protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
HideTxtBox();
if (e.Button == MouseButtons.Left)
{
if (e.Y > headerBuffer) //���������������ѡ�������¼�
{
//����ѡ��״̬
if (selectedSubject != null)
{
//�Ƿ�����չ��ť
int plus = PlusInArea(e, selectedSubject);
if (plus > 0)
{
SubjectBase subject = null;
subject = new TitleSubject(selectedSubject, plus);
if (subject != null)
{
subjectNodes.Add(subject);
selectedSubject = subject;
}
Invalidate();
return;
}
if (e.Clicks == 2)
{
//�Ƿ�������
if (TitleInArea(e, selectedSubject))
{
txtNode.Tag = selectedSubject;
ShowTxtBox();
return;
}
}
}
//�Ƿ����۵���ť
SubjectBase collaspSubject = CollaspeInArea(e);
if (collapseSubject != null)
{
collapseSubject.CollapseChildSubject(!collapseSubject.Expanded);
Invalidate();
return;
}
//�Ƿ�ѡ������
selectedSubject = null;
SubjectBase subjectNode = SubjectInArea(e);
if (subjectNode != null)
{
selectedSubject = subjectNode;
if (SubjectClick != null)
SubjectClick(this, subjectNode);
if (linkSubject != null)
{
subjectNode.LinkSubject = linkSubject;
linkSubject = null;
}
if (openLinkSubject)
{
linkSubject = subjectNode;
openLinkSubject = false;
}
//��ק��ʼ
dragSubject = subjectNode.DeepClone();
dragSubject.TranslateLightColor();
dragStartPx = e.X;
dragStartPy = e.Y;
}
}
Invalidate();
}
}
