public static void TreeItemExpand(TreeItem treeitem)
{
try
{
treeitem.EnsureVisible();
treeitem.Expand();
}
catch (Exception ex)
{
throw new Exception("TreeItem Expand failed : " + ex.Message);
}
}
/// <summary>
/// Expand a specified menu-entry within the tree.
/// </summary>
/// <param name="treeitem">TreeItem to expand</param>
/// <returns>
/// <br>True: If call worked fine</br>
/// <br>False: If an error occurred</br>
/// </returns>
public bool ExpandMenu(TreeItem treeitem)
{
try
{
if (!treeitem.Expanded)
{
treeitem.Expand();
}
return(true);
}
catch (Exception exception)
{
Log.Error(LogInfo.Namespace(MethodBase.GetCurrentMethod()), exception.Message);
return(false);
}
}
/// <summary>
/// Search and returns a tree item behind a specified path.
/// </summary>
/// <param name="strPath">Item (menu / parameter) to search for.</param>
/// <returns>
/// <br>TreeItem: If call worked fine</br>
/// <br>Null: If an error occurred</br>
/// </returns>
private TreeItem GetTreeItemByPath(string strPath)
{
string[] seperator = { "//" };
string[] pathParts = strPath.Split(seperator, StringSplitOptions.None);
int counter = 0;
int lastFoundTreeItemChildIndex = -1;
TreeItem lastFoundTreeItem = null;
TreeItem treeItem = null;
try
{
for (counter = 0; counter < pathParts.Length; counter++)
{
// Get treeitem if it is visible at current GUI
treeItem = NavigationElements.GetTreeItem(pathParts[counter], lastFoundTreeItemChildIndex);
if (counter == pathParts.Length - 2 && treeItem != null)
{
treeItem.Click();
Parameter parameter = new Application().GetParameterStateFast(pathParts[pathParts.Length - 1]);
if (parameter.ParameterState != ParameterState.NotRecognized)
{
return(treeItem);
}
}
if (treeItem == null)
{
// If scrollbar active and not null
if (NavigationElements.VerticalScrollbar != null && NavigationElements.VerticalScrollbar.Enabled)
{
if (NavigationElements.PageUpButton.ScreenRectangle.Size.Height == 0)
{
// If scrollbar is on top
// Scroll down
treeItem = this.ScrollAndSearchTreeItem(NavigationElements.PageDownButton, pathParts[counter], lastFoundTreeItemChildIndex);
}
else if (NavigationElements.PageDownButton.ScreenRectangle.Size.Height == 0)
{
// If scrollbar is on bottom
// Scroll up
treeItem = this.ScrollAndSearchTreeItem(NavigationElements.PageUpButton, pathParts[counter], lastFoundTreeItemChildIndex);
}
else if (NavigationElements.PageUpButton.ScreenRectangle.Size.Height <=
NavigationElements.PageDownButton.ScreenRectangle.Size.Height)
{
// If scrollbar is nearly on top
// Scroll down first
treeItem = this.ScrollAndSearchTreeItem(NavigationElements.PageDownButton, pathParts[counter], lastFoundTreeItemChildIndex);
// Scroll up as next if treeItem noch found
if (treeItem == null)
{
treeItem = this.ScrollAndSearchTreeItem(NavigationElements.PageUpButton, pathParts[counter], lastFoundTreeItemChildIndex);
}
}
else if (NavigationElements.PageUpButton.ScreenRectangle.Size.Height >
NavigationElements.PageDownButton.ScreenRectangle.Size.Height)
{
// If scrollbar is nearly on bottom
// Scroll down first
treeItem = this.ScrollAndSearchTreeItem(NavigationElements.PageDownButton, pathParts[counter], lastFoundTreeItemChildIndex);
// Scroll up as next if treeItem noch found
if (treeItem == null)
{
treeItem = this.ScrollAndSearchTreeItem(NavigationElements.PageUpButton, pathParts[counter], lastFoundTreeItemChildIndex);
}
}
else
{
Log.Error(LogInfo.Namespace(MethodBase.GetCurrentMethod()), "Impossible path at if-then-else structure.");
}
}
else
{
// if Scrollbar not active search for treeitem with index greater than last found
Log.Info(LogInfo.Namespace(MethodBase.GetCurrentMethod()), "Treeitem " + "[" + pathParts[counter] + "]" + " not found");
}
}
if (treeItem != null)
{
treeItem.MoveTo();
lastFoundTreeItemChildIndex = treeItem.Element.ChildIndex;
lastFoundTreeItem = treeItem;
}
if (counter >= (pathParts.Length - 1))
{
continue;
}
if (treeItem != null)
{
treeItem.Expand();
}
}
return(lastFoundTreeItem);
}
catch (Exception exception)
{
Log.Error("Navigation.GetTreeItemByPath@" + pathParts[counter], exception.Message);
return(null);
}
}