_line = ln;
-                editor->setCursorToLine(error_line);
-                QMessageBox::critical(this, "QtMips Error",
-                                  tr("line %1 .orig %2 parse error.")
-                                  .arg(QString::number(ln), line));
+                emit report_message(messagetype::ERROR, filename, ln, 0,
+                               tr("line %1 .orig %2 parse error.")
+                               .arg(QString::number(ln), line), "");
                 break;
             }
             address = value;
@@ -753,11 +813,10 @@ void MainWindow::compile_source() {
             QStringList operands = line.mid(op.size()).split(",");
             if ((operands.count() > 2) || (operands.count() < 1)) {
                 error_line = ln;
-                editor->setCursorToLine(error_line);
-                QMessageBox::critical(this, "QtMips Error",
-                                  tr("line %1 .set or .equ incorrect arguments number.")
-                                  .arg(QString::number(ln)));
-                break;
+                emit report_message(messagetype::ERROR, filename, ln, 0,
+                               tr("line %1 .set or .equ incorrect arguments number.")
+                               .arg(QString::number(ln)), "");
+                continue;
             }
             QString name = operands.at(0).trimmed();
             if ((name == "noat") || (name == "noreored"))
@@ -771,11 +830,10 @@ void MainWindow::compile_source() {
                     ok = expression.eval(value, &symtab, error);
                 if (!ok) {
                     error_line = ln;
-                    editor->setCursorToLine(error_line);
-                    QMessageBox::critical(this, "QtMips Error",
+                    emit report_message(messagetype::ERROR, filename, ln, 0,
                                   tr("line %1 .set or .equ %2 parse error.")
-                                  .arg(QString::number(ln), operands.at(1)));
-                    break;
+                                  .arg(QString::number(ln), operands.at(1)), "");
+                    continue;
                 }
             }
             machine->set_symbol(name, value, 0);
@@ -803,11 +861,10 @@ void MainWindow::compile_source() {
                                                  address, &reloc, ln, true);
         if (size < 0) {
             error_line = ln;
-            editor->setCursorToLine(error_line);
-            QMessageBox::critical(this, "QtMips Error",
+            emit report_message(messagetype::ERROR, filename, ln, 0,
                               tr("line %1 instruction %2 parse error - %3.")
-                              .arg(QString::number(ln), line, error));
-            break;
+                              .arg(QString::number(ln), line, error), "");
+            continue;
         }
         std::uint32_t *p = inst;
         for (ssize_t l = 0; l < size; l += 4) {
@@ -819,36 +876,27 @@ void MainWindow::compile_source() {
         QString error;
         fixmatheval::FmeExpression expression;
         if (!expression.parse(r->expression, error)) {
-            if (!error_line) {
-                error_line = r->line;
-                editor->setCursorToLine(error_line);
-                QMessageBox::critical(this, "QtMips Error",
-                                  tr("expression parse error %1 at line %2, expression %3.")
-                                  .arg(error, QString::number(r->line), expression.dump()));
-            }
+            error_line = r->line;
+            emit report_message(messagetype::ERROR, filename, ln, 0,
+                                tr("expression parse error %1 at line %2, expression %3.")
+                                .arg(error, QString::number(r->line), expression.dump()), "");
         } else {
             fixmatheval::FmeValue value;
             if (!expression.eval(value, &symtab, error)) {
-                if (!error_line) {
-                    error_line = r->line;
-                    editor->setCursorToLine(error_line);
-                    QMessageBox::critical(this, "QtMips Error",
-                                      tr("expression evalution error %1 at line %2 , expression %3.")
-                                      .arg(error, QString::number(r->line), expression.dump()));
-                }
+                error_line = r->line;
+                emit report_message(messagetype::ERROR, filename, ln, 0,
+                               tr("expression evalution error %1 at line %2 , expression %3.")
+                               .arg(error, QString::number(r->line), expression.dump()), "");
             } else {
                 if (false)
-                    QMessageBox::information(this, "QtMips info",
-                                         expression.dump() + " -> " + QString::number(value));
+                    emit report_message(messagetype::INFO, filename, ln, 0,
+                                   expression.dump() + " -> " + QString::number(value), "");
                 machine::Instruction inst(mem->read_word(r->location, true));
                 if (!inst.update(value, r)) {
-                    if (!error_line) {
-                        error_line = r->line;
-                        editor->setCursorToLine(error_line);
-                        QMessageBox::critical(this, "QtMips Error",
-                                          tr("instruction update error %1 at line %2, expression %3 -> value %4.")
-                                          .arg(error, QString::number(r->line), expression.dump(), QString::number(value)));
-                    }
+                    error_line = r->line;
+                    emit report_message(messagetype::ERROR, filename, ln, 0,
+                                   tr("instruction update error %1 at line %2, expression %3 -> value %4.")
+                                   .arg(error, QString::number(r->line), expression.dump(), QString::number(value)), "");
                 }
                 mem->write_word(r->location, inst.data());
             }
@@ -859,4 +907,7 @@ void MainWindow::compile_source() {
     }
 
