Attempt to Fix #35

* Any changes to an OD entry will change the save button to red and not allow you to switch
  the OD view until you have saved or allowed the changes to be lost
* After saving an OD change, adding a PDO, deleting PDO, editing PDO, or saving Device Info
  window title for device will go red and you will be prompted to confirm a close or app
  quit operation
* Pressing save to the XML file will reset the dirty flag and make clear the red banner
  saving the EDS file will not clear the red banner

EDSTest/DeviceInfoView.cs

@@ -160,6 +160,8 @@ private void button_update_devfile_info_Click(object sender, EventArgs e)
                 //These are read only and auto calculated
                 //textBox_rxpdos.Text = eds.di.NrOfRXPDO.ToString();
                 //textBox_txpdos.Text = eds.di.NrOfTXPDO.ToString();
+
+                eds.dirty = true;
             }
             catch (Exception ex)
             {

EDSTest/DeviceODView.cs

@@ -38,45 +38,36 @@ public partial class DeviceODView : MyTabUserControl
         public EDSsharp eds = null;
 
         ODentry selectedobject;
+        ODentry lastselectedobject;
         ListViewItem selecteditem;
         ListViewItem selecteditemsub;
 
         public DeviceODView()
         {
             InitializeComponent();
 
-            comboBox_datatype.Items.Add("");
-
             foreach (DataType foo in Enum.GetValues(typeof(DataType)))
             {
                 comboBox_datatype.Items.Add(foo.ToString());
             }
 
-            comboBox_objecttype.Items.Add("");
-
             foreach (ObjectType foo in Enum.GetValues(typeof(ObjectType)))
             {
                 comboBox_objecttype.Items.Add(foo.ToString());
             }
 
-            comboBox_accesstype.Items.Add("");
-
             foreach (EDSsharp.AccessType foo in Enum.GetValues(typeof(EDSsharp.AccessType)))
             {
                 comboBox_accesstype.Items.Add(foo.ToString());
             }
 
             comboBox_accesstype.Items.Add("0x1003 rw/ro");
 
-
-            comboBox_memory.Items.Add("");
-
             foreach (StorageLocation foo in Enum.GetValues(typeof(StorageLocation)))
             {
                 comboBox_memory.Items.Add(foo.ToString());
             }
 
-            comboBox_pdomap.Items.Add("");
             comboBox_pdomap.Items.Add("no");
             comboBox_pdomap.Items.Add("optional");
 
@@ -85,14 +76,40 @@ public DeviceODView()
             listView_optional_objects.DoubleBuffering(true);
             listViewDetails.DoubleBuffering(true);
 
+            foreach(Control c in splitContainer4.Panel2.Controls)
+            {
+                if (c is CheckBox)
+                {
+                    ((CheckBox)c).CheckedChanged += DataDirty;
+                }
+                else
+                {
+                    c.TextChanged += DataDirty;
+                }
+            }
+        }
+
+        bool updating = false;
+
+        private void DataDirty(object sender, EventArgs e)
+        {
+            if (updating == true)
+                return;
+
+            button_save_changes.BackColor = Color.Red;
+
+
         }
 
-
         private void button_save_changes_Click(object sender, EventArgs e)
         {
             if (selectedobject == null)
                 return;
 
+            eds.dirty = true;
+
+            button_save_changes.BackColor = default(Color);
+
             //Allow everything to be updated and control what is allowed via enable/disable for the control
 
             selectedobject.parameter_name = textBox_name.Text;
@@ -132,6 +149,7 @@ private void button_save_changes_Click(object sender, EventArgs e)
                 selectedobject.Disabled = !checkBox_enabled.Checked;
 
                 selectedobject.location = (StorageLocation)Enum.Parse(typeof(StorageLocation), comboBox_memory.SelectedItem.ToString());
+
             }
 
             if(selectedobject.parent == null && selectedobject.objecttype == ObjectType.ARRAY)
@@ -183,9 +201,15 @@ public void updatedetailslist()
         public void validateanddisplaydata()
         {
 
+
             if (selectedobject == null)
                 return;
 
+            lastselectedobject = selectedobject;
+
+            updating = true;
+
+
             ODentry od = (ODentry)selectedobject;
 
 
@@ -265,6 +289,7 @@ public void validateanddisplaydata()
                     textBox_defaultvalue.Enabled = false;
                 }
 
+                updating = false;
                 return; //nothing else to do at this point
             }
 
@@ -301,6 +326,8 @@ public void validateanddisplaydata()
 
             }
 
+            updating = false;
+
             return;
         }
 
@@ -412,6 +439,8 @@ private void listView_mandatory_objects_MouseClick(object sender, MouseEventArgs
 
             ListViewItem lvi = listView_mandatory_objects.SelectedItems[0];
 
+            if (checkdirty())
+                return;
 
             UInt16 idx = Convert.ToUInt16(lvi.Text, 16);
             updateselectedindexdisplay(idx);
@@ -429,6 +458,9 @@ private void list_mouseclick(ListView listview, MouseEventArgs e)
             if (listview.SelectedItems.Count == 0)
                 return;
 
