protected override void OnBeforeCellCheck(Cell cell, AdvTreeCellBeforeCheckEventArgs e)
{
if (this.IsReadOnly && e.Action != eTreeAction.Code)
e.Cancel = true;
else
{
if (e.Action != eTreeAction.Code)
{
bool newValue = (e.NewCheckState == System.Windows.Forms.CheckState.Checked);
e.Cancel = !ApplyValue(newValue, null);
}
}
base.OnBeforeCellCheck(cell, e);
}
/// <summary>
/// Sets the Checked or CheckState properties.
/// </summary>
/// <param name="value">New value for checked state.</param>
/// <param name="actionSource">Action source.</param>
public void SetChecked(CheckState value, eTreeAction actionSource)
{
AdvTreeCellBeforeCheckEventArgs beforeCheckArgs = new AdvTreeCellBeforeCheckEventArgs(actionSource, this, value);
InvokeBeforeCheck(beforeCheckArgs);
if (beforeCheckArgs.Cancel) return;
_CheckState = value;
m_Checked = value == CheckState.Checked;
OnAppearanceChanged();
if (this.CheckBoxStyle == eCheckBoxStyle.RadioButton && value == CheckState.Checked && this.Parent != null)
{
Node parent = this.Parent;
AdvTree tree = parent.TreeControl;
if (tree != null) tree.BeginUpdate();
bool processNodes = true;
foreach (Cell item in parent.Cells)
{
if (item == this) continue;
if (item.CheckBoxStyle == eCheckBoxStyle.RadioButton)
{
item.Checked = false;
processNodes = false;
}
}
if (processNodes)
{
if (parent.Parent != null)
{
foreach (Node item in parent.Parent.Nodes)
{
if (item != parent && item.CheckBoxStyle == eCheckBoxStyle.RadioButton)
item.Checked = false;
}
}
else
{
if (tree != null && NodeOperations.IsRootNode(tree, parent))
{
foreach (Node item in tree.Nodes)
{
if (item != parent && item.CheckBoxStyle == eCheckBoxStyle.RadioButton)
item.Checked = false;
}
}
}
}
if (tree != null) tree.EndUpdate();
}
InvokeAfterCheck(actionSource);
}
/// <summary>
/// Invokes <see cref="AdvTree.BeforeCheck">BeforeCheck</see> event on AdvTree
/// control.
/// </summary>
protected virtual void InvokeBeforeCheck(AdvTreeCellBeforeCheckEventArgs e)
{
AdvTree tree = this.TreeControl;
if (tree != null)
{
tree.InvokeBeforeCheck(e);
}
if (this.Parent != null)
this.Parent.BeforeCellCheck(this, e);
}
void layersList_BeforeCheck(object sender, AdvTreeCellBeforeCheckEventArgs e)
{
if (Control.MouseButtons != MouseButtons.Left)
e.Cancel = true;
}