     emit mem->external_change_notify(mem, 0, 0xffffffff, true);
+
+    if (error_line != 0)
+        show_messages();
 }
diff --git a/qtmips_gui/mainwindow.h b/qtmips_gui/mainwindow.h
index bd1aa80..95b3b59 100644
--- a/qtmips_gui/mainwindow.h
+++ b/qtmips_gui/mainwindow.h
@@ -50,6 +50,7 @@
 #include "terminaldock.h"
 #include "lcddisplaydock.h"
 #include "cop0dock.h"
+#include "messagesdock.h"
 
 #include "qtmipsmachine.h"
 #include "machineconfig.h"
@@ -67,6 +68,11 @@ public:
 
     bool configured();
 
+signals:
+    void report_message(messagetype::Type type, QString file, int line,
+                                   int column, QString text, QString hint);
+    void clear_messages();
+
 public slots:
     // Actions signals
     void new_machine();
@@ -89,6 +95,7 @@ public slots:
     void show_cop0dock();
     void show_hide_coreview(bool show);
     void show_symbol_dialog();
+    void show_messages();
     // Actions - help menu
     void about_qtmips();
     void about_qt();
@@ -101,6 +108,7 @@ public slots:
     void central_tab_changed(int index);
     void tab_widget_destroyed(QObject *obj);
     void view_mnemonics_registers(bool enable);
+    void message_selected(messagetype::Type type, QString file, int line, int column, QString text, QString hint);
 
 protected:
     void closeEvent(QCloseEvent *event);
@@ -126,6 +134,7 @@ private:
     TerminalDock *terminal;
     LcdDisplayDock *lcd_display;
     Cop0Dock *cop0dock;
+    MessagesDock *messages;
     bool coreview_shown;
     SrcEditor  *current_srceditor;
 
@@ -138,6 +147,7 @@ private:
     void show_dockwidget(QDockWidget *w, Qt::DockWidgetArea area = Qt::RightDockWidgetArea);
     void add_src_editor_to_tabs(SrcEditor *editor);
     void update_open_file_list();
+    SrcEditor *source_editor_for_file(QString filename, bool open);
 };
 