+            if (checkdirty())
+                return;
+
             ListViewItem lvi = listview.SelectedItems[0];
             UInt16 idx = Convert.ToUInt16(lvi.Text, 16);
 
@@ -469,6 +501,8 @@ private void list_mouseclick(ListView listview, MouseEventArgs e)
 
         private void listView_MouseDown(ListView listview, MouseEventArgs e)
         {
+
+
             ListViewHitTestInfo HI = listview.HitTest(e.Location);
             if (e.Button == MouseButtons.Right)
             {
@@ -516,6 +550,9 @@ private void listViewDetails_MouseClick(object sender, MouseEventArgs e)
             if (listViewDetails.SelectedItems.Count == 0)
                 return;
 
+            if (checkdirty())
+                return;
+
             selecteditemsub = lvi;
 
             ODentry od = (ODentry)lvi.Tag;
@@ -645,6 +682,8 @@ private void addNewObjectToolStripMenuItem_Click(object sender, EventArgs e)
             if (ni.ShowDialog() == DialogResult.OK)
             {
 
+                eds.dirty = true;
+
                 ODentry od = new ODentry();
 
                 od.objecttype = ni.ot;
@@ -744,13 +783,15 @@ private void deleteObjectToolStripMenuItem_Click(object sender, EventArgs e)
                         }
                     }
 
+
 
                 }
             }
 
 
-                    if (MessageBox.Show(string.Format("Really delete index 0x{0:x4} ?", od.index), "Are you sure?", MessageBoxButtons.YesNo) == DialogResult.Yes)
+            if (MessageBox.Show(string.Format("Really delete index 0x{0:x4} ?", od.index), "Are you sure?", MessageBoxButtons.YesNo) == DialogResult.Yes)
             {
+                eds.dirty = true;
                 eds.ods.Remove(od.index);
                 populateindexlists();
             }
@@ -765,6 +806,7 @@ private void disableObjectToolStripMenuItem_Click(object sender, EventArgs e)
 
             ODentry od = (ODentry)item.Tag;
 
+            eds.dirty = true;
             od.Disabled = !od.Disabled;
             populateindexlists();
 
@@ -819,6 +861,7 @@ private void addSubItemToolStripMenuItem_Click(object sender, EventArgs e)
                     }
                 }
 
+                eds.dirty = true;
                 updateselectedindexdisplay(selectedobject.index);
                 validateanddisplaydata();
 
@@ -855,6 +898,7 @@ private void removeSubItemToolStripMenuItem_Click(object sender, EventArgs e)
 
                 od.parent.subobjects = newlist;
 
+                eds.dirty = true;
                 updateselectedindexdisplay(selectedobject.index);
                 validateanddisplaydata();
             }
@@ -930,12 +974,38 @@ private void listViewDetails_SelectedIndexChanged(object sender, EventArgs e)
             if (listViewDetails.SelectedItems.Count == 0)
                 return;
 
+            if (checkdirty())
+                return;
+
+
             ListViewItem lvi = listViewDetails.SelectedItems[0];
 
             selecteditemsub = lvi;
             selectedobject = (ODentry)lvi.Tag;
             validateanddisplaydata();
         }
+
+        private bool checkdirty()
+        {
+
+            if (button_save_changes.BackColor == Color.Red)
+            {
+                if (button_save_changes.BackColor == Color.Red)
+                {
+                    if (MessageBox.Show(String.Format("Unsaved changes on Index 0x{0:x4}/{1:x2}\nDo you wish to change objects and loose your changes", lastselectedobject.index, lastselectedobject.subindex), "Unsaved changes",MessageBoxButtons.YesNo) == DialogResult.No)
+                    {
+                        return true;
+                    }
+                    else
+                    {
+                        button_save_changes.BackColor = default(Color);
+                    }
+
+                }
+            }
+
+            return false;
+        }
     }
 
     public static class ControlExtensions

EDSTest/DevicePDOView.cs

@@ -308,10 +308,10 @@ void updatePDOTXslot(ODentry od , int row)
 
         void listView_TXCOBmap_onComboBoxIndexChanged(int row, int col, string Text)
         {
-
-            //row+0x1a00 will be the slot to adjust
 
+            //row+0x1a00 will be the slot to adjust
 
+            eds.dirty = true;
 
             UInt16 slot = (UInt16)(0x200 + Convert.ToUInt16(listView_TXCOBmap.Items[row].SubItems[1].Text, 16));
             ODentry slotod = eds.ods[slot];
@@ -486,6 +486,7 @@ private void button_addPDO_Click(object sender, EventArgs e)
 
             }
 
+            eds.dirty = true;
 
 
         }
@@ -506,7 +507,9 @@ private void button_deletePDO_Click(object sender, EventArgs e)
                     doUpdatePDOs();
                     doUpdateOD();
                 }
-
+
+                eds.dirty = true;
+
             }
             catch (Exception ex)
             {
@@ -585,6 +588,8 @@ private void button_savepdochanges_Click(object sender, EventArgs e)
 
                 doUpdatePDOs();
                 doUpdateOD();
+
+                eds.dirty = true;
             }
             catch (Exception ex)
             {