private void NewQuestion(object sender, EventArgs e)
{
SectionNode nodeToBeAddedTo = trv_view_exam.SelectedNode.GetType() == typeof(SectionNode) ? (SectionNode)trv_view_exam.SelectedNode : (SectionNode)trv_view_exam.SelectedNode.Parent;
Question question = new Question()
{
No = nodeToBeAddedTo.Nodes.Count + 1
};
//
QuestionNode questionNode = new QuestionNode(question)
{
ContextMenuStrip = cms_question
};
nodeToBeAddedTo.Nodes.Add(questionNode);
//
trv_view_exam.ExpandAll();
//
ChangeRepresentationObject obj = new ChangeRepresentationObject()
{
Action = ActionType.Add,
Question = question,
SectionTitle = nodeToBeAddedTo.Title
};
undoRedo.InsertObjectforUndoRedo(obj);
//
IsDirty = true;
}
private void DeleteQuestion(object sender, EventArgs e)
{
var sectionNode = trv_view_exam.SelectedNode.Parent;
//
ChangeRepresentationObject obj = new ChangeRepresentationObject()
{
Action = ActionType.Delete,
Question = ((QuestionNode)trv_view_exam.SelectedNode).Question,
SectionTitle = ((SectionNode)sectionNode).Title
};
undoRedo.InsertObjectforUndoRedo(obj);
//
sectionNode.Nodes.Remove(trv_view_exam.SelectedNode);
//
int i = 1;
foreach (QuestionNode questionNode in sectionNode.Nodes)
{
questionNode.Question.No = 1;
questionNode.Text = "Question " + i;
i++;
}
//
IsDirty = true;
}
private void QuestionChanged(object sender, EventArgs e)
{
IsDirty = true;
//
ChangeRepresentationObject obj = new ChangeRepresentationObject();
obj.Action = ActionType.Modify;
//
Question question = new Question();
var answerCtrl = pan_options.Controls.OfType <OptionControl>().FirstOrDefault(s => s.Checked);
question.Answer = answerCtrl == null ? '\0' : answerCtrl.Letter;
question.Explanation = txt_explanation.Text;
question.Image = (Bitmap)pct_image.Image;
question.No = trv_view_exam.SelectedNode.Index + 1;
question.Options.Clear();
foreach (var ctrl in pan_options.Controls.OfType <OptionControl>())
{
Option option = new Option();
option.Alphabet = ctrl.Letter;
option.Text = ctrl.Text;
question.Options.Add(option);
}
question.Text = txt_question_text.Text;
//
obj.Question = question;
obj.SectionTitle = ((SectionNode)trv_view_exam.SelectedNode.Parent).Title;
undoRedo.InsertObjectforUndoRedo(obj);
}
public ChangeRepresentationObject Undo()
{
if (UndoCollection.Count == 0)
{
return(null);
}
ChangeRepresentationObject undoObject = UndoCollection.Pop();
RedoCollection.Push(undoObject);
return(undoObject);
}
public ChangeRepresentationObject Redo()
{
if (RedoCollection.Count == 0)
{
return(null);
}
ChangeRepresentationObject redoObject = RedoCollection.Pop();
UndoCollection.Push(redoObject);
return(redoObject);
}
private void Redo(object sender, EventArgs e)
{
ChangeRepresentationObject redoObject = undoRedo.Redo();
if (redoObject == null)
{
return;
}
else
{
switch (redoObject.Action)
{
case ActionType.Add:
SectionNode sectionNode = trv_view_exam.Nodes[0].Nodes.Cast <SectionNode>().FirstOrDefault(s => s.Title == redoObject.SectionTitle);
if (sectionNode == null)
{
sectionNode = new SectionNode(redoObject.SectionTitle)
{
ContextMenuStrip = cms_section
};
//
QuestionNode questionNode = new QuestionNode(redoObject.Question)
{
ContextMenuStrip = cms_question
};
sectionNode.Nodes.Add(questionNode);
//
trv_view_exam.Nodes[0].Nodes.Add(sectionNode);
trv_view_exam.ExpandAll();
}
else
{
sectionNode.ContextMenuStrip = cms_section;
//
QuestionNode questionNode = new QuestionNode(redoObject.Question)
{
ContextMenuStrip = cms_question
};
sectionNode.Nodes.Add(questionNode);
//
trv_view_exam.ExpandAll();
}
//
int i = 1;