 #endif // MAINWINDOW_H
diff --git a/qtmips_gui/messagesdock.cpp b/qtmips_gui/messagesdock.cpp
new file mode 100644
index 0000000..d897e3f
--- /dev/null
+++ b/qtmips_gui/messagesdock.cpp
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ *   B35APO - Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ *   B4M35PAP - Advanced Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019      Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University        (http://www.cvut.cz/)
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#include <QWidget>
+#include <QPushButton>
+#include <QVBoxLayout>
+#include <QTableView>
+#include <QComboBox>
+#include <QHeaderView>
+#include <QMessageBox>
+#include <QSettings>
+
+#include "messagesdock.h"
+#include "messagesmodel.h"
+#include "messagesview.h"
+#include "messagetype.h"
+#include "hexlineedit.h"
+
+
+
+MessagesDock::MessagesDock(QWidget *parent, QSettings *settings) : Super(parent) {
+    setObjectName("Messages");
+    setWindowTitle("Messages");
+
+    this->settings = settings;
+
+    QWidget *content = new QWidget();
+
+    QListView *messages_content = new MessagesView(0, settings);
+    MessagesModel *messages_model = new MessagesModel(0);
+    messages_content->setModel(messages_model);
+
+    QVBoxLayout *layout = new QVBoxLayout;
+    layout->addWidget(messages_content);
+
+    content->setLayout(layout);
+
+    setWidget(content);
+
+    connect(this, SIGNAL(report_message(messagetype::Type,QString,int,int,QString,QString)),
+    messages_model, SLOT(insert_line(messagetype::Type,QString,int,int,QString,QString)));
+    connect(this, SIGNAL(pass_clear_messages()), messages_model, SLOT(clear_messages()));
+    connect(messages_content, SIGNAL(activated(QModelIndex)), messages_model, SLOT(activated(QModelIndex)));
+    connect(messages_model, SIGNAL(message_selected(messagetype::Type,QString,int,int,QString,QString)),
+            this, SIGNAL(message_selected(messagetype::Type,QString,int,int,QString,QString)));
+}
+
+void MessagesDock::insert_line(messagetype::Type type, QString file, int line,
+                               int column, QString text, QString hint) {
+    report_message(type, file, line, column, text, hint);
+}
+
+void MessagesDock::clear_messages() {
+    emit pass_clear_messages();
+}
diff --git a/qtmips_gui/messagesdock.h b/qtmips_gui/messagesdock.h
new file mode 100644
index 0000000..6cbf36e
--- /dev/null
+++ b/qtmips_gui/messagesdock.h
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ *   B35APO - Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ *   B4M35PAP - Advanced Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019      Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University        (http://www.cvut.cz/)
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#ifndef MESSAGESDOCK_H
+#define MESSAGESDOCK_H
+
+#include <QDockWidget>
+#include <QLabel>
+#include <QComboBox>
+#include <QSettings>
+#include <messagesmodel.h>
+
+class MessagesDock : public QDockWidget  {
+    Q_OBJECT
+
+    using Super = QDockWidget;
+
+public:
+    MessagesDock(QWidget *parent, QSettings *settings);
+
+public slots:
+    void insert_line(messagetype::Type type, QString file, int line, int column, QString text, QString hint);
+    void clear_messages();
+
+signals:
+    void report_message(messagetype::Type type, QString file, int line, int column, QString text, QString hint);
+    void pass_clear_messages();
+    void message_selected(messagetype::Type type, QString file, int line, int column, QString text, QString hint);
+
+private:
+    QSettings *settings;
+};
+
+#endif // MESSAGESDOCK_H
diff --git a/qtmips_gui/messagesmodel.cpp b/qtmips_gui/messagesmodel.cpp
new file mode 100644
index 0000000..6138e01
--- /dev/null
+++ b/qtmips_gui/messagesmodel.cpp
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ *   B35APO - Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ *   B4M35PAP - Advanced Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019      Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University        (http://www.cvut.cz/)
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#include <QBrush>
+
+#include "messagesmodel.h"
+
+class MessagesEntry {
+public:
+    inline MessagesEntry(messagetype::Type type, QString file, int line,
+                  int column, QString text, QString hint) {
+
+        this->type = type;
+        this->file = file;
+        this->line = line;
+        this->column = column;
+        this->text = text;
+        this->hint = hint;
+    }
+    messagetype::Type type;
+    QString file;
+    int line;
+    int column;
+    QString text;
+    QString hint;
+};
+
+
+MessagesModel::MessagesModel(QObject *parent) : Super(parent) {
+
+}
+
+int MessagesModel::rowCount(const QModelIndex & /*parent*/) const {
+   return messages.count();
+}
+
+int MessagesModel::columnCount(const QModelIndex & /*parent*/) const {
+    return 1;
+}
+
+QVariant MessagesModel::headerData(int section, Qt::Orientation orientation, int role) const
+{
+    if(orientation == Qt::Horizontal) {
+        if(role == Qt::DisplayRole) {
+            switch (section) {
+            case 0:
+                return tr("Type");
+            case 1:
+                return tr("Source");
+            case 2:
+                return tr("Line");
+            case 3:
+                return tr("Column");
+            case 4:
+                return tr("Text");
+            default:
+                return tr("");
+            }
+        }
+    }
+    return Super::headerData(section, orientation, role);
+}
+
+QVariant MessagesModel::data(const QModelIndex &index, int role) const {
+    if (index.row() >= rowCount())
+        return QVariant();
+
+    if (role == Qt::DisplayRole || role == Qt::EditRole)
+    {
+        MessagesEntry *ent = messages.at(index.row());
+        QString ret = "";
+        if (!ent->file.isEmpty())
+            ret += ent->file + ":";
+        if (ent->line)
+            ret += QString::number(ent->line) + ":";
