Add checkbox to toggle grid lines

editor.cpp

 #include "editor.h"
+#include <QCheckBox>
 #include <QPainter>
 #include <QMouseEvent>
 
     for (int i = 0; i <= map->getWidth(); i++) {
         int x = i * 16;
         QGraphicsLineItem *line = scene->addLine(x, 0, x, pixelHeight);
+        line->setVisible(gridToggleCheckbox->isChecked());
+        connect(gridToggleCheckbox, &QCheckBox::toggled, [=](bool checked){line->setVisible(checked);});
     }
     for (int j = 0; j <= map->getHeight(); j++) {
         int y = j * 16;
         QGraphicsLineItem *line = scene->addLine(0, y, pixelWidth, y);
+        line->setVisible(gridToggleCheckbox->isChecked());
+        connect(gridToggleCheckbox, &QCheckBox::toggled, [=](bool checked){line->setVisible(checked);});
     }
 }
 

editor.h

 #include <QGraphicsSceneMouseEvent>
 #include <QGraphicsItemAnimation>
 #include <QComboBox>
+#include <QCheckBox>
 
 #include "project.h"
 
     QObject *parent = NULL;
     Project *project = NULL;
     Map *map = NULL;
+    QCheckBox *gridToggleCheckbox = NULL;
     void saveProject();
     void save();
     void undo();

mainwindow.cpp

     new QShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_Z), this, SLOT(redo()));
 
     editor = new Editor;
+    editor->gridToggleCheckbox = ui->checkBox_ToggleGrid;
     connect(editor, SIGNAL(objectsChanged()), this, SLOT(updateSelectedObjects()));
     connect(editor, SIGNAL(selectedObjectsChanged()), this, SLOT(updateSelectedObjects()));
 

mainwindow.h

     void onOpenMapListContextMenu(const QPoint &point);
     void onAddNewMapToGroupClick(QAction* triggeredAction);
 
+    void on_checkBox_ToggleGrid_toggled(bool checked);
+
 private:
     Ui::MainWindow *ui;
     QStandardItemModel *mapListModel;