foreach (QuestionNode questionNode_ in sectionNode.Nodes)
{
questionNode_.Text = "Question " + i;
questionNode_.Question.No = i;
i++;
}
break;
case ActionType.Delete:
SectionNode _sectionNode = trv_view_exam.Nodes[0].Nodes.Cast <SectionNode>().FirstOrDefault(s => s.Title == redoObject.SectionTitle);
if (_sectionNode != null)
{
if (_sectionNode.Nodes.Count >= redoObject.Question.No)
{
exam.Sections.First(s => s.Title == redoObject.SectionTitle).Questions.RemoveAt(redoObject.Question.No - 1);
_sectionNode.Nodes.RemoveAt(redoObject.Question.No - 1);
}
}
//
int j = 1;
foreach (QuestionNode questionNode_ in _sectionNode.Nodes)
{
questionNode_.Text = "Question " + j;
questionNode_.Question.No = j;
j++;
}
break;
case ActionType.Modify:
SectionNode sectionNode_ = trv_view_exam.Nodes[0].Nodes.Cast <SectionNode>().FirstOrDefault(s => s.Title == redoObject.SectionTitle);
if (sectionNode_ != null)
{
QuestionNode questionNode = (QuestionNode)sectionNode_.Nodes[redoObject.Question.No - 1];
questionNode.Question = redoObject.Question;
//
txt_explanation.Text = redoObject.Question.Explanation;
txt_question_text.Text = redoObject.Question.Text;
lbl_section_question.Text = "Section: " + trv_view_exam.SelectedNode.Parent.Text + " Question " + redoObject.Question.No;
pct_image.Image = redoObject.Question.Image;
//
pan_options.Controls.Clear();
//
int k = 0;
if (redoObject.Question.IsMultipleChoice)
{
foreach (var option in redoObject.Question.Options)
{
OptionsControl ctrl = new OptionsControl()
{
Letter = option.Alphabet,
Text = option.Text,
Location = new Point(2, k * 36)
};
if (redoObject.Question.Answers.Contains(option.Alphabet))
{
ctrl.Checked = true;
}
pan_options.Controls.Add(ctrl);
k++;
}
}
else
{
foreach (var option in redoObject.Question.Options)
{
OptionControl ctrl = new OptionControl()
{
Letter = option.Alphabet,
Text = option.Text,
Location = new Point(2, k * 36)
};
if (option.Alphabet == redoObject.Question.Answer)
{
ctrl.Checked = true;
}
pan_options.Controls.Add(ctrl);
k++;
}
}
}
break;
}
}
}
private void QuestionChanged(object sender, EventArgs e)
{
IsDirty = true;
//
ChangeRepresentationObject obj = new ChangeRepresentationObject()
{
Action = ActionType.Modify
};
//
Question question = new Question()
{
IsMultipleChoice = chkMulipleChoice.Checked
};
if (question.IsMultipleChoice)
{
var answerCtrls = pan_options.Controls.OfType <OptionsControl>().Where(s => s.Checked);
question.Answers = answerCtrls.Select(x => x.Letter).ToArray();
}
else
{
var answerCtrl = pan_options.Controls.OfType <OptionControl>().FirstOrDefault(s => s.Checked);
question.Answer = answerCtrl == null ? '\0' : answerCtrl.Letter;
}
question.Explanation = txt_explanation.Text;
question.Image = (Bitmap)pct_image.Image;
question.No = trv_view_exam.SelectedNode.Index + 1;
question.Options.Clear();
if (question.IsMultipleChoice)
{
var ctrls = pan_options.Controls.OfType <OptionsControl>();
foreach (var ctrl in ctrls)
{
Option option = new Option()
{
Alphabet = ctrl.Letter,
Text = ctrl.Text
};
question.Options.Add(option);
}
}
else
{
var ctrls = pan_options.Controls.OfType <OptionControl>();
foreach (var ctrl in ctrls)
{
Option option = new Option()
{
Alphabet = ctrl.Letter,
Text = ctrl.Text
};
question.Options.Add(option);
}
}
question.Text = txt_question_text.Text;
//
obj.Question = question;
obj.SectionTitle = ((SectionNode)trv_view_exam.SelectedNode.Parent).Title;
undoRedo.InsertObjectforUndoRedo(obj);
}
//
public void InsertObjectforUndoRedo(ChangeRepresentationObject dataobject)
{
UndoCollection.Push(dataobject);
RedoCollection.Clear();
}