+        if (ent->column)
+            ret += QString::number(ent->column) + ":";
+        ret += ent->text;
+        return ret;
+    }
+    if (role == Qt::BackgroundRole) {
+        MessagesEntry *ent = messages.at(index.row());
+        switch (ent->type) {
+        case messagetype::ERROR:
+            return QBrush(QColor(255, 230, 230));
+        case messagetype::WARNING:
+            return QBrush(QColor(255, 255, 220));
+        default:
+            return QVariant();
+        }
+    }
+    return QVariant();
+}
+
+void MessagesModel::insert_line(messagetype::Type type, QString file, int line,
+                               int column, QString text, QString hint) {
+
+    beginInsertRows(QModelIndex(), rowCount(), rowCount());
+    messages.append(new MessagesEntry(type, file, line, column, text, hint));
+    endInsertRows();
+}
+
+void MessagesModel::clear_messages() {
+    beginRemoveRows(QModelIndex(), 0, rowCount() - 1);
+    while (!messages.isEmpty()) {
+        delete messages.takeFirst();
+    }
+    endRemoveRows();
+}
+
+void MessagesModel::activated(QModelIndex index) {
+    if (index.row() >= rowCount())
+        return;
+
+    MessagesEntry *ent = messages.at(index.row());
+    emit message_selected(ent->type, ent->file, ent->line, ent->column, ent->text, ent->hint);
+}
diff --git a/qtmips_gui/messagesmodel.h b/qtmips_gui/messagesmodel.h
new file mode 100644
index 0000000..d9c35e5
--- /dev/null
+++ b/qtmips_gui/messagesmodel.h
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ *   B35APO - Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ *   B4M35PAP - Advanced Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019      Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University        (http://www.cvut.cz/)
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#ifndef MESSAGESMODEL_H
+#define MESSAGESMODEL_H
+
+#include <QAbstractListModel>
+#include <QFont>
+#include <QVector>
+
+#include "messagetype.h"
+
+class MessagesEntry;
+
+class MessagesModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+    using Super = QAbstractListModel;
+public:
+    MessagesModel(QObject *parent);
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override ;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+
+public slots:
+    void insert_line(messagetype::Type type, QString file, int line, int column, QString text, QString hint);
+    void clear_messages();
+    void activated(QModelIndex index);
+
+signals:
+    void message_selected(messagetype::Type type, QString file, int line, int column, QString text, QString hint);
+
+private:
+    QVector<MessagesEntry *> messages;
+};
+
+#endif // MESSAGESMODEL_H
diff --git a/qtmips_gui/messagesview.cpp b/qtmips_gui/messagesview.cpp
new file mode 100644
index 0000000..5bb651e
--- /dev/null
+++ b/qtmips_gui/messagesview.cpp
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ *   B35APO - Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ *   B4M35PAP - Advanced Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019      Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University        (http://www.cvut.cz/)
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#include <QHeaderView>
+#include <QFontMetrics>
+#include <QScrollBar>
+#include <QKeyEvent>
+#include <QClipboard>
+#include <QApplication>
+#include "messagesview.h"
+#include "messagesmodel.h"
+
+MessagesView::MessagesView(QWidget *parent, QSettings *settings) : Super(parent) {
+    this->settings = settings;
+}
+
+void MessagesView::resizeEvent(QResizeEvent *event) {
+    MessagesModel *m = dynamic_cast<MessagesModel*>(model());
+
+    Super::resizeEvent(event);
+}
+
+void MessagesView::keyPressEvent(QKeyEvent *event) {
+    if(event->matches(QKeySequence::Copy)) {
+            QString text;
+            QItemSelectionRange range = selectionModel()->selection().first();
+            for (auto i = range.top(); i <= range.bottom(); ++i)
+            {
+                QStringList rowContents;
+                for (auto j = range.left(); j <= range.right(); ++j)
+                    rowContents << model()->index(i,j).data().toString();
+                text += rowContents.join("\t");
+                text += "\n";
+            }
+            QApplication::clipboard()->setText(text);
+    } else
+        Super::keyPressEvent(event);
+}
diff --git a/qtmips_gui/messagesview.h b/qtmips_gui/messagesview.h
new file mode 100644
index 0000000..ee8e7ed
--- /dev/null
+++ b/qtmips_gui/messagesview.h
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ *   B35APO - Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ *   B4M35PAP - Advanced Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019      Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University        (http://www.cvut.cz/)
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#ifndef MESSAGESVIEW_H
+#define MESSAGESVIEW_H
+
+#include <QObject>
+#include <QSettings>
+#include <QListView>
+#include <QSharedPointer>
+
+class MessagesView : public QListView
+{
+    Q_OBJECT
+
+    using Super = QListView;
+
+public:
+    MessagesView(QWidget *parent, QSettings *settings);
+
+    void resizeEvent(QResizeEvent *event) override;
+protected:
+    void keyPressEvent(QKeyEvent *event) override;
+    QSettings *settings;
+};
+
+#endif // MESSAGESVIEW_H
diff --git a/qtmips_gui/qtmips_gui.pro b/qtmips_gui/qtmips_gui.pro
index 8e27fe2..0f8cab0 100644
--- a/qtmips_gui/qtmips_gui.pro
+++ b/qtmips_gui/qtmips_gui.pro
@@ -76,7 +76,10 @@ SOURCES += \
     hinttabledelegate.cpp \
     coreview/minimux.cpp \
     srceditor.cpp \
-    highlighter.cpp
+    highlighter.cpp \
+    messagesdock.cpp \
+    messagesmodel.cpp \
+    messagesview.cpp
 
 HEADERS += \
         mainwindow.h \
@@ -121,7 +124,10 @@ HEADERS += \
     hinttabledelegate.h \
     coreview/minimux.h \
     srceditor.h \
-    highlighter.h
+    highlighter.h \
+    messagesdock.h \
+    messagesmodel.h \
+    messagesview.h
 
 wasm: SOURCES += \
     qhtml5file_html5.cpp