mainwindow.ui

              <item row="0" column="0">
               <widget class="QFrame" name="frame_6">
                <property name="sizePolicy">
-                <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+                <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
                  <horstretch>0</horstretch>
                  <verstretch>0</verstretch>
                 </sizepolicy>
                <property name="frameShadow">
                 <enum>QFrame::Raised</enum>
                </property>
-               <widget class="QToolButton" name="toolButton_Paint">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="geometry">
-                 <rect>
-                  <x>0</x>
-                  <y>0</y>
-                  <width>31</width>
-                  <height>31</height>
-                 </rect>
-                </property>
-                <property name="text">
-                 <string>Paint</string>
-                </property>
-                <property name="icon">
-                 <iconset resource="resources/images.qrc">
-                  <normaloff>:/icons/pencil.ico</normaloff>:/icons/pencil.ico</iconset>
-                </property>
-                <property name="checkable">
-                 <bool>true</bool>
-                </property>
-                <property name="checked">
-                 <bool>true</bool>
-                </property>
-                <property name="autoRaise">
-                 <bool>false</bool>
-                </property>
-               </widget>
-               <widget class="QToolButton" name="toolButton_Select">
-                <property name="enabled">
-                 <bool>true</bool>
-                </property>
-                <property name="geometry">
-                 <rect>
-                  <x>30</x>
-                  <y>0</y>
-                  <width>31</width>
-                  <height>31</height>
-                 </rect>
-                </property>
-                <property name="text">
-                 <string>Select</string>
-                </property>
-                <property name="icon">
-                 <iconset resource="resources/images.qrc">
-                  <normaloff>:/icons/cursor.ico</normaloff>:/icons/cursor.ico</iconset>
-                </property>
-                <property name="checkable">
-                 <bool>true</bool>
-                </property>
-               </widget>
-               <widget class="QToolButton" name="toolButton_Fill">
-                <property name="geometry">
-                 <rect>
-                  <x>60</x>
-                  <y>0</y>
-                  <width>31</width>
-                  <height>31</height>
-                 </rect>
-                </property>
-                <property name="text">
-                 <string>Fill</string>
-                </property>
-                <property name="icon">
-                 <iconset resource="resources/images.qrc">
-                  <normaloff>:/icons/fill_color.ico</normaloff>:/icons/fill_color.ico</iconset>
-                </property>
-                <property name="checkable">
-                 <bool>true</bool>
+               <layout class="QHBoxLayout" name="horizontalLayout_2">
+                <property name="spacing">
+                 <number>4</number>
                 </property>
-               </widget>
-               <widget class="QToolButton" name="toolButton_Dropper">
-                <property name="geometry">
-                 <rect>
-                  <x>90</x>
-                  <y>0</y>
-                  <width>31</width>
-                  <height>31</height>
-                 </rect>
+                <property name="leftMargin">
+                 <number>4</number>
                 </property>
-                <property name="text">
-                 <string>Dropper</string>
+                <property name="topMargin">
+                 <number>4</number>
                 </property>
-                <property name="icon">
-                 <iconset resource="resources/images.qrc">
-                  <normaloff>:/icons/pipette.ico</normaloff>:/icons/pipette.ico</iconset>
+                <property name="rightMargin">
+                 <number>4</number>
                 </property>
-                <property name="checkable">
-                 <bool>true</bool>
+                <property name="bottomMargin">
+                 <number>4</number>
                 </property>
-               </widget>
+                <item>
+                 <widget class="QToolButton" name="toolButton_Paint">
+                  <property name="enabled">
+                   <bool>true</bool>
+                  </property>
+                  <property name="text">
+                   <string>Paint</string>
+                  </property>
+                  <property name="icon">
+                   <iconset resource="resources/images.qrc">
+                    <normaloff>:/icons/pencil.ico</normaloff>:/icons/pencil.ico</iconset>
+                  </property>
+                  <property name="checkable">
+                   <bool>true</bool>
+                  </property>
+                  <property name="checked">
+                   <bool>true</bool>
+                  </property>
+                  <property name="autoRaise">
+                   <bool>false</bool>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <widget class="QToolButton" name="toolButton_Select">
+                  <property name="enabled">
+                   <bool>true</bool>
+                  </property>
+                  <property name="text">
+                   <string>Select</string>
+                  </property>
+                  <property name="icon">
+                   <iconset resource="resources/images.qrc">
+                    <normaloff>:/icons/cursor.ico</normaloff>:/icons/cursor.ico</iconset>
+                  </property>
+                  <property name="checkable">
+                   <bool>true</bool>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <widget class="QToolButton" name="toolButton_Fill">
+                  <property name="text">
+                   <string>Fill</string>
+                  </property>
+                  <property name="icon">
+                   <iconset resource="resources/images.qrc">
+                    <normaloff>:/icons/fill_color.ico</normaloff>:/icons/fill_color.ico</iconset>
+                  </property>
+                  <property name="checkable">
+                   <bool>true</bool>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <widget class="QToolButton" name="toolButton_Dropper">
+                  <property name="text">
+                   <string>Dropper</string>
+                  </property>
+                  <property name="icon">
+                   <iconset resource="resources/images.qrc">
+                    <normaloff>:/icons/pipette.ico</normaloff>:/icons/pipette.ico</iconset>
+                  </property>
+                  <property name="checkable">
+                   <bool>true</bool>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <widget class="QCheckBox" name="checkBox_ToggleGrid">
+                  <property name="styleSheet">
+                   <string notr="true">margin-left: 10px</string>
+                  </property>
+                  <property name="text">
+                   <string>Show Grid</string>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <spacer name="horizontalSpacer">
+                  <property name="orientation">
+                   <enum>Qt::Horizontal</enum>
+                  </property>
+                  <property name="sizeHint" stdset="0">
+                   <size>
+                    <width>40</width>
+                    <height>20</height>
+                   </size>
+                  </property>
+                 </spacer>
+                </item>
+               </layout>
               </widget>
              </item>
              <item row="1" column="0">
                     <rect>
                      <x>0</x>
                      <y>0</y>
-                     <width>617</width>
-                     <height>602</height>
+                     <width>614</width>
+                     <height>621</height>
                     </rect>
                    </property>
                    <layout class="QGridLayout" name="gridLayout_8">
                      <rect>
                       <x>0</x>
                       <y>0</y>
-                      <width>186</width>
-                      <height>609</height>
+                      <width>180</width>
+                      <height>629</height>
                      </rect>
                     </property>
                     <property name="sizePolicy">
               <rect>
                <x>0</x>
                <y>0</y>
-               <width>385</width>
-               <height>638</height>
+               <width>381</width>
+               <height>657</height>
               </rect>
              </property>
              <layout class="QGridLayout" name="gridLayout_7">
                        <rect>
                         <x>0</x>
                         <y>0</y>
-                        <width>416</width>
-                        <height>557</height>
+                        <width>420</width>
+                        <height>584</height>
                        </rect>
                       </property>
                       <property name="sizePolicy">
      <x>0</x>
      <y>0</y>
      <width>1117</width>
-     <height>20</height>
+     <height>21</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">