Simple warnings

line.cpp

@@ -27,6 +27,11 @@ const QPoint &Line::getEnd() const
     return end;
 }
 
+const QString &Line::getColor() const
+{
+    return color;
+}
+
 QString Line::getColor()
 {
     return color;

line.h

@@ -16,6 +16,7 @@ public:
     void setColor(QString color);
     const QPoint& getStart() const;
     const QPoint& getEnd() const;
+    const QString& getColor() const;
     QString getColor();
     QString toLuaTable();
 };

mainwindow.cpp

@@ -34,8 +34,40 @@ void MainWindow::onGridUpdated()
 
     ui->listLines->clear();
 
+    QMap<QString, QList<int>> colorCount;
     for (int i = 0; i< ui->gridPreview->getLines().size(); i++)
+    {
         ui->listLines->addItem(QString("Line #%1").arg(i + 1));
+        QString color = ui->gridPreview->getLine(i).getColor();
+        auto iter = colorCount.find(color);
+        if (iter == colorCount.end())
+            colorCount.insert(color, { i + 1 });
+        else
+            iter->push_back(i + 1);
+    }
+
+    ui->treeWarnings->clear();
+
+    for (auto iter = colorCount.begin(); iter != colorCount.end(); iter++)
+    {
+        if (iter->size() > 1)
+        {
+            QTreeWidgetItem *topItem = new QTreeWidgetItem(ui->treeWarnings, QStringList{
+                QString("Color \"%1\" is used by several lines:").arg(iter.key())
+            });
+
+            for(int i = 0; i < iter->size(); i++)
+            {
+                QTreeWidgetItem *innerItem = new QTreeWidgetItem(topItem, QStringList {
+                    QString("Line #%1").arg(iter->at(i))
+                });
+                topItem->addChild(innerItem);
+            }
+
+            ui->treeWarnings->addTopLevelItem(topItem);
+        }
+    }
+    ui->treeWarnings->expandAll();
 
     PointProbe pp = ui->gridPreview->getCapturedProbe();
 

mainwindow.ui

@@ -28,7 +28,11 @@
   <widget class="QWidget" name="centralwidget">
    <layout class="QVBoxLayout" name="verticalLayout_6">
     <item>
-     <widget class="GridPreview" name="gridPreview" native="true"/>
+     <widget class="GridPreview" name="gridPreview" native="true">
+      <property name="contextMenuPolicy">
+       <enum>Qt::ContextMenuPolicy::NoContextMenu</enum>
+      </property>
+     </widget>
     </item>
    </layout>
   </widget>
@@ -426,6 +430,57 @@
     </layout>
    </widget>
   </widget>
+  <widget class="QDockWidget" name="dockWarnings">
+   <property name="features">
+    <set>QDockWidget::DockWidgetFeature::DockWidgetMovable</set>
+   </property>
+   <property name="windowTitle">
+    <string>Warnings</string>
+   </property>
+   <attribute name="dockWidgetArea">
+    <number>8</number>
+   </attribute>
+   <widget class="QWidget" name="dockWidgetContents_3">
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="QFrame" name="frame_3">
+       <property name="frameShape">
+        <enum>QFrame::Shape::StyledPanel</enum>
+       </property>
+       <property name="frameShadow">
+        <enum>QFrame::Shadow::Raised</enum>
+       </property>
+       <property name="lineWidth">
+        <number>2</number>
+       </property>
+       <layout class="QVBoxLayout" name="verticalLayout_2">
+        <item>
+         <widget class="QTreeWidget" name="treeWarnings">
+          <property name="autoExpandDelay">
+           <number>-1</number>
+          </property>
+          <property name="itemsExpandable">
+           <bool>true</bool>
+          </property>
+          <property name="wordWrap">
+           <bool>true</bool>
+          </property>
+          <attribute name="headerVisible">
+           <bool>false</bool>
+          </attribute>
+          <column>
+           <property name="text">
+            <string notr="true">1</string>
+           </property>
+          </column>
+         </widget>
+        </item>
+       </layout>
+      </widget>
+     </item>
+    </layout>
+   </widget>
+  </widget>
  </widget>
  <customwidgets>
   <customwidget>